WO2023172007A1 - 발광소자 및 디스플레이 장치 - Google Patents
발광소자 및 디스플레이 장치 Download PDFInfo
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- WO2023172007A1 WO2023172007A1 PCT/KR2023/003048 KR2023003048W WO2023172007A1 WO 2023172007 A1 WO2023172007 A1 WO 2023172007A1 KR 2023003048 W KR2023003048 W KR 2023003048W WO 2023172007 A1 WO2023172007 A1 WO 2023172007A1
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- Prior art keywords
- light emitting
- light
- molding
- emitting diode
- emitting diodes
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/85—Packages
- H10H20/852—Encapsulations
- H10H20/854—Encapsulations characterised by their material, e.g. epoxy or silicone resins
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H29/00—Integrated devices, or assemblies of multiple devices, comprising at least one light-emitting semiconductor element covered by group H10H20/00
- H10H29/20—Assemblies of multiple devices comprising at least one light-emitting semiconductor device covered by group H10H20/00
- H10H29/24—Assemblies of multiple devices comprising at least one light-emitting semiconductor device covered by group H10H20/00 comprising multiple light-emitting semiconductor devices
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/85—Packages
- H10H20/855—Optical field-shaping means, e.g. lenses
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H29/00—Integrated devices, or assemblies of multiple devices, comprising at least one light-emitting semiconductor element covered by group H10H20/00
- H10H29/80—Constructional details
- H10H29/85—Packages
- H10H29/852—Encapsulations
- H10H29/854—Encapsulations characterised by their material, e.g. epoxy or silicone resins
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H29/00—Integrated devices, or assemblies of multiple devices, comprising at least one light-emitting semiconductor element covered by group H10H20/00
- H10H29/80—Constructional details
- H10H29/882—Scattering means
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W90/00—Package configurations
Definitions
- the present invention relates to light emitting devices and display devices.
- a light emitting diode is a semiconductor light-emitting device that emits light when electrons and holes meet when an electric current is applied. These light emitting diodes can emit light and are used as backlight light sources in display devices, display elements, lighting devices, etc.
- the present invention provides a light emitting module and a display device having an improved structure to alleviate color difference depending on the viewing angle of the display module and minimize luminance loss.
- the present invention provides a light emitting module and a display device having an improved structure to minimize dark and bright lines of the display module.
- the present invention provides a light emitting module and a display device that can precisely emit red, green, and blue light from a display module at a desired luminance ratio.
- a plurality of light emitting diodes 100 capable of emitting light
- a substrate 300 electrically connected to the plurality of light emitting diodes 100
- a molding part 200 covering at least one side of the plurality of light emitting diodes.
- the light-emitting device can be implemented as a part of a display device, and it is obvious that configurations applied to the light-emitting device can also be applied to the display device according to an embodiment. For convenience, this disclosure mainly describes light-emitting devices.
- the plurality of light emitting diodes 100 may include a first light emitting diode 101 that emits red light, a second light emitting diode 102 that emits green light, and a third light emitting diode 103 that emits blue light.
- the molding part 200 may include one or more of a plurality of different color pigments and a plurality of different color dyes. That is, one or more of a plurality of different color pigments and a plurality of dyes of opposite colors are mixed and included in the molding part, so that the molding part can have various colors depending on the type of pigment or dye mixed in the molding part. . Additionally, depending on the combination of colors of the pigment or dye (D) included in the molding portion 200, the brightness or saturation of the color displayed by the molding portion 200 may be adjusted. For example, when the molding part 200 is black, the brightness and saturation of black can be adjusted. That is, the black color displayed by the molding portion 200 may become darker or less dark.
- the transparency of the molding part 200 can be adjusted depending on the concentration of the pigment or dye (D) mixed in the molding part 200.
- the molding part 200 may be a colored molding with a transparency of 20% or more. Accordingly, the molding part 200 can implement a color that matches the user's sensibility.
- the molding part 200 containing pigment or dye (D) can improve the color difference of the light emitted from the plurality of light emitting devices 1 and achieve uniform color expression of the display.
- the color displayed by the molding part 200 in which at least one type of dye or pigment is mixed may satisfy any one of the three ranges below in the LAB color coordinate system.
- the molding part 200 may further include at least one of a polymer resin and a curing initiator in addition to the pigment or dye described above.
- the polymer resin may include, for example, one or more of silicone, epoxy, and acrylate.
- the curing initiator may be, for example, a thermal curing initiator or an ultraviolet curing initiator.
- the molding part 200 may further include a binder.
- the light emitting device may include an upper molding 204 disposed on the upper surface of the molding part.
- the top molding may be molding or film.
- the upper molding 204 may be formed of multiple layers. According to one embodiment, at least one of the upper moldings 204 formed of a plurality of layers may be an anti-glare layer, that is, an anti-glare layer. According to one embodiment, at least one of the plurality of upper moldings 204 may be a transparent layer.
- At least one surface of the upper molding 204 may have roughness.
- the light emitting device may include a lower molding disposed on the lower surface of the molding part.
- the molding part 200 may further include a diffusion agent 203.
- the dispersant may include one or more of PMMA (polymethylmethacrylate), silica (SiO 2 ), and zirconium dioxide.
- the horizontal direction and vertical direction can be defined as follows.
- the vertical direction may be defined as the direction in which the first light emitting diode 101 that emits red light, the second light emitting diode 102 that emits green light, and the third light emitting diode 103 that emits blue light are arranged, and the horizontal direction can be defined as a direction perpendicular to this vertical direction.
- the light transmitted through the molding part 200 containing the diffusion agent has a color difference of 0.01 when the light-emitting device is viewed from a 45-degree angle with respect to when the light-emitting device is viewed from the front. It could be within.
- the 45-degree angle may be defined as both sides in the horizontal or vertical direction from the virtual center line viewed from the front of the light emitting device.
- the light transmitted through the molding part 200 containing the diffusion agent has a color difference of 0.03 when the light-emitting device is viewed from an 80-degree angle with respect to when the light-emitting device is viewed from the front. It could be within.
- the 80-degree angle may be defined as both sides in the horizontal or vertical direction from the virtual center line viewed from the front of the light-emitting device.
- the light transmitted through the molding part 200 containing the diffusion agent has a color difference of 0.05 when the light-emitting device is viewed from a 90-degree angle with respect to when the light-emitting device is viewed from the front. It could be within.
- the 90-degree angle may be defined as both sides in the horizontal or vertical direction from the virtual center line viewed from the front of the light-emitting device.
- the amount of light transmitted through the molding portion 200 containing the diffusion agent increases.
- Color difference may increase linearly. Accordingly, not only can the color difference depending on the viewing angle of the light emitting device be significantly reduced, but even if the user perceives the color difference, visual discomfort can be prevented due to the linear color change.
- the color difference may vary linearly within a range of -80 degrees to +80 degrees in the horizontal or vertical direction when the light emitting device is viewed from the front.
- the dispersing agent may be injected into the molding part 200 in an amount of 5% to 20% of the weight of the molding part 200.
- the molding part 200 may further include a matting agent.
- the matting agent mixed in the molding part 200 may form irregularities on the surface of the molding part 200.
- the thickness of the molding part 200 may be two to three times the thickness of the light emitting diode.
- the luminance ratio of the first light emitting diode 101, the second light emitting diode 102, and the third light emitting diode 103 is a:b:c, and the luminance ratio is a.
- a light emitting device (1) satisfying the conditions of greater than 2.5 but less than 3.5, b greater than 5.5 less than 6.5, and c greater than 0.5 less than 1.5 can be provided.
- each of the plurality of light emitting diodes 100 includes a first terminal (E1) and a second terminal (E2) having different poles, and any one of the plurality of light emitting diodes (100) includes a first terminal (E1) and a second terminal (E2) having different poles.
- the substrate A light emitting device 1 that can be disposed on 300) may be provided.
- a light emitting device 1 may be provided in which one of the light emitting diodes 100 emits light with a longer peak wavelength than the other light emitting diodes 100.
- the substrate 300 includes a base 310 supporting the plurality of light emitting diodes 100; and a substrate electrode (320, 330, 340, 350) electrically connected to the first terminal (E1) and the second terminal (E2), wherein the substrate electrodes (320, 330, 340, 350) are connected to the plurality of
- a light emitting device 1 may be provided extending from one side of the base 310 on which the two light emitting diodes 100 are placed to surround the outer surface of the base 310.
- first light emitting diode 101, the second light emitting diode 102, and the third light emitting diode 103 are placed on one surface of the base 310 to be spaced apart from each other, and the substrate electrode 320, 330, 340, and 350 are first substrate electrodes that electrically connect the first terminals (E1) of each of the first light emitting diode 101, the second light emitting diode 102, and the third light emitting diode 103.
- a light emitting element (1) extending through and extending may be provided.
- the light emitting device 1 may be provided, wherein the first substrate electrode 320 includes a bent shape at one point and a bent shape at another point P2 that is different from the one point P1. You can.
- the plurality of substrate electrodes 320, 330, 340, and 350 are provided, and the plurality of substrate electrodes 320, 330, 340, and 350 are electrically insulated from each other and extend from the one surface through the outer surface.
- a light emitting device 1 may be provided that extends to the other side of the base 310, which is the opposite side of the one side, and is disposed on the other side.
- the light emitting device 1 is provided in which the area connected to the first terminal E1 among the plurality of substrate electrodes 320, 330, 340, and 350 has a different area from the area connected to the second terminal E2. It can be.
- the plurality of substrate electrodes 320, 330, 340, and 350 are point symmetrical with respect to the center of the base 310 when the base 310 is viewed from the side where the other surface of the base 310 is located.
- a light emitting device 1 arranged to have point symmetry may be provided.
- the light emitting device 1 may be provided so that the width (W) of any one of the plurality of substrate electrodes (320, 330, 340, 350) is greater than the separation distance (D) between adjacent portions of the plurality of substrate electrodes (320, 330, 340, 350). .
- the molding part 200 further includes a molding part 200 that encapsulates the light emitting diode 100, and the molding part 200 includes at least one of the substrate electrodes 320, 330, 340, and 350 covering the outer surface and the other surface.
- a light emitting element 1 extending to partially surround the light emitting element 1 may be provided.
- a plurality of light emitting diodes 100 capable of emitting light; and a substrate 300 electrically connected to the plurality of light emitting diodes 100, wherein the plurality of light emitting diodes 100 include a first light emitting diode 101 that emits red light and a second light emitting diode that emits green light.
- a light emitting device (1) may be provided, including (102) and a third light emitting diode (103) that emits blue light, and each of the plurality of light emitting diodes (100) has different beam angles.
- the light emitting diode 100 has an intensity of light emitted from the center of the light emitting diode 100 to one side of the x-axis, which is greater than the intensity of light emitted to the other side of the x-axis, and A light emitting device 1 may be provided that emits light such that the intensity of light emitted to one side is greater than the intensity of light emitted to the other side of the y-axis.
- the light-emitting device 1 may be provided so that the beam angle of one of the plurality of light-emitting diodes 100 that emits light with the longest wavelength is smaller than the beam angle of another one of the plurality of light-emitting diodes 100. You can.
- the x-axis beam angle and the y-axis beam angle of the light-emitting diode 100 are different from each other. It can be.
- the light emitting device 1 may be provided in which the difference between the x-axis beam angle and the y-axis beam angle of the light-emitting diode 100 is 10° or less.
- the difference between the x-axis beam angle of one of the plurality of light-emitting diodes 100 and the A light emitting device 1 may be provided in which the difference between the angle and the other y-axis beam angle is 30° or less.
- a plurality of light emitting diodes 100 capable of emitting light; and a substrate 300 electrically connected to the plurality of light emitting diodes 100, wherein the plurality of light emitting diodes 100 include a first light emitting diode 101 that emits red light and a second light emitting diode that emits green light. (102) and a third light emitting diode 103 that emits blue light, and the plurality of light emitting diodes 100 have different driving voltages (Vf) when the same current flows through each of the plurality of light emitting diodes 100. ), a light emitting device 1 may be provided.
- one of the plurality of light emitting diodes 100 that emits light with the longest wavelength may be provided with a light emitting device 1 having a smaller driving voltage (Vf) than the other one of the plurality of light emitting diodes 100.
- Vf driving voltage
- the driving voltage of any one of the plurality of light emitting diodes 100 that emits light with the longest wavelength and the longest wavelength of the plurality of light emitting diodes 100 A light emitting device 1 may be provided in which the difference between the driving voltage of one emitting light with a short wavelength is less than 1V.
- One embodiment of the present invention has the effect of accurately emitting red light, green light, and blue light at a desired luminance ratio.
- FIG. 1 is a plan view schematically showing a light emitting device according to the present invention.
- Figure 2 is a plan view showing the light emitting device of Figure 1 with the molding part omitted.
- Figure 3 is a cross-sectional view taken along line A-A' of Figure 1.
- FIG. 4 is a graph showing the x-axis beam angle of the first to third light emitting diodes of FIG. 1.
- Figure 5 is a graph showing the y-axis beam angle of the first to third light emitting diodes of Figure 1.
- FIG. 6 is a graph showing the intensity of light relative to the angle from the x-axis of the first to third light emitting diodes of FIG. 1.
- FIG. 7 is a graph showing the intensity of light relative to the angle from the y-axis of the first to third light emitting diodes of FIG. 1.
- Figure 8 is an enlarged cross-sectional view of the light emitting diode of Figure 3.
- Figure 9 is a view showing the upper surface of the molding part of Figure 3 being roughened.
- Figure 10 is a plan view schematically showing the substrate of Figure 1.
- FIG. 11 is a view showing irregularities formed on the side of the base of FIG. 3.
- FIG. 12 is a cross-sectional view taken along line B-B' of FIG. 1.
- FIG. 13 is a diagram showing the second pattern connection portion of FIG. 10 having a linear shape.
- FIG. 14 is a diagram showing that a portion of the third pattern connection portion of FIG. 12 that is connected to the first side pattern protrudes upward.
- Figure 15 is a rear view schematically showing the substrate of Figure 1.
- Figure 16 is a longitudinal cross-sectional view of a light emitting device according to a second embodiment of the present invention.
- Figure 17 is a plan view schematically showing the substrate of Figure 16.
- FIG. 18 is a cross-sectional view of another part of the light emitting device of FIG. 16 cut in the longitudinal direction.
- Figure 19 is a rear view schematically showing a substrate according to a third embodiment of the present invention.
- Figure 20 is a longitudinal cross-sectional view of a light emitting device according to a fourth embodiment of the present invention.
- Figure 21 is a longitudinal cross-sectional view of a light emitting device according to a fifth embodiment of the present invention.
- Figure 22 is a longitudinal cross-sectional view of a light emitting device according to a sixth embodiment of the present invention.
- Figure 23 is a longitudinal cross-sectional view of a light emitting device according to a seventh embodiment of the present invention.
- Figure 24 is a longitudinal cross-sectional view of a light emitting device according to the eighth embodiment of the present invention.
- Figures 25 and 26 are longitudinal cross-sectional views of the light emitting device according to the ninth embodiment of the present invention, showing enlarged portions of the light emitting diode and the molding portion.
- Figure 27 is a diagram showing the coordinate range in the LAB color coordinate system that the molding part of the light emitting device according to the ninth embodiment of the present invention can have.
- Figures 28 and 29 are longitudinal cross-sectional views of the light emitting device according to the tenth embodiment of the present invention, showing enlarged portions of the light emitting diode and the molding portion.
- Figure 30 is a graph showing the color difference ( ⁇ u'v') according to the viewing angle of the molding part of the light emitting device when the diffusion agent is included and when the diffusion agent is not included.
- Figure 31 is a graph showing the color difference ( ⁇ u'v') according to the viewing angle according to the amount of diffusion agent included in the molding part of the light emitting device according to the tenth embodiment of the present invention.
- Figure 32 is a diagram showing the color difference ( ⁇ u'v') according to the viewing angle according to the thickness of the molding part of the light emitting device according to the 11th embodiment of the present invention.
- Figure 33 is a diagram showing the thickness of the molding portion of the light emitting device according to the 11th embodiment of the present invention.
- the light emitting device 1 can receive power from the outside and radiate light.
- This light emitting device 1 may include a light emitting diode 100, a molding part 200, a substrate 300, and a conductive material 400.
- the light emitting diode 100 can generate light.
- the light emitting diode 100 may emit light with peak wavelengths in the ultraviolet ray wavelength band, visible ray wavelength band, and infrared ray wavelength band.
- the light emitting diode 100 may have a square shape with four corners when viewed from the top. Alternatively, it may include a long rectangular shape having a major axis and a minor axis, where the minor axis may have a relatively small horizontal cross-sectional area compared to the major axis.
- the length of the major axis of the light emitting diode 100 may be less than twice the length of the minor axis.
- the light emitting diode 100 is not limited to this and may have various forms.
- the light emitting diode 100 may have a long axis of 100 um to 300 um, a minor axis of 50 um to 150 um, and a height of 100 um to 300 um.
- the size of the light emitting diode 100 is not necessarily limited to this, and the length of the major and minor axes may be 50 um or less.
- a plurality of such light emitting diodes 100 may be provided, and the plurality of light emitting diodes 100 may include a first light emitting diode 101, a second light emitting diode 102, and a third light emitting diode 103. .
- the plurality of light emitting diodes 100 may emit light in the same color range.
- Light in the same color range emitted from a plurality of light emitting diodes 100 may have different center wavelengths. At least one of the plurality of light emitting diodes 100 may emit light with different color gamuts.
- the first light emitting diode 101, the second light emitting diode 102, and the third light emitting diode 103 may emit light of different colors.
- the plurality of light emitting diodes 100 may have substantially the same cross-sectional area when viewed from the top. Additionally, at least one of the plurality of light emitting diodes 100 may have a different cross-sectional area when viewed from the top. In particular, the area of the light emitting diode 100 that emits long wavelengths may be different. Through this, the luminous intensity ratio of the lights emitted from the plurality of light emitting diodes 100 can be easily adjusted.
- the first light emitting diode 101 may emit red light, for example, light in a wavelength range of 600 nm to 780 nm. Additionally, the second light emitting diode 102 may emit green light, for example, light in the 492nm to 577nm wavelength band. Additionally, the third light emitting diode 103 may emit blue light and, for example, may irradiate light in a wavelength range of 430 nm to 492 nm. The first light emitting diode 101, the second light emitting diode 102, and the third light emitting diode 103 may emit light in different wavelength ranges and may emit light simultaneously or individually. Preferably, the first light emitting diode 101, the second light emitting diode 102, and the third light emitting diode 103 may emit light of different peak wavelengths and may emit light simultaneously or individually.
- the first light emitting diode 101, the second light emitting diode 102, and the third light emitting diode 103 may emit light having different luminance or light emission intensity. Additionally, the luminance ratio of the first light emitting diode 101, the second light emitting diode 102, and the third light emitting diode 103 can be adjusted. The luminance ratio of the first light emitting diode 101, the second light emitting diode 102, and the third light emitting diode 103 may be 2 to 4:5 to 7:1. For example, the luminance ratio can be expressed as a:b:c, where a is greater than 2.5 but less than 3.5, b is greater than 5.5 but less than 6.5, and c is greater than 0.5 but less than 1.5.
- the luminance ratio of the first light emitting diode 101, the second light emitting diode 102, and the third light emitting diode 103 may be about 3:6:1, but this is only an example, and thus the present invention This is not limited.
- the first light emitting diode 101, the second light emitting diode 102, and the third light emitting diode 103 may emit light having different color coordinate values (Cx, Cy).
- color coordinate values (Cx, Cy) refer to standard coordinate values according to 'CIE 1391'.
- the first light emitting diode 101 may emit light having an x color coordinate (Cx) in the range of 0.5 to 0.75 and a y color coordinate (Cy) in the range of 0.15 to 0.35.
- the second light emitting diode 102 may emit light having an x-color coordinate (Cx) within the range of 0.01 to 0.34 and a y-color coordinate (Cy) within the range of 0.4 to 0.83.
- the third light emitting diode 103 may emit light having an x color coordinate (Cx) within the range of 0.05 to 0.25 and a y color coordinate (Cy) within the range of 0.01 to 0.5.
- the first light emitting diode 101, the second light emitting diode 102, and the third light emitting diode 103 may have different driving voltages (Vf) when the same current flows.
- the driving voltage (Vf) refers to the voltage for driving the light emitting diode 100, and may be a value measured when a current of 1 mA flows.
- the driving voltage (Vf) can be higher.
- the driving voltage (Vf) of the first light emitting diode 101 may be 1.8V to 2.1V
- the driving voltage (Vf) of the second light emitting diode 102 may be 2.1V to 2.6V
- the driving voltage (Vf) of the third light emitting diode 103 may be 2.6V to 2.9V.
- the first light emitting diode 101, the second light emitting diode 102, and the third light emitting diode 103 have a driving voltage (Vf) of the diode that emits light with the longest wavelength and a driving voltage (Vf) of the diode that emits light with the shortest wavelength.
- the difference in driving voltage (Vf) of the diode may be less than 1V.
- the difference between the driving voltage (Vf) of the first light-emitting diode 101, which emits light with the longest wavelength, and the driving voltage (Vf) of the third light-emitting diode 103, which emits light with the shortest wavelength, is 1V. It may be less than
- the difference in driving voltage (Vf) between the plurality of light emitting diodes 100 is less than 1V, the effect of preventing electrical and heat concentration from occurring in a specific light emitting diode when the same current is supplied, thereby ensuring stable driving. There is.
- the light-emitting device 1 includes a first surface parallel to the long axis of at least one light-emitting diode 101, 102, and 103, and a second surface perpendicular to the first surface, and the first surface of the light-emitting device 1
- the length may be between 2 times and 7 times the length of the long axis of the light emitting diodes 101, 102, and 103.
- the length of the first side of the light emitting element 1 is greater than the sum of the lengths of the minor axis of the plurality of light emitting diodes 101, 102, and 103, and is the sum of the lengths of the minor axis of the plurality of light emitting diodes 101, 102, and 103.
- the length of the second side of the light emitting device 1 may be at least 2 times and at most 7 times the length of the long axis of the light emitting diodes 101, 102, and 103.
- the length of the second side of the light emitting element 1 is greater than the sum of the lengths of the minor axes of the plurality of light emitting diodes 101, 102, and 103, and the sum of the lengths of the minor axes of the plurality of light emitting diodes 101, 102, and 103 is 5. It may be twice or less.
- the length of the light emitting device 1 has at least one of the above length relationships based on the light emitting diode, when a plurality of light emitting devices 1 are arrayed in rows and columns on a circuit board, the center of each light emitting device 1 Since the minimum distance between modules can be arranged regularly based on the length of the first or second side, it is possible to implement a module with minimized color deviation.
- the first light emitting diode 101, the second light emitting diode 102, and the third light emitting diode 103 may have different beam angles or patterns.
- the beam angle refers to a light emission angle that shows a luminous intensity of 50% or more of the maximum luminous intensity in the light emitted from the light emitting diode 100.
- the beam angle means an angle that is twice the angle between a first point where the luminous intensity of light emitted from the light emitting diode 100 is the highest and a second point where the luminous intensity is 50% of the first point.
- the first light emitting diode 101, the second light emitting diode 102, and the third light emitting diode 103 may have an x-axis beam angle smaller than the y-axis beam angle.
- the x-axis beam angle is a value when the angle is measured based on the x-axis
- the y-axis beam angle is a value when the angle is measured based on the y-axis.
- the x-axis beam angle of the first light emitting diode 101 may be within the range of 105 to 115°
- the y-axis beam angle may be within the range of 110 to 120°.
- the x-axis beam angle of the second light emitting diode 102 may be within the range of 120 to 140°, and the y-axis beam angle may be within the range of 135 to 145°.
- the x-axis beam angle of the third light emitting diode 103 may be 120 to 140°, and the y-axis beam angle may be within the range of 135 to 145°. This is to enable effective color implementation by considering the luminous efficiency of each light emitting diode (101, 102, and 103).
- the difference between the x-axis beam angle and the y-axis beam angle of each light-emitting diode within the first light-emitting diode 101, the second light-emitting diode 102, and the third light-emitting diode 103 may be 10° or less.
- the first light emitting diode 101, the second light emitting diode 102, and the third light emitting diode 103 may have different orientation patterns.
- the orientation patterns of each light emitting diode (101, 102, and 103) based on the x-axis may include some areas that do not overlap.
- the orientation patterns of each light emitting diode 101, 102, and 103 based on the y-axis may include some areas that do not overlap. This is to enable effective color implementation by considering the luminous efficiency of each light emitting diode (101, 102, and 103).
- the first light emitting diode 101, the second light emitting diode 102, and the third light emitting diode 103 may have the smallest beam angle, with the diode emitting light having the longest peak wavelength.
- the beam angle of at least one light emitting diode that emits light with the longest peak wavelength among the first light emitting diode 101, the second light emitting diode 102, and the third light emitting diode 103 is greater than that of the other light emitting diodes. It may be smaller than the beam angle it has.
- the first light emitting diode 101 which emits light with the longest peak wavelength, may have a smaller beam angle than the third light emitting diode 103, which emits light with the shortest peak wavelength.
- the difference between the largest x-axis beam angle and the smallest x-axis beam angle may be 30° or less.
- the difference between the x-axis beam angle of the third light-emitting diode 103 and the x-axis beam angle of the first light-emitting diode 101 is 30° or less.
- the difference between the largest y-axis beam angle and the smallest y-axis beam angle among the y-axis beam angles of the first light-emitting diode 101, the second light-emitting diode 102, and the third light-emitting diode 103 is 30° or less. You can.
- the difference between the y-axis beam angle of the third light emitting diode 103 and the y-axis beam angle of the first light emitting diode 101 is 30° or less.
- the difference in the x-axis beam angle or the y-axis beam angle of the plurality of light emitting diodes (101, 102, 103) is set to 30° or less, the light becomes uniform no matter what angle it is viewed from, thereby improving visibility deterioration depending on the viewing angle. there is.
- FIGS. 6 and 7 show beam angles and beam patterns expressed with the x-axis being the beam angle and the y-axis being the emission luminance.
- the light emitting diode 100 may emit light asymmetrically with respect to the center of the light emitting diode 100.
- the intensity of light emitted from the center of at least one light emitting diode 101, 102, and 103 in one direction of the x-axis may be greater than the intensity of light emitted in the other direction of the x-axis, and the beam angle graph is It may be biased to one side.
- the intensity of light emitted from the center of at least one light emitting diode 101, 102, and 103 in one direction of the y-axis may be greater than the intensity of light emitted in the other direction of the y-axis, and the beam angle graph may be shown in one direction of the y-axis. It can be biased.
- At least one light emitting diode may have greater light emission intensity at a beam angle of 20° than at a beam angle of 0°.
- the light emitting diode 100 includes a light transmitting portion 110, a light emitting structure 120, an ohmic layer 130, a contact electrode 140, a bump electrode 150, and an insulating layer 160. It can be included.
- the light transmitting portion 110 may be an insulating or conductive substrate.
- the light transmitting portion 110 may be a growth substrate for growing the light emitting structure 120, and may include, for example, one of a sapphire substrate, a silicon carbide substrate, a silicon substrate, a gallium nitride substrate, and an aluminum nitride substrate. Additionally, the light transmitting portion 110 may include a light transmitting material having a light transmittance of at least 70% or more. Additionally, the light transmitting portion 110 may include one or more of silicone molding, resin, and polymer as other examples. Additionally, the light transmitting portion 110 may include a conductive material in some areas, and the areas containing the conductive material may be patterned and divided into arbitrary shapes.
- the light transmitting portion 110 may have irregularities formed on at least a portion of its surface.
- the unevenness formed on the light transmitting portion 110 may include a plurality of protrusions, and the plurality of protrusions may be formed in a regular or irregular pattern.
- some of the plurality of protrusions on the surface of the light transmitting portion 110 may be located between the light emitting structure 120 and the light transmitting portion 110. These plurality of protrusions can improve the extraction efficiency of light emitted from the light emitting structure 120.
- the light transmitting portion 110 has a plurality of side surfaces extending from one side of the light transmitting portion 110 to the back surface, and the side surfaces of the light transmitting portion 110 have arbitrary angles. At least one side among the plurality of sides of the light transmitting portion 110 may extend at different angles from one side or the rear surface of the light transmitting portion 110. Additionally, at least one side of the light transmitting portion 110 may include a region where the upper and lower inclination angles are different, and the light transmitting portion 110 may include a roughened surface on the side. By forming an inclined surface or a rough surface on one surface of the light transmitting portion 110, the luminous efficiency of light emitted from the light emitting structure 120 can be improved.
- the side surface of the light transmitting portion 110 may be extended to be inclined with respect to the upper surface of the base 310. However, this is only an example, and the side surface of the light transmitting portion 110 may be extended to be perpendicular to the upper surface of the base 310.
- the light emitting structure 120 is disposed on one side of the light transmitting portion 110.
- This light emitting structure 120 may be provided in a long rectangular shape having a major axis and a minor axis similar to the light transmitting portion 110 when viewed from the top, but is not limited to this and may have various shapes.
- the area of the light-emitting structure 120 is smaller than the area of the light-transmitting part 110, and a portion of one surface of the light-transmitting part 110 may be exposed along the circumference of the light-emitting structure 120.
- one side of the light transmitting portion 110 with the same width may be exposed on both sides of the light emitting structure 120, but this is not necessarily limited, and the exposed side of the substrate on both sides may have different widths.
- the width of the lower surface of the light transmitting portion 110 exposed in one direction may be in the range of 6:1 to 10:1 with respect to the length of the light transmitting portion 110 in one direction.
- the ratio of the width of the light-transmitting portion 110 exposed in the longitudinal direction to the longitudinal length of the light-transmitting portion 110 may be about 1/10 to about 1/6.
- the ratio of the width of the light-transmitting portion 110 exposed in the horizontal direction to the horizontal length of the light-transmitting portion 110 may be about 1/10 to about 1/6.
- the light emitting structure 120 can generate light.
- the total thickness of this light emitting structure 120 may be in the range of 1um to 10um.
- the light emitting structure 120 of the first light emitting diode 101 is made of aluminum gallium arsenide (AlGaAs), aluminum gallium phosphide (AlGaP), and indium gallium arsenide (InGaAs).
- indium gallium phosphide InGaP, indium gallium phosphide
- indium phosphide InP, indium phosphide
- aluminum indium phosphide AlInp, aluminum indium phosphide
- indium aluminum gallium phosphide InAlGaP, indium aluminum gallium phosphide
- gallium arsenic phosphide GaAsP
- GaAsP gallium arsenide phosphide
- AlGaInP aluminum gallium indium phosphide
- GaP gallium phosphide
- the light emitting structure 120 of the second light emitting diode 102 is made of indium gallium nitride (InGaN, indium gallium nitride), gallium nitride (GaN, gallium nitride), gallium phosphide (GaP), and aluminum gallium indium phosphide ( It may include one or more of aluminum gallium indium phosphide (AlGaInP), aluminum gallium nitride (AlGaN), indium aluminum gallium nitride (InAlGaN), and aluminum gallium phosphide (AlGaP). .
- AlGaInP aluminum gallium indium phosphide
- AlGaN aluminum gallium nitride
- AlGaN aluminum gallium nitride
- InAlGaN indium aluminum gallium nitride
- AlGaP aluminum gallium phosphide
- the light emitting structure 120 of the third light emitting diode 103 is made of gallium nitride (GaN, gallium nitride), indium gallium nitride (InGaN, indium gallium nitride), aluminum gallium nitride (AlGaN, aluminum gallium nitride), and indium aluminum gallium. It may contain one or more of nitride (InAlGaN, indium aluminum gallium nitride) and zinc selenide (ZnSe, zinc selenide).
- This light emitting structure 120 includes a first conductive semiconductor layer 121, a second conductive semiconductor layer 122, and an active layer 123.
- the first conductive semiconductor layer 121 may have an inclined side surface.
- the inclination angle of the inclined side of the first conductive semiconductor layer 121 may be about 60 degrees or less with respect to one side or the back side of the light transmitting portion 110.
- the second conductive semiconductor layer 122 may be disposed on the first conductive semiconductor layer 121.
- the first conductive semiconductor layer 121 may include n-type impurities (e.g., Si, Ge, Sn, Te), and the second conductive semiconductor layer 122 may include p-type impurities (e.g., For example, it may include Mg, Sr, Ba).
- the first conductive semiconductor layer 121 may be an n-type semiconductor layer, and the second conductive semiconductor layer 122 may be a p-type semiconductor layer.
- the first conductive semiconductor layer 121 may contain p-type impurities, and the second conductive semiconductor layer 122 may contain n-type impurities.
- the first conductive semiconductor layer 121 is shown as a single layer in the drawing, but this is only an example and may be made of multiple layers, and may also include a superlattice layer.
- the active layer 123 may include a multiple quantum well structure (MQW), and may be implemented by adjusting the bandgap energy by adjusting the composition ratio of the Group III material of the nitride-based semiconductor to emit a desired wavelength. This active layer 123 may be located between the first conductive semiconductor layer 121 and the second conductive semiconductor layer 122.
- MQW multiple quantum well structure
- the first conductive semiconductor layer 121, the second conductive semiconductor layer 122, and the active layer 123 may include a III-V series nitride-based semiconductor, for example, (Al, Ga, In) and It may include the same nitride-based semiconductor.
- the light emitting structure 120 may include a mesa (M) including a second conductive semiconductor layer 122 and an active layer 123.
- the second conductive semiconductor layer 122 and the active layer 123 included in the light emitting structure 120 may form a mesa (M).
- the mesa (M) may be located on a partial area of the first conductive semiconductor layer 121, and the mesa (M) may have a thickness in the range of approximately 1 to 2 um.
- a portion of the first conductivity type semiconductor layer 121 may be exposed outside the mesa (M).
- the inclined surface of the mesa (M) is parallel to the inclined surface of the first conductive semiconductor layer 121, and accordingly, the exposed surface of the lower surface of the first conductive semiconductor layer 121 is the mesa (M).
- the mesa (M) may be limited to one side. However, this embodiment is not limited to this, and the lower surface of the first conductive semiconductor layer 121 may be exposed along the perimeter of the mesa (M). Additionally, in another embodiment, a through hole (not shown) or a groove (not shown) may be formed inside the mesa M to expose the first conductivity type semiconductor layer 121.
- the first conductive semiconductor layer 121 and the mesa (M) can be divided into an area where the first conductive semiconductor layer 121 and the mesa (M) overlap each other and an area where the first conductive semiconductor layer 121 and the mesa (M) do not overlap. You can. In this case, light may be emitted through an area where the first conductive semiconductor layer 121 and the mesa (M) do not overlap. For example, the area where the first conductive semiconductor layer 121 and the mesa (M) overlap may be larger than the area where the first conductive semiconductor layer 121 and the mesa (M) do not overlap.
- the area where the first conductive semiconductor layer 121 and the mesa (M) overlap may be biased to one side from the x-axis center of the light emitting diode 100 and may be biased to one side from the y-axis center.
- the light emitting diode 100 may emit light so that the light is biased toward one side of the x-axis or y-axis.
- the intensity of light emitted from the light emitting diode 100 may be formed asymmetrically rather than symmetrically with respect to each of the x-axis and y-axis.
- the ohmic layer 130 may be in ohmic contact with the first conductivity type semiconductor layer 121 or the second conductivity type semiconductor layer 122, and the ohmic layer 130 may be disposed on the light emitting structure 120.
- This ohmic layer 130 may be formed as a transparent electrode.
- the transparent electrode of the ohmic layer 130 is ITO (Indium Tin Oxide), ZnO (Zinc Oxide), ZITO (Zinc Indium Tin Oxide), ZIO (Zinc Indium Oxide), ZTO (Zinc Tin Oxide), GITO ( It may include a light-transmitting conductive oxide layer such as Gallium Indium Tin Oxide (GIO), Gallium Indium Oxide (GIO), Gallium Zinc Oxide (GZO), Aluminum doped Zinc Oxide (AZO), and Fluorine Tin Oxide (FTO).
- the conductive oxide layer may include various dopants. This ohmic layer 130 has excellent ohmic contact characteristics with the second conductive semiconductor layer 122.
- a conductive oxide such as ITO or ZnO has a relatively lower contact resistance with the second conductive semiconductor layer 122 than a metallic electrode, so that the light emitting diode 100 can be improved by applying a transparent electrode containing a conductive oxide.
- Luminous efficiency can be improved by reducing the forward driving voltage (Vf).
- Vf forward driving voltage
- the conductive oxide has a lower probability of peeling from the nitride-based semiconductor layer compared to the metallic electrode, and is stable even when used for a long time. The reliability of the light emitting diode 100 can be improved by using a transparent electrode containing such a conductive oxide.
- the thickness of the transparent electrode is not limited, but may have a thickness within the range of about 400 ⁇ to 3000 ⁇ . If the thickness of the transparent electrode is excessively thick, light passing through the transparent electrode may be absorbed and loss may occur, and the thickness of the transparent electrode is limited to 3000 ⁇ or less.
- the transparent electrode is formed to entirely cover the lower surface of the second conductive semiconductor layer 122, thereby improving current dispersion efficiency when driving the light emitting diode 100.
- the sides of the transparent electrode may be formed along the sides of the mesa (M).
- the transparent electrode of the ohmic layer 130 may be formed on the second conductive semiconductor layer 122 after forming the light emitting structure 120, or the second conductive semiconductor layer may be formed in advance before mesa (M) etching. It may also be formed on (122).
- the contact electrode 140 may be electrically connected to the light emitting structure 120 and the bump electrode 150. These contact electrodes 140 may include a first contact electrode 141 and a second contact electrode 142.
- the first contact electrode 141 may be electrically connected to the first conductive semiconductor layer 121 and the first bump electrode 151, which will be described later. This first contact electrode 141 may make ohmic contact to the area exposed by the mesa (M) in the first conductive semiconductor layer 121. Additionally, the first contact electrode 141 may include an ohmic metal layer that makes ohmic contact with the first conductive semiconductor layer 121. This first contact electrode 141 may be arranged so as not to overlap the second conductive semiconductor layer 122 and the active layer 123. In this case, the insulating layer disposed at the bottom of the first contact electrode 141 to insulate the first contact electrode 141 from the second conductive semiconductor layer 122 may be omitted.
- the first contact electrode 141 may be formed on the light emitting structure 120 to which the ohmic layer 130 is connected using, for example, a lift-off process. Meanwhile, the first contact electrode 141 may be separated from the mesa M by a sufficient distance, and the separation distance may be greater than the thickness of the insulating layer 160. However, if the separation distance of the first contact electrode 141 is excessively large, the light emitting area decreases, so the separation distance may be smaller than the diameter of the first contact electrode 141.
- the second contact electrode 142 may be electrically connected to the ohmic layer 130 and the second bump electrode 152, which will be described later. This second contact electrode 142 may be electrically connected to the ohmic layer 130. Additionally, the second contact electrode 142 may be spaced apart from the first contact electrode 141.
- the bump electrode 150 may be electrically connected to the contact electrode 140 and the conductive material 400. These bump electrodes 150 may include a first bump electrode 151 and a second bump electrode 152.
- the first bump electrode 151 may be electrically connected to the first contact electrode 141 and the conductive material 400. This first bump electrode 151 is laminated on the insulating layer 160 and can be connected to the first contact electrode 141 through an opening formed in the insulating layer 160.
- the second bump electrode 152 may be electrically connected to the second contact electrode 142 and the conductive material 400.
- This second bump electrode 152 is laminated on the insulating layer 160 and can be connected to the second contact electrode 142 through an opening formed in the insulating layer 160.
- the insulating layer 160 may cover the light transmitting portion 110, the light emitting structure 120, and the contact electrode 140.
- This insulating layer 160 covers the upper area and side of the mesa (M), and the first conductive semiconductor layer 121 and the side surfaces of the first conductive semiconductor layer 121 exposed around the mesa (M). Cover. Additionally, the insulating layer 160 covers one surface of the light transmitting portion 110 exposed around the first conductive semiconductor layer 121 and covers the area between the contact electrode 140 and the mesa (M). Meanwhile, the insulating layer 160 has a plurality of openings exposing the contact electrode 140. These plurality of openings each have a size smaller than the area of the contact electrode 140 and are limitedly located on the contact electrode 140.
- This insulating layer 160 may be a single layer made of a single material, or, in a different form, may be an insulating reflective layer formed of a plurality of layers.
- the insulating layer 160 When formed as an insulating reflective layer, the insulating layer 160 includes a distributed Bragg reflector.
- the distributed Bragg reflector may be formed by repeatedly stacking a plurality of dielectric layers with different refractive indices, and the plurality of dielectric layers may include one or more of TiO 2 , SiO 2 , HfO 2 , ZrO 2 , Nb 2 O 5 and MgF 2 there is.
- the insulating layer 160 may have a structure of alternately stacked TiO 2 layers/SiO 2 layers.
- the distributed Bragg reflector is manufactured to reflect light generated in the active layer 123 and is formed in a plurality of pairs to improve reflectivity. In this embodiment, the distributed Bragg reflector may include 10 to 25 pairs.
- the insulating layer 160 may include an additional insulating layer 160 along with the distributed Bragg reflector, for example, an additional insulating layer 160 located below the distributed Bragg reflector to improve the adhesion of the distributed Bragg reflector and its underlying layer. It may include an interfacial layer or a protective layer covering the distributed Bragg reflector. This interface layer may be formed of, for example, a SiO 2 layer, and the protective layer may be formed of SiO 2 or SiNx.
- the insulating layer 160 may have a thickness of approximately 2 ⁇ m to 5 ⁇ m.
- the distributed Bragg reflector may have a reflectance of 90% or more for the light generated in the active layer 123, and a reflectance close to 100% can be provided by controlling the type, thickness, and stacking cycle of the plurality of dielectric layers forming the distributed Bragg reflector. You can.
- the distributed Bragg reflector may have a high reflectivity for visible light other than the light generated in the active layer 123.
- the light emitting diode 100 may include a first terminal (E1) and a second terminal (E2).
- This first terminal (E1) may be formed by the first conductive semiconductor layer 121, the first contact electrode 141, and the first bump electrode 151.
- the first terminal E1 may be a portion electrically connected to the first conductive semiconductor layer 121, the first contact electrode 141, and the first bump electrode 151.
- the second terminal E2 may be formed by being electrically connected to the second conductive semiconductor layer 122, the second contact electrode 142, and the second bump electrode 152.
- the first terminal (E1) and the second terminal (E2) may have different polarities.
- the first terminal (E1) may be an n-pole
- the second conductivity type semiconductor layer 122 is a p-type semiconductor layer
- the second terminal (E1) may be an n-pole
- (E2) may be a p pole.
- the first terminal (E1) may be a p-pole and the second terminal (E2) may be an n-pole.
- each of the plurality of light emitting diodes 101, 102, and 103 may be arranged such that the first terminal E1 and the second terminal E2 are spaced apart from each other along the x-axis.
- an imaginary line connecting the center of the first terminal (E1) of one of the plurality of light emitting diodes (101, 102, 103) and the center of the second terminal (E2) is connected to the center of the second terminal (E2) of the other first terminal (E1). It may be parallel to an imaginary line connecting the center of and the center of the second terminal (E2).
- an imaginary line connecting the centers of the first terminal E1 and the second terminal E2 of the first light emitting diode 101 is connected to the first terminal E1 and the second terminal E2 of the second light emitting diode 102. It may be parallel to an imaginary line connecting the centers of each of the second terminals E2. In this case, an imaginary line connecting the centers of each of the first terminal (E1) and the second terminal (E2) may be parallel to the x-axis. Additionally, the plurality of light emitting diodes 101, 102, and 103 may be arranged to be spaced apart from each other along the y-axis.
- the arrangement of the first terminal (E1) and the second terminal (E2) of any one of the plurality of light emitting diodes (101, 102, 103) is similar to the first terminal (E1) of the other part of the plurality of light emitting diodes (101, 102, 103)
- the arrangement of the second terminal (E1) and the second terminal (E2) may be opposite.
- the first terminal (E1) of the first light emitting diode 101 that emits light with the longest wavelength among the first light emitting diode 101, the second light emitting diode 102, and the third light emitting diode 103. and the arrangement of the second terminal E2 may be reversed.
- the first light emitting diode 101 is arranged so that the first terminal (E1) faces one side of the x-axis, and the second light emitting diode 102 and the third light emitting diode 103 are each connected to the first terminal (E1). can be arranged to face the other side of the x-axis.
- the first light emitting diode 101 is disposed on the substrate 300 so that the poles of the second terminal E2 and the third step 213 are arranged opposite to each other.
- the molding part 200 can protect the light emitting diode 100 and improve the light extraction efficiency of the light emitting diode 100.
- the molding part 200 can cover the light emitting diode 100 and has a different refractive index from the light emitting diode 100, so it can effectively refract light emitted from the light emitting diode 100.
- the molding part 200 has a predetermined thickness. For example, the thickness of the molding part 200 from the top surface of the substrate 300 to the top of the molding part 200 may be greater than the thickness from the top surface of the substrate 300 to the top of the light emitting diode 100.
- the thickness of the light emitting diode 100 may be the thickness from the top surface of the light transmitting portion 110 to the first conductivity type semiconductor layer 121.
- This molding part 200 may be formed of a material containing one or more of silicone series, epoxy series, PMMA (polymethyl methacrylate) series, PE (polyethylene) series, and PS (polystyrene) series.
- the molding part 200 may include a black-based material.
- the molding part 200 may include transparent epoxy or transparent silicone resin.
- a diffusion agent 210 may be provided inside the molding part 200. This diffusion agent 210 can control the transparency of the molding part 200. For example, if the diffusion agent 210 is distributed in the molding part 200 at a high ratio, the transparency of the molding part 200 may be lowered, and if the diffusion agent 210 is distributed in a low ratio, the transparency of the molding part 200 may be lowered. ) can increase its transparency.
- This diffusion agent 210 may include one or more of titanium dioxide (TiO 2 ) and silicon dioxide (SiO 2 ), which have high light reflectance. Additionally, the diffusion agent 210 may be provided in plural pieces and may be uniformly or non-uniformly distributed within the molding portion 200. Therefore, clearer contrast is possible.
- the upper surface of the molding part 200 may be roughened to have a predetermined roughness.
- the height difference (d) of roughness may be 10um or less. If the difference in roughness becomes too large, the uniformity of light may deteriorate, so it is preferably 10 um or less.
- the substrate 300 may support the light emitting diode 100 and the molding part 200.
- This substrate 300 may include wiring so that the light emitting diode 100 can be electrically connected.
- the substrate 300 may be a printed circuit board (PCB) or a thin film transistor (TFT).
- This substrate 300 may include a base 310 and substrate electrodes 320, 330, 340, and 350.
- the base 310 may support the first substrate electrode 320, the second substrate electrode 330, the third substrate electrode 340, and the fourth substrate electrode 350.
- This base 310 may be provided in a rectangular shape with a major axis and a minor axis. Alternatively, it may be provided in a square shape with all four sides having the same length.
- the base 310 has at least a portion of each of the top, side, and bottom surfaces connected to the first substrate electrode 320, the second substrate electrode 330, the third substrate electrode 340, and the fourth substrate electrode 350. You can be surrounded.
- This base 310 may have a predetermined thickness and may be connected to an external power source.
- the base 310 may include, for example, one or more of Cu, Zn, Au, Ni, Al, Mg, Cd, Be, W, Mo, Si, and Fe, or an alloy consisting of some of them.
- the base 310 may be extended so that its side surfaces are parallel to the substrate electrodes 320, 330, 340, and 350, and irregularities may be formed non-uniformly.
- at least a portion of the side surface of the base 310 is formed with irregularities, and the irregularities formed on the side surfaces of the base 310 may contact the substrate electrodes 320, 330, 340, and 350.
- the bonding force between the side of the base 310 and the substrate electrodes 320, 330, 340, and 350 may increase.
- the substrate electrodes 320, 330, 340, and 350 are disposed between the light emitting diode 100 and an external substrate (not shown) to electrically connect the light emitting diode 100 and the external substrate. These substrate electrodes 320, 330, 340, and 350 may extend to cover at least a portion of the top, side, and bottom surfaces of the base 310.
- the substrate electrodes 320, 330, 340, and 350 are connected to the base 310 from one surface (e.g., the top surface of FIG. 3) of the base 310 on which the plurality of light emitting diodes 101, 102, and 103 are placed. It may extend to surround the outer surface (eg, the left or right surface of FIG. 3).
- the substrate electrodes 320, 330, 340, and 350 are formed from one side to cover a portion of the other side (e.g., the lower side of FIG. 3), which is the opposite side of the one side of the base 310 on which the light emitting diode 100 is placed. It may extend through the outer surface to the other surface. Additionally, a plurality of substrate electrodes 320, 330, 340, and 350 may be provided, and the plurality of substrate electrodes 320, 330, 340, and 350 may be insulated from each other. These plurality of substrate electrodes 320, 330, 340, and 350 may include a first substrate electrode 320, a second substrate electrode 330, a third substrate electrode 340, and a fourth substrate electrode 350. there is.
- the first substrate electrode 320 is connected to the first terminal (E1) of the first light emitting diode 101, the first terminal (E1) of the second light emitting diode 102, and the third light emitting diode (E1). It may be connected to the first terminal (E1) of the diode 103.
- This first substrate electrode 320 may include a first upper pattern 321, a first side pattern 322, and a first lower pattern 323.
- the first upper pattern 321 is connected to the first terminal E1 of the first light emitting diode 101, the first terminal E1 of the second light emitting diode 102, and the first terminal of the third light emitting diode 103 ( E1) can be electrically connected.
- This first upper pattern 321 may be placed on the top of the base 310.
- at least a portion of the first upper pattern 321 may extend between adjacent portions of the plurality of light emitting diodes 101, 102, and 103.
- the first upper pattern 321 may include at least a portion that is bent, and the bent portion may be bent at two or more points.
- the first upper pattern 321 may be bent at one point (P1) and may be bent at another point (P2) that is different from the first point.
- This first upper pattern 321 may include a first pattern connection part 321a, a second pattern connection part 321b, and a third pattern connection part 321c.
- first pattern connecting portion 321a may be connected to the first terminal E1 of the first light emitting diode 101, and the other side may be connected to the second pattern connecting portion 321b.
- This first pattern connection portion 321a may extend to be inclined with respect to the x-axis and y-axis. In other words, the first pattern connection portion 321a may extend in a direction that is different from the orientation of the light emitting diode 100. Additionally, the first pattern connection portion 321a may be disposed between the first light emitting diode 101 and the second light emitting diode 102.
- One side of the second pattern connecting portion 321b may be connected to the first terminal E1 of the second light emitting diode 102, and the other side may be connected to the third pattern connecting portion 321c.
- the first terminal E1 of the second light emitting diode 102 and the first pattern connecting portion 321a may be connected together.
- at least a portion of the second pattern connection portion 321b may be bent, but is not limited to this.
- the first terminal E1 of the second light emitting diode 102 and the third light emitting diode 321b are connected to each other.
- the first terminal (E1) of the diode 103 may be connected in a linear form.
- One side of the third pattern connection portion 321c may be connected to the first terminal E1 of the third light emitting diode 103, and the other side may be connected to the first side pattern 322. At least a portion of the third pattern connection portion 321c may be bent, or may include areas with different widths. This third pattern connection portion 321c may extend parallel to the upper surface of the base 310 and be connected to the first side pattern 322. However, this is only an example, and the third pattern connecting portion 321c may be connected to the first side pattern 322 so that the portion connected to the first side pattern 322 protrudes upward.
- At least one of the plurality of side patterns (322, 332, 342, and 352) is a first region (R1) that is a portion higher in height than the upper patterns (321, 331, 341, and 351). ) may include.
- the first region R1 may have a shape whose width gradually narrows toward the top.
- the first region R1 is disposed higher than the upper patterns 321, 331, 341, and 351, thereby blocking the light generated from the light emitting device 1 from affecting the adjacent light emitting device 1. This can be effective in improving contrast.
- At least one of the plurality of side patterns 322, 332, 342, and 352 may further include a second region R2 that is lower in height than the upper patterns 321, 331, 341, and 351. there is.
- the first side pattern 322 may electrically connect the first upper pattern 321 and the first lower pattern 323. This first side pattern 322 may extend to cover the side surface of the base 310.
- the first lower pattern 323 can electrically connect the light emitting device 1 to an external substrate.
- This first lower pattern 323 has a second lower pattern 333, a third lower pattern 343, and a fourth lower pattern (to be described later) when looking at the base 310 from the side where the lower surface of the base 310 is located. 353) may have an area smaller than that.
- the lower area of the substrate electrode 320 connected to the first terminal (E1) of the plurality of light emitting diodes 100 is the substrate electrodes 330 and 340 connected to the second terminal (E2) of the plurality of light emitting diodes 100. , 350) may be smaller than the lower area.
- the first lower pattern 323 may have a vertical surface 323a extending in a direction perpendicular to the imaginary line G extending diagonally of the base 310.
- the second substrate electrode 330 may be connected to the second terminal (E2) of the first light emitting diode 101.
- This second substrate electrode 330 may include a second upper pattern 331, a second side pattern 332, and a second lower pattern 333.
- One side of the second upper pattern 331 may be connected to the second terminal (E2) of the first light emitting diode 101, and the other side may be connected to the second side pattern 332.
- This second upper pattern 331 may be disposed on the upper part of the base 310. Additionally, at least a portion of the second upper pattern 331 may be bent.
- the second side pattern 332 may electrically connect the second upper pattern 331 and the second lower pattern 333. This second side pattern 332 may extend to cover the side surface of the base 310.
- the second lower pattern 333 may electrically connect the light emitting device 1 to an external substrate. This second lower pattern 333 may be disposed on the lower part of the base 310.
- the third substrate electrode 340 may be connected to the second terminal (E2) of the second light emitting diode 102.
- This third substrate electrode 340 may include a third upper pattern 341, a third side pattern 342, and a third lower pattern 343.
- One side of the third upper pattern 341 may be connected to the second terminal (E2) of the second light emitting diode 102, and the other side may be connected to the third side pattern 342.
- This third upper pattern 341 may be placed on the top of the base 310. Additionally, at least a portion of the third upper pattern 341 may be bent. Meanwhile, the third upper pattern 341 may be arranged to be point symmetrical with respect to the second pattern connection portion 321b of the first upper pattern 321 and the center of the second light emitting diode 102. In other words, when the third upper pattern 341 is rotated around the center of the second light emitting diode 102, it can correspond to the second pattern connection portion 321b.
- the third side pattern 342 may electrically connect the third upper pattern 341 and the third lower pattern 343. This third side pattern 342 may extend to cover the side surface of the base 310.
- the third lower pattern 343 may electrically connect the light emitting device 1 to an external substrate.
- This third lower pattern 343 may be disposed on the lower part of the base 310. Additionally, the third lower pattern 343 may be arranged to be point symmetrical with respect to the centers of the first lower pattern 323 and the base 310.
- the fourth substrate electrode 350 may be connected to the second terminal (E2) of the third light emitting diode 103.
- This fourth substrate electrode 350 may include a fourth upper pattern 351, a fourth side pattern 352, and a fourth lower pattern 353.
- One side of the fourth upper pattern 351 may be connected to the second terminal (E2) of the third light emitting diode 103, and the other side may be connected to the fourth side pattern 352.
- This fourth upper pattern 351 may be disposed on the upper part of the base 310. Additionally, at least a portion of the fourth upper pattern 351 may be bent.
- the fourth side pattern 352 may electrically connect the fourth upper pattern 351 and the fourth lower pattern 353. This fourth side pattern 352 may extend to cover the side surface of the base 310.
- the fourth lower pattern 353 can electrically connect the light emitting device 1 to an external substrate.
- This fourth lower pattern 353 may be disposed on the lower part of the base 310. Additionally, the fourth lower pattern 353 may be arranged to be point symmetrical with respect to the center of the second lower pattern 333 and the base 310.
- the first lower pattern 323, the second lower pattern 333, the third lower pattern 343, and the fourth lower pattern 353 may be provided so that each width is greater than the separation distance between them.
- the width (W) of the fourth lower pattern 353 may be greater than the separation distance (D) between the second lower pattern 333 and the third lower pattern 343 (see FIG. 15). Therefore, an electrically stable connection with the external board is possible, and the lower patterns maintain insulation between each other and provide a sufficient heat dissipation pass.
- the conductive material 400 can fix the light emitting diode 100 to the substrate 300.
- One side of this conductive material 400 is connected to the light emitting diode 100, and the other side is connected to the substrate 300.
- the conductive material 400 may electrically connect the substrate electrodes 320, 330, 340, and 350 of the substrate 300 and the bump electrode 150 of the light emitting diode 100.
- a plurality of such conductive materials 400 may be provided, and the plurality of conductive materials 400 may connect each of the substrate electrodes 320, 330, 340, and 350 and the plurality of light emitting diodes 100.
- the portion where the conductive material 400 is in contact with the substrate electrodes 320, 330, 340, and 350 may be roughened to have a predetermined roughness.
- the molding part 200 may be extended to cover the substrate electrodes 320, 330, 340, and 350.
- a second embodiment of the present invention will be described with further reference to FIGS. 16 and 17.
- the differences compared to the above-described embodiment will be mainly explained, and the same description and reference numerals will be used as reference to the above-described embodiment.
- the molding part 200 may include a first molding part 201 and a second molding part 202.
- the first molding part 201 may cover the light emitting diode 100 to protect the light emitting diode 100.
- This first molding part 201 may be placed on the upper surface of the base 310 and may extend upward from the upper surface of the base 310 to have a predetermined thickness. Additionally, the first molding part 201 may cover the first upper pattern 321, the second upper pattern 331, the third upper pattern 341, and the fourth upper pattern 351.
- the second molding part 202 may extend from the first molding part 201 to cover at least a portion of the substrate electrodes 320, 330, 340, and 350.
- This second molding part 202 is a first molding part 201 to cover the first side pattern 322, the second side pattern 332, the third side pattern 342, and the fourth side pattern 352. It can extend downward from.
- the second molding part 202 may cover the area where at least one of the first to fourth side patterns 322, 332, 342, and 352 is exposed.
- the second molding part 202 may cover at least one pair of side patterns facing each other so that no exposed areas are left.
- the second molding part 202 covers all of the pair of side patterns facing each other, the plurality of light emitting elements 1 arranged adjacently can be arranged in a row without being tilted up and down or left and right. That is, the facing The second molding part 202, which covers a pair of side patterns, serves as a support that can minimize the coupling step between the plurality of light-emitting devices 1 adjacent to each other, thereby allowing the plurality of light-emitting devices 1 to be coupled to the external substrate.
- the plurality of light emitting elements 1 are coupled to the external substrate without a coupling step, the light emitting surfaces of the plurality of light emitting elements 1 are arranged on substantially the same line, and accordingly, It is possible to alleviate the color difference and minimize luminance loss of the light emitted from the plurality of light-emitting devices 1.
- the light emission surfaces of the plurality of light-emitting devices 1 are arranged on substantially the same line, measurement is performed at various angles. It is possible to alleviate the color difference in the light and minimize the loss of luminance.
- At least a portion of the second molding portion 202 includes the first lower pattern 323, the second lower pattern 333, the third lower pattern 343, and the fourth lower pattern 353.
- the first side pattern 322, the second side pattern 332, the third side pattern 342, and the fourth side pattern 352 are exposed to the outside by being covered by the second molding part 202. This prevents stable operation of the device.
- the second molding part 202 includes the first lower pattern 323, the second lower pattern 333, the third lower pattern 343, and the fourth lower pattern 353. It can cover at least part of it.
- the second molding part 202 may cover a portion of the first lower pattern 323 adjacent to the vertex of the lower surface of the base 310.
- the outer surface of the second molding part 202 and the outer surface of the lower patterns 323, 333, 343, and 353 or the outer surfaces of the side patterns 322, 332, 342, and 352 may be formed to be parallel. .
- a portion of the side patterns 322, 332, 342, and 352 is covered by the second molding portion 202, and another portion of the side patterns 322, 332, 342, and 352 is covered by the second molding portion ( 202) can be formed to be exposed.
- the molding portion 200 By covering the corners of the side patterns 322, 332, 342, and 352 with the molding portion 200, when the light emitting device 1 is arrayed as a module, light reflection at the corners is blocked to prevent light scattering according to the viewing angle. It can be resolved.
- a substrate void 111 may be formed inside the light transmitting portion 110.
- the substrate void 111 may refract light passing through the light transmitting portion 110.
- the beam angle of the light emitting structure 120 may increase.
- the beam angle deviation of the first light emitting diode 101, the second light emitting diode 102, and the third light emitting diode 103 may be reduced by the substrate void 111 formed in the light transmitting portion 110.
- the substrate voids 111 may be provided on the side of the light transmitting portion 110 and may be provided in plural numbers. Additionally, the substrate voids 111 may be spaced apart in the vertical direction along the side of the light transmitting portion 110.
- a molding void 220 may be formed between the molding part 200 and the light emitting diode 100.
- the molding void 220 may be provided in an area where the upper surface of the light emitting diode 100 and the molding part 200 contact, and may be provided in plural pieces. Additionally, the plurality of molding voids 220 may refract light emitted from the light emitting diode 100. In this case, the beam angle of light emitted from the light emitting diode 100 may become larger.
- the molding part 200 may be filled between the first terminal E1 and the second terminal E2.
- the conductive material 400 connected to the first terminal (E1) may be spaced apart from the conductive material 400 connected to the second terminal (E2), and the first terminal (E1) and the second terminal (E2) may be separated from each other.
- An empty space may be formed between the two terminals E2.
- the molding part 200 may fill the empty space between the first terminal E1 and the second terminal E2.
- a molding void 220 may be formed in the molding portion 200 filled between the first terminal E1 and the second terminal E2. This molding void 220 may refract light emitted into the space between the first terminal E1 and the second terminal E2.
- a conductive void 410 may be formed in the conductive material 400.
- a conductive void 410 may be formed in the conductive material 400, and this conductive void 410 can easily volatilize the flux contained in the conductive material 400 to the outside. You can. In this case, defects caused by the flux remaining in the conductive material 400 can be improved. For example, the flux remaining in the conductive material 400 has the effect of preventing the conductive material 400 from spreading.
- the conductive material 400 may include a first conductive material portion 401 and a second conductive material portion 402.
- the first conductive material portion 401 may fix the light emitting diode 100 to the substrate 300.
- the first conductive material portion 401 may electrically connect the substrate electrodes 320, 330, 340, and 350 and the bump electrode 150 of the light emitting diode 100.
- the first conductive material portion 401 may reflect light emitted from the light emitting diode 100 downward.
- the second conductive material portion 402 may extend upward from the first conductive material portion 401 and may reflect light emitted from the light emitting diode 100 toward the side.
- the second conductive material portion 402 has one end connected to the first conductive material portion 401, and the other end extends upward from the first conductive material portion 401 so as to face the side of the light emitting diode 100. It may be extended. In this case, the second conductive material portion 402 can improve light efficiency by reflecting light emitted from the light emitting diode 100.
- the molding part 200 includes at least one of a plurality of different color pigments and a plurality of different color dyes. can do.
- One or more of a plurality of different color pigments and a plurality of different color dyes may be mixed and included in the molding part 200.
- the color of the pigment or dye included in the molding part 200 may be white, yellow, green, black, magenta, blue, or purple.
- the molding part 200 may have various colors.
- the molding part 200 may be black.
- the brightness or saturation of the color displayed by the molding portion 200 may be adjusted.
- the transparency of the molding part 200 can be adjusted depending on the concentration of the pigment or dye (D) mixed in the molding part 200.
- the molding part 200 may be a colored molding with a transparency of 20% or more. Accordingly, the molding part 200 can implement a color that matches the user's sensibility. In addition, the molding part 200 containing pigment or dye (D) can improve the color difference of the light emitted from the plurality of light emitting devices 1 and implement uniform color expression of the display device.
- the molding part 200 containing pigment or dye (D) can improve the color difference of the light emitted from the plurality of light emitting devices 1 and implement uniform color expression of the display device.
- the color displayed by the molding part 200 in which at least one type of dye or pigment is mixed may satisfy any one of the three ranges below in the LAB color coordinate system.
- a display device including a plurality of light-emitting modules in which a plurality of light-emitting elements 1 are arrayed can clearly implement various colors. there is. Additionally, color interference between adjacent light emitting devices 1 can be minimized. In addition, discoloration of the molding portion 200 due to light incident from outside the light emitting device 1 or heat generated inside or outside the light emitting device 1 can be minimized, and even if the molding portion 200 is discolored, Color change of the molding portion 200 can be minimized. Additionally, when a plurality of light emitting devices 1 are arrayed, the occurrence of dark lines and bright lines can be minimized.
- the molding part 200 may further include not only the pigment or dye described above, but also a polymer resin and a curing initiator.
- the polymer resin may include one or more of silicone, epoxy, and acrylate.
- the curing initiator may be a thermal curing initiator or an ultraviolet curing initiator.
- the molding part 200 may further include a binder.
- an upper molding 204 may be disposed on the upper surface of the molding part 200.
- Top molding 204 may be molding or film.
- the film includes a pressure sensitive adhesive (PSA) layer, a polyethylene terephthalate (PET) or polyimide layer, an anti-glare layer, It may include one or more low-reflection layers.
- PSA pressure sensitive adhesive
- PET polyethylene terephthalate
- polyimide layer may include one or more of black pigment and dye.
- the film may further include a polarizing layer.
- the upper molding 204 may be formed of multiple layers.
- At least one of the upper moldings 204 formed of a plurality of layers may be an anti-glare layer, that is, an anti-glare layer. Additionally, at least one of the plurality of upper moldings 204 may be a transparent layer. Additionally, at least one surface of the upper molding 204 may have roughness.
- the molding part 200 may further include a diffusion agent 203.
- the dispersant may include one or more of PMMA (polymethylmethacrylate), silica (SiO 2 ), and zirconium dioxide.
- the molding part 200 may further include one or more pigments or dyes (D).
- the horizontal and vertical directions shown in FIGS. 30 and 31 can be defined as follows.
- the vertical direction may be defined as the direction in which the first light emitting diode 101 that emits red light, the second light emitting diode 102 that emits green light, and the third light emitting diode 103 that emits blue light are arranged, and the horizontal direction can be defined as a direction perpendicular to this vertical direction.
- the horizontal color difference ( ⁇ u'v') is the color of the molding part 200 when viewed from the front at different angles from one side of the horizontal direction to the other side of the horizontal direction.
- the difference ( ⁇ u'v') is measured, and in Figures 30 and 31, the vertical color difference ( ⁇ u'v') is the angle viewed from one side of the vertical direction or the other side of the vertical direction centered on when viewed from the front.
- the color difference ( ⁇ u'v') of the molding part 200 when varied was measured.
- the color difference ( ⁇ u'v') according to viewing angle is based on the CIE1976 chromaticity diagram and applied the formula below.
- x, y in the formula below are coordinate (x, y) values of the CIE1931 color coordinate system. You can measure the color change rate ⁇ u'v' compared to a viewing angle of 0 degrees using the measurement results using the formula below.
- the color difference ( ⁇ u'v') according to the viewing angle of the molding part 200 is improved.
- the diffusion agent is included in the molding unit 200, compared to when the diffusion agent is not included, the viewing angle of the molding unit 200 when viewed from the front is changed to one side or the other in the horizontal direction.
- the color difference ( ⁇ u'v') was reduced.
- the diffusion agent is included in the molding part 200, compared to when the diffusion agent is not included, the molding part 200 changes when viewed from the front at a different angle when viewed from one side or the other in the horizontal direction. Color difference ( ⁇ u'v') according to viewing angle was reduced.
- the color difference ( ⁇ u'v') of the molding part 200 may be 0.01 or less in both the horizontal and vertical directions when viewed from the front and when viewed from 45 degrees to one side or the other.
- the color difference ( ⁇ u'v') of the molding part 200 may be 0.03 or less in both the horizontal and vertical directions when viewed from the front and when viewed from 80 degrees to one side or the other.
- the color difference ( ⁇ u'v') according to the viewing angle of the molding part 200 may be 0.005 or less between one side and the other when viewed from the front in both the horizontal and vertical directions.
- the graph of the molding unit 200 forms a nearly linear waveform in an angle range between -80 degrees and +80 degrees, and the average color difference ( ⁇ u'v') in adjacent angle regions can be formed to be 0.003 or less.
- the color difference ( ⁇ u'v') graph according to the viewing angle of the molding part 200 shows that the height difference between the waveforms of adjacent areas in the area between -80 degrees and +80 degrees is 0.005 or less, and the waveforms of adjacent areas are 0.005 or less.
- the peak between may be 0.003 or less.
- the molding part 200 may further include a matting agent.
- the matting agent mixed in the molding part 200 may form irregularities on the surface of the molding part 200.
- the position of the matting agent particles added to the molding part 200 may be distinct from that of the diffusion agent 203.
- the matting agent may be located on the upper surface of the molding portion 200 to form irregularities on the upper surface of the molding portion 200, and the diffusing agent 203 may be located close to the light emitting diode.
- the matting agent may be a material such as silica, wax, or filler.
- the irregularities formed on the surface of the molding part 200 by the matting agent can improve the light extraction efficiency of the light-emitting device 1, and can minimize the occurrence of dark or bright lines when a plurality of light-emitting devices 1 are arrayed. there is. Additionally, glare on the user can be prevented by lowering the reflectivity of the surface of the display device due to external light.
- the dispersing agent may be included in the molding part 200 in an amount of 5% to 20% by weight of the molding part 200. If the dispersant is included in the molding part 200 in an amount of less than 5% by weight of the molding part 200, the color difference may not be improved. In addition, if the dispersant is included in the molding part 200 in an amount exceeding 20% by weight of the molding part 200, the molding part 200 becomes cloudy and affects the color expressed by the molding part 200, thereby affecting the color of the molding part 200. ) may not display the color properly. For example, when the molding part 200 is black, the molding part 200 may not properly display black, which may deteriorate the clarity of the display device.
- the more the diffusion agent is included in the molding part 200 the more the color difference ( ⁇ u'v) according to the viewing angle of the molding part 200. ') can be reduced.
- the color difference ( ⁇ u'v') of the molding part 200 may be 0.01 or less in both the horizontal and vertical directions when viewed from the front and when viewed from 45 degrees to one side or the other.
- the color difference ( ⁇ u'v') of the molding part 200 may be 0.03 or less in both the horizontal and vertical directions when viewed from the front and when viewed from 80 degrees to one side or the other.
- the color difference ( ⁇ u'v') according to the viewing angle of the molding part 200 may be 0.005 or less between one side and the other when viewed from the front in both the horizontal and vertical directions.
- the graph of the color difference ( ⁇ u'v') according to the viewing angle of the molding part 200 forms a nearly linear waveform in the area between -80 degrees and +80 degrees, and the average color difference in adjacent angle areas is 0.003 or less. It can be formed as
- the color difference ( ⁇ u'v') graph according to the viewing angle of the molding part 200 shows that the height difference between the waveforms of adjacent areas in the area between -80 degrees and +80 degrees is 0.005 or less, and the waveforms of adjacent areas are 0.005 or less. The peak between may be 0.003 or less. When these conditions are met, the viewing angle can be relatively uniform. Additionally, light loss can be reduced and light extraction efficiency can be improved. Additionally, the color can be perceived as substantially the same no matter which angle the user looks at.
- the molding part 200 may further include a polymer resin and a curing initiator as well as the above-described pigment or dye and dispersant.
- the polymer resin may include one or more of silicone, epoxy, and acrylate.
- the curing initiator may be a thermal curing initiator or an ultraviolet curing initiator.
- the molding part 200 may further include a binder.
- an upper molding 204 may be disposed on the upper surface of the molding portion 200.
- Top molding 204 may be molding or film.
- the film includes a pressure sensitive adhesive (PSA) layer, a polyethylene terephthalate (PET) or polyimide layer, an anti-glare layer, It may include one or more low-reflection layers.
- PSA pressure sensitive adhesive
- PET polyethylene terephthalate
- polyimide layer may include one or more of black pigment and dye.
- the film may further include a polarizing layer.
- the upper molding 204 may be formed of multiple layers.
- At least one of the upper moldings 204 formed of a plurality of layers may be an anti-glare layer, that is, an anti-glare layer. Additionally, at least one of the plurality of upper moldings 204 may be a transparent layer. Additionally, at least one surface of the upper molding 204 may have roughness.
- the thickness of the molding portion 200 is equal to that of the light emitting diode 100. It may be between two and three times the thickness. Additionally, the pitch may be 2 times or more and 4 times or less the thickness of the molding portion 200.
- the pitch is the distance between the centers of neighboring light emitting devices 1, and the thickness T of the molding part 200 is the distance from the substrate 300 to the upper surface of the molding part 200, referring to FIG. 33. .
- a display device including a plurality of light-emitting modules in which a plurality of light-emitting elements 1 are arrayed can have uniform variation in all colors. Additionally, as the amount of overlapping light between light emitting modules decreases, dark lines or bright lines may not be generated at the boundaries of light emitting modules.
- the color difference ( ⁇ u'v') according to the viewing angle increases as the thickness of the molding portion 200 increases. is reduced.
- the thickness of the molding part is 400 um or more and 500 um or less
- the color difference ( ⁇ u'v') depending on the viewing angle can be more alleviated than when the thickness of the molding part is 350 um or more and 400 um or less.
- the color difference ( ⁇ u'v') depending on the viewing angle can be reduced by increasing the thickness of the molding part 200.
- the color difference ( ⁇ u'v') can be less than 0.01 when viewed from 45 degrees to one side or the other.
- the color difference ( ⁇ u'v') can be 0.01 or less when viewed from 80 degrees to one side or the other.
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Abstract
Description
Claims (20)
- 광을 방출할 수 있는 복수의 발광다이오드;상기 복수의 발광다이오드와 전기적으로 연결된 기판; 및상기 복수의 발광다이오드의 적어도 일면을 덮는 몰딩을 포함하고,상기 복수의 발광다이오드는 적색광을 방출하는 제1 발광다이오드, 녹색광을 방출하는 제2 발광다이오드 및 청색광을 방출하는 제3 발광다이오드를 포함하고,상기 몰딩은 복수개의 서로 다른 색의 안료 및 복수개의 서로 다른 색의 염료 중 하나 이상을 포함하는 발광소자.
- 제 1 항에 있어서,상기 몰딩은 LAB 색좌표계에서 아래의 3개의 범위 중 어느 한 범위를 만족하는 발광소자.제1 범위 : -3 ≤ a'≤ 3, -10 ≤ b'≤ 0제2 범위 : -5 ≤ a'≤ 5, -8 ≤ b'≤ 2제3 범위 : -4 ≤ a'≤ 4, -4 ≤ b'≤ 4
- 제 1 항에 있어서,상기 몰딩은 고분자 수지 및 경화 개시제를 더 포함하는 발광소자.
- 제 1 항에 있어서,상기 몰딩은 상부 몰딩 및 하부 몰딩을 포함하는 발광소자.
- 제 4 항에 있어서,상기 상부 몰딩은 복수의 층으로 형성되며, 상기 상부 몰딩 중 적어도 하나는 투명층인 발광소자.
- 제 1 항에 있어서,상기 몰딩은 확산제를 더 포함하는 발광소자.
- 제 6 항에 있어서,상기 복수의 발광 다이오드 중 적어도 하나로부터 출사 되어 상기 몰딩을 투과한 광은 수평방향 또는 수직방향에서 정면에서 바라보았을 때를 중심으로, 일측 또는 타측으로 45도 각도에서 색감차이가 0.01 이하인 발광소자.
- 제 6 항에 있어서,상기 복수의 발광 다이오드 중 적어도 하나로부터 출사 되어 상기 몰딩을 투과한 광은 수평방향 또는 수직방향에서 정면에서 바라보았을 때를 중심으로, 일측 또는 타측으로 80도 각도에서 색감차이가 0.03 이하인 발광소자.
- 제 6 항에 있어서,상기 복수의 발광 다이오드 중 적어도 하나로부터 출사되어 상기 몰딩층을 투과한 광은 수평방향 또는 수직방향에서 정면에서 바라보았을 때를 중심으로, -80도 내지 +80도 각도의 영역에서 서로 인접한 각도 영역에서의 평균 색감차는 0.003 이하이며, 서로 인접한 영역의 파형의 높이차는 0.005이하인 발광소자.
- 광을 방출할 수 있는 복수의 발광다이오드;상기 복수의 발광다이오드와 전기적으로 연결된 기판; 및상기 복수의 발광다이오드의 적어도 일면을 덮는 몰딩을 포함하고,상기 복수의 발광다이오드는 적색광을 방출하는 제1 발광다이오드, 녹색광을 방출하는 제2 발광다이오드 및 청색광을 방출하는 제3 발광다이오드를 포함하고,상기 몰딩은 적어도 하나의 확산제를 포함하는 발광소자.
- 제 10 항에 있어서,상기 복수의 발광 다이오드 중 적어도 하나로부터 출사 되어 상기 몰딩을 투과한 광은 수평방향 또는 수직방향에서 정면에서 바라보았을 때를 중심으로, 일측 또는 타측으로 45도 각도에서 색감차이가 0.01 이하인 발광소자.
- 제 10 항에 있어서,상기 복수의 발광 다이오드 중 적어도 하나로부터 출사 되어 상기 몰딩을 투과한 광은 수평방향 또는 수직방향에서 정면에서 바라보았을 때를 중심으로, 일측 또는 타측으로 80도 각도에서 색감차이가 0.03 이하인 발광소자.
- 제 10 항에 있어서,상기 복수의 발광 다이오드 중 적어도 하나로부터 출사되어 상기 몰딩층을 투과한 광은 수평방향 또는 수직방향에서 정면에서 바라보았을 때를 중심으로, -80도 내지 +80도 각도의 영역에서 서로 인접한 각도 영역에서의 평균 색감차는 0.003 이하이며, 서로 인접한 영역의 파형의 높이차는 0.005이하인 발광소자.
- 제 10 항에 있어서,상기 확산제는 상기 몰딩의 5 중량% 내지 20 중량%의 양으로 몰딩부에 포함되는 발광소자.
- 제 10 항에 있어서,상기 몰딩의 두께는 상기 발광다이오드의 두께의 2배 이상 3배 이하인 발광소자.
- 제 10 항에 있어서,상기 몰딩은 복수개의 서로 다른 색의 안료 및 복수개의 서로 다른 색의 염료 중 하나 이상을 더 포함하고,상기 몰딩은 LAB 색좌표계에서 아래의 3개의 범위 중 어느 한 범위를 만족하는 발광소자.제1 범위 : -3 ≤ a'≤ 3, -10 ≤ b'≤ 0제2 범위 : -5 ≤ a'≤ 5, -8 ≤ b'≤ 2제3 범위 : -4 ≤ a'≤ 4, -4 ≤ b'≤ 4
- 광을 방출할 수 있는 복수의 발광다이오드;상기 복수의 발광다이오드와 전기적으로 연결된 기판; 및상기 복수의 발광다이오드의 적어도 일면을 덮는 몰딩을 포함하고,상기 복수의 발광다이오드는 적색광을 방출하는 제1 발광다이오드, 녹색광을 방출하는 제2 발광다이오드 및 청색광을 방출하는 제3 발광다이오드를 포함하고,상기 몰딩은 복수개의 서로 다른 색의 안료 및 복수개의 서로 다른 색의 염료 중 하나 이상을 포함하는 디스플레이 장치.
- 제 17 항에 있어서,상기 몰딩은 LAB 색좌표계에서 아래의 3개의 범위 중 어느 한 범위를 만족하는 디스플레이 장치.제1 범위 : -3 ≤ a'≤ 3, -10 ≤ b'≤ 0제2 범위 : -5 ≤ a'≤ 5, -8 ≤ b'≤ 2제3 범위 : -4 ≤ a'≤ 4, -4 ≤ b'≤ 4
- 제 17 항에 있어서,상기 몰딩은 적어도 하나의 확산제를 더 포함하는 디스플레이 장치.
- 제 19 항에 있어서,상기 복수의 발광 다이오드 중 적어도 하나로부터 출사 되어 상기 몰딩을 투과한 광은 수평방향 또는 수직방향에서 정면에서 바라보았을 때를 중심으로, 일측 또는 타측으로 80도 각도에서 색감차이가 0.03 이하인 디스플레이 장치.
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| EP23767108.6A EP4489086A4 (en) | 2022-03-06 | 2023-03-06 | ELECTROLUMINESCENT DEVICE AND DISPLAY APPARATUS |
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| US202263317063P | 2022-03-06 | 2022-03-06 | |
| US63/317,063 | 2022-03-06 | ||
| US202263415996P | 2022-10-14 | 2022-10-14 | |
| US63/415,996 | 2022-10-14 | ||
| US18/116,846 US20230282787A1 (en) | 2022-03-06 | 2023-03-03 | Light emitting device and display apparatus |
| US18/116,846 | 2023-03-03 |
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| WO2023172007A1 true WO2023172007A1 (ko) | 2023-09-14 |
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| KR20060117612A (ko) * | 2005-05-13 | 2006-11-17 | 서울반도체 주식회사 | 발광 다이오드용 캡 및 발광 다이오드 |
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| WO2021256787A1 (ko) * | 2020-06-18 | 2021-12-23 | 서울반도체 주식회사 | 복수의 유닛 픽셀을 갖는 발광 모듈, 그것을 제조하는 방법, 및 그것을 갖는 디스플레이 장치 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3716331B1 (en) * | 2010-12-28 | 2023-06-28 | Nichia Corporation | Light emitting device |
| KR102766461B1 (ko) * | 2018-08-20 | 2025-02-13 | 삼성전자주식회사 | 디스플레이 장치 및 그 제조 방법 |
| JP7372512B2 (ja) * | 2018-09-28 | 2023-11-01 | 日亜化学工業株式会社 | 発光装置および発光装置の製造方法 |
| KR102676868B1 (ko) * | 2018-11-16 | 2024-06-21 | 삼성전자주식회사 | 디스플레이 모듈, 디스플레이 장치 및 디스플레이 장치의 제조 방법 |
-
2023
- 2023-03-03 US US18/116,846 patent/US20230282787A1/en active Pending
- 2023-03-06 WO PCT/KR2023/003048 patent/WO2023172007A1/ko not_active Ceased
- 2023-03-06 EP EP23767108.6A patent/EP4489086A4/en active Pending
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| KR200363141Y1 (ko) * | 2004-06-15 | 2004-09-22 | 삼익전자공업 주식회사 | 안내 표시장치 |
| KR20060117612A (ko) * | 2005-05-13 | 2006-11-17 | 서울반도체 주식회사 | 발광 다이오드용 캡 및 발광 다이오드 |
| KR20150090783A (ko) * | 2014-01-29 | 2015-08-06 | 엘지이노텍 주식회사 | 발광소자 어레이 유닛 |
| KR20160144726A (ko) * | 2015-06-09 | 2016-12-19 | 서울반도체 주식회사 | 고신뢰성 발광 장치 |
| WO2021256787A1 (ko) * | 2020-06-18 | 2021-12-23 | 서울반도체 주식회사 | 복수의 유닛 픽셀을 갖는 발광 모듈, 그것을 제조하는 방법, 및 그것을 갖는 디스플레이 장치 |
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| EP4489086A1 (en) | 2025-01-08 |
| EP4489086A4 (en) | 2026-01-14 |
| US20230282787A1 (en) | 2023-09-07 |
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