WO2004018933A1 - 照明装置及び液晶表示装置 - Google Patents
照明装置及び液晶表示装置 Download PDFInfo
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- WO2004018933A1 WO2004018933A1 PCT/JP2003/002020 JP0302020W WO2004018933A1 WO 2004018933 A1 WO2004018933 A1 WO 2004018933A1 JP 0302020 W JP0302020 W JP 0302020W WO 2004018933 A1 WO2004018933 A1 WO 2004018933A1
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- Prior art keywords
- light
- light guide
- linear
- lighting device
- light source
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Classifications
-
- 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
-
- 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
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
-
- 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
- G02B6/0016—Grooves, prisms, gratings, scattering particles or rough surfaces
Definitions
- the present invention relates to a lighting device and a liquid crystal display device, and more particularly to a lighting device capable of illuminating with a uniform light intensity and a liquid crystal display device using the lighting device.
- liquid crystal panels are thin and lightweight, they are widely used as display screens for portable information terminals.
- the liquid crystal panel includes a transmission type liquid crystal panel and a reflection type liquid crystal panel.
- FIG. 15A is a cross-sectional view showing a transmissive liquid crystal panel.
- a deflector 2 14 is interposed between the glass substrate 210 and the glass substrate 212.
- Bus lines 2 16 and the like are formed on the glass substrate 2 12.
- a liquid crystal 220 is sealed between the glass substrate 212 and the glass substrate 218.
- Color filters 224 a, 224 b, and 224 c are interposed between the glass substrate 218 and the glass substrate 222.
- a deflector 228 is interposed between the glass substrates 222 and 226.
- FIG. 15B is a cross-sectional view showing the reflective liquid crystal panel.
- a mirror 230 is interposed between the glass substrate 210 and the glass substrate 212.
- the mirror 230 reflects the light guided from the upper surface of the reflective liquid crystal panel.
- the lighting device is provided on the lower surface side of the liquid crystal panel.
- the lighting device is provided on the upper surface side of the liquid crystal panel.
- FIG. 16 is a perspective view showing the proposed lighting device.
- the proposed lighting device 110 is a device that emits light from LEDs 112a, 112b and LEDs 121a, 121b.
- Linear light guide 114 that converts the light into linear light and emits it, and planar light guide that converts the linear light emitted from the linear light guide 114 to planar light and emits it.
- the body 1 16 On the back side of the linear light guide 114, that is, on the reflection side, a plurality of light reflection portions 120 are formed in a stripe shape.
- a reflection coating film 118 is formed on the reflection side of the linear light guide 114.
- FIG. 17 is a perspective view and a plan view showing a linear light guide of the proposed lighting device.
- the light emitted from the LEDs 112a and 112b is directed to the back side of the linear light guide 114, that is, the surface of the light reflecting portion 120 formed on the reflecting side. And is emitted from the front side of the linear light guide 114, that is, from the emission side.
- Light emitted linearly from the exit side of the linear light guide 114 is converted into planar light by the planar light guide 116 and emitted from the plane of the planar light guide 116. Is done.
- the liquid crystal panel can be illuminated in a plane.
- Such an illuminating device is described in, for example, Japanese Patent Application Laid-Open No. 10-260405.
- FIG. 18 is a graph showing the intensity distribution of light emitted from the linear light guide of the proposed lighting device.
- the horizontal axis shows the position from the center of the linear light guide 114, and the vertical axis shows the light intensity.
- the intensity distribution of light emitted from the linear light guide 114 is not uniform, and there are portions where the light intensity is high and portions where the light intensity is low.
- the intensity distribution of the light emitted from the linear light guide 114 is reflected in the intensity distribution of the light emitted from the planar light guide 116.
- the intensity distribution of the light emitted from the planar light guide 116 was not uniform, and there were high intensity portions and low intensity portions in the plane. Therefore, using the proposed lighting device, In the case of the configuration, good display characteristics could not be obtained.
- An object of the present invention is to provide a lighting device capable of illuminating with a uniform light intensity and a liquid crystal display device having good display characteristics using the lighting device.
- the object is to provide a first light source, a second light source provided apart from the first light source, and a first light source provided between the first light source and the second light source. And a linear light guide that linearly emits light introduced from the second light source from an emission side.
- a first light reflecting portion including a first V-shaped groove for reflecting light introduced from the first light source, and reflecting light introduced from the second light source.
- a plurality of second light-reflecting portions each comprising a second V-shaped groove, wherein an intersection angle of the surface of the first V-shaped groove and an angle of intersection of the surface of the second V-shaped groove are formed.
- intersection angles are angles substantially equal to each other, and the surfaces of the plurality of first light reflecting portions are arranged such that the light introduced from the first light source receives light introduced from the first light source in the longitudinal direction of the linear light guide. Respectively, are inclined at angles such that the light is emitted in a direction substantially perpendicular to the surface of the plurality of second light reflecting portions. Each of the plurality of first light reflecting portions is inclined at an angle such that the light is emitted in a direction substantially perpendicular to the longitudinal direction of the light guide, and the first light reflecting portions of the linear light guide are At least in a region near the end opposite to the side on which the light source is provided, and the plurality of second light reflecting portions are provided with the second light source of the linear light guide.
- the lighting device is at least formed in a region near the end opposite to the side.
- the above object is to provide a first light source, a second light source provided apart from the first light source, and provided between the first light source and the second light source, A linear light guide that linearly emits light introduced from the first light source and the second light source from an emission side; and the linear light guide is optically coupled to the linear light guide.
- On the reflection side opposite to the first side there is a first V-shaped groove for reflecting light introduced from the first light source.
- a plurality of second light reflecting portions each including a second V-shaped groove for reflecting light introduced from the second light source, and a plurality of second light reflecting portions each including a second V-shaped groove.
- the intersection angle of the surface of the V-shaped groove and the intersection angle of the surface of the second V-shaped groove are substantially equal to each other, and the surfaces of the plurality of first light reflecting portions are Each of the plurality of second light reflecting portions is inclined at an angle such that light introduced from the first light source is emitted in a direction substantially perpendicular to the longitudinal direction of the linear light guide.
- the surfaces are respectively inclined at angles such that light introduced from the second light source is emitted in a direction substantially perpendicular to the longitudinal direction of the linear light guide, and
- the light reflecting portion has at least a shape in a region near the end of the linear light guide opposite to the side on which the first light source is provided.
- the plurality of second light reflecting portions are formed at least in a region near an end of the linear light guide opposite to the side on which the second light source is provided. This is achieved by a liquid crystal display device.
- the first light reflecting portion of the first light source which emits the light incident thereto in a direction perpendicular to the longitudinal direction of the linear light guide, is formed by the linear light guide.
- the first light source of the body is provided at least in a region near the end on the side opposite to the “3 ⁇ 4” side, and the light introduced from the second light source is directed to the longitudinal direction of the linear light guide.
- a second light reflecting portion for emitting light in a vertical direction is formed at least in a region near the end of the linear light guide opposite to the side on which the second light source is provided.
- the present invention at a position near the first light source, light introduced from the second light source can be reflected by using the second light reflecting portion, and a position near the second light source can be reflected. in can reflect light entering from the first light source with the first light reflecting portion. Therefore, according to the present invention, the crossing angle theta p with each other Even if the first light reflecting portion and the second light reflecting portion are formed by V-shaped grooves, the light intensity is suppressed from weakening in the region near the end of the linear light guide. Therefore, according to the present invention, the light intensity distribution can be further uniformed, and good display characteristics can be realized.
- FIG. 1 is a perspective view and a plan view showing a lighting device according to the first embodiment of the present invention is a plan view of the lighting apparatus according to a first embodiment of the present invention.
- FIG. 3 is a graph showing an example of the inclination angle of the surface of the light reflecting portion of the lighting device according to the first embodiment of the present invention.
- FIG. 4 is a schematic diagram showing a relationship between human eyes and a display screen.
- FIG. 5 is a graph showing a light intensity distribution of the lighting device according to the first embodiment of the present invention.
- FIG. 6 is a plan view showing a lighting device according to the second embodiment of the present invention.
- FIG. 7 is a graph showing an example of the inclination angle of the surface of the light reflecting portion of the lighting device according to the second embodiment of the present invention.
- FIG. 8 is a graph showing a light intensity distribution of the lighting device according to the second embodiment of the present invention.
- FIG. 9 is a graph illustrating an example of an inclination angle of a light reflecting portion of a lighting device according to a modification of the second embodiment of the present invention.
- FIG. 10 is a plan view showing a lighting device according to a third embodiment of the present invention.
- FIG. 11 is a graph showing an example of the inclination angle of the surface of the light reflecting portion of the lighting device according to the third embodiment of the present invention.
- FIG. 12 is a plan view showing a lighting device according to a fourth embodiment of the present invention.
- FIG. 13 is a perspective view showing the liquid crystal display device according to the fifth embodiment of the present invention.
- FIG. 14 is a perspective view showing the liquid crystal display device according to the sixth embodiment of the present invention.
- FIG. 15 is a cross-sectional view showing a transmissive liquid crystal panel and a reflective liquid crystal panel.
- FIG. 16 is a perspective view showing the proposed lighting device.
- FIG. 17 is a perspective view and a plan view showing a linear light guide of the proposed lighting device.
- FIG. 18 is a graph showing the intensity distribution of light emitted from the linear light guide of the proposed lighting device.
- FIG. 19 is a plan view showing the proposed lighting device.
- FIG. 1 1 is a perspective view and a plan view illustrating the lighting device according to the present embodiment.
- FIG. 1A is a perspective view of the lighting device according to the present embodiment.
- FIG. 1B is a plan view showing the lighting device according to the present embodiment.
- FIG. 2 is a plan view showing the lighting device according to the present embodiment.
- FIG. 3 is a graph showing the inclination angle of the light reflecting portion of the lighting device according to the present embodiment.
- FIG. 4 is a schematic diagram showing a relationship between human eyes and a display screen.
- FIG. 5 is a graph showing the light intensity distribution of the lighting device according to the present embodiment.
- the lighting device 10 converts LEDs 12 a and 12 b emitting light and light introduced from the LEDs 12 a and 12 b into linear light.
- a linear light guide 14 that is optically coupled to the linear light guide 14 and converts the linear light into planar light and emits the same. Have.
- a reflection coating film 18 is formed on the reflection side of the linear light guide 14.
- the LED 12 a is provided at the left end of the linear light guide 14 on the paper surface.
- the LED 12 b is provided at the right end of the linear light guide 14 on the paper surface.
- the distance ⁇ L between the LEDs 12a and 12b and the linear light guide 14 is set to, for example, Omm.
- the linear light guide 14 is formed in a quadrangular prism shape as a whole.
- a material of the linear light guide 14 for example, glass or plastic is used.
- the refractive index Ng of the linear light guide 14 is, for example, 1.51.
- the thickness t of the linear light guide 14 is set to, for example, 3 mm.
- the length L of the linear light guide 14 is set to, for example, 37 mm in the case of a lighting device used for a liquid crystal display device of, for example, 2 inches.
- the width of the display screen of a 2 inch liquid crystal display device is about 35 mm, but if the length L of the linear light guide 14 is set to 37 mm, a margin of 2 mm can be secured.
- a plurality of light reflection portions 20a and 2Ob are formed in a stripe shape.
- the light reflecting portions 20a and 2Ob are formed by V-shaped grooves.
- exchange angle 0 P side of the V-shaped grooves forming the light reflection portions 20 a, 20 b has a both equal angles.
- the intersection angles ⁇ p of the surfaces of the V-shaped grooves constituting the light reflecting portions 20a and 2Ob are equal to each other because they are used when forming a mold or the like for forming a linear light guide. This is to ensure that only one type of cutting tool is needed. This makes it possible to produce a mold for molding the linear light guide at low cost. Thus, the cost of the linear light guide can be reduced.
- the light reflecting portion 20a reflects light introduced into the linear light guide 14 from the LED 12a provided on the left side of the drawing, and emits light from the emission side of the linear light guide 14. It is for.
- the light reflecting portion 20a is formed, for example, at an even-numbered position on the left side of the linear light guide 14 from the center of the linear light guide 14 as counted from the left side of the linear light guide 14 on the paper.
- the light reflecting portion 20a is formed, for example, at an odd-numbered position on the right side of the drawing from the center of the linear light guide 14, as counted from the left side of the drawing of the linear light guide 14.
- the light reflecting portion 20b reflects the light introduced into the linear light guide 14 from the LED 12b provided on the right side of the drawing, and emits light from the emission side of the linear light guide 14 It is for.
- the light reflecting portion 2 Ob is formed, for example, at an odd-numbered position on the left side of the drawing from the center of the linear light guide 14 as counted from the left side of the drawing of the linear light guide 14.
- the light reflecting portion 20b is formed, for example, at an even-numbered position on the right side of the drawing from the center of the linear light guide 14 as counted from the left side of the drawing of the linear light guide 14.
- a large number of light reflecting portions 20a and 20b are formed on the reflection side of the linear light guide 14, respectively, but are omitted in FIG.
- the light reflecting portions 20a and 2Ob are formed alternately at a pitch of, for example, 0.23 mm. For example, a total of 150 light reflecting portions 20a and 2Ob are formed.
- the light reflecting portion 20 ai of the light reflecting portion 20 a is configured such that light introduced into the linear light guide 14 from the LED 12 a provided on the left side of the drawing sheet is emitted from the linear light guide 14. It is formed at a location where the light can be totally reflected by the side surface and introduced into the light reflecting portion 20a, that is, a location that satisfies the total reflection condition.
- the light reflecting portion 2 0 of which light reflecting portions 2 0 a 2 of a, the light introduced into the LED 1 2 a linear light conductor 1 4 provided on the left side is, the linear light conductor 1 It is formed at a place where the light cannot be introduced into the light reflecting portion 20a due to the total reflection on the emission side surface of No. 4, that is, a place that does not satisfy the above total reflection condition.
- the light reflecting portion 20a is totally reflected by the light-emitting surface of the linear light guide 14 from the LED 12a provided on the left side of the paper, and furthermore, the light reflecting portion 20a The light is totally reflected by the left surface of the paper and exits in a direction perpendicular to the longitudinal direction of the linear light guide 14. As described above, the inclination angle ( L (n) of the left surface of the light reflecting portion 20 ai is set.
- the light reflecting portion 20a totally reflects the light introduced from the LED 12a provided on the left side of the drawing on the emission side surface of the linear light guide 14; At a tilt angle of 0a (n), the light is reflected in the direction perpendicular to the longitudinal direction of the linear light guide 14 so that it is totally reflected by the left surface of the light reflecting portion 20 ai on the paper surface. It is inclined.
- the inclination angle ⁇ a (n) of the light reflection part 20 a is the inclination angle of the light reflection part 20 ai itself.
- the inclination angle ⁇ a (n) of the V-shaped groove forming the light reflection part 20 a is The bisector of the plane intersection angle 0 p is the angle inclined with respect to the direction normal to the longitudinal direction of the linear light guide 14.
- the inclination angle 0 (n) of the surface of the light reflecting portion 20 ai is represented by the following equation.
- n means that it is related to the n-th light reflecting portion. Also, ⁇
- X (n) is the distance from the left end face of the linear light guide 14 to the n-th light reflecting portion.
- Equation (1) is equivalent to a light reflecting portion formed on the left side of the drawing from the center of the linear light guide 14.
- the inclination angle ⁇ a (n) of the light reflecting portion 20 ai is expressed by the following equation. Note that 0.
- the light reflecting portion 20 is such that, when the light reflecting portion 20 is formed at the center of the linear light guide 14, light is emitted in a direction perpendicular to the longitudinal direction of the linear light guide 14. Is the angle of inclination of the surface. 0. Can be represented by the following equation.
- light reflecting portion 20 a 2 is the light introduced from the LED 1 2 L provided in the left side to the linear light conductor 14, it is totally reflected by the surface of the exit side of the linear light conductor 14 without being directly incident on the left side of the planes of the light reflection portion 20 a 2, is totally reflected by the left side of the planes of the light reflection portions 20 a 2, perpendicular to the longitudinal direction of the linear light conductor 14 Uni emitted in the direction, in which the inclination angle 0 of the left side surface of the light reflection portions 20 a 2 L (n) are set, respectively.
- the light reflecting portion 20 a 2 the light introduced from the LED 1 2 L provided in the left side in the line-shaped light guiding member 14, the total reflection at the surface on the exit side of the linear light conductor 14 without having to go through the, is directly incident to the left side surface of the light reflection portions 20 a 2, is totally reflected by the left side of the planes of the light reflection portions 20 a 2, relative to the longitudinal direction of the linear light conductor 14
- Each beam is inclined at an inclination angle of 0 a (n) so that the light is emitted in a vertical direction.
- the inclination angle 0 a of the light reflection portions 20 a 2 (n) is the inclination angle of the light reflection portions 20 a 2 itself, specifically, the V-shaped forming the light reflecting portion 20 a 2 grooves of
- the bisector of the plane intersection angle 0 p is the angle that is inclined with respect to the direction normal to the longitudinal direction of the linear light guide 14.
- the inclination angle ⁇ of the light reflecting portion 20 a 2 L (n) is expressed by the following formula.
- Expression (4) expresses the inclination angle 0 (n) of the surface of the light reflecting portion 20 a 2 formed on the left side of the drawing from the center of the linear light guide 14.
- the expression for inclination angle 0 L of the planes of the light reflection portions 2 0 a 2 formed in the right side of the middle of the linear light conductor 1 4 (n) is omitted here.
- the light reflecting portion 20 b is configured such that the light introduced into the linear light guide 14 from the LED 12 b provided on the left side of the paper is emitted from the linear light guide 14. It is formed at a position where the light can be totally reflected by the side surface and introduced into the light reflecting portion 20b, that is, a position satisfying the total reflection condition.
- the light reflecting portion 20 b 2 emits light introduced into the linear light guide 14 from the LED 12 b provided on the left side of the drawing sheet. It is formed at a place where the light cannot be introduced into the light reflecting portion 20b after being totally reflected by the surface on the emission side of 4, that is, a place that does not satisfy the above-mentioned total reflection condition.
- the light reflecting portion 20 b is configured such that light directly introduced from the LED 12 b provided on the right side of the drawing into the right side surface of the light reflecting portion 20 bi on the drawing surface is emitted from the linear light guide 14. The light is reflected so as to be totally reflected by the surface of the linear light guide 14 and then totally reflected by the surface on the right side of the paper of the light reflecting portion 20b. Reflection section 2 0 1 ⁇ The inclination angle 0 R (n) of the right side surface is set. In other words, the light reflecting portion 20 b is formed by the light that is directly introduced from the LED 12 b provided on the right side of the drawing to the right surface of the light reflecting portion 20 b on the drawing surface.
- the light is totally reflected by the surface on the emission side of 4, and further totally reflected by the surface on the right side of the paper of the light reflecting portion 20b, and emitted in the direction perpendicular to the longitudinal direction of the linear light guide 14. In this way, they are inclined at an inclination angle of 0 b (n).
- the inclination angle 0 b (n) of the light reflection portion 20 bi is the inclination angle of the light reflection portion 20 b itself, and specifically, a V-shaped groove forming the light reflection portion 20 b
- the bisector of the intersection angle ⁇ p of the surface is inclined with respect to the direction normal to the longitudinal direction of the linear light guide 14.
- the inclination angle ⁇ P (n) of the surface of the light reflecting portion 20 b is expressed by the following equation.
- Equation (6) expresses the inclination angle 0 R (n) of the surface of the light reflecting portion 2 O bi formed on the left side of the drawing from the center of the linear light guide 14.
- the expression representing the inclination angle ⁇ R (n) of the surface of the light reflecting portion 20b formed on the right side of the paper surface from the center of the linear light guide 14 is omitted here.
- the light reflecting portion 20 b 2 is provided so that the light introduced into the linear light guide 14 from the LED 12 b provided on the left side of the paper is not totally reflected on the emission side surface of the linear light guide 14. , is directly incident to the right side surface of the light reflection portions 20 b 2, is totally reflected by the right side surface of the light reflection portions 20 b 2, a direction perpendicular to the longitudinal direction of the linear light conductor 14 it is emitted urchin, in which the inclination angle 0 of the right side surface of the light reflection portions 20 b 2 R (n) are set.
- the light reflecting portion 20 b 2 reflects the light introduced into the linear light guide 14 from the LED 12 b provided on the left side of the drawing sheet on the emission side surface of the linear light guide 14. without having to go through the, is directly incident to the right side surface of the light reflection portions 20 b 2, is totally reflected by the right side surface of the light reflection portions 20 b 2, with respect to the longitudinal direction of the linear light conductor 14 Each is inclined at an inclination angle of 0 R (n) so that light is emitted in a vertical direction.
- the inclination angle 0 of the light reflection portions 20 b 2 b (n) is the inclination angle of the light reflection portions 20 b 2 itself, specifically, the V-shaped forming the light reflecting portion 20 b 2 grooves of The bisector of the plane intersection angle ⁇ p is an angle inclined with respect to the direction normal to the longitudinal direction of the linear light guide 14.
- FIG. 3 is a graph showing an example of the inclination angles ⁇ a ( ⁇ ) and ⁇ b (n) of the light reflecting portion of the lighting device according to the present embodiment.
- the horizontal axis represents the distance X (n) from the end face of the linear light guide 14 to the light reflecting portions 20a and 20b, and the vertical axis represents the inclination angle of the light reflecting portions 20a and 20b.
- a ( ⁇ ) shows ⁇ b a (n).
- the screen size is 2 inches
- the width of the display screen is 35 mm
- the total number of the light reflecting portions 20a and 20b is 150
- the pitch of the light reflecting portions 20a and 2 Ob is 0.23 mm
- 1 03.8 degrees crossing angle 0 p side of the V-shaped grooves forming the light reflection portions 3 mm thickness t of the linear light conductor 14
- the length L of 37 mm of the linear light conductor 14 The distance ⁇ L between the LEDs 12 a, 12 b and the linear light guide 14 is 0 mm
- the refractive index of the linear light guide 14 is 1.5. 1.
- the distance between the human eye and the display screen was calculated as 35 Omm.
- FIG. 5 is a graph showing the light intensity distribution of the lighting device according to the present embodiment.
- the horizontal axis indicates the position in the linear light guide, and the vertical axis indicates the light intensity.
- intersection angles theta p is the light reflecting portion 20 a by the same V-shaped grooves with each other, 20 b is configured, Senjoshirube the light introduced from the LED 1 2 a
- a light reflecting portion 20a for emitting light in a direction perpendicular to the longitudinal direction of the light body 14 and light introduced from the LEDs 12b are perpendicular to the longitudinal direction of the linear light guide 14.
- the main feature is that light reflecting portions 20b for emitting light in the direction are alternately formed.
- Japanese Patent Application No. 2001-263922 proposes a lighting device as shown in FIG.
- light introduced from the LED 12 a is substantially perpendicular to the longitudinal direction of the linear light guide 14 on the side where the LED 12 a is provided.
- a light reflecting portion 20m for emitting light in the direction is formed, and light introduced from the LED 12b is provided in the longitudinal direction of the linear light guide 14 on the side where the LED 12b is provided.
- a light reflecting portion 20 n for emitting light in a direction substantially perpendicular to the direction is formed.
- the light from LED 12a does not reach the light reflector 2 Om formed near the LED 12a, and is formed near the LED 12b.
- the intensity of the light emitted from near the end of the linear light guide 14 becomes weak.
- the light from the LED 12a did not reach the light reflecting portion 2Om formed near the LED 12a, and the light reflecting portion 20n formed near the LED 12b did not reach the light reflecting portion 2Om.
- the light from the LED 12b does not arrive because the light is totally reflected at the end of the linear light guide 14, as shown by the dotted line in FIG.
- the light introduced from the LED 12 a is A light reflecting portion 20a for emitting light in a direction perpendicular to the longitudinal direction of 4 and light introduced from the LED 12b in a direction perpendicular to the longitudinal direction of the linear light guide 14
- Light reflecting portions 20b for emitting light are formed alternately. For this reason, in the present embodiment, at a position close to the LED 12a, light introduced from the LED 12b can be reflected using the light reflecting portion 20b, and At a close position, light introduced from the LED 12a can be reflected using the light reflecting portion 20a.
- the intersection angle 0 p is the light reflection section 2 0 a by grooves mutually equal V-shaped, 2 0 be filed in the case where b was formed, the ends of the linear light conductor 1 4 It is possible to suppress the light intensity from weakening in the region near the part. Therefore, according to the present embodiment, the light intensity distribution can be further uniformed, and good display characteristics can be realized.
- FIG. 6 is a plan view showing the lighting device according to the present embodiment.
- FIG. 7 is a graph showing the inclination angle of the light reflecting portion of the lighting device according to the present embodiment.
- FIG. 8 is a graph showing the light intensity distribution of the lighting device according to the present embodiment.
- the same components as those of the lighting device according to the first embodiment shown in FIGS. 1 to 5 are denoted by the same reference numerals, and description thereof will be omitted or simplified.
- the light reflecting portions 20 a 2 and 20 b 2 are formed on the reflecting side of the linear light guide 14, and the light reflecting portions 20 a and 20 b!
- the main feature is that is not formed (see Fig. 2).
- the reflection side of the linear light conductor 1 4 a plurality of light reflecting portions 2 0 a 2, 2 0 b 2 are formed in stripes.
- the light reflecting portion 2 0 a 2, 2 0 b 2 has been large number respectively formed on the reflection side of the linear light conductor 1 4, 6 are omitted.
- Light reflecting portion 2 0 a As described above, LED 1 2 a force provided in the left side, the light is introduced directly into the left side surface of Hikari Luo reflection portions 2 0 a 2 is, the light reflecting portion 2 0 is totally reflected by the left side surface of a 2, as emitted in a direction perpendicular to the longitudinal direction of the linear light conductor 1 4, the light reflecting portion 2 0 a. Is 0 L (n) on the left side of the paper Each is set.
- Tilt angle 0 L of the planes of the light reflection portions 20 a 2 (n) can be expressed by the above equation (4).
- the inclination angle of the light reflection portions 20 a 2 ⁇ a (n) can and this represented by the above formula (5).
- Light reflecting portion 20 b 2 as described above, light is introduced directly into the right side surface of the LED 12 b or Hikari Luo reflecting portion 20 b 2 provided on the right side is, the light reflecting portion 20 b 2
- the inclination angle 0 R (n) of the right-hand surface of the light reflecting portion 20 b 2 so that it is totally reflected by the right surface of the paper and exits in a direction perpendicular to the longitudinal direction of the linear light guide 14. ) are the ones set respectively.
- the inclination angle 0 R (n) of the surface of the light reflecting portion 20 b 2 is represented by the following equation.
- Expression (8) expresses the inclination angle 0 R (n) of the surface of the light reflecting portion 20 b 2 formed on the left side of the drawing from the center of the linear light guide 14.
- FIG. 7 is a graph showing an example of the inclination angles 0 a (ii) and ⁇ b (n) of the light reflecting portion of the lighting device according to the present embodiment.
- Horizontal axis from the end face of the linear light conductor 1 4 shows the light reflecting portion 2 0 a 2, 2 0 distance to b 2 X (n), and the vertical axis, the light reflecting portion 20 a 2, 2013 2 shows the inclination angles 0 & (n) and ⁇ h (n).
- the screen size is 2 inches
- the display screen width is 35 mm
- the total number of the light reflecting portions 20a and 20b is 150
- the light reflecting portion 20 The pitch of a, 20b is 0.23 mm
- the intersection angle of the surface of the V-shaped groove that constitutes the light reflecting section is 103.8 degrees
- the thickness t of the linear light guide 14 is 3 mm
- the linear light guide is 14 Length L is 37 mm
- distance ⁇ L between LED 12 a, 12 b and linear light guide 14 is 0 mm
- refractive index of linear light guide 14 is 1.51, visible
- the distance between the human eye and the display screen was calculated as 35 Omm.
- FIG. 8 is a graph showing the light intensity distribution of the lighting device according to the present embodiment.
- the horizontal axis shows the position in the linear light guide, and the vertical axis shows the light intensity.
- the vicinity of the boundary between the region where the region and the light reflecting portion 20 a 2 of the light reflecting portion 20 a E is formed is formed, ⁇ Pi light reflecting portion 2 0 b!
- the inclination angles 0 a ( ⁇ ) of the light reflecting portions 20 a and 2 O b , ⁇ b (n) changed rapidly.
- FIG. 5 there was a region where the light intensity was slightly non-uniform.
- the reflection side of the 'linear light conductor 14 without forming the light reflection portions 20 a physician 20 bi by forming only the light reflecting portion 20 a 2, 20 b 2 Therefore, as shown in FIG. 7, it is possible to eliminate a portion where the inclination angle 6 a ( ⁇ ) and ⁇ b (n) of the light reflecting portion change rapidly. Therefore, according to the present embodiment, as shown in FIG. Thus, a very uniform light intensity distribution can be obtained.
- FIG. 9 is a graph showing an example of the inclination angle of the light reflecting portion of the lighting device according to the present modification.
- the outline of the structure of the lighting device according to the present modification is the same as the structure of the lighting device shown in FIG.
- the lighting device obtains an expression representing the inclination angles 0 a ( ⁇ ) and ⁇ b (n) of the light reflecting portions 20 a and 20 b by linear approximation, and based on the obtained expression, light reflection portion 2 0 a, 2 O b tilt angle 0 a a ( ⁇ ), ⁇ b (n ) is characterized mainly in that you have been set respectively.
- the inclination angle ⁇ b (n) of the light reflecting portion 20 b formed on the left side of the linear light guide 14 on the paper surface, and the light reflection formed on the right side of the linear light guide 14 on the paper surface The inclination angle ⁇ a (n) of the part 20 a can be represented by the following approximate expression.
- the position X (n) Is suitable for linear approximation because the change in inclination angle ⁇ a ( ⁇ ) and ⁇ h (n) with respect to the change in Not in. Therefore, the inclination angle 0 b (n) of the light reflecting portion 20 b formed on the right side of the linear light guide 14 on the paper surface and the light reflection portion 20 a formed on the left side of the linear light guide 14 on the paper surface inclination angle 0 a (n), as in the illumination apparatus shown in FIG. 6, the inclination angle of 0 a ( ⁇ ), ⁇ b (n) of may be set, respectively.
- FIG. 9 is a graph showing an example of the inclination angles ⁇ a ( ⁇ ) and ⁇ b (n) of the surface of the light reflecting portion obtained as described above.
- the horizontal axis shows the light reflecting portion 20 a 2, 20 distance to b 2 X (n) from the end surface of the linear light conductor 14, and the vertical axis, the light reflecting portion 20 a 2, a 20 b 2
- the inclination angles 0 a ( ⁇ ) and ⁇ b (n) are shown.
- the change of the inclination angles 0 a ( ⁇ ) and ⁇ b (n) of the light reflection parts 20 a and 2 Ob with respect to the change of the distance X ( ⁇ ) is linear. It has become.
- the inclination angles 0 a ( ⁇ ) and ⁇ b (n) of the light reflecting portions 20 a and 2 O b are set based on the equation obtained by the linear approximation.
- the change of the inclination angles 0a (n) and 0b (n) of the light reflecting portions 20a and 2Ob with respect to the change of the distance X (n) can be made linear.
- FIG. 10 is a plan view showing the lighting device according to the present embodiment.
- FIG. 11 is a graph showing the inclination angle of the light reflecting portion of the lighting device according to the present embodiment.
- the same components as those of the lighting device according to the first or second embodiment shown in FIGS. 1 to 9 are denoted by the same reference numerals, and description thereof will be omitted or simplified.
- b (n) is set individually.
- the lighting device according to the second embodiment described above as can be seen from Figure 7, in the left side of the linear light conductor 14 and the inclination angle ⁇ of the light reflecting portion 20 a 2 a (n) greatly changes, On the right side of the linear light guide 14 on the paper surface, the inclination angle of the light reflecting portion 20 b 2 ⁇ b
- the changes in the inclination angles 0 3 ( ⁇ ) and ⁇ b (n) of the light reflecting portions 20 a 2 and 201 to 2 are set to be more gradual, the light intensity distribution can be made even more uniform. .
- the least square method It is set based on the following formula.
- equation (1 1) the value of A 0 can be, for example, 20.88983921 766 28, and the value of 93305871 be a 55 1 098 2, the value of a 2 can be a 0.1 7593 58687141 04 for example, the value of a 3 can you to, for example, 0.0597356 14098243 9, the a 4 The value can be, for example, 0.0001 62849 1 70428 9 1.
- the inclination angle 0a (n) of the light reflecting portion 20a2 is set so as to satisfy the following conditions.
- a linear guide counted from the left side of the light 1 r th light reflection part 20 a 2 (the r + 1-th light reflection part 20 a 2 (r + 1) Is the distance between ⁇ and the inclination angle of the r-th light reflection part 20 a 2 ( r + 1 ) ⁇ a (n) and the inclination of the r + first light reflection part 20 a 2 ( ⁇ + 1 )
- the difference from the angle ⁇ a (n) is A 0 a
- the inclination angle 0 a (n of the light reflecting portion 20 a 2 is set so that the absolute value of ⁇ 0 3 ⁇ is 2.71 degrees / mm or less. ) Are set respectively.
- the r-th light reflecting portion 2 counted from the left side of the paper of the linear light guide 14 The distance between 0 a 2 (and the r + 1st light reflector 20 a 2 (r + 1) is ⁇ , and the inclination angle of the rth light reflector 20 a 2 ( r + 1 ) ⁇ a (n ) And the (r + 1) light reflection part 20 a 2 ( where A 0 a is the difference between the inclination angle 0 a (n) of r + D, the absolute value of ⁇ 0 a ZAX is 2.71 degrees / mm or less. and such that the inclination angle 0 L of the planes of the light reflection portions 20 a 2 (n) is set, respectively.
- the inclination angle ⁇ 3 ⁇ 4 (n) of the light reflecting portions 20 b 2 is, as described above, the least square. It is set based on the formula using the method.
- the inclination angle 0 b (n) of the light reflecting portion 20 b 2 is set so as to satisfy the following conditions.
- the distance between the s-th light reflecting portion 20 b 2 (s) and the s + 1-th light reflecting portion 20 b 2 (s + 1) counted from the right side of the paper surface of the linear light guide 14 is ⁇ , s-th light reflection portion 20 b 2 and tilt oblique angle 0 b tilt angle (s) 0 b (n) and the s + 1-th light reflection part 20 b 2 (s + 1) (n)
- the inclination angle ⁇ b (n) of the light reflecting portion 20 b 2 is set so that the absolute value of ⁇ ⁇ b / AX is 2.71 degrees Zm m or less. .
- s-th light reflection part 20 b 2 the tilt angle theta b of inclination angle 0 b and (n) of (n) and s + 1-th light reflection portion 20 b 2 (s + 1) of Assuming that the difference is A 0 b , the inclination angle 0 R (n) of the surface of the light reflecting portion 20 b 2 is set so that the absolute value of ⁇ ⁇ b ZAX is 2.71 degrees / mm or less. I have.
- the inclination angles ⁇ 3 ( ⁇ ) and ⁇ b (n) are set for the other light reflecting portions 20 a 2 and 20 b 2 in the same manner as in the second embodiment.
- ⁇ ⁇ 3 / ⁇ , Razz such only setting a small delta theta b / AX, so also decreases the amount of variation of the variation amount Ya ⁇ 3 ⁇ 4 / ⁇ of delta theta 3, the inclination angle theta a ( ⁇ ) and ⁇ b (n) are set respectively.
- the distance between the r-th light reflector 20 a 2 ) and the r + 1-th light reflector 20 a 2 (r + 1) is ⁇ (r) r + 1 the first light reflector 20 ′ a 2 (r + 1) and r + 2nd light
- the distance between the reflector 20 a 2 (r + 2) is ⁇ (r + 1) , the inclination angle 0 a (n) of the r-th light reflector 20 a 2 (r ) and the r + 1 light reflecting portion 20 a 2 (r + 1) inclination angle 0 the difference between a delta theta a to (r), r + 1 th tilt angle 0 a of the light reflection portions 20 a 2 (r + 1) (n) and r + 2 th light reflection part 20 a 2 (r + 2) difference of delta 0 a tilt angle theta a (n) and the (r + 1) Then, ⁇ 0 a) (r) and delta theta a (r + 1) / ⁇
- the distance between the r-th light reflector 20 a 2 ) and the r + 1-th light reflector 20 a 2 (r + 1) is ⁇ (r) , r + 1 the first light reflector.
- the distance between 20 a 2 (r + 1) and the r + second light reflector 20 a 2 (r + 2) is ⁇ (r + 1)
- the r-th light reflector 20 & 2 The difference between the tilt angle 0 £ 1 (n) and the tilt angle 0 a of the (r + 1) th light reflector 20 a 2 (r + 1) is ⁇ ⁇ 3 ), and the (r + 1) th light reflector 20 a 2 (r + 1) inclination angle theta a to (n) and to the difference between the ⁇ ⁇ a (r + ⁇ and r + 2-th light reflection part 20 a 2 (r + 2) tilt angle theta a to (n) Then, the absolute value of the difference between ⁇ 0 a ( r) ⁇
- the distance between the s-th light reflecting portion 20 b 2 ( s) and the s + 1-th light reflecting portion 20 b 2 (s + 1) is ⁇ ( s ), and the s + 1-th light reflecting portion
- the distance between 20 b 2 + 1 ) and the s + 2nd light reflector 20 b 2 (s + 2) is ⁇ ( s + 1)
- the slope of the sth light reflector 20 b 2 (s) The difference between the angle 0 b (n) and the inclination angle ⁇ b of the s + 1st light reflecting portion 20 b 2 ( s + 1 ) is ⁇ ⁇ b (s)
- the s-th light reflector 20 b 2 ( s ) and the s + 1-th light reflector 20 b 2 The distance between (s + 1) and ⁇ ( s s + 1st light reflector 20 b 2 ( s + 1 ) and s + 2nd light reflector 20 b 2 (s + 2) the distance ⁇ (s + 1), the inclination angle of the s-th light reflection part 2 0 b 2) of the inclination angle 0 b (n) and the s + 1-th light reflection part 20 b 2 (s + 1) 0 the difference between b a 0 b (s), s + 1 -th light reflection portion 20 b 2 (s + 1) inclination angle 0 3 ⁇ 4 of (n) and s + 2-th light reflection portion 20 b 2 (s + 2 ), the difference from the inclination angle 0 3 ⁇ 4 (n) is A eb ( s + 1 ), and ⁇ ⁇ b (s) / ⁇ (
- FIG. 11 is a graph showing an example of the inclination angles 0 a ( ⁇ ) and ⁇ b (n) of the light reflecting portion of the lighting device according to the present embodiment.
- the horizontal axis shows the distance X (n) from the end face of the linear light conductor 1 4 to the light reflecting portion 20 a 2, 20 b 2, the vertical axis, the light reflecting portion 20 a 2, 201 ⁇ 2 ⁇ b (n) and ! B (n).
- the change of the inclination angles 0 ( ⁇ ) and ⁇ b (n) of the light reflecting portions 20a 2 and 2013 2 with respect to the change of the distance X (n) is the second embodiment. It is slower than the form.
- the change in the inclination angles 0 3 ( ⁇ ) and ⁇ b (n) of the light reflecting portions 20a 2 and 201 ⁇ 2 with respect to the change in the distance X (n) is moderate. Since the tilt angles ⁇ a ( ⁇ ) and ⁇ b (n) are set respectively, the light intensity distribution can be made more uniform.
- FIG. 12 is a plan view showing the lighting device according to the present embodiment.
- the same components as those of the lighting devices according to the first to third embodiments shown in FIGS. 1 to 10 are denoted by the same reference numerals, and description thereof will be omitted or simplified.
- the illuminating device according to the present embodiment is such that the reflecting means 24 is provided separately from the linear light guide 14 on the reflection side of the linear light guide 14, that is, on the side on which the light reflecting portion 20 is formed. And has the main features.
- a reflection unit 24 is provided on the reflection side of the linear light guide 14, separately from the linear light guide 14.
- the reflection means 24 an aluminum holder or the like that covers at least the reflection side of the linear light guide 14 can be used.
- the reflection coating film 20 on the reflection side of the linear light guide 14 it is possible to prevent light from leaking outside from the reflection side of the linear light guide 14.
- the light leaking from the reflection side of the linear light guide 14 is reduced by the reflecting means 24 provided separately from the linear light guide 14. It is to be returned in body 14.
- the reflection coating film 20 As described above, it is not always necessary to form the reflection coating film 20 on the reflection side of the linear light guide 14, and the reflection means 24 is provided separately from the linear light guide 14 as in the present embodiment. May be provided.
- FIG. 13 is a perspective view of the liquid crystal display device according to the present embodiment.
- the same components as those of the lighting devices according to the first to fourth embodiments shown in FIGS. 1 to 12 are denoted by the same reference numerals, and description thereof will be omitted or simplified.
- the liquid crystal display device is configured by combining the illuminating device according to any of the first to fourth embodiments and a reflective liquid crystal panel.
- an illuminating device 10 As shown in FIG. 13, an illuminating device 10 according to any of the first to fourth embodiments is provided on a reflective liquid crystal panel 26.
- the illumination device 10 functions as a front light.
- the lighting device according to any of the first to fourth embodiments is used.
- the reflective liquid crystal panel can be illuminated with a uniform light intensity. Therefore, according to the present embodiment, a liquid crystal display device having good display characteristics can be provided.
- FIG. 14 is a perspective view of the liquid crystal display device according to the present embodiment.
- the same components as those in the lighting devices according to the first to fifth embodiments and the like shown in FIGS. 1 to 13 are denoted by the same reference numerals, and description thereof will be omitted or simplified.
- the liquid crystal display device is configured by combining the illumination device according to any of the first to fifth embodiments and a transmission type liquid crystal panel.
- a transmissive liquid crystal panel 28 is provided on the lighting device 10 according to any of the first to fourth embodiments.
- the light emitted from the linear light guide 14 enters the transmissive liquid crystal panel 28 via the planar light guide 16, passes through the transmissive liquid crystal panel 28, and is transmitted to the human eye. It is visually recognized by.
- a liquid crystal display device having good display characteristics can be provided even when a transmissive liquid crystal panel is used.
- the inclination angle of the light reflecting portion is set so that light is emitted in a direction perpendicular to the longitudinal direction of the linear light guide. It does not need to be perpendicular to.
- the angle of the tilt angle of the light reflecting portion may be set so that the emitted light is converged to the eyes of the viewer. Further, the angle of the inclination angle of the light reflecting portion may be set so that light is slightly diverged. In short, good display characteristics can be obtained by setting the inclination angle of the light reflecting portion so that light is emitted in a direction substantially perpendicular to the longitudinal direction of the linear light guide.
- the light reflecting portion 20a for reflecting light introduced from the LED 12a and the light reflecting portion 20b for reflecting light introduced from the LED 12b are provided. Although they are formed alternately, they need not necessarily be formed exactly alternately.
- light Two reflection portions 20a are formed adjacent to each other, one light reflection portion 20b is formed next to the reflection portion 20a, and one light reflection portion 20a is formed next to the reflection portion 20a.
- Two b may be formed.
- two light reflecting portions 20a and two light reflecting portions 20b may be formed alternately. That is, the light reflecting portions 20a and the light reflecting portions 20b may be formed substantially alternately.
- the light reflecting portion 20a for reflecting the light introduced from the LED 12a is not provided, and the light reflecting portion for reflecting the light introduced from the LED 12b is not provided.
- a part 20b is provided, and at a position close to the LED 12b, the light introduced from the LED 12a is reflected without providing the light reflection part 20b for reflecting the light introduced from the LED 12b.
- a light reflecting portion 20a for the reflection may be provided.
- a light reflecting portion 20b for reflecting light introduced from the LED 12b is formed at least near the LED 12a, and at least a light reflecting portion 20a for reflecting light introduced from the LED 12a is provided. If it is formed at a position close to the LED 12b, it is possible to prevent the light intensity from being reduced in the region near the end of the linear light guide 14.
- the present invention is suitable for a lighting device and a liquid crystal display device, and is particularly useful for a lighting device capable of illuminating with uniform light intensity and a liquid crystal display device having good display characteristics using the lighting device.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
- Liquid Crystal (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
Description
Claims
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP03707034A EP1531302A4 (en) | 2002-08-23 | 2003-02-25 | LIGHTING DEVICE AND LIQUID CRYSTAL DISPLAY |
| AU2003211655A AU2003211655A1 (en) | 2002-08-23 | 2003-02-25 | Illuminator and liquid crystal display |
| CA002489993A CA2489993C (en) | 2002-08-23 | 2003-02-25 | Lighting apparatus and liquid crystal display |
| US11/010,128 US7108417B2 (en) | 2002-08-23 | 2004-12-10 | Lighting apparatus and liquid crystal display |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002-243188 | 2002-08-23 | ||
| JP2002243188A JP4141766B2 (ja) | 2002-08-23 | 2002-08-23 | 照明装置及び液晶表示装置 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US11/010,128 Continuation US7108417B2 (en) | 2002-08-23 | 2004-12-10 | Lighting apparatus and liquid crystal display |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2004018933A1 true WO2004018933A1 (ja) | 2004-03-04 |
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ID=31944090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2003/002020 Ceased WO2004018933A1 (ja) | 2002-08-23 | 2003-02-25 | 照明装置及び液晶表示装置 |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US7108417B2 (ja) |
| EP (1) | EP1531302A4 (ja) |
| JP (1) | JP4141766B2 (ja) |
| KR (2) | KR100899369B1 (ja) |
| CN (1) | CN100489624C (ja) |
| AU (1) | AU2003211655A1 (ja) |
| CA (1) | CA2489993C (ja) |
| TW (1) | TWI226491B (ja) |
| WO (1) | WO2004018933A1 (ja) |
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2003
- 2003-02-25 AU AU2003211655A patent/AU2003211655A1/en not_active Abandoned
- 2003-02-25 EP EP03707034A patent/EP1531302A4/en not_active Withdrawn
- 2003-02-25 CA CA002489993A patent/CA2489993C/en not_active Expired - Fee Related
- 2003-02-25 WO PCT/JP2003/002020 patent/WO2004018933A1/ja not_active Ceased
- 2003-02-25 KR KR1020097001179A patent/KR100899369B1/ko not_active Expired - Fee Related
- 2003-02-25 KR KR1020077021805A patent/KR100893349B1/ko not_active Expired - Fee Related
- 2003-02-25 CN CNB038174456A patent/CN100489624C/zh not_active Expired - Fee Related
- 2003-03-05 TW TW092104680A patent/TWI226491B/zh not_active IP Right Cessation
-
2004
- 2004-12-10 US US11/010,128 patent/US7108417B2/en not_active Expired - Fee Related
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| JP2002231035A (ja) * | 2001-01-31 | 2002-08-16 | Minebea Co Ltd | 面状照明装置 |
| JP3084161U (ja) * | 2001-08-20 | 2002-03-08 | 勝華科技股▲分▼有限公司 | 面状照明装置 |
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| CN100371787C (zh) * | 2004-06-14 | 2008-02-27 | 友达光电股份有限公司 | 立体影像成像系统 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1531302A1 (en) | 2005-05-18 |
| KR20070112216A (ko) | 2007-11-22 |
| CN1671991A (zh) | 2005-09-21 |
| US20050117324A1 (en) | 2005-06-02 |
| AU2003211655A1 (en) | 2004-03-11 |
| TW200403496A (en) | 2004-03-01 |
| CA2489993C (en) | 2008-04-01 |
| CN100489624C (zh) | 2009-05-20 |
| KR100899369B1 (ko) | 2009-05-27 |
| TWI226491B (en) | 2005-01-11 |
| KR20090024801A (ko) | 2009-03-09 |
| CA2489993A1 (en) | 2004-03-04 |
| KR100893349B1 (ko) | 2009-04-15 |
| EP1531302A4 (en) | 2005-08-31 |
| JP4141766B2 (ja) | 2008-08-27 |
| JP2006024368A (ja) | 2006-01-26 |
| US7108417B2 (en) | 2006-09-19 |
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