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WO2013047367A1 - Dispositif d'affichage et dispositif de réception de télévision - Google Patents

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

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Publication number
WO2013047367A1
WO2013047367A1 PCT/JP2012/074219 JP2012074219W WO2013047367A1 WO 2013047367 A1 WO2013047367 A1 WO 2013047367A1 JP 2012074219 W JP2012074219 W JP 2012074219W WO 2013047367 A1 WO2013047367 A1 WO 2013047367A1
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WO
WIPO (PCT)
Prior art keywords
light
liquid crystal
display device
optical member
crystal panel
Prior art date
Application number
PCT/JP2012/074219
Other languages
English (en)
Japanese (ja)
Inventor
健太郎 鎌田
敏之 明星
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 WO2013047367A1 publication Critical patent/WO2013047367A1/fr

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—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

Definitions

  • the present invention relates to a display device and a television receiver.
  • Liquid crystal panels are used in display devices such as televisions, mobile phones, and portable information terminals.
  • the liquid crystal panel needs to use external light in order to display an image. Therefore, as shown in Patent Document 1, this type of display device includes a liquid crystal panel and an illumination device (so-called backlight device) for supplying light to the liquid crystal panel.
  • This illuminating device is arranged on the back side of the liquid crystal panel, and is configured to irradiate the light spread in a planar shape toward the back side of the liquid crystal panel.
  • the liquid crystal panel is generally supported by a frame (see, for example, Patent Document 1).
  • This frame is made of a frame-shaped resin molded product, and the peripheral edge portion of the liquid crystal panel is supported by the inner edge portion thereof.
  • the liquid crystal panel is arranged on the front side of the lighting device described above while being supported by the frame.
  • An object of the present invention is to provide a display device in which display defects of a liquid crystal panel due to leaked light are suppressed, and a television receiver provided with the display device.
  • the display device is a plate-shaped member, and includes a light incident surface on which light is incident and is formed of at least one end surface of the plate-shaped member, and a plate surface on the front side of the plate-shaped member.
  • a light guide plate that emits light incident from a surface; a light source that emits light toward the light incident surface; and the light source is mounted on a front plate surface;
  • a light source substrate disposed so as to face the light incident surface with a predetermined distance therebetween, and a peripheral portion protruding outside the light incident surface so as to overlap the light guide plate
  • an end portion of the liquid crystal panel enters an inner side than the peripheral portion of the optical member.
  • the said light shielding layer is provided in the said peripheral part of the said optical member. Therefore, even if light is emitted from the light source, the light is blocked by the light shielding layer, and light is prevented from entering from the end of the liquid crystal panel.
  • the optical member may be formed of a laminate of a plurality of optical sheets, and the light shielding layer may be provided only on a part of the plurality of optical sheets forming the laminate.
  • the light-shielding layer may be provided on a liquid crystal panel that is disposed closest to the liquid crystal panel among the plurality of optical sheets forming the laminate.
  • the light shielding layer By providing the light shielding layer on the optical sheet disposed closest to the liquid crystal panel, the light shielding layer can be brought closer to the end of the liquid crystal panel. As a result, the light blocking layer prevents light from entering the end of the liquid crystal panel.
  • the light shielding layer may be formed on a back surface facing the light emitting surface side of the peripheral portion of the optical member. If the light shielding layer is formed on the back surface of the optical member facing the light emitting surface, the light is also prevented from entering the peripheral portion of the optical member.
  • the light shielding layer may be further provided on an end surface of the peripheral portion of the optical member.
  • the light shielding layer is provided on the end surface of the peripheral portion of the optical member, it is possible to prevent light from entering the optical member from the end surface.
  • the light shielding layer may be provided in the vicinity of the light source so as to correspond to an installation location of the light source.
  • the light shielding layer may be made of a light shielding tape.
  • the productivity of the light shielding layer is improved.
  • the light source may include a light emitting diode.
  • the display device may include a chassis disposed on a plate surface side on the back side of the light guide plate.
  • the frame may be configured to sandwich the light guide plate, the optical member, and the liquid crystal panel with the chassis.
  • a television receiver according to the present invention includes the display device.
  • the display apparatus with which the display defect of the liquid crystal panel resulting from leaked light was suppressed, and the television receiver provided with this display apparatus can be provided.
  • FIG. 1 is an exploded perspective view showing a schematic configuration of a television receiver according to Embodiment 1 of the present invention.
  • Rear view of TV receiver Partial sectional view showing a part of the sectional configuration along the short side direction of the liquid crystal display device
  • FIG. 9 is a partial cross-sectional view showing a part of a cross-sectional configuration along the short side direction of the liquid crystal display device according to the second embodiment.
  • FIG. 10 is a partial cross-sectional view showing a part of a cross-sectional configuration along the short side direction of the liquid crystal display device according to the third embodiment.
  • FIG. 9 is a partial cross-sectional view showing a part of a cross-sectional configuration along the short side direction of the liquid crystal display device according to the fourth embodiment.
  • FIG. 9 is a partial cross-sectional view showing a part of a cross-sectional configuration along the short side direction of the liquid crystal display device according to the fifth embodiment.
  • FIG. 7 is a plan view showing the main configuration of a liquid crystal display device according to Embodiment 6.
  • Embodiment 1 of the present invention will be described with reference to FIGS. 1 to 3.
  • the television receiver TV and the liquid crystal display device 10 are illustrated.
  • an X axis, a Y axis, and a Z axis are shown, and each axis direction is drawn to be a common direction in each drawing.
  • the upper side shown in FIG. 3 is the front side, and the lower side is the back side.
  • FIG. 1 is an exploded perspective view showing a schematic configuration of a television receiver TV according to Embodiment 1 of the present invention
  • FIG. 2 is a rear view of the television receiver TV.
  • the television receiver TV according to the present embodiment includes a liquid crystal display unit LDU, various substrates PWB, MB, CTB attached to the back side (back side) of the liquid crystal display unit LDU, and liquid crystal A cover member CV attached to cover the various substrates PWB, MB, CTB and a stand ST are provided on the back side of the display unit LDU.
  • the liquid crystal display unit LDU is supported by the stand ST so that its display surface is along the vertical direction (Y-axis direction).
  • the liquid crystal display device 10 is configured by removing at least a configuration for receiving a television signal (such as a tuner portion of the main board MB) from the television receiver TV having the above-described configuration.
  • the liquid crystal display unit LDU has a horizontally long rectangular shape as a whole, and includes a liquid crystal panel 11 that is a display panel and a backlight device (illumination device) 12 that is an external light source. It is the structure hold
  • two stand mounting members STA extending along the Y-axis direction are spaced apart in the X-axis direction. A pair is attached.
  • These stand attachment members STA have a substantially channel shape with a cross-sectional shape opened on the surface on the chassis 14 side, and a pair of support columns STb in the stand ST are inserted into a space held between the stand 14 and the chassis 14. It is configured.
  • the wiring member (electric wire etc.) connected to the LED board 18 which the backlight apparatus 12 has passes through the space in the stand attachment member STA.
  • the stand ST includes a pedestal portion STa that extends along the X-axis direction and the Z-axis direction, and a pair of support columns STb that rise from the pedestal portion STa along the Y-axis direction.
  • the cover member CV is made of synthetic resin, and is attached so as to cover the lower half (see FIG. 2) on the back surface of the chassis 14 while traversing the pair of stand attachment members STA in the X-axis direction. Between the cover member CV and the chassis 14, a space capable of accommodating components such as various substrates PWB, MB, and CTB described later is formed.
  • the various substrates PWB, MB, and CTB include a power supply substrate PWB, a main substrate MB, and a control substrate CTB.
  • the power supply substrate PWB is a power supply source of the liquid crystal display device 10 and supplies driving power to the other substrates MB and CTB, the LEDs 17 included in the backlight device 12, and the like.
  • the main board MB has a tuner section (not shown) that can receive a television signal and an image processing section (not shown) that performs image processing on the received television signal, and sends the processed image signal to the control board CTB. Output.
  • the main board MB receives an image signal from the image reproduction device when the liquid crystal display device 10 is connected to an external image reproduction device (not shown).
  • the processed signal is output to the control board CTB.
  • the control board CTB has a function of supplying an image signal input from the main board MB to the liquid crystal panel 11 as a liquid crystal driving signal.
  • FIG. 3 is a partial cross-sectional view showing a part of a cross-sectional configuration along the short side direction of the liquid crystal display device 10.
  • the liquid crystal display unit LDU constituting the liquid crystal display device 10 has main components of an outer frame (front frame) 13 arranged on the front side and a chassis (rear side) arranged on the back side. (Chassis) 14.
  • Main components sandwiched between the frame 13 and the chassis 14 include at least a liquid crystal panel 11, an optical member 15, a light guide plate 16, and an LED unit (light source unit) LU.
  • the liquid crystal panel 11, the optical member 15, and the light guide plate 16 are held in a state of being sandwiched by the front frame 13 and the back chassis 14 in a stacked state.
  • the backlight device 12 mainly includes an optical member 15, a light guide plate 16, an LED unit LU, and a chassis 14.
  • the LED unit LU is arranged between the frame 13 and the chassis 14 so as to be along the end surface on the long side of the light guide plate 16.
  • the LED unit LU includes an LED 17 that is a light source and an LED substrate (light source substrate) 18 on which the LED 17 is mounted.
  • the liquid crystal panel 11 has a horizontally long rectangular shape as a whole, and a pair of glass substrates excellent in translucency are bonded together with a predetermined gap therebetween, and liquid crystal is sealed between the two substrates.
  • One substrate array substrate
  • a switching element for example, TFT
  • a pixel electrode connected to the switching element
  • an alignment film for example, TFT
  • the other substrate color filter substrate, hereinafter referred to as CF substrate
  • CF substrate has a color filter (CF) or counter electrode in which colored portions such as R (red), G (green), and B (blue) are arranged in a predetermined arrangement, Furthermore, an alignment film or the like is provided.
  • the liquid crystal panel 11 is placed on the front side of the optical member 15 so as to be laminated, and the back surface (the outer surface of the polarizing plate on the back side) is in close contact with the optical member 15 with almost no gap. Thereby, it is possible to prevent dust and the like from entering between the liquid crystal panel 11 and the optical member 15.
  • the display surface 11a of the liquid crystal panel 11 includes an area where an image can be displayed on the center side of the screen and a non-display area having a frame shape (frame shape) surrounding the display area on the outer peripheral edge side of the screen. .
  • the liquid crystal panel 11 is connected to a control board CTB via a driver component for driving liquid crystal or a flexible board, and an image is displayed in a display area on the display surface 11a based on a signal input from the control board CTB. It has become so.
  • a polarizing plate is disposed on the outside of both substrates. Further, the end portion 11c of the liquid crystal panel 11 is disposed so as to overlap the optical member 15 in a state of entering an inner side of a peripheral portion 115 of the optical member 15 described later.
  • the optical member 15 has a horizontally long rectangular shape as a whole, like the liquid crystal panel 11.
  • the size (short side dimension and long side dimension) of the optical member 15 is set to be substantially the same as the front surface 16 a of the liquid crystal panel 11 and the light guide plate 16.
  • the optical member 15 is placed on the front side (light emitting side) of the light guide plate 16 in a stacked manner. Further, the optical member 15 is arranged in a state of being sandwiched between the liquid crystal panel 11 and the light guide plate 16.
  • the optical member 15 consists of a laminate of three optical sheets. Specifically, it consists of a laminate of a diffusion sheet 15a, a lens sheet 15b, and a reflective polarizing sheet 15c. As shown in FIG.
  • the diffusion sheet 15a is disposed on the lowermost side
  • the reflective polarizing sheet 15c is disposed on the uppermost side.
  • the optical sheet 15c disposed on the uppermost side among the optical sheets constituting the optical member 15 is set to a size such that the peripheral portion protrudes outside the light incident surface 16b of the light guide plate 16. Has been.
  • the light shielding layer 5 is formed in the peripheral part of the optical sheet 15c.
  • the light shielding layer 5 is provided in a portion 115 that protrudes outside the light incident surface 16a of the light guide plate 16 in the peripheral portion of the optical member.
  • the protruding portion 115 is disposed so as to cover the gap formed between the LED 17 and the light incident surface 16a from above (front side).
  • the protruding portion 115 has a size and the like so that it does not come into contact with the LED unit LU and the frame 13 even when the optical member 15 is thermally expanded.
  • the light shielding layer 5 is provided on the back surface side of the protruding portion 115.
  • the light blocking layer 5 is black and has a property of absorbing and blocking light emitted from the LED 17.
  • the light-shielding layer 5 for example, a black paint film made of a black paint film (applied product) or a black tape (light-shielding tape) having an adhesive layer on one side is used.
  • the light shielding layer 5 of this embodiment consists of a black light shielding tape provided with an adhesive layer on one side. It is preferable to use a light shielding tape as the light shielding layer 5 because the light shielding layer 5 can be easily formed and workability (productivity) is improved.
  • the light shielding layer 5 has a size (a width in the Y-axis direction and a width in advance) so that light directed from the LED 17 toward the end portion (end surface) of the liquid crystal panel 11 can be shielded even when the optical member 15 is thermally expanded.
  • the light shielding layer 5 is set.
  • the light shielding layer 5 is provided on each of two sides on the long side of the rectangular optical member 15 (optical sheet c).
  • the light shielding layer 5 is provided linearly (continuously) along each side.
  • the light guide plate 16 is made of a synthetic resin (for example, acrylic resin or polycarbonate such as PMMA) having a refractive index sufficiently higher than air and substantially transparent (excellent translucency). Like the liquid crystal panel 11 and the optical member 15, the light guide plate 16 has a horizontally long rectangular shape when viewed in plan and has a plate shape that is thicker than the optical member 15. In each drawing, the light guide plate 16 has a long side direction on the plate surfaces 16a and 16c coinciding with the X-axis direction, a short side direction on the plate surfaces 16a and 16c coincides with the Y-axis direction, and the plate surface The thickness direction (thickness direction) orthogonal to 16a and 16c is drawn so as to coincide with the Z-axis direction.
  • a synthetic resin for example, acrylic resin or polycarbonate such as PMMA
  • the light guide plate 16 is disposed so as to overlap the back side of the optical member 15, and is sandwiched between the optical member 15 and the chassis 14.
  • the light guide plate 16 is provided with an LED unit LU along the long side direction, and light from the LED 17 is introduced into an end face in the long side direction.
  • the light guide plate 16 has a function of rising and emitting light toward the optical member 15 side (front side) while propagating light from the LED 17 introduced from the end face inside.
  • a front-side plate surface (a surface facing the optical member 15) 16 a is a light emitting surface 16 a that emits internal light toward the optical member 15 and the liquid crystal panel 11.
  • both end faces 16 b on the long side extending in the X-axis direction are opposed to the LEDs 17 (LED substrates 18) respectively with a predetermined interval.
  • the light incident surface 16b is a surface extending along the X-axis direction and the Z-axis direction (the plate surface of the LED substrate 18), and is substantially orthogonal to the light emitting surface 16a. Further, the alignment direction of the LED 17 and the light incident surface 1b coincides with the Y-axis direction.
  • the light emitted from the plate surface 16c to the outside on the back side is reflected on the plate surface 16c on the back side of the light guide plate 16 (that is, the plate surface opposite to the light emission surface 16a).
  • a reflection sheet 19 that can be raised to the front side is provided so as to cover substantially the entire area.
  • the reflection sheet 19 is disposed between the chassis 14 and the light guide plate 16.
  • the reflection sheet 19 is made of a synthetic resin, and a surface having a white surface with excellent light reflectivity is used.
  • the reflection sheet 19 is set to be approximately the same size as the plate surface of the light guide plate 16.
  • At least one of the light exit surface 16a of the light guide plate 16 and the plate surface 16c on the opposite side thereof is a reflective portion (not shown) that reflects internal light or a scattering portion (not shown) that scatters internal light. ) Is patterned with a predetermined in-plane distribution, and thereby, the emitted light from the light emitting surface 16a is controlled to have a uniform distribution in the surface.
  • the LED 17 has a configuration in which an LED chip is sealed with a resin material on a substrate portion fixed to the LED substrate 18.
  • the LED chip mounted on the substrate unit has one main emission wavelength, and specifically, one that emits blue light in a single color is used.
  • the resin material that seals the LED chip is dispersed and blended with a phosphor that emits a predetermined color when excited by the blue light emitted from the LED chip, and generally emits white light as a whole. It is said.
  • a yellow phosphor that emits yellow light, a green phosphor that emits green light, and a red phosphor that emits red light are appropriately combined, or any one of them alone.
  • Used in The LED 17 is a so-called top type in which a surface opposite to the mounting surface with respect to the LED substrate 18 is a light emitting surface.
  • the LED substrate 18 has an elongated plate shape (long shape) extending along the long side direction of the light guide plate 16 (X-axis direction, longitudinal direction of the light incident surface 16 b).
  • the plate surface is arranged in the space between the frame 13 and the chassis 14 in a posture along the X-axis direction and the Z-axis direction (that is, a posture aligned in parallel with the light incident surface 16b of the light guide plate 16).
  • the LED 17 having the above-described configuration is surface-mounted on a front surface of the LED substrate 18 (that is, a surface facing the light guide plate 16), and this surface is a mounting surface 18a.
  • a plurality of LEDs 17 are arranged in a straight line on the mounting surface 18a of the LED substrate 18 along the length direction (X-axis direction) with a predetermined interval.
  • a plurality of LEDs 17 are intermittently arranged in parallel at both ends on the long side of the backlight device 12 along the long side direction.
  • the distance between the LEDs 17 adjacent in the X-axis direction (that is, the arrangement pitch of the LEDs 17) is set to be approximately equal. Note that the arrangement direction of the LEDs 17 coincides with the length direction (X-axis direction) of the LED substrate 18.
  • the mounting surface 18a of the LED substrate 18 extends along the X-axis direction, and crosses each LED 17, and connects adjacent LEDs 17 in series.
  • the wiring pattern is made of a metal film (copper foil or the like). (Shown) is formed.
  • the terminal portions formed at both ends of the wiring pattern are connected to the power supply substrate PWB via wiring members such as connectors and electric wires, so that driving power is supplied to each LED 17.
  • the base material of the LED substrate 18 is made of, for example, a metal made of aluminum or the like, and the wiring pattern described above is formed on the surface thereof via an insulating layer.
  • a solder resist layer is formed on the insulating layer to protect the wiring pattern.
  • insulating materials such as a base material of the LED board 18, you may use insulating materials, such as a ceramic.
  • the frame (frame body) 13 has a frame shape (frame shape) surrounding the display surface 11a of the liquid crystal panel 11 (see FIG. 1), and is made of a metal material having excellent heat dissipation such as aluminum.
  • the frame 13 includes a frame-shaped front surface portion 13a disposed on the front side (front side) of the liquid crystal display unit LDU (liquid crystal display device 10) and a frame-shaped peripheral wall surrounding the liquid crystal display unit LDU (liquid crystal display device 10). Part 13b.
  • the inner edge portion of the frame-shaped front surface portion 13a presses the peripheral edge portion of the liquid crystal panel 11 from the front surface side. Then, the front surface portion 13 a presses a laminate composed of the liquid crystal panel 11, the optical member 15, the light guide plate 16, and the reflection sheet 19 toward the chassis 14.
  • a peripheral wall portion 13b is provided on the outer edge portion of the front surface portion 13a. The peripheral wall portion 13b extends from the front surface portion 13a toward the chassis 14 and surrounds the liquid crystal panel 11, the light guide plate 16, the LED unit LU, and the like. As shown in FIG. 3, the cross-sectional structures of the front surface portion 13a and the peripheral wall portion 13b are substantially L-shaped. An LED unit LU is attached to the inside of the peripheral wall portion 13b.
  • the LED unit LU is attached to the frame 13 with the plate surface 18b on the back side of the LED substrate 18 in contact with the wall surface (inner peripheral surface) of the peripheral wall portion 13b.
  • the LED unit LU is fixed to the frame 13 using screws or the like.
  • the frame 13 also functions as a heat radiating member for releasing the heat generated from the LEDs 17 to the outside.
  • the chassis 14 has a horizontally long rectangular shape, and is disposed on the back side of the liquid crystal display unit LDU (liquid crystal display device 10) so as to cover the plate surface 16c on the back side of the light guide plate 16.
  • the chassis 14 is a plate-like member made of a metal material such as aluminum, and is formed, for example, into a predetermined shape using a mold.
  • the chassis 14 is in close contact with the plate surface 16 on the back side of the light guide plate 16 via a reflection sheet 19.
  • the end portion of the chassis 14 projects outward from the light incident surface 16 b of the light guide plate 16 and is in contact with the peripheral wall portion 13 b of the frame 13.
  • the frame 13 and the chassis 14 are fixed to each other using screws or the like.
  • each LED 17 of the LED unit LU is driven.
  • light L ⁇ b> 1 (see FIG. 3) is incident on the inside from the light incident surface 16 a of the light guide plate 16.
  • the incident light is reflected by the reflection sheet 19 or the like laid on the back side of the light guide plate 16 and proceeds to the optical member 15 from the front side plate surface (light emitting surface) 16a while proceeding through the light guide plate 16. It is emitted toward.
  • the emitted light passes through the optical member 15 and becomes light spread in a planar shape, and illuminates the back surface 11 b of the liquid crystal panel 11.
  • the liquid crystal panel 11 displays an image on the display surface 11a by using the light spread in a planar shape.
  • the light emitted from the LED 17 there is also light L ⁇ b> 2 that travels obliquely upward toward the end of the liquid crystal panel 11 without proceeding toward the light incident surface 16 a of the light guide plate 16.
  • the light L ⁇ b> 2 is so-called leakage light and can cause display defects in the liquid crystal display device 10.
  • the light shielding layer 5 is provided in the peripheral portion 115 of the optical member 15 in the liquid crystal display device 10 of the present embodiment, the light L2 is blocked by the light shielding layer 5. Therefore, the light L ⁇ b> 2 emitted from the LED 17 is prevented from entering from the end portion (circumferential end surface) of the liquid crystal panel 11 toward the inner side (center side) of the liquid crystal panel 11. Therefore, it is possible to suppress the occurrence of display defects due to leaked light on the display surface 11a of the liquid crystal display device 10.
  • the light shielding layer 5 is provided on the peripheral portion 115 of the optical sheet 15c arranged on the uppermost side among the three optical sheets constituting the optical member 15.
  • the optical sheet 15 c is disposed closest to the end of the liquid crystal panel 11.
  • the light shielding layer 5 is formed on the back side (back surface) of the peripheral portion 115 of the optical member 15 (optical sheet 15c).
  • the optical member 15 is set so as to adjust the light emitted from the light emitting surface 16a of the light guide plate 16 in the first place. That is, it is set to adjust light crossing the optical member 15 from the back side toward the front side. For this reason, if the light emitted from the LED 17 directly enters from the end of the optical member 15, display failure (luminance unevenness) may occur due to the incident light.
  • the peripheral portion 115 of the optical member 15 protrudes outside the light incident surface 16 a of the light guide plate 16, light easily enters the optical member 15 directly from the protruding portion 115.
  • the optical sheet is a lens sheet
  • the light shielding layer 5 is formed on the back side (back surface) of the peripheral portion 115 of the optical member (optical sheet 15c). It can block the light that enters unnecessarily.
  • FIG. 4 is a partial cross-sectional view illustrating a part of a cross-sectional configuration along the short side direction of the liquid crystal display device 10A according to the second embodiment.
  • the liquid crystal display device 10A (liquid crystal display unit LDU) of the present embodiment has the same basic configuration as the liquid crystal display device 10 of the first embodiment.
  • the light shielding layer 5A is provided on the front side, not on the back side of the peripheral portion 115 of the optical member 15 (optical sheet 15c). This is different from the case of the first embodiment.
  • the light shielding layer 5 ⁇ / b> A may be formed on the front side of the peripheral portion 115 of the optical member 15.
  • the light L ⁇ b> 2 emitted from the LED 17 is suppressed from entering from the end portion (circumferential end surface) of the liquid crystal panel 11 toward the inner side (center side) of the liquid crystal panel 11. Therefore, it is possible to suppress the occurrence of display defects due to leaked light on the display surface 11a of the liquid crystal display device 10A.
  • FIG. 5 is a partial cross-sectional view showing a part of a cross-sectional configuration along the short side direction of the liquid crystal display device 10B according to the third embodiment.
  • the liquid crystal display device 10B (liquid crystal display unit LDU) of the present embodiment has the same basic configuration as the liquid crystal display device 10 of the first embodiment.
  • the lowermost optical sheet 15a is outside the light incident surface 16a of the light guide plate 16.
  • the light shielding layer 5B is provided on the protruding portion 115B.
  • the light shielding layer 5B is formed on the back side (back surface) of the peripheral portion 115B of the optical member 15 (optical sheet 15a). Also in the liquid crystal display device 10 ⁇ / b> B of this embodiment, the light L ⁇ b> 2 emitted from the LED 17 is suppressed from entering from the end portion (circumferential end surface) of the liquid crystal panel 11 toward the inside (center side) of the liquid crystal panel 11. Therefore, it is possible to suppress the occurrence of display defects due to leakage light on the display surface 11a of the liquid crystal display device 10B.
  • FIG. 6 is a partial cross-sectional view showing a part of a cross-sectional configuration along the short side direction of the liquid crystal display device 10C according to the fourth embodiment.
  • the liquid crystal display device 10C (liquid crystal display unit LDU) of the present embodiment has the same basic configuration as the liquid crystal display device 10 of the first embodiment.
  • the light shielding layer 5C is different from the case of Embodiment 1 in that it is formed not only on the back side of the peripheral portion 115 of the optical member 15 (optical sheet 15c) but also on the end face thereof. Yes.
  • the light shielding layer 5 ⁇ / b> C is made of a light shielding tape, and is attached along the peripheral portion of the optical member 15.
  • a light shielding tape having a predetermined width is first attached to the back surface of the peripheral portion 115 of the optical member 15 (optical sheet 15c), and then the portion of the light shielding tape that protrudes outward from the peripheral portion 115 is folded back to the optical member 15 (optical sheet).
  • the light shielding layer 5C of the present embodiment is obtained.
  • the back side of the peripheral portion 115 may be shielded by the light shielding layer 5C, and the end surface of the optical member 15 (optical sheet 15c) may be shielded.
  • the light L ⁇ b> 2 emitted from the LED 17 enters from the end portion (circumferential end surface) of the liquid crystal panel 11 toward the inner side (center side) of the liquid crystal panel 11 as in the first embodiment. It is suppressed. Therefore, it is possible to suppress the occurrence of display defects due to leakage light on the display surface 11a of the liquid crystal display device 10C. Furthermore, in the case of this embodiment, the end surface in the peripheral part of the optical member 15 (optical sheet 15c) is light-shielded by the light shielding layer 5C.
  • the light entering from the end face of the optical member 15 (optical sheet 15c) to the inside can be blocked by the light blocking layer 5C.
  • the thickness of the optical sheet 15c is set to be small (thin)
  • light (leakage light) may enter inward slightly from the end face of the optical sheet 15c.
  • a light shielding layer 5C is provided on the end surface of the optical sheet 15c in order to block such light.
  • FIG. 7 is a partial cross-sectional view showing a part of a cross-sectional configuration along the short side direction of the liquid crystal display device 10D according to the fifth embodiment.
  • the liquid crystal display device 10D (liquid crystal display unit LDU) of the present embodiment has the same basic configuration as the liquid crystal display device 10 of the first embodiment.
  • the LED unit LU is different from the case of the first embodiment in that the LED unit LU is fixed to the chassis 14 and the frame 13D (frame body) while being attached to the heat dissipation member 20. .
  • the heat radiating member 20 is made of a metal material having excellent heat radiating properties such as aluminum.
  • the heat dissipating member 20 includes a support portion 20b that supports the LED substrate 18 of the LED unit LU, and an attachment portion 20a that is attached to the chassis 14, and the support portion 20b has an elongated plate shape, 18 is supported from the back surface 18b side.
  • An attachment portion 20a is provided at the base (lower end) of the support portion 20b.
  • the attachment portion 20a has an elongated plate shape, and extends toward the back of the support portion 20b (on the side opposite to the LED 17).
  • the heat radiating member 20 provided with such a support portion 20b and the attachment portion 20a is arranged along the long side direction of the light guide plate 16.
  • the heat radiating member 20 is fixed to the chassis 14 in a state where the mounting portion 20 a is placed on the plate surface of the chassis 14.
  • the frame 13D includes a frame-shaped front surface portion 13Da arranged on the front side (front surface side) of the liquid crystal display device 10D and a frame-shaped peripheral wall portion 13Db surrounding the liquid crystal display device 10D.
  • the peripheral wall portion 13Db is partially larger in thickness (thickness in the Y-axis direction) than that of the first embodiment.
  • the thick portions of the peripheral wall portion 13Db are respectively directed to the surfaces of the support portion 20b and the attachment portion 20a of the heat dissipation member 20.
  • the frame 13 ⁇ / b> D is made of a metal material such as aluminum that is excellent in heat dissipation, like the heat dissipation member 20.
  • the frame 13 ⁇ / b> D sandwiches a laminate composed of the reflection sheet 19, the light guide plate 16, the optical member 15, and the liquid crystal panel 11 with the chassis 14.
  • the heat generated with the light emission of the LED 17 moves to the chassis 14 and the frame 13D via the LED substrate 18 and the heat dissipation member 20, and further from the chassis 14 and the frame 13D to the outside air. Released.
  • the LED unit LU may be supported by the heat dissipation member 20.
  • the light shielding layer 5 is formed on the peripheral portion 115 of the optical member 15 as in the first embodiment. Also in the liquid crystal display device 10 ⁇ / b> D of the present embodiment, the light L ⁇ b> 2 emitted from the LED 17 is suppressed from entering from the end portion (circumferential end surface) of the liquid crystal panel 11 toward the inside (center side) of the liquid crystal panel 11. Therefore, it is possible to suppress the occurrence of display defects due to leakage light on the display surface 11a of the liquid crystal display device 10D.
  • FIG. 8 is a plan view showing the main configuration of the liquid crystal display device according to the sixth embodiment.
  • FIG. 8 shows the liquid crystal display device 10E with the frame, chassis, and the like removed for convenience of explanation.
  • the light shielding layer 5 is provided on the peripheral portion 115 of the optical member 15 in a state of being connected straight along the longitudinal direction (long side direction).
  • the light shielding layer 5E is formed only in the vicinity of the portion where the LED 17 is provided in the peripheral portion 115 of the optical member 15.
  • the light shielding layer 5E may be provided intermittently along the long side direction (light incident surface 16c) of the light guide plate 16 in correspondence with the arrangement state of the LEDs 17. As described above, the light shielding layer 5 may be selectively provided only in a necessary portion to suppress unnecessary absorption of light emitted from the LED 17 by the light shielding layer.
  • the liquid crystal display device of each of the embodiments described above has a configuration in which the LED units LU are arranged along the two long sides of the light guide plate 16, but in other embodiments, the liquid crystal display device is limited to this.
  • the LED unit LU may be arranged along only one long side of the light guide plate 16.
  • the LED unit LU may be arranged along one or two short sides.
  • the position of the light shielding layer 5 provided in the optical member 15 is appropriately set according to the arrangement of the LED units LU.
  • the end 11c of the liquid crystal panel 11 is set at substantially the same position as the end of the light guide plate 16, but in other embodiments, the end of the liquid crystal panel 11
  • the end portion 11c may be configured to protrude outward from the end face (light incident surface 16c) of the light guide plate 16, or conversely, the end portion 11c of the liquid crystal panel 11 may be the end face (light incident surface) of the light guide plate 16. 16c) may enter inside.
  • the end portion 11c of the liquid crystal panel 11 needs to enter inside the end portion 115 of the optical member 15 on which the light shielding layer 5 is provided.
  • the light shielding layer 5 is formed on the peripheral portion 115 of the optical member 15, for example, a black paint is applied (printed) on the peripheral portion 115 of the optical member 15 using a known printing device. Also good. Alternatively, the light shielding layer 5 may be formed by applying a black paint to the peripheral portion 115 of the optical member 15 using a brush or the like.
  • the television receiver TV is exemplified as the display device.
  • the liquid crystal display device may be used for, for example, a mobile phone or a portable information terminal.
  • a display device that does not include a tuner unit may be used.
  • the color filters of the color filter included in the liquid crystal panel 11 are exemplified by three colors R, G, and B. However, in other embodiments, the color sections are set to four or more colors. Also good. In another embodiment, a liquid crystal display device that performs monochrome display may be used.
  • a TFT is used as a switching element of a liquid crystal display device, but in other embodiments, a switching element other than a TFT (for example, a thin film diode (TFD)) may be used.
  • a switching element other than a TFT for example, a thin film diode (TFD)
  • the LED 17 is used as the light source.
  • other light sources such as a cold cathode tube may be used.

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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)

Abstract

Un dispositif d'affichage (10) selon la présente invention comprend : une plaque de guidage de lumière (16) ayant une surface d'incidence de lumière (16b) et une surface d'émission de lumière (16a) ; une source lumineuse (17) pour émettre une lumière vers la surface d'incidence de lumière (16b) ; un substrat de source lumineuse (18) ayant la source lumineuse (17) montée sur la surface de carte côté avant (18a) de telle sorte que la source lumineuse (17) est placée tournée vers la surface d'incidence de lumière (16b) à une distance prescrite ; un élément optique de type feuille (15) placé de manière à recouvrir la plaque de guidage de lumière (16b) avec une partie de bord périphérique (115) s'étendant à l'extérieur de la surface d'incidence de lumière (16b) ; une couche de protection vis-à-vis de la lumière (5) disposée sur la partie de bord périphérique (115) de l'élément optique (15) ; un panneau de cristaux liquides (11) placé de manière à recouvrir l'élément optique (15) avec une partie d'extrémité (11c) rétractée à l'intérieur de la partie de bord périphérique (115) de l'élément optique (15) ; et un corps de cadre (13) amené en contact avec la surface de carte côté avant à la partie de bord périphérique du panneau de cristaux liquides (11) tout en pinçant le panneau de cristaux liquides (11) entre le corps de cadre (13) et ladite plaque de guidage de lumière (16).
PCT/JP2012/074219 2011-09-28 2012-09-21 Dispositif d'affichage et dispositif de réception de télévision WO2013047367A1 (fr)

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JP2011212688 2011-09-28
JP2011-212688 2011-09-28

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104166271A (zh) * 2014-07-10 2014-11-26 合肥京东方显示光源有限公司 一种光学膜层及其制造方法、背光模组和显示装置
JP2015075604A (ja) * 2013-10-08 2015-04-20 株式会社ジャパンディスプレイ 液晶表示装置
CN104879678A (zh) * 2014-02-27 2015-09-02 群创光电股份有限公司 背光模块
EP3086536A1 (fr) * 2015-04-21 2016-10-26 Xiaomi Inc. Dispositif mobile avec dispositif d'affichage
US11156676B2 (en) 2017-06-05 2021-10-26 Asahi Intecc Co., Ltd. GSR sensor element

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001125102A (ja) * 1999-10-29 2001-05-11 Hitachi Ltd 液晶表示装置
WO2011077866A1 (fr) * 2009-12-23 2011-06-30 シャープ株式会社 Dispositif d'éclairage, dispositif d'affichage et dispositif de récepteur de télévision

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001125102A (ja) * 1999-10-29 2001-05-11 Hitachi Ltd 液晶表示装置
WO2011077866A1 (fr) * 2009-12-23 2011-06-30 シャープ株式会社 Dispositif d'éclairage, dispositif d'affichage et dispositif de récepteur de télévision

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015075604A (ja) * 2013-10-08 2015-04-20 株式会社ジャパンディスプレイ 液晶表示装置
CN104879678A (zh) * 2014-02-27 2015-09-02 群创光电股份有限公司 背光模块
CN104166271A (zh) * 2014-07-10 2014-11-26 合肥京东方显示光源有限公司 一种光学膜层及其制造方法、背光模组和显示装置
EP3086536A1 (fr) * 2015-04-21 2016-10-26 Xiaomi Inc. Dispositif mobile avec dispositif d'affichage
US11156676B2 (en) 2017-06-05 2021-10-26 Asahi Intecc Co., Ltd. GSR sensor element

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