WO2014012239A1 - 液晶显示装置及其背光模组 - Google Patents

液晶显示装置及其背光模组 Download PDF

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Publication number
WO2014012239A1
WO2014012239A1 PCT/CN2012/078914 CN2012078914W WO2014012239A1 WO 2014012239 A1 WO2014012239 A1 WO 2014012239A1 CN 2012078914 W CN2012078914 W CN 2012078914W WO 2014012239 A1 WO2014012239 A1 WO 2014012239A1
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WO
WIPO (PCT)
Prior art keywords
guide plate
light guide
column
optical film
backlight module
Prior art date
Application number
PCT/CN2012/078914
Other languages
English (en)
French (fr)
Inventor
余亚军
萧宇均
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 US13/578,620 priority Critical patent/US8902377B2/en
Priority to DE201211006575 priority patent/DE112012006575T5/de
Publication of WO2014012239A1 publication Critical patent/WO2014012239A1/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
    • 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
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • 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
    • 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 technology, and in particular to a display device and a backlight module thereof.
  • the prior art liquid crystal display includes 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. The assembly of the optical film in the backlight module relative to the light guide plate directly affects the optical quality of the backlight module.
  • one method of positioning the optical film is to hang the optical film on the stud of the positioning light guide plate, but the optical film is easy to jump out of the riveting column, and even jumps out of the riveting column when expanding due to high temperature.
  • the light guide plate is instantaneously impacted, causing the light guide plate to rupture at the position of the stud.
  • Another method for positioning an optical film in the prior art is that the four corners of the optical film are provided with punching holes, and the rubber frame is used to fix the light guiding plate from four corners, and absorb the expansion and contraction of the light guiding plate while being in rubber
  • the upper surface of the frame is provided with a convex cylindrical structure with the same material as the rubber frame, and the optical film is hung from the four corners.
  • the optical film is punched at a sharp position, and the convex cylindrical structure on the rubber frame is the same as the rubber frame. The strength is poor.
  • the optical film After the optical film is hung on the convex cylindrical structure of the rubber frame, the optical The slight movement of the diaphragm will directly cut the convex cylindrical structure of the rubber frame, so that the rubber frame loses the function of positioning the optical film, resulting in the position of the optical film in the backlight module being disordered, and the assembly efficiency is greatly reduced. Affects optical quality.
  • the present invention provides a liquid crystal display device and a backlight module thereof, which can improve the reliability of positioning of the optical film in the backlight module and ensure the optical quality of the backlight module.
  • a technical solution adopted by the present invention is to provide a backlight module, including: a light guide plate, an optical film, an elastic plastic frame, and a fixing column; at least a corner of the light guide plate is fixed to the elastic plastic frame;
  • the pillar protrusion is disposed on the top surface of the elastic plastic frame, the optical film is disposed above the light guide plate, and the optical film is provided with a perforation at a corner of the optical film, and the light film is sleeved on the fixing column by using the perforation to be positioned opposite to the light guide plate;
  • the strength of the fixing column is greater than the strength of the elastic plastic frame;
  • the top surface of the elastic plastic frame is provided with a socket, and the lower end of the fixing column is inserted into the insertion hole in an interference fit manner;
  • the surface of the elastic plastic frame contacting the light guide plate is provided with multiple Vertical through slot.
  • the elastic plastic frame is a rubber frame.
  • the fixed column is a stainless steel column, an aluminum column, an aluminum alloy column, a copper column or an iron column.
  • the number of the elastic plastic frames is four, corresponding to the four corners of the light guide plate, and is L-shaped, and is adapted to the shape of the corner of the light guide plate.
  • the optical film is provided with an ear portion corresponding to the position of the fixing column, and the through hole is disposed at the ear portion.
  • a backlight module including: a light guide plate, an optical film, an elastic plastic frame, and a fixing column; at least a corner of the light guide plate is fixed to the elastic plastic frame;
  • the fixing post is disposed on the top surface of the elastic plastic frame, the optical film is disposed above the light guiding plate, and the optical film is provided with a perforation at a corner thereof, and the light film is sleeved on the fixing column and positioned opposite to the light guiding plate.
  • the strength of the fixed column is greater than the strength of the elastic frame.
  • the top surface of the elastic plastic frame is provided with a jack, and the lower end of the fixing column is inserted into the jack in an interference fit manner.
  • the surface of the elastic plastic frame contacting the light guide plate is provided with a plurality of vertical through grooves.
  • the elastic plastic frame is a rubber frame.
  • the fixed column is a stainless steel column, an aluminum column, an aluminum alloy column, a copper column or an iron column.
  • the number of the elastic plastic frames is four, corresponding to the four corners of the light guide plate, and is L-shaped, and is adapted to the shape of the corner of the light guide plate.
  • the optical film is provided with an ear portion corresponding to the position of the fixing column, and the through hole is disposed at the ear portion.
  • a liquid crystal display device comprising: a display panel; and a backlight module disposed under the display panel, comprising: a light guide plate, an optical film, and an elastic glue
  • the frame and the fixing column at least the corner of the light guide plate is fixed to the elastic plastic frame; the fixing column protrusion is disposed on the top surface of the elastic plastic frame, the optical film is disposed above the light guide plate, and the optical film is provided with a perforation at the corner of the optical film, the optical film
  • the sheet is sleeved on the fixing post and positioned opposite to the light guide plate; the strength of the fixing column is greater than the strength of the elastic plastic frame.
  • the top surface of the elastic plastic frame is provided with a jack, and the lower end of the fixing column is inserted into the jack in an interference fit manner.
  • the surface of the elastic plastic frame contacting the light guide plate is provided with a plurality of vertical through grooves.
  • the beneficial effects of the present invention are: different from the prior art, the present invention is provided on the top surface of the elastic plastic frame by the protrusion of the fixing post, and the optical film is sleeved on the fixing column by the perforation at the corner of the optical film.
  • the relative position of the light plate is different, wherein the strength of the fixing column is greater than the strength of the elastic plastic frame, so that the fixing column is not easily cut off by the optical film, the reliability of the optical film positioning in the backlight module can be improved, and the optical quality of the backlight module is ensured.
  • FIG. 1 is a partially exploded perspective view showing the embodiment of the backlight module of the present invention before assembly
  • FIG. 2 is a partial perspective assembly view of the backlight module of the present invention after assembly
  • FIG. 3 is a perspective view showing the structure of an elastic plastic frame according to an embodiment of a backlight module of the present invention
  • FIG. 4 is a schematic view showing the structure of an embodiment of a liquid crystal display device of the present invention.
  • FIG. 1 is a partially exploded perspective view of the backlight module 10 of the present invention before assembly.
  • FIG. 2 is a partial perspective assembly view of the backlight module 10 of the present invention.
  • the backlight module 10 of the embodiment of the present invention includes a light guide plate 11, an optical film 13, an elastic plastic frame 12, and a fixing post 14.
  • the light guide plate 11 has a rectangular shape.
  • the elastic frame 12 is designed to have a groove on the side, and the shape of the side groove of the elastic frame 12 is adapted to the shape of the corner of the rectangular light guide plate, so that at least the corner of the light guide plate 11 is fixed to the elastic frame 12.
  • the fixing post 14 is convexly disposed on the top surface of the elastic plastic frame 12 .
  • the optical film 13 is disposed above the light guide plate 11.
  • a perforation 131 is provided at a corner of the optical film 13.
  • the plurality of light diaphragms 13 are positioned opposite to the light guide plate 11 by the respective through holes 131 at the corners thereof and then sequentially sleeved on the fixing posts 14.
  • the strength of the fixing post 14 is greater than the strength of the elastic frame 12 to ensure that the sharp perforation 131 on the optical film 13 does not directly cut the fixing post 14 when the optical film 13 sleeved on the fixing post 14 is slightly moved. The function of positioning the optical film 13 by the elastic frame 12 is lost.
  • the optical film 13 is provided with an ear portion 132 corresponding to the position of the fixing post 14, and the through hole 131 is disposed on the ear portion 132, so that the optical film 13 is sleeved on the fixing post 14 with its through hole 131 to be positioned opposite to the light guide plate 11.
  • the number of the elastic plastic frames 12 is four, and the four corners corresponding to the light guide plate 11 are respectively fixed at the four corners of the back plate 15, and the shape of the elastic plastic frame 12 is L-shaped, and the inner side constitutes the above-mentioned groove structure, thereby The shape is adapted to the corner of the light guide plate 11 fixed thereto.
  • the four elastic frames 12 can also be integrally formed, and the elastic frame is integrally fixed to the back plate 15, which is not limited thereto.
  • FIG. 3 is a schematic perspective structural view of an elastic plastic frame 20 according to an embodiment of a backlight module of the present invention.
  • the top surface of the elastic plastic frame 20 is provided with a socket 201, and the lower end of the fixing post 21 is inserted into the insertion hole 201 in an interference fit manner (of course, the cross-sectional diameter of the fixing post 21 is larger than the cross-sectional diameter of the insertion hole, and the column of the fixed column The body length is greater than the depth of the jack).
  • the specific interference fit method is as follows: the lower end of the fixing column 21 can be squeezed into the insertion hole 201 by using a tool; the fixing column 21 can be cooled in the dry ice by using the property of thermal expansion and contraction of the material, and the elastic plastic frame can be used.
  • the fixing post 21 is quickly inserted into the insertion hole 201, and after the fixing post 21, the elastic plastic frame 20 or both return to normal temperature, an interference fit can be formed.
  • the jack 201 and the fixing post 21 may be correspondingly arranged in other shapes such as a rectangle; or the setting of the top surface jack 201 of the elastic plastic frame 20 may be omitted, and the fixing post 21 may be directly cast or molded.
  • the manner of fixing to the top surface of the elastic plastic frame 20 can also achieve the same effect, and is not limited herein.
  • a plurality of vertical through grooves 202 are provided on the inner surface of the surface of the elastic plastic frame 20 that is in contact with the light guide plate (not shown), and the light guide plate can be absorbed.
  • the amount of expansion by heat absorption reduces or eliminates the risk of thermal expansion and contraction of the light guide plate to cut off the fixed column.
  • the combination of the high-strength fixed column and the vertical through groove 202 can better enhance the role of the fixed column.
  • the light guide plate can be well positioned to avoid cracking of the light guide plate.
  • the elastic frame 20 in this embodiment is a rubber frame or other elastic body.
  • the fixing column 21 in the embodiment is a stainless steel column; in other embodiments, the fixing column 21 can also be made of other materials having a certain rigidity, such as an aluminum column, an aluminum alloy column, a copper column or an iron column, etc. Too many restrictions.
  • FIG. 4 is a schematic structural diagram of an embodiment of a liquid crystal display device 30 of the present invention.
  • the present invention further discloses a liquid crystal display device 30, which includes a display panel 301 and a backlight module 302 disposed under the display panel 301.
  • the backlight module 302 includes a light guide plate 11, an optical film 13, an elastic plastic frame 12, and a fixed portion.
  • the column 14 is fixed to the elastic plastic frame 12, and the elastic plastic frame 12 is designed to have a groove on the side, and the shape of the side groove of the elastic frame 12 is adapted to the shape of the corner of the rectangular light guide plate.
  • the optical film 13 is disposed on the top surface of the elastic plastic frame 12, and the optical film 13 is disposed on the top surface of the optical film 13.
  • the optical film 13 is disposed at a corner of the optical film 13.
  • the plurality of optical films 13 are sequentially sleeved on the fixing post 14 and positioned opposite to the light guide plate 11 by using the through holes 131 thereof.
  • the strength of the fixing post 14 is greater than the strength of the elastic frame 12 to ensure that the sharp perforation 131 on the optical film 13 does not directly cut the fixing post 14 when the optical film 13 sleeved on the fixing post 14 is slightly moved.
  • the function of the optical frame 12 is lost.
  • the top surface of the elastic frame 12 is provided with a jack 121.
  • the lower end of the fixing post 14 is inserted into the jack 121 in an interference fit manner. A specific description of the interference fit mode is adopted in the manner; the surface of the elastic plastic frame 12 that is in contact with the light guide plate 11 is provided with a plurality of vertical through grooves 122.
  • the liquid crystal display device may be a TFT-LCD liquid crystal module or other types of liquid crystal display devices, and is not limited herein.
  • the liquid crystal display device of the present invention and the backlight module thereof are arranged on the top surface of the elastic plastic frame 12 by the above-mentioned manner, and the optical film 13 is sleeved by the through holes 131 at the corners thereof.
  • the fixing post 14 is positioned opposite to the light guide plate 11 , wherein the strength of the fixing post 14 is greater than the strength of the elastic plastic frame 12 , so that the fixing post 14 is not easily cut off by the optical film 13 , and the optical film in the backlight module can be improved.
  • the reliability of the positioning of the film 13 ensures the optical quality of the backlight module.

Abstract

提供了一种背光模组（10）及一种液晶显示装置（30）。所述背光模组（10）包括导光板（11）、光学膜片（13）、弹性胶框（12，20）以及固定柱（14，21）；至少导光板（11）的角落固定于弹性胶框（12，20）；固定柱（14，21）凸起设置于弹性胶框（12，20）的顶面，光学膜片（13）设置于导光板（11）上方，光学膜片（13）的角落处设有穿孔（131），光学膜片（13）利用其穿孔（131）套设于固定柱（14，21）上而与导光板（11）相对定位；固定柱（14，21）的强度大于弹性胶框（12，20）的强度。通过上述方式，能够提高背光模组（10）中光学膜片（13）定位的可靠性并保证背光模组（10）的光学品质。

Description

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，特别是涉及显示装置及其背光模组。
【背景技术】
现有技术液晶显示器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相对于导光板的组装好坏会直接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：将光学膜片挂在定位导光板的铆柱上，但光学膜片容易跳脱出铆柱，甚至在因高温膨胀时而跳脱出铆柱的瞬间冲击导光板，致使导光板在铆柱位置破裂。
现有技术中定位光学膜片的另一种方法为：光学膜片的四个角落设有冲孔，此外利用橡胶框从四个角落固定导光板，并吸收导光板的涨缩，同时在橡胶框的上表面设置材质与橡胶框一样的凸起的圆柱结构，从四个角落来挂住光学膜片。在组装时，由于光学膜片冲孔位置较锋利，且橡胶框上凸起的圆柱结构与橡胶框材质一样，强度较差，将光学膜片挂到橡胶框凸起的圆柱结构上后，光学膜片的轻微移动就会将橡胶框凸起的圆柱结构直接削断，使橡胶框失去定位光学膜片的功能，导致导致光学膜片在背光模组里的位置错乱，大大降低组装的效率，影响光学品质。
【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，能够提高背光模组中光学膜片定位的可靠性并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、弹性胶框以及固定柱；至少导光板的角落固定于弹性胶框；固定柱凸起设置于弹性胶框的顶面，光学膜片设置于导光板上方，光学膜片的角落处设有穿孔，光线膜片利用其穿孔套设于固定柱上而与导光板相对定位；固定柱的强度大于弹性胶框的强度；弹性胶框的顶面设置有插孔，固定柱下端以过盈配合方式插设于插孔中；弹性胶框与导光板接触的表面设有多个竖向通槽。
其中，弹性胶框是橡胶框。
其中，固定柱是不锈钢柱、铝柱、铝合金柱、铜柱或铁柱。
其中，弹性胶框数量为四，对应于导光板的四个角落设置，并且为L型，与导光板角落处形状适配。
其中，光学膜片对应固定柱的位置设有耳部，穿孔设于耳部。
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、弹性胶框以及固定柱；至少导光板的角落固定于弹性胶框；固定柱凸起设置于弹性胶框的顶面，光学膜片设置于导光板上方，光学膜片的角落处设有穿孔，光线膜片利用其穿孔套设于固定柱上而与导光板相对定位；固定柱的强度大于弹性胶框的强度。
其中，弹性胶框的顶面设置有插孔，固定柱下端以过盈配合方式插设于插孔中。
其中，弹性胶框与导光板接触的表面设有多个竖向通槽。
其中，弹性胶框是橡胶框。
其中，固定柱是不锈钢柱、铝柱、铝合金柱、铜柱或铁柱。
其中，弹性胶框数量为四，对应于导光板的四个角落设置，并且为L型，与导光板角落处形状适配。
其中，光学膜片对应固定柱的位置设有耳部，穿孔设于耳部。
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：显示面板；背光模组，设置于显示面板下方，其包括：导光板、光学膜片、弹性胶框以及固定柱；至少导光板的角落固定于弹性胶框；固定柱凸起设置于弹性胶框的顶面，光学膜片设置于导光板上方，光学膜片的角落处设有穿孔，光学膜片利用其穿孔套设于固定柱上而与导光板相对定位；固定柱的强度大于弹性胶框的强度。
其中，弹性胶框的顶面设置有插孔，固定柱下端以过盈配合方式插设于插孔中。
其中，弹性胶框与导光板接触的表面设有多个竖向通槽。
本发明的有益效果是：区别于现有技术的情况，本发明通过将固定柱凸起设置于弹性胶框的顶面，光学膜片利用其角落处的穿孔套设于固定柱上而与导光板相对定位，其中，固定柱的强度大于弹性胶框的强度，使得固定柱不容易被光学膜片削掉，能够提高背光模组中光学膜片定位的可靠性并保证背光模组的光学品质。
【附图说明】
图1是本发明背光模组实施方式组装前的部分立体分解示意图；
图2是本发明背光模组实施方式组装后的部分立体组装示意图；
图3是本发明背光模组实施方式的弹性胶框的立体结构示意图；
图4是本发明液晶显示装置实施方式的结构示意图。
【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，图1是本发明背光模组10实施方式组装前的部分立体分解示意图，图2是本发明背光模组10实施方式组装后的部分立体组装示意图。
本发明实施方式的背光模组10包括导光板11、光学膜片13、弹性胶框12以及固定柱14。
在本实施方式中，导光板11为矩形。弹性胶框12设计为侧边具有凹槽的结构，而弹性胶框12侧边凹槽的形状与矩形导光板角落的形状适配，以使得至少导光板11的角落固定于弹性胶框12。
固定柱14凸起设置于弹性胶框12的顶面。光学膜片13设置于导光板11上方。光学膜片13的角落处设有穿孔131。多个光线膜片13利用其角落处的各自穿孔131进而依次序套设于固定柱14上而实现与导光板11相对定位。其中，固定柱14的强度大于弹性胶框12的强度，以保证套设于固定柱14上的光学膜片13轻微移动时，光学膜片13上锋利的穿孔131不会直接削断固定柱14而失去弹性胶框12定位光学膜片13的功能。
进一步，光学膜片13对应固定柱14的位置设有耳部132，穿孔131设于耳部132，以便光学膜片13利用其穿孔131套设于固定柱14上而与导光板11相对定位。
弹性胶框12的数量为四个，分别对应于导光板11的四个角落固定于背板15的四角，并且弹性胶框12的形状为L型，内侧边构成上述的凹槽结构，从而与固定于其上的导光板11角落处形状适配。在其他实施方式中，四个弹性胶框12也可一体成型，设置成为一个弹性胶框整体固定于背板15上，此处不作过多限制。
请参阅图3，图3为本发明背光模组实施方式的弹性胶框20的立体结构示意图。
弹性胶框20的顶面设置有插孔201，固定柱21下端以过盈配合的方式插设于插孔201中（当然，固定柱21的截面直径大于插孔的截面直径，固定柱的柱体长度大于插孔的深度）。具体的过盈配合方法为：可采用工具将固定柱21的下端挤压进插孔201内；也可利用物质热胀冷缩的特性，将固定柱21放在干冰里冷却、将弹性胶框20加热或两者均进行操作，然后迅速将固定柱21插设于插孔201中，待固定柱21、弹性胶框20或两者回复常温后，即可形成过盈配合。在其他实施方式中，插孔201、固定柱21也可对应设置为如矩形等其他形状；也可选择取消弹性胶框20顶面插孔201的设置，固定柱21直接以浇铸或模铸等的方式固定于弹性胶框20的顶面，也可实现相同效果，此处不作过多限制。
此外，为防止导光板受热膨胀导致固定柱受过大剪切力，在弹性胶框20与导光板（图未示）接触的表面即内侧面设有多个竖向通槽202，可以吸收导光板受热吸湿的膨胀量来减轻或消除导光板热胀冷缩而削掉固定柱的风险，具备高强度的固定柱与竖向通槽202的设置共同作用可以更好地起到加强固定柱的作用，同时也可很好地定位导光板，避免导光板出现破裂的情况。
本实施方式中的弹性胶框20为橡胶框或其他具有弹性的物体。本实施方式中的固定柱21为不锈钢柱；在其他实施方式中，固定柱21也可采用其他具有一定刚性硬度的材质，如铝柱、铝合金柱、铜柱或铁柱等，此处不作过多限制。
请一并参阅图1、4，图4是本发明液晶显示装置30实施方式的结构示意图。
本发明进一步公开了一种液晶显示装置30，其包括显示面板301、设置于显示面板301下方的背光模组302，背光模组302包括导光板11、光学膜片13、弹性胶框12以及固定柱14；导光板11的角落固定于弹性胶框12，弹性胶框12设计为侧边具有凹槽的结构，而弹性胶框12侧边凹槽的形状与矩形导光板角落的形状适配，以使得至少导光板11的角落固定于弹性胶框12；固定柱14凸起设置于弹性胶框12的顶面，光学膜片13设置于导光板11上方，光学膜片13的角落处设有穿孔131，多个光学膜片13利用其穿孔131依次序套设于固定柱14上而与导光板11相对定位。
其中，固定柱14的强度大于弹性胶框12的强度，以保证套设于固定柱14上的光学膜片13轻微移动时，光学膜片13上锋利的穿孔131不会直接削断固定柱14而失去弹性胶框12定位光学膜片13的功能；弹性胶框12的顶面设置有插孔121，固定柱14下端以过盈配合方式插设于插孔121中，此处可参阅上述实施方式中对于过盈配合方式的具体描述；弹性胶框12与导光板11接触的表面设有多个竖向通槽122。液晶显示装置可以为TFT-LCD液晶模组，也可为其它类型的液晶显示装置，此处不作过多限制。
区别于现有技术，本发明的液晶显示装置及其背光模组通过上述方式，将固定柱14凸起设置于弹性胶框12的顶面，光学膜片13利用其角落处的穿孔131套设于固定柱14上而与导光板11相对定位，其中，固定柱14的强度大于弹性胶框12的强度，使得固定柱14不容易被光学膜片13削掉，能够提高背光模组中光学膜片13定位的可靠性并保证背光模组的光学品质。
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 (15)

  1. 一种背光模组，其中，包括：
    导光板、光学膜片、弹性胶框以及固定柱；
    至少所述导光板的角落固定于弹性胶框；
    所述固定柱凸起设置于弹性胶框的顶面，所述光学膜片设置于导光板上方，所述光学膜片的角落处设有穿孔，所述光线膜片利用其穿孔套设于固定柱上而与导光板相对定位；
    所述固定柱的强度大于弹性胶框的强度；
    所述弹性胶框的顶面设置有插孔，所述固定柱下端以过盈配合方式插设于插孔中；
    所述弹性胶框与导光板接触的表面设有多个竖向通槽。
  2. 根据权利要求1所述的背光模组，其中，
    所述弹性胶框是橡胶框。
  3. 根据权利要求1所述的背光模组 ，其中，
    所述固定柱是不锈钢柱、铝柱、铝合金柱、铜柱或铁柱。
  4. 根据权利要求1所述的背光模组 ，其中，
    所述弹性胶框数量为四，对应于导光板的四个角落设置，并且为L型，与导光板角落处形状适配。
  5. 根据权利要求1所述的背光模组 ，其中，
    所述光学膜片对应固定柱的位置设有耳部，所述穿孔设于耳部。
  6. 一种背光模组，其中，包括：
    导光板、光学膜片、弹性胶框以及固定柱；
    至少所述导光板的角落固定于弹性胶框；
    所述固定柱凸起设置于弹性胶框的顶面，所述光学膜片设置于导光板上方，所述光学膜片的角落处设有穿孔，所述光线膜片利用其穿孔套设于固定柱上而与导光板相对定位；
    所述固定柱的强度大于弹性胶框的强度。
  7. 根据权利要求6所述的背光模组，其中，
    所述弹性胶框的顶面设置有插孔，所述固定柱下端以过盈配合方式插设于插孔中。
  8. 根据权利要求6所述的背光模组，其中，
    所述弹性胶框与导光板接触的表面设有多个竖向通槽。
  9. 根据权利要求6所述的背光模组，其中：
    所述弹性胶框是橡胶框。
  10. 根据权利要求6所述的背光模组，其中，
    所述固定柱是不锈钢柱、铝柱、铝合金柱、铜柱或铁柱。
  11. 根据权利要求6所述的背光模组，其中，
    所述弹性胶框数量为四，对应于导光板的四个角落设置，并且为L型，与导光板角落处形状适配。
  12. 根据权利要求6所述的背光模组，其中，
    所述光学膜片对应固定柱的位置设有耳部，所述穿孔设于耳部。
  13. 一种液晶显示装置，其中，包括：
    显示面板；
    背光模组，设置于显示面板下方，其包括：
    导光板、光学膜片、弹性胶框以及固定柱；
    至少所述导光板的角落固定于弹性胶框；
    所述固定柱凸起设置于弹性胶框的顶面，所述光学膜片设置于导光板上方，所述光学膜片的角落处设有穿孔，所述光学膜片利用其穿孔套设于固定柱上而与导光板相对定位；
    所述固定柱的强度大于弹性胶框的强度。
  14. 根据权利要求13所述的液晶显示装置，其中，
    所述弹性胶框的顶面设置有插孔，所述固定柱下端以过盈配合方式插设于插孔中。
  15. 根据权利要求13所述的液晶显示装置，其中，
    所述弹性胶框与导光板接触的表面设有多个竖向通槽。
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