WO2012014601A1 - Appareil d'éclairage, appareil d'affichage, et appareil récepteur de télévision - Google Patents

Appareil d'éclairage, appareil d'affichage, et appareil récepteur de télévision Download PDF

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Publication number
WO2012014601A1
WO2012014601A1 PCT/JP2011/064063 JP2011064063W WO2012014601A1 WO 2012014601 A1 WO2012014601 A1 WO 2012014601A1 JP 2011064063 W JP2011064063 W JP 2011064063W WO 2012014601 A1 WO2012014601 A1 WO 2012014601A1
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WO
WIPO (PCT)
Prior art keywords
guide plate
light
frame portion
light guide
lighting device
Prior art date
Application number
PCT/JP2011/064063
Other languages
English (en)
Japanese (ja)
Inventor
達朗 黒田
Original Assignee
シャープ株式会社
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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 WO2012014601A1 publication Critical patent/WO2012014601A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133308—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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133314—Back 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133317—Intermediate frames, e.g. between backlight housing and front frame

Definitions

  • the present invention relates to a lighting device, a display device, and a television receiver.
  • liquid crystal display device requires a backlight device as a separate illumination device because the liquid crystal panel used for this does not emit light.
  • Patent Document 1 discloses an edge light type backlight device including a light guide plate, an LED substrate having an LED light source disposed on the surface thereof, a heat sink to which the LED substrate is attached, and a frame that supports the light guide plate and the LED substrate. Is disclosed. In this backlight device, since the LED substrate is supported by the frame in a state of being attached to the radiator, heat generated in the vicinity of the LED light source can be radiated by the radiator.
  • An object of the present invention is to provide a technique capable of increasing the strength of an illuminating device and preventing or suppressing vibration noise generated between members in an edge light type illuminating device.
  • the technology disclosed in this specification includes a light incident surface provided on a side surface, a light exit surface provided on one surface of a plate surface, and an opposite surface that is a surface opposite to the light exit surface.
  • a light guide plate, a light source substrate disposed opposite to the light incident surface of the light guide plate, a light source disposed on a surface opposite to the light incident surface of the light source substrate, and the opposite surface of the light guide plate A chassis portion having a bottom plate arranged on the side, and a portion that is attached to the bottom plate of the chassis portion and sandwiches the side end portion on the light incident surface side of the light guide plate in its thickness direction, And a frame member that supports the light source substrate, and a housing member that houses the light guide plate.
  • the frame portion supporting the light guide plate and the light source substrate is attached to the bottom plate of the chassis portion, so that the frame portion and the chassis portion are integrated to form a housing member.
  • strength of an illuminating device can be raised, Furthermore, the member and chassis part which support a light-guide plate and a light source substrate Vibration sound generated by rattling between the two can be prevented or suppressed.
  • the frame portion of the housing member can be used as a member for placing the panel member. For this reason, the intensity
  • the frame member may further include a bezel placed on the surface of the panel member, and the panel member may be sandwiched between the frame portion and the bezel. According to this configuration, the panel member can be fixed by being sandwiched between the frame portion and the bezel.
  • a circuit board electrically connected to the panel member may be attached to the surface of the frame portion exposed to the outside of the housing member. According to this configuration, the member for attaching the circuit board can be integrated with the housing member, and the strength of the lighting device can be further increased.
  • a seal member may be disposed between the circuit board and the surface of the frame portion. According to this configuration, the occurrence of electromagnetic interference by the circuit board can be prevented or suppressed by the seal member.
  • the circuit board may be attached to the surface of the frame portion via a first sheet member having heat dissipation. According to this configuration, the heat generated in the circuit board can be effectively radiated by the first sheet member.
  • the bezel may have an extension that extends until it comes into contact with a surface of the circuit board opposite to the side attached to the surface of the frame portion.
  • abutted with the surface on the opposite side to the side attached to the surface of the said frame part of the said circuit board may be provided. According to this configuration, the surface of the circuit board opposite to the side attached to the surface of the frame part can be pressed by the extension part or the contact member, and vibration caused by rattling between the frame part and the circuit board. Sound can be prevented or suppressed.
  • a grounding pattern is formed on the surface of the circuit board opposite to the side attached to the surface of the frame part, and the extension part or the contact member is in contact with the grounding pattern of the circuit board,
  • the bezel and the circuit board may be electrically connected via the extension or the contact member. According to this configuration, unnecessary radiation from the circuit board can be suppressed by electrically connecting the bezel and the ground pattern of the circuit board. For this reason, generation
  • a cooling mechanism may be provided on the surface of the frame portion in parallel with the circuit board. According to this configuration, the circuit board can be cooled by the cooling mechanism, and the heat dissipation effect of the circuit board can be enhanced.
  • the light source substrate may be attached to the surface of the frame portion via a second sheet member having heat dissipation properties. According to this configuration, the heat generated in the light source substrate can be effectively radiated by the second sheet member.
  • the frame portion may be formed of a metal material. According to this structure, the heat dissipation of a frame part can be improved.
  • the frame portion is provided with a through-hole penetrating the frame portion, inserted through the through-hole, supported by the frame portion, and further provided with a heat radiating member to which the light source substrate is attached. It may be made of a material. According to this configuration, the heat generated in the vicinity of the light source substrate can be effectively radiated to the outside of the frame portion via the heat radiating member. Furthermore, since it is possible to provide heat dissipation even if the frame portion is not made of metal by such a configuration, the frame portion can be formed of a resin material, and the cost and weight of the frame portion can be reduced. Can be achieved.
  • a fitting groove capable of fitting an end portion of the light source substrate is provided on a surface exposed to the light source substrate side of the frame portion, and an end portion of the light source substrate is fitted into the fitting groove, and the frame portion It may be supported by.
  • the light source substrate can be firmly supported on the frame portion as compared with the case where the light source substrate is screwed to the frame portion. Furthermore, since the components for attaching the light source substrate to the frame portion are not necessary, the number of components can be reduced.
  • a concave portion is provided in a range overlapping the frame portion of the light exit surface of the light guide plate, and a rib that can be fitted to the concave portion is provided at a position corresponding to the concave portion on the surface of the frame portion.
  • the light guide plate may be positioned in the planar direction by being fitted into the recess. According to this configuration, the light guide plate can be positioned in the planar direction by the frame portion.
  • the side plate of the chassis part is provided with a chassis side protruding part that protrudes to the side surface of the light guide plate, and can be brought into contact with the chassis side protruding part at a position corresponding to the chassis side protruding part of the side surface of the light guide plate.
  • the light guide plate side protrusion may be provided, and the light guide plate may be positioned in the planar direction by the light guide plate side protrusion contacting the chassis side protrusion. According to this configuration, the light guide plate can be positioned in the planar direction by the chassis portion.
  • a wiring groove capable of arranging a wiring may be provided on a surface exposed to the light source substrate side of the frame portion. According to this configuration, the member for housing the wiring for supplying power to the light source substrate can be integrated with the housing member, and the strength of the lighting device can be further increased.
  • the technology disclosed in this specification can also be expressed as a display device including a display panel that performs display using light from the above-described lighting device.
  • a display device in which the display panel is a liquid crystal panel using liquid crystal is also new and useful.
  • a television receiver provided with the above display device is also new and useful. According to the display device and the television set described above, the display area can be increased.
  • FIG. 1 is an exploded perspective view of a television receiver TV according to Embodiment 1.
  • FIG. An exploded perspective view of the liquid crystal display device 10 is shown.
  • a cross-sectional view of the liquid crystal display device 10 is shown.
  • the top view of the backlight apparatus 24 is shown.
  • a cross-sectional view of the backlight device 24 is shown.
  • the top view which expanded a part of rib 23a of the frame part 23 and the light emission surface 20b of the light-guide plate 20 is shown.
  • FIG. 3 shows a cross-sectional view of a liquid crystal display device 110 according to a second embodiment.
  • the front view of the source substrate 127 is shown.
  • FIG. 6 shows a cross-sectional view of a liquid crystal display device 210 according to Embodiment 3.
  • FIG. 6 shows a cross-sectional view of a liquid crystal display device 310 according to a fourth embodiment.
  • FIG. 6 shows a cross-sectional view of a liquid crystal display device 410 according to a fifth embodiment.
  • the top view of the thermal radiation member 440 and the LED unit 432 is shown.
  • FIG. 7 shows a cross-sectional view of a liquid crystal display device 510 according to a sixth embodiment.
  • a front view of a source substrate 527 is shown.
  • FIG. 9 shows a cross-sectional view of a liquid crystal display device 610 according to Embodiment 7.
  • FIG. 10 shows a cross-sectional view of a liquid crystal display device 710 according to an eighth embodiment.
  • a front view of a source substrate 727 is shown.
  • FIG. 10 shows a cross-sectional view of a liquid crystal display device 810 according to Embodiment 9.
  • FIG. 18 shows a cross-sectional view of a liquid crystal display device 910 according to Embodiment 10.
  • a front view of a source substrate 927 is shown.
  • Embodiment 1 will be described with reference to the drawings.
  • a part of each drawing shows an X-axis, a Y-axis, and a Z-axis, and each axis direction is drawn in a common direction in each drawing.
  • the Y-axis direction coincides with the vertical direction
  • the X-axis direction coincides with the horizontal direction.
  • FIG. 1 is an exploded perspective view of the television receiver TV according to the first embodiment.
  • the television receiver TV includes a liquid crystal display device 10, front and back cabinets Ca and Cb that are accommodated so as to sandwich the liquid crystal display device 10, a power source P, a tuner T, and a stand S. I have.
  • FIG. 2 is an exploded perspective view of the liquid crystal display device 10.
  • FIG. 3 shows a cross-sectional view of the liquid crystal display device 10 cut along the vertical direction (Y-axis direction).
  • the upper side of FIGS. 2 and 3 is the front side
  • the lower side is the back side.
  • the liquid crystal display device 10 has a horizontally long rectangular shape as a whole, and includes a liquid crystal panel 16 as a display panel and a backlight device 24 as an external light source, and these form a bezel having a frame shape. 12 and the like are integrally held.
  • the liquid crystal panel 16 has a configuration in which a pair of transparent (highly translucent) glass substrates are bonded together with a predetermined gap therebetween, and a liquid crystal layer (not shown) is sealed between the glass substrates. Is done.
  • One glass substrate is provided with a switching element (for example, TFT) connected to a source wiring and a gate wiring orthogonal to each other, a pixel electrode connected to the switching element, an alignment film, and the like.
  • the substrate is provided with a color filter and counter electrodes in which colored portions such as R (red), G (green), and B (blue) are arranged in a predetermined arrangement, and an alignment film.
  • image data and various control signals necessary for displaying an image are supplied to a source wiring, a gate wiring, a counter electrode, and the like from a drive circuit board (not shown).
  • a polarizing plate (not shown) is disposed outside both glass substrates.
  • the backlight device 24 includes a backlight chassis 50 and an optical member 18.
  • the backlight chassis 50 includes a chassis portion 22 and a frame portion 23, which are configured by being attached to each other so as to be integrated with each other, and having a substantially box shape opened to the front side (light emitting side, liquid crystal panel 16 side). Is made.
  • the optical member 18 is placed on the front side of the light guide plate 20 (the light exit surface 20b side).
  • the reflection sheet 26 and the light guide plate 20 are accommodated.
  • the longitudinal side surface (light incident surface) 20a of the light guide plate 20 is disposed at a position facing a later-described LED (Light ⁇ ⁇ ⁇ ⁇ Emitting Diode) unit 32, and guides light emitted from the LED unit 32 to the liquid crystal panel 16 side. .
  • the optical member 18 is placed on the front side of the light guide plate 20.
  • the light guide plate 20 and the optical member 18 are disposed directly below the liquid crystal panel 16 and the LED unit 32 that is a light source is disposed on the side end of the light guide plate 20.
  • a so-called edge light system (side light system) is adopted.
  • the chassis portion 22 of the backlight chassis 50 is made of a metal such as an aluminum-based material, for example, and includes a bottom plate 22a that has a rectangular shape in plan view, and a side plate 22b that rises to the front side from a peripheral edge in the short side direction of the bottom plate 22a. .
  • the bottom plate 22a has a thick portion 22a1 on the center side in the vertical direction (Y-axis direction), and a thin portion 22a2 on the side in the vertical direction (Y-axis direction) side that is thinner than the thick portion 22a1.
  • the side plate 22 b faces the side surface 20 d of the side surface of the light guide plate 20 that does not face the LED unit 32.
  • the frame portion 23 of the backlight chassis 50 is made of a metal such as an aluminum material, for example, and sandwiches the side end portion in the longitudinal direction of the light guide plate 20 (the side end portion on the light incident surface 20a side) in the thickness direction. It has a shape and extends along the longitudinal direction of the light guide plate 20. As shown in FIG. 3, a space S is formed between the side end of the sandwiched light guide plate 20 on the light incident surface 20 a side and the frame portion 23, and the LED unit 32 is accommodated in the space S. Has been. The LED unit 32 emits light toward the light incident surface 20 a of the light guide plate 20.
  • the frame portion 23 of the backlight chassis 50 is formed with an extending portion 23d extending from the lower side of the frame portion 23 and above the thin portion 22a2 of the chassis portion 22 so as to overlap the thin portion 22a2.
  • the extending portion 23 d is screwed and fixed to the thin portion 22 a 2 of the chassis portion 22 by the first screw 19.
  • the chassis part 22 and the frame part 23 are united, and the backlight chassis 50 is comprised. Therefore, the surface of the bottom portion of the backlight chassis 50 having a substantially box shape is constituted by the thick portion 22 a 1 of the chassis portion 22 and the extending portion 23 d of the frame portion 23.
  • a wiring groove 23b is formed in a portion of the extending portion 23d of the frame portion 23 that is exposed on the LED unit 32 side (space S side) along the direction in which the frame portion 23 extends (X-axis direction).
  • a wiring 21 for electrically connecting the LED unit 32 and a power supply board (not shown) to supply power to the LED unit 32 is accommodated in the wiring groove 23b.
  • the source substrate 27 is attached to the surface of the surface of the frame portion 23 located on the opposite side of the space S (outside of the frame portion 23).
  • the source substrate 27 is a circuit board for driving the liquid crystal panel 16 and is electrically connected to the liquid crystal panel 16. Note that an SOF (System OnlmFilm) and a driver (electronic component) (not shown) are attached to the upper end portion of the source substrate 27.
  • a panel placement surface 23c for placing the liquid crystal panel 16 is formed on the upper side of the frame portion 23 of the backlight chassis 50.
  • the periphery of the liquid crystal panel 16 is placed on the panel placement surface 23c via a panel pressing member 17 made of an elastic material such as rubber.
  • the bezel 12 is placed on the surface of the peripheral portion of the liquid crystal panel 16 via the panel pressing member 17. Therefore, the liquid crystal panel 16 has its peripheral edge sandwiched and fixed between the panel placement surface 23 c of the frame portion 23 and the bezel 12.
  • the bezel 12 is screwed to the upper surface of the frame portion 23 with a second screw 15 and fixed.
  • the reflection sheet 26 is mounted on the bottom surface of the backlight chassis 50 (the thick portion 22a1 of the chassis portion 22 and the extending portion 23d of the frame portion 23).
  • the reflection sheet 26 has a reflection surface on the front side, and this reflection surface is opposed to the back surface (opposite surface 20 c) of the light guide plate 20, and reflects light leaked from the LED units 32, 32 to reflect light. It plays a role of entering the opposite surface 20 c of the light guide plate 20.
  • the light guide plate 20 is a rectangular plate-like member, is formed of a resin having high translucency (high transparency) such as acrylic, and the side end portion in the longitudinal direction is sandwiched between the frame portions 23. It is supported by the backlight chassis 50.
  • the light guide plate 20 is disposed between the frame portion 23 and the side plate 22b of the chassis portion 22 so that the light output surface 20b as the main plate surface faces the diffusion sheet 18a.
  • the optical member 18 is formed by laminating a diffusion sheet 18a, a lens sheet 18b, and a reflective polarizing plate 18c in order from the light guide plate 20 side.
  • the diffusion sheet 18a, the lens sheet 18b, and the reflective polarizing plate 18c have a function of converting light emitted from the LED unit 32 and passing through the light guide plate 20 into planar light.
  • the liquid crystal panel 16 is installed on the upper surface side of the reflective polarizing plate 18 c, and the optical member 18 is disposed between the light guide plate 20 and the liquid crystal panel 16.
  • the LED unit 32 has a configuration in which LED light sources 28 that emit white light are arranged in a row on a resin-made rectangular LED board 30.
  • the LED substrate 30 is fixed to the frame portion 23 so as to face the light incident surface 20a of the light guide plate 20 by screwing or the like.
  • the LED light source 28 may emit white light by applying a phosphor having a light emission peak in a yellow region to a blue light emitting element.
  • the blue light emitting element may emit white light by applying a phosphor having emission peaks in the green and red regions.
  • a phosphor having a light emission peak in a green region may be applied to a blue light emitting element, and white light may be emitted by combining a red light emitting element.
  • the LED light source 28 may emit white light by combining a blue light emitting element, a green light emitting element, and a red light emitting element. Further, a combination of an ultraviolet light emitting element and a phosphor may be used. In particular, an ultraviolet light-emitting element may emit white light by applying a phosphor having emission peaks in blue, green, and red, respectively.
  • FIG. 4 shows a plan view of the backlight device 24.
  • FIG. 5 is a cross-sectional view of the backlight device 24 taken along the XZ plane, and shows a cross-sectional configuration taken along the line AA of FIG.
  • FIG. 6 shows a plan view in which a part of the rib 23a of the frame portion 23 and the light exit surface 20b of the light guide plate 20 are enlarged.
  • the side plate 22b of the chassis portion 22 is provided with four chassis side protruding portions 22c that protrude to the side surface side of the light guide plate 20, respectively.
  • the side plate 22b side of the chassis portion 22 is in contact with the side surface of the chassis side protruding portion 22c at the side end portion in the short side direction of the light guide plate 20 (side end portion not facing the frame portion 23).
  • Four light guide plate side protrusions 20f are provided respectively. Thereby, the light guide plate 20 is positioned in the plane direction (XY plane direction).
  • a recess 20 e is provided in a part of the light output surface 20 b of the light guide plate 20 in a range overlapping with the frame portion 23.
  • a part of the surface of the frame portion 23 corresponding to the recess 20e of the light guide plate 20 is provided with a rib 23a that protrudes toward the recess 20e and can be fitted to the recess 20e.
  • the ribs 23a of the frame portion 23 are engaged with the recesses 20e of the light guide plate 20, whereby the light guide plate 20 is positioned in the plane direction (XY plane direction).
  • the light guide plate 20 is positioned in the planar direction at the light guide plate side protruding portion 20f and the concave portion 20e.
  • the frame portion 23 supports the light guide plate 20 and the LED substrate 30, functions as a member for housing the wiring 21 connected to the liquid crystal panel 16, and the liquid crystal panel 16. It plays a role as a member for placing and a role as a member for placing the bezel 12.
  • the frame portion 23 is attached to the bottom plate 22 a of the chassis portion 22, and these are integrated to constitute the backlight chassis 50, which plays a role of accommodating the light guide plate 20 and the reflection sheet 26.
  • the strength of the backlight device 24 is sufficiently ensured as compared with the case where the members for performing the respective roles are provided separately.
  • the backlight chassis 50 is integrated. Since these members play the role, vibration noise caused by rattling between the members is also prevented or suppressed.
  • the frame portion 23 supporting the LED substrate 30 is attached to the bottom plate 22a of the chassis portion 22, so that the frame portion 23 and the chassis portion 22 are integrated.
  • a backlight chassis 50 is configured. For this reason, compared with the case where the member which supports the light-guide plate 20 and the LED board 30 is made into a different body from the chassis part 22, the intensity
  • the backlight device 24 includes the liquid crystal panel 16 placed on the surface of the frame portion 23 so as to face the light output surface 20 b of the light guide plate 20. Therefore, the frame portion 23 of the backlight chassis 50 can be used as a member for mounting the liquid crystal panel 16, and the member for mounting the liquid crystal panel 16 is separated from the backlight chassis 50. Compared with the case, the strength of the backlight device 24 can be increased. Further, vibration noise generated by rattling between the member for placing the liquid crystal panel 16 and the backlight chassis 50 can be prevented or suppressed.
  • the backlight device 24 has a frame shape, and includes a bezel 12 placed on the surface of the peripheral portion of the liquid crystal panel 16 via a panel pressing member 17. It is sandwiched between the frame portion 23 and the bezel 12. For this reason, the liquid crystal panel 16 can be fixed by the frame portion 23 and the bezel 12.
  • the source substrate 27 electrically connected to the liquid crystal panel 16 is attached to the surface of the frame portion 23 exposed to the outside of the backlight chassis 50.
  • substrate 27 can be integrated with the backlight chassis 50, and the intensity
  • the frame portion 23 is formed of a metal material. For this reason, the heat dissipation of the frame part 23 can be improved.
  • the concave portion 20e is provided in a range overlapping with the frame portion 23 of the light exit surface 20b of the light guide plate 20.
  • a rib 23a that can be fitted to the recess 20e is provided at a position corresponding to the recess 20e on the surface of the frame portion 23.
  • the light guide plate 20 is positioned in the plane direction by the rib 23a being fitted by the recessed part 20e. For this reason, the light guide plate 20 can be positioned in the plane direction by the frame portion 23.
  • the chassis-side protruding portion 22 c that protrudes to the side surface side of the light guide plate 20 is provided on the side plate 22 b of the chassis portion 22.
  • a light guide plate side protrusion 20f that can come into contact with the chassis side protrusion 22c is provided at a position corresponding to the chassis side protrusion 22c on the side surface of the light guide plate 20, and the light guide plate side protrusion 20f is the chassis side protrusion 22c.
  • the light guide plate 20 is positioned in the plane direction. For this reason, the light guide plate 20 can be positioned in the plane direction by the chassis portion 23.
  • a wiring groove 23b in which the wiring 21 can be arranged on the surface exposed to the LED substrate 30 side of the frame portion 23 is provided. For this reason, the wiring 21 for supplying electric power to the LED light source 28 can be accommodated in the wiring groove 23b.
  • FIG. 7 is an exploded perspective view of the liquid crystal display device 110 according to the second embodiment.
  • FIG. 8 shows a front view of the source substrate 127.
  • the second embodiment is different from the first embodiment in the manner of attaching the source substrate 127 attached to the outer surface of the frame portion 123. Since the other configuration is the same as that of the first embodiment, the description of the structure, operation, and effect is omitted.
  • the part obtained by adding the numeral 100 to the reference numeral in FIG. 3 is the same as the part described in the first embodiment.
  • the source substrate 127 is attached to the outer surface of the frame portion 123 via a seal member 125 made of an elastic body such as rubber.
  • the seal member 125 is attached to a seal member pattern 127 a provided on a part of the surface of the source substrate 127 on the side facing the frame portion 123.
  • the source substrate 127 is screwed to the outer surface of the frame portion 123 with a third screw 129.
  • the seal member 125 can prevent or suppress the occurrence of electromagnetic interference caused by the source substrate 127.
  • FIG. 9 is a cross-sectional view of the liquid crystal display device 210 according to the third embodiment cut along the vertical direction (Y-axis direction), and shows a diagram corresponding to FIG. 3 of the first embodiment.
  • the third embodiment is different from the first embodiment in the manner of attaching the source substrate 227 attached to the outer surface of the frame portion 223. Since the other configuration is the same as that of the first embodiment, the description of the structure, operation, and effect is omitted.
  • a part obtained by adding the numeral 200 to the reference numeral in FIG. 3 is the same as the part described in the first embodiment.
  • the source substrate 227 is attached to the outer surface of the frame portion 223 via the first heat dissipation sheet 225 having heat dissipation properties. For this reason, the heat generated in the source substrate 227 can be effectively radiated by the first heat radiation sheet 225.
  • FIG. 10 is a cross-sectional view of the liquid crystal display device 310 according to the fourth embodiment cut along the vertical direction (Y-axis direction), and shows a diagram corresponding to FIG. 3 of the first embodiment.
  • the fourth embodiment is different from the first embodiment in the manner of attaching the LED substrate 330 attached to the surface of the frame portion 323. Since the other configuration is the same as that of the first embodiment, the description of the structure, operation, and effect is omitted.
  • the part obtained by adding the numeral 300 to the reference sign in FIG. 3 is the same as the part described in the first embodiment.
  • the LED substrate 330 is attached to the surface of the frame portion 323 via the second heat dissipation sheet 325 having heat dissipation properties. For this reason, the heat generated in the LED substrate 330 can be effectively radiated by the second heat radiation sheet 325.
  • FIG. 11 is a cross-sectional view of the liquid crystal display device 410 according to the fifth embodiment cut along the vertical direction (Y-axis direction), and shows a diagram corresponding to FIG. 3 of the first embodiment.
  • FIG. 12 is a plan view of the heat dissipating member 440 and the LED unit 432 provided in the liquid crystal display device 410 according to the fifth embodiment.
  • the fifth embodiment is different from the first embodiment in the manner of attaching the LED unit 432 and the material constituting the frame portion 423. Since the other configuration is the same as that of the first embodiment, the description of the structure, operation, and effect is omitted.
  • FIG. 10 the part obtained by adding the numeral 400 to the reference numeral in FIG. 3 is the same as the part described in the first embodiment.
  • the LED substrate 430 is attached to a heat dissipation member 440 having heat dissipation.
  • the heat radiating member 440 includes a support part 440a and an insertion part 440b. As shown in FIG. 12, the support portion 440 a has a shape extending in the X-axis direction, and a part of the support portion 440 a is in contact with the LED substrate 430 to support the LED substrate 430.
  • the insertion portion 440b is attached to a part of the support portion 440a and extends downward from the support portion 440a.
  • a through hole 423 s is provided below the frame part 423, and the insertion part 440 b is inserted into the through hole 423 a and extends to the outside of the frame part 423 (the back side of the backlight chassis 50). For this reason, the heat generated in the vicinity of the LED substrate 430 is effectively radiated to the outside of the frame part 423 through the support part 440a and the insertion part 440b of the heat dissipation member 440.
  • the frame portion 423 is formed of a resin material. For this reason, cost reduction and weight reduction of the frame part 423 can be achieved. Note that even if the frame portion 423 is not made of metal, the heat radiating member 440 ensures heat dissipation, so the frame portion 423 can be formed of a resin material.
  • FIG. 13 is a sectional view of a liquid crystal display device 510 according to the sixth embodiment.
  • FIG. 14 shows a front view of the source substrate 527.
  • the shape of a part of the bezel 512 is different from that of the first embodiment. Since the other configuration is the same as that of the first embodiment, the description of the structure, operation, and effect is omitted.
  • the part obtained by adding the numeral 500 to the reference sign in FIG. 3 is the same as the part described in the first embodiment.
  • the bezel 512 has an extension portion 512 a extending from a part thereof toward the source substrate 527.
  • the extension portion 512a extends until it contacts the front surface of the source substrate 527 (the surface opposite to the surface attached to the frame portion 523), and presses the source substrate 527 from the front surface side. For this reason, in the liquid crystal display device 510, vibration noise caused by rattling between the frame portion 523 and the source substrate 527 can be prevented or suppressed by the extension portion 512a.
  • a ground pattern 533 is provided in front of the source substrate 527.
  • the extension part 512 a is in contact with the ground pattern 533 of the source substrate 527.
  • the bezel 512 is made of metal
  • the extension portion 512a of the bezel 512 is also made of metal. Therefore, the bezel 512 and the ground pattern 533 of the source substrate 527 are electrically connected via the extension portion 512a. Thereby, in the liquid crystal display device 510, unnecessary radiation from the source substrate 527 can be suppressed, and generation of electromagnetic interference by the source substrate 527 can be prevented or suppressed.
  • FIG. 15 is a sectional view of a liquid crystal display device 610 according to the seventh embodiment.
  • the seventh embodiment is different from the first embodiment in that a contact member 635 is provided between the bezel 612 and the source substrate 627. Since the other configuration is the same as that of the first embodiment, the description of the structure, operation, and effect is omitted.
  • the part obtained by adding the numeral 600 to the reference sign in FIG. 3 is the same as the part described in the first embodiment.
  • a contact member 635 is provided between the bezel 612 and the source substrate 627.
  • the contact member 635 is attached to the bezel 612, protrudes toward the source substrate 627, and contacts the surface of the source substrate 627.
  • the contact member 635 presses the source substrate 627 from the front side.
  • the contact member 635 is made of metal.
  • FIG. 16 is a sectional view of a liquid crystal display device 710 according to the eighth embodiment.
  • FIG. 17 shows a front view of the source substrate 727.
  • the seventh embodiment is different from the first embodiment in that cooling fins are provided on the surface of the frame portion 623 in parallel with the source substrate 727. Since the other configuration is the same as that of the first embodiment, the description of the structure, operation, and effect is omitted.
  • the part obtained by adding the number 700 to the reference numeral in FIG. 3 is the same as the part described in the first embodiment.
  • cooling fins 736 are provided on the surface of the frame portion 723 in parallel with the source substrate 727.
  • the cooling fins 736 extend in a plate shape from the surface of the frame portion 723 toward the bezel 712 side.
  • the cooling fins 736 have fins, and can cool the source substrate 737 in parallel with the cooling fins 736. Therefore, in the liquid crystal display device 710, the source substrate 727 can be cooled by the cooling fins 736, and the heat dissipation effect of the source substrate 727 can be enhanced.
  • FIG. 18 is a cross-sectional view of a liquid crystal display device 810 according to the ninth embodiment.
  • the ninth embodiment is different from the first embodiment in that fitting grooves 823e and 823f for fitting the LED board 830 into the frame portion 823 are formed. Since the other configuration is the same as that of the first embodiment, the description of the structure, operation, and effect is omitted.
  • a part obtained by adding the numeral 800 to the reference numeral in FIG. 3 is the same as the part described in the first embodiment.
  • fitting grooves 823e and 823f capable of fitting the upper and lower ends of the LED substrate 830 are formed on the surface of the frame portion 823 facing the upper and lower ends of the LED substrate 830, respectively. .
  • the upper and lower ends of the LED board 830 extend to positions where the LED boards 830 are fitted with the fitting grooves 823e and 823f, and are fitted into the fitting grooves 823e and 823f.
  • the LED substrate 830 is firmly supported by the frame portion 823.
  • components for attaching the LED substrate 830 to the frame portion 823 are not necessary, so that the number of components can be reduced.
  • FIG. 19 is a cross-sectional view of the liquid crystal display device 910 according to the tenth embodiment.
  • FIG. 20 shows a front view of the source substrate 927.
  • the tenth embodiment is different from the first embodiment in that an SOF (System On Film) 937 attached to the source substrate passes through the frame portion. Since the other configuration is the same as that of the first embodiment, the description of the structure, operation, and effect is omitted.
  • the part obtained by adding the numeral 900 to the reference numeral in FIG. 3 is the same as the part described in the first embodiment.
  • the SOF 937 attached to the upper end portion of the source substrate 927 passes through the frame portion 923 and is connected to the bezel 912.
  • the frame portion 923 is formed with a groove of about 1 mm to 5 mm through which the SOF 937 can penetrate, and the SOF 937 is disposed through the groove.
  • the driver 938 attached to the upper side of the SOF 937 is in contact with a metal bezel. For this reason, in the liquid crystal display device 910, the driver 938 is effectively dissipated.
  • the LED boards 30, 130, 230, 330, 430, 530, 630, 730, 830, and 930 are examples of the “light source board”.
  • LED light sources 28, 128, 228, 328, 428, 528, 628, 728, 828, 928 are examples of “light sources”.
  • the backlight chassis 50, 150, 250, 350, 450, 550, 650, 750, 850, 950 are examples of the “accommodating member”.
  • the backlight devices 24, 124, 224, 324, 424, 524, 624, 724, 824, and 924 are examples of the “illumination device”.
  • the liquid crystal panels 16, 116, 216, 316, 416, 516, 616, 716, 816, 916 are examples of the “panel member”.
  • the source substrates 27, 127, 227, 327, 427, 527, 627, 727, 827, and 927 are examples of the “circuit board”.
  • the first heat dissipation sheet 225 is an example of the “first sheet member”.
  • the second heat radiation sheet 325 is an example of a “second sheet member”.
  • an LED light source that is a planar light source is used as the light source.
  • a linear light source such as a discharge tube may be used as the light source.
  • a liquid crystal display device using a liquid crystal panel as an example of the display panel has been exemplified.
  • the present invention can also be applied to display devices using other types of display panels.
  • the television receiver provided with the tuner has been exemplified.
  • the present invention can also be applied to a display device that does not include the tuner.
  • TV TV receiver, Ca, Cb: cabinet, T: tuner, S: stand 10, 110, 210, 310, 410: liquid crystal display, 12, 112, 212, 312, 412: bezel, 16, 116, 216, 316, 416: Liquid crystal panel, 18, 118, 218, 318, 418: Optical member, 20, 120, 220, 320, 420: Light guide plate, 22, 122, 222, 322, 422, 522, 622, 722 , 822, 922: Chassis part, 23, 123, 223, 323, 423, 523, 623, 723, 823, 923: Frame part, 24, 124, 224, 324, 424, 524, 624, 724, 824, 924 : Backlight device, 26, 126, 226, 326, 426, 526, 626, 726, 826 926: Reflective sheet, 28, 128, 228, 328, 428, 528, 628, 728, 828, 928: LED light source,

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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)

Abstract

Le but de la présente invention est de faire en sorte que, dans un appareil d'éclairage de type lumière latérale, son intensité soit améliorée et l'apparition de bruits de mouvement soit limitée ou supprimée. L'invention concerne un appareil de rétro-éclairage (24) comprenant une plaque de guidage de lumière (20) comprenant : des surfaces d'incidence de lumière (20a) qui sont formées sur des parois latérales respectives de la plaque de guidage de lumière (20) ; une surface d'émergence de lumière (20b) qui est formée sur une des surfaces de plaque de la plaque de guidage de lumière (20) ; et une surface opposée (20c) qui est opposée à la surface d'émergence de lumière (20b). L'appareil de rétro-éclairage (24) comprend en outre : des cartes de DEL (30) qui sont opposées aux surfaces d'incidence de lumière respectives (20a) de la plaque de guidage de lumière (20) ; des sources de lumière à DEL (28) qui sont disposées sur les surfaces des cartes à DEL (30) opposées aux surfaces d'incidence de lumière respectives (20a) ; et un châssis de rétro-éclairage (50) qui est formé de manière à comprendre une partie de châssis (22) et une partie de cadre (23), et qui reçoit la plaque de guidage de lumière (20). La partie de châssis (22) comprend une plaque de fond (22a) disposée sur le côté de la surface opposée (20c) de la plaque de guidage de lumière (20). La partie de cadre (23) est un élément fixe par rapport à la plaque de fond (22a) de la partie de châssis (22) de manière à prendre en sandwich et à maintenir, dans le sens de l'épaisseur, les parties d'extrémité des surfaces d'incidence de lumière (20a) de la plaque de guidage de lumière (20), et supporte les cartes à DEL (30).
PCT/JP2011/064063 2010-07-29 2011-06-20 Appareil d'éclairage, appareil d'affichage, et appareil récepteur de télévision WO2012014601A1 (fr)

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CN107062006A (zh) * 2017-03-31 2017-08-18 东莞市闻誉实业有限公司 散热灯具
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WO2012093626A1 (fr) * 2011-01-07 2012-07-12 シャープ株式会社 Dispositif d'affichage
US20130148331A1 (en) * 2011-12-12 2013-06-13 Lg Innotek Co., Ltd. Illumination unit and display apparatus using the same
US9297513B2 (en) * 2011-12-12 2016-03-29 Lg Innotek Co., Ltd. Display apparatus having illumination unit with specific bracket
JP2013174705A (ja) * 2012-02-24 2013-09-05 Sharp Corp 表示装置、及びテレビ受信装置
JP2013195510A (ja) * 2012-03-16 2013-09-30 Sharp Corp 表示装置、及びテレビ受信装置
CN102707464B (zh) * 2012-05-28 2016-03-02 深圳市联祥瑞实业有限公司 具有电磁屏蔽功能的液晶板背光支架及液晶显示装置
CN102707464A (zh) * 2012-05-28 2012-10-03 深圳市联祥瑞实业有限公司 具有电磁屏蔽功能的液晶板背光支架及液晶显示装置
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JP2014134761A (ja) * 2013-01-14 2014-07-24 Samsung Display Co Ltd 表示装置
WO2014141882A1 (fr) * 2013-03-11 2014-09-18 シャープ株式会社 Appareil d'affichage et appareil récepteur de télévision
US10120221B2 (en) 2013-03-11 2018-11-06 Sharp Kabushiki Kaisha Display apparatus and television receiving apparatus
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CN103513456B (zh) * 2013-10-21 2017-09-29 Tcl光电科技(惠州)有限公司 显示模组及其前面板组件、显示模组的组装方法
CN103513456A (zh) * 2013-10-21 2014-01-15 Tcl光电科技(惠州)有限公司 显示模组及其前面板组件、显示模组的组装方法
CN103995384A (zh) * 2014-05-05 2014-08-20 青岛海信电器股份有限公司 一种液晶模组及显示装置
CN103995384B (zh) * 2014-05-05 2017-08-01 青岛海信电器股份有限公司 一种液晶模组及显示装置
JP2017103168A (ja) * 2015-12-04 2017-06-08 三菱電機株式会社 バックライトおよび表示装置
CN107062006A (zh) * 2017-03-31 2017-08-18 东莞市闻誉实业有限公司 散热灯具
CN107062006B (zh) * 2017-03-31 2019-06-04 东莞市闻誉实业有限公司 散热灯具
WO2021052051A1 (fr) * 2019-09-20 2021-03-25 京东方科技集团股份有限公司 Module à cristaux liquides et appareil d'affichage
US11428971B2 (en) 2019-09-20 2022-08-30 Beijing Boe Display Technology Co., Ltd. Liquid crystal module and display device

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