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WO2012035896A1 - Plaque de guidage de lumière, dispositif d'éclairage, dispositif d'affichage à cristaux liquides et téléviseur - Google Patents

Plaque de guidage de lumière, dispositif d'éclairage, dispositif d'affichage à cristaux liquides et téléviseur Download PDF

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Publication number
WO2012035896A1
WO2012035896A1 PCT/JP2011/067305 JP2011067305W WO2012035896A1 WO 2012035896 A1 WO2012035896 A1 WO 2012035896A1 JP 2011067305 W JP2011067305 W JP 2011067305W WO 2012035896 A1 WO2012035896 A1 WO 2012035896A1
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WO
WIPO (PCT)
Prior art keywords
light guide
light
guide plate
support portion
liquid crystal
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/JP2011/067305
Other languages
English (en)
Japanese (ja)
Inventor
泰守 黒水
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 WO2012035896A1 publication Critical patent/WO2012035896A1/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
    • G02B6/0086—Positioning aspects
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/64—Constructional details of receivers, e.g. cabinets or dust covers
    • H04N5/655—Construction or mounting of chassis, e.g. for varying the elevation of the tube
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
    • G02B6/0043—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided on the surface of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • 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 light guide plate used to make the luminance distribution uniform, an illumination device using the light guide plate, a liquid crystal display device using the illumination device, and a television receiver using the liquid crystal display device. Related to the machine.
  • the liquid crystal display device includes an illumination device that emits light toward the liquid crystal display panel.
  • an illuminating device one using a light guide plate is known in order to irradiate a liquid crystal display panel with uniform light from a light source.
  • a cross section of a liquid crystal display device having such an illumination device is shown in FIG. 12 (hatching is omitted).
  • a liquid crystal display device 100 having a so-called edge light type illumination device shown in FIG. 12 has a light source 104 arranged on an inner surface of a backlight chassis 102 (accommodating member).
  • the light emitted from the light source 104 enters the light guide plate 106 from the side surface of the light guide plate 106 and is emitted from the light emission surface 1061 of the light guide plate 106 toward the liquid crystal display panel 108.
  • a reflection sheet 110 for effectively using light from the light source 104 is generally disposed between the light guide plate 106 and the bottom surface of the backlight chassis 102.
  • a diffuse reflection surface that diffuses light by diffusely reflecting light on the surface opposite to the light emission surface 1061 of the light guide plate 106. 1062 is formed.
  • the diffuse reflection surface 1062 is formed, for example, by printing white ink containing titanium dioxide or the like in a predetermined pattern 1063 (hereinafter, this pattern is referred to as a reflection pattern 1063) (see, for example, Patent Document 1). .
  • the conventional light guide plate 106 shown in FIG. 12 is configured to be mounted on the backlight chassis 102 as it is (via the reflective sheet 110). Therefore, when the light guide plate 106 moves due to vibration or the like, the diffuse reflection surface 1061 and the reflection sheet 110 (the backlight chassis 102 when the reflection sheet 110 is not disposed) are rubbed to form the diffusion reflection surface 1061. There is a problem that the reflection pattern 1063 is scraped off. Such a problem causes a reduction in display quality due to uneven brightness of an image displayed on the liquid crystal display panel 108.
  • Problems to be solved by the present invention include a light guide plate that can prevent damage to the reflection pattern on the diffuse reflection surface, an illumination device using this type of light guide plate, a liquid crystal display device using this illumination device, and this An object of the present invention is to provide a television receiver using a liquid crystal display device.
  • a light guide plate includes a diffusion reflection surface on which a reflection pattern for diffusing and reflecting light to be guided is formed, and a light guide section on which a light emission surface from which light is emitted is formed. And a support part protruding from the diffuse reflection surface.
  • the support portion only needs to be formed along at least a part of the peripheral edge of the light guide portion.
  • the support portion Should just be formed along the side edge which the said light guide part opposes.
  • the support portion may be formed at each corner of the light guide portion, and when the light guide portion is formed in a substantially rectangular shape in plan view, the support portion is the light guide portion. What is necessary is just to be formed in the four corners of a part.
  • an illumination device includes a light source, a light guide plate that guides light emitted from the light source, and a storage member that stores the light source and the light guide plate, and the light guide plate guides the light.
  • the gist of the invention is to have a support portion that supports the light portion.
  • the support portion has the light guide portion in a state in which a tapered tip is in contact with the optical sheet. It only has to be supported.
  • the shape viewed from the side of the support portion may be a substantially triangular shape or a substantially arc shape.
  • step difference was formed in the outer periphery of the said support part may be sufficient.
  • the optical sheet further includes an optical sheet disposed in the housing member so as to face the diffuse reflection surface of the light guide section, and the support section has the flat tip formed in contact with the optical sheet.
  • the light guide may be supported.
  • the support portion only needs to be formed along at least a part of the peripheral edge of the light guide portion.
  • the support portion is formed.
  • the part should just be formed along the side edge which the said light guide part opposes at least.
  • the support portion may be formed at each corner of the light guide portion, and when the light guide portion is formed in a substantially rectangular shape in plan view, the support portion is the light guide portion. What is necessary is just to be formed in the four corners of a part.
  • the gist of the liquid crystal display device according to the present invention is any one of the above-described illumination devices.
  • the gist of the television receiver according to the present invention is to have the above-mentioned liquid crystal display device.
  • the diffuse reflection surface may rub against other members (such as a reflection sheet). Absent. Therefore, it is possible to prevent damage to the reflection pattern formed on the diffuse reflection surface. Therefore, a liquid crystal display device or a television receiver can provide an image with excellent display quality without uneven brightness.
  • the light guide portion is formed along at least a part of the periphery of the light guide portion, the light guide portion is formed in a substantially rectangular shape in plan view, and at least along the opposing side edges of the light guide portion. If the support portion is formed, the light guide portion is reinforced by the support portion, and the light guide portion is hardly bent by heat. That is, the configuration is suitable when used in a high temperature environment.
  • the light guide part is formed in a substantially rectangular shape in plan view, and if the support parts are formed at the four corners of the light guide part, Since the size of the support portion can be reduced, the manufacturing cost of the light guide plate can be suppressed.
  • an optical sheet for example, a reflective sheet
  • the optical sheet can be prevented from being bent by heat.
  • the support portion and the optical sheet are in a (substantially) point contact or line contact state (a lot of the optical sheet is not pressed by the light guide plate)
  • the reflection sheet is planar in a high temperature environment. It can swell and is less likely to bend in the reflective sheet. Therefore, the configuration is suitable when used in a high temperature environment.
  • the apparatus can be reduced in size.
  • a liquid crystal display device or a television receiver
  • an optical sheet for example, a reflective sheet
  • the housing member so as to face the diffuse reflection surface
  • a support portion formed in a planar shape If the light guide unit is supported with the tip of the optical sheet in contact with the optical sheet, the support unit and the optical sheet are in surface contact, and the optical sheet is pressed by the light guide plate.
  • the optical sheet is difficult to move.
  • FIG. 1 is provided from the back, and shows the outline of the example in which the planar-view rectangular support part was formed in each corner of a light-guide part. It is the top view which looked at the light-guide plate with which the liquid crystal display device shown in FIG. 1 is provided from the back surface, and shows the outline of the example by which the planar-view circular support part was formed in each corner of a light guide part. It is the side view which looked at the light-guide plate with which the liquid crystal display device shown in FIG. 1 is provided from the side, and shows the outline of the example in which the side view substantially triangular support part was formed. It is the side view which looked at the light-guide plate with which the liquid crystal display device shown in FIG.
  • FIG. 1 is an exploded perspective view of a liquid crystal display device 1 according to an embodiment of the present invention (note that the shape of the support portion 252 shown in FIG. 1 is an example).
  • FIG. 2 is an enlarged sectional view of the liquid crystal display device 1 (hatching is omitted for the sake of clarity).
  • the front side and the upper side in the following description refer to the upper side in FIGS. 1 and 2, and the back side and the lower side refer to the lower side in FIGS. 1 and 2.
  • the liquid crystal display device 1 includes a liquid crystal display panel 10 and a lighting device 20.
  • a liquid crystal display panel 10 includes a thin film transistor (TFT) array substrate 12 (hereinafter simply referred to as an array substrate 12) and a color filter (CF) substrate 14, and includes a bezel 11 having a frame shape. It is fixed.
  • the array substrate 12 and the color filter substrate 14 face each other with a predetermined cell gap, and a liquid crystal is filled between the substrates.
  • the array substrate 12 is obtained by forming TFTs and pixel electrodes in a matrix on a glass substrate. Around these TFTs and pixel electrodes, gate signal lines and source signal lines are formed in a lattice pattern. Among these, the pixel electrode is electrically connected to the drain electrode of the TFT, the source signal line is electrically connected to the source electrode of the TFT, and the gate signal line is electrically connected to the gate electrode of the TFT.
  • the liquid crystal display panel 10 is usually provided with a substrate (source substrate or the like) for driving the panel or a driver IC (source driver or the like), but is omitted in FIG.
  • the color filter substrate 14 is formed by forming a plurality of color filters in a matrix on a glass substrate having the same size as the array substrate 12 and forming a transparent common electrode on almost the entire surface of the substrate.
  • the orientation of the liquid crystal filled between the two substrates is controlled by changing the voltage applied between the pixel electrode and the common electrode.
  • the illuminating device 20 (illuminating device according to one embodiment of the present invention) is a backlight device arranged on the back surface of the liquid crystal display panel 10.
  • the illuminating device 20 in this embodiment is an LED backlight using an LED light source 28 as a light source.
  • the LED light source 28 is arranged along two opposing side surfaces of the liquid crystal display panel 10 (along two opposing side surfaces of the backlight chassis 22). That is, the lighting device 20 is a so-called “edge light type” backlight.
  • the lighting device 20 includes a frame 21, a backlight chassis 22 (corresponding to a housing member in the present invention), a reflective sheet 24, and a light guide plate 25 (one embodiment of the present invention).
  • a light guide plate one embodiment of the present invention.
  • optical members 261, 262, 263, and an LED light source 28 are included in the lighting device 20.
  • the frame 21 is a substantially rectangular frame. A cross section of each side constituting the frame is formed in a substantially L shape.
  • the frame 21 is for holding the reflection sheet 24, the light guide plate 25, and the optical members 261, 262, and 263 laminated on the backlight chassis 22 inside the backlight chassis 22. That is, as shown in FIG. 2, the reflection sheet 24, the light guide plate 25, and the optical members 261, 262, and 263 are arranged in a space formed by the frame 21 and the backlight chassis 22.
  • the backlight chassis 22 is a substantially rectangular member in plan view having a shallow box shape made of, for example, aluminum or an aluminum alloy.
  • An LED light source 28 mounted on an LED substrate 281 is disposed on the inner surface of the backlight chassis 22. That is, the LED light source 28 emits light from the side of the backlight chassis 22 toward the center.
  • a reflection sheet 24 is laid on the inner bottom surface of the chassis body 22, and a light guide plate 25 is placed on the reflection sheet 24.
  • Optical members 261, 262, and 263 are placed on the light guide plate 25.
  • the reflection sheet 24 (corresponding to the optical sheet in the present invention) efficiently reflects the light emitted from the side of the backlight chassis 22 by the LED light source 28 toward the liquid crystal display panel 10 side.
  • the light guide plate 25 includes a light guide unit 251 that guides light emitted from the LED light source 28, and a support unit 252 that protrudes from the light guide unit 251 (a diffuse reflection surface 2511 described later) to the back side.
  • the light guide unit 251 spreads the light reflected by the reflection sheet 24 in a planar shape.
  • the light guide unit 251 is placed on the reflection sheet 24 (on the inner bottom surface of the backlight chassis 22) via the support unit 252. Details of the configuration of the light guide plate 25 (configuration of the support portion 252) will be described later.
  • the reflection sheet 24 and the light guide plate 25 improve the luminance of light reaching the panel surface of light (edge light) emitted from the LED light source 28 disposed along the side surface of the backlight chassis 22 (liquid crystal display panel 10).
  • the brightness in the surface direction of the panel is made uniform.
  • Optical members 261, 262, and 263 are thin sheet-like resin products having a rectangular shape in plan view.
  • the combination can be appropriately selected according to the characteristics required for the liquid crystal display device 1.
  • a combination of a diffusion sheet 261, a lens sheet 262, and a polarization reflection film 263 can be exemplified in order from the bottom.
  • the diffusion sheet 261 further uniformizes the luminance in the surface direction of the light reaching the liquid crystal display panel 10.
  • the lens sheet 262 collects the light transmitted through the diffusion sheet 261 and increases the luminance.
  • the polarization reflection film 263 is polarized in a predetermined direction (light polarized in a predetermined direction) so that the light reaching the liquid crystal display panel 10 is not absorbed by the polarizing plate attached to the light receiving surface (lower surface) of the liquid crystal panel 10. , And the other polarized light is reflected.
  • the LED light source 28 is disposed on two inner side surfaces of the backlight chassis 22 that face each other. Specifically, a plurality of LED substrates 281 are arranged on the inner surface of the backlight chassis 22, and a plurality of LED light sources 28 are mounted on each LED substrate 281 in a straight line along the longitudinal direction of the LED substrate 281. Has been.
  • the arrangement of the LED light sources 28 is not particularly limited, and may be arranged on each of the four inner surfaces of the backlight chassis 22.
  • the LED light source 28 is a so-called white LED that emits white light.
  • white LED white LED applicable to this embodiment is not limited to a specific thing.
  • a white LED formed by sealing an LED chip that emits blue light with a transparent resin mixed with a yellow phosphor can be used.
  • the light guide plate 25 includes the light guide part 251 that guides the light emitted from the LED light source 28 and the support part 252 that protrudes from the back surface of the light guide part 251.
  • the light guide portion 251 is a plate-like portion having a substantially rectangular shape in a plan view formed of, for example, an acrylic resin.
  • the LED light source 28 is disposed so as to face the side surface of the light guide unit 251.
  • a diffuse reflection surface 2511 is formed on the back surface (lower surface) of the light guide unit 251 to diffuse and diffuse the light incident on the light guide unit 251.
  • the diffuse reflection surface 2511 is formed with a reflection pattern 2513 for efficiently reflecting light toward the front side.
  • the reflective pattern 2513 is formed by printing white ink containing titanium dioxide or the like by an inkjet method.
  • the shape and configuration of the reflection pattern 2513 are not particularly limited.
  • a known reflection pattern 2513 formed in a planar manner on the light guide 251 can be appropriately applied.
  • the reflective pattern 2513 is drawn with an emphasis on the thickness in the cross-sectional views and side views (FIGS. 2 and 7 to 10) of the present application for easy understanding of the drawings. Further, the reflection pattern 2513 is omitted in the plan views (FIGS. 3 to 6) of the present application.
  • the opposite surface (front surface) of the diffuse reflection surface 2511 in the light guide unit 251 is a light emission surface 2512 from which the light uniformized in the planar direction by the reflection pattern 2513 is emitted.
  • the light emitted from the light emitting surface 2512 is irradiated from the back side (array substrate 12 side) of the liquid crystal display panel 10.
  • the support portion 252 is formed so as to protrude from the diffuse reflection surface 2511 of the light guide portion 251 (project toward the back side). By the support portion 252, the light guide portion 251 is supported at a distance from the bottom surface (reflective sheet 24) of the backlight chassis 22.
  • the protrusion height (protrusion length) of the support portion 252 is set such that a sufficient interval is maintained such that the diffuse reflection surface 2511 of the light guide portion 251 does not contact the reflection sheet 24.
  • the planar shape of the support portion 252 (the shape seen from the back side of the light guide plate 25) is along the opposing side edges (two sides) of the light guide portion 251 having a substantially rectangular shape in plan view, as shown in FIG. Is formed.
  • the support portion 252 is formed along the short side of the light guide portion 251, but may be formed along the long side. Moreover, as shown in FIG. 4, you may form along all the side edges (four sides) of the light guide part 251.
  • the light guide plate 25 is provided with the support portion 252 that protrudes from the diffuse reflection surface 2511 and supports the light guide portion 251 at a distance from the bottom surface (reflection sheet 24) of the backlight chassis 22. ing. Therefore, the diffuse reflection surface 2511 does not rub against the reflection sheet 24, and damage to the reflection pattern 2513 formed on the diffuse reflection surface 2511 can be prevented.
  • the support part 252 of the light guide plate 25 is formed along at least a part of the periphery of the light guide part 251, the support part 252 that supports the light guide part 251 is guided. It also serves as a reinforcing member that prevents the deformation of the light portion 251 and makes it difficult for the light guide portion 251 to be bent by heat. That is, the configuration is suitable when used in a high temperature environment.
  • the support portion 252 is preferably formed as much as possible inside.
  • the more the support portion 252 that is a reinforcing body is formed on the inner side the more the deflection of the light guide portion 251 near the center can be suppressed, and the deflection of the entire light guide portion 251 can be reduced. is there.
  • the position close to the reflection pattern 2513 on the diffuse reflection surface 2511 of the light guide unit 251 is most preferable.
  • FIG. 5 is a plan view of the light guide plate 25 according to this modification as seen from the back side.
  • the support portions 252 of the light guide plate 25 are formed at the four corners of the light guide portion 251 formed in a substantially rectangular shape in plan view.
  • the shapes of the support portions 252 formed at the four corners of the light guide portion 251 are substantially rectangular in plan view.
  • the support part 252 in each corner of the light guide part 251, since the light guide part 251 can be supported at intervals with the bottom face (reflective sheet 24) of the backlight chassis 22, The diffuse reflection surface 2511 does not rub against the reflection sheet 24, and damage to the reflection pattern 2513 formed on the diffuse reflection surface 2511 is prevented.
  • the support portions 252 are arranged at the respective corners as described above, the size of the support portions 252 can be reduced, so that the manufacturing cost of the light guide plate 25 can be suppressed.
  • each support portion 252 formed at the four corners of the light guide portion 251 may be a substantially rectangular shape in plan view as shown in FIG. 5, or a substantially circular shape in plan view as shown in FIG. It may be.
  • the support portion 252 is formed in a substantially triangular shape when viewed from the side. That is, the tip of the support portion 252 is tapered.
  • the support part 252 and the reflective sheet 24 will be in the state of a point contact or a line contact. For example, as shown in FIGS.
  • the contact portion 252 is in line contact (provided with a protrusion that is locally point contact). However, if it is the support part 252 formed in each corner of the light guide part 251, as shown in FIG.5 and FIG.6, it will be a point contact.
  • the configuration is suitable when used in a high temperature environment.
  • the shape viewed from the side of the support portion 252 is a substantially arc shape (dome shape when viewed three-dimensionally). With such a shape, breakage and deformation of the tapered support portion 252 are prevented.
  • it can also be set as the structure which formed the level
  • FIG. 2 it is possible to adopt a configuration in which the tip of the support portion 252 is formed in a flat shape and the light guide portion 251 is supported in a state where the flat tip is in contact with the reflection sheet 24. .
  • the support portion 252 and the reflection sheet 24 are in surface contact, and the reflection sheet 24 is pressed against the bottom surface of the backlight chassis 22 by the light guide plate 25.
  • the reflected sheet 24 thus made difficult to move.
  • a modification of the support portion 252 having a flat tip a configuration having a substantially trapezoidal shape in a side view as shown in FIG. 10 can be exemplified.
  • FIG. 11 is an exploded perspective view showing a schematic configuration of the television receiver 2 according to the embodiment of the present invention.
  • the television receiver 2 includes the liquid crystal display device 1, a tuner 41, a power source 42, a loudspeaker 43, cabinets 441 and 442, and a support member 45. Since the tuner 41, the loudspeaker 43, the power source 42, the cabinets 441 and 442, and the support member 45 can be those commonly used in the related art, they will be briefly described, and detailed description thereof will be omitted.
  • the tuner 41 generates an image signal and an audio signal of a predetermined channel from the received radio wave.
  • the tuner 41 may be a conventional general terrestrial tuner (analog terrestrial tuner, digital terrestrial tuner, or both) BS tuner, CS tuner, or the like.
  • the loudspeaker 43 emits sound based on the sound signal generated by the tuner 41. As this loudspeaker 43, a general speaker or the like can be applied.
  • the power source 42 can supply power to the liquid crystal display device 1, the tuner 41, the loudspeaker 43, and the like according to the embodiment of the present invention.
  • FIG. 11 shows a configuration in which the cabinet includes a front side cabinet 441 and a back side cabinet 442, and the display device 1, the tuner 41, the loudspeaker 43, and the power source 42 are housed between these cabinets.
  • the tuner 41, the loudspeaker 43, and the power source 42 may be assembled to the liquid crystal display device 1.
  • the reflection sheet 24 is disposed so as to face the diffuse reflection surface 2511 of the light guide plate 25, but other optical sheets may be used.
  • the present invention is more effective if it is an optical sheet that is easily bent by heat. Further, a configuration in which such an optical sheet is not disposed at all may be used.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)

Abstract

La présente invention concerne une plaque de guidage de lumière pouvant empêcher des dommages sur le modèle de réflexion sur une surface réfléchissante diffuse, un dispositif d'éclairage destiné à être utilisé dans ce type de plaque de guidage de lumière, un dispositif d'affichage à cristaux liquides destiné à être utilisé dans ledit dispositif d'éclairage, et un téléviseur destiné à être utilisé dans ledit dispositif d'affichage à cristaux liquides. La plaque de guidage de lumière (25) de la présente invention présente : une unité de guidage de lumière (251) pourvue d'une surface réfléchissante diffuse (2511) formant un modèle de réflexion (2513) pour réfléchir de manière diffuse la lumière guidée, et une surface électroluminescente (2512) étant destinée à émettre la lumière ; et une unité de support (252) qui fait saillie depuis la surface réfléchissante diffuse (2511). L'unité de support (252) supporte l'unité de guidage de lumière (251) et crée un espacement entre ladite unité de guidage de lumière (251) et un châssis de rétroéclairage (22) (une feuille réfléchissante (24)).
PCT/JP2011/067305 2010-09-15 2011-07-28 Plaque de guidage de lumière, dispositif d'éclairage, dispositif d'affichage à cristaux liquides et téléviseur Ceased WO2012035896A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010-206336 2010-09-15
JP2010206336 2010-09-15

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Publication Number Publication Date
WO2012035896A1 true WO2012035896A1 (fr) 2012-03-22

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PCT/JP2011/067305 Ceased WO2012035896A1 (fr) 2010-09-15 2011-07-28 Plaque de guidage de lumière, dispositif d'éclairage, dispositif d'affichage à cristaux liquides et téléviseur

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112012006940B4 (de) * 2012-09-26 2021-04-01 Shenzhen China Star Optoelectronics Technology Co., Ltd. Hintergrundbeleuchtungsmodul

Citations (6)

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JPS5953703U (ja) * 1982-09-30 1984-04-09 日本精機株式会社 照明装置
JPH06308489A (ja) * 1993-04-26 1994-11-04 Tosoh Corp パネル用バックライト
JPH0862430A (ja) * 1994-08-22 1996-03-08 Copal Co Ltd 面発光装置
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WO2007060776A1 (fr) * 2005-11-28 2007-05-31 Sharp Kabushiki Kaisha Dispositif de rétroéclairage et dispositif d’affichage à cristaux liquides l’utilisant
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