WO2014005332A1 - 一种液晶显示装置用背板及液晶显示装置 - Google Patents

一种液晶显示装置用背板及液晶显示装置 Download PDF

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Publication number
WO2014005332A1
WO2014005332A1 PCT/CN2012/078333 CN2012078333W WO2014005332A1 WO 2014005332 A1 WO2014005332 A1 WO 2014005332A1 CN 2012078333 W CN2012078333 W CN 2012078333W WO 2014005332 A1 WO2014005332 A1 WO 2014005332A1
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WO
WIPO (PCT)
Prior art keywords
backplane
units
liquid crystal
crystal display
display device
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2012/078333
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English (en)
French (fr)
Inventor
陈仕祥
周革革
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Application filed by Shenzhen China Star Optoelectronics Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Technology Co Ltd
Priority to DE112012006491.7T priority Critical patent/DE112012006491B4/de
Priority to US13/577,727 priority patent/US8982298B2/en
Publication of WO2014005332A1 publication Critical patent/WO2014005332A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
    • G02B1/045—Light guides
    • 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
    • G02B6/0091—Positioning aspects of the light source relative to the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133314—Back frames
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/54—Arrangements for reducing warping-twist

Definitions

  • the present invention relates to the field of liquid crystal display, and more particularly to a back sheet for a liquid crystal display device and a liquid crystal display device.
  • the current mass-produced edge-lit liquid crystal display device requires a Light Guide Panel. Since the coupling distance between the backlight module light source and the light guide plate is relatively accurate, the installation of the light guide plate tends to adopt rigid positioning. However, the LED strip of the liquid crystal display device emits heat during operation, so that the light guide plate made of a polymer material such as PMMA or PC is heated and inflated. Since the positioning structure is not cushioned, the following problems may occur: First, the expansion and contraction amount of the light guide plate cannot be sufficiently absorbed, which may cause warpage and deformation of the light guide plate. Second, the light guide plate and the positioning structure are in rigid contact, and the light guide plate is easily broken when subjected to impact.
  • the light guide plate 2 is disposed in the back plate 1 , and part of the liquid crystal display device has an expansion gap specially reserved for the light guide plate 2 , so that there is a difference between the LED light bar 3 and the light guide plate 2 .
  • the large coupling distance reduces the efficiency of light entering.
  • the technical problem to be solved by the present invention is to provide a back sheet for a liquid crystal display device and a liquid crystal display device which do not reserve an expansion gap and have high light-in efficiency.
  • the technical solution of the present invention is: a backboard for a liquid crystal display device, comprising a side wall, the backboard includes at least two backplane units, and horizontal moving guides are disposed between adjacent backplane units, adjacent There are also elastic devices between the backboard units for elastically expanding and contracting the two backplane units.
  • the edges of the adjacent backboard units are vertically overlapped, and the horizontal movement guiding device comprises rivets and waist holes respectively disposed on the two backboard units, the rivets passing through the waist holes, two The backplane units are fixed up and down. Due to the use of a split-structure backplane, the overall strength of the backplane is usually reduced. However, the strength of the rivet and the waist-shaped hole of the present invention is high, and the overall strength of the backboard can be prevented from being significantly lowered.
  • the rivet and the waist hole are a plurality of, and the plurality of sets of rivets and the waist hole can reduce the friction between the backboard units and can smoothly expand and contract.
  • the horizontal movement guiding device comprises a guide post and a guide sleeve respectively disposed on the two backboard units, and the guide post is disposed in the guide sleeve to fix the two backboard units up and down.
  • the guide post can only move in the axial direction of the guide sleeve, that is, the two back panel units can only telescope in the vertical direction of the LED strip, and the guide post and the guide sleeve generally need to be arranged two or more, so that the back panel unit can be stretched and contracted smoothly.
  • the sliding, guide post and guide sleeve matching structure also has the advantages of high strength and easy realization.
  • the elastic device comprises a spring, and two ends of the spring are respectively disposed on the two backboard units.
  • the back plate unit is provided with a stud, the spring is provided with a pull hook, and the pull hook is hung on the stud; or the back plate unit is provided with a fixed stamping and fixing block.
  • the pull hook on the spring is hung on the fixed block.
  • the spring pull hook can be easily hung on the stud or fixed block for manual operation.
  • the number of the springs is plural. Used to prevent tilt between the two backplane units.
  • the horizontal movement guiding device comprises three sets of rivets and a waist hole
  • the elastic device comprises two springs, the springs are spaced between the three sets of rivets and the waist holes, so that the two back plate units can be The tension between them is more uniform.
  • the backboard unit is provided with a convex hull, and the spring is disposed inside the convex hull. Placing the spring inside the backing plate reduces the effect of the spring on other structural adjustments and makes the back panel look cleaner.
  • the present invention also discloses another technical solution: a liquid crystal display device comprising the above-mentioned back plate, LED light bar and light guide plate, wherein the LED light bar and the light guide plate are both disposed in the back plate, the LED The light bar is parallel to a pair of side walls of the backboard, and the backboard unit is relatively telescopically movable in a direction perpendicular to the LED light bar.
  • a liquid crystal display device comprising: a back plate, an LED light bar, and a light guide plate, wherein the back plate includes a side wall, and the back plate includes at least two back plate units, adjacent Horizontal moving guides are arranged between the backboard units, and adjacent backplane units are further arranged to make the two backplane units relatively a horizontal elastically stretchable elastic device, wherein the LED light bar and the light guide plate are disposed in the back plate, the LED light bar is parallel to a pair of side walls of the back plate, and the back plate unit is in a direction perpendicular to the LED light bar Moving upwardly and relatively telescopically, the edges of the adjacent backboard units are vertically overlapped, and the horizontal movement guiding device comprises rivets and waist-shaped holes respectively disposed on the two backboard units, the rivets passing through the waist-shaped holes,
  • the two backplane units are fixed up and down
  • the elastic device comprises a spring, and two ends of the spring are respectively disposed on the two backboard units
  • the back plate of the liquid crystal display device of the present invention has a split structure, and includes at least two back plate units, and horizontal moving guides are arranged between adjacent back plate units, so that the back plate unit is
  • the elastic device can be moved horizontally, that is, the entire back plate composed of the backboard unit can be expanded and contracted; and the adjacent backboard units are further provided with elastic devices for horizontally elastically stretching and contracting the two backboard units.
  • Set the tension, or the preset pressure when the back plate is not subjected to the external force in the horizontal direction, the size of the entire back plate is kept to a minimum under the action of the elastic device.
  • the horizontal direction of the back plate is elongated, so that at a certain level Length extension is achieved in one direction.
  • the liquid crystal display device of the invention is designed to be elastically expandable and contractible in a direction perpendicular to the LED light bar.
  • the back plate in the back plate absorbs heat and expands, the back plate is elongated by the thrust, and the thermal expansion of the light guide plate The amount is directly absorbed, thereby effectively preventing the warpage and deformation of the light guide plate.
  • the back plate is shortened under the action of the elastic device, and the coupling between the light guide plate and the LED light bar is always performed.
  • the light distance remains constant, essentially zero distance, ensuring a high light-in efficiency.
  • FIG. 1 is a schematic cross-sectional view showing the structure of a liquid crystal display device in the prior art
  • FIG. 2 is a schematic structural view of an embodiment of a liquid crystal display device according to the present invention.
  • FIG. 3 is a schematic cross-sectional view showing an embodiment of a liquid crystal display device of the present invention.
  • the present invention discloses a liquid crystal display device as a preferred embodiment of the liquid crystal display device of the present invention, as shown in FIGS. 2 and 3, including a back plate, a light guide plate 2 and an LED light bar 3, the LED light bar 3 and
  • the light guide plate 2 is disposed in the back plate
  • the back plate includes a side wall 14
  • the LED light bar 3 is parallel to the pair of side walls 14 of the back plate
  • the back plate includes at least two back plate units 11
  • a horizontal movement guiding device is disposed between the adjacent backboard units 11
  • elastic devices for elastically expanding and contracting the two back panel units 11 relative to each other are disposed between the adjacent backboard units 11
  • the backboard unit 11 can be
  • the LED strip 3 moves relative to the telescopic direction in a vertical direction.
  • the back plate of the liquid crystal display device of the present invention has a split structure, and includes at least two back plate units 11 , and horizontal moving guides are disposed between adjacent back plate units 11 so that the back plate units 11 can be relatively horizontally Moving, that is, the entire backplane formed by the backboard unit 11 can be expanded and contracted; and the adjacent backplane units 11 are further provided with elastic means for horizontally elastically expanding and contracting the two backplane units 11, and the elastic device generally has a preset Pulling force, or preset pressure, when the backboard is not subjected to an external force perpendicular to the horizontal direction of the LED strip, the entire back panel is kept to a minimum size under the action of the elastic device, and when subjected to an external force, the back panel is elongated horizontally. Thereby length stretching is achieved in a horizontal direction perpendicular to the LED strip.
  • the liquid crystal display device of the invention is designed to be elastically expandable and contractible in a direction perpendicular to the LED light bar.
  • the back plate in the back plate absorbs heat and expands, the back plate is elongated by the thrust, and the thermal expansion of the light guide plate The amount is directly absorbed, thereby effectively preventing the warpage and deformation of the light guide plate.
  • the back plate is shortened under the action of the elastic device, and the coupling between the light guide plate and the LED light bar is always performed.
  • the light distance remains constant, essentially zero distance, ensuring a high light-in efficiency.
  • the edges of the adjacent backboard units 11 are vertically overlapped, and the horizontal movement guiding device includes rivets 4 and waist holes 12 respectively disposed on the two backboard units 11, the rivets 4
  • the two back plate units 11 are fixed up and down, the length direction of the waist hole 12 and the LED light bar 3 vertical, since the rivet 4 can only move along the length direction of the waist hole 12, the two back plate units 11 can only telescope in the length direction of the waist hole 12, that is, only perpendicular to the LED light bar
  • the direction of the expansion and contraction is to control the coupling distance between the LED strip 3 and the light guide plate 2. Because the back plate of the split structure is adopted, the overall strength of the back plate is generally reduced.
  • the rivet 4 and the waist hole 12 of the present invention have high structural strength, which can prevent the overall strength of the back plate from being significantly reduced, and the present embodiment is provided with more
  • the set of rivets 4 and the waist holes 12, specifically three sets of rivets and waist holes, are distributed in the middle and both sides of the backboard unit 11, so that the friction between the backboard units 11 can be reduced, and the smoothness can be more smoothly Telescopic.
  • the elastic device includes a spring 5, and two ends of the spring 5 are respectively disposed on the two backboard units 11, and the backboard unit 11 is provided with a fixed block 15 integrally formed by stamping.
  • the spring 5 is provided with a pull hook 51.
  • the pull hook 51 on the spring is hung on the fixing block 15.
  • the spring 5 is pre-set with a certain pulling force.
  • the back plate is presented with a minimum size. The integral punching of the fixing block 15 on the backboard unit can reduce the manufacturing cost of the backboard unit 11, and the spring pull hook 51 can be conveniently hung on the fixing block 15 for manual operation.
  • the number of the springs 5 is plural, specifically two springs 5, which are symmetrically arranged, so that the side wall 14 of the backboard and the LED light bar 3 can be in parallel, preventing the two backboard units 11 from being in contact with each other.
  • the inclination is generated, and the springs 5 are spaced apart between the three sets of rivets 4 and the waist holes 12 to make the tension between the two back plate units 11 more uniform.
  • the backboard unit 11 is provided with a convex hull 13 , and the spring 5 is disposed inside the convex hull 13 . After the spring 5 is set, the main spring is not touched, and the spring 5 is placed. The effect of the spring 5 on other structural adjustments can be reduced inside the backing plate, and the appearance of the backing plate can be made cleaner.
  • the backplane unit 11 is three, and the backboard unit 11 at both ends can be extended and contracted with respect to the middle backplane unit 11, so that the LED strips 3 at both ends can be closely attached to the light guide plate 2, of course.
  • the same beneficial effects can be obtained by including only two backplane units or more than three backplane units.
  • the horizontal movement guiding device may further be a guide post and a guide sleeve respectively disposed on the two backboard units, the guide post is disposed in the guide sleeve, and the two backboard units are fixed up and down.
  • the axial direction of the guide post and the guide sleeve is perpendicular to the LED light bar, and the guide post can only move in the axial direction of the guide sleeve, that is, the two backs
  • the plate unit can only be telescoped in the vertical direction of the LED light bar.
  • the guide post and the guide bush generally need to be set with two sets or more, so that the back plate unit can be stretched and smoothed smoothly, and the guide post and the guide sleeve matching structure also have high strength and easyness.
  • the back plate unit does not need to integrally form the fixing block, but the riveting column is arranged, and the pull hook on the spring is hung on the stud column, and the purpose of tightening the two back plate units can also be achieved. .

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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)
  • Liquid Crystal (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Planar Illumination Modules (AREA)

Description

一种液晶显示装置用背板及液晶显示装置
【技术领域】
本发明属于液晶显示领域， 更具体的说， 涉及一种液晶显示装置用背板及 液晶显示装置。
【背景技术】
现行量产的侧光式液晶显示装置需要用到导光板 ( Light Guide Panel ) , 由 于背光模组光源与导光板之间的耦光距离要求比较精确， 故导光板的安装都倾 向于采用刚性定位， 然而液晶显示装置的 LED灯条在工作时会散发热量， 使由 PMMA、 PC等高分子材料制成的导光板升温并热胀， 由于定位结构不具有緩沖 性， 由此可能引发如下问题： 一是导光板的胀缩量无法被充分吸收， 易引起导 光板的翘曲、 变形； 二是导光板与定位结构为刚性接触， 受到撞击时容易导致 导光板破裂。
为了解决上述问题， 如图 1所示， 导光板 2设置在背板 1内， 部分液晶显 示装置特别为导光板 2预留有膨胀间隙， 这样 LED灯条 3和导光板 2之间就存 在较大的耦光距离， 入光效率下降。
【发明内容】
本发明所要解决的技术问题是提供一种不预留膨胀间隙、 入光效率高的液 晶显示装置用背板及液晶显示装置。
本发明的技术方案为： 一种液晶显示装置用背板， 包括侧壁， 所述背板至 少包括两个背板单元， 相邻的背板单元之间设有水平移动导向装置， 相邻的背 板单元之间还设有使两背板单元相对水平弹性伸缩的弹性装置。
优选的， 所述相邻的背板单元的边缘上下重合， 所述水平移动导向装置包 括分别设置在两个背板单元上的铆釘和腰形孔， 所述铆釘穿过腰形孔， 把两个 背板单元上下固定。 由于采用了分体式结构的背板， 通常会降低背板的整体强 度， 但本发明铆釘和腰形孔配合结构强度高， 可以防止背板整体强度明显下降。 优选的， 所述铆釘和腰形孔为多个， 多组铆釘和腰形孔可以使背板单元之 间减小摩擦力， 能更顺滑地伸缩。
优选的， 所述水平移动导向装置包括分别设置在两个背板单元上的导柱和 导套， 所述导柱设置在导套内， 把两个背板单元上下固定。 导柱只能在导套的 轴线方向移动， 即两背板单元只能在 LED灯条的垂直方向伸缩， 导柱和导套一 般需要设置两套及以上， 以便使背板单元之间伸缩顺滑， 导柱和导套配合结构 同样具有强度高、 易实现的优点。
优选的， 所述弹性装置包括弹簧， 所述弹簧的两端分别设置在两个背板单 元上。
优选的， 所述背板单元上设有铆柱， 所述弹簧上设有拉勾， 所述拉勾挂在 铆柱上； 或者所述背板单元上设有一体沖压成型的固定块， 所述弹簧上的拉勾 挂在固定块上。 弹簧的拉勾则能很方便地挂在铆柱或固定块上， 方便人工操作。
优选的， 所述弹簧数量为多个。 用于防止两个背板单元之间产生倾斜。 优选的， 所述水平移动导向装置包括三组铆釘和腰形孔， 所述弹性装置包 括两个弹簧， 所述弹簧间隔分布在三组铆釘和腰形孔之间， 可使两个背板单元 之间的拉力更均匀。
优选的， 所述背板单元上设有凸包， 所述弹簧设置在凸包内部。 把弹簧放 置在背板内部可以减小弹簧对其它结构调整的影响， 而且使背板的外观更整洁。
本发明还公开了另一种技术方案： 一种液晶显示装置， 包括上面所述的背 板、 LED灯条和导光板， 所述 LED灯条和导光板均设置在背板内， 所述 LED 灯条平行于背板的一对侧壁， 所述背板单元在与 LED灯条垂直的方向上相对伸 缩移动。
本发明另一种技术方案为： 一种液晶显示装置， 包括： 背板、 LED灯条和 导光板， 所述背板包括侧壁， 所述背板至少包括两个背板单元， 相邻的背板单 元之间设有水平移动导向装置， 相邻的背板单元之间还设有使两背板单元相对 水平弹性伸缩的弹性装置， 所述 LED灯条和导光板均设置在背板内， 所述 LED 灯条平行于背板的一对侧壁， 所述背板单元在与 LED灯条垂直的方向上相对伸 缩移动， 所述相邻的背板单元的边缘上下重合， 所述水平移动导向装置包括分 别设置在两个背板单元上的铆釘和腰形孔， 所述铆釘穿过腰形孔， 把两个背板 单元上下固定， 所述弹性装置包括弹簧， 所述弹簧的两端分别设置在两个背板 单元上， 所述背板单元上设有一体沖压成型的固定块， 所述弹簧上设有拉勾， 所述拉勾挂在固定块上， 所述水平移动导向装置包括三组铆釘和腰形孔， 所述 弹性装置包括两个弹簧， 所述弹簧间隔分布在三组铆釘和腰形孔之间， 所述背 板单元上设有凸包， 所述弹簧设置在凸包内部。
本发明的有益效果为： 本发明所述液晶显示装置用背板为分体式结构， 至 少包括两个背板单元， 相邻的背板单元之间设有水平移动导向装置， 使背板单 元之间可以相对水平移动， 即背板单元组成的整个背板的尺寸可以伸缩； 相邻 的背板单元之间还设有使两背板单元水平弹性伸缩的弹性装置， 所述弹性装置 一般有预设拉力， 或预设压力， 背板没有受到水平方向的外力时， 整个背板在 弹性装置的作用下尺寸保持最小， 当受到外力时， 背板水平方向就会伸长， 从 而在水平的某一方向上实现长度伸缩。
本发明液晶显示装置把背板在与 LED 灯条垂直的方向上设计成可弹性伸 缩， 当背板内导光板的吸收热量而膨胀时， 背板就受推力而伸长， 导光板的热 胀量直接被吸收， 从而有效防止了导光板的翘曲、 变形， 当导光板的温度下降 而收缩时， 背板就在弹性装置的作用下缩短， 始终使导光板和 LED灯条之间的 耦光距离保持不变， 基本上为零距离， 保证了较高的入光效率。
【附图说明】
图 1是现有技术中液晶显示装置的结构剖面示意图；
图 2是本发明所述液晶显示装置实施例的结构示意图；
图 3是本发明所述液晶显示装置实施例的剖面示意图。 其中： 1、 背板； 11、 背板单元； 12、 腰形孔； 13、 凸包； 14、 侧壁； 15、 固定块； 2、 导光板； 3、 LED灯条； 4、 铆釘； 5、 弹簧； 51、 拉勾。
【具体实施方式】
本发明公开一种液晶显示装置， 作为本发明液晶显示装置的最佳实施例， 如图 2和图 3所示， 包括背板、 导光板 2和 LED灯条 3, 所述 LED灯条 3和导 光板 2均设置在背板内， 所述背板包括侧壁 14, 所述 LED灯条 3平行于背板的 一对侧壁 14, 所述背板至少包括两个背板单元 11 , 相邻的背板单元 11之间设 有水平移动导向装置， 相邻的背板单元 11之间还设有使两背板单元 11相对水 平弹性伸缩的弹性装置，所述背板单元 11可在与 LED灯条 3垂直的方向上相对 伸缩移动。
本发明所述液晶显示装置用背板为分体式结构，至少包括两个背板单元 11 , 相邻的背板单元 11之间设有水平移动导向装置， 使背板单元 11之间可以相对 水平移动， 即背板单元 11组成的整个背板的尺寸可以伸缩； 相邻的背板单元 11 之间还设有使两背板单元 11水平弹性伸缩的弹性装置， 所述弹性装置一般有预 设拉力， 或预设压力， 背板没有受到垂直于 LED灯条的水平方向的外力时， 整 个背板在弹性装置的作用下尺寸保持最小， 当受到外力时， 背板水平方向就会 伸长， 从而在垂直于 LED灯条的水平方向上实现长度伸缩。
本发明液晶显示装置把背板在与 LED 灯条垂直的方向上设计成可弹性伸 缩， 当背板内导光板的吸收热量而膨胀时， 背板就受推力而伸长， 导光板的热 胀量直接被吸收， 从而有效防止了导光板的翘曲、 变形， 当导光板的温度下降 而收缩时， 背板就在弹性装置的作用下缩短， 始终使导光板和 LED灯条之间的 耦光距离保持不变， 基本上为零距离， 保证了较高的入光效率。
在本实施例中， 所述相邻的背板单元 11的边缘上下重合， 所述水平移动导 向装置包括分别设置在两个背板单元 11上的铆釘 4和腰形孔 12,所述铆釘 4穿 过腰形孔 12, 把两个背板单元 11上下固定， 腰形孔 12的长度方向与 LED灯条 3垂直， 由于铆釘 4只能沿着腰形孔 12的长度方向上移动， 所以两个背板单元 11也只能在腰形孔 12的长度方向上伸缩， 即只能在与 LED灯条垂直的方向上 伸缩， 以控制 LED灯条 3与导光板 2之间的耦光距离。 由于采用了分体式结构 的背板， 通常会降低背板的整体强度， 但本发明铆釘 4和腰形孔 12配合结构强 度高， 可以防止背板整体强度明显下降， 而且本实施例设置了多组铆釘 4和腰 形孔 12, 具体为三组铆釘和腰形孔， 分布在背板单元 11在中间和两侧部位， 可 以使背板单元 11之间减小摩擦力， 能更顺滑地伸缩。
本实施例中，所述弹性装置包括弹簧 5 ,所述弹簧 5的两端分别设置在两个 背板单元 11上， 所述背板单元 11上设有一体沖压成型的固定块 15, 所述弹簧 5上设有拉勾 51 , 所述弹簧上的拉勾 51挂在固定块 15上， 所述弹簧 5预设有 一定的拉力， 未安装导光板 2 时， 使背板呈现最小尺寸， 在背板单元上一体沖 压出固定块 15可以降低背板单元 11的制造成本， 弹簧的拉勾 51则能 4艮方便地 挂在固定块 15上， 方便人工操作。
本实施例中， 所述弹簧 5数量为多个， 具体为两个弹簧 5, 对称设置， 使背 板的侧壁 14和 LED灯条 3能平行贴紧， 防止两个背板单元 11之间产生倾斜， 所述弹簧 5间隔分布在三组铆釘 4和腰形孔 12之间， 使两个背板单元 11之间 的拉力更均匀。
本实施例中， 所述背板单元 11上设有凸包 13 , 所述弹簧 5设置在凸包 13 内部， 因为弹簧 5设置完毕后， 一般不会再去主触碰它， 把弹簧 5放置在背板 内部可以减小弹簧 5对其它结构调整的影响， 而且使背板的外观更整洁。
本实施例中， 所述背板单元 11为三块， 两端的背板单元 11可相对中间的 背板单元 11伸缩，使两端的 LED灯条 3都能与导光板 2紧密贴合， 当然也可为 只包括二块背板单元或三块以上的背板单元， 能获得相同的有益效果。
在上这实施例中， 所述水平移动导向装置还可以为分别设置在两个背板单 元上的导柱和导套， 所述导柱设置在导套内， 把两个背板单元上下固定， 导柱 和导套的轴线方向与 LED灯条垂直， 导柱只能在导套的轴线方向移动， 即两背 板单元只能在 LED灯条的垂直方向伸缩，导柱和导套一般需要设置两套及以上， 以便使背板单元之间伸缩顺滑， 导柱和导套配合结构同样具有强度高、 易实现 的优点。
在上这实施例中， 所述背板单元上可以不必一体成型出固定块， 而是设置 铆柱， 把弹簧上的拉勾挂在铆柱上， 同样能实现拉紧两背板单元的目的。
以上内容是结合具体的优选实施方式对本发明所作的进一步详细说明， 不 能认定本发明的具体实施只局限于这些说明。 对于本发明所属技术领域的普通 技术人员来说， 在不脱离本发明构思的前提下， 还可以做出若干筒单推演或替 换， 都应当视为属于本发明的保护范围。

Claims

权利要求
1、一种液晶显示装置用背板， 包括侧壁， 所述背板至少包括两个背板单元， 相邻的背板单元之间设有水平移动导向装置， 相邻的背板单元之间还设有使两 背板单元相对水平弹性伸缩的弹性装置。
2、 如权利要求 1所述的液晶显示装置用背板， 其中， 所述相邻的背板单元 的边缘上下重合， 所述水平移动导向装置包括分别设置在两个背板单元上的铆 釘和腰形孔， 所述铆釘穿过腰形孔， 把两个背板单元上下固定。
3、 如权利要求 2所述的液晶显示装置用背板， 其中， 所述铆釘和腰形孔为 多个。
4、 如权利要求 1所述的液晶显示装置用背板， 其中， 所述水平移动导向装 置包括分别设置在两个背板单元上的导柱和导套， 所述导柱设置在导套内， 把 两个背板单元上下固定。
5、 如权利要求 1所述的液晶显示装置用背板， 其中， 所述弹性装置包括弹 簧， 所述弹簧的两端分别设置在两个背板单元上。
6、 如权利要求 5所述的液晶显示装置用背板， 其中， 所述背板单元上设有 铆柱， 所述弹簧上设有拉勾， 所述拉勾挂在铆柱上； 或者所述背板单元上设有 一体沖压成型的固定块， 所述弹簧上的拉勾挂在固定块上。
7、如权利要求 5所述的液晶显示装置用背板， 其中， 所述弹簧数量为多个。
8、 如权利要求 7所述的液晶显示装置用背板， 其中， 所述水平移动导向装 置包括三组铆釘和腰形孔， 所述弹性装置包括两个弹簧， 所述弹簧间隔分布在 三组铆釘和腰形孔之间。
9、 如权利要求 6所述的液晶显示装置用背板， 其中， 所述背板单元上设有 凸包， 所述弹簧设置在凸包内部。
10、 一种液晶显示装置， 包括： 背板、 LED灯条和导光板， 所述背板包括 侧壁， 所述背板至少包括两个背板单元， 相邻的背板单元之间设有水平移动导 向装置， 相邻的背板单元之间还设有使两背板单元相对水平弹性伸缩的弹性装 置，所述 LED灯条和导光板均设置在背板内，所述 LED灯条平行于背板的一对 侧壁， 所述背板单元在与 LED灯条垂直的方向上相对伸缩移动， 所述相邻的背 板单元的边缘上下重合， 所述水平移动导向装置包括分别设置在两个背板单元 上的铆釘和腰形孔， 所述铆釘穿过腰形孔， 把两个背板单元上下固定， 所述弹 性装置包括弹簧， 所述弹簧的两端分别设置在两个背板单元上， 所述背板单元 上设有一体沖压成型的固定块， 所述弹簧上设有拉勾， 所述拉勾挂在固定块上， 所述水平移动导向装置包括三组铆釘和腰形孔， 所述弹性装置包括两个弹簧， 所述弹簧间隔分布在三组铆釘和腰形孔之间， 所述背板单元上设有凸包， 所述 弹簧设置在凸包内部。
11、 一种液晶显示装置， 包括： 背板、 LED 灯条和导光板， 所述背板包括 侧壁， 所述背板至少包括两个背板单元， 相邻的背板单元之间设有水平移动导 向装置， 相邻的背板单元之间还设有使两背板单元相对水平弹性伸缩的弹性装 置，所述 LED灯条和导光板均设置在背板内，所述 LED灯条平行于背板的一对 侧壁， 所述背板单元在与 LED灯条垂直的方向上相对伸缩移动。
12、 如权利要求 11所述的液晶显示装置， 其中， 所述相邻的背板单元的边 缘上下重合， 所述水平移动导向装置包括分别设置在两个背板单元上的铆釘和 腰形孔， 所述铆釘穿过腰形孔， 把两个背板单元上下固定。
13、如权利要求 12所述的液晶显示装置， 其中， 所述铆釘和腰形孔为多个。
14、 如权利要求 11所述的液晶显示装置， 其中， 所述水平移动导向装置包 括分别设置在两个背板单元上的导柱和导套， 所述导柱设置在导套内， 把两个 背板单元上下固定。
15、 如权利要求 11所述的液晶显示装置， 其中， 所述弹性装置包括弹簧， 所述弹簧的两端分别设置在两个背板单元上。
16、如权利要求 15所述的液晶显示装置， 其中， 所述背板单元上设有铆柱， 所述弹簧上设有拉勾， 所述拉勾挂在铆柱上； 或者所述背板单元上设有一体沖 压成型的固定块， 所述弹簧上的拉勾挂在固定块上。
17、 如权利要求 15所述的液晶显示装置， 其中， 所述弹簧数量为多个。
18、 如权利要求 17所述的液晶显示装置， 其中， 所述水平移动导向装置包 括三组铆釘和腰形孔， 所述弹性装置包括两个弹簧， 所述弹簧间隔分布在三组 铆釘和腰形孔之间。
19、如权利要求 16所述的液晶显示装置， 其中， 所述背板单元上设有凸包， 所述弹簧设置在凸包内部。
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