WO2010089929A1 - 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
- WO2010089929A1 WO2010089929A1 PCT/JP2009/069469 JP2009069469W WO2010089929A1 WO 2010089929 A1 WO2010089929 A1 WO 2010089929A1 JP 2009069469 W JP2009069469 W JP 2009069469W WO 2010089929 A1 WO2010089929 A1 WO 2010089929A1
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- WIPO (PCT)
- Prior art keywords
- optical member
- light source
- support
- light
- condensing
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V19/00—Fastening of light sources or lamp holders
- F21V19/0075—Fastening of light sources or lamp holders of tubular light sources, e.g. ring-shaped fluorescent light sources
- F21V19/008—Fastening of light sources or lamp holders of tubular light sources, e.g. ring-shaped fluorescent light sources of straight tubular light sources, e.g. straight fluorescent tubes, soffit lamps
- F21V19/009—Fastening of light sources or lamp holders of tubular light sources, e.g. ring-shaped fluorescent light sources of straight tubular light sources, e.g. straight fluorescent tubes, soffit lamps the support means engaging the vessel of the source
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- 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
-
- 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
- G02F1/133604—Direct backlight with lamps
-
- 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
- G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
- G02F2201/54—Arrangements for reducing warping-twist
Definitions
- the present invention relates to a lighting device, a display device, and a television receiver.
- the liquid crystal display device is composed of a liquid crystal panel and a backlight device installed on the back side of the liquid crystal panel.
- the backlight device has a light source such as a cold-cathode tube and a chassis in which a surface on the light emission side is opened, and a light that is installed in the opening portion of the chassis and emits light emitted from the light source in a uniform surface shape.
- an optical member having a function such as
- the optical member includes a diffusing plate having a structure in which a large number of diffusing particles are dispersed and contained in a transparent base material having a predetermined thickness, and its outer peripheral end is received by a receiving portion on the chassis side. Is supported. On the other hand, the inner part of the diffuser plate from the outer peripheral end is supported by a support member attached to the chassis.
- Patent Document 1 As an example of this type of support member, one described in Patent Document 1 below is known. This has a support pin that protrudes toward the diffusion plate, and the diffusion plate is supported by the tip of the support pin abutting on the inner side of the outer peripheral end of the diffusion plate. The A plurality of support members and support pins are arranged in a dispersed manner in the plane of the diffusion plate. JP 2007-33962 A
- positioned in the surface of a diffusion plate is made to differ from the following reason. That is, as the cold cathode tube is turned on or off, if the temperature environment in the backlight device changes, the diffusion plate will thermally expand or contract accordingly. At the time of thermal expansion, the diffusion plate may be locally deformed with the support position of each support pin as a starting point to cause local deformation and uneven brightness. Therefore, in Patent Document 1, the support pin on the center side is lowered. By increasing the support pins on the end side, the diffuser plate is warped in a bow shape as a whole, thereby making it difficult for local deformation to occur in the diffuser plate.
- the present invention has been completed on the basis of the above-described circumstances, and an object thereof is to prevent luminance unevenness and reduce the thickness.
- the illumination device includes a chassis that opens to the light exit side, a plurality of light sources that are housed in the chassis and arranged in parallel, and that is disposed closer to the light exit side than the light source to cover the opening of the chassis An optical member; and a support member that can support the optical member from a side opposite to the light emitting side, and is arranged in parallel along at least a parallel direction of the light source, and the support member includes the optical member
- the support position with respect to the member is relatively close to the light source on the center side and relatively far from the light source on the end side, whereas the light source is relatively arranged on the center side. Narrow and relatively wide at the end.
- the support position of the support member relative to the optical member is relatively close to the light source on the center side and relatively far from the light source on the end side, so that the optical member is thermally expanded due to a change in the thermal environment.
- the optical member as a whole can be largely bent convexly toward the light source. Therefore, stress acting at each support position can be relaxed in a state where the optical member is supported by the support member. Thereby, it can suppress that an optical member deform
- the arrangement pitch of the light sources is set to be relatively narrow on the center side, and the distribution density of the light sources on the center side is increased, so that the distance between the optical member and the light source is reduced on the center side.
- the support position of the support member with respect to the optical member can be as close to the light source as possible, so that the overall thickness can be reduced.
- the following configuration is preferable as an embodiment of the present invention.
- the light sources are arranged such that the arrangement pitch gradually and gradually increases from the center side toward the end side. In this way, the distribution density of the light sources can be gently changed in the plane of the optical member, which is more suitable for preventing luminance unevenness.
- the support member is formed such that a support position with respect to the optical member is gradually and gradually moved away from the light source from the center side toward the end side. In this way, since the optical member can be supported in a gently curved shape during thermal expansion, local deformation is less likely to occur in the optical member, which is more suitable for preventing luminance unevenness.
- the support member is formed such that a line connecting support positions with respect to the optical member forms a substantially arcuate curve. In this way, the optical member can be supported in a more gently curved shape during thermal expansion.
- the support member is formed such that a support position for the optical member is disposed between the adjacent light sources. In this way, the light from the light source is not easily blocked by the support member, which is more suitable for preventing uneven brightness.
- the support member is formed so that a support position with respect to the optical member is arranged at the center between the adjacent light sources. In this way, since the distance between the support position of the support member relative to the optical member and the adjacent light source becomes substantially equal, it is more suitable for preventing luminance unevenness.
- the support members are arranged so that the arrangement pitch is relatively narrow on the center side and relatively wide on the end side. In this way, when the optical member is thermally expanded, a larger stress tends to act on the center side than on the end side, but since more support members are arranged on the center side, each support member has The acting stress can be relaxed. As a result, rubbing is less likely to occur between the optical member and the support member at the support position, and the generation of a squeaking noise can be suppressed.
- a plurality of the optical members are stacked. In this way, in the case where a plurality of optical members are laminated, if a local deformation occurs, there is a possibility that a great adverse optical effect may occur, which is useful.
- the optical member contains a diffusion material that diffuses light and can be directly supported by the support member; and an optical sheet that is laminated on the light output side with respect to the diffusion plate; Among these, the optical sheet includes at least a light condensing structure. In this way, an optical sheet having a condensing structure is particularly useful because luminance unevenness is likely to occur when local deformation occurs.
- the condensing structure has anisotropy in condensing. In this way, when the light collecting structure has anisotropy, it is more useful because local unevenness in the optical sheet is more likely to cause uneven brightness.
- the condensing structure includes a plurality of cylindrical lenses arranged in parallel. This makes it useful for a cylindrical lens having a condensing structure.
- the condensing structure has a condensing direction and a non-condensing direction in a plane of the optical sheet, and the optical sheet has a rectangular shape and a long side direction thereof and the condensing element.
- the direction matches.
- the dimensional change due to thermal expansion is larger in the long side direction than in the short side direction, and the optical sheet is locally localized on the basis of the support position due to thermal expansion.
- Such deformation is particularly useful because it tends to affect the light collecting direction in the light collecting structure.
- the condensing structure has a condensing direction and a non-condensing direction in a plane of the optical sheet, and the optical sheet has a rectangular shape and a short side direction thereof and the condensing direction.
- the direction matches.
- the dimensional change due to thermal expansion is greater in the long side direction than in the short side direction.
- the short side direction and the light collecting direction of the optical sheet coincide with each other, even if thermal expansion occurs, a dimensional change hardly occurs in the light collecting direction, and luminance unevenness can be prevented.
- the condensing structure has a condensing direction and a non-condensing direction in a plane of the optical sheet, the condensing direction coincides with a vertical direction, and the non-condensing direction is horizontal. It matches the direction. In this way, even if local deformation based on the support position as a base point occurs in the optical sheet due to thermal expansion, it is possible to prevent uneven brightness from occurring in the horizontal direction.
- the light source has a linear shape extending along one direction in the plane of the optical member, and a plurality of the light sources are arranged in parallel along a direction orthogonal to the axial direction. If it does in this way, since each optical member can be bent convexly to the light source side as a whole by each support member arranged along the parallel direction of the light source which makes a line shape, it becomes suitable for prevention of a brightness nonuniformity.
- the optical member includes an optical sheet having a condensing structure, and the condensing structure has a condensing direction and a non-condensing direction in a plane of the optical sheet, and the light source is parallel to the light source. And the light condensing direction coincide with each other, and the axial direction of the light source coincides with the non-condensing direction. In this way, since it is difficult for the optical sheet to be locally deformed in the parallel direction of the light sources, that is, the light collecting direction in the optical sheet, it is possible to effectively suppress luminance unevenness.
- the support members are arranged in parallel along the axial direction of the light source, in addition to being arranged in parallel along the parallel direction of the light source, and the support members arranged in parallel along the axial direction
- the member is formed such that the support position with respect to the optical member is relatively close to the light source on the center side and relatively far from the light source on the end side. In this way, the optical member can be largely bent into a spherical shape as a whole, which is more suitable for preventing luminance unevenness.
- the support member is provided with a light source holding part capable of holding the light source. If it does in this way, the function to hold
- the light source is a fluorescent tube. If it does in this way, it will become suitable for what uses a fluorescent tube as a light source.
- the light source is a cold cathode tube. If it does in this way, it will become suitable for what uses a cold cathode tube as a light source.
- the light source has a dot shape in the plane of the optical member. If it does in this way, it will become suitable for what uses what makes a point shape as a light source.
- a plurality of the light sources are arranged two-dimensionally in the plane of the optical member, and the arrangement pitch is relatively narrow on the center side and relatively wide on the outer peripheral end side. In this way, even if the optical member is thermally expanded and the distance between the central portion and the light source is shortened, the presence of the light source is more difficult to visually recognize, which is suitable for preventing luminance unevenness.
- the support members are two-dimensionally arranged in parallel in the plane of the optical member, and the support position with respect to the optical member is relatively close to the light source on the center side, and on the outer peripheral end side. It is formed relatively far from the light source.
- the optical member can be largely bent into a spherical shape as a whole, and the light source having a dot shape has a high distribution density on the center side corresponding to the support position of the support member with respect to the optical member, Since the distribution density is lowered on the outer peripheral end side, luminance unevenness can be more effectively prevented.
- the light source is an LED. If it does in this way, it will become suitable for what uses LED as a light source.
- a holding member capable of holding the outer edge portion of the optical member is provided. In this way, when the outer edge portion of the optical member is held by the holding member, when the optical member is thermally expanded, deformation tends to occur intensively on the center side, but the optical member is generally convex on the light source side. Since it is made to warp, the stress which arises in an optical member and a supporting member can be relieved.
- 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 is less likely to cause uneven brightness, and can be thinned, so that the display quality can be improved and the overall thickness can be reduced. It becomes.
- 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.
- luminance unevenness can be prevented and the thickness can be reduced.
- FIG. 1 is an exploded perspective view showing a schematic configuration of a television receiver according to Embodiment 1 of the present invention.
- Enlarged perspective view of lens sheet 3 is a cross-sectional view taken along the line vi-vi in FIG. 3 showing a state before the optical member is thermally expanded.
- 3 is a cross-sectional view taken along the line vii-vii in FIG. 3 showing a state before the optical member is thermally expanded.
- FIG. 3 showing the state before the optical member is thermally expanded.
- 3 is a cross-sectional view taken along line vi-vi in FIG. 3 showing a state where the optical member is thermally expanded.
- FIG. 3 is a cross-sectional view taken along the line vii-vii in FIG.
- FIG. 3 is a cross-sectional view taken along line viii-viii in FIG. 3 is a cross-sectional view taken along the line ix-ix in FIG. 3 showing a state in which the optical member is thermally expanded.
- Enlarged view of FIG. The top view of the backlight apparatus which concerns on Embodiment 2 of this invention.
- Xvi-xvi sectional view of FIG. The top view of the backlight apparatus which concerns on Embodiment 3 of this invention.
- Plan view of lens sheet The top view of the backlight apparatus which concerns on Embodiment 4 of this invention.
- SYMBOLS 10 Liquid crystal display device (display device), 11 ... Liquid crystal panel (display panel), 12 ... Backlight device (illumination device), 14 ... Chassis, 16 ... Optical member, 17 ... Frame (holding member), 18 ... Cold cathode Tube (light source, fluorescent tube), 20 ... support member, 21 ... diffuser plate, 22 ... optical sheet, 22b ... lens sheet (optical sheet with condensing structure), 22b2 ... cylindrical lens (condensing structure), 26a ... projecting Tip (supporting position), 27 ... light source holding part, 28 ... LED (light source), 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
- each axis direction is drawn to be a direction shown in each drawing.
- the Y-axis direction coincides with the vertical direction (vertical direction)
- the X-axis direction coincides with the horizontal direction.
- the upper side shown in FIG. 2 be a front side
- the lower side shown in FIG. 2 be a back side.
- a television receiver TV includes a liquid crystal display device 10 (display device) and a pair of front and back cabinets that are housed so as to sandwich the liquid crystal display device 10 and surround the liquid crystal display device 10 from the outside.
- Ca, Cb, a power source P, a tuner T, and a stand S are provided.
- the liquid crystal display device 10 has a horizontally long rectangular shape as a whole.
- the liquid crystal display device 10 includes a liquid crystal panel 11 that is a rectangular display panel and a backlight device 12 (illumination device) that is an external light source. These are integrally held by the bezel 13 or the like.
- the liquid crystal panel 11 constituting the liquid crystal display device 10 has a rectangular shape in plan view, and a pair of transparent (highly translucent) glass substrates with a predetermined gap therebetween And a liquid crystal layer (not shown) is sealed between both glass substrates.
- 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.
- image data and various control signals necessary for displaying an image from a drive circuit substrate are supplied to the source wiring, the gate wiring, the counter electrode, and the like.
- a polarizing plate is disposed outside each of the glass substrates.
- the backlight device 12 is a so-called direct type backlight in which a light source is arranged directly under the back surface of the liquid crystal panel 11, and is open on the front side (light emission side, liquid crystal panel 11 side).
- the substantially box-shaped chassis 14, the reflection sheet 15 laid in the chassis 14, a plurality of optical members 16 attached so as to cover the openings of the chassis 14, and the optical members 16 are pressed from the front side.
- the frame 17 having the above function, a plurality of cold cathode tubes 18 (linear light sources) accommodated in parallel in the chassis 14, and light-shielding each end portion of the cold cathode tubes 18 and light itself And a holder 19 having reflectivity.
- the backlight device 12 includes a plurality of support members 20 having a light source holding portion 25 that holds the central portion of the cold cathode tube 18 and a support pin 26 that can support the optical member from the back side. ing.
- the chassis 14 is made of metal such as aluminum, and as shown in FIG. 2, the side plate rises from the outer peripheral end of the bottom plate 14 a having a rectangular shape in plan view like the liquid crystal panel 11.
- the long side direction of the bottom plate 14a coincides with the X-axis direction (horizontal direction) of each drawing, and the short side direction coincides with the Y-axis direction (vertical direction).
- the reflection sheet 15 is made of a synthetic resin exhibiting white with excellent light reflectivity and is laid so as to cover almost the entire inner surface of the chassis 14, and transmits light from the cold cathode tube 18 to the optical member 16 side. It has a function of reflecting to the (light emitting side).
- the optical member 16 has a rectangular shape in plan view like the bottom plate 14a of the chassis 14 and the liquid crystal panel 11, and is made of a synthetic resin having translucency.
- the optical member 16 is disposed on the front side (light emission side) of the cold cathode tube 18 on the back side of the liquid crystal panel 11. That is, the optical member 16 is interposed between the cold cathode tube 18 and the liquid crystal panel 11. ing. Accordingly, the linear light emitted from the cold cathode tube 18 is transmitted through the optical member 16 and converted into planar light in the process of reaching the liquid crystal panel 11.
- the optical member 16 is sequentially laminated with a diffusion plate 21 positioned on the farthest rear side and disposed opposite to the cold cathode tube 18 and the support member 20, and a plurality of optical sheets 22 disposed on the front side of the diffusion plate 21.
- the diffusion plate 21 is made of a synthetic resin (for example, made of polystyrene) and contains a large number of diffusion particles that diffuse light in a base material having a predetermined plate thickness (for example, about 1.5 mm to 2 mm). . Further, the softening temperature of the diffusion plate 21 is, for example, about 80 degrees.
- the optical sheet 22 is thinner than the diffusion plate 21 described above and includes three different types. The diffusion sheet 22a, the lens sheet 22b, and the reflection type are provided from the diffusion plate 21 side (back side). The polarizing plates 22c are stacked in this order.
- a lens sheet 22b sandwiched between a diffusion sheet 22a and a reflective polarizing plate 22c is a convex cylindrical lens as a condensing structure on the surface of a base material 22b1, as shown in FIGS.
- a so-called lenticular lens sheet is formed by arranging 22b2 in parallel. Therefore, it can be said that this lens sheet 22b has anisotropy in condensing.
- the cylindrical lens 22b2 is configured such that its light exit surface has an arc shape and its cross-sectional shape is substantially semi-cylindrical, and extends along the long side direction on the surface of the lens sheet 22b.
- the cylindrical lens 22b2 has a condensing direction and a non-condensing direction in the plane of the lens sheet 22b, and the condensing direction is the same as the short side direction (Y-axis direction, vertical direction) of the lens sheet 22b.
- the non-condensing direction coincides with the long side direction (X-axis direction, horizontal direction) of the lens sheet 22b.
- the frame 17 has a frame shape along the outer peripheral edge of the liquid crystal panel 11 and the optical member 16.
- the frame 17 is arranged on the front side of the optical member 16 and can sandwich the outer peripheral edge of the optical member 16 with the holder 19.
- the frame 17 can receive the liquid crystal panel 11 from the back side (the side opposite to the light emitting side, the side opposite to the liquid crystal panel 11 side), and a bezel arranged on the front side of the liquid crystal panel 11.
- the liquid crystal panel 11 can be held between
- the bezel 13 is made of metal and is formed in a frame shape so as to surround the display area of the liquid crystal panel 11 like the frame 17, and presses the outer peripheral edge (non-display area, frame portion) of the liquid crystal panel 11 from the front side. Is possible.
- the cold-cathode tube 18 is a kind of linear light source (tubular light source) that linearly extends in one direction, and the chassis 14 is in a posture in which the axial direction thereof coincides with the long side direction (X-axis direction) of the chassis 14.
- a total of 12 are arranged along the short side direction (Y-axis direction) of the chassis 14 with their axes substantially parallel to each other and with a predetermined interval therebetween. . Therefore, it can be said that the cold cathode tube 18 is accommodated in the chassis 14 in such a posture that the axial direction thereof coincides with the horizontal direction and the parallel direction thereof coincides with the vertical direction.
- the cold cathode tube 18 is accommodated in the chassis 14 in such a posture that the axial direction thereof coincides with the non-condensing direction in the lens sheet 22b and the parallel direction coincides with the condensing direction in the lens sheet 22b. (See FIG. 4).
- rubber holders 23 are respectively fitted to both ends of the cold cathode tube 18.
- the holder 19 is made of a synthetic resin exhibiting white light with excellent light reflectivity, and has a substantially box shape extending along the short side direction of the chassis 14 and having an open back surface.
- a pair of holders 19 are attached to both end portions of the chassis 14 in the long side direction so that the end portions (non-light emitting portions) of the cold cathode tubes 18 arranged in parallel at the same position can be collectively covered. It has become.
- a stepped portion is provided at the inner end portion of the front side surface of the holder 19, and an outer edge portion on the short side of the optical member 16 is placed thereon, and between the frame 17 and the above-described frame 17. The optical member 16 can be clamped.
- the support member 20 is made of a synthetic resin (for example, made of polycarbonate) exhibiting white having excellent light reflectivity. As shown in FIG. 3, the support member 20 is two-dimensionally distributed with a predetermined distribution on the inner surface of the bottom plate 14 a of the chassis 14. Distributed. Specifically, 24 support members 20 are arranged in a zigzag shape (staggered and staggered) in total in the bottom plate 14a, and four rows are arranged in a line along the long side direction of the bottom plate 14a. And arranged in a matrix so as to have eight rows arranged in a straight line along the short side direction of the bottom plate 14a.
- a synthetic resin for example, made of polycarbonate
- each support member 20 is arranged symmetrically with respect to the bottom plate 14 a of the chassis 14 and the center C of the optical member 16.
- the arrangement pitch of the support members 20 arranged in the row direction is substantially constant.
- the distance in the row direction between the support members 20 that form adjacent rows is substantially constant.
- Each cold cathode tube 18 is held by each support member 20 arranged in the row direction at four positions separated in the axial direction.
- the support member 20 includes a substantially plate-shaped main body 24 that extends along the bottom plate 14 a of the chassis 14.
- the main body 24 has a substantially rectangular shape in plan view, and its long side direction is made to coincide with the parallel direction of the cold cathode tubes 18 (the short side direction of the chassis 14 and the Y-axis direction), and the short side direction is the cold cathode tube. It is attached to the bottom plate 14a in a posture that matches the 18 axial directions (long side direction of the chassis 14, X-axis direction).
- the light source holding portion 25 and the support pin 26 described above are provided on the front side surface (the surface facing the cold cathode tube 18 and the optical member 16 side) of the main body 24.
- a mounting portion 27 for mounting the support member 20 to the chassis 14 is provided on the back surface (the surface facing the bottom plate 14a side of the chassis 14).
- the two light source holding parts 25 are installed side by side at positions separated from each other in the long side direction of the main body part 24, and each holds a different cold cathode tube 18.
- the light source holding part 25 has a pair of cantilevered arm parts rising from the main body part 24 to the front side, and the cold cathode tube 18 can be elastically held between the both arm parts.
- the arrangement pitch between the light source holding portions 25 adjacent to each other in the Y-axis direction matches the arrangement pitch of the cold cathode tubes 18 arranged in parallel in the chassis 14 (FIG. 3).
- the support pin 26 is disposed between the pair of light source holding portions 25 in the main body portion 24. Specifically, the support pin 26 is disposed substantially at the center of the main body portion 24 (a central position in the long side direction and the short side direction), and is located in the center between the adjacent light source holding portions 25. That is, the distance between the support pin 26 and each adjacent light source holding part 25 is substantially equal to each other.
- the support pin 26 has a substantially conical shape in which the diameter is reduced toward the protruding tip side, and the protruding height from the main body portion 24 is set higher than that of the light source holding portion 25.
- the protruding tip 26a of the support pin 26 is brought into contact with the back surface of the diffusion plate 21 of the optical member 16, so that the diffusion plate 21 is separated from the cold cathode tube 18 on the front side and is not in contact with the cold cathode tube 18. It can be supported in position. Thereby, the positional relationship between the optical member 16 and the cold cathode tube 18 in the Z-axis direction (direction orthogonal to the plate surface of the optical member 16) is defined, and the distance between the optical member 16 and the cold cathode tube 18 is set. It can be maintained above a certain value. In other words, the distance between the optical member 16 and the cold cathode tube 18 can be regulated so as not to become a certain value or less.
- the protruding tip 26 a of the support pin 26 is a support position for the optical member 16.
- this support pin 26 is a part which protrudes most to the front side in the support member 20, when attaching / detaching the support member 20 with respect to the chassis 14, the operation part which an operator hold
- a pair of the mounting portions 27 described above is arranged on the back surface of the main body portion 24 at a position overlapping the light source holding portion 25 in plan view.
- the attachment portion 27 includes a base portion that protrudes from the main body portion 24 to the back side, and a pair of locking portions that are folded back from the protruding end of the base portion to the main body portion 24 side.
- the support members 20 that are two-dimensionally distributed in the plane of the bottom plate 14 a of the chassis 14 and the optical member 16 are projected heights of the support pins 26 from the main body 24, that is, the optical members. 16 are formed such that the support positions thereof are different from each other, and are relatively lower at the center side in the plane and relatively higher at the outer peripheral end side.
- the height position of the protruding tip portion 26a of the support pin 26 in the Z-axis direction is continuous from the center side of the bottom plate 14a and the optical member 16 toward the outer peripheral end side, as shown in FIGS. On the contrary, it gradually decreases gradually from the outer peripheral end side toward the center side. That is, the protruding dimension of the support pin 26 from the main body 24 tends to be proportional to the distance from the bottom plate 14a and the center C of the optical member 16 (FIG. 3), and the line connecting the protruding tip 26a is It has a substantially arc shape that is convex on the back side (FIGS. 6 to 9).
- the high protruding tip 26a of the support pin 26 means that the support position for the optical member 16 is far from the cold cathode tube 18 (the distance to the cold cathode tube 18 is long).
- the low protruding tip 26a means that the support position for the optical member 16 is close to the cold cathode tube 18 (the distance to the cold cathode tube 18 is short). If the supporting position of the optical member 16 is lowered, it is suitable for thinning the whole, but the presence of the cold cathode tube 18, that is, the so-called lamp image tends to be visually recognized from the front side through the optical member 16, and the luminance is increased. Unevenness tends to occur.
- each support pin 26 in order to represent the protruding height of each support pin 26 from the main body 24, the signs H 1 to H 12 are appropriately marked in order from the lowest, and each support pin 26 is distinguished. Therefore, the symbols of the support pins 26 are in order from the lowest support position with respect to the optical member 16 (closest to the center C) to the highest support position with respect to the optical member 16 (most distant from the center C). The subscripts -1 to -12 are added.
- the support pins 26 of the support members 20 that form a predetermined row (aligned along the Y-axis direction)
- the support position with respect to the optical member 16 is lower as it is closer to the line L1 passing through the center C along the direction, and the support position with respect to the optical member 16 is higher as it is farther away.
- the support pin 26 of each support member 20 that forms a predetermined row is closer to the line L2 that passes through the center C along the Y-axis direction, and the support position with respect to the optical member 16 The lower the distance, the higher the support position with respect to the optical member 16.
- the support pin 26-12 having the highest support position with respect to the optical member 16 is not deformed by the influence of heat and has a substantially straight shape along the X-axis direction and the Y-axis direction, as shown in FIG. It has a protruding height that does not reach the back surface of the diffuser plate 21 and is non-contact. Accordingly, a predetermined gap is secured between the protruding tip portion 26a of the support pin 26 of each support member 20 and the diffusion plate 21 having a substantially straight shape, and the diffusion plate 21 is within the gap. It is allowed to warp and deform. Since this gap is wider toward the center side of the diffusion plate 21 and narrower toward the outer peripheral end side of the diffusion plate 21, the diffusion plate 21 can be bent convexly on the back side.
- the cold cathode fluorescent lamps 18 arranged in parallel along the Y-axis direction have different arrangement pitches depending on the installation positions, and the surface of the bottom plate 14 a of the chassis 14 and the optical member 16.
- the inner side is relatively narrower
- the end side in the Y-axis direction is relatively wider
- the pitches are arranged in an irregular pitch in a gradation.
- the arrangement pitch of the cold cathode tubes 18 continuously increases gradually from the center side in the plane toward the end side in the Y-axis direction, and conversely continues from the end side in the Y-axis direction toward the center side. It gradually becomes narrower.
- the arrangement pitch of the cold cathode tubes 18 tends to be proportional to the distance from the center C of the bottom plate 14 a and the optical member 16.
- Each cold-cathode tube 18 has a line-symmetric arrangement with a line L1 passing through the center C along the X-axis direction as a center line.
- the narrow arrangement pitch of the cold cathode tubes 18 means that the distribution density and brightness of the cold cathode tubes 18 in the plane of the optical member 16 are relatively high, and the arrangement pitch of the cold cathode tubes 18 is wide. This means that the distribution density and the luminance of the cold cathode tubes 18 in the plane of the optical member 16 are relatively low.
- the arrangement pitch of the cold cathode tubes 18 is relatively narrow on the center side where the support position of the optical member 16 by the support member 20 is relatively low, whereas the optical by the support member 20 is relatively small.
- the arrangement pitch of the cold cathode tubes 18 is relatively wide.
- the distance between the support position in the optical member 16 and the cold cathode tube 18 is changed by changing the arrangement pitch of the cold cathode tubes 18 corresponding to the support position of the optical member 16 as described above. Is set so that the ratio obtained by dividing by the arrangement pitch of the cold-cathode tubes 18 falls within a predetermined reference numerical value range.
- the above ratio By setting the above ratio to be equal to or higher than the lower limit value of the reference numerical value range, luminance unevenness hardly occurs in the plane of the optical member 16, and by setting the ratio to be equal to or lower than the upper limit value of the reference numerical value range, the whole can be made as thin as possible. At the same time, the number of cold cathode tubes 18 can be reduced as much as possible.
- the arrangement pitch in the Y-axis direction of the support members 20 arranged in a row is set to the center side in accordance with the arrangement pitch of the cold cathode tubes 18 described above.
- the end side tend to be narrower toward the center side and wider toward the end side.
- the arrangement pitch in the Y-axis direction of each support member 20 is set so as to be gradually and gradually narrowed from the center side to the end side, and gradually and gradually widen from the end side to the center side. Yes.
- the distribution density of the support pins 26 in the Y-axis direction is relatively high on the center side and relatively low on the end side.
- the arrangement pitch of the support members 20 refers to the center between the support members 20 adjacent in the Y-axis direction, that is, the distance between the support pins 26 adjacent in the Y-axis direction.
- the long side dimension in the main-body part 24 of each support member 20 changes according to the installation position in the chassis 14, and is small at the center side about the Y-axis direction, and is large at the end side.
- the installation position of the light source holding part 25 in each main body part 24 also differs depending on the installation position in the chassis 14.
- the diffusion plate 21 has a substantially straight shape along the X-axis direction and the Y-axis direction as shown in FIGS. 6 to 9, and the optical sheets 22 stacked on the front side thereof. Similarly, the shape is almost straight. In this state, a predetermined gap is held between the back surface of the diffusion plate 21 and the support pin 26 of each support member 20, and as described above, the gap is larger toward the center side and closer to the outer peripheral end side. It tends to be smaller.
- the cold cathode tube 18 in the backlight device 12 is turned on or off, so that the internal temperature environment changes.
- the internal space of the backlight device 12 has a large number of cold cathode tubes 18 as heat sources, it tends to be hotter than the external space.
- the back side of the diffusion plate 21 becomes relatively high temperature
- the front side of the diffusion plate 21 becomes relatively low temperature and a temperature difference is generated, which causes the diffusion plate 21 to thermally expand. It may be warped and deformed. Even in that case, since the gap is held between the diffusion plate 21 and each support pin 26 as described above, the warp deformation of the diffusion plate 21 is allowed within the range of the gap.
- the diffuser plate 21 can be largely warped convexly toward the cold cathode tube 18 as a whole.
- the diffusion plate 21 is gently curved in a substantially arc shape (bow shape) two-dimensionally and in a substantially spherical shape three-dimensionally along a line connecting the protruding tip portions 26a of the support pins 26. .
- the optical sheets 22 stacked on the diffusion plate 21 are also warped and deformed into the same shape following the diffusion plate 21.
- the diffusion plate 21 is abutted against the projecting tip portion 26a of each support pin 26, so that it is further displaced to the back side, that is, further restricted from approaching the cold cathode tube 18.
- stress may be generated in the support pin 26 and the diffusion plate 21 by the projecting tip portions 26a of the support pins 26 coming into contact with the diffusion plate 21, but the diffusion plate 21 protrudes greatly in advance in the initial stage of thermal expansion. Therefore, even if the stress is generated, it is relaxed to a very small amount.
- the diffuser plate 21 is further thermally expanded from the state in which the protruding tip portion 26a of each support pin 26 is in contact with the diffuser plate 21, the diffuser plate 21 is supported by each support pin 26 as shown in FIG.
- the deformation may be locally deformed with the position as a base point.
- the diffusion plate 21 is largely warped and deformed in advance in the initial stage of thermal expansion, the local deformation is also reduced to a very small amount. ing.
- Each optical sheet 22 laminated on the diffusion plate 21 is also greatly warped and deformed in the same shape as the diffusion plate 21 in the initial stage of thermal expansion, and the occurrence of local deformation is suppressed.
- the lens sheet 22b having a remarkable optical anisotropy among the optical sheets 22 if the amount of local deformation is large, the distribution of outgoing light in the surface tends to be biased. By suppressing the general deformation, the occurrence of luminance unevenness is effectively suppressed.
- each cold cathode tube 18 is converted into substantially uniform planar light with no deviation in the plane in the process of passing through the diffusion plate 21 and each optical sheet 22. Then, the light is emitted toward the liquid crystal panel 11. Thereby, even if the optical member 16 is thermally expanded, uneven brightness is less likely to occur.
- the support position by the support member 20 is relatively lower than the outer peripheral end side at the center side of the diffusion plate 21, and the distance between the cold cathode tube 18 and the optical member 16 becomes small. ing. When the distance between the cold cathode tube 18 and the optical member 16 is reduced, the lamp image tends to be easily viewed through the optical member 16.
- the center side is relatively narrower than the end side, and the distribution density of the cold cathode tubes 18 on the center side is relatively Since it is high, even if the distance between the cold cathode tube 18 and the optical member 16 is reduced on the center side, it is difficult to visually recognize the lamp image. Thereby, even if it is a case where the support position of the optical member 16 by the support member 20 is set as low as possible, a brightness nonuniformity can be prevented effectively. In other words, by arranging the cold cathode tubes 18 as described above, the support position of the optical member 16 by the support member 20 can be lowered beyond the limit. Thinning of the liquid crystal display device 10 can be realized.
- the backlight device 12 of the present embodiment includes the chassis 14 that opens to the light emitting side, the cold cathode tubes 18 that are the light sources housed in the chassis 14 and arranged in parallel, and the cold cathodes.
- An optical member 16 disposed on the light emission side of the tube 18 and covering the opening of the chassis 14, and the optical member 16 can be supported from the side opposite to the light emission side.
- the support member 20 is arranged in parallel, and the support member 20 is relatively close to the cold cathode tube 18 at the center side and relatively far from the cold cathode tube 18 at the end side.
- the cold cathode tubes 18 are arranged so that the arrangement pitch is relatively narrow on the center side and relatively wide on the end side.
- the support position of the support member 20 with respect to the optical member 16 is relatively close to the cold cathode tube 18 on the center side and relatively far from the cold cathode tube 18 on the end side.
- the optical member 16 can be largely bent convexly toward the cold cathode tube 18 as a whole. Therefore, the stress acting at each support position can be relaxed in a state where the optical member 16 is supported by the support member 20. Thereby, it can suppress that the optical member 16 deform
- the optical member 16 when the optical member 16 is convexly warped toward the cold cathode tube 18 as a whole, the distance between the cold cathode tube 18 and the optical member 16 is reduced on the center side.
- the presence of the cathode tube 18 tends to be visually recognized.
- the arrangement pitch of the cold cathode tubes 18 is set to be relatively narrow on the center side, and the distribution density of the cold cathode tubes 18 on the center side is increased. Therefore, the optical member 16 and the cold cathode are arranged on the center side. Even if the distance from the tube 18 is reduced, the presence of the cold cathode tube 18 is difficult to be visually recognized, and uneven brightness is less likely to occur. In other words, since the support position of the support member 20 with respect to the optical member 16 can be as close as possible to the cold cathode tube 18, the overall thickness can be reduced.
- the cold cathode tubes 18 are arranged so that the arrangement pitch thereof becomes gradually wider gradually from the center side toward the end side. By doing so, the distribution density of the cold cathode fluorescent lamps 18 can be gently changed in the plane of the optical member 16, which is more suitable for preventing luminance unevenness.
- the support member 20 is formed so that the support position with respect to the optical member 16 gradually and gradually moves away from the cold cathode tube 18 from the center side toward the end side. In this way, the optical member 16 can be supported in a gently curved shape at the time of thermal expansion, so that local deformation is less likely to occur in the optical member 16, and this is more suitable for preventing luminance unevenness.
- the support member 20 is formed so that a line connecting the support positions with respect to the optical member 16 forms a substantially arc-shaped curve. In this way, the optical member 16 can be supported in a more gently curved shape during thermal expansion.
- the support member 20 is formed so that the support position with respect to the optical member 16 is disposed between the adjacent cold cathode tubes 18. By doing so, the light from the cold cathode fluorescent lamp 18 is not easily blocked by the support member 20, which is more suitable for preventing luminance unevenness.
- the support member 20 is formed so that the support position for the optical member 16 is arranged at the center between the adjacent cold cathode tubes 18. In this way, since the distance between the support position of the support member 20 relative to the optical member 16 and the adjacent cold cathode tube 18 becomes substantially equal, it is more suitable for preventing uneven brightness.
- the support members 20 are arranged so that the arrangement pitch is relatively narrow on the center side and relatively wide on the end side. In this way, when the optical member 16 is thermally expanded, a greater stress tends to act on the center side than on the end side, but more support members 20 are arranged on the center side. The stress acting on the member 20 can be relaxed. As a result, rubbing hardly occurs between the optical member 16 and the support member 20 at the support position, and it is possible to suppress the occurrence of a squeaking noise.
- a plurality of optical members 16 are stacked. In this way, in the case where a plurality of the optical members 16 are laminated, if a local deformation occurs, there is a possibility that a great optical adverse effect may occur, which is useful.
- the optical member 16 includes a diffusion material that diffuses light and can be directly supported by the support member 20, and an optical sheet 22 that is laminated on the light emission side with respect to the diffusion plate 21.
- the optical sheet 22 includes at least a lens sheet 22b having a condensing structure. In this way, the lens sheet 22b having a condensing structure is particularly useful because it tends to cause luminance unevenness when local deformation occurs.
- the light condensing structure has anisotropy in light condensing. In this way, if the light collecting structure has anisotropy, the lens sheet 22b is more useful because local unevenness is more likely to cause uneven brightness.
- the light converging structure is composed of a large number of cylindrical lenses 22b2 arranged in parallel. This makes it useful for the cylindrical lens 22b2 having a condensing structure.
- the said condensing structure has a condensing direction and a non-condensing direction in the surface of the lens sheet 22b, and the lens sheet 22b has a rectangular shape and its short side direction and condensing direction. Match.
- the dimensional change due to thermal expansion is larger in the long side direction than in the short side direction.
- the lens sheet 22b has a short side direction and a condensing direction that coincide with each other, even if thermal expansion occurs, a dimensional change hardly occurs in the condensing direction, and luminance unevenness can be prevented. .
- the condensing structure has a condensing direction and a non-condensing direction in the plane of the lens sheet 22b, the condensing direction coincides with the vertical direction, and the non-condensing direction coincides with the horizontal direction. I'm doing it. In this way, even if local deformation based on the support position as a base point occurs in the lens sheet 22b due to thermal expansion, luminance unevenness in the horizontal direction is prevented.
- the cold cathode tubes 18 have a linear shape extending in one direction in the plane of the optical member 16, and a plurality of the cold cathode tubes 18 are arranged in parallel along a direction orthogonal to the axial direction.
- the optical member 16 can be bent convexly toward the cold cathode tube 18 as a whole by the support members 20 arranged in parallel along the parallel direction of the cold cathode tube 18 having a linear shape. Suitable for preventing unevenness.
- the optical member 16 includes a lens sheet 22b as the optical sheet 22 having a condensing structure.
- the condensing structure has a condensing direction and a non-condensing direction in the plane of the lens sheet 22b.
- the parallel direction of the tubes 18 and the condensing direction coincide with each other, and the axial direction of the cold cathode tube 18 and the non-condensing direction coincide with each other. In this way, since it is difficult for local deformation to occur in the lens sheet 22b in the parallel direction of the cold cathode tubes 18, that is, in the condensing direction in the lens sheet 22b, uneven luminance can be effectively suppressed. .
- a plurality of support members 20 are arranged in parallel along the axial direction of the cold cathode tubes 18, and are arranged in parallel along the axial direction.
- the support member 20 is formed such that the support position with respect to the optical member 16 is relatively close to the cold cathode tube 18 on the center side and relatively far from the cold cathode tube 18 on the end side. In this way, the optical member 16 can be largely curved into a spherical shape as a whole, which is more suitable for preventing luminance unevenness.
- the support member 20 is provided with a light source holding part 25 capable of holding the cold cathode tube 18. In this way, it is possible to add a function of holding the cold cathode tube 18 having a linear shape to the support member 20.
- a frame 17 capable of holding the outer edge portion of the optical member 16 is provided. In this way, when the outer edge portion of the optical member 16 is held by the holding member, when the optical member 16 thermally expands, deformation tends to occur intensively on the center side. Since the tube 18 is bent in a convex manner, the stress generated in the optical member 16 and the support member 20 can be relaxed.
- the support members 20A are arranged such that the arrangement pitch in the Y-axis direction (the short side direction of the chassis 14A) is relatively narrow toward the center side and relatively wide toward the end side.
- the arrangement pitches SPT1 and SPT2 in the X-axis direction are relatively narrow toward the center side and relatively wide toward the end side. That is, the support members 20A arranged two-dimensionally in parallel in the plane of the bottom plate 14aA and the optical member 16A are arranged such that the arrangement pitch is relatively narrow toward the center and relatively wide toward the outer peripheral end side.
- the distribution density of the support pins 26A in the plane of the optical member 16A is higher on the center side than on the outer peripheral end side, the stress acting on each support pin 26A that supports the center portion of the optical member 16A.
- the central portion of the optical member 16A is a portion where the dimensional change due to thermal expansion is more likely to occur than the portion on the outer peripheral end side that is held and restrained by the frame 17A or the like. Tends to work. Accordingly, by dispersing the stress acting on the support pin 26A on the center side as described above, it is possible to cause friction between the diffusion plate 21A and the support pin 26A due to the stress, or to generate a squeaking noise. It can be effectively suppressed.
- Embodiment 3 A third embodiment of the present invention will be described with reference to FIG. 17 or FIG. In this Embodiment 3, what changed the usage form of the backlight apparatus 12B, the arrangement
- the same parts as those in the first embodiment are denoted by the same reference numerals and suffixed with a subscript B, and redundant description of the structure, operation, and effect is omitted.
- the long side direction of the chassis 14B is matched with the vertical direction (Y-axis direction), and the short side direction of the chassis 14B is matched with the horizontal direction (X-axis direction). It is used in the form.
- the cold cathode fluorescent lamps 18B accommodated in the chassis 14B have a posture in which the axial direction thereof coincides with the short side direction of the chassis 14B, and a total of twelve are arranged in parallel along the long side direction of the chassis 14B. ing.
- the cold cathode tubes 18B are arranged such that the arrangement pitch is narrower toward the center side in the long side direction of the chassis 14B and wider toward the end side, and is arranged in an uneven pitch in a gradation.
- the support member 20B is distributed in a zigzag manner within the surface of the bottom plate 14aB of the chassis 14B, and has six rows arranged in a straight line along the short side direction of the chassis 14B. Eight columns are arranged in a line along the direction.
- the support members 20B are also arranged in an irregular pitch with a gradation similar to that of the cold cathode fluorescent lamp 18B.
- the dimensional change due to thermal expansion and contraction tends to be larger in the long side direction than in the short side direction.
- the optical member 16B thermally expands while being supported by the support pins 26B of the respective support members 20B, and local deformation occurs with each support position as a base point, the optical member 16B has a longer side direction than the short side direction.
- the amount of deformation tends to be large.
- the cold cathode fluorescent lamps 18B having a linear shape are arranged in parallel along the long side direction of the optical member 16B, and the distribution density is increased toward the center side in the long side direction. Even if the amount of deformation increases on the center side in the long side direction of 16B, luminance unevenness can be effectively suppressed.
- the axial direction of the cylindrical lens 22b2B having a condensing structure is set to the short side direction of the lens sheet 22bB (the axial direction of the cold cathode tube 18B).
- the lens sheet 22bB has a configuration in which the long side direction and the light condensing direction coincide with each other, and the short side direction and the non-condensing direction coincide with each other.
- the light collecting direction is affected, and there is a possibility that the light collecting direction may vary, for example, between the non-deformed region and the deformed region or between different deformed regions.
- the distribution density of the cold cathode fluorescent lamps 18B is increased toward the center in the long side direction, so that luminance unevenness can be suppressed even if there is some variation in the light collecting direction. it can.
- the condensing structure of the lens sheet 22bB has a condensing direction and a non-condensing direction in the plane, and the lens sheet 22bB has a rectangular shape. And the long side direction and the condensing direction correspond.
- the dimensional change due to thermal expansion is larger in the long side direction than in the short side direction, and the support position is based on the lens sheet 22bB due to thermal expansion.
- it is particularly useful because it tends to affect the light collecting direction in the light collecting structure.
- Embodiment 4 A fourth embodiment of the present invention will be described with reference to FIGS. In this Embodiment 4, what changed the light source into LED28 is shown.
- the same parts as those in the first embodiment are denoted by the same reference numerals and suffixed with a suffix C, and redundant description of the structure, operation, and effect is omitted.
- the backlight device 12C includes an LED 28 (Light-Emitting Diode) as a light source having a point shape in the plane of the optical member 16C (within the light-emitting surface).
- the LED 28 is mounted on the LED substrate 29 and incorporates three LED chips (not shown) that emit R (red), G (green), and B (blue) in a single color and emit white light as a whole. It is possible.
- the LED substrates 29 have a rectangular shape in which the X-axis direction coincides with the long side, and three LED substrates 29 are arranged in a matrix in the X-axis direction and the Y-axis direction in the chassis 14C.
- LEDs 28 are two-dimensionally arranged in the plane of the bottom plate 14aC and the optical member 16C of the chassis 14C, and the arrangement pitch is relatively narrow toward the center side and relatively wide toward the outer peripheral end side.
- the arrangement pitch of the LEDs 28 gradually increases gradually from the central side toward the outer peripheral end side, and gradually decreases gradually from the outer peripheral end side toward the central side. Thereby, the distribution density of the LEDs 28 in the plane of the bottom plate 14aC and the optical member 16C is high on the center side and low on the outer peripheral end side.
- the LEDs 28 are arranged in a zigzag pattern on each LED substrate 29, but the arrangement pattern thereof differs depending on the installation position of each LED substrate 29 in the chassis 14C. That is, since the center of the LED board 29 arranged in the center of the chassis 14C coincides with the center CC of the chassis 14C, the LED 28 mounted thereon is narrower in the arrangement pitch toward the center side of the LED board 29, The LED board 29 tends to become wider toward the outer peripheral end side. On the other hand, the LEDs 28 mounted on the LED board 29 on the outer peripheral side surrounding the central LED board 29 are arranged according to the relative positional relationship between the LED board 29 and the center CC of the chassis 14C.
- the arrangement pitch is narrower toward the outer end side closer to the center CC of the LED substrate 29, and the arrangement pitch is wider toward the outer end side farther from the center CC.
- the LEDs 28 are arranged radially from the center plate CC of the bottom plate 14aC and the optical member 16C, and the arrangement pitch thereof is substantially proportional to the distance from the center CC of the bottom plate 14aC and the optical member 16C.
- the support member 20C since the LED 28 mounted on the LED substrate 29 is used as a light source, the support member 20C does not need to have a light source holding function. Therefore, the support member 20C according to the present embodiment is configured such that the light source holding part 25 is removed from the support member 20 shown in the first to third embodiments. That is, the support member 20C includes a main body portion 24C extending along the bottom plate 14aC of the chassis 14C, a support pin 26C protruding from the front surface of the main body portion 24C, and an attachment portion protruding from the rear surface of the main body portion 24C. 27C.
- a pair of support members 20 ⁇ / b> C are arranged at diagonal positions on each LED substrate 29. That is, the support members 20C are two-dimensionally arranged in parallel in the plane of the bottom plate 14aC of the chassis 14C and the optical member 16C. As shown in FIGS. 20 to 23, each support member 20C has a protrusion dimension of the support pin 26C from the main body 24C that is relatively lower toward the center in the plane and relatively higher toward the outer peripheral end. It is formed to become. Specifically, the protruding dimension of the support pin 26C continuously increases gradually from the center side to the outer peripheral end side of the bottom plate 14aC and the optical member 16C, and conversely decreases gradually from the outer peripheral end side to the central side.
- the mounting portion 27C penetrates the LED board 29 and is inserted into the mounting hole of the bottom plate 14aC of the chassis 14C, so that the support member 20C and the LED board 29 can be held in the mounting state with respect to the chassis 14C. .
- the arrangement pitch of the LEDs 28 is relatively narrow on the center side where the support position of the optical member 16C by the support member 20C is relatively low, whereas the optical member 16C of the support member 20C is relatively narrow. On the outer peripheral end side where the support position is relatively high, the arrangement pitch of the LEDs 28 is relatively wide.
- the support position of the support member 20C with respect to the optical member 16C and the arrangement pitch of the LEDs 28 are associated with each other and are two-dimensionally changed in the plane of the optical member 16C, so Since the relationship between the support position and the arrangement pitch of the LEDs 28 in the region is optimized, the optical member 16C is warped and deformed into a spherical shape that protrudes toward the LED 28 due to thermal expansion, and the space between each LED 28 and the optical member 16C is increased. Even in the case where the distance is different for each LED 28, luminance unevenness is more effectively prevented in the entire region within the surface of the optical member 16C.
- the light source is the LED 28 having a dot shape in the plane of the optical member 16C. If it does in this way, it will become suitable for what uses LED28 which makes dot shape as a light source.
- the LEDs 28 are two-dimensionally arranged in parallel in the plane of the optical member 16C, and the arrangement pitch is relatively narrow on the center side and relatively wide on the outer peripheral end side. In this way, even if the optical member 16C is thermally expanded and the distance between the central portion thereof and the LED 28 is reduced, the presence of the LED 28 becomes more difficult to visually recognize, which is more suitable for preventing luminance unevenness.
- the support member 20C is two-dimensionally arranged in parallel in the plane of the optical member 16C, and the support position with respect to the optical member 16C is relatively close to the LED 28 on the center side, and relatively on the outer peripheral end side.
- the LED 28 is formed so as to be far from the LED 28. In this way, the optical member 16C can be largely bent into a spherical shape as a whole.
- the LED 28 having a dot shape has a distribution density on the center side corresponding to the support position of the support member 20C with respect to the optical member 16. Since the distribution density is low at the outer peripheral end side, luminance unevenness can be more effectively prevented.
- the support position for the optical member by the support member has been set to be gradually higher from the center side toward the end side.
- the support member supports the optical member by the support member.
- a configuration in which the position is set to be gradually increased from the central side toward the end side is also included in the present invention.
- the support position with respect to the optical member by the support members arranged in the parallel direction of the cold cathode tubes is changed, and the optical member by the support members arranged in the axial direction of the cold cathode tubes
- the support position with respect to the optical member may be constant for the support members arranged along the axial direction of the cold cathode fluorescent lamp.
- the support member having the light source holding portion is used.
- the support member from which the light source holding portion is removed as shown in Embodiment 4 may be used. .
- the support members are two-dimensionally arranged in parallel in the plane of the chassis.
- the present invention also includes the support members arranged in parallel only in one direction. included.
- a plurality of support members are arranged in parallel only in the parallel direction of the cold cathode tubes, and the support members are not arranged in parallel in the axial direction of the cold cathode tubes. it can.
- a plurality of support members can be juxtaposed only along the X-axis direction, or conversely, a plurality of support members can be juxtaposed only along the Y-axis direction.
- the support members are regularly arranged in a matrix in the plane of the chassis.
- the support members are irregularly arranged in the plane of the chassis. Included in the invention.
- the support pin is arranged at the center between adjacent cold cathode tubes. However, the support pin is located at a position eccentric from the center between adjacent cold cathode tubes. May be arranged.
- the support pin is disposed between the adjacent light sources.
- the support pin is disposed immediately above the light source, that is, the support pin and the light source are superimposed in plan view. Such an arrangement is also included in the present invention.
- the installation position and the number of installations of the support members in the chassis can be changed as appropriate.
- the specific shape of the support pins, the number of installed pins in the main body, and the like can be changed as appropriate.
- the specific shape and the number of installed light source holding portions can be changed as appropriate.
- the plug-type mounting portion is used as the mounting structure for the support member to the chassis.
- a sliding system may be used as the mounting structure. With this slide-type mounting structure, the mounting part is hook-shaped, and the main body part is pushed toward the bottom plate of the chassis, and then the main body part is slid along the bottom plate to attach to the edge of the mounting hole. The thing which latches the hook-shaped part of a part.
- the arrangement pitch of the light sources (cold cathode fluorescent lamps, LEDs) is set to be gradually and gradually widened from the center side toward the end side.
- the setting is such that the width gradually increases stepwise from the center side toward the end side.
- the cold cathode tube has a length corresponding to one side of the chassis.
- the length of the cold cathode tube is shorter than each side of the chassis.
- a configuration in which the two-dimensionally arranged in the plane of the chassis is included in the present invention.
- the arrangement pitch of the cold cathode fluorescent lamps can be narrowed toward the center side and widened toward the outer peripheral end side, and can be changed two-dimensionally.
- the end portion of the cold-cathode tube is provided with a rubber holder, but a base or outer lead is provided at the end of the cold-cathode tube, and the base or outer lead is attached to the chassis.
- the present invention can also be applied to a backlight device having a configuration in which power can be supplied from the inverter board by contacting the terminal of the installed connector.
- a cold cathode tube that is a fluorescent tube is used as a linear light source.
- a discharge tube such as a mercury lamp or a xenon lamp. It is also possible to use.
- a linear light source is a light source in which a large number of LEDs are dispersedly installed on the outer peripheral surface of a rod-like base material.
- an LED is used as a light source having a spot shape, but it is of course possible to use other types of light sources having a spot shape.
- the light source using either a linear light source or a point light source is shown.
- a linear light source and a point light source are mixed. are also included in the present invention.
- a linear light source or a point light source is used.
- a configuration in which a plurality of planar light sources are arranged in parallel is also included in the present invention. .
- the optical member is shown to be substantially straight in a normal temperature environment.
- an optical member having a shape that warps convex toward the light source side in a normal temperature environment. It is. In that case, it is also possible to set so that the protruding tip of each support pin is brought into contact with the diffusion plate from the stage before thermal expansion occurs.
- a cylindrical lens having an arc-shaped light exit surface is used as the condensing structure of the lens sheet, but the specific condensing structure can be changed as appropriate.
- a lens using a lens 30 having a triangular cross-sectional shape and a pair of light exit surfaces is also included in the present invention.
- a lens in which hemispherical lenses 31 are two-dimensionally arranged in parallel is also included in the present invention.
- a lens sheet using a cylindrical lens as a condensing structure has been shown.
- a microlens sheet having a microlens as a condensing structure can also be used.
- a diffusion sheet in which a large number of diffusion materials are installed on the surface of the substrate can be used.
- the type of optical member having a condensing structure can be changed as appropriate. Specifically, a lens sheet having a lenticular lens and a diffusion plate are laminated on the front and back, and an air layer is formed between the lens sheet and the diffusion plate corresponding to the light condensing region of the lenticular lens, and the lens is not condensed.
- An optical member having a configuration in which a reflective layer is arranged corresponding to the region can be used.
- a lens sheet having a light-collecting structure having anisotropy is shown.
- an optical sheet of a type in which the light-collecting structure has no anisotropy is shown.
- an optical sheet of a type in which the light condensing structure does not have anisotropy as shown in FIG. 25, two-dimensionally arranged hemispherical lenses and a large number of diffusing materials are installed on the surface of the substrate. The diffusion sheet formed is mentioned.
- the lens sheet having the light converging structure is used.
- 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 panel has been exemplified, but the present invention can also be applied to a display device using another type of display panel.
- the television receiver provided with the tuner is exemplified, but the present invention is also applicable to a display device that does not include the tuner.
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Abstract
Description
ところで、上記した特許文献1に記載されたものでは、下記の理由から拡散板の面内に分散配置した各支持ピンの高さを異ならせるようにしている。すなわち、冷陰極管を点灯または消灯するのに伴い、バックライト装置内の温度環境が変化すると、それに応じて拡散板には熱膨張または熱収縮が生じることになる。熱膨張時に拡散板は、各支持ピンによる支持位置を基点として波打つようにして局所的に変形し、輝度ムラが生じることが懸念されるため、上記特許文献1では、中央側の支持ピンを低く、端側の支持ピンを高くすることで、拡散板を全体として弓形に反らせるようにしており、それにより拡散板に局所的な変形を生じ難くしている。
本発明の照明装置は、光出射側へ開口するシャーシと、前記シャーシ内に収容されて複数並列して配される光源と、前記光源よりも光出射側に配されて前記シャーシの開口を覆う光学部材と、前記光学部材を光出射側とは反対側から支持可能とされ、少なくとも前記光源の並列方向に沿って複数並列して配される支持部材とを備え、前記支持部材は、前記光学部材に対する支持位置が中央側では前記光源に相対的に近く、端側では前記光源から相対的に遠くなるよう形成されているのに対し、前記光源は、その配列ピッチが中央側では相対的に狭く、端側では相対的に広くなるよう配されている。
(1)前記光源は、その配列ピッチが中央側から端側に向けて連続的に漸次広くなるよう配されている。このようにすれば、光学部材の面内において光源の分布密度をなだらかに変化させることができるので、輝度ムラの防止に一層好適となる。
本発明によれば、輝度ムラを防止できるとともに薄型化が可能となる。
本発明の実施形態1を図1から図14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。このうちY軸方向は、鉛直方向(垂直方向)と一致し、X軸方向は、水平方向と一致している。また、図2に示す上側を表側とし、図2に示す下側を裏側とする。
本発明の実施形態2を図15または図16によって説明する。この実施形態2では、支持部材20Aの配列形態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17または図18によって説明する。この実施形態3では、バックライト装置12Bの使用形態や冷陰極管18B及び支持部材20Bの配列形態など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19から図23によって説明する。この実施形態4では、光源をLED28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 (28)
- 光出射側へ開口するシャーシと、
前記シャーシ内に収容されて複数並列して配される光源と、
前記光源よりも光出射側に配されて前記シャーシの開口を覆う光学部材と、
前記光学部材を光出射側とは反対側から支持可能とされ、少なくとも前記光源の並列方向に沿って複数並列して配される支持部材とを備え、
前記支持部材は、前記光学部材に対する支持位置が中央側では前記光源に相対的に近く、端側では前記光源から相対的に遠くなるよう形成されているのに対し、前記光源は、その配列ピッチが中央側では相対的に狭く、端側では相対的に広くなるよう配されている照明装置。 - 前記光源は、その配列ピッチが中央側から端側に向けて連続的に漸次広くなるよう配されている請求の範囲第1項記載の照明装置。
- 前記支持部材は、前記光学部材に対する支持位置が中央側から端側に向けて連続的に漸次、前記光源から遠ざかるよう形成されている請求の範囲第1項または請求の範囲第2項記載の照明装置。
- 前記支持部材は、前記光学部材に対する支持位置を結ぶ線が略円弧状の曲線をなすよう形成されている請求の範囲第3項記載の照明装置。
- 前記支持部材は、前記光学部材に対する支持位置が隣り合う前記光源の間に配されるよう形成されている請求の範囲第1項から請求の範囲第4項のいずれか1項に記載の照明装置。
- 前記支持部材は、前記光学部材に対する支持位置が隣り合う前記光源の間の中央に配されるよう形成されている請求の範囲第5項記載の照明装置。
- 前記支持部材は、その配列ピッチが中央側では相対的に狭く、端側では相対的に広くなるよう配されている請求の範囲第1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。
- 前記光学部材は、複数積層して配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。
- 前記光学部材は、光を拡散させる拡散材を含有するとともに前記支持部材によって直接的に支持可能とされる拡散板と、前記拡散板に対して光出射側に積層される光学シートとから構成され、このうち前記光学シートには、少なくとも集光構造を持つものが含まれている請求の範囲第8項記載の照明装置。
- 前記集光構造は、集光に異方性を有している請求の範囲第9項記載の照明装置。
- 前記集光構造は、多数本並列配置されたシリンドリカルレンズからなる請求の範囲第10項記載の照明装置。
- 前記集光構造は、前記光学シートの面内に集光方向と、非集光方向とを有しており、
前記光学シートは、矩形状をなすとともにその長辺方向と前記集光方向とが一致し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。 - 前記集光構造は、前記光学シートの面内に集光方向と、非集光方向とを有しており、
前記光学シートは、矩形状をなすとともにその短辺方向と前記集光方向とが一致し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。 - 前記集光構造は、前記光学シートの面内に集光方向と、非集光方向とを有していて、前記集光方向が鉛直方向と一致し、前記非集光方向が水平方向と一致している請求の範囲第10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。
- 前記光源は、前記光学部材の面内において一方向に沿って延在する線状をなし、その軸方向と直交する方向に沿っ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14項のいずれか1項に記載の照明装置。
- 前記光学部材は、集光構造を有する光学シートを備え、前記集光構造が前記光学シートの面内に集光方向と非集光方向とを有しており、
前記光源の並列方向と、前記集光方向とが一致し、且つ前記光源の軸方向と、前記非集光方向とが一致している請求の範囲第15項記載の照明装置。 - 前記支持部材は、前記光源の並列方向に沿って複数並列するのに加え、前記光源の軸方向に沿って複数並列して配されており、
前記軸方向に沿って並列する前記支持部材は、前記光学部材に対する支持位置が中央側では相対的に光源に近く、端側では相対的に光源から遠くなるよう形成されている請求の範囲第15項または請求の範囲第16項記載の照明装置。 - 前記支持部材には、前記光源を保持可能な光源保持部が設けられている請求の範囲第15項から請求の範囲第17項のいずれか1項に記載の照明装置。
- 前記光源は、蛍光管とされる請求の範囲第15項から請求の範囲第18項のいずれか1項に記載の照明装置。
- 前記光源は、冷陰極管とされる請求の範囲第19項記載の照明装置。
- 前記光源は、前記光学部材の面内において点状をなしている請求の範囲第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、前記光学部材の面内において二次元的に複数並列するとともに、その配列ピッチが中央側では相対的に狭く、外周端側では相対的に広くなるよう配されている請求の範囲第21項記載の照明装置。
- 前記支持部材は、前記光学部材の面内において二次元的に複数並列して配されるとともに、前記光学部材に対する支持位置が中央側では相対的に前記光源に近く、外周端側では相対的に前記光源から遠くなるよう形成されている請求の範囲第22項記載の照明装置。
- 前記光源は、LEDとされる請求の範囲第21項から請求の範囲第23項のいずれか1項に記載の照明装置。
- 前記光学部材の外縁部を保持可能な保持部材が備えられている請求の範囲第1項から請求の範囲第24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25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26項記載の表示装置。
- 請求の範囲第26項または請求の範囲第27項に記載された表示装置を備えるテレビ受信装置。
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JP2010549348A JP5079889B2 (ja) | 2009-02-05 | 2009-11-17 | 照明装置、表示装置及びテレビ受信装置 |
CN2009801561388A CN102308141A (zh) | 2009-02-05 | 2009-11-17 | 照明装置、显示装置以及电视接收装置 |
BRPI0924627A BRPI0924627A2 (pt) | 2009-02-05 | 2009-11-17 | dispositivo de iluminação, dispositivo de vídeo e recptor de televisão. |
RU2011132660/07A RU2480668C2 (ru) | 2009-02-05 | 2009-11-17 | Устройство подсветки, устройство отображения и телевизионный приемник |
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- 2009-11-17 RU RU2011132660/07A patent/RU2480668C2/ru not_active IP Right Cessation
- 2009-11-17 US US13/147,417 patent/US8684583B2/en not_active Expired - Fee Related
- 2009-11-17 EP EP09839703A patent/EP2375125A4/en not_active Withdrawn
- 2009-11-17 CN CN2009801561388A patent/CN102308141A/zh active Pending
- 2009-11-17 BR BRPI0924627A patent/BRPI0924627A2/pt not_active IP Right Cessation
- 2009-11-17 WO PCT/JP2009/069469 patent/WO2010089929A1/ja active Application Filing
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Cited By (5)
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JP2014518441A (ja) * | 2011-07-01 | 2014-07-28 | コーニンクレッカ フィリップス エヌ ヴェ | モジュール式照明システムのための照明モジュール |
WO2013038802A1 (ja) * | 2011-09-13 | 2013-03-21 | シャープ株式会社 | 面発光装置およびそれを備えた液晶表示装置 |
WO2016143682A1 (ja) * | 2015-03-10 | 2016-09-15 | シャープ株式会社 | 照明装置、表示装置、及びテレビ受信装置 |
JPWO2016143682A1 (ja) * | 2015-03-10 | 2017-11-24 | シャープ株式会社 | 照明装置、表示装置、及びテレビ受信装置 |
US10184640B2 (en) | 2015-03-10 | 2019-01-22 | Sharp Kabushiki Kaisha | Lighting device, display device, and television device |
Also Published As
Publication number | Publication date |
---|---|
US8684583B2 (en) | 2014-04-01 |
CN102308141A (zh) | 2012-01-04 |
JPWO2010089929A1 (ja) | 2012-08-09 |
BRPI0924627A2 (pt) | 2016-03-01 |
EP2375125A4 (en) | 2012-06-20 |
US20110285923A1 (en) | 2011-11-24 |
RU2480668C2 (ru) | 2013-04-27 |
JP5079889B2 (ja) | 2012-11-21 |
EP2375125A1 (en) | 2011-10-12 |
RU2011132660A (ru) | 2013-03-10 |
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