WO2013082769A1 - 一种背光模组及其液晶显示装置 - Google Patents

一种背光模组及其液晶显示装置 Download PDF

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Publication number
WO2013082769A1
WO2013082769A1 PCT/CN2011/083608 CN2011083608W WO2013082769A1 WO 2013082769 A1 WO2013082769 A1 WO 2013082769A1 CN 2011083608 W CN2011083608 W CN 2011083608W WO 2013082769 A1 WO2013082769 A1 WO 2013082769A1
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WO
WIPO (PCT)
Prior art keywords
light guide
guide plate
optical sheet
card
fixed
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/CN2011/083608
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English (en)
French (fr)
Inventor
俞刚
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 US13/378,126 priority Critical patent/US8937693B2/en
Publication of WO2013082769A1 publication Critical patent/WO2013082769A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • 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
    • G02F2201/46—Fixing elements
    • 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 backlight module and a liquid crystal display device therefor.
  • the liquid crystal display device includes a liquid crystal panel. Since the liquid crystal itself does not emit light, it is necessary to add a backlight module at the bottom of the liquid crystal panel.
  • the backlight module can be divided into a direct type and a side light type according to the installation position of the light source, and the side light type
  • the backlight module includes a light guide plate and an optical sheet covering the light exit surface of the light guide plate, and a light source is disposed on a side surface of the light guide plate.
  • the positioning of the optical sheet 100 is usually performed by riveting the metal post 200 on the frame 300 of the liquid crystal display device, but it does not take into consideration factors such as temperature changes. The thermal expansion and contraction effect, which in turn causes deformation or warpage of the optical sheet 100, resulting in uneven optical performance.
  • the technical problem to be solved by the present invention is to provide a backlight module and a liquid crystal display device which are better in preventing warpage of optical sheets and improving optical performance.
  • a backlight module includes a light guide plate and an optical sheet disposed on a light exit surface of the light guide plate, and an edge of the optical sheet is fixed on the light guide plate by a plurality of positioning structures.
  • one end of the positioning structure is fixed on the side of the light guide plate; the other end is provided with a hanging card.
  • the edge of the optical sheet is provided with a card hole, and the card passes through the card hole.
  • the positioning structure is fixed at one end of the side surface of the light guide plate, and the positioning structure is fixed to the side of the light guide plate through a screw through the opening. This is a fixed way of positioning the structure.
  • the positioning structure is fixed at one end of the side of the light guide plate with a bump, correspondingly,
  • the side surface of the light guide plate is provided with a corresponding groove; the card block and the light guide plate are fixed by the way in which the protrusion is embedded in the groove. This is another way to fix the positioning structure, it can be assembled without adding additional parts, and the installation process is efficient.
  • the middle portion of the bump is a cylinder, and two square sub-bumps extend from the cylindrical surface of the cylinder.
  • the hole width of the card hole is larger than the thickness of the card.
  • the thermal expansion ratio of the material of the optical sheet and the light guide plate is close, there is still a certain difference. If the relative positions of the two sheets are completely fixed, when the temperature changes, the optical sheet may be slightly warped by the squeeze of the card. , affecting display quality.
  • the hole width of the card hole is larger than the thickness of the card to ensure that the optical sheet has a certain amount of motion margin, further reducing the possibility of warpage.
  • the card is in direct contact with an end of the card hole away from the light guide plate.
  • the card In the initial state of the assembly, the card is pressed against the end of the card hole away from the light guide plate, which ensures that the optical sheet is stretched outward to eliminate the possibility of warpage.
  • a liquid crystal display device includes the above backlight module.
  • the invention adds a positioning structure at the edge of the light guide plate and the optical sheet. Since the expansion coefficient of the optical sheet and the frame are far apart, but the thermal expansion rate of the material of the light guide plate is close, the optical sheet is fixed on the light guide plate, and is heated. At the same time, the light guide plate will follow the expansion of the optical sheet. When the temperature drops, the light guide plate will follow the shrinkage of the optical sheet.
  • the difference between the two is small, so the optical sheet is not easy to warp; and the optical sheet and the light guide plate are close to each other, the hot and cold environment
  • the high degree of similarity, and the frame ratio, the temperature of the optical sheet and the light guide plate are closer, and the thermal expansion rates of the two are close to each other, further reducing the possibility of warpage of the optical sheet.
  • Figure 1 is a conventional optical sheet fixing method
  • FIG. 2 is an optical sheet fixing embodiment of the embodiment of the present invention
  • Figure 3 is a diagram showing the fixed explosion of an optical sheet according to an embodiment of the present invention
  • FIG. 4 is a schematic view showing the fixing of an optical sheet according to Embodiment 2 of the present invention.
  • Figure 5 is a diagram showing the fixed explosion of the optical sheet of the second embodiment of the present invention.
  • FIG. 6 is a schematic view showing a light positioning structure according to Embodiment 2 of the present invention.
  • 100 optical sheet
  • 300 frame
  • 400 light guide plate
  • 410 screw hole
  • 500 screw
  • 600 positioning structure
  • 610 card
  • 620 bump.
  • the liquid crystal display device includes a liquid crystal panel and a backlight module.
  • the backlight module includes a light guide plate and an optical sheet disposed on the light exit surface of the light guide plate. The edge of the optical sheet is fixed on the light guide plate by a plurality of positioning structures.
  • the side of the light guide plate is provided with a positioning structure.
  • the positioning structure is a card with a through hole, and the card is fixed on the light guide plate by a screw passing through the through hole, and the side of the light guide plate is disposed. Screw hole, the through hole of the card is aligned with the screw hole, and then fixed by screws.
  • the card can also be fixed on the light guide plate by riveting, strong glue sticking, etc.
  • a hole is formed at the edge of the optical module, and one end of the card is suspended through the hole for positioning. If the light guide plate is affected by heat or ambient humidity, it will cause thermal expansion and contraction. Because the card will move with the light guide plate, the positioning structure will always hold the optical sheet to keep it flat and avoid warpage and other undesirable phenomena.
  • the thermal expansion ratio of the material of the optical sheet and the light guide plate is close, there is still a certain difference. If the relative positions of the two sheets are completely fixed, when the temperature changes, the optical sheet may be slightly warped by the squeeze of the card. , affecting display quality.
  • the hole width of the card hole is larger than the thickness of the card, and the card is in direct contact with the end of the card hole away from the light guide plate. In this way, in the initial state of the assembly, the card is pressed against the end of the card hole away from the light guide plate, so that even if the thermal expansion of the material of the optical sheet and the light guide plate is different, the hole width of the card hole is larger than the thickness of the card to ensure that the optical sheet can have a certain degree. Activity margin, further reduction The possibility of warping ensures that the optical sheet is stretched out to eliminate the possibility of warpage and improve the display quality.
  • the card can also be fixed on the light guide plate by riveting, strong glue sticking, and the like.
  • a hole is formed at the edge of the optical module, and a positioning structure is fixed on the side of the light guide plate.
  • the positioning structure is fixed at one end of the side of the light guide plate with a bump, and the other end is provided with a card.
  • the side surface of the light guide plate is provided with a corresponding groove, and the block and the light guide plate are fixed by the way in which the protrusion is embedded in the groove.
  • the positioning of the optical sheet is achieved between the positioning structure and the optical sheet through the card through the card hole. If the light guide plate is affected by heat or ambient humidity, it will cause thermal expansion and contraction. Because the positioning structure will move with the light guide plate, the positioning structure will always hold the optical sheet to keep it flat and avoid warping and other undesirable phenomena.
  • the middle part of the bump is a cylinder, and two square sub-bumps are extended on the cylinder surface.
  • the cylinder is conveniently introduced into the groove, and the square sub-bumps on both sides are positioned to prevent the protrusion from rotating in the groove.
  • the shape of the bump may also adopt a wedge shape or the like which can be easily fitted to the groove.
  • the card can also be fixed to the light guide plate by riveting, strong glue sticking, and the like.
  • the thermal expansion ratio of the material of the optical sheet and the light guide plate is close, there is still a certain difference. If the relative positions of the two sheets are completely fixed, when the temperature changes, the optical sheet may be slightly warped by the squeeze of the card. , affecting display quality.
  • the hole width of the card hole is larger than the thickness of the card, and the card is in direct contact with the end of the card hole away from the light guide plate. In this way, in the initial state of the assembly, the card is pressed against the end of the card hole away from the light guide plate, so that even if the thermal expansion of the material of the optical sheet and the light guide plate is different, the hole width of the card hole is larger than the thickness of the card to ensure that the optical sheet can have a certain degree.
  • the activity margin further reduces the possibility of warpage, ensuring that the optical sheet is stretched out, preventing the possibility of warpage and improving the display quality.

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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)
  • Liquid Crystal (AREA)

Abstract

一种背光模组及其液晶显示装置。该背光模组包括导光板（400）、铺设在导光板（400）出光面的光学薄片（100），所述光学薄片（100）的边缘通过多个定位结构（600）固定在所述导光板（400）上。该背光模组在导光板（400）和光学薄片（100）边缘处加设了定位结构（600），由于光学薄片（100）与框架（300）的膨胀系数相差很远，但和导光板（400）的材质的热膨胀率接近，所以光学薄片（100）固定在导光板（400）上，受热的时候导光板（400）会跟随光学薄片（100）膨胀，温度下降的时候导光板（400）会跟随光学薄片（100）收缩，两者的变化幅度差别很小，因此光学薄片（100）不易产生翘曲；且光学薄片（100）和导光板（400）距离近，冷热环境相同度高，和框架（300）比，光学薄片（100）和导光板（400）的温度更为接近，再加上两者的热膨胀率接近，进一步降低了光学薄片（100）产生翘曲的可能性。

Description

一种背光模组及其液晶显示装置
【技术领域】
本发明涉及液晶显示领域， 更具体的说， 涉及一种背光模组和及其液晶显 示装置。
【背景技术】
液晶显示装置包括液晶面板， 由于液晶本身不会发光， 因此就需要在液晶 面板底部加设背光模组， 背光模组按光源的安装位置分可以分为直下式和侧光 式， 侧光式的背光模组中， 包括导光板以及覆盖在导光板出光面的光学薄片， 所述导光板侧面设有光源。 如图 1 所示， 在目前的液晶显示装置的设计中， 光 学薄片 100的定位通常是通过在液晶显示装置的框架 300上铆接金属柱 200来 定位， 但其并无考虑温度变化等因素会造成的热胀冷缩效应， 这会进而造成光 学薄片 100的变形或翘曲现象， 造成光学效能不均。
【发明内容】
本发明所要解决的技术问题是提供一种较好的避免光学薄片翘曲现象， 提 升光学效能的背光模组及其液晶显示装置。
本发明的目的是通过以下技术方案来实现的：
一种背光模组， 包括导光板、 铺设在导光板出光面的光学薄片， 所述光学 薄片的边缘通过多个定位结构固定在所述导光板上。
优选的， 所述定位结构一端固定在所述导光板的侧面； 另外一端设有悬空 的卡片， 相应的， 所述光学薄片边缘设有卡孔， 所述卡片穿过所述卡孔。 此为 定位机构的一种具体形式， 采用卡片和卡孔的配合方式方便拆装。
优选的， 所述定位结构固定在所述导光板侧面的一端设开孔， 所述定位结 构通过螺丝穿过开孔固定在所述导光板侧面。 此为一种定位结构的固定方式。
优选的， 所述定位结构固定在所述导光板侧面的一端设有凸块， 相应的， 所述导光板的侧面设有相应的凹槽； 所述卡块和所述导光板通过所述凸块嵌入 所述凹槽的方式实现固定。 此为另外一种定位结构的固定方式， 无需增加额外 的零部件就可以装配， 安装过程筒单高效。
优选的， 所述凸块中部为一个圓柱体， 圓柱体柱面上延伸出两个方形的子 凸块。 此为一种凸块的具体形状， 圓柱体方便导入凹槽， 两侧的方形子凸块进 行定位， 防止凸块在凹槽内转动。
优选的， 所述卡孔的孔宽大于所述卡片的厚度。 虽然光学薄片和导光板的 材质的热膨胀率接近， 但仍然会有一定的差异， 如果两者的相对位置完全固定， 当温度变化时， 光学薄片可能受到卡片的挤压出现小幅度的翘曲变形， 影响显 示品质。 卡孔的孔宽大于卡片的厚度可以保证光学薄片能有一定的活动余量， 进一步降低翘曲的可能性。
优选的， 所述卡片与所述卡孔远离导光板的一端直接接触。 在装配的初始 状态将卡片抵住卡孔远离导光板的一端， 这样可以保证光学薄片处于一种往外 拉伸的状态， 杜绝翘曲的可能性。
一种液晶显示装置， 包括上述的一种背光模组。
本发明在导光板和光学薄片边缘处加设了定位结构， 由于光学薄片与框架 的膨胀系数相差很远， 但和导光板的材质的热膨胀率接近， 所以光学薄片固定 在导光板上， 受热的时候导光板会跟随光学薄片膨胀， 温度下降的时候导光板 会跟随光学薄片收缩， 两者的变化幅度差别很小， 因此光学薄片不易产生翘曲； 且光学薄片和导光板距离近， 冷热环境相同度高， 和框架比， 光学薄片和导光 板的温度更为接近， 再加上两者的热膨胀率接近， 进一步降低了光学薄片产生 翘曲的可能性。
【附图说明】
图 1是现有的光学薄片固定方式；
图 2是本发明实施例一光学薄片固定示 图 3是本发明实施例一光学薄片固定爆炸图；
图 4是本发明实施例二光学薄片固定示意图；
图 5是本发明实施例二光学薄片固定爆炸图；
图 6是本发明实施例二光定位结构示意图图；
其中： 100、 光学薄片； 110、 200、 金属柱； 300、 框架； 400、 导光板； 410、 螺丝孔； 500、 螺丝； 600、 定位结构； 610、 卡片； 620、 凸块。
【具体实施方式】
下面结合附图和较佳的实施例对本发明作进一步说明。
液晶显示装置包括液晶面板和背光模组， 背光模组包括导光板和铺设在导 光板出光面的光学薄片， 所述光学薄片的边缘通过多个定位结构固定在所述导 光板上。
实施例一
如图 2、 3所示， 所述导光板侧面设有定位结构， 该定位结构是带通孔的卡 片， 通过螺丝穿过通孔的方式将卡片固定在导光板上， 及导光板侧面设有螺丝 孔， 卡片的通孔对准螺丝孔后， 用螺丝进行固定， 当然， 卡片也可以以铆接、 强力胶粘贴等方式固定在导光板上。 另一方面， 光学模块边缘处设有卡孔， 卡 片悬空的一端穿过卡孔， 实现定位。 导光板受热或者环境湿度影响会产生热胀 冷缩现象， 因为卡片会随着导光板移动， 进而保持定位结构始终拉住光学薄片， 使其保持平坦状态， 避免产生翘曲等不良现象。
虽然光学薄片和导光板的材质的热膨胀率接近， 但仍然会有一定的差异， 如果两者的相对位置完全固定， 当温度变化时， 光学薄片可能受到卡片的挤压 出现小幅度的翘曲变形， 影响显示品质。 卡孔的孔宽大于卡片的厚度， 卡片与 卡孔远离导光板的一端直接接触。 这样在装配的初始状态将卡片抵住卡孔远离 导光板的一端， 这样即使光学薄片和导光板的材质的热膨胀有一定的差异， 卡 孔的孔宽大于卡片的厚度可以保证光学薄片能有一定的活动余量， 进一步降低 翘曲的可能性， 可以保证光学薄片处于一种往外拉伸的状态， 杜绝翘曲的可能 性， 提升显示品质。
当然， 卡片也可以以铆接、 强力胶粘贴等方式固定在导光板上。
实施例二
如图 4~6所示， 光学模块边缘处设有卡孔， 导光板侧面固定有定位结构， 定位结构固定在导光板侧面的一端设有凸块， 另外一端设有卡片。 相应的， 所 述导光板的侧面设有相应的凹槽， 所述卡块和所述导光板通过所述凸块嵌入所 述凹槽的方式实现固定。 定位结构与光学薄片之间通过卡片穿过卡孔， 实现光 学薄片的定位。 导光板受热或者环境湿度影响会产生热胀冷缩现象， 因为定位 结构会随着导光板移动， 进而保持定位结构始终拉住光学薄片， 使其保持平坦 状态， 避免产生翘曲等不良现象。
凸块中部为一个圓柱体， 圓柱体柱面上延伸出两个方形的子凸块， 圓柱体 方便导入凹槽， 两侧的方形子凸块进行定位， 防止凸块在凹槽内转动。 当然， 凸块形状也可以采用楔形等其他可以方便与凹槽配合的形状。 当然， 卡片也可 以以铆接、 强力胶粘贴等方式固定在导光板上。
虽然光学薄片和导光板的材质的热膨胀率接近， 但仍然会有一定的差异， 如果两者的相对位置完全固定， 当温度变化时， 光学薄片可能受到卡片的挤压 出现小幅度的翘曲变形， 影响显示品质。 卡孔的孔宽大于卡片的厚度， 卡片与 卡孔远离导光板的一端直接接触。 这样在装配的初始状态将卡片抵住卡孔远离 导光板的一端， 这样即使光学薄片和导光板的材质的热膨胀有一定的差异， 卡 孔的孔宽大于卡片的厚度可以保证光学薄片能有一定的活动余量， 进一步降低 翘曲的可能性， 可以保证光学薄片处于一种往外拉伸的状态， 杜绝翘曲的可能 性， 提升显示品质。
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、 一种背光模组， 包括： 导光板、 铺设在导光板出光面的光学薄片； 所述光学薄片的边缘通过多个定位结构固定在所述导光板上。
2、 如权利要求 1所述的一种背光模组， 其特征在于， 所述定位结构一 端固定在所述导光板的侧面； 另外一端设有悬空的卡片， 相应的， 所述光 学薄片边缘设有卡孔， 所述卡片穿过所述卡孔。
3、 如权利要求 2所述的一种背光模组， 其特征在于， 所述定位结构固 定在所述导光板侧面的一端设开孔， 所述定位结构通过螺丝穿过开孔固定 在所述导光板侧面。
4、 如权利要求 2所述的一种背光模组， 其特征在于， 所述定位结构固 定在所述导光板侧面的一端设有凸块， 相应的， 所述导光板的侧面设有相 固定。
5、 如权利要求 4所述的一种背光模组， 其特征在于， 所述凸块中部为 一个圓柱体， 圓柱体柱面上延伸出两个方形的子凸块。
6、 如权利要求 2所述的一种背光模组， 其特征在于， 所述卡孔的孔宽 大于所述卡片的厚度。
7、 如权利要求 6所述的一种背光模组， 其特征在于， 所述卡片与所述 卡孔远离导光板的一端直接接触。
8、 一种液晶显示装置， 包括如权利要求 1的一种背光模组， 所述背光 模组包括导光板铺设在导光板出光面的光学薄片； 所述光学薄片的边缘通 过多个定位结构固定在所述导光板上。
9、 如权利要求 8所述的一种液晶显示装置， 其特征在于， 所述定位结 构一端固定在所述导光板的侧面； 另外一端设有悬空的卡片， 相应的， 所 述光学薄片边缘设有卡孔， 所述卡片穿过所述卡孔。
10、 如权利要求 9所述的一种液晶显示装置， 其特征在于， 所述定位 结构固定在所述导光板侧面的一端设开孔， 所述定位结构通过螺丝穿过开 孔固定在所述导光板侧面。
11、 如权利要求 9所述的一种液晶显示装置， 其特征在于， 所述定位 结构固定在所述导光板侧面的一端设有凸块， 相应的， 所述导光板的侧面 设有相应的凹槽； 所述卡块和所述导光板通过所述凸块嵌入所述凹槽的方 式实现固定。
12、 如权利要求 11所述的一种液晶显示装置， 其特征在于， 所述凸块 中部为一个圓柱体， 圓柱体柱面上延伸出两个方形的子凸块。
13、 如权利要求 9所述的一种液晶显示装置， 其特征在于， 所述卡孔 的孔宽大于所述卡片的厚度。
14、 如权利要求 13所述的一种液晶显示装置， 其特征在于， 所述卡片 与所述卡孔远离导光板的一端直接接触。
PCT/CN2011/083608 2011-12-05 2011-12-07 一种背光模组及其液晶显示装置 Ceased WO2013082769A1 (zh)

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