CN201779478U - 背光模组 - Google Patents

背光模组 Download PDF

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Publication number
CN201779478U
CN201779478U CN2010202433620U CN201020243362U CN201779478U CN 201779478 U CN201779478 U CN 201779478U CN 2010202433620 U CN2010202433620 U CN 2010202433620U CN 201020243362 U CN201020243362 U CN 201020243362U CN 201779478 U CN201779478 U CN 201779478U
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China
Prior art keywords
lgp
light
plate
guide plate
light guide
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Expired - Fee Related
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CN2010202433620U
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English (en)
Inventor
何金民
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Shenzhen Futaihong Precision Industry Co Ltd
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Shenzhen Futaihong Precision Industry Co Ltd
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Priority to CN2010202433620U priority Critical patent/CN201779478U/zh
Priority to US12/908,975 priority patent/US20120002439A1/en
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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
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0051—Diffusing sheet or layer
    • 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
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
    • G02B6/0043—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided on the surface of the light guide
    • 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
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0053—Prismatic sheet or layer; Brightness enhancement element, sheet or layer

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)
  • Liquid Crystal (AREA)

Abstract

本实用新型公开一种背光模组，其包括导光板、扩散板、第一增光板、第二增光板及光源，该导光板包括第一导光板及第二导光板，该第一导光板一表面涂有反射层，该第二导光板设有光学网点，该光学网点位于该第一导光板与该第二导光板之间，该光源发射的光线分别射入该第一导光板及第二导光板，并通过该反射层将光学网点漏出的光线反射回第二导光板内部。

Description

背光模组
技术领域
本实用新型涉及一种背光模组。
背景技术
目前，在电子产品，如手机的显示屏一般采用发光二极管(light-emitting diode，LED)作为灯源，将该LED置于手机背光模组内，光源通过导光板及反光板转换成均远光面使显示屏发光，但是，导光板的底面或周缘会有漏光现象，漏掉的光线不能被反射回加以利用，会造成光源浪费，并使显示屏亮度相对地降低。
实用新型内容
有鉴于此，有必要提供一种具有较高光源利用率的背光模组。
一种背光模组，其包括导光板、扩散板、第一增光板、第二增光板及光源，该导光板包括第一导光板及第二导光板，该第一导光板一表面涂有反射层，该第二导光板设有光学网点，该光学网点位于该第一导光板与该第二导光板之间，该光源发射的光线分别射入该第一导光板及第二导光板，并通过该反射层将光学网点漏出的光线反射回第二导光板内部。
优选地，该反射层涂料为铝。
优选地，该反射层涂料为银。
优选地，该第二导光板设有一底面，该光学网点设于该底面上。
优选地，该光学网点通过网点印刷形成。
优选地，该光学网点通过精密刀具切削形成。
优选地，该第一导光板及第二导光板为亚克力材质制成。
相较现有的背光模组，所述第二导光板的一部分光线透过光学网点射到第一导光板内，通过反射层重新反射回第二导光板，省略了反射板，高效率地利用了光源，并提高了背光模组的均匀度。
附图说明
图1是本实用新型较佳实施例的背光模组的平面示意图。
主要元件符号说明
  第一导光板   10
  反射层   12
  第二导光板   20
  底面   21
  光学网点   22
  扩散板   30
  第一增光板   40
  第二增光板   50
  光源   60
具体实施方式
请参阅图1，本实用新型的背光模组包括导光板(图未标)、扩散板30、第一增光板40、第二增光板50及光源60。该导光板包括第一导光板10、第二导光板20。该第一导光板10、第二导光板20、扩散板30、第一增光板40、第二增光板50由下到上平行排列。该光源60为点光源，例如LED，可以理解，该光源60也可以为线光源，例如冷阴极荧光灯。光源60发出的光线通过第一导光板10及第二导光板20反射进入扩散板30，通过扩散板30扩散后射入第一增光板40及第二增光板50。
该第一导光板10采用亚克力材料制成，其一表面涂布有高反射率的反射层12。该反射层12涂料为铝、银等反射材料
所述导光板20采用亚克力材料制成，其设有一底面21。该底面21与该第一导光板10另一表面相对。该光学网点22通过网点印刷或者精密刀具切削形成。本实施例中，该底面21采用网点印刷形成光学网点22。该光学网点22将可将点光源60或线光源60的光均匀化，转换成均匀的光面。从该底面21漏出的光线射入第一导光板10，第一导光板10的反射层12将漏出的光线反射回第一导光板10及第二导光板20内，同时将光线均匀化。
所述光源60设置于该第一导光板10及第二导光板20的未涂设有反射层的侧部。
可以理解，该第一导光板10及第二导光板20周侧面上除去点光源60(线光源)入光位置均涂有反射材料，形成一涂层(图未标)，用于将第一导光板10及第二导光板20侧面漏出的光线反射回并重新利用。
所述背光模组的光源60光线从第一导光板10及第二导光板20侧部射入，一部分光线通过光学网点22转换成均匀面光源，并将光线反射到散光板40；还有一部分光线透过光学网点射到第一导光板10内，通过反射层12重新反射回第二导光板20再反射到散光板40上，省略了反射板，高效率地利用了光源，并提高了背光模组的发光度及均匀度。

Claims (7)

1.一种背光模组，其包括导光板、扩散板、第一增光板、第二增光板及光源，其特征在于：该导光板包括第一导光板及第二导光板，该第一导光板表面涂有反射层，该第二导光板设有光学网点，该光学网点位于该第一导光板与该第二导光板之间，该光源发射的光线分别射入该第一导光板及第二导光板，并通过该反射层将光学网点漏出的光线反射回第二导光板内部。
2.如权利要求1所述的背光模组，其特征在于：该反射层涂料为铝。
3.如权利要求1述的背光模组，其特征在于：该反射层涂料为银。
4.如权利要求1述的背光模组，其特征在于：该第二导光板设有一底面，该光学网点设于该底面上。
5.如权利要求4述的背光模组，其特征在于：该光学网点通过网点印刷形成。
6.如权利要求4述的背光模组，其特征在于：该光学网点通过精密刀具切削形成。
7.如权利要求1述的背光模组，其特征在于：该第一导光板及第二导光板为亚克力材质制成。
CN2010202433620U 2010-06-30 2010-06-30 背光模组 Expired - Fee Related CN201779478U (zh)

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CN2010202433620U CN201779478U (zh) 2010-06-30 2010-06-30 背光模组
US12/908,975 US20120002439A1 (en) 2010-06-30 2010-10-21 Backlight module

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CN2010202433620U CN201779478U (zh) 2010-06-30 2010-06-30 背光模组

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TW201239423A (en) * 2011-03-28 2012-10-01 Chimei Innolux Corp Light guide assembly and touch panel
WO2017065745A1 (en) * 2015-10-13 2017-04-20 Hewlett-Packard Development Company, L.P. Privacy backlight module
CN113587048A (zh) * 2021-07-30 2021-11-02 上海泉福化工新材料科技有限公司 一种聚碳酸酯棱镜板及其生产方法

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US5479328A (en) * 1994-01-05 1995-12-26 Interstate Electronics Corporation High-brightness, high-efficacy backlight
JP3906956B2 (ja) * 1998-12-24 2007-04-18 株式会社 日立ディスプレイズ 液晶表示装置
JP3828402B2 (ja) * 2001-11-08 2006-10-04 株式会社日立製作所 背面照明装置およびこれを用いた液晶表示装置並びに液晶表示装置の照明方法
TWI300500B (en) * 2003-06-03 2008-09-01 Au Optronics Corp Liquid crystal display
US7556391B2 (en) * 2004-09-06 2009-07-07 Fujifilm Corporation Transmittance adjuster unit, a planar illumination device, a liquid crystal display device using the same, and a method of arranging transmittance adjusters
JP4600218B2 (ja) * 2005-08-29 2010-12-15 カシオ計算機株式会社 面光源及び液晶表示装置

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