WO2013088776A1 - Dispositif d'affichage et récepteur de télévision - Google Patents

Dispositif d'affichage et récepteur de télévision Download PDF

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Publication number
WO2013088776A1
WO2013088776A1 PCT/JP2012/069944 JP2012069944W WO2013088776A1 WO 2013088776 A1 WO2013088776 A1 WO 2013088776A1 JP 2012069944 W JP2012069944 W JP 2012069944W WO 2013088776 A1 WO2013088776 A1 WO 2013088776A1
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WO
WIPO (PCT)
Prior art keywords
light
guide plate
liquid crystal
display panel
emitting element
Prior art date
Application number
PCT/JP2012/069944
Other languages
English (en)
Japanese (ja)
Inventor
智之 市座
譲 生田
啓太 伊藤
Original Assignee
シャープ株式会社
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 シャープ株式会社 filed Critical シャープ株式会社
Publication of WO2013088776A1 publication Critical patent/WO2013088776A1/fr

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Classifications

    • 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • 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
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133512—Light shielding layers, e.g. black matrix
    • 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
    • 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/13332—Front frames
    • 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
    • G02F1/13356—Structural association of cells with optical devices, e.g. polarisers or reflectors characterised by the placement of the optical elements
    • G02F1/133562—Structural association of cells with optical devices, e.g. polarisers or reflectors characterised by the placement of the optical elements on the viewer side

Definitions

  • the present invention relates to a display device in which a light guide plate is arranged on the back side of a display panel, and a television receiver including the display device.
  • a liquid crystal display device provided with a liquid crystal panel as a display panel is thin and lightweight and consumes little power. Therefore, in recent years, liquid crystal display devices have been widely adopted as image display devices for television receivers, computers, and portable terminals.
  • the liquid crystal panel that is a component of the liquid crystal display device does not emit light by itself. Therefore, unlike a self-luminous display device such as a CRT (Cathode Ray Tube), the liquid crystal display device requires a light source unit on the surface.
  • a self-luminous display device such as a CRT (Cathode Ray Tube)
  • the liquid crystal display device requires a light source unit on the surface.
  • the edge light system is a system in which a light guide plate and a chassis that supports the light guide plate are arranged on the back side of the liquid crystal panel, and a light source is arranged on the side surface side of the light guide plate.
  • a plurality of edge light source light source units are juxtaposed so that the light source faces the side surface of the light guide plate, and light incident from the side surface of the light guide plate is emitted from one surface of the light guide plate while diffusing inside the light guide plate.
  • the edge light method has an advantage that the front and back thickness of the display device can be made thinner than the direct light method in which a plurality of light sources are juxtaposed on the back side of the liquid crystal panel because the light sources are juxtaposed on the periphery of the liquid crystal panel.
  • the edge light system a gap is provided between the side surface of the light guide plate and the light source in order to allow light from the light source to enter the light guide plate more efficiently. Therefore, the light emitted from the light source may enter the end of the liquid crystal panel other than the side surface of the light guide plate, and the light may be reflected in the display area of the liquid crystal panel.
  • the display device described in Patent Document 1 is provided with a light shielding member for blocking light leaking through a gap between the frame covering the light source and the light guide plate.
  • Patent Document 1 the structure described in Patent Document 1 is a case where the light source is a fluorescent lamp.
  • a display device that employs an LED (Light Emitting Diode) that is used as a light-emitting element and is further reduced in thickness cannot be applied because it has a different structure from the display device described in Patent Document 1.
  • LED Light Emitting Diode
  • the light guide plate is deformed by the heat generated by the light emitting element, and the light incident rate of the light emitting element is reduced, thereby lowering the luminance.
  • the present invention has been made in view of the circumstances as described above, and an object thereof is to provide a display device or the like that prevents direct light from entering a liquid crystal panel from a light emitting element. It is another object of the present invention to provide a display device or the like that suppresses the deformation of the light guide plate and prevents the luminance of the display panel from being lowered due to the decrease in the light incident rate from the light emitting element.
  • a display device illuminates the display panel by emitting light incident on a display panel that displays an image on the front side and light incident from a side surface that is disposed on the back side of the display panel and faces the light emitting element.
  • a display device including a light guide plate and a holding frame that holds a peripheral edge of the display panel, the holding frame has a surface parallel to a side surface of the light guide plate, and the light emitting element is mounted on the surface.
  • a mounting portion for mounting the heat dissipating body, and a front side holding portion connected to the mounting portion and having a surface parallel to the surface of the display panel, and the front side holding portion includes the display panel of the light guide plate.
  • the light-shielding part which protrudes toward the surface which touches and shields the light of the said light emitting element is formed.
  • the holding frame has a surface parallel to the side surface of the light guide plate, and a mounting portion on which the heat radiating body on which the light emitting element is mounted is mounted, and the mounting portion A front-side holding portion having a surface parallel to the surface of the display panel, the front-side holding portion protruding toward the surface of the light guide plate in contact with the display panel, and blocking light from the light emitting element.
  • the part is formed. Thereby, direct light from the light emitting element is shielded by the convex portion, and can be prevented from entering the liquid crystal panel.
  • the display device is characterized in that a light shielding member interposed between the light shielding portion and the light guide plate is provided.
  • the present invention by providing a light shielding member that is interposed between the light shielding portion and the light guide plate and fills the gap, direct light from the light emitting element is more reliably shielded and prevented from entering the liquid crystal panel. It becomes possible.
  • the light shielding member also has a function of a buffer member, and the light guide plate is suppressed by the light shielding portion with the light shielding member interposed therebetween, thereby suppressing deformation of the light guide plate. Accordingly, it is possible to prevent a decrease in the light incident rate from the light emitting element to the light guide plate, and to prevent a decrease in luminance of the display panel.
  • a television receiver includes the above-described display device and a tuner unit that receives a television broadcast, and displays an image related to the television broadcast received by the tuner unit on the display device. It is characterized by being.
  • the direct light from the light emitting element is blocked by the light blocking portion, and can be prevented from entering the liquid crystal panel.
  • the holding frame holding the peripheral edge of the display panel has a surface parallel to the side surface of the light guide plate, and the heat sink on which the light emitting element is mounted is mounted on the surface.
  • a mounting portion and a front side holding portion connected to the mounting portion and having a surface parallel to the surface of the display panel; the front side holding portion projects toward the surface of the light guide plate that contacts the display panel;
  • a light blocking portion for blocking the light of the light emitting element is formed.
  • FIG. 5 is a cross-sectional view taken along line VV in FIG. 4. It is the fragmentary perspective view of the light source module and heat spreader seen from the back side. It is a fragmentary perspective view of the heat spreader by which the light source module seen from the back side was mounted. It is the perspective view which looked at the whole holding frame from the left back side upper part.
  • FIG. 10 is a cross-sectional view taken along line XX in FIG. 9.
  • FIG. 10 is a cross-sectional view taken along line XX in FIG. 9.
  • It is the fragmentary perspective view which looked at the member back side of the lower part of the holding frame body in which the heat spreader is mounted from the left side.
  • It is a disassembled perspective view of the liquid crystal television in this Embodiment. It is sectional drawing of the principal part of the liquid crystal television in this Embodiment.
  • liquid crystal television including a display device (hereinafter referred to as “liquid crystal television”) is taken as an example.
  • FIG. 1 is a perspective view showing an appearance of a liquid crystal television in the present embodiment.
  • the liquid crystal television includes a liquid crystal panel 1 (display panel), a front cabinet 6, a rear cabinet 12, a stand 15, a tuner unit 16, an image processing unit 17, and a power supply control unit 18.
  • the liquid crystal panel 1 has a substantially rectangular parallelepiped shape and displays an image on the front side.
  • the front cabinet 6 is a rectangular frame and covers the periphery of the liquid crystal panel 1 from the front side.
  • the rear cabinet 12 covers the back side of the liquid crystal panel 1.
  • the stand 15 is for placing the liquid crystal television 1 on a flat surface such as a table.
  • the tuner unit 16 receives a television broadcast and extracts a broadcast signal.
  • the image processing unit 17 extracts image information from the broadcast signal. An image is displayed on the liquid crystal panel 1 based on the extracted image information.
  • the power control unit 18 supplies power of a predetermined voltage to each unit of the liquid crystal television.
  • the side on which the liquid crystal panel 1 of the liquid crystal television is provided is referred to as the front side.
  • the opposite side of the front side is called the back side.
  • the left and right sides of the liquid crystal panel 1 are referred to as the left side and the right side, respectively.
  • the upper and lower sides of the liquid crystal panel 1 are referred to as an upper side and a lower side, respectively.
  • FIG. 2 is a longitudinal sectional view showing a main part of the liquid crystal television.
  • the light guide plate 2 sandwiched between the lens system sheet group 7 from the front side and the light reflecting sheet 8 from the back side is disposed on the back side of the liquid crystal panel 1.
  • the light source module 3 in which the light emitting element 30 is mounted on the base substrate 31 is disposed to face the side surface in the longitudinal direction of the light guide plate 2.
  • the light source module 3 is fixed to a surface 41 parallel to the light guide plate 2 of the heat spreader 4. Further, the heat spreader 4 is fixed to a surface (mounting portion) parallel to the light guide plate 2 of the holding frame 5.
  • the liquid crystal panel 1, the heat spreader 4, and the like are sandwiched between the holding frame 5 on the front side of the liquid crystal panel 1 and the backlight chassis 9 on the back side of the liquid crystal panel 1, and are fixed to the front cabinet 6 with screws 61.
  • a light shielding portion that protrudes toward the light guide plate 2 is formed in a portion (front side holding portion) parallel to the surface of the display panel 1 of the holding frame body 5.
  • a light shielding member 14 is attached to the light shielding portion.
  • the light guide plate 2 is made of a synthetic resin such as acrylic resin, polycarbonate resin, methacrylic resin, or cyclic polyolefin, and is formed in a substantially rectangular shape.
  • the backlight chassis 9 is formed of a metal plate such as a steel plate in a substantially rectangular shape.
  • the backlight chassis 9 covers the liquid crystal panel 1, the light guide plate 2, the light source module 3 and the like from the back side of the liquid crystal television.
  • An elastic member 13 is provided at a portion where the holding frame 5 and the liquid crystal panel 1 are in contact with each other.
  • the elastic member 13 securely fixes the liquid crystal panel 1 and prevents the surface of the liquid crystal panel 1 from being damaged by the holding frame 5.
  • the front cabinet 6 covers the holding frame 5.
  • liquid crystal television configured as described above, light emitted from the light emitting element 30 enters from the side edge of the light guide plate 2. Since there is the light reflecting sheet 8 on the back side of the light guide plate 2, the light traveling in the back side direction of the light guide plate 2 is reflected by the light reflecting sheet 8. The light reflected by the light reflecting sheet 8 irradiates the liquid crystal panel 1 from the back side. The liquid crystal panel 1 is controlled, and an image is displayed on the front side of the liquid crystal panel 1.
  • FIG. 3 is a partial perspective view of the light source module 3 as viewed from the back side.
  • FIG. 4 is a partial perspective view of the heat spreader 4 as seen from the lower rear side.
  • FIG. 5 is a cross-sectional view taken along line VV in FIG.
  • FIG. 6 is a partial perspective view of the light source module 3 and the heat spreader 4 as seen from above.
  • FIG. 7 is a partial perspective view of the heat spreader 4 on which the light source module 3 is placed as seen from above.
  • FIG. 8 is a perspective view of the entire holding frame 5 as viewed from the upper left side.
  • the light source module 3 includes a plurality of light emitting elements 30, a strip-like base substrate 31 on which the light emitting elements 30 are mounted, and a connector 32.
  • the light emitting element 30 is an LED.
  • the light emitting elements 30 are juxtaposed along the longitudinal direction of the base substrate 31.
  • the light emitting element 30 is driven by a drive circuit (not shown) to emit light.
  • a drive current for the light emitting element 30 is supplied by a cable connected by a connector 32.
  • the connector 32 is fixed to one end of the base substrate 31.
  • the heat spreader 4 is a rod-shaped member as shown in FIG. 4 and has a substantially U-shaped cross section as shown in FIG.
  • the light source module 3 is placed on the upper portion 41 which is the upper side when attached as shown in FIG.
  • the upper portion 41 is provided with a screw hole 47.
  • the light source module 3 is fixed to the heat spreader 4 by passing the screw 330 through the screw hole 33 and the screw hole 47. In FIG. 7, screws are omitted.
  • the front portion 42 of the heat spreader 4 is continuous with the lower portion 43.
  • the lower portion 43 is discontinuous and is cut at several places. Between the cut
  • the coupling portion 44 is also formed at both end portions of the heat spreader 4.
  • the heat spreader 4 is fixed to the holding frame 5 by screws 61 passing through the screw holes 45 provided in the coupling portion 44.
  • the heat spreader 4 is made of a metal having high thermal conductivity, such as aluminum, and conducts and dissipates heat generated in the light emitting element 30.
  • One surface of the upper portion 41 of the heat spreader 4 is in contact with the light source module 3, and the other surface is in contact with the holding frame 5.
  • the heat of the heat spreader 4 is also conducted to the holding frame 5 and the backlight chassis 9, so that it can be efficiently dissipated.
  • each holding frame 5 is formed of a metal plate, for example, a steel plate.
  • the holding frame 5 has a rectangular frame shape in which a lower member 51, a left member 52, an upper member 53, and a right member 54 are coupled by screws.
  • the holding frame 5 holds the liquid crystal panel 1, the light guide plate 2, and the like.
  • FIG. 9 is a perspective view of the lower part of the member 51 constituting the holding frame 5 as viewed from the left side.
  • the lower side of FIG. 9 is the front side of the liquid crystal television.
  • 10A and 10B are sectional views taken along line XX in FIG.
  • FIG. 10A is a cross-sectional view of the heat spreader 4 before the light shielding member 14a and the reflection sheet 14b are attached.
  • FIG. 10B is a cross-sectional view when the light shielding member 14 a and the reflection sheet 14 b are attached to the heat spreader 4.
  • FIG. 11 is a partial perspective view of the rear side of the member 51 in the lower portion of the holding frame 5 on which the heat spreader 4 is placed as viewed from the left side.
  • the member 51 includes a plate-like portion 51a extending upward from the lower side parallel to the liquid crystal panel 1 serving as a mounting portion, and a plate-like portion 51b extending to the front side. Further, the member 51 includes a plate-like portion 51c that extends upward in a row, a mountain-shaped light-shielding portion 51d that protrudes toward the back side, that is, the surface of the light guide plate 2 that contacts the liquid crystal panel 1, and the upper portion. An extending plate-like portion 51e is provided. The member 51 includes a strip-shaped connecting portion 51g extending further upward from the plate-like portion 51e and a connecting portion 51f protruding to the back side at both ends in the left-right direction.
  • the plate-like portions 51 a and 51 b of the member 51 are portions in contact with the heat spreader 4.
  • the screw holes 51 h provided in the member 51 are holes through which screws for fixing the backlight chassis 9 and the heat spreader 4 to the member 51 pass.
  • connection part 51g of the member 51 is for connecting the member 51 and the other member 52 or 54 which comprises the holding frame 5 with a screw
  • the top of the light shielding part 51d is flat, and the light shielding member 14a and the reflection sheet 14b are attached to the flat part.
  • the light shielding part 51d and the light shielding member 14a, and the light shielding member 14a and the reflection sheet 14b are fixed with, for example, a double-sided tape or an adhesive.
  • the fixing method is not limited thereto, and any method may be used as long as the member 51 and the light shielding member 14a and the light shielding member 14a, the reflection sheet, and 14b can be reliably fixed.
  • the reflection sheet 14b is attached for the purpose of preventing light emitted from the light guide plate from being absorbed by the light shielding member 14a.
  • the light shielding member 14a is formed by forming a microcell polymer, urethane foam, rubber, silicon or the like into a sheet shape.
  • the liquid crystal television is assembled with the front side down.
  • the holding frame 5 is placed on the front cabinet 6.
  • the liquid crystal panel 1 is placed so that the outer edge portion of the liquid crystal panel 1 contacts the inner edge portion of the holding frame 5.
  • the lens system sheet group 7, the light guide plate 2, and the light reflection sheet 8 are placed on the liquid crystal panel 1.
  • the heat spreader 4 to which the light source module 3 is fixed is placed on a surface parallel to the side edge of the light guide plate 2 of the member 51 of the holding frame 5.
  • the backlight chassis 9 is mounted and fixed to the front cabinet 6 with screws 61.
  • the heat spreader 4 on which the holding frame 5 is placed is screwed in such a manner as to be sandwiched between the holding frame 5 and the backlight chassis 9.
  • the tuner unit 16, the image processing unit 17, and the power supply control unit 18 are fixed to the backlight chassis 9, the rear cabinet 12 is covered, and the front cabinet and screws are fixed.
  • FIG. 12 is an exploded perspective view of the liquid crystal television in the present embodiment.
  • a state in which the front cabinet 6, the holding frame 5, the heat spreader 4, and the backlight chassis 9 are fixed with screws 61 is shown.
  • a holding frame 5 is placed on the front cabinet 6.
  • the heat spreader 4 to which the light source module 3 is fixed is placed on the holding frame 5.
  • the backlight chassis 9 is fixed to the front cabinet 6 with the heat spreader 4 and the holding frame 5 interposed therebetween.
  • the tuner unit 16, the image processing unit 17, the power control unit 18, and the backlight chassis 9 are omitted.
  • FIG. 13 is a cross-sectional view of a main part of the liquid crystal television in this embodiment.
  • the light shielding member 14a and the reflection sheet 14b are fixed to the light shielding part 51d protruding from the front side of the member 51 toward the front side surface of the light guide plate 2 by the double-sided tape 14c.
  • the member 51 in the lower part of the holding frame 5 is provided with a plate-like part 51 b that is parallel to the side surface of the light guide plate 2 and protrudes to the back side.
  • a heat spreader 4 to which the light source module 3 is fixed is placed on the plate-like portion 51b.
  • the member 51 also includes a plate-like portion 51c that is continuous with the plate-like portion 51b and extends upward, and a light-shielding portion 51d that protrudes toward the surface of the light guide plate 2 that is in contact with the liquid crystal panel 1. Further, a light shielding member 14a and a reflection sheet 14b are attached to the light shielding part 51d.
  • the light shielding member 14a By attaching the light shielding member 14a to the light shielding portion 51d, it is possible to eliminate a gap between the light guide plate 2 and the member 51 due to design tolerances. By eliminating the gap, it is possible to prevent direct light from the light emitting element 30 mounted on the light source module 3 from entering the liquid crystal panel 1. Further, since the reflection sheet 14b is attached to the surface of the light shielding member 14a on the light guide plate 2 side, the light incident on the light guide plate 2 is not absorbed by the light shielding member 14a. Therefore, by providing the light shielding member 14a, it is possible to prevent the luminance of the liquid crystal panel 1 from being lowered.
  • the light source module 3 on which the light emitting element 30 is mounted is fixed to the heat spreader 4 formed of aluminum having high thermal conductivity as described above.
  • the heat spreader 4 is screwed so as to be in close contact with the holding frame 5 and the backlight chassis 9. Thereby, the heat generated in the light emitting element 30 is conducted to the heat spreader 4.
  • the heat conducted to the heat spreader 4 is further dissipated efficiently by being conducted to the holding frame 5 and the backlight chassis 9. Thereby, there is an effect of preventing damage to the light emitting element 30 itself and other components due to heat generated by the light emitting element 30.
  • a light shielding member 14a and a reflection sheet 14b are attached and sandwiched and fixed between the light shielding portion 51d and the backlight chassis 9.
  • the light incident rate of the light from the light emitting element 30 is lowered and the luminance of the liquid crystal panel 1 from being lowered.
  • the heat spreader 4 and the holding frame 5 are screwed, but not limited thereto, and may be fixed with an adhesive. Further, in order to increase the amount of heat conducted from the heat spreader 4 to the holding frame 5, a structure in which a heat conductive sheet formed of silicon, acrylic resin, carbon fiber or the like is interposed between the heat spreader 4 and the holding frame 5 is used. Also good. Furthermore, it is good also as a structure which interposes between a heat spreader 4 and the backlight chassis 9 for a heat conductive sheet.
  • the heat spreader 4 is made of aluminum.
  • the heat spreader 4 is not limited thereto, and any material having good heat conductivity may be used.
  • iron or stainless steel From the viewpoint of dissipating heat more efficiently, silver, copper, and the like are preferable, but aluminum, iron, or stainless steel is preferably used in consideration of cost, strength, and ease of processing.
  • the holding frame 5 and the backlight chassis 9 are made of steel plates, aluminum, iron, or stainless steel may be used in order to dissipate heat of the light emitting element 30 better.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)
  • Planar Illumination Modules (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Abstract

La présente invention porte sur un dispositif d'affichage qui comporte : un panneau d'affichage qui affiche des images sur le côté avant ; une plaque de guidage de lumière (2) qui est disposée dans le côté arrière du panneau d'affichage et qui expose le panneau d'affichage à un rayonnement par émission depuis une surface de la lumière incidente depuis la surface latérale opposée d'un élément électroluminescent (30) ; et un cadre de maintien (5) pour maintenir la périphérie du panneau d'affichage. Le cadre de maintien (5) comporte : une partie de montage qui a une surface parallèle à la surface latérale susmentionnée de la plaque de guidage de lumière (2) et a, monté sur ladite surface, un corps de dissipation de chaleur sur lequel l'élément électroluminescent (30) est monté ; et une partie de maintien avant qui est reliée à la partie de montage et a une surface parallèle à la surface avant du panneau d'affichage. Une partie de blocage de lumière (51d) est formée sur la partie de maintien avant et ladite partie de blocage de lumière (51d) fait saillie vers la surface de la plaque de guidage de lumière (2) en contact avec le panneau d'affichage et bloque une lumière provenant de l'élément électroluminescent (30).
PCT/JP2012/069944 2011-12-13 2012-08-06 Dispositif d'affichage et récepteur de télévision WO2013088776A1 (fr)

Applications Claiming Priority (2)

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JP2011272664A JP5427228B2 (ja) 2011-12-13 2011-12-13 表示装置、及びテレビジョン受像機
JP2011-272664 2011-12-13

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112610845A (zh) * 2020-12-15 2021-04-06 深圳创维－Rgb电子有限公司 一种升降机构及显示装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107092311B (zh) * 2017-04-27 2020-03-03 Oppo广东移动通信有限公司 显示屏、显示装置及移动终端

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001117097A (ja) * 1999-10-22 2001-04-27 Sharp Corp 液晶表示装置
JP2002091330A (ja) * 2000-09-14 2002-03-27 Toshiba Electronic Engineering Corp バックライトを備える平面表示装置
JP2007179875A (ja) * 2005-12-28 2007-07-12 Mitsubishi Electric Corp 面状光源装置及びこれを用いた表示装置
JP2009289597A (ja) * 2008-05-29 2009-12-10 Sharp Corp 光源装置および表示装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1742179A (zh) * 2003-01-29 2006-03-01 三菱丽阳株式会社 面光源装置
JP2006216244A (ja) * 2005-02-01 2006-08-17 Toshiba Matsushita Display Technology Co Ltd Ｌｅｄバックライト及び液晶表示装置
US8459857B2 (en) * 2010-04-26 2013-06-11 Mitsubishi Electric Corporation Planar light source device and display apparatus using the same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001117097A (ja) * 1999-10-22 2001-04-27 Sharp Corp 液晶表示装置
JP2002091330A (ja) * 2000-09-14 2002-03-27 Toshiba Electronic Engineering Corp バックライトを備える平面表示装置
JP2007179875A (ja) * 2005-12-28 2007-07-12 Mitsubishi Electric Corp 面状光源装置及びこれを用いた表示装置
JP2009289597A (ja) * 2008-05-29 2009-12-10 Sharp Corp 光源装置および表示装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112610845A (zh) * 2020-12-15 2021-04-06 深圳创维－Rgb电子有限公司 一种升降机构及显示装置

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JP5427228B2 (ja) 2014-02-26

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