WO2013120284A1 - 一种侧光式背光模组及液晶显示装置 - Google Patents

一种侧光式背光模组及液晶显示装置 Download PDF

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Publication number
WO2013120284A1
WO2013120284A1 PCT/CN2012/071701 CN2012071701W WO2013120284A1 WO 2013120284 A1 WO2013120284 A1 WO 2013120284A1 CN 2012071701 W CN2012071701 W CN 2012071701W WO 2013120284 A1 WO2013120284 A1 WO 2013120284A1
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WO
WIPO (PCT)
Prior art keywords
light guide
guide plate
positioning
backlight module
edge
Prior art date
Application number
PCT/CN2012/071701
Other languages
English (en)
French (fr)
Inventor
张彦学
Original Assignee
深圳市华星光电技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳市华星光电技术有限公司 filed Critical 深圳市华星光电技术有限公司
Priority to US13/496,943 priority Critical patent/US8749730B2/en
Publication of WO2013120284A1 publication Critical patent/WO2013120284A1/zh

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Classifications

    • 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
    • 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
    • G02B6/0093—Means for protecting 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
    • G02F1/1335—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

Definitions

  • the invention belongs to the field of liquid crystal display, and more particularly to an edge-lit backlight module and a liquid crystal display device.
  • the current mass production of the edge-lit backlight module requires the use of a Light Guide Panel. Since the backlight distance between the backlight module light source and the light guide plate is relatively accurate, the installation of the light guide plate tends to be rigid. Positioning column positioning or right-angle positioning edge, however, the backlight module light source will dissipate heat during operation, causing the light guide plate to heat up and rise. Since the positioning post and the right-angle positioning edge are made of rigid material, there is no cushioning property, which may cause The following problems are as follows: First, the amount of expansion and contraction of the light guide plate cannot be fully absorbed, which may cause warpage and deformation of the light guide plate. Second, the light guide plate is in rigid contact with the positioning structure, and the light guide plate is easily broken when subjected to impact.
  • the technical problem to be solved by the present invention is to provide an edge-lit backlight module and a liquid crystal display device, wherein the light guide plate positioning structure can accurately ensure the light-distance distance between the backlight module light source and the light guide plate, and can fully Absorb the amount of expansion and contraction of the light guide plate.
  • an edge-lit backlight module comprising: a light guide plate and a positioning member for positioning the light guide plate, wherein the light guide plate is rigidly positioned in a direction toward the light source, and is buffered in the remaining direction. Positioning.
  • an angle of the light guide plate near the light source is rigidly positioned in the X direction, rigidly positioned or buffered in the Y direction, and the remaining corners are buffered and positioned in the X direction and the Y direction, wherein, in the light guide plate In the plane, the direction perpendicular to the light incident surface of the light guide plate is the X direction, and the direction parallel to the light incident surface is the Y direction.
  • the light guide plate is provided with a notch at a corner of the rigid positioning, and the corresponding notch on the positioning member A positioning post is provided, the positioning post being rigidly positioned in both the X and Y directions.
  • the use of the positioning post and the provision of the notch on the light guide plate is because the position space close to the light source is very limited, and the space occupancy of the solution is small, and the volume of the backlight module can be reduced as much as possible.
  • the remaining directions are buffered and positioned by the buffering member, and the buffering member comprises two right-angled sides, and the two right-angled edges are respectively attached to the two outer sides of the corresponding corners of the light guide plate.
  • the buffering member comprises two right-angled sides, and the two right-angled edges are respectively attached to the two outer sides of the corresponding corners of the light guide plate.
  • the remaining directions are buffered and positioned by the positioning post, and the positioning post for buffering positioning is sleeved with an elastic plastic capsule.
  • the elastic capsule can provide a certain buffer space by virtue of its own elasticity.
  • the remaining direction portion is buffered and positioned by the buffering member
  • the buffering member includes two right-angled sides, and the two right-angled edges are respectively attached to the two outer side surfaces of the corresponding corners of the light guide plate, and the portion is buffered and positioned by the positioning column, and the buffering member is used for buffering and positioning.
  • the cushioning positioning positioning rod is provided with an elastic plastic capsule.
  • the side of the elastic capsule is toothed.
  • the elastic plastic capsule with a toothed outer side has a larger buffer space and can sufficiently absorb the amount of expansion and contraction of the light guide plate.
  • the inner side surface of the right angle side of the cushioning member is toothed.
  • the toothed buffer surface can reduce the contact area between the two right angle sides and the light guide plate without reducing the positioning length, thereby obtaining a buffering effect.
  • the buffering member is further provided with a groove in a direction away from the right angle surface of the side surface of the light guide plate and away from the light guide plate, and the direction of the groove is parallel to the side of the light guide plate.
  • the grooves provide a greater cushioning margin and are further deformed to increase the cushioning effect when the amount of expansion or the tolerance of the light guide is greater than the tolerance of the toothed buffer surface.
  • the cushioning member and the positioning member are integrally formed.
  • the buffering member and the positioning member are separated structures, and the positioning member is provided with a positioning post.
  • the corresponding position of the buffering member is provided with a positioning hole, and the positioning column is sleeved in the positioning hole to fix the buffering member.
  • the buffer member is further provided with a light guide plate bearing surface, and the light guide plate bearing surface and the two right angle sides of the buffer member are perpendicular to each other.
  • the light guide plate bearing surface can prevent the light guide plate from sinking while protecting the light guide plate.
  • the positioning member is a back plate or a rear frame.
  • the light incident surface of the light guide plate is assembled with the light source with zero gap.
  • Light entrance surface and light of the light guide plate The smaller the gap of the source is, the better the coupling effect is.
  • the gap is preferably zero, and the amount of expansion of the light guide plate can be completely absorbed by other directions.
  • the present invention also discloses a liquid crystal display device, comprising: an edge-lit backlight module, the edge-lit backlight module includes a light guide plate and a positioning member for positioning the light guide plate, wherein the light guide plate faces the light source The upper is rigidly positioned and buffered in the remaining directions.
  • an angle of the light guide plate near the light source is rigidly positioned in the X direction, rigidly positioned or buffered in the Y direction, and the remaining corners are buffered and positioned in the X direction and the Y direction, wherein, in the light guide plate In the plane, the direction perpendicular to the light incident surface of the light guide plate is the X direction, and the direction parallel to the light incident surface is the Y direction.
  • the light guide plate is provided with a notch at a corner of the rigid positioning, and a positioning post is disposed on the corresponding notch on the positioning member, and the positioning post is rigidly positioned in both the X direction and the Y direction.
  • the remaining directions are buffered and positioned by the buffering member, and the buffering member comprises two right-angled sides, and the two right-angled edges are respectively attached to the two outer sides of the corresponding corners of the light guide plate.
  • the remaining direction portion is buffered and positioned by the buffering member
  • the buffering member includes two right-angled sides, and the two right-angled edges are respectively attached to the two outer side surfaces of the corresponding corners of the light guide plate, and the portion is buffered and positioned by the positioning column, and the buffering member is used for buffering and positioning.
  • the cushioning positioning positioning rod is provided with an elastic plastic capsule.
  • the inner side surface of the right angle side of the cushioning member is toothed.
  • the buffering member is further provided with a groove in a direction away from the right angle surface of the side surface of the light guide plate and away from the light guide plate, and the direction of the groove is parallel to the side of the light guide plate.
  • the buffering member and the positioning member are separated structures, and the positioning member is provided with a positioning post.
  • the corresponding position of the buffering member is provided with a positioning hole, and the positioning column is sleeved in the positioning hole to fix the buffering member.
  • the beneficial effects of the present invention are as follows:
  • the edge-lit backlight module and the liquid crystal display device of the present invention adopt a new light guide plate positioning structure, which is rigidly positioned in the direction of the light guide plate toward the light source, and is performed in the remaining direction.
  • Buffer positioning because the light guide plate is rigidly positioned in the direction toward the light source, the light distance between the light guide plate and the side light type backlight module light source can be controlled to obtain a better light guiding effect; and in the remaining direction Buffer positioning to absorb the amount of light guide plate shrinkage, avoiding the light guide plate Warping and deformation; at the same time, it can also avoid the rigid contact between the light guide plate and the positioning structure when the impact is caused, causing the light guide plate to rupture.
  • FIG. 1 is a schematic view showing the rigid positioning of a positioning column of an edge-lit backlight module of the present invention
  • FIG. 2 is a schematic view showing the buffer positioning of the positioning column of the edge-lit backlight module of the present invention
  • FIG. 3 is a schematic view showing two right-angle buffering positioning structures of the buffer member of the edge-lit backlight module of the present invention.
  • FIG. 4 is a schematic structural view of the buffering member of the present invention.
  • the present invention discloses an edge-lit backlight module and a liquid crystal display device.
  • the liquid crystal display device includes an edge-lit backlight module.
  • As an embodiment of the edge-lit backlight module of the present invention as shown in FIGS.
  • the edge-lit backlight module includes a light guide plate 1 and a positioning member for positioning the light guide plate 1.
  • the light guide plate 1 is rigidly positioned in a direction toward the light source and buffered in the remaining directions.
  • the edge-lit backlight module and the liquid crystal display device of the present invention adopt a new light guide plate positioning structure, which is rigidly positioned in the direction toward the light source of the light guide plate 1 and buffered in the remaining direction, due to the light guide plate 1 rigid positioning in the direction of the light source, can control the light-distance distance between the light guide plate and the light source of the edge-lit backlight module to obtain a better light guiding effect; and buffer positioning in the remaining direction for absorption
  • the amount of expansion and contraction of the light guide plate avoids warpage and deformation of the light guide plate 1; at the same time, it can also avoid the rigid contact between the light guide plate 1 and the positioning structure when the impact is caused, thereby causing the light guide plate to be broken.
  • the gap between the light incident surface of the light guide plate 1 and the light source the better the light coupling effect is, and the gap is preferably zero.
  • the light incident surface of the light guide plate 1 and the light source can be assembled with zero gap, and the amount of expansion of the light guide plate 1 can be completely absorbed by other directions.
  • the positioning member is a back plate 5, and the light guide plate 1 is positioned on the back plate 5, and the light guide plate 1 is A notch is provided at a corner that is rigidly positioned, and a positioning post is disposed on the corresponding notch on the back plate 5, and the positioning post is rigidly positioned in the X direction and the Y direction, and the remaining angles are in the X direction and the Y direction. Both are buffered and positioned.
  • a direction perpendicular to the light incident surface of the light guide plate is an X direction
  • a direction parallel to the light incident surface is a Y direction.
  • the positioning post 2 is accurately positioned rigidly at one corner of the light guide plate 1. Therefore, the angle is accurately positioned in the X direction, and the zero assembly gap positioning can be specifically used to control the light guide plate 1 and the edge light backlight.
  • the remaining corners of the light guide plate 1 adopt a buffer positioning structure in the X direction and the Y direction, so as to absorb the expansion and contraction of the light guide plate, and avoid the light guide plate Warpage and deformation; at the same time, it can also avoid the rigid contact between the light guide plate 1 and the positioning structure when the impact is caused, causing the light guide plate 1 to rupture. Since the positioning structure of the light guide plate of the embodiment adopts an accurate rigid positioning and a triangular buffer positioning, the light guide plate 1 is also very easy to install.
  • the remaining direction portion is buffered and positioned by the buffering member 4.
  • the buffering member 4 includes two right-angled sides 41, and the two right-angled edges 41 are respectively attached to the corresponding two outer side surfaces of the light guide plate 1, and the portion is buffered by the positioning column. Positioning. As shown in FIG. 2, the positioning post for buffer positioning is sleeved with an elastic plastic capsule 3, the side of the elastic plastic capsule 3 is toothed, and the material of the elastic plastic capsule 3 is rubber or silica gel, and may also be Other elastic materials.
  • the elastic plastic capsule 3 can provide a certain buffer space by virtue of its own elasticity, and the elastic plastic capsule 3 having a tooth shape on the outer side surface has a larger buffer space, and can fully absorb the expansion and contraction amount of the light guide plate 1, and the outer surface of the elastic plastic capsule 3 is specific.
  • the tooth shape can be freely selected, and may be a shape such as a semi-circular shape or a rectangle, and is not limited to the embodiment.
  • the two corners of the light guide plate 1 away from the light source are buffered and positioned by the buffering member 4, and the surface contact positioning is adopted, and the light guide plate 1 is not required to be processed, and does not appear on the light guide plate. 1 A decrease in optical quality caused by opening a notch.
  • the buffering member 4 and the backing plate 5 are in a separate structure, and the backing plate 5 is provided with a positioning post.
  • the buffering member 4 is provided with a positioning hole corresponding to the position, and the positioning post is sleeved in the positioning hole to fix the buffering member 4.
  • the inner side surface of the right angle side 41 of the cushioning member 4 is toothed to form a toothed buffer surface 42.
  • the toothed buffer surface 42 on the two right angle sides 41 of the cushioning member 4 can be reduced without reducing the positioning length.
  • the contact area between the two right-angled sides 41 and the light guide plate 1 is reduced to obtain a cushioning effect, and the specific tooth shape of the tooth-shaped buffer surface 42 can be freely selected, such as a semi-arc shape or a rectangular shape, and is not limited to the embodiment.
  • the buffer member 4 is further provided with a groove 43 in the direction away from the right angle surface of the side surface of the light guide plate 1 and away from the light guide plate 1.
  • the direction of the groove 43 and the side of the light guide plate 1 Further, in the embodiment, the buffer member 4 is further provided with a light guide plate bearing surface 44, and the light guide plate bearing surface 44 and the two right angle sides 41 of the buffer member 4 are perpendicular to each other.
  • the groove 43 can make the two right angle sides 41 softer, providing a larger buffering margin.
  • the toothed buffer surface 42 is insufficient for buffer adjustment, and further deforms to improve the buffering effect.
  • the light guide plate bearing surface 44 can prevent the light guide plate 1 from sinking while protecting the light guide plate 1.
  • the angle X direction and the Y direction of the light guide plate 1 are rigidly positioned by the positioning column 2, so that the structure is simple and easy to assemble.
  • the remaining directions may also be positioned by the two right-angled edges 41 of the cushioning member 4, or the remaining directions are buffered and positioned by the positioning post of the elastic plastic capsule 3, and the above-mentioned beneficial effects can be obtained.
  • the cushioning member and the positioning member may also be integrally formed; the positioning member may also be a rear frame.

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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

一种侧光式背光模组及液晶显示装置，所述侧光式背光模组包括导光板（1）及用于定位导光板的定位件（2），所述导光板（1）在朝向光源的方向上被刚性定位，在其余方向上均被缓冲定位。本发明侧光式背光模组及液晶显示装置采用了新的导光板定位结构，由于导光板（1）在朝向光源的方向上进行刚性定位，可以控制导光板（1）与侧光式背光模组之间的耦光距离，以获得较佳的导光效果；而在其余方向上进行缓冲定位，以便吸收导光板（1）的涨缩量，避免导光板（1）的翘曲、变形；同时也可以避免收到冲击时导光板（1）与定位结构刚性接触导致导光板（1）破裂。

Description

【技术领域】
本发明属于液晶显示领域， 更具体的说， 涉及一种侧光式背光模组及液晶 显示装置。
【背景技术】
现行量产的侧光式背光模组需要用到导光板（ Light Guide Panel ), 由于背 光模组光源与导光板之间的藕光距离要求比较精确， 故导光板的安装都倾向于 采用刚性的定位柱定位或直角定位边， 然而背光模组光源在工作时会散发热量， 使导光板升温并热涨， 由于定位柱、 直角定位边由刚性材料制成， 不具有緩沖 性， 由此可能引发如下问题： 一是导光板的涨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。
【发明内容】
本发明所要解决的技术问题是提供一种侧光式背光模组及液晶显示装置， 其采用的导光板定位结构即能精确保证背光模组光源与导光板之间的藕光距 离， 又可以充分吸收导光板的涨缩量。
本发明的技术方案为： 一种侧光式背光模组， 包括导光板及用于定位导光 板的定位件， 所述导光板在朝向光源的方向上被刚性定位、 在其余方向上均被 緩沖定位。
优选的， 所述导光板靠近光源的一个角在 X方向上被刚性定位、 在 Y方向 上被刚性定位或緩沖定位， 其余角在 X方向和 Y方向上均被緩沖定位， 其中， 在导光板平面内， 与导光板的入光面垂直的方向为 X方向， 与入光面平行的方 向为 Y方向。
优选的， 所述导光板被刚性定位的角处设有缺口， 所述定位件上对应缺口 处设置有定位柱， 所述定位柱使该角在 X方向和 Y方向均被刚性定位。 采用定 位柱及在导光板上设置缺口的方案， 是由于靠近光源的位置空间非常有限， 而 此方案对空间的占用较小， 可以尽可能的减小背光模组的体积。
优选的， 所述其余方向均采用緩沖件緩沖定位， 所述緩沖件包括两直角边， 两直角边分别贴合在导光板相应角的两外侧面。 采用面接触定位， 不需对导光 板做任何的加工， 不会出现在导光板上开缺口而引起的光学品质的下降。
优选的， 所述其余方向均采用定位柱緩沖定位， 所述用于緩沖定位的定位 柱上套设有弹性胶圏。 弹性胶圏依靠自身的弹性可以提供一定緩沖空间。
优选的， 所述其余方向部分被緩沖件緩沖定位， 所述緩沖件包括两直角边， 两直角边分别贴合在导光板相应角的两外侧面， 部分被定位柱緩沖定位， 所述 用于緩沖定位的定位柱上套设有弹性胶圏。
优选的， 所述弹性胶圏侧面呈齿状。 外侧面呈齿状的弹性胶圏緩沖空间更 大， 可以充分吸收导光板的涨缩量。
优选的， 所述緩沖件的直角边内侧面呈齿状。 齿状緩沖面可以在不减小定 位长度的情况下， 减小两直角边与导光板之间的接触面积， 从而获得緩沖效果。
优选的， 所述緩沖件在抵接导光板侧面的直角面后、 远离导光板的方向， 还设有沟槽， 所述沟槽的方向与导光板的侧边平行。 沟槽提供了更大的緩沖余 量， 当膨胀量或导光板公差较大齿状緩沖面不足以緩沖调节时， 进一步形变以 提高緩沖效果。
优选的， 所述緩沖件与定位件为一体制成。
优选的， 所述緩沖件与定位件为分体结构， 所述定位件上设有定位柱， 緩 沖件对应位置设有定位孔， 所述定位柱套设在定位孔内把緩沖件固定。
优选的， 所述緩沖件上还设有导光板承载面， 导光板承载面与緩沖件的两 直角边相互垂直。 导光板承载面可以在保护导光板的同时防止导光板下沉。
优选的， 所述定位件为背板或后框。
优选的， 所述导光板的入光面与光源为零间隙装配。 导光板的入光面与光 源的间隙越小耦光效果就越好， 间隙为零时就最好， 导光板的膨胀量完全可以 全部由其它方向吸收。
本发明还公开了一种液晶显示装置， 包括： 侧光式背光模组， 所述侧光式 背光模组包括导光板及用于定位导光板的定位件， 所述导光板在朝向光源的方 向上被刚性定位、 在其余方向上均被緩沖定位。
优选的， 所述导光板靠近光源的一个角在 X方向上被刚性定位、 在 Y方向 上被刚性定位或緩沖定位， 其余角在 X方向和 Y方向上均被緩沖定位， 其中， 在导光板平面内， 与导光板的入光面垂直的方向为 X方向， 与入光面平行的方 向为 Y方向。
优选的， 所述导光板被刚性定位的角处设有缺口， 所述定位件上对应缺口 处设置有定位柱， 所述定位柱使该角在 X方向和 Y方向均被刚性定位。
优选的， 所述其余方向均采用緩沖件緩沖定位， 所述緩沖件包括两直角边， 两直角边分别贴合在导光板相应角的两外侧面。
优选的， 所述其余方向部分被緩沖件緩沖定位， 所述緩沖件包括两直角边， 两直角边分别贴合在导光板相应角的两外侧面， 部分被定位柱緩沖定位， 所述 用于緩沖定位的定位柱上套设有弹性胶圏。
优选的， 所述緩沖件的直角边内侧面呈齿状。
优选的， 所述緩沖件在抵接导光板侧面的直角面后、 远离导光板的方向， 还设有沟槽， 所述沟槽的方向与导光板的侧边平行。
优选的， 所述緩沖件与定位件为分体结构， 所述定位件上设有定位柱， 緩 沖件对应位置设有定位孔， 所述定位柱套设在定位孔内把緩沖件固定。
本发明的有益效果为： 本发明侧光式背光模组及液晶显示装置采用了新的 导光板定位结构， 该定位结构是对导光板在朝向光源的方向上进行刚性定位、 在其余方向上进行緩沖定位， 由于导光板在朝向光源的方向上进行刚性定位， 可以控制导光板与侧光式背光模组光源之间的藕光距离， 以获得较佳的导光效 果； 而在其余方向上进行緩沖定位， 以便吸收导光板的涨缩量， 避免导光板的 翘曲、 变形； 同时也可以避免受到沖击时导光板与定位结构刚性接触导致导光 板破裂。
【附图说明】
图 1是本发明侧光式背光模组定位柱刚性定位的示意图；
图 2是本发明侧光式背光模组定位柱緩沖定位的示意图；
图 3是本发明侧光式背光模组緩沖件两直角边緩沖定位结构的示意图； 图 4是本发明所述緩沖件的结构示意图。
其中： 1、 导光板； 2、 定位柱； 3、 弹性胶圏； 4、 緩沖件； 41、 直角边； 42、 齿状緩沖面； 43、 沟槽； 44、 导光板承载面； 5、 背板。
【具体实施方式】
本发明公开一种侧光式背光模组和液晶显示装置， 所述液晶显示装置包括 侧光式背光模组， 作为本发明侧光式背光模组的实施例， 如图 1至 4所示， 所 述侧光式背光模组包括导光板 1及用于定位导光板 1 的定位件， 所述导光板 1 在朝向光源的方向上被刚性定位、 在其余方向上均被緩沖定位。
本发明侧光式背光模组及液晶显示装置采用了新的导光板定位结构， 该定 位结构是对导光板 1 在朝向光源的方向上进行刚性定位、 在其余方向上进行緩 沖定位， 由于导光板 1 在朝向光源的方向上进行刚性定位， 可以控制导光板与 侧光式背光模组光源之间的藕光距离， 以获得较佳的导光效果； 而在其余方向 上进行緩沖定位， 以便吸收导光板的涨缩量， 避免导光板 1 的翘曲、 变形； 同 时也可以避免受到沖击时导光板 1与定位结构刚性接触导致导光板破裂。
导光板 1的入光面与光源的间隙越小耦光效果就越好， 间隙为零时就最好。 本发明中所述导光板 1的入光面与光源可以为零间隙装配， 导光板 1的膨胀量 完全可以全部由其它方向吸收。
本实施例中定位件为背板 5, 导光板 1被定位在背板 5上， 所述导光板 1 被刚性定位的角处设有缺口， 所述背板 5 上对应缺口处设置有定位柱， 所述定 位柱使该角在 X方向和 Y方向均被刚性定位，其余角在 X方向和 Y方向上均被 緩沖定位。 其中， 在导光板平面内， 与导光板的入光面垂直的方向为 X方向， 与入光面平行的方向为 Y方向。采用定位柱 2及在导光板 1上设置缺口的方案， 是由于靠近光源的位置空间非常有限， 而此方案对空间的占用较小， 可以尽可 能的减小背光模组的体积。 本实施例是对导光板 1的一个角采用定位柱 2进行 精确地刚性定位， 故该角在 X方向上被精确定位， 具体可采用零装配间隙定位， 以控制导光板 1 与侧光式背光模组光源之间的藕光距离， 以获得较佳的导光效 果， 导光板 1的其余角在 X方向和 Y方向上均采用緩沖定位结构， 以便吸收导 光板的涨缩量， 避免导光板的翘曲、 变形； 同时也可以避免受到沖击时导光板 1 与定位结构刚性接触导致导光板 1 破裂。 由于本实施例导光板的定位结构采用 了一角精确刚性定位， 三角緩沖定位， 所以导光板 1安装也非常容易。
本实施例中， 所述其余方向部分被緩沖件 4緩沖定位， 所述緩沖件 4包括 两直角边 41 , 两直角边 41分别贴合在导光板 1相应的两外侧面， 部分被定位柱 緩沖定位。 如图 2所示， 所述用于緩沖定位的定位柱上套设有弹性胶圏 3, 所述 弹性胶圏 3侧面为齿状， 所述弹性胶圏 3材料为橡胶或硅胶， 也可以为其它弹 性材料。 弹性胶圏 3依靠自身的弹性可以提供一定緩沖空间， 而外侧面呈齿状 的弹性胶圏 3緩沖空间更大， 可以充分吸收导光板 1的涨缩量， 弹性胶圏 3的 外侧面的具体齿形则可自由选择， 半圓弧状或矩形等形状均可， 并非局限于实 施例。
又如图 3和图 4所示， 所述导光板 1远离光源的两个角被緩沖件 4緩沖定 位， 采用面接触定位， 不需对导光板 1做任何的加工， 不会出现在导光板 1上 开缺口而引起的光学品质的下降。 所述緩沖件 4与背板 5为分体结构， 所述背 板 5上设有定位柱， 緩沖件 4对应位置设有定位孔， 所述定位柱套设在定位孔 内把緩沖件 4固定， 緩沖件 4的直角边 41内侧面呈齿状， 形成齿状緩沖面 42, 所述緩沖件 4两直角边 41上的齿状緩沖面 42可以在不减小定位长度的情况下， 减小两直角边 41与导光板 1之间的接触面积， 从而获得緩沖效果， 齿状緩沖面 42的具体齿形则可自由选择， 半圓弧状或矩形等形状均可， 并非局限于实施例。
本实施例中，所述緩沖件 4在抵接导光板 1侧面的直角面后、远离导光板 1 的方向， 还设有沟槽 43, 所述沟槽 43的方向与导光板 1的侧边平行； 另外本实 施例中所述緩沖件 4上还设有导光板承载面 44,导光板承载面 44与緩沖件 4的 两直角边 41相互垂直。 沟槽 43可以使两直角边 41变得软一些， 提供了更大的 緩沖余量， 当膨胀量或导光板 1公差较大齿状緩沖面 42不足以緩沖调节时， 进 一步形变以提高緩沖效果； 而导光板承载面 44则可以在保护导光板 1的同时防 止导光板 1下沉。
本实施例中， 所述导光板 1被刚性定位的角 X方向和 Y方向均被定位柱 2 刚性定位， 故结构筒单， 组装方便。 当然也可以只对该角的 X方向刚性定位， 对该角的 Y方向进行緩沖定位， 比如采用緩沖件直角边定位， 直角边在 X方向 上采用传统的刚性定位， 在 Y方向上采用緩沖边定位， 同样能达到上述的有益 效果。
在本发明中， 所述其余方向也可以均被緩沖件 4的两直角边 41定位， 或者 所述其余方向均被套设有弹性胶圏 3 的定位柱緩沖定位， 都能取得上述的有益 效果。
在本发明中， 所述緩沖件与定位件也可以为一体制成； 所述定位件还可以 为后框。
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、 一种侧光式背光模组， 包括： 导光板及用于定位导光板的定位件， 所述 导光板在朝向光源的方向上被刚性定位、 在其余方向上均被緩沖定位。
2、 如权利要求 1所述的侧光式背光模组， 其特征在于， 所述导光板靠近光 源的一个角在 X方向上被刚性定位、 在 Y方向上被刚性定位或緩沖定位， 其余 角在 X方向和 Y方向上均被緩沖定位， 其中， 在导光板平面内， 与导光板的入 光面垂直的方向为 X方向， 与入光面平行的方向为 Y方向。
3、 如权利要求 2所述的侧光式背光模组， 其特征在于， 所述导光板被刚性 定位的角处设有缺口， 所述定位件上对应缺口处设置有定位柱， 所述定位柱使 该角在 X方向和 Y方向均被刚性定位。
4、 如权利要求 1所述的侧光式背光模组， 其特征在于， 所述其余方向均采 用緩沖件緩沖定位， 所述緩沖件包括两直角边， 两直角边分别贴合在导光板相 应角的两外侧面。
5、 如权利要求 2所述的侧光式背光模组， 其特征在于， 所述其余方向均采 用定位柱緩沖定位， 所述用于緩沖定位的定位柱上套设有弹性胶圏。
6、 如权利要求 2所述的侧光式背光模组， 其特征在于， 所述其余方向部分 被緩沖件緩沖定位， 所述緩沖件包括两直角边， 两直角边分别贴合在导光板相 应角的两外侧面， 部分被定位柱緩沖定位， 所述用于緩沖定位的定位柱上套设 有弹性胶圏。
7、 如权利要求 5所述的侧光式背光模组， 其特征在于， 所述弹性胶圏侧面 呈齿状。
8、 如权利要求 4所述的侧光式背光模组， 其特征在于， 所述緩沖件的直角 边内侧面呈齿状。
9、 如权利要求 8所述的侧光式背光模组， 其特征在于， 所述緩沖件在抵接 导光板侧面的直角面后、 远离导光板的方向， 还设有沟槽， 所述沟槽的方向与 导光板的侧边平行。
10、 如权利要求 6所述的侧光式背光模组， 其特征在于， 所述緩沖件的直 角边内侧面呈齿状。
11、 如权利要求 10所述的侧光式背光模组， 其特征在于， 所述緩沖件在抵 接导光板侧面的直角面后、 远离导光板的方向， 还设有沟槽， 所述沟槽的方向 与导光板的侧边平行。
12、 如权利要求 4所述的侧光式背光模组， 其特征在于， 所述緩沖件与定 位件为分体结构， 所述定位件上设有定位柱， 緩沖件对应位置设有定位孔， 所 述定位柱套设在定位孔内把緩沖件固定。
13、 如权利要求 6所述的侧光式背光模组， 其特征在于， 所述緩沖件与定 位件为分体结构， 所述定位件上设有定位柱， 緩沖件对应位置设有定位孔， 所 述定位柱套设在定位孔内把緩沖件固定。
14、 如权利要求 1 所述的侧光式背光模组， 其特征在于， 所述导光板的入 光面与光源为零间隙装配。
15、 一种液晶显示装置， 包括： 侧光式背光模组， 所述侧光式背光模组包 括导光板及用于定位导光板的定位件， 所述导光板在朝向光源的方向上被刚性 定位、 在其余方向上均被緩沖定位。
16、 如权利要求 15所述的液晶显示装置， 其特征在于， 所述导光板靠近光 源的一个角在 X方向上被刚性定位、 在 Y方向上被刚性定位或緩沖定位， 其余 角在 X方向和 Y方向上均被緩沖定位， 其中， 在导光板平面内， 与导光板的入 光面垂直的方向为 X方向， 与入光面平行的方向为 Y方向。
17、 如权利要求 16所述的液晶显示装置， 其特征在于， 所述导光板被刚性 定位的角处设有缺口， 所述定位件上对应缺口处设置有定位柱， 所述定位柱使 该角在 X方向和 Y方向均被刚性定位。
18、 如权利要求 15所述的液晶显示装置， 其特征在于， 所述其余方向均采 用緩沖件緩沖定位， 所述緩沖件包括两直角边， 两直角边分别贴合在导光板相 应角的两外侧面。
19、 如权利要求 16所述的液晶显示装置， 其特征在于， 所述其余方向部分 被緩沖件緩沖定位， 所述緩沖件包括两直角边， 两直角边分别贴合在导光板相 应角的两外侧面， 部分被定位柱緩沖定位， 所述用于緩沖定位的定位柱上套设 有弹性胶圏。
20、 如权利要求 18所述的液晶显示装置， 其特征在于， 所述緩沖件的直角 边内侧面呈齿状。
21、 如权利要求 20所述的液晶显示装置， 其特征在于， 所述緩沖件在抵接 导光板侧面的直角面后、 远离导光板的方向， 还设有沟槽， 所述沟槽的方向与 导光板的侧边平行。
22、 如权利要求 18所述的液晶显示装置， 其特征在于， 所述緩沖件与定位 件为分体结构， 所述定位件上设有定位柱， 緩沖件对应位置设有定位孔， 所述 定位柱套设在定位孔内把緩沖件固定。
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