WO2010038519A1 - 照明装置、表示装置、及びテレビ受信装置 - Google Patents
照明装置、表示装置、及びテレビ受信装置 Download PDFInfo
- Publication number
- WO2010038519A1 WO2010038519A1 PCT/JP2009/061191 JP2009061191W WO2010038519A1 WO 2010038519 A1 WO2010038519 A1 WO 2010038519A1 JP 2009061191 W JP2009061191 W JP 2009061191W WO 2010038519 A1 WO2010038519 A1 WO 2010038519A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light
- light guide
- led
- guide plate
- parallel
- Prior art date
Links
Images
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
- G02B6/0075—Arrangements of multiple light guides
- G02B6/0078—Side-by-side arrangements, e.g. for large area displays
- G02B6/008—Side-by-side arrangements, e.g. for large area displays of the partially overlapping type
-
- 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
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0086—Positioning aspects
- G02B6/0091—Positioning aspects of the light source relative to 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
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
-
- 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
- G02B6/002—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 by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
- G02B6/0021—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 by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces for housing at least a part of the light source, e.g. by forming holes or recesses
-
- 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
- G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
-
- 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
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
-
- 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
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133608—Direct backlight including particular frames or supporting means
-
- 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
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133611—Direct backlight including means for improving the brightness uniformity
Definitions
- the present invention relates to a lighting device, a display device, and a television receiver.
- liquid crystal display device requires a backlight device as a separate illumination device because the liquid crystal panel used for this does not emit light.
- Patent Document 1 As an example of a liquid crystal display device that is designed to be thin and large, one described in Patent Document 1 below is known.
- This is an LED having a light emitting surface that emits light in a direction substantially parallel to the display surface of the liquid crystal panel, and a light incident surface on the side edge (side edge) that faces the LED and receives light from the LED.
- a light guide plate having a light emission surface for emitting light toward the display surface of the liquid crystal panel on the upper surface, and a plurality of light guide plates and LEDs are arranged side by side in parallel.
- a reflection layer that reflects light in the light guide plate and propagates it to the light exit surface is formed on the opposing surface of the adjacent light guide plates.
- the present invention has been completed based on the above situation, and an object thereof is to prevent uneven brightness.
- the illuminating device of the present invention includes a light source, a light incident surface that is arranged to face the light source, and receives light from the light source, and is parallel to the alignment direction of the light source and the light incident surface and light. And a plurality of light guides arranged in parallel in a direction parallel to the light emission surface and intersecting the alignment direction, and interposed between the adjacent light guides And a low refractive index layer having a refractive index lower than that of the light guide, and a scattering structure that is formed at a boundary surface between the light guide and the low refractive index layer and scatters light in the light guide.
- the light emitted from the light source When the light emitted from the light source is incident on the light incident surface of the light guide, it propagates through the light guide and is emitted from the light exit surface to the outside.
- the light propagating through the light guide hits the boundary surface of the light guide with the low refractive index layer, the light is scattered by the scattering structure formed there.
- the scattered light includes light that does not exceed the critical angle with respect to the boundary surface, and the light is emitted to the outside of the light guide.
- the scattering structure includes a large number of microscopic concave portions or convex portions.
- the light in the light guide can be favorably scattered by a large number of microscopic concave portions or convex portions.
- microscopic means that it is difficult to recognize a specific shape only by looking at the outer shape, and that the specific shape can be finally recognized using a magnifying glass or a microscope.
- the scattering structure has an irregular shape or arrangement in the concave portion or the convex portion. In this way, the directivity of light emitted from the boundary surface can be reduced or eliminated. Thereby, it is possible to make it difficult for luminance unevenness to occur in a region between adjacent light guides.
- the concave portion or the convex portion is formed by performing a blasting process on the boundary surface.
- blasting refers to a process of grinding a surface to be processed by colliding with a blasting material made of fine particles harder than the surface to be processed with compressed air or the like.
- the scattering structure is formed by regularly arranging the concave portions or the convex portions in parallel. In this way, the amount of light emitted from the boundary surface can be easily controlled.
- the light guide is resin-molded using a molding die, and the concave portion or the convex portion is molded by the molding die. In this way, since it is not necessary to perform special processing for forming regular concave portions or convex portions, cost reduction can be achieved.
- the concave portion or the convex portion is formed such that a distribution density at the boundary surface is continuously increased gradually in a direction away from the light source with respect to an arrangement direction of the light source and the light incident surface. .
- the amount of light in the light guide is relatively greater on the side closer to the light source than on the far side with respect to the alignment direction of the light source and the light incident surface. Therefore, for the distribution density of the recesses or projections formed on the boundary surface, the side closer to the light source with a large amount of light is relatively lowered to suppress light emission, while the side far from the light source with a small amount of light is relatively high.
- the amount of light emitted to the region between adjacent light guides can be made uniform in the arrangement direction. Thereby, it becomes more suitable for prevention of luminance unevenness.
- the boundary surface is considered to be a macroscopic face.
- the low refractive index layer to be secured can be designed to be thin. Thereby, a dark part becomes still more difficult to produce in the area
- the term “macroscopic” as used herein refers to the extent that a specific shape can be easily recognized by looking at the outer shape.
- a plurality of the light sources are provided, and the light guide body is provided with a plurality of light incident surfaces corresponding to the plurality of light sources, and the light emitting surfaces are formed as the plurality of light incident surfaces.
- a slit is formed corresponding to the slit, and the low refractive index layer is present in the slit, and the boundary surface between the light guide and the low refractive index layer present in the slit is A scattering structure is provided. In this way, the light emitted from each light source enters each individual light incident surface and then exits from the individual light exit surfaces divided by the slits.
- the light guide Since light in the light guide is emitted to the slit side by the scattering structure from the boundary surface with the low refractive index layer present in the slit of the light guide, it is possible to suppress the formation of dark portions in the slit formation region. Can do.
- the light guide corresponds to a plurality of light sources, it is excellent in workability when the light guides are arranged in parallel, and is particularly suitable for a large lighting device.
- a plurality of the light guides are arranged in parallel in the arrangement direction of the light source and the light incident surface. In this way, it is possible to make it difficult for luminance unevenness to occur in the entire lighting device in which the light guide and its light exit surface are two-dimensionally arranged in parallel.
- the scattering structure is provided on a surface adjacent to both the light emitting surface and the boundary surface.
- the scattering structure provided on the surface adjacent to both the light exit surface and the boundary surface of the light guide allows the region between the light guides parallel to the alignment direction of the light source and the light incident surface. Since light can be emitted, it is possible to further prevent luminance unevenness.
- the light guide includes a light exit portion having the light exit surface, and a light guide that is interposed between the light incident surface and the light exit portion and guides light incident from the light entrance surface to the light exit portion.
- the light output part is arranged so as to overlap in a plan view with respect to the light guide part of the light guide adjacent to the light source and the light incident surface in the arrangement direction. In this way, the light incident on the light incident surface is propagated through the light guide portion and then emitted from the light exit surface of the light exit portion, so that the luminance distribution in the light exit surface can be made uniform. it can.
- Uniform brightness distribution of the entire lighting device by superimposing the light output part on the light guide part that does not have a light output surface, and paralleling the light output surface in the direction of alignment of the light source and the light incident surface Can do.
- the scattering structure is formed in the light output part except for the light guide part. In this way, since the light guide unit where the light output unit overlaps in plan view is not provided with a scattering structure, it is possible to prevent the amount of light emitted from the boundary surface from becoming excessive. Thereby, it is possible to prevent luminance unevenness in a region between adjacent light guides while sufficiently securing the amount of light emitted from the light exit surface.
- the boundary surface of the light guide has a macroscopic uneven shape, and the boundary surfaces of the light guides facing each other have a complementary shape. If it does in this way, the field between adjacent light guides can be made harder to be visually recognized as a dark part.
- the low refractive index layer is an air layer. This eliminates the need for a special member for forming the low refractive index layer, and thus can cope with low cost.
- the light source is a light emitting diode. In this way, it is possible to increase the brightness.
- a display device of the present invention includes the above-described illumination device and a display panel that performs display using light from the illumination device.
- the illumination device that supplies light to the display panel has an excellent display quality because a dark portion is suppressed from being generated between the light guides and the luminance distribution is uniform. Display can be realized.
- a liquid crystal panel can be exemplified as the display panel.
- Such a display device can be applied as a liquid crystal display device to various uses such as a display of a television or a personal computer, and is particularly suitable for a large screen.
- FIG. 1 is an exploded perspective view showing a schematic configuration of a television receiver according to Embodiment 1 of the present invention.
- Sectional drawing which expands and shows a central part by cut
- the top view which shows the arrangement state of a light-guide plate Top view of the light guide plate Bottom view of light guide plate Side view of light guide plate Side sectional view of light guide plate cut by slit
- An enlarged cross-sectional view of the front side portion of the side end face of the light emitting portion The side view of the light-guide plate which concerns on Embodiment 2 of this invention.
- Enlarged cross-sectional view of the rear portion of the side end face of the light emitting part An enlarged cross-sectional view of the front side portion of the side end face of the light emitting portion The expanded sectional view of the rear side part among the side end surfaces of the light emission part which concerns on Embodiment 3 of this invention.
- An enlarged cross-sectional view of the front side portion of the side end face of the light emitting portion The expanded sectional view of the rear side part among the side end surfaces of the light emission part which concerns on Embodiment 4 of this invention.
- An enlarged cross-sectional view of the front side portion of the side end face of the light emitting portion The expanded sectional view of the rear side part among the side end surfaces of the light emission part which concerns on Embodiment 5 of this invention.
- An enlarged cross-sectional view of the front side portion of the side end face of the light emitting portion The enlarged view which looked at the light-guide plate which concerns on Embodiment 6 of this invention from the front.
- Side cross-sectional view of parallel light guide plates The enlarged view which looked at the light-guide plate which concerns on Embodiment 7 of this invention from the front.
- the top view which shows the parallel state of the light-guide plate which concerns on Embodiment 8 of this invention.
- Side view of light guide plate The side view of the light-guide plate which concerns on other embodiment (1) of this invention.
- Side view of a light guide plate according to another embodiment (2) of the present invention Side view of a light guide plate according to another embodiment (3) of the present invention
- Liquid crystal display device (display device) 11 ... Liquid crystal panel (display panel) 12 ... Backlight device (lighting device) 16 ... LED (light source, light emitting diode) 18.
- Light guide 34 ... Light incident surface 36 ... Light exit surface 42 ... Slit 47, 52 ... Rough surface (scattering structure) 48, 50 ... concave portion (scattering structure) 49, 51, 53 ... convex portion (scattering structure) AR ... Air layer (low refractive index layer) TV ... TV receiver
- FIGS. 1 A first embodiment of the present invention will be described with reference to FIGS.
- the liquid crystal display device 10 is illustrated.
- a part of each drawing shows an X axis, a Y axis, and a Z axis, and each axis direction is drawn to be a direction shown in each drawing.
- the upper side shown in FIGS. 4 to 11 is the front side, and the lower side is the back side.
- the television receiver TV includes a liquid crystal display device 10 (display device), front and back cabinets Ca and Cb that are accommodated so as to sandwich the liquid crystal display device 10, and a power source P.
- a tuner T is provided, and the display surface 11a is supported by the stand S along the vertical direction (Y-axis direction).
- the liquid crystal display device 10 has a horizontally long rectangular shape as a whole, and includes a liquid crystal panel 11 as a display panel and a backlight device 12 (illumination device) as an external light source, as shown in FIG. It is integrally held by a bezel 13 or the like having a shape.
- the display surface 11a is along the vertical direction” is not limited to an aspect in which the display surface 11a is parallel to the vertical direction, and the display surface 11a is installed in a direction along the vertical direction relative to the direction along the horizontal direction.
- it is meant to include those inclined at 0 ° to 45 °, preferably 0 ° to 30 ° with respect to the vertical direction.
- the liquid crystal panel 11 and the backlight device 12 constituting the liquid crystal display device 10 will be described sequentially.
- the liquid crystal panel (display panel) 11 has a rectangular shape in plan view, and a pair of glass substrates are bonded together with a predetermined gap therebetween, and liquid crystal is sealed between the glass substrates. It is said.
- One glass substrate is provided with a switching element (for example, TFT) connected to a source wiring and a gate wiring orthogonal to each other, a pixel electrode connected to the switching element, an alignment film, and the like.
- the substrate is provided with a color filter and counter electrodes in which colored portions such as R (red), G (green), and B (blue) are arranged in a predetermined arrangement, and an alignment film.
- a polarizing plate is disposed outside both substrates (see FIG. 5 and the like).
- the backlight device 12 roughly includes a chassis 14 having a substantially box shape opened on the front side (the liquid crystal panel 11 side, the light emitting side), and an opening of the chassis 14.
- An optical member 15 disposed, an LED 16 (Light Emitting Diode) as a light source disposed in the chassis 14, an LED board 17 on which the LED 16 is mounted, and light emitted from the LED 16 toward the optical member 15 side.
- a light guide plate 18 for guiding.
- the backlight device 12 is generated in association with the light emission of the LED 16, the receiving member 19 that receives the diffusion plates 15 a and 15 b constituting the optical member 15 from the back side, the pressing member 20 that presses the diffusion plates 15 a and 15 b from the front side. And a heat dissipating member 21 for promoting heat dissipation.
- the backlight device 12 has a configuration in which the LEDs 16 are arranged on the side end portion (side edge) of the light guide plate 18 and a large number of unit light emitters composed of a set of the LED 16 and the light guide plate 18 arranged in parallel with each other are arranged in parallel.
- a large number of unit light emitters (20 in FIG. 3) are juxtaposed along the parallel direction (Y-axis direction) of the LED 16 and the light guide plate 18 and arranged in tandem (see FIG. 3). 7 to 9).
- the backlight device 12 includes a large number of unit light emitters arranged in tandem in a direction substantially perpendicular to the tandem arrangement direction (Y-axis direction) and along the display surface 11a (X-axis direction).
- the chassis 14 is made of metal, and as shown in FIG. 4, the bottom plate 14a has a rectangular shape, the side plate 14b rises from the outer end of each side of the bottom plate 14a, and the rising end of each side plate 14b. And a receiving plate 14c projecting outward from the bottom, and as a whole, has a shallow substantially box shape (substantially shallow dish shape) opened toward the front side.
- the long side direction of the chassis 14 coincides with the horizontal direction (X-axis direction), and the short side direction coincides with the vertical direction (Y-axis direction).
- a receiving member 19 and a pressing member 20 can be placed on each receiving plate 14c in the chassis 14 from the front side.
- Each receiving plate 14c is formed with a mounting hole 14d for screwing the bezel 13, the receiving member 19 and the pressing member 20 at a predetermined position, one of which is shown in FIG. Further, the long side receiving plate 14c is folded back so that the outer edge portion thereof is parallel to the side plate 14b (FIG. 4).
- an insertion hole 14e for passing a clip 23 for attaching the light guide plate 18 is formed through the bottom plate 14a at a predetermined position (FIGS. 5 and 6). Note that a mounting hole (not shown) for screwing the LED board 17 is formed through the bottom plate 14a at a predetermined position.
- the optical member 15 is interposed between the liquid crystal panel 11 and the light guide plate 18, and is disposed on the liquid crystal panel 11 side with diffusion plates 15 a and 15 b disposed on the light guide plate 18 side. And an optical sheet 15c.
- the diffusing plates 15a and 15b have a configuration in which a large number of diffusing particles are dispersed in a transparent resin base material having a predetermined thickness, and have a function of diffusing transmitted light.
- Two diffuser plates 15a and 15b having the same thickness are stacked and arranged.
- the optical sheet 15c has a sheet shape that is thinner than the diffusion plates 15a and 15b, and three optical sheets are laminated. Specifically, the optical sheet 15c is a diffusion sheet, a lens sheet, and a reflective polarizing sheet in order from the diffusion plates 15a and 15b side (back side).
- the receiving member 19 is arranged on the outer peripheral end of the chassis 14 and can receive the outer peripheral end of the diffusion plates 15a and 15b over substantially the entire periphery. As shown in FIG. 3, the receiving member 19 includes a pair of short side receiving members 19 ⁇ / b> A extending along each short side portion of the chassis 14, and two long side sides extending along each long side portion. It has receiving members 19B and 19C. Each receiving member 19 has a different form depending on each installation location. When the receiving members 19 are distinguished, the suffixes A to C are added to the symbols of the receiving members, respectively, and when the generic names are not distinguished, the suffix is not added to the symbols. .
- both short side receiving members 19A have substantially the same structure, and both have a substantially L-shaped cross section extending along the inner wall surfaces of the short side receiving plate 14c and the side plate 14b. I am doing. Of the portions parallel to the receiving plate 14c in both the short side receiving members 19A, the inner portion receives the back diffusion plate 15b, while the outer portion receives a short side pressing member 20A described later. Further, both short side receiving members 19A cover the short side receiving plate 14c and side plate 14b over substantially the entire length.
- the long side receiving members 19B and 19C are different from each other.
- the first long side receiving member 19B disposed on the lower side (vertical direction lower side) shown in FIG. 3 in the chassis 14 is, as shown in FIG. 7, the inner wall surface of the long side receiving plate 14c, And it is set as the form extended along the surface (surface on the opposite side to the LED board 17 side) of the light guide plate 18 adjacent to it. That is, the first long side receiving member 19B has a function of pressing the adjacent light guide plate 18 from the front side.
- the inner end receives the front diffusion plate 15a, while the outer portion receives a first long side pressing member 20B described later.
- a step portion 19Ba adapted to the outer edge of the front diffusion plate 15a is formed at the inner end of the first long side receiving member 19B.
- a recess 19Bb that receives the protrusion 20Bc of the first long side pressing member 20B is formed at a position adjacent to the outside of the step portion 19Ba in the first long side receiving member 19B.
- the first long side receiving member 19B is configured to cover the long side receiving plate 14c and the non-light emitting portions (the substrate mounting portion 30 and the light guiding portion 32) of each light guide plate 18 adjacent thereto over almost the entire length. The Note that the width of the first long side receiving member 19B is wider than the other receiving members 19A and 19C by an amount covering the non-light emitting portion of the light guide plate 18.
- the second long side receiving member 19C disposed on the upper side (vertical upper side) shown in FIG. 3 in the chassis 14 extends along the inner wall surfaces of the receiving plate 14c, the side plate 14b, and the bottom plate 14a, as shown in FIG.
- the existing cross section has a substantially crank shape.
- a portion parallel to the receiving plate 14c is formed by knocking out a diffusion plate receiving projection 19Ca having a substantially arc-shaped cross section protruding toward the front side. It abuts against the plate 15b from the back side.
- the second long side receiving member 19C a portion parallel to the bottom plate 14a is formed with a light guide plate receiving protrusion 19Cb having a substantially arc-shaped cross section protruding toward the front side.
- the light guide plate 18 is contacted from the back side. That is, the second long side receiving member 19 ⁇ / b> C has both a function of receiving (supporting) the diffusion plates 15 a and 15 b and a function of receiving the light guide plate 18.
- a portion of the second long side receiving member 19C that is parallel to the receiving plate 14c and that is inward of the diffusion plate receiving protrusion 19Ca is in contact with the front end of the light guide plate 18 from the back side.
- the light guide plate 18 can be supported at two points together with the light guide plate receiving protrusion 19 ⁇ / b> Cb that abuts the base side portion of the light guide plate 18.
- the second long side receiving member 19C is configured to cover the long side receiving plate 14c and the side plate 14b over substantially the entire length.
- a projecting piece 19Cc facing the end surfaces of both diffusion plates 15a, 15b is formed to rise from the outer end of the second long side receiving member 19C.
- the holding member 20 is disposed at the outer peripheral end of the chassis 14, and the width dimension thereof is sufficiently smaller than the short side dimension of the chassis 14 and the diffusion plates 15 a and 15 b, so that the diffusion plate 15 a It is possible to locally press the outer peripheral end.
- the holding member 20 includes a short side holding member 20A arranged one by one on both short sides of the chassis 14 and a plurality of long side holding members 20B, 20C arranged on both long sides. Yes.
- Each pressing member 20 has a different form depending on each installation location.
- suffixes A to C are attached to the reference numerals of the pressing members, respectively, and when referring generically without distinction, the suffix is not attached to the reference sign. .
- Both short-side holding members 20A are arranged at substantially the center position of both short-side portions of the chassis 14, and are screwed in a state of being placed on the outer end portions of both short-side receiving members 19A. .
- both short-side holding members 20 ⁇ / b> A have holding pieces 20 ⁇ / b> Aa that protrude inward from the screwed main body portion, and the diffusion plate is formed by the tip of the holding pieces 20 ⁇ / b> Aa.
- 15a can be pressed from the front side.
- the liquid crystal panel 11 is placed on the pressing piece from the front side, and the liquid crystal panel 11 can be held between the presser piece and the bezel 13. Further, a buffer material 20Ab for the liquid crystal panel 11 is disposed on the front side surface of the pressing piece 20Aa.
- the long side pressing members 20B and 20C are different from each other.
- the first long side pressing member 20B disposed on the lower side (vertical direction lower side) shown in FIG. 3 in the chassis 14 is, as shown in FIG. Are arranged at approximately equal intervals at three positions of the substantially central position and the both side positions, and are screwed in a state of being placed on the outer end portion of the first long side receiving member 19B.
- the first long side pressing member 20B has a pressing piece 20Ba on the inner end side, like the short side pressing member 20A, and the back side surface of the pressing piece 20Ba is The diffusion plate 15a is pressed down, and the front surface can receive the liquid crystal panel 11 via the buffer material 20Bb.
- first long side pressing member 20B has a larger width dimension than the other pressing members 20A and 20C so as to be compatible with the first long side receiving member 19B, and on the back side, A projection 20Bc is provided for positioning with respect to the first long side receiving member 19B.
- the second long side pressing member 20 ⁇ / b> C arranged on the upper side (vertical upper side) shown in FIG. 3 in the chassis 14 is at two positions eccentric in the upper long side portion of the chassis 14 in the same figure. In addition, it is screwed in a state where it is placed directly on the receiving plate 14 c of the chassis 14.
- the second long side pressing member 20C has a pressing piece 20Ca on the inner end side, like the short side pressing member 20A and the first long side pressing member 20B.
- the back side surface of the pressing piece 20Ca presses the diffusion plate 15a, and the front side surface can receive the liquid crystal panel 11 via the cushioning material 20Cb.
- a cushioning material 20Cc different from the above is interposed between the pressing piece 20Ca and the bezel 13 in the second long side pressing member 20C.
- the heat dissipating member 21 is made of a synthetic resin material or a metal material having excellent heat conductivity and has a sheet shape. As shown in FIGS. There is something to be arranged. Of the heat dissipating member 21, the one disposed in the chassis 14 is interposed between the bottom plate 14 a of the chassis 14 and the LED substrate 17, and is provided with notches for allowing other members to escape. On the other hand, the heat radiating member 21 disposed outside the chassis 14 is attached to the back surface of the bottom plate 14 a of the chassis 14.
- the LED 16 is a so-called surface mount type that is surface mounted on the LED substrate 17 as shown in FIG.
- the LED 16 has a horizontally long and substantially block shape as a whole, and is a side light emitting type in which a side surface adjacent to a mounting surface (a bottom surface in contact with the LED substrate 17) with respect to the LED substrate 17 is a light emitting surface 16a.
- the optical axis LA of the LED 16 is set to be substantially parallel to the display surface 11a of the liquid crystal panel 11 (the light emitting surface 36 of the light guide plate 18) (FIGS. 7 and 10).
- the optical axis LA of the LED 16 coincides with the short side direction (Y-axis direction) of the chassis 14, that is, the vertical direction, and the light emission direction (light emission direction from the light emitting surface 16a) is upward in the vertical direction. (FIGS. 3 and 7).
- the light emitted from the LED 16 spreads radially to some extent within a predetermined angle range around the optical axis LA, but its directivity is higher than that of a cold cathode tube or the like. That is, the light emission intensity of the LED 16 exhibits an angular distribution in which the direction along the optical axis LA is conspicuously high and rapidly decreases as the tilt angle with respect to the optical axis LA increases.
- the longitudinal direction of the LED 16 coincides with the long side direction (X-axis direction) of the chassis 14.
- the LED 16 has a plurality of LED chips 16c, which are light emitting elements, mounted on a substrate portion 16b disposed on the opposite side (back side) of the light emitting surface 16a, and is surrounded by a housing 16d and is enclosed in the housing 16d. The space is sealed with the resin material 16e.
- the LED 16 includes three types of LED chips 16c having different main emission wavelengths. Specifically, each LED chip 16c emits R (red), G (green), and B (blue) in a single color. It has become. Each LED chip 16 c is arranged in parallel along the longitudinal direction of the LED 16.
- the housing 16d has a horizontally long and substantially cylindrical shape exhibiting white with excellent light reflectivity. Further, the back surface of the substrate portion 16b is soldered to the land on the LED substrate 17.
- the LED substrate 17 is made of a synthetic resin whose surface (including the surface facing the light guide plate 18) is white with excellent light reflectivity. As shown in FIG. 3, the LED substrate 17 has a rectangular plate shape in plan view, and its long side dimension is set to be sufficiently smaller than the short side dimension of the bottom plate 14a. It is possible to partially cover the bottom plate 14a.
- a plurality of LED substrates 17 are arranged in a plane in a grid pattern in the plane of the bottom plate 14 a of the chassis 14. Specifically, in FIG. 3, a total of 25 LED substrates 17 are arranged in parallel, 5 in the long side direction of the chassis 14 and 5 in the short side direction.
- a wiring pattern made of a metal film is formed on the LED substrate 17 and the LED 16 is mounted at a predetermined position.
- An external control board (not shown) is connected to the LED board 17, and power necessary for lighting the LED 16 is supplied from the LED board 17, and drive control of the LED 16 is possible.
- a large number of LEDs 16 are arranged in a grid pattern on the LED substrate 17, and the arrangement pitch thereof corresponds to the arrangement pitch of light guide plates 18 described later. Specifically, a total of 32 LEDs 16 are arranged in parallel, 8 in the long side direction and 4 in the short side direction on the LED substrate 17.
- a photo sensor 22 is mounted on the LED substrate 17, and by detecting the light emission state of each LED 16 by the photo sensor 22, each LED 16 can be feedback controlled (FIG. 4). And FIG. 11).
- the LED board 17 has an attachment hole 17a (FIG. 6) for receiving the clip 23 for attaching the light guide plate 18 and a positioning hole 17b (FIG. 10) for positioning the light guide plate 18, respectively. Are provided according to the mounting position.
- the light guide plate 18 is made of a synthetic resin material (for example, polycarbonate) having a refractive index sufficiently higher than that of air and substantially transparent (excellent translucency). As shown in FIGS. 7 to 9, the light guide plate 18 introduces light emitted from the LEDs 16 in the vertical direction (Y-axis direction) and propagates the light inside (ZZ side) (Z It has a function of rising and emitting in the direction of the axial direction. As shown in FIG.
- the light guide plate 18 is formed in a plate shape having a rectangular shape in plan view as a whole, and its long side direction is the optical axis LA (light emission direction) of the LED 16 and the short side direction of the chassis 14 ( The short side direction is parallel to the long side direction (X axis direction, horizontal direction) of the chassis 14.
- the cross-sectional structure along the long side direction in the light guide plate 18 will be described in detail.
- the light guide plate 18 has one end side (the LED 16 side) in the long side direction serving as a board mounting portion 30 attached to the LED board 17, whereas the other end in the long side direction.
- the light emitting part 31 is capable of emitting light toward the diffuser plates 15a and 15b, and the light emitting part 31 emits light with little light exiting between the substrate mounting part 30 and the light emitting part 31. It is set as the light guide part 32 which can be led to. That is, the board mounting part 30 (LED 16), the light guide part 32, and the light output part 31 are sequentially arranged in parallel from the LED 16 side along the long side direction of the light guide plate 18, that is, the optical axis LA (light emission direction) of the LED 16. It can be said that.
- the substrate mounting portion 30 and the light guide portion 32 are non-light emitting portions, whereas the light output portion 31 is a light emitting portion.
- the direction from the board mounting part 30 toward the light emitting part 31 (light emission direction of the LED 16, right direction shown in FIGS. The description will be made assuming that the left direction in FIGS.
- An LED housing hole 33 for housing the LED 16 is formed through the Z-axis direction at the front end position of the board mounting portion 30, and a surface (front surface) of the inner peripheral surface facing the light emitting surface 16 a of the LED 16 is formed.
- a light incident surface 34 on which light from the LED 16 is incident is formed.
- the light incident surface 34 is disposed at the boundary position between the substrate mounting portion 30 and the light guide portion 32.
- the outer peripheral surface of the light guide 32 is substantially smooth throughout the entire area, and light is not diffusely reflected at the interface with the external air layer AR. Since the incident angle with respect to the interface almost exceeds the critical angle, the light is guided to the light output portion 31 side while repeating total reflection.
- each LED chip 16c constituting the LED 16 emits R, G, B monochromatic light. In the process of propagating through the light guide 32, the three monochromatic lights are mixed with each other. The white light is led to the light output unit 31.
- the luminance distribution in the light emitting surface 36 can be made uniform.
- the light guide 32 is inserted into the positioning hole 17b of the LED board 17 at a position near the board mounting part 30 (near the rear end part), so that the X axis direction and the Y axis direction with respect to the LED board 17
- a positioning projection 35 capable of positioning the light guide plate 18 is provided so as to protrude to the back side.
- the light emitting surface 36 is a surface facing the front side of the light emitting portion 31, that is, almost the entire surface facing the diffusion plate 15 b.
- the light exit surface 36 is a substantially smooth surface and is substantially parallel to the plate surfaces of the diffusion plates 15a and 15b (the display surface 11a of the liquid crystal panel 11), and is substantially orthogonal to the light incident surface 34. Yes.
- a scattering surface that scatters light at the interface by applying a fine unevenness to the back surface (the surface opposite to the light emitting surface 36, the surface facing the LED substrate 17) of the light emitting portion 31. 37 is formed.
- the scattering surface 37 is formed by arranging a large number of grooves 37 a extending linearly along the short side direction of the light guide plate 18 at predetermined intervals, and the arrangement pitch (arrangement interval) of the grooves 37 a is the rear end of the light emitting unit 31. As it goes from the front end side to the front end side (front end side), it gradually becomes narrower (FIG. 13).
- the groove 37a constituting the scattering surface 37 has a lower density on the rear end side, that is, the side where the distance from the LED 16 is smaller (closer side), and is higher on the front end side, that is, the side where the distance from the LED 16 is larger (the far side). They are arranged so as to have a density, which is a gradation arrangement. Thereby, for example, it is possible to prevent a luminance difference from occurring between the side where the distance from the LED 16 is small and the side where the distance is large in the light emitting part 31, and a uniform luminance distribution can be obtained in the plane of the light emitting surface 36. It has become.
- the scattering surface 37 is provided over almost the entire area of the light output part 31, and the almost entire area overlaps with the light emitting surface 36 in a plan view.
- a reflection sheet 24 that reflects light toward the inside of the light guide plate 18 is disposed on the back side surfaces (including the scattering surface 37) of the light output unit 31 and the light guide unit 32.
- the reflection sheet 24 is made of a synthetic resin having a white surface with excellent light reflectivity, and is disposed in a region corresponding to substantially the entire area of the light output portion 31 and the light guide portion 32 when viewed in plan ( FIG. 13).
- the reflection sheet 24 can reliably prevent light propagating in the light guide plate 18 from leaking to the back side, and can efficiently raise the light scattered on the scattering surface 37 to the light emitting surface 36 side. it can.
- the reflection sheet 24 is bonded to the light guide plate 18 by a transparent adhesive at a plurality of positions on the side end positions, that is, positions where it is difficult to optically interfere with the light propagating in the light guide plate 18. Further, the reflection sheet 24 is provided with a hole through which the positioning protrusion 35 is passed at a position corresponding to the positioning protrusion 35.
- the front side surface (including the surface facing the diffusion plates 15 a and 15 b and the light emitting surface 36) and the back side surface (facing the LED substrate 17) of the light guide plate 18 are respectively X Parallel surfaces 38 and 41 that are substantially parallel to the axial direction and the Y-axis direction (display surface 11a) and inclined surfaces 39 and 40 that are inclined with respect to the X-axis direction and the Z-axis direction are formed.
- the back surface of the substrate mounting portion 30 is a mounting surface for the LED substrate 17 and is a parallel surface 38 (a surface parallel to the main plate surface of the LED substrate 17) in order to stabilize the mounting state.
- the back surface of the light guide unit 32 and the light output unit 31 is a continuous inclined surface 39. Therefore, among the light guide plates 18, the substrate mounting portion 30 is fixed in contact with the LED substrate 17, but the light guide portion 32 and the light output portion 31 are lifted from the LED substrate 17, and the LED substrate 17 is in a non-contact state. That is, the light guide plate 18 is supported in a cantilevered manner with the substrate attachment portion 30 on the rear end side as a base end (fulcrum) and the front end side as a free end.
- the surface on the front side of the entire area of the substrate mounting portion 30 and the light guide portion 32 and the portion of the light output portion 31 near the light guide portion 32 is a continuous inclined surface 40. Since the inclined surface 40 is substantially parallel to each other at substantially the same inclination angle as the inclined surface 39 on the back side, the entire area of the light guide portion 32 and the portion near the light guide portion 32 (side closer to the LED 16) in the light output portion 31 have a plate thickness. Is almost constant. On the other hand, the surface on the front side of the light emitting portion 31 near the front end (the side far from the LED 16) is a parallel surface 41.
- the light exit surface 36 includes a parallel surface 41 and an inclined surface 40, the most part near the front end is the parallel surface 41, and a part near the light guide part 32 is the inclined surface 40.
- the board attachment portion 30 has a tapered shape in which the plate thickness gradually decreases as it goes to the rear end side (as it moves away from the light guide portion 32).
- the light exiting portion 31 has a constant thickness because the surface on the front side is the inclined surface 40 for the portion adjacent to the light guide portion 32, but the surface on the front side is a parallel surface 41 for the front portion. Therefore, it has a tapered shape in which the plate thickness gradually decreases as it goes to the front end side (as it moves away from the light guide portion 32).
- the front-side parallel surface 41 has a length dimension (dimension in the Y-axis direction) shorter than the back-side parallel surface 38. Therefore, the front end portion of the light exiting portion 31 has a thickness dimension smaller than that of the rear end portion of the substrate mounting portion 30, and the front end surface (front end surface) of the light exiting portion 31 has a surface area larger than that of the rear end surface of the substrate mounting portion 30. It is getting smaller.
- the outer peripheral end face (including both end faces and the front end face) of the light guide plate 18 is macroscopically confronted in plan view over the entire area.
- the term “macroscopic” as used herein refers to the extent that a specific shape can be easily recognized by looking at the outer shape.
- the light guide plate 18 having the above-described cross-sectional structure has a pair of LED housing holes 33 for housing the LEDs 16 as shown in FIG. 12, and light from two different LEDs 16 is incident on it. Regardless, the light emitted from each LED 16 can be guided to the diffusion plates 15a and 15b in an optically independent state.
- FIG. 12 it explains in detail with the plane arrangement of each component part in light guide plate 18.
- the light guide plate 18 has a symmetrical shape centered on a symmetrical axis passing through the center position in the short side direction (X-axis direction).
- a pair of the LED housing hole 33 and the light incident surface 34 of the substrate mounting portion 30 are disposed symmetrically at positions shifted by a predetermined distance from the center position in the short side direction (X-axis direction) of the light guide plate 18. ing.
- Each LED accommodation hole 33 has a substantially rectangular shape that is horizontally long when seen in a plan view, and is slightly larger than the outer shape of the LED 16.
- the LED housing hole 33 has a height dimension (dimension in the Z-axis direction) and a width dimension (dimension in the X-axis direction) that is slightly larger than that of the LED 16, and the surface area of the light incident surface 34 is larger than that of the light emitting surface 16 a of the LED 16. Is sufficiently large so that the radial light emitted from the LED 16 can be taken in without any excess.
- the LED 16 is arranged in a state where a predetermined gap is provided over the entire circumference with respect to the inner peripheral surface (including the light incident surface 34) in the LED accommodating hole 33.
- This gap is secured, for example, to absorb an assembly error that occurs when the light guide plate 18 is assembled to the LED substrate 17.
- the gap is also required to allow the light guide plate 18 to thermally expand due to heat generated when the LED 16 emits light.
- a slit 42 that divides the light guide part 32 and the light output part 31 into right and left is provided at the center position in the short side direction of the light guide plate 18.
- the slit 42 penetrates the light guide plate 18 in the thickness direction (Z-axis direction) and has a constant width in a form that opens forward along the Y-axis direction.
- the slit 42 divides the light guide section 32 into a pair of divided light guide sections 32S, and the light output section 31 and the light output surface 36 into a pair of divided light output sections 31S and a divided light output surface 36S, respectively. .
- the end face of the light guide plate 18 facing the slit 42 constitutes the side end face of each divided light guide section 32S and each divided light output section 31S and is macroscopically confronted in plan view.
- the side end surface of each divided light guide 32S is substantially smooth, the light in each divided light guide 32S is totally reflected at the boundary surface with the air layer AR present in the slit 42. Therefore, light is prevented from passing and mixing between the divided light guide portions 32S facing each other across the slit 42. Thereby, the optical independence in each division
- the width dimension (groove width) of the slit 42 is sufficiently large so that the air layer AR can be reliably secured in consideration of manufacturing errors when the light guide plate 18 is manufactured and the expansion amount due to thermal expansion. Is set.
- the rear end position of the slit 42 is slightly forward of the positioning protrusion 35 and the irradiation area in the X-axis direction of each LED 16 (the angle range between the alternate long and short dash lines around the optical axis LA of the LED 16 shown in FIG. ) Is set behind. Thereby, it is avoided that the light emitted from each LED 16 directly enters the adjacent divided light guide portion 32S that is not the irradiation target.
- the pair of positioning projections 35 are located behind the irradiation region in the X-axis direction of each LED 16 at the outer end of the divided light guide 32S (the end opposite to the slit 42) in the same manner as the slit 42.
- the formation range of the slits 42 does not extend to the board mounting part 30, and both split light guide parts 32 ⁇ / b> S are connected to the common board mounting part 30, so that mechanical stability is ensured.
- the light guide plate 18 is optically independent from each other, and two unit light guide plates (a divided light guide portion 32S and a divided light output portion 31S) individually corresponding to each LED 16 are provided by the substrate mounting portion 30. By being connected integrally, the workability of attaching the light guide plate 18 to the LED substrate 17 is ensured.
- the reflective sheet 24 is extended in the form which straddles the slit 42 (FIG. 13).
- the clip 23 includes an attachment plate 23 a parallel to the substrate attachment portion 30, an insertion protrusion 23 b protruding from the attachment plate 23 a in the plate thickness direction (Z-axis direction) of the substrate attachment portion 30, and an insertion It is comprised from a pair of latching piece 23c which protrudes from the front-end
- the clip 23 is guided by the insertion protrusion 23b being inserted into the clip insertion hole 43 of the board mounting part 30 and the mounting hole 17a of the LED board 17 and the locking piece 23c being locked to the edge of the mounting hole 17a.
- the light plate 18 can be fixed to the LED substrate 17 in an attached state.
- the clip 23 is provided with one insertion protrusion 23b on the attachment plate 23a and two insertion protrusions 23b on the attachment plate 23a.
- the former is used for the clip insertion hole 43 arranged at the end in the chassis 14, while the latter is used in a form straddling the two light guide plates 18 arranged in parallel, and the two light guide plates 18. Can be installed together. As shown in FIGS.
- a housing recess 44 for receiving the mounting plate 23 a of the clip 23 is provided on the periphery of the clip insertion hole 43, so that the mounting plate 23 a protrudes from the board mounting portion 30 to the front side. This contributes to space saving, that is, to reducing the thickness of the backlight device 12.
- a photosensor housing hole 45 capable of housing the photosensor 22 mounted on the LED substrate 17 is formed between the LED housing holes 33 in the board mounting portion 30 so as to penetrate therethrough. Since a predetermined number of the photosensors 22 are intermittently arranged on the LED substrate 17 and are arranged only between specific LEDs, the photosensors 22 are arranged in the photosensor housing holes 45 of all the light guide plates 18 in the chassis 14. 22 is not arranged.
- a pair of notches 46 are symmetrically arranged between the photosensor housing hole 45 and the LED housing holes 33 in the board mounting portion 30. This notch 46 is configured to open rearward while penetrating the board mounting portion 30, and a screw (not shown) for fixing the LED board 17 to the chassis 14 is passed therethrough. ing. Note that the notches 46 are not used in all the light guide plates 18 in the chassis 14 like the photosensor housing holes 45.
- the light guide plate 18 is planarly arranged in a grid pattern in the bottom plate 14a of the chassis 14, and the arrangement form will be described in detail.
- the arrangement form in the tandem arrangement direction (Y-axis direction) will be described.
- the light guide plate 18 is attached in a state in which the light guide portion 32 and the light output portion 31 are lifted from the LED substrate 17.
- the light guide plate 18 adjacent to the light guide plate 18 adjacent to the upper side in the vertical direction is disposed so as to cover almost the entire area of the light guide plate 32 from the front side.
- the substrate mounting portion 30 and the light guide portion 32 in the front light guide plate 18 and the rear light guide portion 32 and the light output portion 31 overlap each other when viewed in a plan view. It is a positional relationship. That is, the substrate mounting portion 30 and the light guide portion 32 which are non-light emitting portions of the light guide plate 18 are covered with the light guide portion 32 and the light output portion 31 of the light guide plate 18 adjacent to the rear side thereof, so that the diffusion plate 15b side.
- the light exit surface 36 of the light output portion 31 that is a light emitting portion is exposed to the diffuser plate 15b side. Thereby, the light emission surfaces 36 of the respective light guide plates 18 are continuously arranged almost seamlessly in the tandem arrangement direction.
- the reflection sheet 24 is disposed on almost the entire surface of the back side of the light guide unit 32 and the light output unit 31, even if light leaks due to being reflected by the light incident surface 34, The leakage light is prevented from entering the rear light guide plate 18.
- the light guide part 32 and the light output part 31 in the light guide plate 18 on the rear side (front side) are mechanically supported from the back side by the light guide plate 18 overlapping the front side (back side).
- the front-side inclined surface 40 and the back-side inclined surface 39 of the light guide plate 18 have substantially the same inclination angle and are parallel to each other, there is almost no gap between the light guide plates 18 that overlap the front and back surfaces. Therefore, the front light guide plate 18 can be supported by the back light guide plate 18 without rattling.
- the light guide part 32 in the rear light guide plate 18 only covers the substrate attachment part 30 in the front light guide plate 18, and the rear part faces the LED substrate 17.
- the light guide plates 18 are not overlapped with each other in a predetermined direction with respect to a direction orthogonal to the tandem arrangement direction (X-axis direction). They are arranged in parallel with a gap (clearance, clearance). By providing this gap, a certain air layer AR can be secured between the light guide plates 18 adjacent in the X-axis direction, and light is transmitted between the light guide portions 32 of the light guide plates 18 adjacent in the X-axis direction. Crossing and mixing are prevented, so that optical independence in each light guide portion 32 is ensured.
- the interval between the light guide plates 18 is equal to or smaller than the slit 42.
- the space between the light guide plates 18 is sufficiently large to ensure the air layer AR in consideration of assembly errors when the light guide plates 18 are assembled to the LED substrate 17 and the expansion amount due to thermal expansion. Is set to
- a large number of light guide plates 18 are arranged in a plane in the chassis 14, and the light output surface of the entire backlight device 12 is configured by a set of the divided light output surfaces 36 ⁇ / b> S.
- the light guide plates 18 have a certain degree of optical independence from each other. Therefore, by individually controlling the lighting or non-lighting of each LED 16, it is possible to independently control whether or not light is emitted from each divided light emitting unit 31S, and thus driving the backlight device 12 called area active. Control can be realized. As a result, the contrast performance that is extremely important as the display performance in the liquid crystal display device 10 can be remarkably improved.
- a predetermined gap C1 (interval, gap, clearance) is provided, but the amount of light is relatively insufficient in the area of the gap C1 compared to the light emitting surface 36. It has become a win.
- a gap C2 corresponding to the slit 42 is provided between the divided light guide parts 32S and the divided light output parts 31S adjacent in the X-axis direction in order to secure the air layer AR. Even in this area, the amount of light is still insufficient and it is a winner.
- a scattering structure described below is provided on a predetermined boundary surface with the air layer AR in the light guide plate 18 to promote partial light emission.
- the scattering structure is provided only in the light output part 31 (part having the light output surface 36) of the light guide plate 18, and is provided in the substrate mounting part 30 and the light guide part 32 (part not having the light output surface 36). Is not provided. Specifically, the scattering structure is provided on each of the light emitting portions 31 on both outer side end surfaces 31a facing each other across the air layer AR of the gap C1 with the light emitting portion 31 of the light guide plate 18 adjacent in the X-axis direction. In addition (FIG. 14), the light exiting portion 31 (both split light exiting portions 31S) is also provided on both inner side end surfaces 31b facing each other across the air layer AR present in the slit 42 (gap C2) (FIG. 14). 15).
- Each of these four side end faces 31a and 31b is a boundary surface with the air layer AR.
- the scattering structure provided in each side end surface 31a, 31b is demonstrated in detail, since the scattering structure in each side end surface 31a, 31b is substantially the same, it omits individual description.
- the scattering structure is constituted by a rough surface 47 formed by performing a blasting process on the side end surfaces 31 a and 31 b of the light output part 31.
- the side end surfaces 31a and 31b of the light emitting portion 31 are molded as substantially smooth surfaces by the molding die.
- a rough surface 47 having a scattering structure is formed by grinding the surface by subjecting the surface to blasting.
- the rough surface 47 is constituted by a large number of microscopic recesses 48, and the recesses 48 are recessed from the substantially smooth surface after resin molding described above as a reference surface BS.
- “microscopic” means that it is difficult to recognize a specific shape only by looking at the outer shape, and that the specific shape can be finally recognized using a magnifying glass or a microscope.
- the recesses 48 are irregularly (randomly) arranged in the respective side end faces 31 a and 31 b and their shapes.
- the term “irregular” as used herein indicates that there is no structural periodicity. In other words, a large number of the recesses 48 in each of the side end faces 31a and 31b in the Y-axis direction (the alignment direction of the LED 16 and the light incident surface 34) and the Z-axis direction (the direction perpendicular to the light emitting surface 36) It is distributed without having.
- the shape of the recess 48 has a substantially triangular cross section, but the dimensions, vertex angles, etc.
- each side end face 31a, 31b of the light exit part 31 is macroscopically almost confronted even though a large number of concave parts 48 having irregular shapes and arrangements are provided. That is, when the outer shapes of the side end surfaces 31a and 31b of the light exit portion 31 are viewed, the presence of the rough surface 47 can be recognized, but it is difficult to grasp the specific shape of each concave portion 48. 31a and 31b are recognized as being almost confronted (FIGS. 12, 14 and 15).
- the following effects are obtained by providing the rough surfaces 47 formed of a large number of concave portions 48 with irregular shapes and arrangements on the side end surfaces 31a and 31b of the light emitting portion 31 as described above. That is, when the light propagating in the light guide plate 18 reaches the light output part 31, scattering occurs by hitting the boundary surface with the air layer AR in each concave part 48 having an irregular shape and arrangement. At this time, light whose incident angle with respect to the boundary surface with the air layer AR in the concave portion 48 does not exceed the critical angle is generated, and the light is emitted to the outside of the light emitting portion 31. Note that the light exceeding the critical angle is totally reflected at the boundary surface and returned to the light output part 31.
- the rough surface 47 described above is predetermined from the front end position (end on the side far from the LED 16) on each side end face 31 a, 31 b of the light output part 31 in the front-rear direction (Y-axis direction). It is formed over the region A1, and the formation region A1 of the rough surface 47 is narrower than the formation region A2 of the light output portion 31. Specifically, the formation area A1 of the rough surface 47 has a front end position that coincides with the formation area A2 of the light emission part 31, but the rear end position (the end part on the side close to the LED 16) is more than the formation area A2 of the light emission part 31. Is also set forward.
- the rough surface 47 described above is formed so that the distribution density of the concave portions 48 on the side end surfaces 31a and 31b of the light emitting portion 31 changes in the front-rear direction (Y-axis direction). That is, the distribution density of the recesses 48 is set so as to gradually and gradually increase toward the front end side, that is, in the direction away from the LED 16, at each side end face 31 a, 31 b of the light exit part 31. Specifically, the concave portion 48 tends to have a smaller individual size on the side end surfaces 31a and 31b of the light emitting portion 31 and a smaller number of installations per unit area toward the rear end side (as it approaches the LED 16). On the other hand (FIG.
- the front end side (with distance from the LED 16) tends to have a smaller individual size and a larger number of installations per unit area (FIG. 17).
- the rear end side where the distribution density of the recesses 48 is relatively low has a relatively small amount of light emitted to the outside, whereas the distribution density of the recesses 48 is relatively low.
- the amount of light emitted to the outside is relatively large at the higher front end side.
- the amount of light in the light guide plate 18 tends to be relatively larger on the rear end side closer to the LED 16 and relatively smaller on the front end side farther from the LED 16.
- the amount of light emitted from the side end surfaces 31a and 31b of the light exit portion 31 can be made uniform without being biased in the front-rear direction (Y-axis direction).
- the light guide plate 18 having the structure as described above is manufactured as follows. That is, a molten mold resin resin material is filled in a molding die for resin-molding the light guide plate 18, and the mold is opened when it is cooled and solidified, whereby the light guide plate 18 having a predetermined shape is obtained.
- the side end surfaces 31a and 31b in the light output part 31 are formed as substantially smooth surfaces.
- the surface of each side end face 31a, 31b is ground by blasting the side end faces 31a, 31b of the light output part 31, that is, a blast grinding material made of finer particles harder than the light guide plate 18 by collision with compressed air. Perform the process.
- a rough surface 47 made up of a large number of microscopic concave portions 48 is formed on the side end surfaces 31 a and 31 b of the light exit portion 31.
- the light guide plate 18 manufactured as described above is assembled to the LED substrate 17 in a state where each LED 16 is surface-mounted in the manufacturing process of the backlight device 12. Specifically, after each LED substrate 17 is attached to a predetermined position with respect to the bottom plate 14a of the chassis 14 (FIG. 3), the light guide plate 18 is attached to a position corresponding to each LED 16 on each LED substrate 17. At this time, since the light guide plate 18 has a pair of LED housing holes 33 (light incident surfaces 34), the LED substrate is positioned while aligning each LED housing hole 33 with respect to a pair of LEDs 16 adjacent in the X-axis direction. 17 with a clip 23 attached.
- both side end surfaces (including both side end surfaces 31a outside the light-emitting portion 31) on the outer side in the X-axis direction of the light guide plate 18 are macroscopically confronted as viewed in a plane, as shown in FIG.
- the assembly error is relatively small compared to the case of macroscopically uneven shape (zigzag shape, jagged shape, meandering shape), and as a result, between the adjacent light guide plates 18 in the X-axis direction.
- the gap C1 (air layer AR) to be secured can be designed as small (thin) as possible. Since the gap C1 is a part that can cause a dark part as described above, the smaller the gap C1, the better the prevention of the dark part.
- the gap C1 can be minimized, and the occurrence of dark portions and luminance unevenness can be suitably suppressed. Further, by making the both side end surfaces of the light guide plate 18 macroscopically facing each other, the light guide plates 18 arranged in parallel in the X-axis direction are assembled in the Y-axis direction at the time of assembly as compared with the case of macroscopic unevenness. Since the gap C1 can be kept constant without strict alignment, the assembling workability is excellent.
- the light guide plate 18 is first attached to a position corresponding to the LED 16 at the upper end position (front end position) in the vertical direction (tandem arrangement direction) on the bottom plate 14a of the chassis 14, and then attached to the LED 16 on the lower side (rear side) in the vertical direction. They are attached sequentially (FIGS. 7 to 9).
- the light guide plate 18 attached after the second is partially overlapped with the light guide plate 18 adjacent on the upper side (front side) in the vertical direction from the front side. Accordingly, the light guide plates 18 are arranged in tandem along the vertical direction in a state where the light guide plates 18 are stacked on each other.
- the assembly of the backlight device 12 and the liquid crystal display device 10 is completed by incorporating other members.
- the power of the liquid crystal display device 10 is turned on and each LED 16 is turned on, the light emitted from the light emitting surface 16 a of each LED 16 enters the light incident surface 34. Since the light taken into the light guide plate 18 from the light incident surface 34 is propagated to the light output portion 31 side while being totally reflected in the light guide portion 32 at the boundary surface with the external air layer AR, on the way It prevents light from leaking outside and becoming leaked light.
- the R, G, B monochromatic lights from the LED chips 16c of the LEDs 16 are mixed with each other to become white light, and the X axis direction and the Y axis direction are sufficient. Diffused.
- the light that has reached the light exit portion 31 is scattered by the scattering surface 37 formed on the surface opposite to the light exit surface 36 and further reflected by the reflection sheet 24 disposed on the back side thereof. It rises to the exit surface 36 side.
- the light launched by the reflection sheet 24 while being scattered by the scattering surface 37 includes light whose incident angle with respect to the light exit surface 36 does not exceed the critical angle, and the light is guided from the light exit surface 36. The light is emitted out of the optical plate 18.
- each light guide plate 18 is uniformly dispersed in the surface of the light emitting surface 36 of the entire backlight device 12 in the process of passing through each diffusion plate 15a, 15b and each optical sheet 15c. Is irradiated to the liquid crystal panel 11 in the form of light.
- the light introduced from the LED 16 into the light guide plate 18 is not emitted outside only from the light exit surface 36 in the light exit portion 31, but also from each side end face 31a, 31b to the outside by the scattering structure described above.
- the light is emitted.
- the light that has propagated through the light guide portion 32 and has reached the light exit portion 31 is less likely to travel toward the side end surfaces 31 a and 31 b besides the light toward the scattering surface 37 that faces the light exit surface 36.
- the light directed toward the side end surfaces 31 a and 31 b hits a boundary surface with the air layer AR in each concave portion 48 of the rough surface 47 formed there.
- the scattered light includes light whose incident angle with respect to the boundary surface with the air layer AR in the recess 48 does not exceed the critical angle, and the light is emitted to the outside from the side end surfaces 31a and 31b.
- each concave portion 48 is irregular in shape and arrangement, light emitted from the boundary surface with the air layer AR in the concave portion 48 has almost no directivity and diffuses broadly. Accordingly, the light emitted from the side end surfaces 31a and 31b of the light exit part 31 is uniform throughout the gap C1 between the light guide plates 18 adjacent in the X axis direction and the gap C2 between the divided light output parts 31S adjacent in the X axis direction. To spread.
- each concave portion 48 is formed so that the distribution density on the side end surfaces 31a and 31b of the light exit portion 31 is gradually increased toward the front end side (FIGS. 14 and 15).
- the rear end side side closer to the LED 16 with a large amount of light within the light source 31
- light output from the side end surfaces 31a and 31b is suppressed (FIG. 16)
- the front end side LED 16 with a small amount of light originally in the light emitting unit 31.
- Light emission from the side end faces 31a and 31b is promoted on the far side) (FIG. 17).
- region of each said clearance gap C1, C2 can be equalized regarding the front-back direction (Y-axis direction).
- each gap C1, C2 since uniform emitted light can be supplied to the entire area of each gap C1, C2, the luminance distribution in the area of each gap C1, C2 can be made uniform. Thereby, it can prevent that the area
- the light guide plate 18 is arranged in parallel in the Y-axis direction (vertical direction) in the chassis 14, and its light output portion 31 is superimposed in plan view on the light guide portion 32 of the light guide plate 18 adjacent to the front side.
- the rough surface 47 which is a scattering structure is provided with respect to each light emission part 31 continuously arranged in parallel in the Y-axis direction, the light emitted from the side end surfaces 31a and 31b by the rough surface 47 is In the Y-axis direction, the backlight device 12 is supplied to the gaps C1 and C2 almost without any break over the entire length of the backlight device 12. Thereby, generation
- the rough surface 47 is provided only in each light output portion 31, and each light guide portion 32 that is superimposed in plan view on each light output portion 31 is not provided with the rough surface 47.
- the light guide unit 32 is provided with a rough surface to emit light, the amount of light supplied to the light output unit 31 is reduced by the amount of light emitted there, and the amount of light emitted from the light output surface 36 is also reduced. Bring results.
- the rough surface 47 only on the light exiting portion 31, the light emitted from the side end surfaces 31a and 31b of the light guide plate 18 can be kept to the minimum necessary to prevent the occurrence of dark portions.
- the backlight device 12 includes the LED 16, the light incident surface 34 that is arranged to face the LED 16 and receives light from the LED 16, and the LED 16 and the light incident surface 34.
- the light in the light guide plate 18 is formed between the air layer AR interposed between the light guide plates 18 and having a lower refractive index than that of the light guide plate 18 and the side end surface 31a that is a boundary surface between the light layer 18 and the air layer AR.
- a scattering structure for scattering the light is formed between the air layer AR interposed between the light guide plates 18 and having a lower refractive index than that of the light guide plate 18 and the side end surface 31a that is a boundary surface between the light layer 18 and the air layer AR.
- the light emitted from the LED 16 When the light emitted from the LED 16 is incident on the light incident surface 34 of the light guide plate 18, the light propagates through the light guide plate 18 and is emitted from the light exit surface 36 to the outside.
- the light propagating in the light guide plate 18 hits the side end surface 31a that is a boundary surface with the air layer AR in the light guide plate 18, the light is scattered by the scattering structure formed there.
- the scattered light includes light that does not exceed the critical angle with respect to the side end face 31 a, and the light is emitted to the outside of the light guide plate 18.
- the backlight device 12 is provided with a plurality of LEDs 16, and the light guide plate 18 is provided with a plurality of light incident surfaces 34 corresponding to the plurality of LEDs 16, and a light emitting surface 36. Is formed corresponding to a plurality of light incident surfaces 34, and an air layer AR is present in the slit 42. Of the light guide plate 18, a boundary surface with the air layer AR present in the slit 42.
- the side end face 31b is provided with a scattering structure.
- the light emitted from each LED 16 enters the individual light incident surface 34 and then exits from the individual light exit surfaces 36 divided by the slits 42.
- the light in the light guide plate 18 is emitted to the slit 42 side by the scattering structure from the side end surface 31b which is a boundary surface with the air layer AR present in the slit 42 in the light guide plate 18. It can suppress that a dark part arises. Further, since the light guide plate 18 corresponds to the plurality of LEDs 16, it is excellent in workability when the light guide plates 18 are arranged in parallel, and is particularly suitable for the large-sized backlight device 12.
- the scattering structure is constituted by a large number of microscopic concave portions 48.
- the light in the light guide plate 18 can be favorably scattered by the large number of microscopic concave portions 48.
- microscopic means that it is difficult to recognize a specific shape only by looking at the outer shape, and that the specific shape can be finally recognized using a magnifying glass or a microscope.
- the scattering structure has an irregular shape or arrangement in the recess 48. In this way, the directivity of the light emitted from the side end surfaces 31a and 31b can be reduced or eliminated. Thereby, it is possible to make it difficult for luminance unevenness to occur in a region between adjacent light guide plates 18.
- the recessed part 48 is formed by performing the blast process to the side end surfaces 31a and 31b.
- blasting refers to a process of grinding a surface to be processed by colliding with a blasting material made of fine particles harder than the surface to be processed with compressed air or the like.
- the concave portion 48 is formed so that the distribution density on the side end surfaces 31a and 31b is continuously and gradually increased in the direction away from the LED 16 with respect to the alignment direction of the LED 16 and the light incident surface 34.
- the amount of light in the light guide plate 18 is relatively greater on the side closer to the LED 16 than on the far side with respect to the alignment direction of the LED 16 and the light incident surface 34. Accordingly, with regard to the distribution density of the recesses 48 formed on the side end faces 31a and 31b, the side closer to the LED 16 having a large amount of light is relatively lowered to suppress light emission, while the side far from the LED 16 having a small amount of light is relatively increased.
- the amount of light emitted to the regions of the gap C1 between the adjacent light guide plates 18 and the gap C2 of the slit 42 can be made uniform in the arrangement direction. Thereby, it becomes more suitable for prevention of luminance unevenness.
- the side end faces 31a and 31b are assumed to be macroscopically confronted.
- the assembly error when arranging the plurality of light guide plates 18 in parallel is relatively small, so that the side end surfaces 31a,
- the air layer AR secured between 31b can be designed to be thin.
- dark portions are less likely to occur in the region between adjacent light guide plates 18.
- assembly work is facilitated, which contributes to a reduction in manufacturing costs.
- the term “macroscopic” as used herein refers to the extent that a specific shape can be easily recognized by looking at the outer shape.
- a plurality of light guide plates 18 are arranged in parallel in the arrangement direction of the LEDs 16 and the light incident surfaces 34. In this way, it is possible to make it difficult for luminance unevenness to occur in the entire backlight device 12 in which the light guide plate 18 and its light emitting surface 36 are two-dimensionally arranged in parallel.
- the light guide plate 18 is a light guide 31 having a light exit surface 36 and a light guide that is interposed between the light incident surface 34 and the light exit portion 31 and guides light incident from the light entrance surface 34 to the light guide 32.
- the light output part 31 is arranged so as to overlap in a plan view with respect to the light guide part 32 of the light guide plate 18 adjacent in the arrangement direction of the LED 16 and the light incident surface 34. In this way, since the light incident on the light incident surface 34 propagates through the light guide 32 and then exits from the light exit surface 36 of the light exit portion 31, the luminance distribution within the surface of the light exit surface 36. Can be made uniform.
- the light output part 31 is superimposed on the light guide part 32 that does not have the light output surface 36, and the light output surface 36 is arranged in parallel in the alignment direction of the LED 16 and the light incident surface 34, so that the brightness of the entire backlight device 12 is increased.
- the distribution can be made uniform.
- the scattering structure is formed in the light output part 31 except for the light guide part 32.
- the light guide unit 32 on which the light output unit 31 overlaps in plan view is not provided with a scattering structure, it is possible to prevent the amount of light emitted from the side end surfaces 31a and 31b from becoming excessive. Accordingly, it is possible to prevent luminance unevenness in the area of the gap C1 between the adjacent light guide plates 18 and the gap C2 of the slit 42 while ensuring a sufficient amount of light emitted from the light emitting surface 36.
- the low refractive index layer is an air layer AR. This eliminates the need for a special member for forming the air layer AR, and thus can be dealt with at a low cost.
- the light source is an LED 16. In this way, it is possible to increase the brightness.
- the scattering structure is composed of a large number of microscopic projections 49 formed by a molding die (not shown) used when resin-molding the light guide plate 18-A. Specifically, by forming a large number of microscopic recesses on the molding surface for each side end surface 31a-A, 31b-A of the light emitting part 31-A in the molding die, a large number of shapes following the recesses are formed.
- the microscopic convex portion 49 can be formed. And the convex part 49 is regularly arrange
- regular means having a structural periodicity.
- each convex portion 49 has a substantially triangular cross-section projecting from the reference surface BS-A at each side end surface 31a-A, 31b-A of the light emitting portion 31-A, and In the Z-axis direction, the columnar shape extends over the entire area of each side end face 31a-A, 31b-A.
- the pair of inclined surfaces 49a that are the outer surfaces of the convex portions 49 have a constant inclination angle with respect to the X-axis direction or the Y-axis direction over the entire Z-axis direction.
- each convex part 49 has a common structure of a columnar shape with a triangular cross section, and the side end faces 31a-A and 31b-A of the light output part 31-A have shapes that approximate each other in the Y-axis direction.
- a large number of convex portions 49 are continuously arranged.
- the light within the light emitting portion 31-A is emitted to the outside whose incident angle with respect to the boundary surface does not exceed the critical angle. It has become.
- the inclined surface 49a of the convex portion 49 which is the boundary surface with the air layer AR-A, has a regular shape as described above, by adjusting the inclination angle, etc. It is possible to easily control the amount of emitted light and its emitting direction.
- each convex part 49 is arranged so that the distribution density on each side end face 31a-A, 31b-A of the light emitting part 31-A becomes continuously higher toward the front end side, that is, in the direction away from the LED.
- the convex portions 49 are arranged so that the arrangement pitch (arrangement interval) gradually decreases from the rear end side to the front end side on each side end face 31a-A, 31b-A of the light output portion 31-A. .
- the protrusion 49 has a width dimension (dimension in the Y-axis direction) and a protrusion from the reference surface BS-A toward the rear end side of each side end face 31a-A, 31b-A of the light exit part 31-A. While the height dimension (dimension in the X-axis direction) tends to be large and the number of installations per unit area tends to decrease (FIG. 19), the individual width dimension and protrusion height dimension are smaller on the front end side and the unit The number of installations per area tends to increase (FIG. 20). The inclination angle of both inclined surfaces 49a of each convex portion 49 with respect to the Y-axis direction tends to be smaller (loosened) toward the rear end side (FIG.
- the rear end side where the distribution density of the convex portions 49 is relatively low has a relatively small amount of light emitted to the outside, whereas the distribution density of the convex portions 49 is relatively small.
- the front end side where is relatively high the amount of light emitted to the outside is relatively large.
- action and effect obtained by arranging the convex part 49 as mentioned above it is the same as that obtained by arrangement
- the formation range of the convex part 49 in the light emission part 31-A is the same as that of the concave part 48 in Embodiment 1 described above.
- each protrusion 49 at the front end of each side end face 31a-A, 31b-A of the light exit part 31-A is about 50 ⁇ m to 500 ⁇ m, and the protruding height dimension from the reference surface BS-A is 20 ⁇ m.
- the inclination angle of the inclined surface 49a is about 90 to 150 degrees.
- the width dimension of each convex portion 49 at the rear end portion of each side end surface 31a-A, 31b-A of the light emitting portion 31-A is about 50 ⁇ m to 500 ⁇ m, and the protruding height dimension from the reference surface BS-A is The inclination angle of the inclined surface 49a is about 90 to 150 degrees.
- the scattering structure is formed by regularly arranging the convex portions 49 in parallel. In this way, the amount of light emitted from the side end faces 31a-A and 31b-A can be easily controlled.
- the light guide plate 18-A is resin-molded using a molding die, and the convex portion 49 is molded by the molding die. In this way, it is not necessary to perform special processing for forming the regular convex portions 49, so that the cost can be reduced.
- a third embodiment of the present invention will be described with reference to FIG. 21 or FIG.
- the shape and arrangement of the convex portions 49-B are changed from those of the second embodiment.
- the same parts as those in the second embodiment are denoted by the same reference numerals and suffixed with the suffix -B, and redundant description of the structure, operation, and effects is omitted. .
- each convex portion 49-B formed on the side end surfaces 31a-B and 31b-B of the light emitting portion 31-B are all the same in shape, as shown in FIGS. Only the arrangement pitch in the front-rear direction on the side end faces 31a-B and 31b-B is changed. Specifically, each convex portion 49-B has the same width dimension, the protruding height from the reference surface BS-B, and the inclination angle of the inclined surface 49a-B with respect to the Y-axis direction. On the other hand, on the rear end side of the light exit portion 31-B, as shown in FIG.
- the arrangement pitch between the convex portions 49-B is relatively large, and the convex portions are formed on the side end surfaces 31a-B and 31b-B.
- the arrangement pitch between the portions 49-B is relatively small, and the side end surfaces 31a-B and 31b-B are arranged in parallel so that the convex portions 49-B are directly connected to each other without a flat surface.
- the distribution density of the convex portions 49-B on the side end surfaces 31a-B and 31b-B of the light emitting portion 31-B is continuously increased toward the front end side. It can be gradually increased.
- Embodiment 4 A fourth embodiment of the present invention will be described with reference to FIG. 23 or FIG. In this Embodiment 4, what changed the convex part of above-mentioned Embodiment 3 into the recessed part 50 is shown.
- the same parts as those in the third embodiment described above are denoted by the same reference numerals and suffixed with the suffix -C, and redundant description of the structure, operation, and effects is omitted. .
- each recess 50 has a substantially triangular cross section that is recessed from the reference surface BS-C at each side end face 31a-C, 31b-C of the light exit part 31-C, and each side end face 31a-C, 31b-C in the Z-axis direction. It is made into the groove shape extended over the whole region.
- the pair of inclined surfaces 50a which are the outer surfaces of the recesses 50, have a constant inclination angle with respect to the X-axis direction or the Y-axis direction over the entire Z-axis direction.
- positioning about the front-back direction of the recessed part 50 in each side end surface 31a-C, 31b-C of the light emission part 31-C is the same as that of above-mentioned Embodiment 3.
- Embodiment 5 A fifth embodiment of the present invention will be described with reference to FIG. 25 or FIG. In this Embodiment 5, what changed the shape of the convex part from above-mentioned Embodiment 2 is shown.
- the same parts as those in the first embodiment are denoted by the same reference numerals and suffixed with -D at the end thereof, and redundant description of the structure, operation, and effect is omitted. .
- the convex portion 51 has a substantially circular cross section projecting from the reference surface BS-D at each side end surface 31a-D, 31b-D of the light emitting portion 31-D, and in the Z-axis direction.
- the side end surfaces 31a-D and 31b-D have a columnar shape extending over the entire area.
- the outer surface of each convex portion 51 is an arcuate surface 51a.
- Each convex part 51 is arranged so that the distribution density on each side end face 31a-D, 31b-D of the light exit part 31-D becomes gradually higher toward the front end side.
- the convex portion 51 has individual width dimensions (dimensions in the Y-axis direction) and protrusions from the reference surface BS-D on the side end surfaces 31a-D and 31b-D of the light output portion 31-D. While the height dimension (dimension in the X-axis direction) tends to be large and the number of installations per unit area tends to be small (Fig. 25), the individual width dimension and protrusion height dimension are smaller on the front end side and the unit It is considered that the number of installations per area tends to increase (FIG. 26). In addition, the arc-shaped surface 51a in each convex part 51 has a tendency that the curvature increases toward the rear end side (FIG. 25) and decreases toward the front end side (FIG. 26).
- FIG. 27 A sixth embodiment of the present invention will be described with reference to FIG. 27 or FIG.
- a scattering structure is provided on the front end face of the light output part 31-E.
- the same parts as those in the first embodiment are denoted by the same reference numerals and suffixed with the suffix -E, and redundant description of the structure, operation, and effect is omitted. .
- a rough surface 52 made of a microscopic concave portion is provided. It can be said that the front end face 31c of the light exit part 31-E on which the rough surface 52 is formed is arranged to face the light exit part 31-E of the front light guide plate 18-E adjacent in the Y-axis direction ( FIG. 28).
- the rough surface 52 is formed by blasting the front end surface 31c of the light exit part 31-E.
- the distribution density in the front-end surface 31c of the light emission part 31-E is substantially uniform over the whole region.
- the detailed configuration and operation of the rough surface 52 other than those described above are the same as those in the first embodiment described above.
- the following effects can be obtained by forming the rough surface 52 on the front end face 31c of the light exit portion 31-E and letting light exit from the front end face 31c to the outside. That is, as described in the first embodiment, as shown in FIG. 28, a large number of light guide plates 18-E are arranged in parallel in the Y-axis direction (tandem arrangement direction), and each light output section 31-E ( Each light emitting surface 36-E) is continuously arranged in the Y-axis direction.
- a gap C3 may be formed between the formation regions A2-E of the light emitting portions 31-E adjacent in the Y-axis direction.
- the gap C3 When such a gap C3 occurs, there is a possibility that the area of the gap C3 is visually recognized as a dark part that is relatively dark compared to the light emitting surface 36-E or the like.
- a rough surface 52 is provided on the front end face 31c of the light exit part 31-E facing the gap C3 side, and light in the light exit part 31-E is emitted from the rough surface 52 toward the gap C3. Therefore, the shortage of light amount in the gap C3 can be compensated. Accordingly, it is possible to prevent the gap C3 that may be generated due to the assembly error of the light guide plate 18-E in the Y-axis direction from being visually recognized as a dark part and to prevent occurrence of luminance unevenness.
- the light guide plate 18-E has a scattering structure on the surface adjacent to both the light exit surface 36-E and the side end surfaces 31a-E and 31b-E.
- a rough surface 52 is provided.
- the LED 16- is formed by the rough surface 52 that is a scattering structure provided on the light guide plate 18 -E adjacent to both the light exit surface 36 -E and the side end surfaces 31 a -E and 31 b -E. Since light can be emitted to the region between the light guide plates 18-E arranged in parallel in the direction in which E and the light incident surface 34-E are arranged, it is possible to further prevent luminance unevenness.
- Embodiment 7 of the present invention will be described with reference to FIG. In this Embodiment 7, what changed the scattering structure from above-mentioned Embodiment 6 is shown.
- the same parts as those in the first embodiment are denoted by the same reference numerals and suffixed with the suffix -F, and redundant description of the structure, operation, and effects is omitted. .
- the front end face 31c-F of the light output part 31-F is provided with a number of microscopic convex parts 53 regularly arranged along the X-axis direction as a scattering structure.
- the convex portion 53 is formed by a molding die (not shown) used when resin-molding the light guide plate 18-F.
- the distribution density on the front end face 31c-F of the light emitting portion 31-F is substantially uniform over the entire area.
- a concave portion may be provided instead of the convex portion 53.
- FIG. 29 An eighth embodiment of the present invention will be described with reference to FIG. 29 or FIG.
- the shape of the side end faces 18a, 18b, 18c of the light guide plate 18-G is changed.
- the same parts as those in the seventh embodiment are denoted by the same reference numerals and suffixed with the suffix -G, and redundant description of the structure, operation, and effects is omitted. .
- the side end faces 18a, 18b, and 18c of the light guide plate 18-G have a macroscopic concavo-convex shape when viewed in plan, as shown in FIG. Specifically, out of the light guide plate 18-G, outer side end surfaces 18a and 18b facing the light guide plate 18-G adjacent in the X-axis direction, and inner side end surfaces 18c facing the slit 42-G and facing each other.
- Each has a plurality of convex portions 54 arranged in parallel in the Y-axis direction. The arrangement pitch of the convex portions 54 in the Y-axis direction is the same on the side end faces 18a, 18b, and 18c.
- the convex portions 54 on the side end surface 18a (the side end surface facing the first light guide plate) on the left side of the figure of the second light guide plate adjacent in the X-axis direction are shifted from each other in the Y-axis direction. It is supposed to be arranged. This relationship is the same also about each convex part 54 in the inner side end surface 18c facing the slit 42-G in the light guide plate 18-G.
- the side end surfaces 18a, 18b, 18c of the light guide plate 18-G have complementary shapes, and the gap C1-G between the light guide plates 18-G adjacent to each other in the X-axis direction and the slit 42.
- -G gap C2-G has a zigzag shape (meandering shape) along the Y-axis direction.
- the width dimensions of the gaps C1-G and C2-G are almost constant over the entire length. Accordingly, it is possible to make it difficult to visually recognize the existence of the gaps C1-G and C2-G, as compared with the case where the gaps are linear as in the first embodiment.
- a rough surface 47-G similar to that of the first embodiment is formed in the formation region A2-G of the light emitting portion 31-G among the side end surfaces 18a, 18b, 18c. Has been.
- the side end surfaces 18a, 18b, 18c of the light guide plate 18-G are macroscopic uneven shapes, and the side end surfaces 18a, 18b, 18b of the light guide plate 18-G facing each other.
- the shapes 18c are complementary to each other. This makes it possible to make the regions of the gaps C1-G and C2-G less visible as dark parts, coupled with the light emitted from the side end surfaces 18a, 18b, and 18c by the rough surface 47-G.
- each side end face 18b-H (including a side end face facing the slit) of the light guide plate 18-H on which a macroscopic uneven shape is formed is included.
- a convex portion 49-H similar to that of the second embodiment may be formed in the formation region A2-H of the light emitting portion 31-H.
- the distribution density of the recesses 48- on each side end face 31a-I (including the side end face facing the slit) of the light output part 31-I may be uniform over the entire area.
- the distribution density of the convex portions 49-J on each side end surface 31a-J (including the side end surface facing the slit) of the light output portion 31-J May be uniform over the entire area.
- blasting is shown as a rough surface forming method.
- Specific examples of blasting include, for example, abrasive blasting, bead blasting, glass bead blasting, cut wire blasting, grit blasting, and sand blasting. , Shot blasting, wet blasting, and the like, which can be appropriately selected and used.
- a rough surface forming method in addition to blasting, for example, a method of forming a rough surface by attaching fine particles such as silica to the surface to be processed, or by rubbing an abrasive on the surface to be processed It is also possible to use a method for forming the surface, a method for chemically treating the surface to be treated with a chemical agent, or the like.
- a method of using a molding die for resin-molding a light guide plate is shown as a regular method for forming convex portions or concave portions. Regular convex portions or concave portions may be formed by cutting or polishing the surface.
- a sheet material having an uneven shape separately from the light guide plate may be manufactured, and the sheet material may be attached to the light guide plate.
- the distribution density of the scattering structure (concave portion or convex portion) on the side end face of the light emitting portion can be changed as appropriate.
- the formation range of the scattering structure in the light guide plate can be appropriately changed.
- the scattering structure can be provided to extend not only to the light output portion but also to the side end surfaces of the light guide portion and the substrate mounting portion.
- an air layer is used as the low refractive index layer.
- a low refractive index layer made of a low refractive index material is interposed in each gap in the light guide plate. are also included in the present invention.
- one slit is provided in the light guide plate and two divided light output portions and two divided light guide portions (light incident surfaces) are provided.
- a slit is provided in the light guide plate.
- Two or more light emitting units and three or more divided light guiding units (light incident surfaces) are provided in the present invention. In this way, since three or more LEDs can be collectively covered by a single light guide plate, the assembling workability of the backlight device is excellent. Even in such a case, it is preferable that a pair of fixing positions of the light guide plate by a fixing member such as a clip is arranged at a position where the LEDs are sandwiched together.
- a slit is provided in the light guide plate to divide the light output portion and the light guide portion, so that a plurality of LEDs are collectively covered by one light guide plate.
- a light guide plate that does not have a slit and covers each LED individually (having only one light incident surface) is also included in the present invention. If it does in this way, it can prevent reliably that the light from adjacent LED which does not respond
- the light guide plate has a rectangular shape when viewed in a plane, but the light guide plate may have a square shape when viewed in a plane.
- each length dimension, each width dimension, each thickness dimension, and each outer surface shape in the substrate mounting portion, the light guide portion, and the light output portion can be appropriately changed.
- the light emission direction of the LED is directed upward in the vertical direction.
- the light emission direction of the LED that is, the installation direction of the LED on the LED substrate can be appropriately changed.
- the present invention includes those in which the LED is installed with respect to the LED substrate so that the light emission direction is downward in the vertical direction and those in which the light emission direction (optical axis) is aligned with the horizontal direction.
- what mixed LED from which a light emission direction is mixed is also contained in this invention.
- the light guide plates are arranged so as to overlap each other when viewed in a plane.
- the present invention includes an arrangement where the light guide plates are not overlapped when viewed in a plane.
- the scattering structure is preferably provided to extend not only to the light output part but also to the side end face of the light guide part or the board mounting part, and more preferably provided over the entire outer peripheral end face of the light guide plate. .
- the LED and the light guide plate are two-dimensionally arranged in parallel in the chassis.
- the one-dimensionally arranged parallel arrangement is also the present invention. include. Specifically, the LED and the light guide plate are arranged in parallel only in the vertical direction, and the LED and the light guide plate are arranged in parallel only in the horizontal direction are also included in the present invention.
- an LED using three types of LED chips each emitting R, G, and B in a single color is shown. However, one type of LED chip that emits blue or purple in a single color. In the present invention, an LED using a type of LED that emits white light with a phosphor is also included.
- the light source using an LED as the point light source is exemplified, but a light source using a point light source other than the LED is also included in the present invention.
- the light source using a point light source is exemplified, but a light source using a linear light source such as a cold cathode tube or a hot cathode tube is also included in the present invention.
- the configuration of the optical member can be appropriately changed. Specifically, the number of diffusion plates and the number and type of optical sheets can be changed as appropriate. It is also possible to use a plurality of optical sheets of the same type.
- the liquid crystal panel and the chassis are illustrated in a vertically placed state in which the short side direction coincides with the vertical direction.
- the liquid crystal panel and the chassis have the long side direction in the vertical direction.
- Those that are in a vertically placed state matched with are also included in the present invention.
- a TFT is used as a switching element of a liquid crystal display device.
- the present invention can also be applied to a liquid crystal display device using a switching element other than TFT (for example, a thin film diode (TFD)).
- a switching element other than TFT for example, a thin film diode (TFD)
- the present invention can also be applied to a liquid crystal display device for monochrome display.
- liquid crystal display device using the liquid crystal panel as the display element has been exemplified, but the present invention is also applicable to a display device using another type of display element.
- the television receiver provided with the tuner is exemplified, but the present invention is also applicable to a display device not provided with the tuner.
Abstract
Description
上記したバックライト装置では、反射層によって導光板内の光を伝播させる手法を採用しているが、それ以外にも、隣り合う導光板間に導光板よりも屈折率が低い空気層を介在させることで、導光板内の光を、導光板と空気層との境界面において全反射させて伝播させる手法を用いる場合がある。
本発明の照明装置は、光源と、前記光源と対向状に配されるとともに前記光源からの光が入射される光入射面、及び前記光源と前記光入射面との並び方向に並行するとともに光を出射させる光出射面を有していて、前記光出射面に並行し且つ前記並び方向と交差する方向に複数並列して配される導光体と、隣り合う前記導光体間に介在するとともに、前記導光体よりも屈折率が低い低屈折率層と、前記導光体のうち前記低屈折率層との境界面に形成され、前記導光体内の光を散乱させる散乱構造とを備える。
(1)前記散乱構造は、多数の微視的な凹部または凸部により構成されている。このようにすれば、多数の微視的な凹部または凸部によって導光体内の光を良好に散乱させることができる。なお、ここで言う「微視的」とは、外形を眺めるのみでは具体的な形状を認識するのが難しく、拡大鏡や顕微鏡を用いてようやく具体的な形状を認識できる程度を示す。
本発明によれば、輝度ムラを防ぐことができる。
11…液晶パネル(表示パネル)
12…バックライト装置(照明装置)
16…LED(光源、発光ダイオード)
18…導光板(導光体)
18a,18b,18c…側端面(境界面)
24…反射シート(反射部材)
31…出光部
31a,31b…側端面(境界面)
31c…前端面(光出射面及び境界面の双方に対して隣接する面)
32…導光部
34…光入射面
36…光出射面
42…スリット
47,52…粗面(散乱構造)
48,50…凹部(散乱構造)
49,51,53…凸部(散乱構造)
AR…空気層(低屈折率層)
TV…テレビ受信装置
本発明の実施形態1を図1~図15によって説明する。本実施形態では、液晶表示装置10について例示する。なお、各図面の一部にはX軸、Y軸及びZ軸を示しており、各軸方向が各図面で示した方向となるように描かれている。また、図4~図11に示す上側を表側とし、同図下側を裏側とする。
本発明の実施形態2を図18から図20によって説明する。この実施形態2では、散乱構造を変更したものを示す。なお、この実施形態2では、上記した実施形態1と同様の部位には、同一の符号を用いるとともにその末尾に添え字‐Aを付すものとし、構造、作用及び効果について重複する説明は省略する。
本発明の実施形態3を図21または図22によって説明する。この実施形態3では、上記した実施形態2から凸部49‐Bの形状及び配列を変更したものを示す。なお、この実施形態3では、上記した実施形態2と同様の部位には、同一の符号を用いるとともにその末尾に添え字‐Bを付すものとし、構造、作用及び効果について重複する説明は省略する。
本発明の実施形態4を図23または図24によって説明する。この実施形態4では、上記した実施形態3の凸部を凹部50に変更したものを示す。なお、この実施形態4では、上記した実施形態3と同様の部位には、同一の符号を用いるとともにその末尾に添え字‐Cを付すものとし、構造、作用及び効果について重複する説明は省略する。
本発明の実施形態5を図25または図26によって説明する。この実施形態5では、上記した実施形態2から凸部の形状を変更したものを示す。なお、この実施形態5では、上記した実施形態1と同様の部位には、同一の符号を用いるとともにその末尾に添え字‐Dを付すものとし、構造、作用及び効果について重複する説明は省略する。
本発明の実施形態6を図27または図28によって説明する。この実施形態6では、出光部31‐Eの前端面に散乱構造を設けるようにしたものを示す。なお、この実施形態6では、上記した実施形態1と同様の部位には、同一の符号を用いるとともにその末尾に添え字‐Eを付すものとし、構造、作用及び効果について重複する説明は省略する。
本発明の実施形態7を図29によって説明する。この実施形態7では、上記した実施形態6から散乱構造を変更したものを示す。なお、この実施形態7では、上記した実施形態1と同様の部位には、同一の符号を用いるとともにその末尾に添え字‐Fを付すものとし、構造、作用及び効果について重複する説明は省略する。
本発明の実施形態8を図29または図30によって説明する。この実施形態8では、導光板18‐Gの側端面18a,18b,18cの形状を変更したものを示す。なお、この実施形態8では、上記した実施形態7と同様の部位には、同一の符号を用いるとともにその末尾に添え字‐Gを付すものとし、構造、作用及び効果について重複する説明は省略する。
本発明は上記記述及び図面によって説明した実施形態に限定されるものではなく、例えば次のような実施形態も本発明の技術的範囲に含まれる。
Claims (19)
- 光源と、
前記光源と対向状に配されるとともに前記光源からの光が入射される光入射面、及び前記光源と前記光入射面との並び方向に並行するとともに光を出射させる光出射面を有していて、前記光出射面に並行し且つ前記並び方向と交差する方向に複数並列して配される導光体と、
隣り合う前記導光体間に介在するとともに、前記導光体よりも屈折率が低い低屈折率層と、
前記導光体のうち前記低屈折率層との境界面に形成され、前記導光体内の光を散乱させる散乱構造とを備える照明装置。 - 前記散乱構造は、多数の微視的な凹部または凸部により構成されている請求の範囲第1項記載の照明装置。
- 前記散乱構造は、前記凹部または前記凸部における形状または配置を不規則にしてなる請求の範囲第2項記載の照明装置。
- 前記凹部または前記凸部は、前記境界面にブラスト処理を施すことで形成されている請求の範囲第3項記載の照明装置。
- 前記散乱構造は、前記凹部または前記凸部を規則的に並列配置してなる請求の範囲第2項記載の照明装置。
- 前記導光体は、成形金型を用いて樹脂成形されており、前記凹部または前記凸部は、前記成形金型によって成形されている請求の範囲第5項記載の照明装置。
- 前記凹部または前記凸部は、前記境界面における分布密度が、前記光源と前記光入射面との並び方向に関して前記光源から遠ざかる方向へ向けて連続的に漸次高くなるよう形成されている請求の範囲第2項から請求の範囲第6項のいずれか1項に記載の照明装置。
- 前記境界面は、巨視的な真直面とされている請求の範囲第1項から請求の範囲第7項のいずれか1項に記載の照明装置。
- 前記光源が複数設けられるものであって、
前記導光体には、複数の前記光源に対応して前記光入射面が複数設けられるとともに、前記光出射面を複数の前記光入射面に対応して分割するスリットが形成され、そのスリットに前記低屈折率層が存在しており、
前記導光体のうち、前記スリットに存在する前記低屈折率層との境界面には、前記散乱構造が設けられている請求の範囲第1項から請求の範囲第8項のいずれか1項に記載の照明装置。 - 前記導光体は、前記光源と前記光入射面との並び方向について複数並列して配されている請求の範囲第1項から請求の範囲第9項のいずれか1項に記載の照明装置。
- 前記導光体のうち、前記光出射面及び前記境界面の双方に対して隣接する面には、前記散乱構造が設けられている請求の範囲第10項記載の照明装置。
- 前記導光体は、前記光出射面を有する出光部と、前記光入射面と前記出光部との間に介在し前記光入射面から入射した光を前記出光部へと導く導光部とを備えており、
前記出光部は、前記光源と前記光入射面との並び方向に隣り合う前記導光体の前記導光部に対して平面視重畳するよう配されている請求の範囲第10項または請求の範囲第11項記載の照明装置。 - 前記散乱構造は、前記導光部を除いて前記出光部に形成されている請求の範囲第12項照明装置。
- 前記導光体における前記境界面は、巨視的な凹凸形状とされ、互いに対向する前記導光体の前記境界面同士が相補的な形状とされる請求の範囲第1項から請求の範囲第13項のいずれか1項に記載の照明装置。
- 前記低屈折率層は、空気層とされる請求の範囲第1項から請求の範囲第14項のいずれか1項に記載の照明装置。
- 前記光源は、発光ダイオードとされる請求の範囲第1項から請求の範囲第15項のいずれか1項に記載の照明装置。
- 請求の範囲第1項から請求の範囲第16項のいずれか1項に記載の照明装置と、前記照明装置からの光を利用して表示を行う表示パネルとを備える表示装置。
- 前記表示パネルは、一対の基板間に液晶を封入してなる液晶パネルとされる請求の範囲第17項記載の表示装置。
- 請求の範囲第17項または請求の範囲第18項に記載された表示装置を備えるテレビ受信装置。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010531775A JP5039209B2 (ja) | 2008-09-30 | 2009-06-19 | 照明装置、表示装置、及びテレビ受信装置 |
CN2009801379154A CN102165247A (zh) | 2008-09-30 | 2009-06-19 | 照明装置、显示装置以及电视接收装置 |
US13/063,309 US8371738B2 (en) | 2008-09-30 | 2009-06-19 | Lighting device, display device and television receiver |
RU2011111702/07A RU2468284C1 (ru) | 2008-09-30 | 2009-06-19 | Осветительное устройство, устройство отображения и телевизионный приемник |
BRPI0920610A BRPI0920610A2 (pt) | 2008-09-30 | 2009-06-19 | dispositivo de iluminacao, dispositivo de monstruario e receptor de televisao |
EP09817557.3A EP2325545B1 (en) | 2008-09-30 | 2009-06-19 | Illuminating device, display device and television receiver |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008-255038 | 2008-09-30 | ||
JP2008255038 | 2008-09-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2010038519A1 true WO2010038519A1 (ja) | 2010-04-08 |
Family
ID=42073295
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2009/061191 WO2010038519A1 (ja) | 2008-09-30 | 2009-06-19 | 照明装置、表示装置、及びテレビ受信装置 |
Country Status (7)
Country | Link |
---|---|
US (1) | US8371738B2 (ja) |
EP (1) | EP2325545B1 (ja) |
JP (1) | JP5039209B2 (ja) |
CN (1) | CN102165247A (ja) |
BR (1) | BRPI0920610A2 (ja) |
RU (1) | RU2468284C1 (ja) |
WO (1) | WO2010038519A1 (ja) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102059980A (zh) * | 2010-11-17 | 2011-05-18 | 上海瑞尔实业有限公司 | 一种发光均匀的led发光门槛板 |
CN102221757A (zh) * | 2010-04-19 | 2011-10-19 | 日立民用电子株式会社 | 液晶显示装置 |
CN102486277A (zh) * | 2010-12-03 | 2012-06-06 | 日立民用电子株式会社 | 背光源单元和使用它的影像显示装置 |
WO2013105258A1 (ja) * | 2012-01-12 | 2013-07-18 | 日立コンシューマエレクトロニクス株式会社 | 映像表示装置、及び映像表示装置のバックライトユニット |
WO2014103389A1 (ja) * | 2012-12-27 | 2014-07-03 | 株式会社 東芝 | バックライトユニット及びそれを用いた映像表示装置 |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014086406A (ja) * | 2012-10-26 | 2014-05-12 | Funai Electric Co Ltd | 表示装置 |
KR102315159B1 (ko) * | 2014-05-15 | 2021-10-19 | 로히니, 엘엘씨. | 광-발생원들을 이용한 광 확산 |
AT515864B1 (de) * | 2014-06-11 | 2016-03-15 | Zizala Lichtsysteme Gmbh | Beleuchtungsvorrichtung für Fahrzeuge sowie Kraftfahrzeugscheinwerfer |
GB2568024A (en) * | 2017-09-25 | 2019-05-08 | Emotech Ltd | Display device |
CN109521600A (zh) * | 2018-10-23 | 2019-03-26 | 惠州市华星光电技术有限公司 | 一种背光模组及其显示装置 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001243822A (ja) * | 2000-02-28 | 2001-09-07 | Omron Corp | 面光源装置及びその製造方法 |
JP2006108045A (ja) | 2004-10-08 | 2006-04-20 | Sharp Corp | 照明装置 |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8903118D0 (en) | 1989-02-11 | 1989-03-30 | Smiths Industries Plc | Radiation emissive devices |
DE29706201U1 (de) | 1997-03-27 | 1997-05-28 | Osa Elektronik Gmbh | Leucht- oder Anzeigeelement mit einer Lichteinkopplung in einen Lichtleitkörper |
FI107085B (fi) | 1999-05-28 | 2001-05-31 | Ics Intelligent Control System | Valopaneeli |
US6592238B2 (en) | 2001-01-31 | 2003-07-15 | Light Technologies, Inc. | Illumination device for simulation of neon lighting |
JP4049624B2 (ja) * | 2001-07-27 | 2008-02-20 | 株式会社エンプラス | 面光源装置、画像表示装置及び導光板 |
JP3760900B2 (ja) * | 2001-09-06 | 2006-03-29 | セイコーエプソン株式会社 | 導光装置、電気光学装置及び電子機器 |
JP2005295256A (ja) * | 2004-03-31 | 2005-10-20 | Toshiba Corp | テレビジョン受像機 |
DE102004046256A1 (de) * | 2004-09-23 | 2006-04-06 | Osram Opto Semiconductors Gmbh | Oberflächenleuchtsystem |
JP2006108033A (ja) * | 2004-10-08 | 2006-04-20 | Mitsubishi Rayon Co Ltd | タンデム型面光源装置 |
TWI289226B (en) * | 2004-12-24 | 2007-11-01 | Innolux Display Corp | Diffuser and backlight module using the same |
US7311431B2 (en) * | 2005-04-01 | 2007-12-25 | Avago Technologies Ecbu Ip Pte Ltd | Light-emitting apparatus having a plurality of adjacent, overlapping light-guide plates |
TWI331694B (en) * | 2005-10-20 | 2010-10-11 | Ind Tech Res Inst | Back-lighted structure |
TWI321694B (en) * | 2005-12-23 | 2010-03-11 | Innolux Display Corp | Backlight module and liquid crystal display module |
KR20070081564A (ko) * | 2006-02-13 | 2007-08-17 | 삼성전자주식회사 | 백라이트 어셈블리 및 이를 구비한 표시 장치 |
CN101097054B (zh) * | 2006-06-30 | 2010-06-02 | 株式会社东芝 | 照明装置和液晶显示器 |
JP4735849B2 (ja) * | 2006-10-26 | 2011-07-27 | ミネベア株式会社 | 面状照明装置 |
US20080205078A1 (en) * | 2007-02-23 | 2008-08-28 | Luminus Devices, Inc. | Illumination tiles and related methods |
US7905617B2 (en) * | 2008-09-23 | 2011-03-15 | Samsung LED. Co., Ltd. | Backlight unit |
-
2009
- 2009-06-19 BR BRPI0920610A patent/BRPI0920610A2/pt not_active IP Right Cessation
- 2009-06-19 US US13/063,309 patent/US8371738B2/en not_active Expired - Fee Related
- 2009-06-19 JP JP2010531775A patent/JP5039209B2/ja not_active Expired - Fee Related
- 2009-06-19 EP EP09817557.3A patent/EP2325545B1/en not_active Not-in-force
- 2009-06-19 RU RU2011111702/07A patent/RU2468284C1/ru not_active IP Right Cessation
- 2009-06-19 CN CN2009801379154A patent/CN102165247A/zh active Pending
- 2009-06-19 WO PCT/JP2009/061191 patent/WO2010038519A1/ja active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001243822A (ja) * | 2000-02-28 | 2001-09-07 | Omron Corp | 面光源装置及びその製造方法 |
JP2006108045A (ja) | 2004-10-08 | 2006-04-20 | Sharp Corp | 照明装置 |
Non-Patent Citations (1)
Title |
---|
See also references of EP2325545A4 * |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102221757A (zh) * | 2010-04-19 | 2011-10-19 | 日立民用电子株式会社 | 液晶显示装置 |
CN102059980A (zh) * | 2010-11-17 | 2011-05-18 | 上海瑞尔实业有限公司 | 一种发光均匀的led发光门槛板 |
CN102486277A (zh) * | 2010-12-03 | 2012-06-06 | 日立民用电子株式会社 | 背光源单元和使用它的影像显示装置 |
EP2461091A3 (en) * | 2010-12-03 | 2012-08-29 | Hitachi Consumer Electronics Co., Ltd. | Backlight unit and image display using the same |
US8740441B2 (en) | 2010-12-03 | 2014-06-03 | Hitachi Consumer Electronics Co., Ltd. | Backlight unit and image display using the same |
WO2013105258A1 (ja) * | 2012-01-12 | 2013-07-18 | 日立コンシューマエレクトロニクス株式会社 | 映像表示装置、及び映像表示装置のバックライトユニット |
WO2014103389A1 (ja) * | 2012-12-27 | 2014-07-03 | 株式会社 東芝 | バックライトユニット及びそれを用いた映像表示装置 |
Also Published As
Publication number | Publication date |
---|---|
JP5039209B2 (ja) | 2012-10-03 |
US8371738B2 (en) | 2013-02-12 |
BRPI0920610A2 (pt) | 2019-09-24 |
EP2325545B1 (en) | 2014-07-16 |
EP2325545A4 (en) | 2013-05-15 |
RU2468284C1 (ru) | 2012-11-27 |
RU2011111702A (ru) | 2012-11-10 |
EP2325545A1 (en) | 2011-05-25 |
US20110164190A1 (en) | 2011-07-07 |
JPWO2010038519A1 (ja) | 2012-03-01 |
CN102165247A (zh) | 2011-08-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5039209B2 (ja) | 照明装置、表示装置、及びテレビ受信装置 | |
WO2010058625A1 (ja) | 照明装置、表示装置、及びテレビ受信装置 | |
KR101333439B1 (ko) | 도광체, 면 광원 장치 및 액정 표시 장치 | |
US20100060818A1 (en) | Illumination device and liquid crystal display device | |
US20110164404A1 (en) | Illumination device, surface light source device, and liquid crystal display apparatus | |
WO2010064473A1 (ja) | 照明装置、表示装置、及びテレビ受信装置 | |
JP5073828B2 (ja) | 照明装置、表示装置、及びテレビ受信装置 | |
JP5073831B2 (ja) | 照明装置、表示装置、及びテレビ受信装置 | |
RU2487294C2 (ru) | Плоский источник света и жидкокристаллический дисплей | |
JP5073834B2 (ja) | 照明装置、表示装置、及びテレビ受信装置 | |
JP5108953B2 (ja) | 照明装置、表示装置、及びテレビ受信装置 | |
WO2011111444A1 (ja) | 照明装置、表示装置、及びテレビ受信装置 | |
WO2010038522A1 (ja) | 照明装置、表示装置、及びテレビ受信装置 | |
WO2011108165A1 (ja) | エッジライト式面状光源装置、及び液晶表示装置 | |
JP5044700B2 (ja) | 照明装置、表示装置、及びテレビ受信装置 | |
WO2010044296A1 (ja) | 照明装置、表示装置、及びテレビ受信装置 | |
WO2010041499A1 (ja) | 照明装置、表示装置、及びテレビ受信装置 | |
WO2012026164A1 (ja) | 照明装置および表示装置 | |
WO2010061676A1 (ja) | 照明装置、表示装置、及びテレビ受信装置 | |
US10718973B2 (en) | Display device | |
WO2010050274A1 (ja) | 照明装置、表示装置、及びテレビ受信装置 | |
WO2010038521A1 (ja) | 照明装置、表示装置、及びテレビ受信装置 | |
WO2010109731A1 (ja) | 照明装置、表示装置、及びテレビ受信装置 | |
WO2011074410A1 (ja) | 照明装置、表示装置、及びテレビ受信装置 | |
WO2010044297A1 (ja) | 照明装置、表示装置、及びテレビ受信装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 200980137915.4 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 09817557 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2010531775 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2009817557 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 13063309 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2110/CHENP/2011 Country of ref document: IN |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2011111702 Country of ref document: RU |
|
ENP | Entry into the national phase |
Ref document number: PI0920610 Country of ref document: BR Kind code of ref document: A2 Effective date: 20110329 |