WO2014063346A1 - 一种液晶显示装置及其背光模组 - Google Patents

一种液晶显示装置及其背光模组 Download PDF

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Publication number
WO2014063346A1
WO2014063346A1 PCT/CN2012/083570 CN2012083570W WO2014063346A1 WO 2014063346 A1 WO2014063346 A1 WO 2014063346A1 CN 2012083570 W CN2012083570 W CN 2012083570W WO 2014063346 A1 WO2014063346 A1 WO 2014063346A1
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WO
WIPO (PCT)
Prior art keywords
positioning
hole
optical film
elastic body
light guide
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PCT/CN2012/083570
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English (en)
French (fr)
Inventor
黄冲
萧宇均
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深圳市华星光电技术有限公司
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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 US13/697,985 priority Critical patent/US9158060B2/en
Publication of WO2014063346A1 publication Critical patent/WO2014063346A1/zh

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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
    • 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
    • G02F1/133328—Segmented 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
    • 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 technology, and in particular, to a liquid crystal display device and a backlight module thereof.
  • the liquid crystal display device comprises a liquid crystal panel and a backlight module, and the backlight module provides light for the display of the liquid crystal panel.
  • the backlight module includes a light guide plate and a plurality of optical films disposed on the light exit surface of the light guide plate. Whether the reliability of the optical film positioning in the backlight module affects the optical quality of the backlight module.
  • one method of positioning the optical film is: the rubber body supports four corner portions of the light guide plate, and the optical film is disposed on a side of the light guide plate facing away from the rubber body, and is arranged upwardly on the rubber body.
  • the fixing post, the optical film is sleeved on the fixing post, and further tape is attached on the optical film to position the optical film.
  • the inventor of the present invention found in the long-term research and development that the prior art uses a tape to fix the optical film, and the tape is loosened when the optical film is thermally expanded, thereby causing the optical film to jump off, failing to realize its positioning effect, and affecting the backlight.
  • the optical quality of the module is not limited to the long-term research and development.
  • the present invention provides a liquid crystal display device and a backlight module thereof, which can prevent the optical film from jumping off and ensure the optical quality of the backlight module.
  • the present invention adopts a technical solution to provide a backlight module, including: a light guide plate, an optical film, an elastic body, and a positioning column; wherein the elastic body supports a corner portion of the light guide plate, and the optical film
  • the utility model is disposed on a side of the light guide plate facing away from the elastic body; the elastic body is disposed with a socket corresponding to the position of the positioning post, and the lower end of the positioning post is inserted into the insertion hole, so that the positioning post is convexly disposed on the optical film facing the optical film
  • One side of the optical film; at least one ear portion is disposed at the edge of the optical film, the ear portion is provided with a positioning hole, the positioning hole is sleeved on the positioning column, the positioning column at least partially protrudes from the positioning hole; the portion of the positioning column protruding the positioning hole is an expansion portion
  • the diameter of the expansion portion is larger than the diameter of the positioning hole; the elastic body is a rubber body.
  • the backlight module further includes a fixing member, and the fixing member is provided with a fixing hole, and the fixing hole of the fixing member is correspondingly sleeved on the portion of the positioning column protruding the positioning hole to form an expansion portion.
  • the backlight module further includes a plastic frame disposed on a side of the optical film opposite to the light guide plate, and a fixing hole is disposed at a position corresponding to the protruding positioning hole portion of the positioning frame, and the fixing hole of the plastic frame is sleeved on the positioning column. A portion of the positioning hole is protruded to form an expansion portion.
  • a backlight module including: a light guide plate, an optical film, an elastic body, and a positioning column; wherein the elastic body supports the corner portion of the light guide plate, the optical film
  • the sheet is disposed on a side of the light guide plate facing away from the elastic body; the positioning post protrusion is disposed on a side of the elastic body facing the optical film, the edge of the optical film is at least provided with an ear portion, and the ear portion is provided with a positioning hole.
  • the positioning hole is sleeved on the positioning column, and the positioning column at least partially protrudes from the positioning hole; the portion of the positioning column protruding the positioning hole is an expansion portion, and the diameter of the expansion portion is larger than the diameter of the positioning hole.
  • the backlight module further includes a fixing member, and the fixing member is provided with a fixing hole, and the fixing hole of the fixing member is correspondingly sleeved on the portion of the positioning column protruding the positioning hole to form an expansion portion.
  • the backlight module further includes a plastic frame disposed on a side of the optical film opposite to the light guide plate, and a fixing hole is disposed at a position corresponding to the protruding positioning hole portion of the positioning frame, and the fixing hole of the plastic frame is sleeved on the positioning column. A portion of the positioning hole is protruded to form an expansion portion.
  • the position of the elastic body corresponding to the positioning post is provided with a jack, and the lower end of the positioning post is inserted in the jack.
  • the elastomer is a rubber body.
  • a liquid crystal display device including: a backlight module, comprising: a light guide plate, an optical film, an elastic body, and a positioning column; wherein the elastic body supports a corner portion of the light guide plate, the optical film is disposed on a side of the light guide plate facing away from the elastic body; the positioning column protrusion is disposed on a side of the elastic body facing the optical film, and at least an ear portion is disposed at an edge of the optical film.
  • the ear portion is provided with a positioning hole, the positioning hole is sleeved on the positioning column, the positioning column at least partially protrudes from the positioning hole; the portion of the positioning column protruding the positioning hole is an expansion portion, and the diameter of the expansion portion is larger than the diameter of the positioning hole; the liquid crystal display device further comprises a display The display panel is disposed on a side of the optical film facing away from the light guide plate.
  • the backlight module further includes a fixing member, and the fixing member is provided with a fixing hole, and the fixing hole of the fixing member is correspondingly sleeved on the portion of the positioning column protruding the positioning hole to form an expansion portion.
  • the backlight module further includes a plastic frame disposed on a side of the optical film opposite to the light guide plate, and a fixing hole is disposed at a position corresponding to the protruding positioning hole portion of the positioning frame, and the fixing hole of the plastic frame is sleeved on the positioning column. A portion of the positioning hole is protruded to form an expansion portion.
  • the position of the elastic body corresponding to the positioning post is provided with a jack, and the lower end of the positioning post is inserted in the jack.
  • the elastomer is a rubber body.
  • the embodiment of the present invention is characterized in that the portion of the positioning post on the elastic body that protrudes from the positioning hole is used as an expansion portion, and the diameter of the expansion portion is larger than the diameter of the positioning hole, and the diameter is
  • the large expansion section is designed to prevent the optical film from jumping off and to ensure the optical quality of the backlight module.
  • FIG. 1 is a perspective view of the first embodiment of the backlight module of the present invention before the assembly of the elastic body and the positioning post;
  • FIG. 2 is a perspective view of the first embodiment of the backlight module of the present invention before assembly
  • FIG. 3 is a schematic cross-sectional view showing a first embodiment of a backlight module of the present invention before assembly;
  • FIG. 4 is a perspective view of the first embodiment of the backlight module of the present invention after assembly
  • FIG. 5 is a schematic cross-sectional view showing the assembled first embodiment of the backlight module of the present invention.
  • FIG. 6 is a partial perspective view of the second embodiment of the backlight module of the present invention after assembly
  • FIG. 7 is a partial perspective view of the second embodiment of the backlight module of the present invention before assembly
  • FIG. 8 is a cross-sectional view showing the assembled second embodiment of the backlight module of the present invention.
  • Fig. 9 is a schematic cross-sectional view showing the assembled embodiment of the liquid crystal display device of the present invention.
  • the first embodiment of the backlight module 10 of the present invention includes a light guide plate 11, an optical film 12, an elastic body 13, a positioning post 14, and a fixing member 15.
  • the elastic body 13 is disposed at a corner of the light guide plate 11 to support a corner portion of the light guide plate 11.
  • the elastic body 13 is a square body, and is cut at a corner portion to form a square body groove.
  • the corner shape of the light guide plate 11 and the elastic body 13 are formed.
  • the shape of the square groove is adapted such that the corner of the light guide plate 11 can be placed in the square groove.
  • the optical film 12 is disposed on a side of the light guide plate 11 facing away from the elastic body 13.
  • the elastic body 13 is a rubber body, and the number of the elastic bodies 13 may be four, which are respectively disposed corresponding to the four corners of the light guide plate 11; the four elastic bodies 13 may also be integrally formed into one elastic body, which is not limited thereto.
  • the positioning post 14 is convexly disposed on a side of the elastic body 13 facing the optical film 12.
  • the position of the elastic body 13 corresponding to the positioning post 14 is provided with an insertion hole 131, and the lower end of the positioning post 14 can be inserted into the insertion hole 131 by an interference fit or the like.
  • the arrangement of the jack 131 can also be omitted, and the positioning post 14 is directly fixed to the elastic body 13.
  • the positioning column 14 is a stainless steel column, an aluminum column, an aluminum alloy column, a copper column or an iron column.
  • At least one ear portion 121 is disposed at the edge of the optical film 12, and the ear portion 121 is provided with a positioning hole 122.
  • the positioning hole 122 is sleeved on the positioning post 14, and the positioning post 14 at least partially protrudes from the positioning hole 122.
  • the portion of the positioning post 14 protruding from the positioning hole 122 is an expansion portion, and the diameter of the expansion portion is larger than the diameter of the positioning hole 122.
  • the expansion portion is formed by the design of the fixing member 15.
  • the fixing member 15 is provided with a fixing hole 151.
  • the fixing hole 151 of the fixing member 15 is correspondingly sleeved on the portion of the positioning post 14 protruding from the positioning hole 122 to form an expansion portion.
  • the fixing member 15 may have a shape in which the top is a round table, and the bottom connected to the top is a cylinder, wherein the diameter of the cylinder is larger than the diameter of the positioning hole 122.
  • the fixing member 15 located outside the fixing hole 151 forms a certain coverage area for the optical film 12 facing thereto, and the covering area can be effectively prevented.
  • the optical film 12 is tripped.
  • the material of the fixing member 15 can be plastic, rubber or the like. In other embodiments, the fixing member 15 may also be a member of other shapes such as a cylinder or a rectangular block.
  • the first embodiment of the backlight module of the present invention has a fixing hole 151 formed by the fixing member 15.
  • the fixing hole 151 of the fixing member 15 is correspondingly sleeved on the portion of the positioning post 14 protruding from the positioning hole 122 to form an expansion portion, and the diameter of the expansion portion
  • the diameter of the positioning hole 122 is larger than that of the large diameter expansion portion, so that the optical film 12 can be prevented from jumping off and the optical quality of the backlight module 10 can be ensured.
  • the second embodiment of the backlight module 20 of the present invention includes a light guide plate 21 , an optical film 22 , an elastic body 23 , a positioning post 24 , and a plastic frame 25 .
  • the elastic body 23 is disposed at a corner of the light guide plate 21 to support a corner portion of the light guide plate 21, and the optical film 22 is disposed at a side of the light guide plate 21 facing away from the elastic body 23.
  • the positioning post 24 is convexly disposed on a side of the elastic body 23 facing the optical film 22.
  • At least one ear portion 221 is disposed at an edge of the optical film 22.
  • the ear portion 221 is provided with a positioning hole 222.
  • the positioning hole 222 is sleeved on the positioning post 24, and the positioning post 24 at least partially protrudes from the positioning hole 222.
  • the portion of the positioning post 24 protruding from the positioning hole 222 is an expansion portion, and the diameter of the expansion portion is larger than the diameter of the positioning hole 222.
  • the expansion portion is formed by the design of the bezel 25.
  • the plastic frame 25 is disposed on a side of the optical film 22 opposite to the light guide plate 21, and the plastic frame 25 is provided with a fixing hole 251 corresponding to the position of the positioning post 24 protruding from the positioning hole 222, and the fixing hole 251 of the plastic frame 25 is sleeved.
  • the entire plastic frame 25 is an expansion portion defined by an embodiment of the present invention.
  • the length of the plastic frame 25 is larger than the diameter of the positioning hole 222.
  • the portion of the plastic frame 25 located outside the fixing hole 251 forms a certain coverage area for the optical film 22 facing the cover film, and the covering area can effectively prevent The optical film 22 is tripped.
  • the second embodiment of the backlight module 20 of the present invention is provided with a fixing hole 251 at a position corresponding to the positioning of the positioning hole 24 of the positioning frame 24, and the plastic frame 25 is sleeved on the positioning post 24 to form an expansion portion.
  • the diameter of the expansion portion is larger than the diameter of the positioning hole 222, and the design of the expansion portion having a large diameter can prevent the optical film 22 from jumping off and ensure the optical quality of the backlight module 20.
  • the liquid crystal display device 30 embodiment of the present invention includes a display panel 31 and a backlight module (32, 33, 34, 35).
  • the backlight module (32, 33, 34, 35) may be a backlight module as shown in FIG. 1-8, and includes a light guide plate 32, an optical film 33, an elastic body 34, and a positioning post 35.
  • the elastic body 34 supports a corner portion of the light guide plate 32.
  • the optical film 33 is disposed on a side of the light guide plate 32 that faces away from the elastic body 34.
  • the positioning post 35 is convexly disposed on a side of the elastic body 34 facing the optical film 33.
  • At least one ear portion is disposed at an edge of the optical film 33.
  • the ear portion is provided with a positioning hole. The positioning hole is sleeved on the positioning post 35, and the positioning post 35 at least partially protrudes from the positioning hole.
  • the display panel 31 is disposed on a side of the optical film 33 facing away from the light guide plate 32.
  • the portion of the positioning post 35 protruding from the positioning hole is an expansion portion, and the diameter of the expansion portion is larger than the diameter of the positioning hole.
  • the expansion portion can be formed by the arrangement of the fixing member or the plastic frame, and the first and second embodiments described above can be specifically seen, and details are not described herein again.
  • the liquid crystal display device 30 can be a TFT-LCD (Thin Film Transistor-Liquid Crystal) Display, thin film field effect transistor liquid crystal display), can also be other types of liquid crystal display devices.
  • TFT-LCD Thin Film Transistor-Liquid Crystal
  • LCD Thin Film Transistor-Liquid Crystal

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  • 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)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

一种液晶显示装置及背光模组（10），背光模组（10）包括导光板（11）、光学膜片（12）、弹性体（13）以及定位柱（14）；其中，弹性体（13）支撑导光板（11）角落部位，光学膜片（12）设置于导光板（11）的背对弹性体（13）的一侧；定位柱（14）凸起设置于弹性体（13）的朝向光学膜片（12）的一侧，光学膜片（12）的边缘处至少设有一耳部（121），耳部（121）设有定位孔（122），定位孔（122）套设于定位柱（14）上，定位柱（14）至少部分突出定位孔（122）；定位柱（14）突出定位孔（122）的部分为膨胀部，膨胀部直径大于定位孔（122）的直径。液晶显示装置及背光模组（10），能够防止光学膜片（12）跳脱，保证背光模组（10）的光学品质。

Description

一种液晶显示装置及其背光模组
【技术领域】
本发明涉及液晶显示技术领域，特别是涉及一种液晶显示装置及其背光模组。
【背景技术】
液晶显示装置包括液晶面板及背光模组，背光模组为液晶面板的显示提供光线。其中，背光模组包括导光板和设于导光板出光面的若干光学膜片。背光模组中光学膜片定位的可靠性与否会影响到背光模组的光学品质。
现有技术中，定位光学膜片的一种方法为：橡胶体支撑导光板的四个角落部位，光学膜片设置于导光板背对橡胶体的一侧上，在橡胶体上设置向上凸起的固定柱，光学膜片套设于固定柱上，进一步在光学膜片上贴附胶带以定位光学膜片。
本申请发明人在长期研发中发现，现有技术中采用胶带进行固定光学膜片，在光学膜片受热膨胀时胶带松脱，进而造成光学膜片的跳脱，不能实现其定位作用，影响背光模组的光学品质。
【发明内容】
为了至少部分解决以上问题，本发明提出了一种液晶显示装置及其背光模组，能够防止光学膜片跳脱，保证背光模组的光学品质。
为解决上述技术问题，本发明采用的一个技术方案是：提供一种背光模组，包括：导光板、光学膜片、弹性体以及定位柱；其中，弹性体支撑导光板角落部位，光学膜片设置于导光板的背对弹性体的一侧；弹性体对应定位柱的位置设置有插孔，定位柱下端插设于插孔中，以使得定位柱凸起设置于弹性体的朝向光学膜片的一侧；光学膜片的边缘处至少设有一耳部，耳部设有定位孔，定位孔套设于定位柱上，定位柱至少部分突出定位孔；定位柱突出定位孔的部分为膨胀部，膨胀部直径大于定位孔的直径；弹性体为橡胶体。
其中，背光模组还包括固定件，固定件设有固定孔，固定件的固定孔对应套设于定位柱突出定位孔的部分而形成膨胀部。
其中，背光模组还包括胶框，设置于光学膜片背对导光板的一侧，胶框对应定位柱突出定位孔部分的位置设有固定孔，胶框的固定孔对应套设于定位柱突出定位孔的部分而形成膨胀部。
为解决上述技术问题，本发明采用的另一个技术方案是：提供一种背光模组，包括：导光板、光学膜片、弹性体以及定位柱；其中，弹性体支撑导光板角落部位，光学膜片设置于导光板的背对弹性体的一侧；定位柱凸起设置于弹性体的朝向光学膜片的一侧，光学膜片的边缘处至少设有一耳部，耳部设有定位孔，定位孔套设于定位柱上，定位柱至少部分突出定位孔；定位柱突出定位孔的部分为膨胀部，膨胀部直径大于定位孔的直径。
其中，背光模组还包括固定件，固定件设有固定孔，固定件的固定孔对应套设于定位柱突出定位孔的部分而形成膨胀部。
其中，背光模组还包括胶框，设置于光学膜片背对导光板的一侧，胶框对应定位柱突出定位孔部分的位置设有固定孔，胶框的固定孔对应套设于定位柱突出定位孔的部分而形成膨胀部。
其中，弹性体对应定位柱的位置设置有插孔，定位柱下端插设于插孔中。
其中，弹性体为橡胶体。
为解决上述技术问题，本发明采用的又一个技术方案是：提供一种液晶显示装置，包括：背光模组，其包括：导光板、光学膜片、弹性体以及定位柱；其中，弹性体支撑导光板角落部位，光学膜片设置于导光板的背对弹性体的一侧；定位柱凸起设置于弹性体的朝向光学膜片的一侧，光学膜片的边缘处至少设有一耳部，耳部设有定位孔，定位孔套设于定位柱上，定位柱至少部分突出定位孔；定位柱突出定位孔的部分为膨胀部，膨胀部直径大于定位孔的直径；液晶显示装置还包括显示面板，显示面板设置于光学膜片背对导光板的一侧。
其中，背光模组还包括固定件，固定件设有固定孔，固定件的固定孔对应套设于定位柱突出定位孔的部分而形成膨胀部。
其中，背光模组还包括胶框，设置于光学膜片背对导光板的一侧，胶框对应定位柱突出定位孔部分的位置设有固定孔，胶框的固定孔对应套设于定位柱突出定位孔的部分而形成膨胀部。
其中，弹性体对应定位柱的位置设置有插孔，定位柱下端插设于插孔中。
其中，弹性体为橡胶体。
本发明的有益效果是：区别于现有技术的情况，本发明实施方式通过将弹性体上的定位柱突出定位孔的部分设为膨胀部，膨胀部的直径大于定位孔的直径，通过直径较大的膨胀部的设计，能够防止光学膜片跳脱，保证背光模组的光学品质。
【附图说明】
图1是本发明背光模组第一实施方式中弹性体与定位柱组装前的立体示意图；
图2是本发明背光模组第一实施方式组装前的立体示意图；
图3是本发明背光模组第一实施方式组装前的截面示意图；
图4是本发明背光模组第一实施方式组装后的立体示意图；
图5是本发明背光模组第一实施方式组装后的截面示意图；
图6是本发明背光模组第二实施方式组装后的部分立体示意图；
图7是本发明背光模组第二实施方式组装前的部分立体示意图；
图8是本发明背光模组第二实施方式组装后的截面示意图；
图9是本发明液晶显示装置实施方式组装后的截面示意图。
【具体实施方式】
下面将结合本发明实施方式中的附图，对本发明实施方式中的技术方案进行清楚、完整地描述，显然，所描述的实施方式仅仅是本发明一部分实施方式，而不是全部的实施方式。基于本发明中的实施方式，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施方式，均属于本发明保护的范围。
请一并参阅图1、2、3、4、5。本发明背光模组10第一实施方式包括：导光板11、光学膜片12、弹性体13、定位柱14以及固定件15。
弹性体13设置于导光板11的角落处以支撑导光板11的角落部位，弹性体13是方体，并且在一角部挖去而形成方体槽，导光板11的角部形状与弹性体13的方体槽形状适配，使得导光板11的角部能够置于方体槽中。光学膜片12设置于导光板11的背对弹性体13的一侧。弹性体13为橡胶体，其数量可为四个，分别对应导光板11的四个角落而设置；四个弹性体13也可一体成型成为一个弹性体，此处不作过多限制。
定位柱14凸起设置于弹性体13的朝向光学膜片12的一侧。其中，弹性体13对应定位柱14的位置设置有插孔131，定位柱14下端可通过过盈配合等方式插设于插孔131中。此外，也可取消插孔131的设置，定位柱14直接固定于弹性体13上。定位柱14为不锈钢柱、铝柱、铝合金柱、铜柱或铁柱等。光学膜片12的边缘处至少设有一耳部121，耳部121设有定位孔122，定位孔122套设于定位柱14上，定位柱14至少部分突出定位孔122。
其中，定位柱14突出定位孔122的部分为膨胀部，膨胀部的直径大于定位孔122的直径。
在本实施方式中，通过固定件15的设计而形成膨胀部。具体如下：固定件15设有固定孔151，固定件15的固定孔151对应套设于定位柱14突出定位孔122的部分而形成膨胀部。固定件15的形状可为顶部为圆台，与顶部连接的底部为圆柱体，其中，圆柱体的直径大于定位孔122的直径。当固定件15的固定孔151与定位柱14的凹凸结构组装配合后，位于固定孔151之外的固定件15部分对其朝向的光学膜片12形成一定的覆盖区域，覆盖区域可有效地防止光学膜片12跳脱。固定件15的材料可为塑胶、橡胶等材料。在其他实施方式中，固定件15也可为圆柱体或矩形块等其他形状的部件。
可以理解，本发明背光模组第一实施方式通过固定件15开设固定孔151，固定件15的固定孔151对应套设于定位柱14突出定位孔122的部分而形成膨胀部，膨胀部的直径大于定位孔122的直径，通过直径较大的膨胀部的设计，能够防止光学膜片12跳脱，保证背光模组10的光学品质。
请一并参阅图6、7、8，本发明背光模组20第二实施方式包括：导光板21、光学膜片22、弹性体23、定位柱24以及胶框25。
弹性体23设置于导光板21的角落处以支撑导光板21的角落部位，光学膜片22设置于导光板21的背对弹性体23的一侧。定位柱24凸起设置于弹性体23的朝向光学膜片22的一侧。光学膜片22的边缘处至少设有一耳部221，耳部221设有定位孔222，定位孔222套设于定位柱24上，定位柱24至少部分突出定位孔222。
其中，定位柱24突出定位孔222的部分为膨胀部，膨胀部的直径大于定位孔222的直径。
在本实施方式中，通过胶框25的设计而形成膨胀部。具体如下：胶框25设置于光学膜片22背对导光板21的一侧，胶框25对应定位柱24突出定位孔222部分的位置设有固定孔251，胶框25的固定孔251套设于定位柱24的突出定位孔222部分。此处整个胶框25即为本发明实施方式所定义的膨胀部。胶框25的长度大于定位孔222的直径。当胶框25的固定孔251与定位柱24的凹凸结构组装配合后，位于固定孔251之外的胶框25部分对其朝向的光学膜片22形成一定的覆盖区域，覆盖区域可有效地防止光学膜片22跳脱。
可以理解，本发明背光模组20第二实施方式通过在胶框25对应定位柱24突出定位孔222部分的位置设置固定孔251，胶框25对应套设于定位柱24上而形成膨胀部，膨胀部的直径大于定位孔222的直径，通过直径较大的膨胀部的设计，能够防止光学膜片22跳脱，保证背光模组20的光学品质。
请一并参阅图1-9， 本发明液晶显示装置30实施方式包括显示面板31和背光模组（32、33、34、35）。
其中，背光模组（32、33、34、35）可以是如图1-8所示的背光模组，包括导光板32、光学膜片33、弹性体34以及定位柱35。弹性体34支撑导光板32角落部位。光学膜片33设置于导光板32的背对弹性体34的一侧。定位柱35凸起设置于弹性体34的朝向光学膜片33的一侧。光学膜片33的边缘处至少设有一耳部，耳部设有定位孔，定位孔套设于定位柱35上，定位柱35至少部分突出定位孔。显示面板31设置于光学膜片33背对导光板32的一侧。其中，定位柱35突出定位孔的部分为膨胀部，膨胀部直径大于定位孔的直径。可通过固定件或者胶框的设置而形成膨胀部，具体可见上述第一、第二实施方式，此处不再赘述。
液晶显示装置30可以为TFT-LCD（Thin Film Transistor-Liquid Crystal Display，薄膜场效应晶体管液晶显示器），也可为其他类型的液晶显示装置。
以上所述仅为本发明的实施方式，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (13)

  1. 一种背光模组，其中，包括：
    导光板、光学膜片、弹性体以及定位柱；
    其中，所述弹性体支撑导光板角落部位，所述光学膜片设置于导光板的背对弹性体的一侧；
    所述弹性体对应定位柱的位置设置有插孔，所述定位柱下端插设于插孔中，以使得所述定位柱凸起设置于弹性体的朝向光学膜片的一侧；
    所述光学膜片的边缘处至少设有一耳部，所述耳部设有定位孔，所述定位孔套设于定位柱上，所述定位柱至少部分突出定位孔；
    所述定位柱突出定位孔的部分为膨胀部，所述膨胀部直径大于定位孔的直径；
    所述弹性体为橡胶体。
  2. 根据权利要求1所述的背光模组，其中，
    所述背光模组还包括固定件，所述固定件设有固定孔，所述固定件的固定孔对应套设于定位柱突出定位孔的部分而形成膨胀部。
  3. 根据权利要求1所述的背光模组 ，其中，
    所述背光模组还包括胶框，设置于所述光学膜片背对导光板的一侧，所述胶框对应定位柱突出定位孔部分的位置设有固定孔，所述胶框的固定孔对应套设于定位柱突出定位孔的部分而形成膨胀部。
  4. 一种背光模组，其中，包括：
    导光板、光学膜片、弹性体以及定位柱；
    其中，所述弹性体支撑导光板角落部位，所述光学膜片设置于导光板的背对弹性体的一侧；
    所述定位柱凸起设置于弹性体的朝向光学膜片的一侧，所述光学膜片的边缘处至少设有一耳部，所述耳部设有定位孔，所述定位孔套设于定位柱上，所述定位柱至少部分突出定位孔；
    所述定位柱突出定位孔的部分为膨胀部，所述膨胀部直径大于定位孔的直径。
  5. 根据权利要求4所述的背光模组，其中，
    所述背光模组还包括固定件，所述固定件设有固定孔，所述固定件的固定孔对应套设于定位柱突出定位孔的部分而形成膨胀部。
  6. 根据权利要求4所述的背光模组，其中，
    所述背光模组还包括胶框，设置于所述光学膜片背对导光板的一侧，所述胶框对应定位柱突出定位孔部分的位置设有固定孔，所述胶框的固定孔对应套设于定位柱突出定位孔的部分而形成膨胀部。
  7. 根据权利要求4所述的背光模组，其中，
    所述弹性体对应定位柱的位置设置有插孔，所述定位柱下端插设于插孔中。
  8. 根据权利要求4所述的背光模组，其中，
    所述弹性体为橡胶体。
  9. 一种液晶显示装置，其中，包括：
    背光模组，其包括：
    导光板、光学膜片、弹性体以及定位柱；
    其中，所述弹性体支撑导光板角落部位，所述光学膜片设置于导光板的背对弹性体的一侧；
    所述定位柱凸起设置于弹性体的朝向光学膜片的一侧，所述光学膜片的边缘处至少设有一耳部，所述耳部设有定位孔，所述定位孔套设于定位柱上，所述定位柱至少部分突出定位孔；
    所述定位柱突出定位孔的部分为膨胀部，所述膨胀部直径大于定位孔的直径；
    所述液晶显示装置还包括显示面板，所述显示面板设置于所述光学膜片背对导光板的一侧。
  10. 根据权利要求9所述的液晶显示装置，其中，
    所述背光模组还包括固定件，所述固定件设有固定孔，所述固定件的固定孔对应套设于定位柱突出定位孔的部分而形成膨胀部。
  11. 根据权利要求9所述的液晶显示装置，其中，
    所述背光模组还包括胶框，设置于所述光学膜片背对导光板的一侧，所述胶框对应定位柱突出定位孔部分的位置设有固定孔，所述胶框的固定孔对应套设于定位柱突出定位孔的部分而形成膨胀部。
  12. 根据权利要求9所述的液晶显示装置，其中，
    所述弹性体对应定位柱的位置设置有插孔，所述定位柱下端插设于插孔中。
  13. 根据权利要求9所述的液晶显示装置，其中，
    所述弹性体为橡胶体。
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