CN104678630A - 侧入式背光模组 - Google Patents

侧入式背光模组 Download PDF

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CN104678630A
CN104678630A CN201310615328.XA CN201310615328A CN104678630A CN 104678630 A CN104678630 A CN 104678630A CN 201310615328 A CN201310615328 A CN 201310615328A CN 104678630 A CN104678630 A CN 104678630A
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bonnet
side entrance
back module
entrance back
guide plate
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章绍汉
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Fu Tai Hua Precision Electronic Zhengzhou Co Ltd
Hon Hai Precision Industry Co Ltd
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Fu Tai Hua Precision Electronic Zhengzhou Co Ltd
Hon Hai Precision Industry Co Ltd
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Priority to CN201310615328.XA priority Critical patent/CN104678630A/zh
Priority to TW102144534A priority patent/TW201520657A/zh
Priority to US14/509,401 priority patent/US20150146136A1/en
Publication of CN104678630A publication Critical patent/CN104678630A/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
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    • 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
    • G02B6/0033—Means for improving the coupling-out of light from 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
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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
    • 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
    • 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
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    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133314—Back 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
    • 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
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    • 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
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    • G02—OPTICS
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    • 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
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Abstract

一种侧入式背光模组，包括：前框、光学膜片组、导光板、后盖及光源基板。光学膜片组位于导光板的上方，后盖连接于前框的下方，后盖呈盒状结构，导光板收容在后盖内并用埋入成型的工艺与后盖一体成型。后盖包括底面和垂直连接于底面的多个侧壁，底板和侧壁具有高反射率，底面上设置有多个微盲孔。本发明通过在后盖的底面上设置多个微盲孔，使侧入式背光模组出光更加均匀，并利用导光板与金属后盖一体成型，降低了组装难度，进而提高了生产效率。

Description

侧入式背光模组
技术领域
本发明涉及一种背光模组，特别涉及一种侧入式背光模组。
背景技术
随着液晶显示产业的快速发展，各种液晶显示面板的产品应用持续增加。但是由于液晶显示装置的液晶面板不能发光，需要由背光模组来提供光源，以实现液晶面板的图像显示。同时，由于更轻更薄的液晶显示面板的产品不断推陈出新，需要对背光模组进行不断的改进，以降低其生产成本并进一步提高背光模组出光的均匀性。
一种背光模组，包括背板、设置于背板上的反射片、设置于所述背板上的胶框、依次设置于所述反射片上的导光板和光学膜片组。其中所述胶框和反射片通过双面胶带固定。现有技术所述背光模组胶框、反射片以及导光板为分别注塑、制作成型后，进行组装固定。这样导光板与胶框之间存在组装间隙，组装间隙之间存在多余的光源，会导致显示区域有亮线风险。而且，成型后的胶框极易变形，胶框与导光板之间组装困难，因此影响背光模组整体的组装效率，进而降低了生产效率。另外，随着对背光模组的要求变的越来越薄，就会促使人们直接减少了导光板的厚度来达到目的，随着导光板逐渐变薄，就有可能导致背光模组出光不均匀的后果。
发明内容
鉴于上述状况，有必要提供一种组装简单且出光均匀的侧入式背光模组。
一种侧入式背光模组，包括：前框、光学膜片组、导光板、后盖及光源基板。光学膜片组位于导光板的上方，后盖连接于前框的下方，后盖呈盒状结构，导光板收容在后盖内并用埋入成型的工艺与后盖一体成型。后盖包括底面和垂直连接于底面的多个侧壁，底板和侧壁具有高反射率，底面上设置有多个微盲孔。
上述侧入式背光模组通过将导光板用埋入成型的工艺与金属后盖一体成型，降低了侧入式背光模组组装的难度，提高了生产效率。并且在后盖的底面上设置多个微盲孔，可以形成光散射的网点，实现了侧入式背光模组出光均匀性的效果。另外，金属材质的后盖既可以屏蔽电磁干扰，还可以传导LED灯发光状态时产生的热量，提高LED灯的发光效率。
附图说明
图1是本发明实施例的侧入式背光模组的立体分解图。
图2是图1中所示的侧入式背光模组的局部剖视图。
图3是图1中所示的后盖的立体示意图。
图4是本发明实施例的侧入式背光模组的光路图。
主要元件符号说明
侧入式背光模组 100
前框 10
液晶面板收纳部 11
外沿槽 12
内沿槽 13
光学膜片组 20
扩散片 21
棱镜片 22
棱镜片 23
扩散片 24
导光板 30
出光面 31
后盖 40
底面 41
微盲孔 411
侧壁 42
侧壁上沿 421
光源基板 50
LED灯 51
如下具体实施方式将结合上述附图进一步说明本发明。
具体实施方式
下面结合附图及实施方式对本发明提供的侧入式背光模组作进一步详细说明。
请参照图1，本发明实施例提供的侧入式背光模组100，包括前框10、光学膜片组20、导光板30、盒状结构的后盖40及光源基板50。其中，光学膜片组20位于导光板30的上方，光学膜片组20收容在前框10内，导光板30收容在盒状结构的后盖40内，后盖40连接于前框10的下方，光源基板50位于后盖40的一侧并紧邻导光板30的一个侧面。
请同时参照图2，前框10为塑胶材料制成，呈中空的矩形框架结构。前框10包括一个阶梯状的液晶面板收纳部11，位于远离后盖40的一端，用于收纳液晶面板（图未示）。可以理解的是，液晶面板收纳部11也可为其他形状，只要其便于收容液晶面板即可。
前框10接近后盖40的一端，沿其外边缘的一周开设有外沿槽12，该外沿槽12与后盖40连接。沿与前框10外边缘对应的内边缘一周开设有内沿槽13，该内沿槽13与光学膜片组20连接，并用于固定光学膜片组20。
光学膜片组20包括多个光学片。优选地，多个光学片为扩散片21、棱镜片22、棱镜片23和扩散片24依序叠放的四片式组合。
导光板30为透明塑胶材料制成，呈矩形板状结构，完全收纳在后盖40中。该导光板30接近光学膜片组20的一面设置为出光面31，当入射在出光面31上的光线小于出光面31的全反射的临界角时，可以形成出射光线。反之，出光面31将大于全反射的临界角的入射光线以全反射的形式重新反射到导光板30内。另外，光学膜片组20位于出光面31的上方，出光面31支撑光学膜片组20。
请同时参照图2和图3，后盖40为金属薄板材料制成，包括一底面41和与底面41垂直连接的多个侧壁42。侧壁42远离底面41的一端为侧壁上沿421，该侧壁上沿421的尺寸与上述前框10的外沿槽12的尺寸相适应，且侧壁上沿421卡持在前框10的外沿槽12内，将后盖40与前框10固定连接。底面41与多个侧壁42的内表面均具有高反射率的特性。优选地，可以在底面41与多个侧壁42的内表面设置一层高反射率的反射层。
后盖40的底面41上设置有多个微盲孔411，微盲孔411呈圆形凹槽结构，微盲孔411的表面具有高反射率的反射层。多个微盲孔411呈阵列状均匀排布在底面41上，可作为导光板30的光散射网点，从而提高了出光面31出光的均匀性。
可以理解，微盲孔411也可以为矩形凹槽或其他形状的凹槽，只要光线照射在微盲孔411上能够达到散射的目的即可。微盲孔411不限于均匀分布在底面41上，其分布密度可以随着与光源基板50的距离增加而增加。
上述具有高反射率的反射层可以为具有高反射率的银膜镀层，也可以为高反射率的油墨涂层。但并不限于此，只要反射层具有高反射率的特性即可。
由于后盖40本身为金属材料，可以有效的屏蔽电磁干扰。上述金属材料的后盖40代替了传统背光模组为了解决电磁干扰的问题而增设的金属板，从而实现了传统背光模组的轻量化和薄型化。另外，金属材料还具有热传导的特性，故金属后盖40可以有效导出侧入式背光模组100内发热元件发出的热量。
在本实施例中，导光板30采用埋入成型的工艺与后盖40一体成型，不仅能够提高侧入式背光模组100的结构强度、提高显示效果，还能够将现有人工组装背光模组的过程变成机械化的埋入成型工艺，降低了组装的难度，从而提高了侧入式背光模组100的生产效率。
光源基板50为矩形板状结构，并贴附在后盖40的至少一个侧壁42上。该光源基板50上设有多个LED灯51，用来提供该侧入式背光模组100的光源。优选地，该多个LED灯51沿光源基板50呈阵列状排布。
多个LED灯51为发热元件，且LED灯51的发光效率会随着温度升高而降低。但是，由于光源基板50贴附在金属后盖40的侧壁42上，从而可以将热量有效的传导出去，提高了LED灯51的发光效率。
组装侧入式背光模组100时，首先，先将导光板30用埋入成型法与后盖40一体成型，再将带有LED灯51的光源基板50固定在后盖40的侧壁42上。然后，将光学膜片组20的扩散片21、棱镜片22、棱镜片23和扩散片24以此顺序由上到下叠放在一起，并将叠放整齐的光学膜片组20放在导光板30的出光面31上。最后，再将前框10放在光学膜片组20的上方，并且后盖的侧壁上沿421卡合在前框10的外沿槽12内。完成本发明侧入式背光模组100的组装过程。
请参照图4，本发明侧入式背光模组100光线的传播路径为：多个LED灯51向周围发出光线，进入导光板30内。其中一部分光线直接由导光板30的出光面31出射，另一部分光线则是照射到后盖具有高反射率的底面41上，经过底面41上多个微盲孔411的散射作用，从而在出光面31形成较均匀的出射光线。该后盖40的底面41和侧壁42均具有全反射作用，LED灯51发出的光线通过多次反射和微盲孔411的散射，从而可以在导光板30的出光面31上形成了较均匀的出射光线。最终在光学膜片组20上形成了均匀的面光源。
本发明通过将导光板30用埋入成型工艺与金属后盖40一体成型，降低了侧入式背光模组100组装的难度，提高了生产效率。在金属后盖40的底面41设有多个微盲孔411，且微盲孔411具有高反射率的表面，多个微盲孔411形成了光散射的网点，从而可以在光学膜片组20上形成更加均匀的面光源。金属后盖40的底面41与侧壁42均具有高反射率，提高了侧入式背光模组100的光线利用率。金属后盖40替代了传统背光模组为了解决电磁干扰的问题而增设的金属板，实现了背光模组的轻量化和薄型化。由于导光板30和后盖40一体成型，后盖的侧壁42和导光板30的出光面31即可替代了传统背光模组设置在导光板与后盖侧壁之间的胶框，实现了背光模组的窄边框化。并且，该侧入式背光模组100的结构简单，组装容易。
由于LED灯51发光状态时会不断产生热量，且本实施例的侧入式背光模组100的后盖40为金属薄板材料，金属材料本身具有很好的热传导性，从而可以将LED灯51产生的热量通过金属材料的后盖40传导出去。所以本实施例的侧入式背光模组100还具有良好的散热效果。
另外，本领域技术人员还可在本发明精神内做其它变化，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 (10)

1.一种侧入式背光模组，包括：前框、光学膜片组、导光板、后盖及光源基板，所述光学膜片组位于导光板的上方，所述后盖连接于所述前框的下方，其特征在于：所述后盖呈盒状结构，所述导光板收容在所述后盖内并用埋入成型的工艺与后盖一体成型，所述后盖包括底面和垂直连接于底面的多个侧壁，所述底板和所述侧壁具有高反射率，所述底面上设置有多个微盲孔。
2.如权利要求1所述的侧入式背光模组，其特征在于：所述微盲孔为圆形凹槽结构且呈阵列状分布在后盖的底面上，所述后盖的底面、侧壁及所述微盲孔的内表面均具有高反射率的反射层。
3.如权利要求1所述的侧入式背光模组，其特征在于：所述后盖由金属薄板材料制成。
4.如权利要求1所述的侧入式背光模组，其特征在于：所述导光板远离后盖的一面为出光面，该出光面支撑所述光学膜片组。
5.如权利要求1所述的侧入式背光模组，其特征在于：所述微盲孔的分布密度随着其与光源基板的距离增加而增加。
6.如权利要求1所述的侧入式背光模组，其特征在于：所述前框接近后盖的一端开设有外沿槽和内沿槽，所述外沿槽与后盖的侧壁连接，所述内沿槽与光学膜片组的侧边连接。
7.如权利要求1所述的侧入式背光模组，其特征在于：所述前框远离后盖的一端还设有阶梯状的液晶面板收纳部。
8.如权利要求1所述的侧入式背光模组，其特征在于：所述光源基板位于后盖的至少一个侧壁上。
9.如权利要求8所述的侧入式背光模组，其特征在于：所述光源基板上设置有多个LED灯。
10.如权利要求1所述的侧入式背光模组，其特征在于：所述光学膜片组包括层叠设置的扩散片、棱镜片、棱镜片和扩散片。
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