WO2014172993A1 - 背光模组及其膜片定位结构 - Google Patents

背光模组及其膜片定位结构 Download PDF

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Publication number
WO2014172993A1
WO2014172993A1 PCT/CN2013/078055 CN2013078055W WO2014172993A1 WO 2014172993 A1 WO2014172993 A1 WO 2014172993A1 CN 2013078055 W CN2013078055 W CN 2013078055W WO 2014172993 A1 WO2014172993 A1 WO 2014172993A1
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WIPO (PCT)
Prior art keywords
positioning
base
diaphragm
backlight module
post
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Ceased
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PCT/CN2013/078055
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English (en)
French (fr)
Inventor
曾大伟
俞刚
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Publication of WO2014172993A1 publication Critical patent/WO2014172993A1/zh
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    • 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

Definitions

  • the present invention relates to the field of liquid crystal display technologies, and in particular, to a backlight module and a diaphragm positioning structure thereof.
  • the backlight module is mainly composed of a light source, a reflection sheet, an optical film, a light guide plate, a back plate and the like.
  • the optical film with prism structure mainly functions to condense light.
  • Some types of optical brightness-enhancing film and polarizer can reflect, recover and reuse polarized light that cannot pass through the polarizing plate to improve the effective utilization of light. This requires accurate positioning and installation of the optical film, and high installation accuracy.
  • the backlight module In the assembly process of the backlight module, most of the optical film is positioned by using the rivet column on the back plate. A positioning hole is formed in the optical film, and the rivet column passes through the positioning hole to realize positioning of the optical film.
  • the backlight module design tends to be thinner, so that the height of the rivet column can not be too high, and the upper end of the rivet column is usually exposed to about 0.5 ⁇ 0.8 mm.
  • the backlight module is prone to diaphragm breakage during the moving process. The problem of displacement causes problems such as wrinkles and warpage of the diaphragm.
  • the main object of the present invention is to provide a backlight module and a diaphragm positioning structure thereof, which are intended to prevent the optical film from jumping off and ensure the optical quality of the backlight module.
  • the present invention provides a diaphragm positioning structure, including a back plate and a positioning member, the positioning member includes a base and a positioning post, the base is fixedly connected to the back plate, and the positioning post is telescopically disposed on the The base protrudes from a side of the backing plate facing the diaphragm.
  • the positioning member further comprises an elastic body
  • the base is provided with a guiding hole
  • the elastic body and the positioning post are sequentially disposed in the guiding hole
  • the elastic body is sandwiched in the guiding hole Between the bottom surface and the positioning post.
  • the elastomer is a spring.
  • the base comprises a base body and a cylinder extending from the inner portion of the central portion of the base body, and the guide hole is disposed on the cylinder.
  • the present invention also provides a backlight module including a diaphragm positioning structure, a reflective sheet, a light guide plate and a diaphragm, the diaphragm positioning structure including a back plate and a positioning member, the positioning member including a base and a positioning post,
  • the base is fixedly connected to the back plate, and the positioning post is telescopically disposed on the base and protrudes from a side of the back plate facing the diaphragm, and the reflective sheet, the light guide plate and the diaphragm are sequentially placed on the
  • the diaphragm is provided with a positioning hole adapted to the positioning post, and the diaphragm is coordinated by the positioning hole and the positioning post.
  • the positioning member further includes an elastic body, and the base is provided with a guide hole, and the elastic body and the positioning post are sequentially disposed in the guide hole, and the elastic body clip The bottom surface of the guiding hole is disposed between the positioning post.
  • the elastic body is a spring.
  • the base includes a base body and a column extending from a middle portion of the base body, and the guide hole is disposed on the column body.
  • the backlight module further includes a plastic frame disposed above the diaphragm, and the positioning post is inwardly retracted under the pressing force of the plastic frame.
  • the outer end of the positioning post is more than 2 to 5 mm than the outermost surface of the diaphragm before being pressed by the plastic frame.
  • the outer end of the positioning post is 0.5 to 0.8 mm higher than the outermost surface of the diaphragm after being pressed by the plastic frame.
  • the present invention also provides a diaphragm positioning structure, including a back plate and a positioning member, the positioning member includes a base, a positioning post and an elastic body, the base is fixedly connected with the back plate, and the positioning post is passed through the elastic body And being telescopically disposed on the base and protruding from a side of the back plate facing the diaphragm.
  • the elastomer is a spring.
  • the base comprises a base body and a column extending from the inner portion of the central portion of the base body, the column body is provided with a guide hole, and the elastic body and the positioning post are sequentially disposed on the guide hole
  • the elastic body is interposed between the bottom surface of the guide hole and the positioning post, and the outer end of the positioning post protrudes from the outer end of the cylinder.
  • the backlight module of the invention and the diaphragm positioning structure thereof are arranged by positioning a retractable positioning post on the base, and when assembling the diaphragm, the positioning post protrudes outward to provide a longer length for the diaphragm. Positioning can prevent the diaphragm from jumping and shifting, effectively reducing the waste of working hours and abnormal quality caused by the tripping and displacement of the diaphragm, improving the productivity and product yield, and ensuring the optical quality of the backlight module.
  • the positioning post is inwardly retracted under the pressure of the plastic frame, so that the assembly of the plastic frame is not affected.
  • FIG. 1 is a schematic structural view of a backlight module according to a preferred embodiment of the present invention, in which no plastic frame is provided.
  • FIG. 2 is a schematic structural view of a diaphragm positioning structure in the backlight module shown in FIG. 1.
  • FIG. 3 is a schematic structural view of the backlight module of FIG. 1 after the plastic frame is disposed.
  • FIG. 1 to FIG. 3 a preferred embodiment of the backlight module of the present invention is shown.
  • the backlight module includes a diaphragm positioning structure 10, a reflective sheet 20, a light guide plate 30, and a diaphragm 40.
  • the diaphragm positioning structure 10 includes a back plate 11 and a positioning member 12, and the positioning member 12 includes a base 121, a positioning post 122 and an elastic body 123.
  • the base 121 is fixedly connected to the back plate 11.
  • the base 121 is provided with a guide hole 124.
  • the elastic body 123 and the positioning post 122 are sequentially disposed in the guide hole 124.
  • the elastic body 123 is sandwiched between the bottom surface of the guide hole 124 and the positioning post 122. .
  • the elastomer 123 is selected from an element capable of generating a spring restoring force, preferably a spring.
  • the base 121 includes a base body 125 and a column 126 extending from a central portion of the base body 125.
  • the guide hole 124 is disposed on the column body 126.
  • the positioning post 122 is telescopically disposed in the guide hole 124 of the base 121 through the elastic body 123 and protrudes from the side of the back plate 11 facing the diaphragm 40.
  • the reflective sheet 20, the light guide plate 30 and the diaphragm 40 are sequentially placed on the back plate 11.
  • the diaphragm 40 is provided with a positioning hole 41 adapted to the positioning post 122.
  • the diaphragm 40 is positioned by the positioning hole 41 and the positioning post 122. .
  • the backlight module further includes a plastic frame 50 disposed above the diaphragm 40 , and the positioning post 122 is inwardly retracted by the pressing force of the plastic frame 50 .
  • the outer end of the positioning post 122 is more than 2 to 5 mm from the outermost surface of the diaphragm 40 before being pressed by the bezel 50.
  • the positioning post 122 is inwardly retracted by a pressing force of the frame 50, so that the positioning post 122 is only 0.5-0.8 mm higher than the diaphragm, thereby meeting the installation requirements of the frame 50.
  • the backlight module and the diaphragm positioning structure thereof are arranged by positioning a retractable positioning post on the base.
  • the positioning post protrudes outward to provide a longer length for the diaphragm positioning. It can prevent the diaphragm from jumping and shifting, effectively reduce the waste of working hours and abnormal quality caused by the tripping and displacement of the diaphragm, improve the productivity and product yield, and ensure the optical quality of the backlight module.
  • the positioning post is inwardly retracted under the pressure of the plastic frame, so that the assembly of the plastic frame is not affected.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)

Abstract

一种膜片定位结构（10），包括背板（11）及定位件（12），该定位件（12）包括底座（121）和定位柱（122），该底座（121）与背板（11）固定连接，该定位柱（122）可伸缩地设置于底座（121）上并凸出于背板（11）朝向膜片（40）的一侧。该膜片定位结构（10），通过在底座（121）上设置可伸缩的定位柱（122）来对膜片（40）进行定位，在组装膜片（40）时，定位柱（122）向外伸出以提供更长的长度供膜片（40）定位，可以防止膜片（40）跳脱、移位，有效减少因膜片（40）跳脱、移位所带来的工时浪费及品质异常损伤，提高产能及产品良率，保证背光模组的光学品质。还提供一种采用该膜片定位结构（10）的背光模组。

Description

背光模组及其膜片定位结构
技术领域
本发明涉及液晶显示技术领域，尤其涉及一种背光模组及其膜片定位结构。
背景技术
背光模组主要由发光源、反射片、光学膜片、导光板、背板等相关器件组成。具棱镜结构的光学膜片主要作用是凝聚光线，部分类型的光学增亮膜片与偏光片搭配可将无法透过偏振片的偏振光反射、回收、再利用，以提高光的有效利用率。这就要求光学膜片定位安装准确，安装精度要求较高。
目前，背光模组在组装过程中，绝大多数光学膜片的定位方式是使用背板上的铆钉柱来完成的。光学膜片上开有定位孔，铆钉柱穿过定位孔，实现对光学膜片的定位。然而，背光模组设计趋于薄型化，使得铆钉柱的高度不能过高，铆钉柱上端部通常露出0.5~0.8毫米左右，实际组装过程中，背光模组在移动过程中容易出现膜片跳脱、位移的问题，导致出现膜片褶皱、翘曲等问题。
发明内容
本发明的主要目的在于提供一种背光模组及其膜片定位结构，旨在防止光学膜片跳脱，保证背光模组的光学品质。
为了实现上述目的，本发明提供一种膜片定位结构，包括背板及定位件，所述定位件包括底座和定位柱，所述底座与背板固定连接，所述定位柱可伸缩地设置于所述底座上并凸出于所述背板朝向膜片的一侧。
优选地，所述定位件进一步包括弹性体，所述底座上设有导孔，所述弹性体和所述定位柱依次设于所述导孔内，所述弹性体夹设于所述导孔的底面与所述定位柱之间。
优选地，所述弹性体为弹簧。
优选地，所述底座包括座体及由所述座体的中部内上延伸的柱体，所述导孔设于所述柱体上。
本发明还提供一种背光模组，包括膜片定位结构、反射片、导光板及膜片，所述膜片定位结构包括背板及定位件，所述定位件包括底座和定位柱，所述底座与背板固定连接，所述定位柱可伸缩地设置于所述底座上并凸出于所述背板朝向膜片的一侧，所述反射片、导光板及膜片依次放置于所述背板上，所述膜片上设有与所述定位柱相适配的定位孔，所述膜片由所述定位孔与所述定位柱配合定位。
上述背光模组中，优选地，所述定位件进一步包括弹性体，所述底座上设有导孔，所述弹性体和所述定位柱依次设于所述导孔内，所述弹性体夹设于所述导孔的底面与所述定位柱之间。
上述背光模组中，优选地，所述弹性体为弹簧。
上述背光模组中，优选地，所述底座包括座体及由所述座体的中部内上延伸的柱体，所述导孔设于所述柱体上。
上述背光模组中，优选地，所述背光模组还包括设于所述膜片上方的胶框，所述定位柱在所述胶框的抵压作用下向内缩进。
上述背光模组中，优选地，所述定位柱的外端在未受所述胶框抵压之前比所述膜片的最外层表面超出2~5毫米。
上述背光模组中，优选地，所述定位柱的外端在受所述胶框抵压之后比所述膜片的最外层表面高出0.5~0.8毫米。
本发明还提供一种膜片定位结构，包括背板及定位件，所述定位件包括底座、定位柱及弹性体，所述底座与背板固定连接，所述定位柱通过所述弹性体可伸缩地设置于所述底座上并凸出于所述背板朝向膜片的一侧。
优选地，所述弹性体为弹簧。
优选地，所述底座包括座体及由所述座体的中部内上延伸的柱体，所述柱体上设有导孔，所述弹性体和所述定位柱依次设于所述导孔内，所述弹性体夹设于所述导孔的底面与所述定位柱之间，所述定位柱的外端凸出所述柱体的外端。
本发明背光模组及其膜片定位结构，通过在底座上设置可伸缩的定位柱来对膜片进行定位，在组装膜片时，定位柱向外伸出以提供更长的长度供膜片定位，可以防止膜片跳脱、移位，有效减少因膜片跳脱、移位所带来的工时浪费及品质异常损伤，提高产能及产品良率，保证背光模组的光学品质。在组装胶框时，定位柱在胶框的抵压作用下向内缩进，从而不会影响胶框的组装。
附图说明
图1为本发明背光模组一较佳实施例的结构示意图，其中未设置胶框。
图2为图1所示背光模组中膜片定位结构的结构示意图。
图3为图1所示背光模组在设置胶框后的结构示意图。
本发明目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
具体实施方式
应当理解，此处所描述的具体实施方式仅仅用以解释本发明，并不用于限定本发明。
如图1至图3所示，为本发明背光模组的一较佳实施例。
背光模组包括膜片定位结构10、反射片20、导光板30及膜片40。
膜片定位结构10包括背板11及定位件12，定位件12包括底座121、定位柱122及弹性体123。底座121与背板11固定连接，底座121上设有导孔124，弹性体123和定位柱122依次设于导孔124内，弹性体123夹设于导孔124的底面与定位柱122之间。弹性体123选用能够产生弹簧回复力的元件，优选为弹簧。底座121包括座体125及由座体125的中部内上延伸的柱体126，导孔124设于柱体126上。定位柱122通过弹性体123可伸缩地设置于底座121上的导孔124内，并凸出于背板11朝向膜片40的一侧。
反射片20、导光板30及膜片40依次放置于背板11上，膜片40上设有与定位柱122相适配的定位孔41，膜片40由定位孔41与定位柱122配合定位。
如图3所示，背光模组还包括设于膜片40上方的胶框50，定位柱122在胶框50的抵压作用下向内缩进。如图2所示，优先地，定位柱122外端在未受胶框50抵压之前比膜片40的最外层表面超出2~5毫米。在组装胶框50后，定位柱122在胶框50的抵压作用下向内缩进一段距离，使得定位柱122仅比膜片高出0.5~0.8毫米，从而符合胶框50的安装要求。
上述背光模组及其膜片定位结构，通过在底座上设置可伸缩的定位柱来对膜片进行定位，在组装膜片时，定位柱向外伸出以提供更长的长度供膜片定位，可以防止膜片跳脱、移位，有效减少因膜片跳脱、移位所带来的工时浪费及品质异常损伤，提高产能及产品良率，保证背光模组的光学品质。在组装胶框时，定位柱在胶框的抵压作用下向内缩进，从而不会影响胶框的组装。
本发明并不局限于以上实施方式，在上述实施方式公开的技术内容下，还可以进行各种变化。凡是利用本发明说明书及附图内容所作的等效结构变换，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 (14)

  1. 一种膜片定位结构，其特征在于，包括背板及定位件，所述定位件包括底座和定位柱，所述底座与背板固定连接，所述定位柱可伸缩地设置于所述底座上并凸出于所述背板朝向膜片的一侧。
  2. 如权利要求1所述的膜片定位结构，其中，所述定位件进一步包括弹性体，所述底座上设有导孔，所述弹性体和所述定位柱依次设于所述导孔内，所述弹性体夹设于所述导孔的底面与所述定位柱之间。
  3. 如权利要求2所述的膜片定位结构，其中，所述弹性体为弹簧。
  4. 如权利要求2所述的膜片定位结构，其中，所述底座包括座体及由所述座体的中部内上延伸的柱体，所述导孔设于所述柱体上。
  5. 一种背光模组，包括膜片定位结构、反射片、导光板及膜片，其中，所述膜片定位结构包括背板及定位件，所述定位件包括底座和定位柱，所述底座与背板固定连接，所述定位柱可伸缩地设置于所述底座上并凸出于所述背板朝向膜片的一侧，所述反射片、导光板及膜片依次放置于所述背板上，所述膜片上设有与所述定位柱相适配的定位孔，所述膜片由所述定位孔与所述定位柱配合定位。
  6. 如权利要求5所述的背光模组，其中，所述定位件进一步包括弹性体，所述底座上设有导孔，所述弹性体和所述定位柱依次设于所述导孔内，所述弹性体夹设于所述导孔的底面与所述定位柱之间。
  7. 如权利要求6所述的背光模组，其中，所述弹性体为弹簧。
  8. 如权利要求6所述的背光模组，其中，所述底座包括座体及由所述座体的中部内上延伸的柱体，所述导孔设于所述柱体上。
  9. 如权利要求6所述的背光模组，其中，所述背光模组还包括设于所述膜片上方的胶框，所述定位柱在所述胶框的抵压作用下向内缩进。
  10. 如权利要求9所述的背光模组，其中，所述定位柱的外端在未受所述胶框抵压之前比所述膜片的最外层表面超出2~5毫米。
  11. 如权利要求10所述的背光模组，其中，所述定位柱的外端在受所述胶框抵压之后比所述膜片的最外层表面高出0.5~0.8毫米。
  12. 一种膜片定位结构，其中，包括背板及定位件，所述定位件包括底座、定位柱及弹性体，所述底座与背板固定连接，所述定位柱通过所述弹性体可伸缩地设置于所述底座上并凸出于所述背板朝向膜片的一侧。
  13. 如权利要求12所述的膜片定位结构，其中，所述弹性体为弹簧。
  14. 如权利要求13所述的膜片定位结构，其中，所述底座包括座体及由所述座体的中部内上延伸的柱体，所述柱体上设有导孔，所述弹性体和所述定位柱依次设于所述导孔内，所述弹性体夹设于所述导孔的底面与所述定位柱之间，所述定位柱的外端凸出所述柱体的外端。
PCT/CN2013/078055 2013-04-25 2013-06-26 背光模组及其膜片定位结构 Ceased WO2014172993A1 (zh)

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