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WO2013088776A1 - Display device and television receiver - Google Patents

Display device and television receiver 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
Authority
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
French (fr)
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/en

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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

This display device is provided with: a display panel which displays images on the front side; a light-guide plate (2) which is disposed in back side of the display panel and which irradiates the display panel by emitting from one surface the light incident from the lateral surface opposite of a light-emitting element (30); and a holding frame (5) for holding the periphery of the display panel. The holding frame (5) is provided with: a mounting part which has a surface parallel to the aforementioned lateral surface of the light-guide plate (2) and has, mounted on said surface, a heat-dissipating body on which the light-emitting element (30) is mounted; and a front holding part which is connected to the mounting part and has a surface parallel to the front surface of the display panel. A light-blocking part (51d) is formed on the front holding part, and said light-blocking part (51d) protrudes towards the surface of the light-guide plate (2) in contact with the display panel and blocks light from the light-emitting element (30).

Description

表示装置、及びテレビジョン受像機Display device and television receiver
　本発明は表示パネルの裏側に導光板を配してある表示装置、及び該表示装置を備えたテレビジョン受像機に関する。 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.
　液晶パネルを表示パネルとして備える液晶表示装置は、薄形で軽量である上、消費電力が小さい。そのことから、近年、テレビジョン受像機、コンピュータ及び携帯端末用の画像表示装置として、液晶表示装置は広く採用されている。 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.
　液晶表示装置の構成部材である液晶パネルは、自ら発光しない。そのため、液晶表示装置は、ＣＲＴ（Ｃａｔｈｏｄｅ　Ｒａｙ　Ｔｕｂｅ）などの自発光型の表示装置とは異なり、面上の光源部を必要とする。 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.
　この光源部の一つの方式として、エッジライト方式がある。エッジライト方式は、液晶パネルの裏側に導光板及び導光板を支持するシャーシを配し、導光板の側面側に光源を配する方式である。 One type of light source unit is an edge light method. 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.
　一方、エッジライト方式の光源部は、光源が導光板の側面と対向するように複数並置され、導光板の側面から入光した光を、導光板内を拡散させながら導光板の一面から出光する。エッジライト方式では、光源を液晶パネルの周縁に並置するため、液晶パネルの裏側に光源が複数並置される直下ライト方式に比べて表示装置の表裏厚さを薄くすることができる利点がある。 On the other hand, 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.
　しかし、エッジライト方式において、光源の光をより効率的に導光板に入光させるために、導光板の側面と光源との間には空隙を設けている。そのため、光源が発する光が導光板側面以外の液晶パネルの端に入り込み、液晶パネルの表示領域に光が写り込んでしまう場合がある。 However, in 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.
　そのような問題に対して、特許文献１に記載された表示装置においては、光源を覆うフレームと導光板との隙間を通して漏れる光を阻止するための遮光部材を設けている。 For such a problem, 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.
特開２００１－１１７０９７号公報Japanese Patent Laid-Open No. 2001-117097
　しかしながら、特許文献１に記載の構造は、光源が蛍光ランプである場合のものである。近年、発光素子として用いられているＬＥＤ（Ｌｉｇｈｔ　Ｅｍｉｔｔｉｎｇ　Ｄｉｏｄｅ）を採用し、さらなる薄型化を図った表示装置においては、特許文献１に記載の表示装置とは構造が異なるため、適用できない。 However, the structure described in Patent Document 1 is a case where the light source is a fluorescent lamp. In recent years, 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.
　また、エッジライト方式においては、導光板が発光素子の発する熱により変形し、発光素子の入光率が低下することにより、輝度が下がるという問題もあった。 In the edge light system, 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.
　本発明は、上述のごとき事情に鑑みてなされたものであり、発光素子から直接光が液晶パネルに入ることを防いである表示装置等を提供することを目的とする。
　また、導光板の変形を抑え、発光素子から光の入光率の低下による表示パネルの輝度低下を防いだ表示装置等を提供することを目的とする。 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.
　本発明に係る表示装置は、表側に画像を表示する表示パネルと、該表示パネルの裏側に配され、発光素子と対向する側面から入光した光を一面から出光して前記表示パネルを照射する導光板と、前記表示パネルの周縁部を保持する保持枠体とを備える表示装置において、前記保持枠体は、前記導光板の側面に平行な面を持ち、該面に前記発光素子が実装された放熱体を載置する載置部、及び該載置部に連なり前記表示パネルの表面に平行な面を持つ表側保持部を有し、該表側保持部には、前記導光板の前記表示パネルと接する面に向かって突出し、前記発光素子の光を遮る遮光部が形成してあることを特徴とする。 A display device according to the present invention 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. In 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.
　本発明にあっては、前記保持枠体は、前記導光板の側面に平行な面を持ち、該面に前記発光素子が実装された放熱体を載置する載置部、及び該載置部に連なり前記表示パネルの表面に平行な面を持つ表側保持部を有し、該表側保持部には、前記導光板の前記表示パネルと接する面に向かって突出し、前記発光素子の光を遮る遮光部が形成してある。それにより、発光素子からの直接光は凸部により遮光され、液晶パネルに入ることを防ぐことが可能となる。 In the present invention, 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.
　本発明に係る表示装置は、前記遮光部及び前記導光板の間に介在する遮光部材を設けてあることを特徴とする。 The display device according to the present invention is characterized in that a light shielding member interposed between the light shielding portion and the light guide plate is provided.
　本発明にあっては、遮光部及び導光板の間に介在し、隙間を埋める遮光部材を設けてあることにより、発光素子からの直接光が、より確実に遮光され、液晶パネルに入ることを防ぐことが可能となる。
　また、遮光部材は緩衝部材の機能も備え、導光板は遮光部材を介在して遮光部により押さえられることにより、導光板の変形を抑える。それにより、発光素子から導光板への光の入光率の低下を防ぎ、表示パネルの輝度の低下を防ぐことが可能となる。 In 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.
　本発明に係るテレビジョン受像機は、上述の表示装置と、テレビジョン放送を受信するチューナ部とを備え、該チューナ部が受信したテレビジョン放送に係る画像を前記表示装置に表示するようにしてあることを特徴とする。 A television receiver according to the present invention 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.
　本発明にあっては、発光素子からの直接光は遮光部により遮光され、液晶パネルに入ることを防ぐことが可能となる。 In the present invention, 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.
　本発明によれば、表示パネルの周縁部を保持してある保持枠体は、前記導光板の側面に平行な面を持ち、該面に前記発光素子が実装された放熱体を載置する載置部、及び該載置部に連なり前記表示パネルの表面に平行な面を持つ表側保持部を有し、該表側保持部には、前記導光板の前記表示パネルと接する面に向かって突出し、前記発光素子の光を遮る遮光部が形成してある。それにより、発光素子からの直接光は遮光部により遮光され、液晶パネルに入ることを防ぐことが可能となる。 According to the present invention, 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. Thereby, the direct light from the light emitting element is shielded by the light shielding part, and can be prevented from entering the liquid crystal panel.
本実施の形態における液晶テレビの外観を示す斜視図である。It is a perspective view which shows the external appearance of the liquid crystal television in this Embodiment. 液晶テレビの要部を示す縦断面図である。It is a longitudinal cross-sectional view which shows the principal part of a liquid crystal television. 裏側上から見た光源モジュールの部分斜視図である。It is the fragmentary perspective view of the light source module seen from the back side. 裏側下から見たヒートスプレッタの部分斜視図である。It is a fragmentary perspective view of the heat spreader seen from the back side lower part. 図４のＶ－Ｖ線における断面図である。FIG. 5 is a cross-sectional view taken along line VV in FIG. 4. 裏側上から見た光源モジュール及びヒートスプレッタの部分斜視図である。It is the fragmentary perspective view of the light source module and heat spreader seen from the back side. 裏側上から見た光源モジュールが載置されたヒートスプレッタの部分斜視図である。It is a fragmentary perspective view of the heat spreader by which the light source module seen from the back side was mounted. 保持枠体全体を左裏側上方から見た斜視図である。It is the perspective view which looked at the whole holding frame from the left back side upper part. 保持枠体を構成する部材のうち下側部分の部材裏側を左側面から見た斜視図である。It is the perspective view which looked at the member back side of the lower part among members which constitute a maintenance frame from the left side. 図９のＸ－Ｘ線における断面図である。FIG. 10 is a cross-sectional view taken along line XX in FIG. 9. 図９のＸ－Ｘ線における断面図である。FIG. 10 is a cross-sectional view taken along line XX in FIG. 9. ヒートスプレッタが載置されている保持枠体の下側部分の部材裏側を左側面から見た部分斜視図である。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. 本実施の形態における液晶テレビの分解斜視図である。It is a disassembled perspective view of the liquid crystal television in this Embodiment. 本実施の形態における液晶テレビの要部の断面図である。It is sectional drawing of the principal part of the liquid crystal television in this Embodiment.
　以下、本発明をその実施の形態を示す図面に基づき具体的に説明する。ここでは、表示装置を備える液晶テレビジョン（以下、「液晶テレビ」と記す）を例とする。 Hereinafter, the present invention will be specifically described with reference to the drawings illustrating embodiments thereof. Here, a liquid crystal television including a display device (hereinafter referred to as “liquid crystal television”) is taken as an example.
　図１は本実施の形態における液晶テレビの外観を示す斜視図である。この液晶テレビは、液晶パネル１（表示パネル）、フロントキャビネット６、リアキャビネット１２、スタンド１５、チューナ部１６、画像処理部１７、電源制御部１８を含む。液晶パネル１は略直方体状をなし、表側に画像を表示する。フロントキャビネット６は矩形状の枠体であり、液晶パネル１の周縁を表側から覆っている。リアキャビネット１２は液晶パネル１の裏側を覆っている。スタンド１５は、液晶テレビ１をテーブル等の平面に立てて載置するためのものである。 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.
　チューナ部１６は、テレビジョン放送を受信し、放送信号を取り出す。画像処理部１７は、放送信号から画像情報を取り出す。取り出された画像情報を元に液晶パネル１に画像が表示される。電源制御部１８は、所定電圧の電力を液晶テレビの各部に供給する。 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.
　以下の説明においては、液晶テレビの液晶パネル１が設けられた側を表側と呼ぶこととする。表側の反対側を裏側と呼ぶこととする。液晶パネル１に向かって左右をそれぞれ左側、右側と呼ぶこととする。また、液晶パネル１に向かって上下をそれぞれ上側、下側と呼ぶこととする。
　また、液晶テレビの各構成要素の説明においては、各構成要素が組み付けられた状態での方向を記述する。 In the following description, 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. Further, the upper and lower sides of the liquid crystal panel 1 are referred to as an upper side and a lower side, respectively.
In the description of each component of the liquid crystal television, the direction in which each component is assembled is described.
　図２は液晶テレビの要部を示す縦断面図である。本実施の形態の液晶テレビは、液晶パネル１の裏側に、表側からレンズ系シート群７、裏側から光反射シート８で挟んだ導光板２を配している。導光板２の長手方向側面に対向して、ベース基板３１に発光素子３０が実装された光源モジュール３が配されている。光源モジュール３は、ヒートスプレッタ４の導光板２と平行な面４１に固定されている。さらに、ヒートスプレッタ４は、保持枠体５の導光板２と平行な面（載置部）に固定されている。液晶パネル１表側の保持枠体５と液晶パネル１等の裏側のバックライトシャーシ９とにより、液晶パネル１、ヒートスプレッタ４等は挟まれ、ネジ６１によりフロントキャビネット６に固定されている。保持枠体５の表示パネル１表面と平行な部分（表側保持部）には、導光板２に向かって突出する遮光部が形成されている。遮光部には遮光材１４が取り付けられている。 FIG. 2 is a longitudinal sectional view showing a main part of the liquid crystal television. In the liquid crystal television of the present embodiment, 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.
　導光板２はアクリル樹脂、ポリカーボネート樹脂、メタクリル樹脂、環状ポリオレフィン等の合成樹脂製であり、略直方形に形成されている。 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.
　バックライトシャーシ９は、金属板、例えば鋼板を略長方形状に形成してある。バックライトシャーシ９は、液晶テレビの裏側から、液晶パネル１、導光板２、光源モジュール３などを覆う。 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.
保持枠体５と液晶パネル１とが接触する部分には、弾性部材１３が設けられている。弾性部材１３は液晶パネル１を確実に固定すると共に、保持枠体５により液晶パネル１の表面が傷つくことを防止している。フロントキャビネット６は、保持枠体５を覆う。 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.
　以上のように構成された液晶テレビにおいて、発光素子３０が発した光は、導光板２の側縁から入る。導光板２の裏側には光反射シート８があるため、導光板２の裏側方向に進んだ光は光反射シート８に反射される。光反射シート８で反射した光が、液晶パネル１を裏側から照射する。液晶パネル１が制御され、液晶パネル１の表側に画像が表示される。 In the 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.
　図３は裏側上から見た光源モジュール３の部分斜視図である。図４は裏側下から見たヒートスプレッタ４の部分斜視図である。図５は図４のＶ－Ｖ線における断面図である。図６は裏側上から見た光源モジュール３及びヒートスプレッタ４の部分斜視図である。図７は裏側上から見た光源モジュール３が載置されたヒートスプレッタ４の部分斜視図である。図８は保持枠体５全体を左裏側上方から見た斜視図である。 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.
　光源モジュール３は、図３に示すように、複数の発光素子３０と、該発光素子３０を実装する短冊状のベース基板３１と、コネクタ３２を含む。発光素子３０はＬＥＤである。発光素子３０はベース基板３１の長手方向に沿って並置されている。発光素子３０は、駆動回路（図示しない）により駆動され、発光する。発光素子３０の駆動電流は、コネクタ３２にて接続されるケーブルにより供給される。コネクタ３２は、ベース基板３１の一端に固定されている。 As shown in FIG. 3, 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.
　ヒートスプレッタ４は、図４に示すように棒状の部材であり、図５に示すように断面が略コの字状である。図２のように取り付けられた場合に上側となる上側部分４１には、図７に示すように光源モジュール３が載置される。図６下側に示すように、上側部分４１にはネジ穴４７が設けられている。光源モジュール３は、ネジ穴３３及びネジ穴４７にネジ３３０を通すことにより、ヒートスプレッタ４に固定される。なお、図７においては、ネジを省略している。 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. As shown in FIG. 7, the light source module 3 is placed on the upper portion 41 which is the upper side when attached as shown in FIG. As shown in the lower side of FIG. 6, 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.
　図４に示すように、ヒートスプレッタ４の表側部分４２は下側部分４３と連なっている。下側部分４３は不連続であり、数箇所切断されている。切断されている下側部分４３の間には、表側部分４２と連続して下方向に伸びている板状の結合部４４が形成してある。結合部４４はヒートスプレッタ４の両端部にも形成されている。結合部４４に設けられたネジ穴４５を通るネジ６１により、ヒートスプレッタ４は保持枠体５に固定される。 As shown in FIG. 4, 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 | disconnected lower part 43, the plate-shaped coupling part 44 extended in the downward direction following the front side part 42 is formed. 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.
　ヒートスプレッタ４は、熱伝導率の高い金属、例えばアルミニウムにより形成され、発光素子３０に発生した熱を伝導し放散させる。ヒートスプレッタ４の上側部分４１の一面は、光源モジュール３と接し、他面は保持枠体５と接している。それにより、ヒートスプレッタ４の熱が、保持枠体５及びバックライトシャーシ９にも伝導するため、効率的に放散することが可能となる。 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. As a result, 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.
　図８に示すように、保持枠体５は、それぞれ金属板、例えば、鋼板により形成されている。保持枠体５は下側の部材５１、左側の部材５２、上側の部材５３、右側の部材５４をネジにより結合した、矩形枠状である。保持枠体５は、液晶パネル１、導光板２などを保持する。 As shown in FIG. 8, 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.
　図９は保持枠体５を構成する部材のうち下側部分の部材５１裏側を左側面から見た斜視図である。図９の下側が、液晶テレビの表側である。図１０Ａ、図１０Ｂは図９のＸ－Ｘ線における断面図である。図１０Ａは遮光部材１４ａ及び反射シート１４ｂを取り付ける前のヒートスプレッタ４の断面図である。図１０Ｂは遮光部材１４ａ及び反射シート１４ｂをヒートスプレッタ４に取り付けた場合の断面図である。図１１は、ヒートスプレッタ４が載置されている保持枠体５の下側部分の部材５１裏側を左側面から見た部分斜視図である。 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.
　部材５１は、載置部としての液晶パネル１と平行な下側から上側に伸びる板状部分５１ａ、それに連なり表側に伸びている板状部分５１ｂを備えている。さらに部材５１は、それに連なり上側に伸びている板状部分５１ｃ、それに連なり裏側、すなわち導光板２の液晶パネル１と接する面に向かって突出している山型形状の遮光部５１ｄ、それに連なり上側に伸びている板状部分５１ｅを備えている。部材５１は、左右方向の両端に、板状部分５１ｅから更に上側に伸びている短冊状の連結部５１ｇ及び、裏側に突出している連結部５１ｆを備えている。 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.
　部材５１の板状部分５１ａ、５１ｂがヒートスプレッタ４と接触する部分である。部材５１に設けられているネジ穴５１ｈは、部材５１にバックライトシャーシ９、ヒートスプレッタ４を固定するためのネジが通る穴である。 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.
　部材５１の連結部５１ｇは、部材５１と保持枠体５を構成する他の部材５２又は５４とをネジにより連結させるためのものである。 The 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 | thread.
　図１０Ｂに示すように、遮光部５１ｄの頂部は平らになっており、該平らな部分には、遮光部材１４ａ及び反射シート１４ｂが取り付けられている。遮光部５１ｄと遮光部材１４ａ、及び遮光部材１４ａと反射シート１４ｂとは、例えば、両面テープ、接着剤で固定する。固定方法は、それに限らず、部材５１と遮光部材１４ａ、及び遮光部材１４ａと反射シートと１４ｂとが、確実に固定できる方法であれば良い。
　反射シート１４ｂは、導光板から出光する光が遮光部材１４ａに吸収されないようにする目的で取り付けられている。 As shown in FIG. 10B, 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.
　遮光部材１４ａは、マイクロセルポリマー、ウレタンフォーム、ゴム、シリコンなどをシート状に形成したものである。 The light shielding member 14a is formed by forming a microcell polymer, urethane foam, rubber, silicon or the like into a sheet shape.
　次に、本実施の形態に係る液晶テレビの組み立て方法について、説明する。以下の説明において液晶テレビは表側を下にして組み立てている。
　まず、フロントキャビネット６に、保持枠体５を載せる。保持枠体５の内縁部分に、液晶パネル１の外縁部分が接触するように液晶パネル１を載せる。さらに液晶パネル１の上に、レンズ系シート群７、導光板２、光反射シート８を載せる。また、光源モジュール３を固定したヒートスプレッタ４を、保持枠体５の部材５１の導光板２の側縁と平行な面に載せる。さらに、バックライトシャーシ９を載せて、フロントキャビネット６にネジ６１で固定する。保持枠体５の載せられたヒートスプレッタ４は、保持枠体５及びバックライトシャーシ９に挟まれる形でネジ止めされる。
　チューナ部１６、画像処理部１７、電源制御部１８をバックライトシャーシ９に固定し、リアキャビネット１２を被せ、フロントキャビネットとネジで固定する。 Next, a method for assembling the liquid crystal television according to the present embodiment will be described. In the following description, the liquid crystal television is assembled with the front side down.
First, 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. Further, 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. Further, 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. Further, 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.
　図１２は本実施の形態における液晶テレビの分解斜視図である。フロントキャビネット６、保持枠体５、ヒートスプレッタ４、及びバックライトシャーシ９がネジ６１で固定される様子を示している。フロントキャビネット６には保持枠体５が載せられている。光源モジュール３が固定されたヒートスプレッタ４は、保持枠体５に載置される。バックライトシャーシ９は、ヒートスプレッタ４及び保持枠体５を挟んで、フロントキャビネット６と固定される。
　なお、チューナ部１６、画像処理部１７、電源制御部１８、及びバックライトシャーシ９は省略している。 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.
　図１３は本実施の形態における液晶テレビの要部の断面図である。
　上述したように、部材５１の表側から導光板２の表側の面に向かって突出している遮光部５１ｄには、遮光部材１４ａ及び反射シート１４ｂが両面テープ１４ｃにより固定されている。 FIG. 13 is a cross-sectional view of a main part of the liquid crystal television in this embodiment.
As described above, 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.
　以上のように構成された液晶テレビでは、保持枠体５の下側部分の部材５１は導光板２の側面と平行で裏側に突出する板状部分５１ｂを備えている。該板状部分５１ｂには光源モジュール３が固定されたヒートスプレッタ４が載置される。部材５１は、また、板状部分５１ｂと連なり上側に伸びている板状部分５１ｃ、それに連なり導光板２の液晶パネル１と接する面に向かって突出している遮光部５１ｄを備えている。さらに、遮光部５１ｄには、遮光部材１４ａ及び反射シート１４ｂが取り付けられている。 In the liquid crystal television configured as described above, 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.
　遮光部材１４ａを遮光部５１ｄに取り付けることにより、設計公差による導光板２と部材５１との隙間をなくすことが可能となる。隙間をなくすことにより、光源モジュール３に実装された発光素子３０からの直接光が、液晶パネル１に入り込むことを、防ぐことが可能となる。
　また、遮光部材１４ａの導光板２側の面には反射シート１４ｂを取り付けたことにより、導光板２に入光した光が遮光部材１４ａに吸収されることがない。そのため、遮光部材１４ａを設けたことにより、液晶パネル１の輝度を低下することを防ぐことが可能となる。 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.
　さらに、以上のように構成された液晶テレビでは、発光素子３０が実装された光源モジュール３は、上述したように熱伝導率の高いアルミニウムにて形成されたヒートスプレッタ４に固定されている。ヒートスプレッタ４は、保持枠体５及びバックライトシャーシ９と密着するようにネジ止めされている。これにより、発光素子３０にて発生した熱は、ヒートスプレッタ４に伝導する。ヒートスプレッタ４に伝導した熱は、さらに保持枠体５及びバックライトシャーシ９に伝導されることにより、効率的に放散される。それにより、発光素子３０が発した熱による、発光素子３０自身やその他の部品の損傷を防ぐという効果を奏する。 Furthermore, in the liquid crystal television configured as described above, 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.
　特に、導光板２については、遮光部材１４ａ及び反射シート１４ｂが取り付けられ遮光部５１ｄ並びにバックライトシャーシ９に挟み込まれて固定されている。発光素子３０の発した熱による導光板２の変形を抑えるため、発光素子３０からの光の入光率が低下し、液晶パネル１の輝度が低下することを防ぐことが可能となる。 Particularly, with respect to the light guide plate 2, 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. In order to suppress the deformation of the light guide plate 2 due to heat generated by the light emitting element 30, it is possible to prevent the light incident rate of the light from the light emitting element 30 from being lowered and the luminance of the liquid crystal panel 1 from being lowered.
　なお、ヒートスプレッタ４と保持枠体５とはネジ止めされるものとしたが、それに限らず、接着剤で固定しても良い。
　また、ヒートスプレッタ４から保持枠体５へ伝導する熱量を増やすために、シリコン、アクリル樹脂、カーボンファイバなどから形成された熱伝導性シートがヒートスプレッタ４と保持枠体５との間を介在する構造としても良い。さらにまた、熱伝導性シートをヒートスプレッタ４とバックライトシャーシ９との間を介在する構造としても良い。 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.
　上述の説明において、ヒートスプレッタ４はアルミニウム製としたが、それに限られず、熱伝導性の良い材質であれば良い。例えば、鉄又はステンレスである。より効率良く熱を放散する観点からは、銀や銅なども好ましいが、コスト、強度及び加工の容易さを考慮すると、アルミニウム、鉄、又はステンレスを用いることが好ましい。
　保持枠体５及びバックライトシャーシ９は鋼板より構成されるものとしたが、発光素子３０の熱をより良く放散させるために、アルミニウム、鉄、又はステンレスを用いても良い。 In the above description, the heat spreader 4 is made of aluminum. However, the heat spreader 4 is not limited thereto, and any material having good heat conductivity may be used. For example, 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.
Although 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.
　上述した実施の形態はすべての点で例示であって、制限的なものではないと考えられるべきである。本発明の範囲は、上述した意味ではなく、請求の範囲によって示され、請求の範囲と均等の意味及び範囲内でのすべての変更が含まれることが意図される。 It should be considered that the above-described embodiment is an example in all respects and is not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the meanings described above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.
　１　液晶パネル
　２　導光板
　３　光源モジュール
　３０　発光素子
　３１　ベース基板
　３２　コネクタ
　３３　ネジ穴
　４　ヒートスプレッタ
　５　保持枠体
　５１ａ、５１ｂ　板状部分（載置部）
　５１ｄ　遮光部
　６　フロントキャビネット
　９　バックライトシャーシ
　１２　リアキャビネット
　１４ａ　遮光部材
　１４ｂ　反射シート DESCRIPTION OF SYMBOLS 1 Liquid crystal panel 2 Light guide plate 3 Light source module 30 Light emitting element 31 Base board 32 Connector 33 Screw hole 4 Heat spreader 5 Holding frame 51a, 51b Plate-shaped part (mounting part)
51d Light-shielding part 6 Front cabinet 9 Backlight chassis 12 Rear cabinet 14a Light-shielding member 14b Reflective sheet

Claims (3)

  1. 　表側に画像を表示する表示パネルと、
    　該表示パネルの裏側に配され、発光素子と対向する側面から入光した光を一面から出光して前記表示パネルを照射する導光板と、
    　前記表示パネルの周縁部を保持する保持枠体と
    　を備える表示装置において、
    　前記保持枠体は、
    　　前記導光板の側面に平行な面を持ち、該面に前記発光素子が実装された放熱体を載置する載置部、及び該載置部に連なり前記表示パネルの表面に平行な面を持つ表側保持部を有し、
    　　該表側保持部には、前記導光板の前記表示パネルと接する面に向かって突出し、前記発光素子の光を遮る遮光部が形成してあること
    　を特徴とする表示装置。     A display panel that displays images on the front side;
    A light guide plate that is arranged on the back side of the display panel and emits light incident from a side surface facing the light emitting element to irradiate the display panel from one surface;
    In a display device comprising: a holding frame that holds a peripheral edge of the display panel;
    The holding frame is
    A surface having a surface parallel to the side surface of the light guide plate, a mounting portion on which the heat radiating body on which the light emitting element is mounted is mounted, and a surface parallel to the mounting portion and parallel to the surface of the display panel It has a front side holding part,
    The display device, wherein the front side holding portion is formed with a light shielding portion that protrudes toward a surface of the light guide plate that contacts the display panel and blocks light from the light emitting element.
  2. 　前記遮光部及び前記導光板の間に介在する遮光部材を設けてあること
    　を特徴とする請求項１に記載の表示装置。     The display device according to claim 1, further comprising a light shielding member interposed between the light shielding portion and the light guide plate.
  3. 　請求項１又は２に記載の表示装置と、
    　テレビジョン放送を受信するチューナ部と
    　を備え、
    　該チューナ部が受信したテレビジョン放送に係る画像を前記表示装置に表示するようにしてあること
    　を特徴とするテレビジョン受像機。     A display device according to claim 1 or 2,
    And a tuner for receiving television broadcasts,
    An image of a television broadcast received by the tuner unit is displayed on the display device.
PCT/JP2012/069944 2011-12-13 2012-08-06 Display device and television receiver WO2013088776A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011272664A JP5427228B2 (en) 2011-12-13 2011-12-13 Display device and television receiver
JP2011-272664 2011-12-13

Publications (1)

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WO2013088776A1 true WO2013088776A1 (en) 2013-06-20

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WO (1) WO2013088776A1 (en)

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JP2013125090A (en) 2013-06-24

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