CN101000433A - 背光模组 - Google Patents
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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
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
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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
- G02B6/0091—Positioning aspects of the light source relative to the light guide
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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
- G02B6/0066—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 characterised by the light source being coupled to the light guide
- G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
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- G—PHYSICS
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- 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
- G02B6/0083—Details of electrical connections of light sources to drivers, circuit boards, or the like
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- 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
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Abstract
本发明涉及一种背光模组,该背光模组包括:一导光板,其具有一入光面;一可容纳并固持该导光板的框架;一软性电路板及多个电连接于该软性电路板表面的点光源,该框架靠近该入光面的侧壁设有与该点光源相对应的弹性元件,该弹性元件分别抵压相应点光源,使该点光源的发光面与该导光板的入光面相接触。本发明的背光模组由于该多个点光源的发光面紧贴该导光板的入光面,所以具有较高的光能利用率。
Description
【技术领域】
本发明涉及一种应用于液晶显示装置的背光模组,尤其涉及一种侧光式背光模组。
【背景技术】
由于液晶显示器面板的液晶本身不具发光特性,因而,为达到显示效果,需给液晶显示器面板提供一面光源装置,如背光模组,其作用在于向液晶显示器面板供应亮度充分并且分布均匀的面光源。
请参阅图1,现有技术揭示一种应用于小尺寸面板的背光模组10。该背光模组10包括一导光板12、一框架14、多个发光二极管16(Light Emitting Diode,LED)(下称LED),以及一软性电路板18(Flexible Printed Circuit,FPC)(下称FPC)。该框架14容纳并固定该导光板12。该框架14靠近该导光板12的入光面122的侧壁设有多个凹槽142,用于相应容纳该多个LED16。
请同时参阅图2,该多个LED16分别焊接于该FPC18的一表面。在同一表面,邻近该多个LED16的一侧粘上一长条形状的双面胶182,用于将该FPC18粘附在该导光板12的与入光面122相连的底面上,从而将该多个LED16分别限定于凹槽142内并固定该FPC18于该导光板12。
但是,由于该FPC18较柔软,而且该LED16体积较小,以至无法保证该多个LED16精确焊接于该FPC18,而较易出现位置偏斜,不能保证该多个LED16的发光面162处于与入光面122平行的同一平面。从而造成组装时,该多个LED16的发光面162无法同时贴紧该导光板12的入光面122。而且在将该FPC18固定于该导光板12过程中,操作员需要将该LED16的发光面162尽量贴近该导光板12的入光面122以防止该多个LED16与入光面122有较大空隙,而此过程较不易控制。由此,该背光模组10的一部分光能仍经由空隙损失而不能为导光板12所接收,造成光能利用率较低。
请参阅图3,现有技术揭示另一种背光模组30。该背光模组30与前述背光模组10相似,其不同在于该框架34用于限定LED36的凹槽342底部设有定位凸块344,用于限定多个LED光源,并使其与导光板32的入光面322相靠近。但是由于该框架34、导光板32和焊接有LED36的FPC38的制备过程中会产生累积公差,实际上LED36在导光板32的入光面322与定位凸块344之间仍有一定空隙,因此,该背光模组30的光能利用率也较低。
有鉴于此,提供一种通过保证发光二极管发光面与导光板入光面紧密接触以提高光能利用率的背光模组实为必要。
【发明内容】
下面将以实施例说明一种通过保证发光二极管发光面与导光板入光面紧密接触以提高光能利用率的背光模组。
一种背光模组,其包括:一导光板,其具有一入光面;一可容纳并固持该导光板的框架;一软性电路板及多个电连接于该软性电路板表面的点光源,该框架靠近该入光面的侧壁设有与该点光源相对应的弹性元件,该弹性元件分别抵压相应点光源,使该点光源的发光面与该导光板的入光面相接触。
与现有技术相比较,该背光模组的框架凹槽设置有弹性元件,该弹性元件可对相应的点光源施加朝向该导光板入光面的弹性力,使该点光源的发光面紧贴该导光板的入光面,从而提高背光模组的光能利用率。
【附图说明】
图1是一种现有背光模组的俯视图。
图2是图1所示背光模组的FPC及LED的结构示意图。
图3是另一种现有背光模组的俯视图。
图4是本发明背光模组较佳实施例一的俯视图。
图5是图4所示背光模组的FPC及LED的结构示意图。
图6是本发明背光模组较佳实施例二的俯视图。
图7是本发明背光模组较佳实施例三的俯视图。
图8是本发明背光模组较佳实施例四的俯视图。
【具体实施方式】
请参考本发明背光模组的较佳实施例一。
如图4和图5所示,该背光模组40包括一导光板42,一框架44,多个LED46和一FPC48。该导光板42包括一入光面422,一与该入光面422相连的出光面424以及一与该出光面424相对的底面(图未示)。该框架44包括四侧壁441,用于容纳并固持该导光板42,其中靠近该入光面422的侧壁441的内侧开设有朝向该入光面422的多个凹槽442。该凹槽442设有一弹性元件446。本实施中,该弹性元件446为从该凹槽442底部一侧延伸并相交于底部另一侧的弹性壁。该弹性壁可对该LED46施加朝向入光面422方向的弹性力。
该FPC48近似为一长条形状,其引线端穿过该框架侧壁441。该多个LED46等间隔焊接于该FPC48一侧表面,且相邻LED46之间的距离与该相邻凹槽442之间的距离大致相等。该LED46的发光面462与该FPC48的长度方向相平行。相邻LED46之间的FPC48分别开设有两相对的缺口484。在焊接该多个LED46的同一表面,邻近该多个LED16的另一侧,该FPC48粘上一长度与该导光板42的入光面422相同的条状双面胶482,可用于将部分FPC48粘附在该导光板42底面。
该背光模组40进行组装时,先将该导光板42装配于该框架44,接着将该焊接好LED46的FPC48通过双面胶482粘附于该导光板42靠近入光面422的底面,并使该LED46的发光面462靠近该入光面422,然后,将该多个LED46分别嵌入相应的框架44的凹槽442。在该凹槽442内的弹性元件446朝向入光面422方向的弹性力作用下,该多个LED46及FPC48可进行微调,使该多个LED46的发光面462与入光面422相接触。而且,本实施中,由于相邻LED46之间的FPC48分别开设有两相对的缺口484,所以当部分FPC48及与其连接的单个LED46进行上下位置调整时,可尽量不影响其他LED46的位置发生偏移,从而减少以下情况发生:如LED46焊接定位不正,组装时该多个LED46因弹性元件446被强行定位后可能造成该FPC48出现较大的褶皱。
请进一步参考本发明背光模组的较佳实施例二。
如图6所示,该背光模组60与本发明较佳实施例一的背光模组40相似,其不同在于该背光模组60的框架64的多个凹槽642的弹性元件646与弹性元件446不同。该弹性元件646包括两弹性壁,其分别从该凹槽642底部两侧向凹槽642中心方向延伸。模组组装时,该弹性元件646抵压相应LED66,使该LED66受到朝向导光板62的入光面622方向的弹性力。
请进一步参考本发明背光模组的较佳实施例三。
如图7所示,该背光模组70与本发明较佳实施例一的背光模组40相似,其不同在于该背光模组70的框架74的多个凹槽742的弹性元件746与弹性元件446不同。该弹性元件746为设于该凹槽742底部的弹性体,其由弹性材料制成。模组组装时,该弹性元件746抵压相应LED76,使该LED76受到朝向该导光板72的入光面722方向的弹性力。
请进一步参考本发明背光模组的较佳实施例四。
如图8所示,该背光模组80与本发明较佳实施例三的背光模组70相似,其不同在于该背光模组80的多个凹槽842的弹性元件846与弹性元件746不同。该弹性元件846为设于该凹槽842底部的多个间隔排列的弹性体,其同样能起到对相应LED86施加朝向导光板82的入光面822方向的弹性力作用。本实施的弹性元件846为设于该凹槽842底部的两个间隔排列的弹性体。
可以理解,本发明在保证LED精确焊接定位的情况下,本发明可采用不具有缺口结构的FPC。
可以理解,本发明设置于框架凹槽的弹性元件除了设置弹性壁或弹性体外,还可选用其它具有定向弹性力的弹性结构,如弹簧等,或该上述几种弹性结构的组合。本发明以可采用其它点光源取代LED点光源。
可以理解,本发明的背光模组的导光板可采用平板型或楔型,该导光板可由聚碳酸酯(PC)、聚甲基丙烯酸甲酯(PMMA)等合成树脂材料制成。
另外,需要强调的是,本发明的弹性元件可直接设于该框架靠近该导光板入光面的侧壁表面,而无需将该侧壁开设凹槽,此设计同样能达到本发明的技术效果。
本发明的背光模组的框架凹槽设置有弹性元件,该弹性元件可对相应的点光源施加朝向该导光板入光面的弹性力,使该点光源的发光面紧贴该导光板的入光面,从而提高背光模组的光能利用率。进一步的,相邻点光源之间的FPC开设有两相对的缺口,所以当部分FPC及与其连接的点光源进行上下位置调整时,可尽量不影响其他点光源的位置发生偏移,从而避免当点光源焊接定位不正,组装时该多个点光源因弹性元件被强行定位后可能造成该FPC出现较大的褶皱。
另外,本领域技术人员还可以在本发明精神内做其他变化,当然,这些依据本发明精神所做的变化,都应包含在本发明所要求保护的范围内。
Claims (11)
1.一种背光模组,其包括:
一导光板,其具有一入光面;
一可容纳并固持该导光板的框架;
一软性电路板及多个电连接于该软性电路板表面的点光源,其特征在于该框架靠近该入光面的侧壁设有与该点光源相对应的弹性元件,该弹性元件分别抵压相应点光源,使该点光源的发光面与该导光板的入光面相接触。
2.如权利要求1所述的背光模组,其特征在于该框架靠近该入光面的侧壁还包括多个凹槽,且该多个弹性元件分别设于该多个凹槽内。
3.如权利要求2所述的背光模组,其特征在于该弹性元件为一从该凹槽底部一侧延伸并相交于底部另一侧的弹性壁。
4.如权利要求2所述的背光模组,其特征在于该弹性元件为至少一弹性壁,其从该凹槽底部向该凹槽中心延伸。
5.如权利要求2所述的背光模组,其特征在于该弹性元件为至少一设置于该凹槽底部的弹性体。
6.如权利要求2所述的背光模组,其特征在于该弹性元件为设置于该凹槽底部的弹簧。
7.如权利要求1所述的背光模组,其特征在于相邻点光源之间的软性电路板开设有两相对的缺口。
8.如权利要求1所述的背光模组,其特征在于该软性电路板通过双面胶粘附于该导光板靠近入光面一侧的底面。
9.如权利要求1所述的背光模组,其特征在于该点光源为发光二极管。
10.如权利要求1所述的背光模组,其特征在于该导光板包括平板型或楔型。
11.如权利要求1所述的背光模组,其特征在于该导光板由聚碳酸酯、聚甲基丙烯酸甲酯制成。
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Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
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US7978280B2 (en) | 2007-08-28 | 2011-07-12 | Au Optronics Corporation | Backlight module and liquid crystal display incorporating same |
CN101452148B (zh) * | 2007-12-05 | 2011-12-21 | 奇美电子股份有限公司 | 背光模组及液晶显示器 |
CN102980146A (zh) * | 2011-09-07 | 2013-03-20 | 鸿富锦精密工业(深圳)有限公司 | 背光模组外框、背光模组及液晶面板 |
CN103244868A (zh) * | 2012-02-08 | 2013-08-14 | 扬升照明股份有限公司 | 背光模组 |
CN108287389A (zh) * | 2018-02-24 | 2018-07-17 | 京东方科技集团股份有限公司 | 背光模组及显示装置 |
CN108431670A (zh) * | 2015-11-13 | 2018-08-21 | 瑞尔D斯帕克有限责任公司 | 用于成像定向背光源的表面特征结构 |
WO2021017311A1 (zh) * | 2019-07-29 | 2021-02-04 | 武汉华星光电技术有限公司 | 背光模组和显示模组 |
WO2024040725A1 (zh) * | 2022-08-22 | 2024-02-29 | 瑞仪(广州)光电子器件有限公司 | 背光模组及显示装置 |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
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KR100820516B1 (ko) * | 2006-12-22 | 2008-04-07 | 엘지이노텍 주식회사 | 라이트 유닛 및 이를 갖는 액정 표시 장치 |
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JP3875891B2 (ja) * | 2002-01-24 | 2007-01-31 | 株式会社日立製作所 | 液晶表示装置 |
US6726502B1 (en) * | 2003-03-21 | 2004-04-27 | Fci Americas Technology Inc. | LED and flex cable lighting assembly |
JP4489423B2 (ja) * | 2003-12-26 | 2010-06-23 | シャープ株式会社 | バックライト及び液晶表示装置 |
TWM270369U (en) * | 2004-11-26 | 2005-07-11 | Innolux Display Corp | Back light module and liquid crystal display device |
TWM269470U (en) * | 2004-12-31 | 2005-07-01 | Innolux Display Corp | Back light module |
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- 2006-01-12 CN CNA2006100328990A patent/CN101000433A/zh active Pending
- 2006-10-02 US US11/541,925 patent/US20070159853A1/en not_active Abandoned
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CN102980146B (zh) * | 2011-09-07 | 2016-09-28 | 鸿富锦精密工业(深圳)有限公司 | 背光模组外框、背光模组及液晶面板 |
CN103244868A (zh) * | 2012-02-08 | 2013-08-14 | 扬升照明股份有限公司 | 背光模组 |
CN108431670A (zh) * | 2015-11-13 | 2018-08-21 | 瑞尔D斯帕克有限责任公司 | 用于成像定向背光源的表面特征结构 |
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CN108287389A (zh) * | 2018-02-24 | 2018-07-17 | 京东方科技集团股份有限公司 | 背光模组及显示装置 |
WO2021017311A1 (zh) * | 2019-07-29 | 2021-02-04 | 武汉华星光电技术有限公司 | 背光模组和显示模组 |
WO2024040725A1 (zh) * | 2022-08-22 | 2024-02-29 | 瑞仪(广州)光电子器件有限公司 | 背光模组及显示装置 |
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