WO2012050052A1 - Backlight unit and liquid crystal display device - Google Patents

Backlight unit and liquid crystal display device Download PDF

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Publication number
WO2012050052A1
WO2012050052A1 PCT/JP2011/073187 JP2011073187W WO2012050052A1 WO 2012050052 A1 WO2012050052 A1 WO 2012050052A1 JP 2011073187 W JP2011073187 W JP 2011073187W WO 2012050052 A1 WO2012050052 A1 WO 2012050052A1
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WO
WIPO (PCT)
Prior art keywords
guide plate
backlight unit
light guide
liquid crystal
backlight
Prior art date
Application number
PCT/JP2011/073187
Other languages
French (fr)
Japanese (ja)
Inventor
良武 石元
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 WO2012050052A1 publication Critical patent/WO2012050052A1/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
    • 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
    • G02F1/133602—Direct backlight
    • G02F1/133608—Direct backlight including particular frames or supporting means
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0073—Light emitting diode [LED]

Definitions

  • the present invention relates to a backlight unit or a liquid crystal display device including the backlight unit.
  • the present invention relates to a light guide plate type backlight unit using a light emitting diode (LED) as a light source and a liquid crystal display device including the same.
  • LED light emitting diode
  • the liquid crystal display device includes a liquid crystal panel in which liquid crystal is sealed between a pair of translucent substrates, and a backlight disposed on the back side of the liquid crystal panel.
  • a backlight disposed on the back side of the liquid crystal panel.
  • light emitted from the backlight is irradiated from the back side of the liquid crystal panel, so that an image displayed on the liquid crystal panel can be visually recognized.
  • FIG. 8 is an exploded perspective view showing the configuration of the backlight 1000 in the liquid crystal display device shown in Patent Document 1.
  • FIG. The backlight 1000 shown in FIG. 8 has a configuration in which the light guide plate 320 is sandwiched from above and below by a substantially box-shaped storage case 360 and a frame-shaped member 380.
  • the locking portion 361 of the storage case 360 and the locking portion 381 of the frame-like member 380 can be fitted to each other.
  • the light guide plate 320 is stored in the storage case 360 while being fixed (stored) in a substantially box-shaped resin mold 340.
  • Light emitted from a light emitting diode (not shown) mounted on the printed wiring board 310 is incident on the light guide plate 320 from the light incident surface 322, and then is emitted from the outgoing surface 321 while propagating through the light guide plate 320. Irradiates the display panel.
  • the concave fixing portions 325 a and 325 b in the light guide plate 320 and the protrusions 341 a and 341 b of the resin mold 340 are fitted to each other, and the light guide plate 320 is fixed to the resin mold 340.
  • a cushion material 342 is interposed between the light guide plate 320 and the resin mold 340.
  • a plurality of protrusions 343a and 343b are provided on the bottom surface of the resin mold 340.
  • the plurality of protrusions 343 a and 343 b can be fitted into the plurality of openings 362 a and 362 b of the storage case 360.
  • the resin mold 340 and the light guide plate 320 can be fixed to the bottom surface of the storage case 360 by fitting the locking portion 361 of the storage case 360 and the locking portion 381 of the frame-shaped member 380 to each other. .
  • the light guide plate 320 is positioned by arranging a resin mold 340 having projections 343 a and 343 b around the light guide plate 320 having concave fixing portions 325 a and 325 b. It can be carried out. However, in practice, working time is required for processing to produce the fixing portions (recess portions) 325a and 325b of the light guide plate 320 corresponding to the shapes of the protrusions 343a and 343b of the resin mold 340.
  • the present invention has been made in view of such a point, and a main object thereof is to provide a backlight unit that can easily fix a light guide plate and is suitable for narrowing the frame.
  • a backlight unit is a backlight unit that irradiates light to a liquid crystal panel, and houses a light emitting element, a light guide plate that irradiates the liquid crystal panel with light emitted from the light emitting element, and the light guide plate.
  • a part of a screw extending through the backlight chassis is disposed.
  • the positioning pin and the screw extend in parallel to the main surface of the light guide plate, and the positioning pin has a cylindrical shape in which an opening in which the screw is positioned is formed.
  • the light emitting element is a light emitting diode element.
  • the light emitting element is a cold cathode tube.
  • the concave portion of the light guide plate has a U-shaped groove shape.
  • the backlight unit further includes a bezel that presses an outer edge portion of the liquid crystal panel, and the screw penetrates the bezel and the backlight chassis and is stored in the positioning pin. ing.
  • the screw is fixed to the positioning pin so as to press the bezel against the backlight chassis.
  • the backlight unit further includes an optical sheet between the liquid crystal panel and the light guide plate, and the backlight unit presses the light guide plate and the optical sheet.
  • the screw penetrates the bezel, the resin chassis, and the backlight unit and is accommodated in the positioning pin.
  • the screw is fixed to the positioning pin so as to press the bezel and the resin chassis against the backlight chassis.
  • the liquid crystal display device according to the present invention is a liquid crystal display device including the backlight unit and a liquid crystal panel irradiated with light from the backlight unit.
  • the backlight chassis that houses the light guide plate that irradiates the liquid crystal panel with the light emitted from the light emitting element is provided with positioning pins corresponding to the recesses of the light guide plate. A part of a screw extending through the backlight chassis is disposed. Therefore, the light guide plate can be easily fixed by screws and positioning pins extending through the backlight chassis, and a backlight unit suitable for narrowing the frame can be provided.
  • FIG. 1 is an exploded perspective view schematically showing a configuration of a liquid crystal display device 100 according to an embodiment of the present invention. It is a disassembled perspective view which shows typically the surrounding structure of the positioning pin 42 in the backlight unit 50 of embodiment of this invention.
  • 3 is a cross-sectional view schematically showing a peripheral structure of a positioning pin 42.
  • FIG. It is sectional drawing which shows the structure of the backlight unit 150 used as a comparative example.
  • It is a disassembled perspective view which shows typically the structure of the modification of the liquid crystal display device 100 of embodiment of this invention.
  • 3 is a cross-sectional view schematically showing a peripheral structure of a positioning pin 42.
  • FIG. It is a disassembled perspective view which shows the structure of the backlight 1000 in the conventional liquid crystal display device.
  • FIG. 1 is an exploded perspective view schematically showing a configuration of a liquid crystal display device 100 according to an embodiment of the present invention.
  • the liquid crystal display device 100 of the present embodiment is a liquid crystal display device capable of displaying an image.
  • the liquid crystal display device 100 includes a liquid crystal panel 10 and a backlight unit 50 that irradiates the liquid crystal panel 10 with light.
  • the liquid crystal panel 10 of the present embodiment has a size of, for example, 20 inches to 110 inches (typically 32 inches to 60 inches).
  • the liquid crystal panel 10 of the present embodiment generally has a rectangular shape as a whole, and is composed of a pair of translucent substrates (glass substrates) 11 and 12. Both the substrates 11 and 12 are arranged to face each other, and a liquid crystal layer (not shown) is provided between them.
  • the liquid crystal layer is made of a liquid crystal material whose optical characteristics change with application of an electric field between the substrates 11 and 12.
  • a sealing agent (not shown) is provided on the outer edge portions of the substrates 11 and 12 to seal the liquid crystal layer.
  • polarizing plates 13 and 13 are attached to the outer surfaces of both the substrates 11 and 12, respectively.
  • the back side of the substrates 11 and 12 is the array substrate (TFT substrate) 11, while the front side is the color filter substrate (CF substrate) 12.
  • the backlight unit 50 of the present embodiment is a light source unit that irradiates the liquid crystal panel 10 with light.
  • the backlight unit 50 in the example shown in FIG. 1 is an edge light type backlight unit.
  • the backlight unit 50 of the present embodiment includes a light emitting element 35, a light guide plate 30 that irradiates the liquid crystal panel 10 with light emitted from the light emitting element 35, and a backlight chassis 40 that houses the light guide plate 30.
  • the backlight chassis 40 of the present embodiment is made of a metal material (for example, aluminum, iron, etc.) and is a sheet metal member that covers the entire back surface of the liquid crystal display device 100.
  • an optical sheet 21 (21a to 21c) is disposed between the light guide plate 30 and the liquid crystal panel 10.
  • the optical sheets 21a to 21c are, for example, a lens sheet, a prism sheet, and a diffusion plate, respectively.
  • the light emitting element 35 of the present embodiment is a light emitting diode element (LED element).
  • LED element 35 is a light emitting diode element
  • a plurality of LED elements 35 are placed on a wiring board 37.
  • the LED element 35 is disposed to face one of the side surfaces (light incident surface) 31 of the light guide plate 30, and light emitted from the LED element 35 is transmitted from the light incident surface 31 of the light guide plate 30 to the light guide plate 30.
  • the light emitting element 35 may be not only an LED element but also other elements, for example, a cold cathode tube (CCFL) can be used.
  • CCFL cold cathode tube
  • the light guide plate 30 is an optical member that irradiates light incident on the light incident surface 31 in a planar shape from the light emitting surface (main surface) 30a.
  • the light guide plate 30 is made of, for example, an acrylic plate.
  • a dot pattern (not shown) serving as a reflective layer is formed on the bottom surface 30c of the light guide plate 30 of the present embodiment. This dot pattern is formed by printing using ink or the like that forms a reflection pattern or a diffusion pattern.
  • a recess 32 is formed in a part of the side 30 b of the light guide plate 30.
  • the recess 32 is a positioning groove for the light guide plate 30.
  • the light guide plate 30 has a rectangular shape, and one recess 32 is formed on each short side of the light guide plate 30.
  • the recess 32 is formed in a part (for example, the center position) of the short side 30b extending in the Y direction of the light guide plate 30.
  • the recess 32 in the example shown in FIG. 1 has a U-shaped groove shape. More specifically, the tip of the recess 32 (the center side of the light guide plate 30) has a substantially semicircular shape.
  • the backlight chassis 40 in which the light guide plate 30 is housed is provided with positioning pins 42 corresponding to the recesses 32.
  • a hole (screw hole) through which the screw 44 passes is formed inside the positioning pin 42.
  • the backlight chassis 40 also has a hole (through hole) 46 through which the screw 44 passes.
  • the positioning pins 42 and screws 44 of the present embodiment extend in parallel to the main surface (light emitting surface) 30a of the light guide plate 30.
  • the positioning pins 42 and the screws 44 extend parallel (or substantially parallel) to the XY plane.
  • the positioning pin 42 and the screw 44 extend in the X direction.
  • the positioning pin 42 of the present embodiment is made of resin, for example.
  • the positioning pin 42 of the present embodiment has a cylindrical shape, but may have a shape other than that (for example, a rectangular column such as a square column). When the positioning pin 42 has a cylindrical shape, the diameter thereof can be determined corresponding to the concave portion 32 of the light guide plate 30.
  • the screws 44 of the present embodiment are made of, for example, a metal material (iron, aluminum, etc.) or a resin material.
  • the screw 44 is a so-called small screw having a thread, but other types of screws can be used as long as both the screw 44 and the positioning pin 42 can be fixed.
  • a bezel 70 is provided in the liquid crystal display device 100 of the present embodiment.
  • the bezel 70 is made of a metal material (for example, aluminum or iron), and is a frame member that holds and fixes the outer edge portion of the liquid crystal panel.
  • the bezel 70 is attached to the backlight chassis 40 in a state where the liquid crystal panel 10, the optical sheet 21, the light guide plate 30 and the light emitting element 35 are accommodated in the backlight chassis 40.
  • a hole (through hole) 72 through which the screw 44 passes is formed. Accordingly, a part (tip) of the screw 44 can pass through the bezel 70 and the backlight chassis 40 and be accommodated in the positioning pin 42.
  • FIG. 2 is an exploded perspective view schematically showing the peripheral structure of the positioning pin 42 in the backlight unit 50 of the present embodiment.
  • FIG. 3 is a cross-sectional view schematically showing the peripheral structure of the positioning pin 42.
  • the positioning pin 42 is inserted into the opening of the recess 32 in the light guide plate 30.
  • the screw 44 is screwed to the positioning pin 42 so as to penetrate the bezel 70 and the backlight chassis 40.
  • the bezel 70 and the backlight chassis 40 can be fixed by fastening the screws 44 and the positioning pins 42.
  • the light guide plate 30 can be fixed by the positioning pins 42.
  • a thread groove is formed in the penetration portion of the screw 44 of the present embodiment, and when the screw 44 is tightened so as to go in the direction of the arrow 45, the tip portion of the screw 44 is an opening portion of the positioning pin 42. 42a.
  • the illustrated recess 32 has a U-shaped groove, and the screw 44 can be pushed in the direction of the arrow 45 so that the tip of the positioning pin 42 contacts a part of the U-shaped groove 32. is there.
  • the configuration of the present embodiment also has an effect that it becomes easy to cope with the delicate alignment of the light guide plate 30 with the positioning pins 42 by pushing the screws 44 like this. Further, since the screw 44 is fixed to the positioning pin 42 so as to press the bezel 70 against the backlight chassis 40, the screw 44 has a technical value in executing the narrowing of the frame of the liquid crystal display device 100.
  • FIG. 4 is a cross-sectional view showing a configuration of a backlight unit 150 as a comparative example.
  • the convex portion 142 formed by the resin mold member 141 is disposed corresponding to the light guide plate 130 in which the positioning concave portion 132 is formed.
  • the resin mold member 141 including the convex portion 142 is formed on the surface of the backlight chassis 140.
  • a bezel 170 is positioned on the outer periphery of the backlight chassis 140.
  • a screw hole 148 extending in the vertical direction (Z direction) of the backlight chassis 140 is formed, and the backlight chassis 140 is inserted by inserting a screw (not shown) into the screw hole 148.
  • a screw not shown
  • other members for example, bezel 170
  • the backlight chassis 140 is provided with a screw hole 148 for fastening and fixing to other members (for example, the bezel 170), the presence of the screw hole 148 reduces the frame. It becomes difficult to execute.
  • a plurality of protrusions 343 a and 343 b are provided on the bottom surface of the resin mold 340 and are fitted into the plurality of openings 362 a and 362 b of the storage case 360.
  • the backlight chassis 40 that houses the light guide plate 30 is provided with the positioning pins 42 corresponding to the recesses 32 of the light guide plate 30, and the positioning pins 42 include the backlight chassis.
  • a part of a screw 44 extending through 40 is disposed. Therefore, the light guide plate 30 can be easily fixed by the screws 44 and the positioning pins 42 extending through the backlight chassis 40.
  • the light guide plate 30 can be fixed to the backlight chassis 40 by the screws 44 and the positioning pins 42, and the bezel 70 is fixed to the backlight chassis 40. can do. Therefore, the backlight unit 50 suitable for narrowing the frame can be realized. That is, according to the configuration of the present embodiment, the gap between the light guide plate 30 and the backlight chassis 40 including the positioning pins 42 can be narrowed, and the screw holes 148 shown in FIG. 4 are formed. It can be omitted. As a result, the distance L1 from the end of the light guide plate 30 shown in FIG. 3 to the outer surface of the bezel 70 can be made smaller than the distance L2 shown in FIG. 4, and therefore facilitates narrowing of the frame.
  • the backlight unit 50 (or the liquid crystal display device 100) can be realized.
  • FIG. 5 is an exploded perspective view schematically showing a configuration of a modified example of the liquid crystal display device 100 of the present embodiment.
  • FIG. 6 is an exploded perspective view schematically showing the peripheral structure of the positioning pin 42 in the modified backlight unit 50.
  • FIG. 7 is a cross-sectional view schematically showing the peripheral structure of the positioning pin 42.
  • the liquid crystal display device 100 shown in FIG. 5 includes a resin chassis 60 for pressing the optical sheets 21 (21a to 21c).
  • the resin chassis 60 is a frame member that presses and fixes the outer edge of the optical sheet 21 and is made of resin.
  • the liquid crystal panel 10 is disposed on the resin chassis 60, and the resin chassis 60 is accommodated in the backlight chassis 40 in a form in which the optical sheet 21 and the light guide plate 30 are pressed.
  • a reflection sheet 33 is provided under the light guide plate 30.
  • the reflection sheet 33 is disposed on the bottom surface of the backlight chassis 40.
  • the reflective sheet 33 may be attached to the back surface of the light guide plate 30 without arranging the reflective sheet 33 on the bottom surface of the backlight chassis 40.
  • the shape of the recess 32 of the light guide plate 30 is a shape other than the U-shaped groove (rectangular groove). In this way, the shape of the recess 32 of the light guide plate 30 may be other shapes.
  • the concave portion 32 of the light guide plate 30 has a U-shaped groove as in the configuration shown in FIG. 1, the following effects can be obtained. That is, in the case of the U-shaped groove, the area (area viewed from the upper surface) of the groove (recess 32) can be reduced as compared with the rectangular groove. When the outer side of the light guide plate 30 is processed with a blade, the working time can be reduced if the processing area at that time is reduced. In addition, when the U-shaped groove is used, the width of the groove can be made smaller than that of the rectangular groove. Therefore, when the light guide plate 30 expands and contracts with the same coefficient of thermal expansion, the expansion amount (absolute amount) of the groove width. Can be reduced.
  • a screw 44 is inserted into the positioning pin 42 corresponding to the concave portion 32 of the light guide plate 30.
  • the positioning pin 42 is inserted into the recess 32 of the light guide plate 30 to fix the light guide plate 30.
  • the screw 44 passes through the through hole 72 of the bezel 70, the through hole 62 of the resin chassis 60, and the through hole 46 of the backlight chassis 40, the bezel 70, the resin chassis 60, and the back as shown in FIG.
  • the light chassis 40 is fixed.
  • the light guide plate 30 can be fixed (or positioned) to the backlight chassis 40 by the positioning pins 42 into which the tips of the screws 44 are inserted.
  • the light guide plate 30 can be fixed to the backlight chassis 40 by the screws 44 and the positioning pins 42, and the bezel 70 and the resin chassis 60 are fixed to the backlight chassis 40. Can do. Therefore, the backlight unit 50 suitable for narrowing the frame can be realized. That is, since the screw 44 can be fixed to the positioning pin 42 so as to press the bezel 70 and the resin chassis 60 against the backlight chassis 40, the technical value in executing the narrowing of the frame of the liquid crystal display device 100 can be obtained. Have.
  • a control device that controls the driving of the liquid crystal panel 10 and / or the light emitting element (LED element) 35 can be included.
  • a control device comprises a semiconductor integrated circuit.
  • the control device of the present embodiment includes a liquid crystal panel driving unit and an LED driving unit.
  • the liquid crystal panel driving unit is a part that displays an image on the liquid crystal panel 10 by driving the liquid crystal panel 10, and corresponds to a driver circuit such as a gate driver or a source driver.
  • the LED driving unit is a part for individually turning on / off each LED element 35 or changing the light emission intensity, and is configured by a driver circuit including, for example, a switch.
  • a plurality of the LED elements 35 of the present embodiment are arranged so as to emit light to the light guide plate 30, and are made of, for example, white LEDs.
  • the LED elements 35 are arranged on one side of the light guide plate 30, but not limited thereto, the LED elements 35 are arranged on two sides or more (for example, three sides) of the light guide plate 30. Is also possible.
  • the recessed part 32 of the light-guide plate 30 of the example shown in FIG. 1 was provided in two places, it may not be restricted to it but may be provided in three places, and may be provided in one place.
  • the image display unit is configured by using one liquid crystal panel 10, but one image display unit (multi-display) may be configured by combining a plurality of liquid crystal panels 10. Is possible.
  • the liquid crystal display device 100 in which such a plurality of liquid crystal panels 10 are combined can be used for a large-screen digital signage (for example, a display device of 100 inches or more).
  • a light guide plate can be easily fixed, and a backlight unit suitable for narrowing the frame can be provided.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Planar Illumination Modules (AREA)

Abstract

Provided is a backlight unit which is configured so that a light guide plate can be easily affixed and which enables the sides of a frame to be narrowed. A backlight unit (50) for applying light to a liquid crystal panel (10) is provided with: light emitting elements (35); a light guide plate (30) for applying the light, which is emitted by the light emitting elements (35), to the liquid crystal panel (10); and a backlight chassis (40) for containing the light guide plate (30). A recess (32) is formed in at least a part of each of sides (30b) of the light guide plate (30). Positioning pins (42) corresponding to the recesses (32) are provided to the backlight chassis (40). A part of a screw (44) extending and penetrating through the backlight chassis (40) is disposed within each of the positioning pins (42).

Description

バックライトユニットおよび液晶表示装置Backlight unit and liquid crystal display device
　本発明は、バックライトユニットまたはバックライトユニットを備えた液晶表示装置に関する。特に、発光ダイオード（ＬＥＤ）を光源として用いる導光板方式のバックライトユニットおよびそれを備えた液晶表示装置に関する。
　なお、本出願は２０１０年１０月１３日に出願された日本国特許出願２０１０－２３０９０２号に基づく優先権を主張しており、その出願の全内容は本明細書中に参照として組み入れられている。 The present invention relates to a backlight unit or a liquid crystal display device including the backlight unit. In particular, the present invention relates to a light guide plate type backlight unit using a light emitting diode (LED) as a light source and a liquid crystal display device including the same.
Note that this application claims priority based on Japanese Patent Application No. 2010-230902 filed on Oct. 13, 2010, the entire contents of which are incorporated herein by reference. .
　液晶表示装置は、一対の透光性基板の間に液晶が封止されてなる液晶パネルと、当該液晶パネルの背面側に配置されたバックライトとから構成されている。液晶表示装置では、バックライトから出射された光が液晶パネルの背面側から照射されることによって、液晶パネルに表示された画像が視認可能となる。 The liquid crystal display device includes a liquid crystal panel in which liquid crystal is sealed between a pair of translucent substrates, and a backlight disposed on the back side of the liquid crystal panel. In the liquid crystal display device, light emitted from the backlight is irradiated from the back side of the liquid crystal panel, so that an image displayed on the liquid crystal panel can be visually recognized.
　従来のバックライトは、発光素子（光源と呼ぶこともある。）として冷陰極蛍光管を用いたものが多かったが、近年は、発光素子として発光ダイオード（ＬＥＤ）を用いたバックライトも増えてきている。ＬＥＤを用いたバックライトは、特に、携帯型電子機器の表示部に用いる液晶表示装置で多く採用されている（例えば、特許文献１など）。 Many conventional backlights use cold cathode fluorescent tubes as light emitting elements (sometimes referred to as light sources), but in recent years, backlights using light emitting diodes (LEDs) as light emitting elements have also increased. ing. Backlights using LEDs are often used particularly in liquid crystal display devices used in display units of portable electronic devices (for example, Patent Document 1).
　図８は、特許文献１に示した液晶表示装置におけるバックライト１０００の構成を示す分解斜視図である。図８に示したバックライト１０００は、概略箱型の収納ケース３６０とフレーム状の部材３８０とによって、導光板３２０を上下から挟み込む構成となっている。ここでは、収納ケース３６０の係止部３６１と、フレーム状の部材３８０の係止部３８１とを互いに嵌め込むことができる。 FIG. 8 is an exploded perspective view showing the configuration of the backlight 1000 in the liquid crystal display device shown in Patent Document 1. FIG. The backlight 1000 shown in FIG. 8 has a configuration in which the light guide plate 320 is sandwiched from above and below by a substantially box-shaped storage case 360 and a frame-shaped member 380. Here, the locking portion 361 of the storage case 360 and the locking portion 381 of the frame-like member 380 can be fitted to each other.
　導光板３２０は、概略箱型の樹脂モールド３４０に固定（収納）された状態で、収納ケース３６０に収納される。プリント配線板３１０に搭載された発光ダイオード（不図示）が発した光は、入光面３２２から導光板３２０に入射した後、導光板３２０を伝播しながら、出向面３２１から出射して、液晶表示パネルに照射される。 The light guide plate 320 is stored in the storage case 360 while being fixed (stored) in a substantially box-shaped resin mold 340. Light emitted from a light emitting diode (not shown) mounted on the printed wiring board 310 is incident on the light guide plate 320 from the light incident surface 322, and then is emitted from the outgoing surface 321 while propagating through the light guide plate 320. Irradiates the display panel.
　導光板３２０における凹形状の固定部３２５ａ、３２５ｂと、樹脂モールド３４０の突出部３４１ａ、３４１ｂとは互いに嵌合して、導光板３２０は樹脂モールド３４０に固定される。この例では、導光板３２０と樹脂モールド３４０との間にクッション材３４２を介在させている。また、樹脂モールド３４０の底面には、複数の突起部３４３ａ、３４３ｂが設けられている。複数の突起部３４３ａ、３４３ｂは、収納ケース３６０の複数の開口部３６２ａ、３６２ｂに嵌合することができる。この状態で、収納ケース３６０の係止部３６１と、フレーム状の部材３８０の係止部３８１とを互いに嵌め込めば、樹脂モールド３４０および導光板３２０を収納ケース３６０の底面に固定することができる。 The concave fixing portions 325 a and 325 b in the light guide plate 320 and the protrusions 341 a and 341 b of the resin mold 340 are fitted to each other, and the light guide plate 320 is fixed to the resin mold 340. In this example, a cushion material 342 is interposed between the light guide plate 320 and the resin mold 340. A plurality of protrusions 343a and 343b are provided on the bottom surface of the resin mold 340. The plurality of protrusions 343 a and 343 b can be fitted into the plurality of openings 362 a and 362 b of the storage case 360. In this state, the resin mold 340 and the light guide plate 320 can be fixed to the bottom surface of the storage case 360 by fitting the locking portion 361 of the storage case 360 and the locking portion 381 of the frame-shaped member 380 to each other. .
特開２０１０－２７４５号公報JP 2010-2745 A
　図８に示したバックライト１０００の場合、凹形状の固定部３２５ａ、３２５ｂを有する導光板３２０の周囲に、突起部３４３ａ、３４３ｂを有する樹脂モールド３４０を配置することによって、導光板３２０の位置決めを行うことができる。しかしながら、実際には、樹脂モールド３４０の突起部３４３ａ、３４３ｂの形状に対応した導光板３２０の固定部（凹部）３２５ａ、３２５ｂを作製する加工のために、作業時間が必要となる。 In the case of the backlight 1000 shown in FIG. 8, the light guide plate 320 is positioned by arranging a resin mold 340 having projections 343 a and 343 b around the light guide plate 320 having concave fixing portions 325 a and 325 b. It can be carried out. However, in practice, working time is required for processing to produce the fixing portions (recess portions) 325a and 325b of the light guide plate 320 corresponding to the shapes of the protrusions 343a and 343b of the resin mold 340.
　また、導光板３２０の熱膨張・収縮を考慮して設計を行う関係上、導光板３２０の固定部（凹部）３２５ａ、３２５ｂと、樹脂モールド３４０の突起部３４３ａ、３４３ｂとの間に、大きく隙間を設ける必要があり、ガタツキの原因となる。さらに、樹脂モールド３４０の突起部３４３ａ、３４３ｂで導光板３２０を固定するので、導光板３４０の端辺から、フレーム状の部材３８０の外面までの距離が長くなり、そのため、狭額縁化を実行することが難しくなる。 In addition, since the design is performed in consideration of the thermal expansion / contraction of the light guide plate 320, there is a large gap between the fixing portions (recess portions) 325a and 325b of the light guide plate 320 and the projection portions 343a and 343b of the resin mold 340. It is necessary to provide this, which causes backlash. Furthermore, since the light guide plate 320 is fixed by the protrusions 343a and 343b of the resin mold 340, the distance from the end side of the light guide plate 340 to the outer surface of the frame-shaped member 380 is increased, and therefore the narrowing of the frame is performed. It becomes difficult.
　本発明はかかる点に鑑みてなされたものであり、その主な目的は、簡単に導光板を固定することができるとともに、狭額縁化に適したバックライトユニットを提供することにある。 The present invention has been made in view of such a point, and a main object thereof is to provide a backlight unit that can easily fix a light guide plate and is suitable for narrowing the frame.
　本発明に係るバックライトユニットは、液晶パネルに光を照射するバックライトユニットであり、発光素子と、前記発光素子が発した光を前記液晶パネルに照射させる導光板と、前記導光板を収納するバックライトシャーシとを備え、前記導光板の辺の少なくとも一部には、凹部が形成されており、前記凹部に対応した位置決めピンが、前記バックライトシャーシに設けられており、前記位置決めピンには、前記バックライトシャーシを貫通して延びるビスの一部が配置されている。
　ある好適な実施形態において、前記位置決めピン及び前記ビスは、前記導光板の主面に対して平行に延びており、前記位置決めピンは、内部に前記ビスが位置する開口部が形成された円柱形状を有する。
　ある好適な実施形態において、前記発光素子は、発光ダイオード素子である。
　ある好適な実施形態において、前記発光素子は、冷陰極管である。
　ある好適な実施形態において、前記導光板の凹部は、Ｕ字溝の形状を有している。
　ある好適な実施形態において、さらに、前記バックライトユニットは、前記液晶パネルの外縁部を押さえつけるベゼルを備えており、前記ビスは、前記ベゼルおよび前記バックライトシャーシを貫通して前記位置決めピンに収納されている。
　ある好適な実施形態において、前記ビスは、前記ベゼルを前記バックライトシャーシに押し付けるように前記位置決めピンに固定されている。
　ある好適な実施形態において、さらに、前記バックライトユニットは、前記液晶パネルと前記導光板との間に光学シートを備えており、前記バックライトユニットは、前記導光板および前記光学シートを押さえつける樹脂シャーシを備えており、前記ビスは、前記ベゼル、前記樹脂シャーシおよび前記バックライトユニットを貫通して前記位置決めピンに収納されている。
　ある好適な実施形態において、前記ビスは、前記ベゼルおよび前記樹脂シャーシを前記バックライトシャーシに押し付けるように前記位置決めピンに固定されている。
　本発明に係る液晶表示装置は、前記バックライトユニットと、前記バックライトユニットからの光が照射される液晶パネルとを備えた液晶表示装置である。 A backlight unit according to the present invention is a backlight unit that irradiates light to a liquid crystal panel, and houses a light emitting element, a light guide plate that irradiates the liquid crystal panel with light emitted from the light emitting element, and the light guide plate. A backlight chassis, a recess is formed in at least a part of the side of the light guide plate, and a positioning pin corresponding to the recess is provided in the backlight chassis. A part of a screw extending through the backlight chassis is disposed.
In a preferred embodiment, the positioning pin and the screw extend in parallel to the main surface of the light guide plate, and the positioning pin has a cylindrical shape in which an opening in which the screw is positioned is formed. Have
In a preferred embodiment, the light emitting element is a light emitting diode element.
In a preferred embodiment, the light emitting element is a cold cathode tube.
In a preferred embodiment, the concave portion of the light guide plate has a U-shaped groove shape.
In a preferred embodiment, the backlight unit further includes a bezel that presses an outer edge portion of the liquid crystal panel, and the screw penetrates the bezel and the backlight chassis and is stored in the positioning pin. ing.
In a preferred embodiment, the screw is fixed to the positioning pin so as to press the bezel against the backlight chassis.
In a preferred embodiment, the backlight unit further includes an optical sheet between the liquid crystal panel and the light guide plate, and the backlight unit presses the light guide plate and the optical sheet. The screw penetrates the bezel, the resin chassis, and the backlight unit and is accommodated in the positioning pin.
In a preferred embodiment, the screw is fixed to the positioning pin so as to press the bezel and the resin chassis against the backlight chassis.
The liquid crystal display device according to the present invention is a liquid crystal display device including the backlight unit and a liquid crystal panel irradiated with light from the backlight unit.
　本発明によれば、発光素子が発した光を液晶パネルに照射させる導光板を収納するバックライトシャーシに、導光板の凹部に対応した位置決めピンが設けられており、そして、位置決めピンには、バックライトシャーシを貫通して延びるビスの一部が配置されている。したがって、バックライトシャーシを貫通して延びるビスおよび位置決めピンによって簡単に導光板を固定することができるとともに、狭額縁化に適したバックライトユニットを提供することができる。 According to the present invention, the backlight chassis that houses the light guide plate that irradiates the liquid crystal panel with the light emitted from the light emitting element is provided with positioning pins corresponding to the recesses of the light guide plate. A part of a screw extending through the backlight chassis is disposed. Therefore, the light guide plate can be easily fixed by screws and positioning pins extending through the backlight chassis, and a backlight unit suitable for narrowing the frame can be provided.
本発明の実施形態に係る液晶表示装置１００の構成を模式的に示す分解斜視図である。1 is an exploded perspective view schematically showing a configuration of a liquid crystal display device 100 according to an embodiment of the present invention. 本発明の実施形態のバックライトユニット５０における位置決めピン４２の周辺構造を模式的に示す分解斜視図である。It is a disassembled perspective view which shows typically the surrounding structure of the positioning pin 42 in the backlight unit 50 of embodiment of this invention. 位置決めピン４２の周辺構造を模式的に示す断面図である。3 is a cross-sectional view schematically showing a peripheral structure of a positioning pin 42. FIG. 比較例となるバックライトユニット１５０の構成を示す断面図である。It is sectional drawing which shows the structure of the backlight unit 150 used as a comparative example. 本発明の実施形態の液晶表示装置１００の改変例の構成を模式的に示す分解斜視図である。It is a disassembled perspective view which shows typically the structure of the modification of the liquid crystal display device 100 of embodiment of this invention. 改変例のバックライトユニット５０における位置決めピン４２の周辺構造を模式的に示す分解斜視図である。It is a disassembled perspective view which shows typically the peripheral structure of the positioning pin 42 in the backlight unit 50 of the modification. 位置決めピン４２の周辺構造を模式的に示す断面図である。3 is a cross-sectional view schematically showing a peripheral structure of a positioning pin 42. FIG. 従来の液晶表示装置におけるバックライト１０００の構成を示す分解斜視図である。It is a disassembled perspective view which shows the structure of the backlight 1000 in the conventional liquid crystal display device.
　以下、図面を参照しながら、本発明の実施形態を説明する。以下の図面においては、説明の簡潔化のために、実質的に同一の機能を有する構成要素を同一の参照符号で示す。なお、本発明は以下の実施形態に限定されない。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following drawings, components having substantially the same function are denoted by the same reference numerals for the sake of brevity. In addition, this invention is not limited to the following embodiment.
　図１は、本発明の実施形態に係る液晶表示装置１００の構成を模式的に示す分解斜視図である。図１に示すように、本実施形態の液晶表示装置１００は、画像を表示可能な液晶表示装置である。液晶表示装置１００は、液晶パネル１０と、液晶パネル１０に光を照射するバックライトユニット５０とから構成されている。本実施形態の液晶パネル１０は、例えば、２０インチから１１０インチ（典型的には、３２インチから６０インチ）のサイズを有している。 FIG. 1 is an exploded perspective view schematically showing a configuration of a liquid crystal display device 100 according to an embodiment of the present invention. As shown in FIG. 1, the liquid crystal display device 100 of the present embodiment is a liquid crystal display device capable of displaying an image. The liquid crystal display device 100 includes a liquid crystal panel 10 and a backlight unit 50 that irradiates the liquid crystal panel 10 with light. The liquid crystal panel 10 of the present embodiment has a size of, for example, 20 inches to 110 inches (typically 32 inches to 60 inches).
　本実施形態の液晶パネル１０は、概して、全体として矩形の形状を有しており、一対の透光性基板（ガラス基板）１１および１２から構成されている。両基板１１および１２は、互いに対向して配置され、その間には液晶層（不図示）が設けられている。液晶層は、基板１１および１２の間の電界印加に伴って光学特定が変化する液晶材料からなる。なお、基板１１および１２の外縁部には、シール剤（不図示）が設けられて、液晶層を封止している。また、両基板１１および１２の外面には、それぞれ、偏光板１３、１３が貼り付けられている。本実施形態では、基板１１および１２のうち、裏側がアレイ基板（ＴＦＴ基板）１１であり、一方、表側がカラーフィルタ基板（ＣＦ基板）１２である。 The liquid crystal panel 10 of the present embodiment generally has a rectangular shape as a whole, and is composed of a pair of translucent substrates (glass substrates) 11 and 12. Both the substrates 11 and 12 are arranged to face each other, and a liquid crystal layer (not shown) is provided between them. The liquid crystal layer is made of a liquid crystal material whose optical characteristics change with application of an electric field between the substrates 11 and 12. A sealing agent (not shown) is provided on the outer edge portions of the substrates 11 and 12 to seal the liquid crystal layer. Further, polarizing plates 13 and 13 are attached to the outer surfaces of both the substrates 11 and 12, respectively. In this embodiment, the back side of the substrates 11 and 12 is the array substrate (TFT substrate) 11, while the front side is the color filter substrate (CF substrate) 12.
　本実施形態のバックライトユニット５０は、液晶パネル１０に光を照射する光源ユニットである。図１に示した例のバックライトユニット５０は、エッジライト型のバックライトユニットである。本実施形態のバックライトユニット５０は、発光素子３５と、発光素子３５が発した光を液晶パネル１０に照射させる導光板３０と、導光板３０を収納するバックライトシャーシ４０とを備えている。本実施形態のバックライトシャーシ４０は、金属材料（例えば、アルミニウム、鉄など）から構成されており、液晶表示装置１００の裏面全体を覆う板金部材である。 The backlight unit 50 of the present embodiment is a light source unit that irradiates the liquid crystal panel 10 with light. The backlight unit 50 in the example shown in FIG. 1 is an edge light type backlight unit. The backlight unit 50 of the present embodiment includes a light emitting element 35, a light guide plate 30 that irradiates the liquid crystal panel 10 with light emitted from the light emitting element 35, and a backlight chassis 40 that houses the light guide plate 30. The backlight chassis 40 of the present embodiment is made of a metal material (for example, aluminum, iron, etc.) and is a sheet metal member that covers the entire back surface of the liquid crystal display device 100.
　また、導光板３０と液晶パネル１０との間には、光学シート２１（２１ａから２１ｃ）が配置されている。この例では、光学シート２１ａから２１ｃは、それぞれ、例えば、レンズシート、プリズムシート、拡散板である。本実施形態の発光素子３５は、発光ダイオード素子（ＬＥＤ素子）である。図１に示した構成例では、複数のＬＥＤ素子３５が配線基板３７の上に載置されている。ＬＥＤ素子３５は、導光板３０の側面の一つ（入光面）３１に対向して配置されており、ＬＥＤ素子３５から出射された光は、導光板３０の入光面３１から導光板３０内に入射する。なお、発光素子３５は、ＬＥＤ素子だけでなく他のものでもよく、例えば冷陰極管（ＣＣＦＬ）を用いることも可能である。 Further, an optical sheet 21 (21a to 21c) is disposed between the light guide plate 30 and the liquid crystal panel 10. In this example, the optical sheets 21a to 21c are, for example, a lens sheet, a prism sheet, and a diffusion plate, respectively. The light emitting element 35 of the present embodiment is a light emitting diode element (LED element). In the configuration example shown in FIG. 1, a plurality of LED elements 35 are placed on a wiring board 37. The LED element 35 is disposed to face one of the side surfaces (light incident surface) 31 of the light guide plate 30, and light emitted from the LED element 35 is transmitted from the light incident surface 31 of the light guide plate 30 to the light guide plate 30. Incident in. Note that the light emitting element 35 may be not only an LED element but also other elements, for example, a cold cathode tube (CCFL) can be used.
　導光板３０は、入光面３１に入射した光を、発光面（主面）３０ａから面状に照射する光学部材である。導光板３０は、例えば、アクリル板から構成されている。本実施形態の導光板３０の底面３０ｃには、反射層となるドットパターン（不図示）が形成されている。このドットパターンは、反射パターン又は拡散パターンを形成するインクなどを用いて印刷によって形成されている。 The light guide plate 30 is an optical member that irradiates light incident on the light incident surface 31 in a planar shape from the light emitting surface (main surface) 30a. The light guide plate 30 is made of, for example, an acrylic plate. A dot pattern (not shown) serving as a reflective layer is formed on the bottom surface 30c of the light guide plate 30 of the present embodiment. This dot pattern is formed by printing using ink or the like that forms a reflection pattern or a diffusion pattern.
  導光板３０の辺３０ｂの一部には、凹部３２が形成されている。この凹部３２は、導光板３０の位置決め用の溝である。本実施形態では、導光板３０は、長方形の形状を有しており、凹部３２は、導光板３０の各短辺において１つずつ形成されている。言い換えると、導光板３０のＹ方向に延びる短辺３０ｂの一部（例えば、中央位置）に凹部３２が形成されている。また、図１に示した例の凹部３２は、Ｕ字溝の形状を有している。より具体的には、凹部３２の先端（導光板３０の中央側）は略半円形の形状を有している。 A recess 32 is formed in a part of the side 30 b of the light guide plate 30. The recess 32 is a positioning groove for the light guide plate 30. In the present embodiment, the light guide plate 30 has a rectangular shape, and one recess 32 is formed on each short side of the light guide plate 30. In other words, the recess 32 is formed in a part (for example, the center position) of the short side 30b extending in the Y direction of the light guide plate 30. Further, the recess 32 in the example shown in FIG. 1 has a U-shaped groove shape. More specifically, the tip of the recess 32 (the center side of the light guide plate 30) has a substantially semicircular shape.
　導光板３０が収納されるバックライトシャーシ４０には、凹部３２に対応した位置決めピン４２が設けられている。位置決めピン４２の内部には、ビス４４が通る穴（ビス穴）が形成されている。また、バックライトシャーシ４０にも、ビス４４が通る穴（貫通穴）４６が形成されている。導光板３０をバックライトシャーシ４０に収納し（矢印５５参照）、導光板３０の凹部３２に位置決めピン４２をセットさせた後、ビス４４を、バックライトシャーシ４０を貫通させて位置決めピン４２の内部に配置させる（矢印４５参照）。すなわち、位置決めピン４２には、バックライトシャーシ４０を貫通して延びるビス４４の一部（先端）が配置されている。 The backlight chassis 40 in which the light guide plate 30 is housed is provided with positioning pins 42 corresponding to the recesses 32. A hole (screw hole) through which the screw 44 passes is formed inside the positioning pin 42. The backlight chassis 40 also has a hole (through hole) 46 through which the screw 44 passes. After the light guide plate 30 is accommodated in the backlight chassis 40 (see arrow 55) and the positioning pins 42 are set in the recesses 32 of the light guide plate 30, the screws 44 are passed through the backlight chassis 40 and inside the positioning pins 42. (See arrow 45). That is, a part (tip) of a screw 44 extending through the backlight chassis 40 is disposed on the positioning pin 42.
　本実施形態の位置決めピン４２及びビス４４は、導光板３０の主面（発光面）３０ａに対して平行に延びている。言い換えると、位置決めピン４２及びビス４４は、Ｘ－Ｙ平面に対して平行（または実質的に平行）に延びている。具体的には、位置決めピン４２及びビス４４は、Ｘ方向に延びている。本実施形態の位置決めピン４２は、例えば、樹脂から構成されている。本実施形態の位置決めピン４２は、円柱形状を有しているが、それ以外の形状（例えば、四角柱のような角柱）であっても構わない。位置決めピン４２が円柱形状である場合、その直径は、導光板３０の凹部３２に対応して決定することができる。また、本実施形態のビス４４は、例えば、金属材料（鉄、アルミニウムなど）、樹脂材料からなる。ビス４４は、ネジ山を有する所謂小ネジであるが、ビス４４と位置決めピン４２との両者を固定することができるのであれば、他の形態のものを使用することも可能である。例えば、ビス４４にネジ山を設けずに、ビス４４と位置決めピン４２との両者を接着などの手法で固定することも可能である。 The positioning pins 42 and screws 44 of the present embodiment extend in parallel to the main surface (light emitting surface) 30a of the light guide plate 30. In other words, the positioning pins 42 and the screws 44 extend parallel (or substantially parallel) to the XY plane. Specifically, the positioning pin 42 and the screw 44 extend in the X direction. The positioning pin 42 of the present embodiment is made of resin, for example. The positioning pin 42 of the present embodiment has a cylindrical shape, but may have a shape other than that (for example, a rectangular column such as a square column). When the positioning pin 42 has a cylindrical shape, the diameter thereof can be determined corresponding to the concave portion 32 of the light guide plate 30. The screws 44 of the present embodiment are made of, for example, a metal material (iron, aluminum, etc.) or a resin material. The screw 44 is a so-called small screw having a thread, but other types of screws can be used as long as both the screw 44 and the positioning pin 42 can be fixed. For example, it is possible to fix both the screw 44 and the positioning pin 42 by a technique such as adhesion without providing a screw thread on the screw 44.
　本実施形態の液晶表示装置１００にはベゼル７０が設けられている。ベゼル７０は、金属材料（例えば、アルミニウム、鉄）からなり、液晶パネルの外縁部を押さえて固定するフレーム部材である。本実施形態の構成においては、液晶パネル１０、光学シート２１、導光板３０及び発光素子３５をバックライトシャーシ４０に収納した状態で、そのバックライトシャーシ４０にベゼル７０を取り付ける。本実施形態のベゼル７０には、ビス４４が通る穴（貫通穴）７２が形成されている。したがって、ビス４４の一部（先端）は、ベゼル７０およびバックライトシャーシ４０を貫通して、位置決めピン４２の内部に収納させることができる。 A bezel 70 is provided in the liquid crystal display device 100 of the present embodiment. The bezel 70 is made of a metal material (for example, aluminum or iron), and is a frame member that holds and fixes the outer edge portion of the liquid crystal panel. In the configuration of the present embodiment, the bezel 70 is attached to the backlight chassis 40 in a state where the liquid crystal panel 10, the optical sheet 21, the light guide plate 30 and the light emitting element 35 are accommodated in the backlight chassis 40. In the bezel 70 of the present embodiment, a hole (through hole) 72 through which the screw 44 passes is formed. Accordingly, a part (tip) of the screw 44 can pass through the bezel 70 and the backlight chassis 40 and be accommodated in the positioning pin 42.
　次に、図２及び図３を追加して、本実施形態の構成についてさらに説明する。図２は、本実施形態のバックライトユニット５０における位置決めピン４２の周辺構造を模式的に示す分解斜視図である。また、図３は、位置決めピン４２の周辺構造を模式的に示す断面図である。 Next, the configuration of this embodiment will be further described with reference to FIGS. FIG. 2 is an exploded perspective view schematically showing the peripheral structure of the positioning pin 42 in the backlight unit 50 of the present embodiment. FIG. 3 is a cross-sectional view schematically showing the peripheral structure of the positioning pin 42.
　本実施形態の構成では、図２に示すように、導光板３０における凹部３２の開口部に位置決めピン４２を挿入する。その状態で、ベゼル７０及びバックライトシャーシ４０を貫通するように、ビス４４を位置決めピン４２にネジ締めする。すると、図３に示すように、ビス４４と位置決めピン４２との締結によって、ベゼル７０及びバックライトシャーシ４０を固定することができる。そして、位置決めピン４２によって導光板３０を固定することができる。 In the configuration of the present embodiment, as shown in FIG. 2, the positioning pin 42 is inserted into the opening of the recess 32 in the light guide plate 30. In this state, the screw 44 is screwed to the positioning pin 42 so as to penetrate the bezel 70 and the backlight chassis 40. Then, as shown in FIG. 3, the bezel 70 and the backlight chassis 40 can be fixed by fastening the screws 44 and the positioning pins 42. The light guide plate 30 can be fixed by the positioning pins 42.
　本実施形態のビス４４の貫通部位は、ネジ溝が形成されており、そして、ビス４４が矢印４５の方向に向かうように締めていくと、ビス４４の先端部分は、位置決めピン４２の開口部４２ａに収納される。また、図示した凹部３２はＵ字溝形状を有しており、位置決めピン４２の先端部分をＵ字溝３２の一部に接触するように、ビス４４を矢印４５の方向に押し込むことが可能である。本実施形態の構成では、このようなビス４４の押し込みによって、位置決めピン４２で導光板３０の微妙な位置合わせに対応することが容易になるという効果もある。また、ビス４４は、ベゼル７０をバックライトシャーシ４０に押し付けるように位置決めピン４２に固定されているので、液晶表示装置１００の狭額縁化を実行する上での技術的価値を有している。 A thread groove is formed in the penetration portion of the screw 44 of the present embodiment, and when the screw 44 is tightened so as to go in the direction of the arrow 45, the tip portion of the screw 44 is an opening portion of the positioning pin 42. 42a. The illustrated recess 32 has a U-shaped groove, and the screw 44 can be pushed in the direction of the arrow 45 so that the tip of the positioning pin 42 contacts a part of the U-shaped groove 32. is there. The configuration of the present embodiment also has an effect that it becomes easy to cope with the delicate alignment of the light guide plate 30 with the positioning pins 42 by pushing the screws 44 like this. Further, since the screw 44 is fixed to the positioning pin 42 so as to press the bezel 70 against the backlight chassis 40, the screw 44 has a technical value in executing the narrowing of the frame of the liquid crystal display device 100.
　図４は、比較例となるバックライトユニット１５０の構成を示す断面図である。図４に示した比較例のバックライトユニット１５０では、位置決め用の凹部１３２が形成された導光板１３０に対応して、樹脂モールド部材１４１によって形成された凸部１４２が配置されている。凸部１４２を含む樹脂モールド部材１４１は、バックライトシャーシ１４０の表面に形成されている。また、バックライトシャーシ１４０の外周にはベゼル１７０が位置している。図４に示した比較例では、バックライトシャーシ１４０の垂直方向（Ｚ方向）に延びるビス穴１４８が形成されており、このビス穴１４８にビス（不図示）を挿入することによってバックライトシャーシ１４０と他の部材（例えば、ベゼル１７０）との締結固定を実行する。 FIG. 4 is a cross-sectional view showing a configuration of a backlight unit 150 as a comparative example. In the backlight unit 150 of the comparative example shown in FIG. 4, the convex portion 142 formed by the resin mold member 141 is disposed corresponding to the light guide plate 130 in which the positioning concave portion 132 is formed. The resin mold member 141 including the convex portion 142 is formed on the surface of the backlight chassis 140. A bezel 170 is positioned on the outer periphery of the backlight chassis 140. In the comparative example shown in FIG. 4, a screw hole 148 extending in the vertical direction (Z direction) of the backlight chassis 140 is formed, and the backlight chassis 140 is inserted by inserting a screw (not shown) into the screw hole 148. And other members (for example, bezel 170) are fastened and fixed.
　図４に示した構成では、凸部１４２を有する樹脂モールド部材１４１を形成することによって、導光板１３０の位置決めを行うことが必要である。したがって、樹脂モールド部材１４１の作製工程が必要となるとともに、樹脂モールド部材１４１の作製にコストがかかる。また、導光板１３０の熱膨張・収縮を考慮すると、導光板１３０と樹脂モールド部材１４１との間に大きく隙間を設ける必要がある。したがって、図４に示した樹脂モールド部材１４１を用いた構成では、導光板１３０の端部からベゼル１７０の外面までの距離Ｌ２が長くなってしまい、それゆえに、狭額縁化を実行することが難しい。 In the configuration shown in FIG. 4, it is necessary to position the light guide plate 130 by forming the resin mold member 141 having the convex portions 142. Therefore, the manufacturing process of the resin mold member 141 is required, and the manufacturing of the resin mold member 141 is costly. In consideration of thermal expansion / contraction of the light guide plate 130, a large gap needs to be provided between the light guide plate 130 and the resin mold member 141. Therefore, in the configuration using the resin mold member 141 shown in FIG. 4, the distance L2 from the end portion of the light guide plate 130 to the outer surface of the bezel 170 becomes long, and therefore it is difficult to reduce the frame. .
　加えて、バックライトシャーシ１４０には、他の部材（例えば、ベゼル１７０）との締結固定をするためのビス穴１４８が設けられているので、このビス穴１４８の存在によっても、狭額縁化を実行することが難しくなる。なお、図８に示した構成（従来例）においては、樹脂モールド３４０の底面に複数の突起部３４３ａ、３４３ｂを設けて、収納ケース３６０の複数の開口部３６２ａ、３６２ｂに嵌合させている。その構成の場合には、図４に示したビス穴１４８の形成を省略することが可能であるが、今度は、複数の突起部３４３ａ、３４３ｂと、開口部３６２ａ、３６２ｂを作製する手間が発生する。 In addition, since the backlight chassis 140 is provided with a screw hole 148 for fastening and fixing to other members (for example, the bezel 170), the presence of the screw hole 148 reduces the frame. It becomes difficult to execute. In the configuration shown in FIG. 8 (conventional example), a plurality of protrusions 343 a and 343 b are provided on the bottom surface of the resin mold 340 and are fitted into the plurality of openings 362 a and 362 b of the storage case 360. In the case of such a configuration, it is possible to omit the formation of the screw hole 148 shown in FIG. 4, but this time, it takes time to produce a plurality of protrusions 343a and 343b and openings 362a and 362b. To do.
　本実施形態の構成によれば、導光板３０を収納するバックライトシャーシ４０に、導光板３０の凹部３２に対応した位置決めピン４２が設けられており、そして、位置決めピン４２には、バックライトシャーシ４０を貫通して延びるビス４４の一部が配置されている。したがって、バックライトシャーシ４０を貫通して延びるビス４４および位置決めピン４２によって簡単に導光板３０を固定することができる。 According to the configuration of the present embodiment, the backlight chassis 40 that houses the light guide plate 30 is provided with the positioning pins 42 corresponding to the recesses 32 of the light guide plate 30, and the positioning pins 42 include the backlight chassis. A part of a screw 44 extending through 40 is disposed. Therefore, the light guide plate 30 can be easily fixed by the screws 44 and the positioning pins 42 extending through the backlight chassis 40.
　また、図３に示すように、本実施形態の構成では、ビス４４および位置決めピン４２によって、導光板３０をバックライトシャーシ４０に固定することができ、そして、ベゼル７０をバックライトシャーシ４０に固定することができる。したがって、狭額縁化に適したバックライトユニット５０を実現することができる。すなわち、本実施形態の構成によれば、導光板３０と、位置決めピン４２を含むバックライトシャーシ４０との間の隙間を狭くすることができ、そして、図４に示したビス穴１４８の形成を省略することが可能である。その結果、図３に示した導光板３０の端部からベゼル７０の外面までの距離Ｌ１は、図４に示した距離Ｌ２よりも小さくすることができ、それゆえに、狭額縁化を容易にするバックライトユニット５０（または液晶表示装置１００）を実現することができる。 As shown in FIG. 3, in the configuration of the present embodiment, the light guide plate 30 can be fixed to the backlight chassis 40 by the screws 44 and the positioning pins 42, and the bezel 70 is fixed to the backlight chassis 40. can do. Therefore, the backlight unit 50 suitable for narrowing the frame can be realized. That is, according to the configuration of the present embodiment, the gap between the light guide plate 30 and the backlight chassis 40 including the positioning pins 42 can be narrowed, and the screw holes 148 shown in FIG. 4 are formed. It can be omitted. As a result, the distance L1 from the end of the light guide plate 30 shown in FIG. 3 to the outer surface of the bezel 70 can be made smaller than the distance L2 shown in FIG. 4, and therefore facilitates narrowing of the frame. The backlight unit 50 (or the liquid crystal display device 100) can be realized.
　次に、図５から図７を参照しながら、本実施形態のバックライトユニット５０または液晶表示装置１００の改変例について説明する。図５は、本実施形態の液晶表示装置１００の改変例の構成を模式的に示す分解斜視図である。また、図６は、改変例のバックライトユニット５０における位置決めピン４２の周辺構造を模式的に示す分解斜視図である。図７は、位置決めピン４２の周辺構造を模式的に示す断面図である。 Next, a modified example of the backlight unit 50 or the liquid crystal display device 100 of the present embodiment will be described with reference to FIGS. FIG. 5 is an exploded perspective view schematically showing a configuration of a modified example of the liquid crystal display device 100 of the present embodiment. FIG. 6 is an exploded perspective view schematically showing the peripheral structure of the positioning pin 42 in the modified backlight unit 50. FIG. 7 is a cross-sectional view schematically showing the peripheral structure of the positioning pin 42.
　図５に示した液晶表示装置１００では、ベゼル７０に加えて、光学シート２１（２１ａ～２１ｃ）を押さえつける樹脂シャーシ６０を備えている。樹脂シャーシ６０は、光学シート２１の外縁部を押さえて固定するフレーム部材であり、樹脂から構成されている。なお、樹脂以外の材料から構成されている場合は、例えば、光学シート保持用のシャーシ部材と称してもよい。液晶パネル１０は、樹脂シャーシ６０の上に配置されて、樹脂シャーシ６０は、光学シート２１および導光板３０を押さえつけた形態でバックライトシャーシ４０に収納される。 In addition to the bezel 70, the liquid crystal display device 100 shown in FIG. 5 includes a resin chassis 60 for pressing the optical sheets 21 (21a to 21c). The resin chassis 60 is a frame member that presses and fixes the outer edge of the optical sheet 21 and is made of resin. In addition, when comprised from materials other than resin, you may call the chassis member for optical sheet holding | maintenance, for example. The liquid crystal panel 10 is disposed on the resin chassis 60, and the resin chassis 60 is accommodated in the backlight chassis 40 in a form in which the optical sheet 21 and the light guide plate 30 are pressed.
　また、図５に示した例では、導光板３０の下には、反射シート３３が設けられている。この例では、バックライトシャーシ４０の底面の表面に反射シート３３が配置されている。なお、反射シート３３をバックライトシャーシ４０の底面の表面に配置せずに、導光板３０の裏面に、反射シート３３を貼り付けた形態にしても構わない。また、図５に示した改変例では、導光板３０の凹部３２の形状をＵ字溝以外の形状（矩形の溝）にしている。このように、導光板３０の凹部３２の形状を他の形状にしても構わない。 In the example shown in FIG. 5, a reflection sheet 33 is provided under the light guide plate 30. In this example, the reflection sheet 33 is disposed on the bottom surface of the backlight chassis 40. The reflective sheet 33 may be attached to the back surface of the light guide plate 30 without arranging the reflective sheet 33 on the bottom surface of the backlight chassis 40. Further, in the modified example shown in FIG. 5, the shape of the recess 32 of the light guide plate 30 is a shape other than the U-shaped groove (rectangular groove). In this way, the shape of the recess 32 of the light guide plate 30 may be other shapes.
　一方、図１に示した構成のように、導光板３０の凹部３２の形状をＵ字溝にすると、次のような効果を得ることができる。すなわち、Ｕ字溝の場合、矩形溝と比較して、溝（凹部３２）の面積（上面から見た面積）を小さくすることができる。導光板３０の外辺は刃物で加工されるところ、その際の加工面積が小さくなると作業時間の短縮を図ることができる。また、Ｕ字溝にした場合、矩形溝と比較して溝の幅を小さくすることができるので、同じ熱膨張率で導光板３０が伸縮するとしたときに、溝幅の伸縮量（絶対量）を小さくすることができる。 On the other hand, when the concave portion 32 of the light guide plate 30 has a U-shaped groove as in the configuration shown in FIG. 1, the following effects can be obtained. That is, in the case of the U-shaped groove, the area (area viewed from the upper surface) of the groove (recess 32) can be reduced as compared with the rectangular groove. When the outer side of the light guide plate 30 is processed with a blade, the working time can be reduced if the processing area at that time is reduced. In addition, when the U-shaped groove is used, the width of the groove can be made smaller than that of the rectangular groove. Therefore, when the light guide plate 30 expands and contracts with the same coefficient of thermal expansion, the expansion amount (absolute amount) of the groove width. Can be reduced.
　図６に示すように、この例では、導光板３０の凹部３２に対応した位置決めピン４２にビス４４を挿入する。具体的には、導光板３０の凹部３２に位置決めピン４２を挿入して、導光板３０を固定する。そして、ベゼル７０の貫通穴７２、樹脂シャーシ６０の貫通穴６２、および、バックライトシャーシ４０の貫通穴４６にビス４４を通すことによって、図７に示すように、ベゼル７０、樹脂シャーシ６０及びバックライトシャーシ４０を固定する。また、ビス４４の先端が挿入された位置決めピン４２によって、導光板３０をバックライトシャーシ４０に固定すること（または、位置決めすること）ができる。 As shown in FIG. 6, in this example, a screw 44 is inserted into the positioning pin 42 corresponding to the concave portion 32 of the light guide plate 30. Specifically, the positioning pin 42 is inserted into the recess 32 of the light guide plate 30 to fix the light guide plate 30. Then, by passing the screw 44 through the through hole 72 of the bezel 70, the through hole 62 of the resin chassis 60, and the through hole 46 of the backlight chassis 40, the bezel 70, the resin chassis 60, and the back as shown in FIG. The light chassis 40 is fixed. Further, the light guide plate 30 can be fixed (or positioned) to the backlight chassis 40 by the positioning pins 42 into which the tips of the screws 44 are inserted.
　図５等に示した構成においても、ビス４４および位置決めピン４２によって、導光板３０をバックライトシャーシ４０に固定することができ、そして、ベゼル７０及び樹脂シャーシ６０をバックライトシャーシ４０に固定することができる。したがって、狭額縁化に適したバックライトユニット５０を実現することができる。すなわち、ビス４４は、ベゼル７０及び樹脂シャーシ６０をバックライトシャーシ４０に押し付けるように位置決めピン４２に固定することができるので、液晶表示装置１００の狭額縁化を実行する上での技術的価値を有している。 5 and the like, the light guide plate 30 can be fixed to the backlight chassis 40 by the screws 44 and the positioning pins 42, and the bezel 70 and the resin chassis 60 are fixed to the backlight chassis 40. Can do. Therefore, the backlight unit 50 suitable for narrowing the frame can be realized. That is, since the screw 44 can be fixed to the positioning pin 42 so as to press the bezel 70 and the resin chassis 60 against the backlight chassis 40, the technical value in executing the narrowing of the frame of the liquid crystal display device 100 can be obtained. Have.
　なお、本実施形態の液晶表示装置１００においては、液晶パネル１０及び／又は発光素子（ＬＥＤ素子）３５の駆動を制御する制御装置（不図示）を含めることができる。そのような制御装置は、半導体集積回路からなる。本実施形態の制御装置は、液晶パネル駆動部およびＬＥＤ駆動部を含んでいる。液晶パネル駆動部は、液晶パネル１０を駆動することによって液晶パネル１０に画像を表示させる部位であり、ゲートドライバ、ソースドライバなどのドライバ回路に該当する。ＬＥＤ駆動部は、各ＬＥＤ素子３５を個別に点灯／消灯させたり、発光強度を変更させるための部位であり、例えばスイッチ等を含むドライバ回路によって構成されている。 In the liquid crystal display device 100 of the present embodiment, a control device (not shown) that controls the driving of the liquid crystal panel 10 and / or the light emitting element (LED element) 35 can be included. Such a control device comprises a semiconductor integrated circuit. The control device of the present embodiment includes a liquid crystal panel driving unit and an LED driving unit. The liquid crystal panel driving unit is a part that displays an image on the liquid crystal panel 10 by driving the liquid crystal panel 10, and corresponds to a driver circuit such as a gate driver or a source driver. The LED driving unit is a part for individually turning on / off each LED element 35 or changing the light emission intensity, and is configured by a driver circuit including, for example, a switch.
　また、本実施形態のＬＥＤ素子３５は、導光板３０に光を出射するように複数個配列されており、例えば白色ＬＥＤからなる。図１に示した例では、導光板３０の一辺にＬＥＤ素子３５を配列させたが、それに限らず、導光板３０の二辺又はそれ以上（例えば、三辺）にＬＥＤ素子３５を配列させることも可能である。また、図１に示した例の導光板３０の凹部３２は、２箇所に設けたが、それに限らず、３箇所に設けてもよいし、１箇所に設けてもよい。 Also, a plurality of the LED elements 35 of the present embodiment are arranged so as to emit light to the light guide plate 30, and are made of, for example, white LEDs. In the example shown in FIG. 1, the LED elements 35 are arranged on one side of the light guide plate 30, but not limited thereto, the LED elements 35 are arranged on two sides or more (for example, three sides) of the light guide plate 30. Is also possible. Moreover, although the recessed part 32 of the light-guide plate 30 of the example shown in FIG. 1 was provided in two places, it may not be restricted to it but may be provided in three places, and may be provided in one place.
　以上、本発明を好適な実施形態により説明してきたが、こうした記述は限定事項ではなく、勿論、種々の改変が可能である。例えば、上述した実施形態では、１枚の液晶パネル１０を用いて画像表示部を構成しているが、複数枚の液晶パネル１０を組み合わせて１つの画像表示部（マルチディスプレイ）を構成することも可能である。そのような複数枚の液晶パネル１０を組み合わせた液晶表示装置１００を、大画面のデジタルサイネージ（例えば、１００インチ以上の表示装置）の用途に使用することも可能である。 As mentioned above, although this invention has been demonstrated by suitable embodiment, such description is not a limitation matter and, of course, various modifications are possible. For example, in the above-described embodiment, the image display unit is configured by using one liquid crystal panel 10, but one image display unit (multi-display) may be configured by combining a plurality of liquid crystal panels 10. Is possible. The liquid crystal display device 100 in which such a plurality of liquid crystal panels 10 are combined can be used for a large-screen digital signage (for example, a display device of 100 inches or more).
　本発明によれば、簡単に導光板を固定することができるとともに、狭額縁化に適したバックライトユニットを提供することができる。 According to the present invention, a light guide plate can be easily fixed, and a backlight unit suitable for narrowing the frame can be provided.
 １０ 液晶パネル
 １１ アレイ基板
 １２ ＣＦ基板　
 １３ 偏光板
 ２１ａ～ｃ 光学シート
 ３０ 導光板
 ３０ａ 発光面（主面）
 ３１ 入光面
 ３２ 凹部
 ３３ 反射シート
 ３５ 発光素子（ＬＥＤ素子）
 ３７ 配線基板
 ４０ バックライトシャーシ
 ４２ 位置決めピン
 ４２ａ 開口部
 ４４ ビス
 ４６ 貫通穴
 ５０ バックライトユニット
 ６０ 樹脂シャーシ
 ６２ 貫通穴
 ７０ ベゼル
 ７２ 貫通穴
１００ 液晶表示装置
１０００ バックライト 10 Liquid crystal panel 11 Array substrate 12 CF substrate
13 Polarizing plate 21a to c Optical sheet 30 Light guide plate 30a Light emitting surface (main surface)
31 Light incident surface 32 Recessed portion 33 Reflective sheet 35 Light emitting element (LED element)
37 Wiring Board 40 Backlight Chassis 42 Positioning Pin 42a Opening 44 Screw 46 Through Hole 50 Backlight Unit 60 Resin Chassis 62 Through Hole 70 Bezel 72 Through Hole 100 Liquid Crystal Display Device 1000 Backlight

Claims (10)

  1. 　液晶パネルに光を照射するバックライトユニットであって、
    　発光素子と、
    　前記発光素子が発した光を前記液晶パネルに照射させる導光板と、
    　前記導光板を収納するバックライトシャーシと
    　を備え、
    　前記導光板の辺の少なくとも一部には、凹部が形成されており、
    　前記凹部に対応した位置決めピンが、前記バックライトシャーシに設けられており、
    　前記位置決めピンには、前記バックライトシャーシを貫通して延びるビスの一部が配置されている、バックライトユニット。     A backlight unit for irradiating light to a liquid crystal panel,
    A light emitting element;
    A light guide plate for irradiating the liquid crystal panel with light emitted from the light emitting element;
    A backlight chassis that houses the light guide plate,
    A recess is formed on at least a part of the side of the light guide plate,
    A positioning pin corresponding to the recess is provided in the backlight chassis,
    A backlight unit, wherein the positioning pin includes a part of a screw extending through the backlight chassis.
  2. 　前記位置決めピン及び前記ビスは、前記導光板の主面に対して平行に延びており、
    　前記位置決めピンは、内部に前記ビスが位置する開口部が形成された円柱形状を有する、請求項１に記載のバックライトユニット。     The positioning pins and the screws extend parallel to the main surface of the light guide plate,
    The backlight unit according to claim 1, wherein the positioning pin has a cylindrical shape in which an opening in which the screw is positioned is formed.
  3. 　前記発光素子は、発光ダイオード素子である、請求項１または２に記載のバックライトユニット。 The backlight unit according to claim 1, wherein the light emitting element is a light emitting diode element.
  4. 　前記発光素子は、冷陰極管である、請求項１または２に記載のバックライトユニット。 The backlight unit according to claim 1 or 2, wherein the light emitting element is a cold cathode tube.
  5. 　前記導光板の凹部は、Ｕ字溝の形状を有している、請求項１から４の何れか一つに記載のバックライトユニット。 The backlight unit according to any one of claims 1 to 4, wherein the concave portion of the light guide plate has a U-shaped groove shape.
  6. 　さらに、前記バックライトユニットは、前記液晶パネルの外縁部を押さえつけるベゼルを備えており、
    　前記ビスは、前記ベゼルおよび前記バックライトシャーシを貫通して前記位置決めピンに収納されている、請求項１から５の何れか一つに記載のバックライトユニット。     Furthermore, the backlight unit includes a bezel for pressing the outer edge of the liquid crystal panel,
    The backlight unit according to any one of claims 1 to 5, wherein the screw passes through the bezel and the backlight chassis and is stored in the positioning pin.
  7. 　前記ビスは、前記ベゼルを前記バックライトシャーシに押し付けるように前記位置決めピンに固定されている、請求項６に記載のバックライトユニット。 The backlight unit according to claim 6, wherein the screw is fixed to the positioning pin so as to press the bezel against the backlight chassis.
  8. 　さらに、前記バックライトユニットは、前記液晶パネルと前記導光板との間に光学シートを備えており、
    　前記バックライトユニットは、前記導光板および前記光学フィルムを押さえつける樹脂シャーシを備えており、
    　前記ビスは、前記ベゼル、前記樹脂シャーシおよび前記バックライトユニットを貫通して前記位置決めピンに収納されている、請求項６に記載のバックライトユニット。     Furthermore, the backlight unit includes an optical sheet between the liquid crystal panel and the light guide plate,
    The backlight unit includes a resin chassis that holds down the light guide plate and the optical film,
    The backlight unit according to claim 6, wherein the screw penetrates the bezel, the resin chassis, and the backlight unit and is stored in the positioning pin.
  9. 　前記ビスは、前記ベゼルおよび前記樹脂シャーシを前記バックライトシャーシに押し付けるように前記位置決めピンに固定されている、請求項８に記載のバックライトユニット。 The backlight unit according to claim 8, wherein the screw is fixed to the positioning pin so as to press the bezel and the resin chassis against the backlight chassis.
  10. 　請求項１から８の何れか一つに記載のバックライトユニットと、
    　前記バックライトユニットからの光が照射される液晶パネルと、
    　を備えた液晶表示装置。     The backlight unit according to any one of claims 1 to 8,
    A liquid crystal panel irradiated with light from the backlight unit;
    A liquid crystal display device.
PCT/JP2011/073187 2010-10-13 2011-10-07 Backlight unit and liquid crystal display device WO2012050052A1 (en)

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CN103438386A (en) * 2013-04-01 2013-12-11 友达光电股份有限公司 Light source device
WO2013189105A1 (en) * 2012-06-21 2013-12-27 深圳市华星光电技术有限公司 Backlight module and liquid crystal display device
CN107748466A (en) * 2017-11-14 2018-03-02 武汉华星光电技术有限公司 A kind of display module and display device
WO2018232790A1 (en) * 2017-06-23 2018-12-27 武汉华星光电技术有限公司 Backlight module and liquid crystal display module
US10185167B2 (en) 2017-06-23 2019-01-22 Wuhan China Star Optoelectronics Technology Co., Ltd. Backlight assembly and liquid crystal display assembly

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JP2010002745A (en) * 2008-06-20 2010-01-07 Hitachi Displays Ltd Liquid crystal display device

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JP2002042535A (en) * 2000-07-05 2002-02-08 Internatl Business Mach Corp <Ibm> Display device and surface light source device
JP2009049017A (en) * 2002-05-28 2009-03-05 Samsung Electronics Co Ltd Backlight assembly and liquid crystal display having this
JP2010002745A (en) * 2008-06-20 2010-01-07 Hitachi Displays Ltd Liquid crystal display device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013189105A1 (en) * 2012-06-21 2013-12-27 深圳市华星光电技术有限公司 Backlight module and liquid crystal display device
CN103438386A (en) * 2013-04-01 2013-12-11 友达光电股份有限公司 Light source device
WO2018232790A1 (en) * 2017-06-23 2018-12-27 武汉华星光电技术有限公司 Backlight module and liquid crystal display module
US10185167B2 (en) 2017-06-23 2019-01-22 Wuhan China Star Optoelectronics Technology Co., Ltd. Backlight assembly and liquid crystal display assembly
CN107748466A (en) * 2017-11-14 2018-03-02 武汉华星光电技术有限公司 A kind of display module and display device

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