WO2012144393A1 - Dispositif d'éclairage et appareil d'éclairage le comportant - Google Patents

Dispositif d'éclairage et appareil d'éclairage le comportant Download PDF

Info

Publication number
WO2012144393A1
WO2012144393A1 PCT/JP2012/059938 JP2012059938W WO2012144393A1 WO 2012144393 A1 WO2012144393 A1 WO 2012144393A1 JP 2012059938 W JP2012059938 W JP 2012059938W WO 2012144393 A1 WO2012144393 A1 WO 2012144393A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
guide plate
light guide
illumination
ceiling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2012/059938
Other languages
English (en)
Japanese (ja)
Inventor
堀山　真
中村　篤
緒方　伸夫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sharp Corp
Original Assignee
Sharp Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sharp Corp filed Critical Sharp Corp
Publication of WO2012144393A1 publication Critical patent/WO2012144393A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/04—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/02—Globes; Bowls; Cover glasses characterised by the shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/0008—Reflectors for light sources providing for indirect lighting
    • F21V7/0016—Reflectors for light sources providing for indirect lighting on lighting devices that also provide for direct lighting, e.g. by means of independent light sources, by splitting of the light beam, by switching between both lighting modes
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0028—Light guide, e.g. taper
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2105/00—Planar light sources
    • F21Y2105/10—Planar light sources comprising a two-dimensional [2D] array of point-like light-generating elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0018—Redirecting means on the surface of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources

Definitions

  • the present invention relates to an illumination device that emits light from a light source in a planar shape by a light guide plate, and an illumination device including the illumination device.
  • an LED Light ⁇ ⁇ Emitting ⁇ ⁇ Diode: light emitting diode
  • the LED lighting requires less power to produce the same brightness as the conventional incandescent lighting.
  • the low power consumption is characterized by the fact that less heat is generated for the power that has been lost as heat in the prior art, and the lighting apparatus has a low heat generation.
  • Patent Literature 1 discloses a lighting fixture that can illuminate a ceiling surface by emitting light toward the side and back of the fixture body using LEDs.
  • the lighting fixture 100 disclosed in Patent Document 1 is a ceiling-mounted ceiling light for home use. As shown in FIGS. 14A and 14B, the fixture main body 110 and the fixture main body 110 are provided. A translucent cover 101 that covers the front and side surfaces, and a light control body 102 that emits light from the peripheral edge portion 101a of the translucent cover 101 toward the side and back of the instrument main body 110 are provided.
  • the appliance main body 110 includes a light emitting module 120 having a plurality of LEDs and a lighting device 111 that lights the LEDs. As shown in FIGS. 14C and 14D, the light emitting module 120 is yellow excited by a base 121, a plurality of LED chips 122a mounted on the base 121, and the LED chips 122a. And a semiconductor light emitting element 122 configured to emit white light with high luminance and high output.
  • Patent Document 2 a technique used for a backlight of a liquid crystal display device is disclosed in Patent Document 2.
  • the backlight 200 for a display device disclosed in Patent Document 2 is provided with a light emitting diode 201 below the light guide plate 210 so that its optical axis is orthogonal to the light guide plate 210. . Then, immediately above the light emitting diode 201 on the surface of the light guide plate 210, curved reflecting surfaces 211 and 211 are formed so as to reflect light from the light emitting diode 201 toward both ends of the light guide plate 210. A reflective sheet 202 is provided below the light emitting diode 201.
  • the number of the light-emitting diodes 201 can be reduced because the light-emitting diodes 201 need only be arranged on the center line of the light guide plate 210.
  • Patent Document 3 discloses a lighting fixture including a ceiling light that performs planar irradiation by a combination of a linear light source and a mirror.
  • a lighting fixture including a ceiling light that performs planar irradiation by a combination of a linear light source and a mirror.
  • light is emitted from a light source provided at an outer edge portion of the instrument body toward a curved mirror on the center side, and is reflected by reflecting the light.
  • Japanese Patent Publication Japanese Patent Laid-Open No. 2010-140797 (published on June 24, 2010)” Japanese Patent Publication “Japanese Patent Laid-Open No. 2006-49324 (Released on February 16, 2006)” Japanese Patent Publication “Japanese Unexamined Patent Publication No. 2009-9898 (published on January 15, 2009)”
  • the light guide plate 210 must be formed with reflecting surfaces 211 and 211 having curved surfaces. Therefore, since the light guide plate 210 has to be processed, the cost increases, and in particular, the processing of the large light guide plate has a problem that the area is large and difficult.
  • the amount of light emitted to the liquid crystal panel side is too large immediately above the light emitting diode 201 in the light guide plate 210, so that the entire light guide plate is uniformly irradiated. Has the problem of being difficult.
  • the illumination device disclosed in Patent Document 3 has a problem that the thickness of the device increases due to the use of a curved mirror.
  • the present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide an illumination device that enables uniform irradiation over the entire light guide plate without increasing the number of light sources and processing the light guide plate. And providing a lighting device including the same.
  • the illumination device of the present invention includes a flat light guide plate and a light source disposed on the back side of the light guide plate, and the light emitted from the light source is incident on the light guide plate. And illuminating the incident light from at least the front surface side of the light guide plate while totally reflecting and guiding the light inside the light guide plate, An optical coupling member that couples light emitted from the light source so that light is incident obliquely on the light guide plate is provided between the light guide plate and the light source, and An irradiation direction control unit for controlling the direction of light emitted from the outer peripheral end of the light guide plate is provided at the outer peripheral end of the light guide plate.
  • the light source and the optical coupling member are disposed on the back side of the flat light guide plate, and the optical coupling member transmits the light emitted from the light source to the flat light guide plate.
  • the light is combined so that it is incident obliquely.
  • the light emitted from the light source arranged on the back side of the light guide plate is coupled to the light guide plate through the optical coupling member and is incident obliquely, and the end of the light guide plate is totally reflected inside the light guide plate.
  • the total reflection condition is broken by the optical path conversion element, and the light is irradiated from the surface side of the light guide plate.
  • the backlight is directly under the light guide plate, so that the frame size can be reduced.
  • the gap between the light source and the light guide plate for avoiding the thermal expansion required in the side edge type light guide plate is not required, the coupling efficiency from the light source to the light guide plate is increased and the light utilization efficiency is improved. be able to.
  • the present invention by providing a light coupling member separate from the light guide plate, light is incident on the flat light guide plate at an angle, so that the incident light is guided while being totally reflected inside the light guide plate. Lighted. As a result, the incident light from the light source can be guided inside the light guide plate via the optical coupling member without processing the light guide plate.
  • an illuminating device that can improve the light use efficiency by increasing the coupling efficiency from the light source to the light guide plate without processing the light guide plate.
  • an irradiation direction control unit that controls the direction of light emitted from the outer peripheral end portion of the light guide plate is provided at the outer peripheral end portion of the light guide plate. Moreover, at least a part of the controlled light can be irradiated to the back side of the light guide plate. If the illuminating device of this invention is used, both the space illumination as direct illumination and the ceiling illumination as indirect illumination can be implement
  • the present invention has an effect of providing an illumination device that improves the light use efficiency by increasing the coupling efficiency from the light source to the light guide plate without processing the light guide plate. Furthermore, the present invention controls the irradiation direction of the light incident on the light guide plate, and the irradiation direction control unit capable of irradiating a part of the light to the back side of the light guide plate is provided at the outer peripheral end portion. Both spatial lighting and ceiling lighting as indirect lighting can be realized simultaneously.
  • FIG. 1 is a cross-sectional view illustrating a configuration of a main part of a lighting device in a ceiling light as a lighting device according to an embodiment of a lighting device including a lighting device according to the present invention.
  • (A) is a perspective view from the surface side which shows the structure of the said ceiling light
  • (b) is a perspective view from the back surface side which shows the structure of the said ceiling light. It is a perspective view which shows the structure of the light source module in the said illuminating device.
  • (A) is sectional drawing which shows the optical path when the light radiate
  • (b) is principal part sectional drawing which shows the optical path near LED. It is.
  • (A) is sectional drawing which shows the optical path when the light radiate
  • (b) is principal part sectional drawing which shows the optical path of LED vicinity. is there.
  • (A) is sectional drawing which shows the optical path when the light radiate
  • (B) is a perspective view which shows the strip
  • (A) is a top view which shows the said light-guide plate
  • (b) is a graph which shows the luminance distribution on the string which passes on the point A * B of (a).
  • (A) shows the structure of the modification of the said light-guide plate, Comprising: It is a top view which shows a rectangular light-guide plate, (b) is a top view which shows the light-guide plate which chamfered the rectangular corner
  • FIG. 6D is a plan view showing the configuration of the illumination device in the illumination device. It is a cross section which shows the structure of the backlight applied to the conventional liquid crystal display device.
  • FIGS. 1 to 13 An embodiment of the present invention will be described with reference to FIGS. 1 to 13 as follows.
  • FIG. 1 is a cross-sectional view showing a configuration of a main part of a lighting device in a ceiling light.
  • FIG. 2A is a perspective view showing the configuration of the ceiling light from the front side
  • FIG. FIG. 3 is a perspective view from the back side showing the configuration of the ceiling light
  • FIG. 3 is a perspective view from the front side showing the configuration of the light source module.
  • the “front surface” direction is the direction of the light irradiation surface in the lighting device of the present invention
  • the “back surface” direction is the opposite direction
  • the “side surface” direction is The direction is orthogonal to both the front surface direction and the back surface direction. That is, when the lighting device of the present invention is installed as a ceiling light on the ceiling, the “front surface” is the room (floor) side, and the “back surface” is the ceiling side.
  • the ceiling light 1 includes, for example, a disk-shaped lighting device 10, and the disk-shaped lighting device 10 includes a frame 20 on the outer periphery thereof.
  • a light source module 30 is provided on the diameter of the disk as shown in FIG.
  • the diameter of the ceiling light 1 is, for example, 550 mm, and the thinnest part is, for example, 10 mm.
  • the shape and each dimension of the ceiling light 1 it is not restricted to this.
  • the illuminating device 10 of the ceiling light 1 includes a diffusion sheet 11, an air layer 12, a light guide plate 13, and a light source module 30 provided in this order from the surface side as shown in FIG. 1.
  • a portion of the back surface of the light guide plate 13 where the light source module 30 is not provided is provided with a reflection sheet 14 and a back chassis 15 that are openings.
  • the light source module 30 is provided with a sheet-like heat sink 32 on a light source holder 31 formed in a strip shape.
  • a light source for example, an LED as a light source is provided.
  • LED substrates 34a and 34b on which light emitting portions 33a and 33b (see FIG. 1) composed of a chip and a phosphor are mounted are provided.
  • Spacers 36a and 36b are formed on the LED boards 34a and 34b to provide a gap between the LED boards 34a and 34b and the optical coupling member 35 described later.
  • the present invention is not limited to this, and the light emitting units 33a and 33b may be in close contact with the optical coupling member 35 as long as the light emitting units 33a and 33b are not damaged. Since the semiconductor light emitting part has a very fine size, the description of the light emitting part is omitted in FIG. 3 in order to prevent the drawing from being complicated. Moreover, in this Embodiment, although the light emission parts 33a * 33b are used as a light source, it is not necessarily this, For example, it is also possible to use an organic EL light emitting element or an inorganic EL light emitting element.
  • the light emitting units 33a and 33b are a combination of a blue LED chip and a yellow phosphor, a combination of a blue LED chip, a red phosphor and a green phosphor, a blue LED chip, a red LED chip and a green LED. It is composed of a combination of chips, an organic EL element, and the like. Further, the light emitting sections 33a and 33b emit light having a color temperature of 2000K to 6000K. That is, red light in the morning sun or sunset has a color temperature of about 2000K, and sunlight has a color temperature of about 5000K to 6000K. Note that, as a light source used in a backlight of a liquid crystal display device, for example, a light emitting unit having a color temperature of 10,000 K to 20000 K is used.
  • a plurality of the light emitting portions 33a and 33b are provided in parallel in two rows, and an optical coupling member 35 is provided above the light emitting portions 33a and 33b.
  • the ceiling light 1 of the present embodiment includes a light guide plate 13 that irradiates light on the surface side, a light coupling member 35 as an optical element that couples light to the light guide plate 13, and the above
  • the light coupling member 35 includes light emitting portions 33a and 33b that emit incident light, and the light guide plate 13, the light coupling member 35, and the light emitting portions 33a and 33b are arranged in this order from the front surface side to the back surface side of the lighting device 10. It consists of what is arranged. Therefore, the illuminating device 10 in the ceiling light 1 of the present embodiment is a illuminating device 10 directly under the light source in which the light emitting portions 33 a and 33 b are provided on the back side of the light guide plate 13.
  • the optical coupling member 35 has a substantially semi-cylindrical cross section provided between the light guide plate 13 and the light emitting portions 33a and 33b.
  • the belt-shaped body specifically, a rod-shaped body having a substantially U-shaped cross section.
  • the material of the optical coupling member 35 is made of the same resin as that of the light guide plate 13. If the same material is used, the refractive index can be made the same, so that light is smoothly incident on the light guide plate 13 from the optical coupling member 35.
  • the refractive index of the light guide plate 13 may be slightly higher than the refractive index of the optical coupling member 35.
  • the material is not limited to resin, and a material such as glass may be used.
  • the coupling efficiency to the optical coupling member 35 can be improved.
  • the optical coupling member 35 has a top flat surface 35a that abuts the flat light guide plate 13 on the surface of the optical coupling member 35 on the light guide plate 13 side.
  • the top flat surface 35a has curved surfaces 35b and 35c on both ends.
  • the curved surfaces 35b and 35c can be, for example, a cross-sectional parabola shown in FIG.
  • the present invention is not necessarily limited to this, and as shown in FIGS. 5A to 5B, it may be an ellipse in cross section.
  • from a curved shape such as an arc shape or from the top flat surface 35a. Even if it is a plane which inclines diagonally, it does not matter as long as it can effectively couple light to the light guide plate.
  • the surface of the optical coupling member 35 opposite to the light guide plate 13 side, that is, the lower end of the optical coupling member 35 is a lower flat surface 35d as shown in FIG.
  • the spacers 36a and 36b described above are formed, and serve as spacers that prevent the light emitting portions 33a and 33b and the optical coupling member 35 from colliding with each other.
  • the light emitting portions 33a and 33b are bonded to the LED substrates 34a and 34b, respectively.
  • the spacers 36a and 36b are adhesively fixed to the LED boards 34a and 34b by applying an adhesive or the like.
  • the light emitting portions 33a and 33b have a slight gap between them and the optical coupling member 35.
  • the present invention is not limited to this, and the light emitting portions 33a and 33b are not limited thereto.
  • the light emitting sections 33a and 33b may be in close contact with the optical coupling member 35 as long as the range does not damage 33b.
  • a concave portion 35e is formed in the central portion on the lower end side of the optical coupling member 35.
  • the configuration is not limited to this, and the concave portion 35e may not be present, and the optical coupling member 35 may have a substantially semicircular cross section. That is, in the present embodiment, it is only necessary to secure an optical path to the light guide plate 13 for the light reflected by the curved surfaces 35b and 35c. Therefore, a portion that does not become the optical path can be cut out as a recess 35e. Thereby, cost reduction and weight reduction can be achieved. It is also possible to provide a reflection means such as a reflection sheet (not shown) in the recess 35e. Thereby, even if stray light may be generated in the vicinity of the top flat surface 35a, a part of the stray light can be reflected to the light guide plate 13 side to improve irradiation on the surface side.
  • Light emitting portions 33a and 33b are provided close to the optical coupling member 35 on the lower side (back side) of the lower flat surfaces 35d and 35d of the optical coupling member 35, respectively. As shown in FIGS. 4B and 5B, these light emitting portions 33a and 33b are arranged on the end side (side surface side) with respect to the focal position F of the curved surfaces 35b and 35c having a cross-section parabola or a cross-section ellipse. It is preferable that it exists in. Thereby, for example, as shown in FIG.
  • light emitted from the light emitting portion 33 a is reflected by the curved surface 35 b of the parabolic parabola of the optical coupling member 35, and the reflected light is reflected by the optical coupling member 35. It reaches the top flat surface 35a, and enters the light guide plate 13 obliquely while maintaining the arrival direction. Then, the light incident on the light guide plate 13 is reflected by the inside of the right side of the light guide plate 13 shown in FIG. The angle of traveling through the light guide plate 13 is changed by colliding with a light scatterer, and the total reflection condition is broken, the light is emitted from the light guide plate 13, reflected by the reflection sheet 14, and further passed through the light guide plate 13.
  • FIG. 6A schematically shows a state in which light from the left and right light emitting portions 33a and 33b passes through the optical coupling member 35, enters the light guide plate 13, and is totally reflected and propagated therein. It is.
  • Such an optical path is the same in the optical coupling member 35 having an elliptical cross section shown in FIGS.
  • the cross-sectional ellipse can be coupled so that the light is focused and incident on the light guide plate 13, so that the coupling efficiency can be increased.
  • the strip-shaped light source module 30 is crossed over the central portion of the disc-shaped ceiling light 1, that is, the center line.
  • FIG. 7 (a) the chord passing through the points A and B, which are ⁇ 1/3 of the radius in the X-axis direction from the center of the light guide plate 13, as shown in FIG. Light emitted from the light guide plate 13 having the luminance distribution shown can be obtained.
  • the ceiling light 1 of the present embodiment can obtain a uniform and smooth luminance distribution.
  • the light P emitted from the light source module 30 provided on the center line reaches the outer peripheral end 13a.
  • the light guide plate 13 of the present embodiment is made of, for example, an acrylic plate
  • the radial direction (normal direction to the tangent line Q) at the outer peripheral end 13a is orthogonal to the light source module 30 according to Snell's law.
  • the angle ⁇ formed by the direction is divided into a region S1 that is not totally reflected and regions S2 and S2 that are totally reflected with a boundary of about 42 degrees.
  • the region S1 that is not totally reflected is a central side portion of the diameter, and the regions S2 and S2 that are totally reflected are both side portions of the diameter. For this reason, in the present embodiment, the brightness of the entire light guide plate 13 is further uniformed by adjusting the arrangement pattern of the light scattering portion which is an optical path conversion element (not shown).
  • the illuminating device 10 of this Embodiment As shown in FIG. 1, the light of light emission part 33a * 33b is entered from the back surface side of the light-guide plate 13. As shown in FIG.
  • a side edge type backlight has been conventionally used.
  • the light utilization efficiency of the conventional side edge type backlight is 75%.
  • the light use efficiency of the lighting apparatus 10 of the present embodiment was 88%.
  • the illuminating device 10 of this Embodiment is excellent in light utilization efficiency rather than the conventional side edge type
  • the linear expansion accompanying the temperature rise in the longitudinal direction of the light guide plate is large, it is necessary to provide a gap between the light emitting unit and the light guide plate. Since the emitted light from the light leaks from this gap, the light utilization efficiency could not be increased.
  • the light emitting portions 33a and 33b are provided immediately below the light guide plate 13, the expansion dimension is small even when the light guide plate 13 is thermally expanded. Therefore, since it is not necessary to provide a gap, the light utilization efficiency can be increased.
  • the illumination device 10 of the present embodiment unlike the conventional side-edge type backlight, there is no light source at the end of the ceiling light 1 as shown in FIG. It is possible to provide the frame 20 directly at the end of the frame. As a result, surface light emission with a frame size of 6 mm or less is possible. Further, by forming the frame 20 from a transparent, translucent or milky white resin material, it is possible to emit light from the entire surface including the frame 20. By optimizing the shape and material of the frame 20, indirect illumination that emits light in the back surface direction is possible.
  • the illumination device 10 has a disk shape, for example.
  • the present invention is not limited to this, and various shapes may be used as shown in FIGS. 9 (a) to 9 (d). it can.
  • FIG. 9A shows a rectangular light guide plate 13
  • FIG. 9B shows a light guide plate 13 with rectangular corners chamfered
  • FIG. 9C shows an elliptical guide
  • FIG. 9D shows a light guide plate 13 which is a diamond-shaped light guide plate 13.
  • the amount of light in the light guide direction of the light from the light source module 30, that is, the direction orthogonal to the light source module 30 extending in a strip shape (traveling direction) is Decrease gradually.
  • the distribution of the dot pattern of the light scattering portion can obtain a uniform luminance distribution from the light guide plate 13 to the surface side by increasing the number of dot patterns as it goes in the traveling direction.
  • the amount of light is constant, and as a result, the distribution of the dot pattern of the light scattering portion is also uniform.
  • the rectangular portion is the same as FIG. That is, the amount of light gradually decreases in the light guide direction (traveling direction) of light from the light source module 30. For this reason, the distribution of the dot pattern of the light scattering portion can obtain a uniform luminance distribution from the light guide plate 13 to the surface side by increasing the number of dot patterns as it goes in the traveling direction. In the direction perpendicular to the light guide direction (vertical direction), the amount of light is constant, and as a result, the dot pattern distribution in the light scattering portion is also uniform.
  • the light quantity gradually decreases in the light guide direction (traveling direction) of the light from the light source module 30.
  • the distribution of the dot pattern of the light scattering portion can obtain a uniform luminance distribution from the light guide plate 13 to the surface side by increasing the number of dot patterns as it goes in the traveling direction.
  • the light is totally reflected.
  • the light proceeds in the vertical direction. Accordingly, it is necessary to reduce the dot pattern of the light scattering portion.
  • the light quantity gradually decreases in the light guide direction (traveling direction) of the light from the light source module 30.
  • the distribution of the dot pattern of the light scattering portion can obtain a uniform luminance distribution from the light guide plate 13 to the surface side by increasing the number of dot patterns as it goes in the traveling direction.
  • the light is totally reflected.
  • the light proceeds in the vertical direction. Accordingly, it is necessary to reduce the dot pattern of the light scattering portion.
  • the light source module 30 of the illuminating device 10 is provided in strip
  • it can be a ring shape that is a frame shape.
  • the frame-shaped light source module 30 that follows the shape of the illumination device 10, it is possible to easily achieve uniform luminance.
  • the light source module 30 is provided with two rows of light emitting portions 33a and 33b along the longitudinal direction of the optical coupling member 35. Therefore, by adjusting the color temperatures of the light emitting sections 33a and 33b in the two rows, as shown in FIG. 11, dimming and toning illumination can be performed.
  • the light emitting unit 33a is daylight white and the light emitting unit 33b is a light bulb color. Thereby, it is possible to perform dimming and toning illumination such as irradiating daylight white light outside the ceiling light 1 and illuminating a light bulb color inside the ceiling light 1.
  • the light source modules 30 are provided in one row, but the present invention is not necessarily limited to this, and a plurality of rows may be provided. Thereby, improvement in brightness and dimming illumination are possible.
  • the light emitting sections 33 a and 33 b are arranged so that the optical axis direction of the emitted light toward the optical coupling member 35 is orthogonal to the light guide plate 13. For this reason, since it is not necessary to arrange the light emitting portions 33a and 33b obliquely with respect to the flat light guide plate 13, the light emitting portions 33a and 33b can be easily arranged and the structure is simple.
  • the light emitting units 33a and 33b emit light having a color temperature of 2000K to 6000K. For this reason, it can be appropriately used as an illumination device such as the ceiling light 1.
  • the illuminating device 10 that can uniformly irradiate the entire light guide plate 13 without increasing the number of the light emitting portions 33a and 33b and processing the light guide plate.
  • the light guide plate 13 is not processed and light is incident from below, so that the light guide plate 13 and the ceiling light 1 can be thinned. Specifically, a certain amount of thickness is required for processing the light guide plate 13. In this case, for example, when an edge light type light guide plate is considered, if the light guide plate 13 is made thinner than the widths of the light emitting portions 33a and 33b, the optical coupling rate is lowered, so that there is a limit to thinning. In this regard, in the present embodiment, if the light guide plate 13 is thinned, the ceiling light 1 is thinned. Moreover, since the material of the light guide plate 13 can be saved, the cost can be reduced.
  • the light emitting portions 33a and 33b may be mounted so that the optical axis thereof is perpendicular to the light guide plate 13, the assembly is simple. That is, in the case of the conventional edge light, since it is necessary to attach the light emitting parts 33a and 33b from the side surfaces, the manufacture becomes somewhat difficult.
  • the optical coupling member 35 is provided in a band shape.
  • the optical coupling member 35 may be a double row. In this case, in particular, it is preferable to arrange them symmetrically with respect to the vertical or horizontal center line of the light guide plate 13 so that the luminance distribution of the double-row optical coupling members 35 is symmetrical. Further, when the optical coupling members 35 are in a double row, the luminance of light emitted from the surface of the light guide plate 13 is such that the luminance at the center of the flat light guide plate 13 is higher than the luminance at the end of the light guide plate 13. It is desirable to arrange in.
  • the optical coupling member 35 is provided on the center line in the vertical or horizontal direction of the flat light guide plate 13. This makes it possible to make the luminance symmetric about the vertical or horizontal center line of the light guide plate 13 as an axis. Therefore, it is possible to provide the lighting device 10 suitable for the luminance distribution.
  • the light source includes a plurality of light emitting units 33a and 33b.
  • the light emitting units 33a and 33b have lower power consumption and lower heat generation than incandescent bulbs, and can save energy.
  • the ceiling light 1 as the lighting fixture of the present embodiment includes a lighting device 10.
  • the ceiling light 1 provided with the illuminating device 10 which enables uniform irradiation in the whole light-guide plate 13 without the increase in the number of light emission parts 33a * 33b and the process of the light-guide plate 13 can be provided. .
  • a back chassis 15 that is a flat chassis that holds the light guide plate 13 in a flat surface is provided below the light guide plate 13, and the back chassis 15 is guided.
  • the optical plate holding surface has an opening at a portion where the optical coupling member 35 contacts the light guide plate 13, and the optical coupling member 35 and the light emitting portions 33 a and 33 b are positioned below the light guide plate holding surface of the back chassis 15. Yes.
  • the optical coupling member 35 and the light emitting portions 33a and 33b protrude on the back surface side of the light guide plate 13. Accordingly, it is possible to reduce the thickness of portions other than the optical coupling member 35 and the light emitting portions 33a and 33b. For this reason, the overall thickness can be reduced. Further, by adopting such a configuration, the heat radiation of the light emitting portions 33a and 33b is excellent. Moreover, since the back chassis 15 functions as a heat sink by connecting the light source module 30 to the back chassis 15, high heat dissipation performance can be obtained. As a result, the light emission efficiency of the light emitting units 33a and 33b is also improved.
  • the light emitting portions 33 a and 33 b are arranged in two rows along the longitudinal direction of the optical coupling member 35. Specifically, the light emitting units 33a and 33b are provided in two rows in parallel along the center line directly below both ends of the lower end chord in the optical coupling member 35 having a semicircular cross section.
  • the light emitting portions 33a and 33b of the two rows emit light in opposite directions, so that the line passing through the midpoint between the two rows is axially symmetric and both sides of the optical coupling member 35 That is, the light can be guided to both ends of the light guide plate 13.
  • the line passing through the midpoint between the two rows coincides with the center line of the light guide plate 13
  • the light guide plate is guided to both ends of the light guide plate with the center line of the light guide plate 13 being axially symmetrical.
  • a luminance distribution that is axially symmetric about the 13 center lines can be obtained. Therefore, the luminance distribution can be made uniform in the light guide plate 13 with a simple structure. That is, when the light emitting part 33a is used alone, there is a possibility that the light above the light emitting part 33a does not transmit light and becomes a dark part. This can be supplemented with light from the other light emitting section 33b.
  • the backlight 200 for a display device disclosed in Patent Document 2 has a problem that the luminance directly above the light emitting diode 201 becomes brighter than the surroundings and bright lines are generated, so that a uniform luminance distribution cannot be created.
  • this problem can be solved in the present embodiment.
  • the illumination device 10 of the present embodiment can be applied to a large planar light source as it is, and can provide a large ceiling light 1. Furthermore, since no member is required around the light guide plate 13, it can be applied to a larger ceiling light 1 by arranging them seamlessly.
  • a light source is disposed around the light guide plate, and light incident on the light guide plate from the side surface of the light guide plate is taken out from the liquid crystal panel side (surface side).
  • the end portion (outer peripheral edge portion) of the lighting device is used as a light incident portion.
  • the illumination device 10 of the present embodiment unlike a conventional side-edge type backlight, there is no light source at the end of the ceiling light 1, so that light can be extracted from the end of the ceiling light 1.
  • the direction of the light can be controlled to irradiate at least a part of the light to the back side of the light guide plate 13.
  • An irradiation direction control unit is provided at the outer peripheral edge. In the illumination device 10 of the present embodiment, the irradiation direction control unit is configured by the frame 20.
  • the frame 20 provided on the outer periphery is formed of a resin (such as acrylic resin or polycarbonate) and is provided as a light transmissive member.
  • a resin such as acrylic resin or polycarbonate
  • the light incident on the light guide plate 13 is emitted from the surface side of the light guide plate 13 and becomes direct illumination light in the middle of traveling while being totally reflected inside the light guide plate 13.
  • the frame 20 has a function of controlling light emitted from the outer peripheral end of the light guide plate 13 and using it as indirect illumination light such as ceiling illumination. Note that it is not necessary that all of the light controlled by the frame 20 is irradiated to the ceiling side to become indirect illumination light, and some light may be irradiated from the lighting device 10 to the indoor side.
  • FIG. 12A shows the configuration of the outer peripheral edge of the lighting device of the present embodiment.
  • the frame 20 has a U-shaped cross section so as to contact both the front surface of the diffusion sheet 11 and the back surface of the back chassis 15.
  • the frame 20 is formed with a protrusion (first protrusion) 20 ⁇ / b> A that contacts the surface of the diffusion sheet 11 and a protrusion (second protrusion) 20 ⁇ / b> B that contacts the back surface of the back chassis 15.
  • the protruding portion 20 ⁇ / b> A is disposed in parallel with the light guide plate 13 on the front surface side of the light guide plate 13, and the protruding portion 20 ⁇ / b> B is disposed in parallel with the light guide plate 13 on the back surface side of the light guide plate 13.
  • the light emitted from the outer peripheral end of the light guide plate 13 and incident on the frame 20 is guided in the frame 20 and emitted not only in the side surface direction but also in the back surface direction, and used as indirect illumination light.
  • the frame 20 performs light control so that light is guided inside and becomes indirect illumination light.
  • the frame 20 is required to have a light transmission property, but it is not preferable to use a member having a very high transparency (low light diffusion property), and preferably has a certain degree of light diffusion property. .
  • the frame 20 is made of a member having low transparency, so that it is possible to obtain a blinding effect in which the end portions of the diffusion sheet 11, the light guide plate 13 and the like are hardly visible.
  • the frame 20 may be colored, for example, milky white. If the frame 20 is colored in this way, the blinding effect can be further enhanced. Further, the surface of the frame 20 may be blasted. By blasting the surface of the frame, it is possible to scatter light transmitted and guided through the frame and change the light distribution applied to the ceiling.
  • a partially transmissive reflecting member 21 such as a half mirror is provided between the light guide plate 13 and the frame 20.
  • a partially transmissive reflecting member 21 such as a half mirror is provided between the light guide plate 13 and the frame 20.
  • a part of the light emitted from the outer peripheral end of the light guide plate 13 is transmitted and can be used as indirect illumination light, and a part of the light is reflected to the light guide plate 13 side and used as direct illumination light. Can do.
  • the light reflected by the partially transmitting / reflecting member 21 contributes to an increase in luminance in the peripheral area of the direct illumination light, so that the unevenness of the direct illumination light can be reduced.
  • the lighting device 10 shown in FIG. 12C has a configuration in which a reflecting member 22 is formed on the surface side of the frame 20.
  • the reflection member 22 may be formed by, for example, direct plating on the resin surface of the frame 20, or a reflection plate in which a metal plate such as aluminum or SUS is plated and this is attached to the frame 20. May be attached.
  • As the plating nickel plating or chrome plating can be preferably used.
  • the reflection member 22 reflects the light guided to the indoor side of the frame 20 and can increase the amount of light irradiated to the ceiling side. That is, indirect illumination light to the ceiling can be increased. For this reason, it is preferable that the reflection member 22 is disposed so as to be parallel to the light guide plate 13. Moreover, the reflection member 22 should just be a reflective surface only in a contact surface with the flame
  • the lengths of the protrusions 20A and 20B formed on the frame 20 need not be the same.
  • the lighting device 10 shown in FIG. 12D is formed so that the protruding portion 20A ⁇ the protruding portion 20B, and the amount of light taken out on the ceiling side can be made larger than the amount of light taken out indoors.
  • the lighting device 10 shown in FIG. 12E is formed so that the protruding portion 20A> the protruding portion 20B, and the amount of light taken out indoors can be made larger than the amount of light taken out from the ceiling. .
  • the diffusion sheet 11 is not attached to the light guide plate 13, and an air layer 12 is provided between the diffusion sheet 11 and the light guide plate 13. It has been. Thereby, the light radiate
  • the light guide plate 13 is formed with the dot pattern of the light scattering portion, but the presence of the air layer 12 can prevent the dot pattern from being visually recognized from the surface side.
  • the protruding portion 20 ⁇ / b> A in the frame 20 also has a function of supporting the gap between the diffusion sheet 11 that is not attached to the light guide plate 13 and the air layer 12.
  • the frame 20 has a U-shaped cross section including the protrusions 20A and 20B.
  • the illumination device of the present invention is limited to this.
  • the frame 20 may have an L-shaped cross section including only the protruding portion 20 ⁇ / b> A. That is, the frame 20 can obtain indirect illumination light for illuminating the ceiling if the frame 20 has a portion that can guide light to the ceiling side of the light guide plate 13.
  • the irradiation direction control unit that irradiates in a direction different from the irradiation direction on the surface of the light guide plate 13 is configured on the outer peripheral edge. Therefore, it can be said that the irradiation direction control unit only needs to be configured by the frame 20 that guides and emits light toward the ceiling. By having such a configuration, a ceiling light that simultaneously realizes both space illumination as direct illumination and ceiling illumination as indirect illumination is provided.
  • the reflection sheet 14 is not particularly limited as long as it has a high reflectance, and can be arbitrarily selected by those skilled in the art.
  • the back chassis 15 may have the same shape and the same size as the reflection sheet 14.
  • the ratio between the amount of light used for space illumination and the amount of light used for ceiling illumination is preferably 70:30 to 95: 5, more preferably 80:20 to 90:10.
  • the size can be appropriately changed depending on the area and the arrangement site.
  • the light coupling member that couples the light emitted from the light source so that light is incident on the light guide plate obliquely is interposed between the light guide plate and the light source.
  • an irradiation direction control unit that controls the direction of light emitted from the outer peripheral end of the light guide plate is provided at the outer peripheral end of the light guide plate.
  • the present invention controls the irradiation direction of the light incident on the light guide plate, and the irradiation direction control unit capable of irradiating a part of the light to the back side of the light guide plate is provided at the outer peripheral end portion. Both spatial lighting and ceiling lighting as indirect lighting can be realized simultaneously.
  • the irradiation direction control unit includes a light transmissive member provided on an outer periphery of the light guide plate, and the light transmissive member is emitted from an outer peripheral end of the light guide plate. After the light to be guided is guided inside, at least a part of the light can be irradiated in a direction different from the surface side of the light guide plate.
  • the irradiation direction control unit can be easily obtained by a light transmissive member made of, for example, resin.
  • transmits a part of light radiate
  • the ratio of the direct illumination light and the joint illumination light can be changed by selecting the reflectance of the partially transmissive reflecting member.
  • a reflective member that guides light inside the light transmissive member and reflects light emitted to the surface side of the light transmissive member is provided on a surface side of the light transmissive member. It can be set as the structure provided. Moreover, the said reflection member can be set as the structure arrange
  • the light guided to the front surface side (for example, the indoor side) of the light transmissive member can be reflected, and the amount of light irradiated to the back surface side (for example, the ceiling side) can be increased.
  • the said light transmissive member is a 1st protrusion part arrange
  • the first protrusion and the second protrusion may have different protrusion lengths.
  • the illumination device of the present invention is characterized by including the above-described illumination device.
  • the lighting device of the present invention and the lighting device including the lighting device can be applied to ceiling-mounted ceiling lights, wall lighting attached to a wall surface, signboards, and the like. And as an application field, it can apply to various lighting fixtures, such as facilities, such as a store and an office, and business.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

L'invention vise à améliorer un rendement d'utilisation de lumière, et à obtenir à la fois un éclairage spatial en tant qu'éclairage direct et un éclairage de plafond en tant qu'éclairage indirect. A cet effet, l'invention porte sur un dispositif d'éclairage qui guide une lumière, venant d'une source de lumière, à travers une plaque de guidage de lumière (13) et qui rayonne la lumière vers l'extérieur à partir du côté de face avant de la plaque de guidage de lumière (13) sous la forme de lumière d'éclairage direct, et constitue un cadre (20) disposé à la périphérie externe de la plaque de guidage de lumière (13), qui guide une lumière rayonnée à partir d'une section d'extrémité périphérique externe de la plaque de guidage de lumière (13) à travers celui-ci, et qui rayonne la lumière dans des directions différentes de celle du côté de face avant de la plaque de guidage de lumière (13) sous la forme de lumière d'éclairage indirect.
PCT/JP2012/059938 2011-04-19 2012-04-11 Dispositif d'éclairage et appareil d'éclairage le comportant Ceased WO2012144393A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011-093406 2011-04-19
JP2011093406A JP2012226964A (ja) 2011-04-19 2011-04-19 照明装置、及びそれを備えた照明機器

Publications (1)

Publication Number Publication Date
WO2012144393A1 true WO2012144393A1 (fr) 2012-10-26

Family

ID=47041504

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2012/059938 Ceased WO2012144393A1 (fr) 2011-04-19 2012-04-11 Dispositif d'éclairage et appareil d'éclairage le comportant

Country Status (2)

Country Link
JP (1) JP2012226964A (fr)
WO (1) WO2012144393A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014153578A1 (fr) * 2013-03-28 2014-10-02 Zumtobel Lighting Gmbh Dispositif d'éclairage

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160096775A (ko) 2015-02-05 2016-08-17 삼성디스플레이 주식회사 백라이트 유닛 및 이를 포함하는 표시 장치
WO2016168830A1 (fr) * 2015-04-17 2016-10-20 Hubbell Incorporated Luminaire

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0590450U (ja) * 1992-05-13 1993-12-10 富士通テン株式会社 バックライト構造
JP2004241369A (ja) * 2003-02-04 2004-08-26 Fawoo Technology Co Ltd 光誘導部を備えた導光板
WO2010010741A1 (fr) * 2008-07-22 2010-01-28 シャープ株式会社 Unité d’éclairage, dispositif d’éclairage et dispositif d’affichage à cristaux liquides
JP3161425U (ja) * 2010-05-19 2010-07-29 株式会社ドウシシャ シーリングライト

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0590450U (ja) * 1992-05-13 1993-12-10 富士通テン株式会社 バックライト構造
JP2004241369A (ja) * 2003-02-04 2004-08-26 Fawoo Technology Co Ltd 光誘導部を備えた導光板
WO2010010741A1 (fr) * 2008-07-22 2010-01-28 シャープ株式会社 Unité d’éclairage, dispositif d’éclairage et dispositif d’affichage à cristaux liquides
JP3161425U (ja) * 2010-05-19 2010-07-29 株式会社ドウシシャ シーリングライト

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014153578A1 (fr) * 2013-03-28 2014-10-02 Zumtobel Lighting Gmbh Dispositif d'éclairage
US9798067B2 (en) 2013-03-28 2017-10-24 Zumtobel Lighting Gmbh Luminaire

Also Published As

Publication number Publication date
JP2012226964A (ja) 2012-11-15

Similar Documents

Publication Publication Date Title
KR101191213B1 (ko) 조명기구
WO2010001604A1 (fr) Dispositif d’éclairage
CN110325787A (zh) 具有光导的灯具
JP2015103323A (ja) 照明装置
JP6446202B2 (ja) 広角度拡散光学系及びこれを用いた照明装置
JP2013182730A (ja) 照明モジュールおよびそれを備えた照明装置
CN104272016B (zh) 控制从中心部分至边缘的均匀性的光导板结构以及使用该光导板结构的照明灯
WO2013128771A1 (fr) Module d'éclairage et dispositif d'éclairage équipé de ce dernier
CN101922634A (zh) Led照明装置
JP2008078015A (ja) 照明器具
KR100991890B1 (ko) 엘이디를 이용한 조명 모듈
WO2012144393A1 (fr) Dispositif d'éclairage et appareil d'éclairage le comportant
JP5133439B2 (ja) 照明装置、及びそれを備えた照明機器
JP5588217B2 (ja) 照明装置
JP2010522961A (ja) 汎用照明システムおよび照明器具
JP2012226966A (ja) 照明装置、及びそれを備えた照明機器
JP2004186124A (ja) 境界面を利用した平面照明器具
JP2012226965A (ja) 照明装置、及びそれを備えた照明機器
JP4848534B2 (ja) 面状光源
US20220120954A1 (en) Lateral edge-lit light-guide optics for led lighting
TWI409412B (zh) Led照明裝置
JP2012145829A (ja) 発光装置および照明装置
JP2012227043A (ja) 照明装置
JP2012204218A (ja) 照明装置、及びそれを備えた照明機器
WO2012144394A1 (fr) Unité d'éclairage et dispositif d'éclairage associé

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12773616

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12773616

Country of ref document: EP

Kind code of ref document: A1