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WO2013038977A1 - Dispositif d'éclairage, dispositif d'affichage et dispositif de réception de télévision - Google Patents

Dispositif d'éclairage, dispositif d'affichage et dispositif de réception de télévision Download PDF

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Publication number
WO2013038977A1
WO2013038977A1 PCT/JP2012/072695 JP2012072695W WO2013038977A1 WO 2013038977 A1 WO2013038977 A1 WO 2013038977A1 JP 2012072695 W JP2012072695 W JP 2012072695W WO 2013038977 A1 WO2013038977 A1 WO 2013038977A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
light source
guide plate
plate
disposed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2012/072695
Other languages
English (en)
Japanese (ja)
Inventor
信宏 笠井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sharp Corp
Original Assignee
Sharp Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sharp Corp filed Critical Sharp Corp
Publication of WO2013038977A1 publication Critical patent/WO2013038977A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—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
    • G02B6/0085—Means for removing heat created by the light source from the package
    • 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
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer
    • 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
    • G02F1/133608—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
    • G02F1/133628—Illuminating devices with cooling means

Definitions

  • the present invention relates to a lighting device, a display device, and a television receiver.
  • the 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.
  • a backlight device an edge light type backlight device in which a light incident surface is provided on a side surface of a light guide plate and a light source such as an LED is disposed on a side surface side of the light guide plate is known.
  • the end of the light guide plate may be warped due to heat or the like. When the warpage of the light guide plate end portion occurs, the distance between the light source and the light guide plate may change, and the optical characteristics of the backlight device may deteriorate.
  • Patent Document 1 discloses an edge light type backlight device in which warpage of an end portion of a light guide plate is prevented or suppressed.
  • This backlight device has a concave member that regulates the position of the light guide plate in the thickness direction by sandwiching the end portion of the light guide plate in the thickness direction.
  • a light source substrate on which a light source is mounted is disposed on the bottom surface of the concave portion of the concave member. According to this backlight device, the concave member restricts the position of the light guide plate in the thickness direction at the end of the light guide plate, so that warpage of the light guide plate end is prevented or suppressed.
  • An object of the technology disclosed in the present specification is to provide an illuminating device that can improve heat dissipation of a light source substrate while preventing or suppressing warpage of a light guide plate end.
  • the technology disclosed in this specification includes a chassis having at least a plate-shaped portion, a light incident surface provided on a side surface, a light guide plate disposed on one surface side of the plate-shaped portion, and the light incident surface.
  • the warp of the end portion of the light guide plate can be prevented or suppressed.
  • the cover portion covers a portion of the plate surface on which the light source of the light source substrate is disposed, where the light source is not disposed, the heat generated in the light source substrate is easily transmitted to the heat radiating member. For this reason, the heat dissipation of a light source board
  • substrate can be improved, preventing or suppressing the curvature of a light-guide plate edge part.
  • the covering portion may be in contact with a portion where the light source is not disposed on the one surface side of the light source substrate. According to this configuration, the contact area between the light source substrate and the heat radiating member can be increased as compared with the case where one surface of the light source substrate is not in contact with the heat radiating member (when covering with a slight gap). , Heat dissipation can be improved.
  • One of the surfaces of the light guide plate is a light exit surface
  • the reflection is provided on the opposite side of the light guide plate from the light exit surface, and has an extending portion extending toward the light source from the light entrance surface.
  • a sheet may be further provided, and the extension part of the reflection sheet may be laid on the clamping part. According to this structure, the extension part of a reflection sheet can be made hard to warp because the extension part of a reflection sheet is laid on a clamping part.
  • a reflective member may be disposed on a surface of the heat radiating member that is exposed to a space between the light source and the light incident surface. According to this configuration, the light emitted from the light source and directed in the direction deviating from the direction toward the light incident surface can be reflected to the light incident surface side by the reflecting member, so that the light emitted from the light source is incident. Light efficiency can be increased.
  • the chassis may include a side plate that rises from an edge of the plate-like portion, and a part of the heat dissipation member may be in contact with the side plate. According to this configuration, heat can be more easily transferred to the chassis than in the case where a part of the heat radiating member is not in contact with the side plate, so that the heat dissipation of the lighting device can be improved.
  • the light source may be a white light emitting diode. According to this configuration, the life of the light source can be extended and the power consumption can be reduced.
  • FIG. 1 is an exploded perspective view of a television receiver TV according to Embodiment 1.
  • FIG. An exploded perspective view of the liquid crystal display device 10 is shown.
  • a cross-sectional view of the liquid crystal display device 10 is shown.
  • FIG. 3 shows an enlarged cross-sectional view of the main part in the vicinity of one heat radiating member 36.
  • the principal part sectional drawing of the backlight apparatus 112 which concerns on Embodiment 2 is shown.
  • the principal part sectional drawing of the backlight apparatus 212 which concerns on Embodiment 3 is shown.
  • the principal part sectional drawing of the backlight apparatus 312 which concerns on Embodiment 4 is shown.
  • Embodiment 1 will be described with reference to the drawings.
  • a part of each drawing shows an X-axis, a Y-axis, and a Z-axis, and each axis direction is drawn in a common direction in each drawing.
  • the Y-axis direction coincides with the vertical direction
  • the X-axis direction coincides with the horizontal direction.
  • the vertical direction is used as a reference for upper and lower descriptions.
  • FIG. 2 is an exploded perspective view of the liquid crystal display device 10.
  • the upper side shown in FIG. 2 is the front side, and the lower side is the back side.
  • the liquid crystal display device 10 has a horizontally long rectangular shape as a whole, and includes a liquid crystal panel 16 as a display panel and a backlight device 24 as an external light source, and these form a bezel having a frame shape. 12 and the like are integrally held.
  • the liquid crystal panel 16 has a configuration in which a pair of transparent (highly translucent) glass substrates are bonded together with a predetermined gap therebetween, and a liquid crystal layer (not shown) is enclosed between the glass substrates. Is done.
  • 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.
  • FIG. 3 shows a cross-sectional view of a cross section of the liquid crystal display device 10 cut along the vertical direction (Y-axis direction).
  • the backlight device 24 includes a frame 14, an optical member 18, and a chassis 22.
  • the frame 16 has a frame shape, is disposed along the edge side of the surface of the light guide plate 20 (light output surface 20b), and supports the liquid crystal panel 16 along the inner edge.
  • the optical member 18 is placed on the front side of the light guide plate 20 (the light exit surface 20b side).
  • the chassis 22 has a substantially box shape opened to the front side (light emitting side, liquid crystal panel 11 side).
  • a pair of heat radiating members 36, 36, a pair of light emitting diode (LED) units 32, 32, the reflection sheet 26, and the light guide plate 20 are accommodated.
  • the pair of heat radiating members 36 and 36 are arranged extending in the long side direction of the chassis 22.
  • the configuration of the heat dissipation member 36 will be described in detail later.
  • the pair of LED units 32, 32 extend in the long side direction of the chassis 22, are arranged on the long side of the chassis 22 and inside the heat dissipation member 36, and are on the light incident surface 20 a side of the light guide plate 20. Light is emitted toward.
  • the longitudinal side surface (light incident surface) 20a of the light guide plate 20 is disposed at a position facing the LED units 32 and 32, and guides the light emitted from the LED unit 32 to the liquid crystal panel 16 side.
  • the optical member 18 is placed on the front side of the light guide plate 20.
  • the light guide plate 20 and the optical member 18 are arranged directly below the liquid crystal panel 16 and the LED unit 32 that is a light source is arranged at the side end of the light guide plate 20.
  • a so-called edge light system (side light system) is adopted.
  • the chassis 22 is made of, for example, a metal such as an aluminum-based material, and includes a bottom plate 22a having a rectangular shape in plan view, a side plate 22b rising from both outer edges of both long sides of the bottom plate 22a, and outer edges of both short sides of the bottom plate 22a. It consists of a side plate that rises.
  • a space facing the LED units 32, 32 in the chassis 22 is a housing space for the light guide plate 20.
  • the end of the bottom plate 22 a of the chassis 22 on the side where the LED light source 28 is disposed is recessed on the side opposite to the light exit surface 20 b of the light guide plate 20.
  • a step is provided on the bottom plate 22a of the chassis 22 between a portion facing the light guide plate 20 and a portion facing the bottom surface portion 36a (see FIG. 4) of the heat radiating member 36.
  • a power circuit board (not shown) for supplying power to the LED unit 32 is attached to the back side of the bottom plate 22a.
  • the optical member 18 is formed by laminating a diffusion sheet 18a, a lens sheet 18b, and a reflective polarizing plate 18c in order from the light guide plate 20 side.
  • the diffusion sheet 18a, the lens sheet 18b, and the reflective polarizing plate 18c have a function of converting light emitted from the LED unit 32 and passing through the light guide plate 20 into planar light.
  • the liquid crystal panel 16 is installed on the upper surface side of the reflective polarizing plate 18 c, and the optical member 18 is disposed between the light guide plate 20 and the liquid crystal panel 16.
  • the LED unit 32 has a configuration in which LED light sources 28 that emit white light are arranged in a row on the plate surface of the light guide plate 20 of the LED substrate 18 that faces the light incident surface 20a.
  • the LED substrate 30 is disposed in a state where the plate surface opposite to the plate surface on which the LED light source 28 is disposed is in contact with the contact portion 36 b of the heat radiating member 36.
  • the LED light source 28 may emit white light by applying a phosphor having a light emission peak in a yellow region to a blue light emitting element.
  • the blue light emitting element may emit white light by applying a phosphor having emission peaks in the green and red regions.
  • a phosphor having a light emission peak in a green region may be applied to a blue light emitting element, and white light may be emitted by combining a red light emitting element.
  • the LED light source 28 may emit white light by combining a blue light emitting element, a green light emitting element, and a red light emitting element.
  • a combination of an ultraviolet light emitting element and a phosphor may be used.
  • an ultraviolet light-emitting element may emit white light by applying a phosphor having emission peaks in blue, green, and red, respectively.
  • the reflection sheet 26 is made of synthetic resin, the surface thereof is white with excellent light reflectivity, and is placed on the front side of the bottom plate 22 a of the chassis 22.
  • the reflection sheet 26 has a reflection surface on the front side, and this reflection surface is in contact with the opposite plate surface 20c of the light guide plate 20, and leaks from the LED units 32 and 32 or the light guide plate 20 to the opposite plate surface 20c side. It is possible to reflect light.
  • the end of the reflection sheet 26 on the light incident surface 20a side slightly extends outward (the LED substrate 30 side) from the light incident surface 20a, and serves as an extended portion 26a.
  • the light guide plate 20 is a rectangular plate-like member, is formed of a highly transparent (highly transparent) resin such as acrylic, is in contact with the reflective sheet 26 and is supported by the chassis 22. Yes. 2 and 3, the light guide plate 20 is a plate opposite to the light output surface 20b, with the light output surface 20b being the main plate surface facing the diffusion sheet 18a between the pair of LED units 32 and 32.
  • the opposite plate surface 20c which is a surface, is arranged so as to face the reflection sheet 26 side.
  • FIG. 4 shows an enlarged cross-sectional view of the main part in the vicinity of one heat radiating member 36 in FIG.
  • the pair of heat radiating members 36 and 36 are members having heat radiating properties, and are arranged along the long side direction of the chassis 22.
  • the bottom surface portion 36a is disposed in contact with the bottom plate 22a along the bottom plate 22a of the chassis 22, and is attached to the bottom plate 22a by, for example, an adhesive tape and fixed to the bottom plate 22a.
  • the contact portion 36b rises perpendicularly to the bottom surface portion 36a from the bottom surface portion 36a toward the front side of the chassis 22, and has a plate shape in which the plate surface is parallel to the light incident surface 20a of the light guide plate 20. ing. And the contact part 36b is contact
  • the upper end of the contact portion 36b is located at the same height as the side surface located on the upper side in the long side direction of the LED substrate 30, and is parallel to the bottom surface portion 36a from the upper end of the contact portion 36b toward the light guide plate 20 side. An extending portion extending in the direction is provided.
  • the pair of cover portions 36c and 36c extend from the tip of the bottom surface portion 36a on the light guide plate 20 side and the upper end of the contact portion 36b, respectively.
  • One cover portion 36c extends from the front end of the bottom surface portion 36a on the light guide plate 20 side toward the front side of the chassis 22, and of the plate surface of the LED substrate 30 on which the LED light source 28 is disposed, is more than the LED light source 28.
  • the lower part (the part where the LED light source 28 is not disposed) is covered.
  • the other cover portion 36c extends from the upper end of the contact portion 36b toward the back side of the chassis 22 and is a portion of the LED board 30 on which the LED light source 28 is disposed above the LED light source 28 ( A portion where the LED light source 28 is not disposed).
  • the pair of sandwiching portions 36d and 36d extend perpendicularly to the light incident surface 20a from the tip of the cover portion 36c toward the light incident surface 20a side of the light guide plate 20, respectively. Both the sandwiching portions 36d, 36d extend until their tips come into contact with the light exit surface 20b and the opposite plate surface 20c at the end of the light guide plate 20 on the light incident surface 20a side. And the edge part by the side of the light-incidence surface 20a of the light-guide plate 20 is clamped by this clamping part 36d in the thickness direction. As a result, warping of the end portion of the light guide plate 20 on the light incident surface 20a side is prevented or suppressed by the sandwiching portion 36d.
  • the sandwiching portion 36d sandwiches the light guide plate 20 so that the distance between the LED light source 28 and the light incident surface 20a can be regulated.
  • the sandwiching portion 36d regulates the light guide plate 20 in the plate surface direction (XY plane direction) by a force for sandwiching the light guide plate 20 in the thickness direction.
  • the portion of the bottom surface portion 36 that faces the side surface in the long side direction of the LED substrate 30 and the extension portion that faces the side surface in the long side direction of the LED substrate 30 are the length of the LED substrate 30, respectively. It is in contact with the side surface in the side direction.
  • the extending portion 26a of the reflection sheet 26 is configured to be laid on the sandwiching portion 36d disposed on the lower side of the pair of sandwiching portions 36d and 36d.
  • the LED substrate 30 has a rectangular shape, and the portion of the heat radiating member 36 that is continuous with the contact portion 36b and the cover portion 36c is a side surface in the long side direction of the LED substrate 30. Abut. For this reason, the contact area of the LED board 30 and the heat radiating member 36 can be increased compared with the case where the side surface of the long side direction of the LED board 30 is not contact
  • the sandwiching portion 30d sandwiches the light guide plate 20 so that the distance between the LED light source 28 and the light incident surface 20a can be regulated. For this reason, even when the light guide plate 20 is thermally expanded, the distance between the LED light source 28 and the light incident surface 20a can be kept constant by the sandwiching portion 36d, and good optical characteristics can be maintained. it can.
  • one plate surface of the light guide plate 20 is a light exit surface 20b, and is laid on the opposite side to the light exit surface 20b of the light guide plate 20, and from the light entrance surface 20a.
  • the reflective sheet 26 further includes an extended portion 26a extending toward the LED light source 28, and the extended portion 26a of the reflective sheet 26 is laid on the sandwiching portion 36d. As described above, the extending portion 26a of the reflecting sheet 26 is laid on the sandwiching portion 36d, so that the extending portion 26a of the reflecting sheet 26 is unlikely to warp toward the sandwiching portion 36d.
  • FIG. 5 is a cross-sectional view of a main part of the backlight device 124 according to the second embodiment.
  • the second embodiment is different from the first embodiment in the configuration of the cover of the heat dissipating member. Since the other configuration is the same as that of the first embodiment, the description of the structure, operation, and effect is omitted.
  • the part obtained by adding the numeral 100 to the reference numeral in FIG. 4 is the same as the part described in the first embodiment.
  • the LED light source 128 of the LED substrate 130 is arranged on the inner surface (the surface facing the plate surface of the LED substrate 130) of the cover portion 136 c of the heat radiating member 136.
  • the plate surface (the plate surface facing the light incident surface 120a of the light guide plate 120) is in contact with a portion where the LED light source 128 is not disposed.
  • the backlight device according to the fourth embodiment there is no portion extending to the side plate 322b side (the side opposite to the light guide plate 320) of the chassis 322 in the bottom surface portion 336a as in the first embodiment. .
  • the back surface of the contact portion 336b (the surface opposite to the surface on which the LED substrate 330 is disposed) is in contact with the side plate 322b of the chassis 322.
  • the bottom plates 22a, 122a, 222a, and 322a are examples of “plate portions”.
  • the LED light sources 28, 128, 228, and 328 are examples of “light sources”.
  • the LED substrates 30, 130, 230, and 330 are examples of the “light source substrate”.
  • the backlight devices 24, 124, 224, and 324 are examples of “illumination devices”.
  • the liquid crystal display devices 10, 110, 210, and 310 are examples of the “display device”.
  • the configuration in which the reflective member is formed of sheet-like foamed PET is exemplified, but the configuration in which the reflective member is formed of an electrostatic multilayer film may be used.
  • the reflection member may be formed directly on the heat dissipation member. In this case, the reflection member may be formed by printing or vapor deposition on the heat dissipation member.
  • the television receiver provided with the tuner is exemplified, but the present invention can also be applied to a display device that does not include the tuner.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Planar Illumination Modules (AREA)

Abstract

L'invention porte sur un dispositif de rétro-éclairage (24), lequel dispositif comporte ce qui suit : un châssis (22) qui a une plaque inférieure (22a); une plaque de guidage de lumière (20) disposée sur le côté de surface avant de la plaque inférieure (22a), présentant des surfaces d'entrée de lumière (20a) disposées sur les côtés de ladite plaque de guidage de lumière; des sources de lumière à diodes électroluminescentes (28) faisant face auxdites surfaces d'entrée de lumière (20a); des substrats à diodes électroluminescentes (30), comportant des sources de lumière à diodes électroluminescentes (28) disposés sur les surfaces avant de ceux-ci; et des éléments de dissipation de chaleur (36), qui dissipent une chaleur provenant des substrats à diodes électroluminescentes (30). Chaque élément de dissipation de chaleur (36) comporte ce qui suit : une section de contact qui vient en contact avec la face inférieure de ce substrat à diodes électroluminescentes (30); des sections de revêtement (30b) qui s'étendent sur le côté de surface avant de ce substrat à diodes électroluminescentes (30) à partir des deux extrémités de la section de contact précédemment mentionnée et qui recouvrent les parties de la surface avant de ce substrat à diodes électroluminescentes (30) où ne se trouve pas la source de lumière à diodes électroluminescentes; et des sections de serrage qui s'étendent à partir des sections de revêtement (30b) et qui serrent les extrémités de la plaque de guidage de lumière (20) dans la direction de l'épaisseur de celle-ci.
PCT/JP2012/072695 2011-09-13 2012-09-06 Dispositif d'éclairage, dispositif d'affichage et dispositif de réception de télévision Ceased WO2013038977A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011-199161 2011-09-13
JP2011199161 2011-09-13

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Publication Number Publication Date
WO2013038977A1 true WO2013038977A1 (fr) 2013-03-21

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104315390A (zh) * 2014-11-11 2015-01-28 苏州通亮照明科技有限公司 照明装置
CN105334663A (zh) * 2015-11-16 2016-02-17 合一智能科技（深圳）有限公司 一种具有保护罩的侧入式背光模组
EP3293448A1 (fr) * 2016-09-13 2018-03-14 Self Electronics Co., Ltd. Lumières à barre de del ultra-minces

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JP2009004307A (ja) * 2007-06-25 2009-01-08 Toshiba Lighting & Technology Corp 導光板ユニット及び照明装置
WO2011067994A1 (fr) * 2009-12-03 2011-06-09 シャープ株式会社 Dispositif d'éclairage, dispositif d'affichage, et dispositif de réception de télévision

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009004307A (ja) * 2007-06-25 2009-01-08 Toshiba Lighting & Technology Corp 導光板ユニット及び照明装置
WO2011067994A1 (fr) * 2009-12-03 2011-06-09 シャープ株式会社 Dispositif d'éclairage, dispositif d'affichage, et dispositif de réception de télévision

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104315390A (zh) * 2014-11-11 2015-01-28 苏州通亮照明科技有限公司 照明装置
CN105334663A (zh) * 2015-11-16 2016-02-17 合一智能科技（深圳）有限公司 一种具有保护罩的侧入式背光模组
EP3293448A1 (fr) * 2016-09-13 2018-03-14 Self Electronics Co., Ltd. Lumières à barre de del ultra-minces

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