CN2594812Y - Light conducting panel and surface light source devices - Google Patents

Light conducting panel and surface light source devices Download PDF

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Publication number
CN2594812Y
CN2594812Y CN 02250620 CN02250620U CN2594812Y CN 2594812 Y CN2594812 Y CN 2594812Y CN 02250620 CN02250620 CN 02250620 CN 02250620 U CN02250620 U CN 02250620U CN 2594812 Y CN2594812 Y CN 2594812Y
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China
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light
surface
guide plate
light source
light guide
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CN 02250620
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Chinese (zh)
Inventor
吕昌岳
陈杰良
林明辉
刘铭萱
余泰成
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鸿富锦精密工业(深圳)有限公司
鸿海精密工业股份有限公司
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Priority to CN 02250620 priority Critical patent/CN2594812Y/en
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Publication of CN2594812Y publication Critical patent/CN2594812Y/en

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Abstract

The utility model relates to a light conducting plate and a surface light source device which uses the light conducting plate. The light conducting plate comprises a light incident surface, a light outgoing surface and a light reflection surface which is opposite to the light outgoing surface, wherein, the light reflection surface is provided with a plurality of scattering netted points; optical scattering particles of which reflection surfaces are spherical are added in screen printing ink when the scattering netted points of the light conducting plate are printed by screen; consequently, the fine structure of the scattering netted points is changed so that the scattering power of each scattering netted point is enhanced.

Description

导光板及面光源装置 The light guide plate and surface light source device

【技术领域】本实用新型是关于一种导光板及面光源装置,尤指一种用于液晶显示装置的具有较强散射能力的导光板及采用该导光板的面光源装置。 TECHNICAL FIELD The present invention relates to a light guide plate and surface light source device, particularly to a light guide plate for a strong scattering power of the liquid crystal display device and surface light source device using the light guide plate.

【背景技术】由于液晶显示面板中的液晶本身没有发光特性,为达到显示效果,必须给液晶显示面板提供一面光源装置,其功能在于向液晶显示面板提供辉度充分且分布均匀的面光源。 BACKGROUND Since the liquid crystal display panel of the liquid crystal itself has no light emission characteristics, to achieve the display, the liquid crystal panel to be displayed to provide a surface light source device, whose function is to provide a surface light source panel sufficiently and uniformly distributed luminance to the liquid crystal.

现有的面光源装置主要由光源、导光板、反射板、扩散板及棱镜板组成。 Conventional surface light source device consists of a light source, a light guide plate, a reflection plate, diffusion plate and a prism plates. 其中,光源可设置于导光板一侧或二相对侧并将光线发射至导光板。 Wherein the light source may be disposed on one side or two opposite sides of the light guide plate and the light emitted to the light guide plate. 导光板的作用在于引导光线的传输方向,以提高面板的辉度及面板辉度的均匀性,是面光源装置中关键的组件。 In that a light guide plate guiding the light transmission direction, in order to improve the panel luminance and luminance uniformity of the panel, the surface light source device is a key component. 导光板的制作一般可分为印刷式和非印刷式。 Making the light guide plate can be divided into general printing and non-printing type. 印刷式的制程为平板基板射出成形后,利用网印(Screen Printing)技术于导光板光反射面印刷油墨以形成点状的散射网点(Dot Pattern),该原理是利用散射网点的散射性质来破坏全反射效应,使光线经散射网点散射后由导光板光出射面均匀射出。 After printing type process for the plate substrate by injection molding, by screen printing (Screen Printing) technology in the light guide plate reflection surface printing ink to form a dot-like scattering dots (Dot Pattern), which is the use of scattering dot scattering properties to destroy the total reflection effect, so that the light scattered by the dots scattered by the light guide plate exit surface uniformly emitted.

图1为现有技术的导光板12,该导光板12包括一光入射面121、一光出射面122及一与光出射面122相对的光反射面123,该光反射面123上分布多个散射网点124。 Figure 1 is a prior art light guide plate 12, the light guide plate 12 includes a light incident surface 121, a light exit surface 122 and a light exit surface 122 opposite to the light reflecting surface 123, 123 on the light reflection surface a plurality of distribution 124 outlets scattered.

图2为图1中II部分的放大图,其中,该散射网点124是将钛白(TiO2)或者沉降性的硫酸钡(BaSO4)等反射率高的颗粒125印制在导光板12的光反射面123上,然后进行硬化(Curing)固定而形成。 FIG 2 is an enlarged view of portion II of FIG. 1, wherein, the network 124 is the scattering titanium dioxide (TiO2) or precipitated barium sulfate (of BaSO4) and the like having high reflectance light-reflecting particles 125 printed on the light guide plate 12 upper surface 123, and then is cured (curing) fixed form. 但是,该散射网点124的微细结构中,因颗粒125提供的反射面有限,其对光线的散射能力不强,进而使得该导光板12的均匀度较差。 However, the fine structure of the scattering dots 124, 125 to provide reflection due to the particle surface is limited, its ability to scatter light is not strong, so that the turn guide plate 12 is poor uniformity.

【实用新型内容】 [SUMMARY

为克服现有技术中导光板出光均匀度较差的缺陷,本实用新型提供一种散射能力较强的导光板,该导光板具有良好的出光均匀度。 To overcome the defects in the prior art light guide plate inferior uniformity, the present invention provides a strong scattering power light guide plate having a good light uniformity.

本实用新型还提供一种采用上述导光板的面光源装置。 The present invention further provides a surface light source device using the light guide plate.

本实用新型提供一导光板,该导光板包括一用于接收光线的光入射面、一用于输出自该光入射面进入该导光板的光线的光出射面及一与该光出射面相对的光反射面。 The present invention provides a light guide plate including a light incident surface for receiving light, an output from a light incident surface of the light entering the light guide plate and the light exit surface and a surface opposite to the light-emitting light reflecting surface. 其中该光反射面设有多个散射网点,该多个散射网点包括多个反射面为球面的光学散射粒子。 Wherein the light reflecting surface is provided with a plurality of scattered dots, the plurality of outlets comprises a plurality of scattering reflective surface is a spherical optical scattering particles.

本实用新型提供的面光源装置包括至少一光源及一导光板,其中该导光板包括至少一用于接收光源发出之光线的光入射面、一用于输出自上述光入射面进入导光板之光线的光出射面及一与该光出射面相对的光反射面。 The surface light source device of the present invention include at least one light source and a light guide plate, wherein the guide plate comprises at least a light incident surface for receiving light emitted of the light source for a light output from the light incident surface of the light guide plate enters the light exit surface and a light exit face opposite to the light reflecting surface. 该至少一光源位于对应光入射面一侧,该光反射面设有多个散射网点,其中,该多个散射网点包括多个反射面为球面的光学散射粒子。 The at least one light source is located corresponding to a light incident surface side, the light reflecting surface is provided with a plurality of scattered dots, wherein the plurality of outlets comprises a plurality of scattering reflective surface is a spherical optical scattering particles.

相较于现有技术,本实用新型具有如下优点:在散射网点中加入反射面为球面的光学散射粒子,使得散射网点的微细结构中形成多个微小的球形反射面,这样从散射网点反射出来的光束比没有加入该光学散射粒子而反射出来的光束均匀度要高,进而使得导光板及采用该导光板的面光源装置的均匀度得到提高。 Compared to the prior art, the present invention has the following advantages: the reflecting surface added to the network in a spherical scattering optical scattering particles, so that the fine structure of the plurality of dot-scattering fine spherical reflecting surface is formed, so that the reflected scattering outlets beam than without scattering particles added to the optical uniformity of the light beam reflected to be high, thereby making the uniformity of the light guide plate and surface light source device using the light guide plate is improved.

【附图说明】图1是现有导光板的剖面图。 BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a conventional light guide plate.

图2是图1所示导光板II部分的放大图。 FIG 2 is an enlarged view of the guide plate portion II shown in Fig.

图3是本实用新型面光源装置的剖面图。 3 is a sectional view of the surface light source device of the invention.

图4是本实用新型导光板的散射网点微细结构对光线作用示意图。 Figure 4 is a fine dot structure scattering the light guide plate of the present invention, a schematic diagram of the light effect.

图5是本实用新型导光板对光线作用示意图。 FIG 5 is a schematic view of the light guide plate of the present invention the influence of light.

【具体实施方式】请参照图3,是本实用新型面光源装置2的剖面图,该面光源装置2包括一光源21、一导光板22、一反射板23及一扩散板24。 DETAILED DESCRIPTION OF THE INVENTION Referring to FIG. 3, is a cross-sectional view of the present invention the surface light source device 2, the surface light source device 2 includes a light source 21, a light guide plate 22, a reflecting plate 23 and a diffusing plate 24. 其中导光板22包括一用于接收来自光源21的光线的光入射面221、一用于输出自光入射面221进入导光板22的光线的光出射面222、一光反射面223及多个散射网点224,其中该多个散射网点224是通过网印技术印制在光反射面223上。 Wherein the light guide plate 22 comprises a means for receiving 222, 223, and a plurality of scattered light rays from the light reflecting surface of the light incident surface 21, 221, for outputting from a light incident surface 221 into the light exit surface of the light guide plate 22 outlets 224, wherein the plurality of outlets 224 is scattered by the screen printing technique printed on the light reflecting surface 223. 该导光板22为楔型,也可为平板型。 This is a wedge-shaped light guide plate 22, may be a flat plate type. 光源21位于导光板22光入射面221一侧,反射板23与扩散板24分别设置于导光板22的光反射面223与光出射面222的一侧。 The light guide plate 22 light source 21 light incident side surface 221, the reflection plate 23 and the diffusion plate 24 are provided on the side of the light reflection surface 223 of the guide plate 22 and the light exit surface 222.

请配合参照图4,是本实用新型导光板22的散射网点224的微细结构对光线作用示意图。 Please refer to FIG. 4 with, scattering light guide plate 22 outlets of the present invention is a schematic diagram of the fine structure 224 of the light effect. 于网印导光板22的散射网点224时,在网印油墨(未标示)中加入光学散射粒子225,该光学散射粒子为PMMA(Polymethyl Methacrylate,聚甲基丙烯酸甲酯),也可以为其他高反射率的粒子。 Screen printing on the light guide plate 22 is scattered dots 224, the screen printing ink (not shown) added to the optical scattering particles 225, the optical scattering particles are PMMA (Polymethyl Methacrylate, polymethyl methacrylate), may also be other high particles reflectance. 其中,该网印油墨为IR(Infra-Red,红外线)基材,该光学散射粒子225为单一粒径(Mono Disperse)的微细球粒(Micro Sphere),其粒径大小介于1微米至10微米之间,该光学散射粒子225具有球状反射面。 Wherein the screen printing ink for the IR (Infra-Red, infrared) a substrate, the optical scattering particles 225 as a single particle (Mono Disperse) fine spherical particles (Micro Sphere), whose particle size is between 1 micron to 10 m between the optical scattering particles 225 having a spherical reflecting surface.

将具有球状反射面的光学散射粒子225加入网印油墨中,每一个散射网点224的微细结构中就增加多个小的球状表面截面的反射面。 The optical scattering particles having a spherical reflecting surface 225 join a printing ink in each dot scattering of the fine structure 224 increases the reflection surface a plurality of small cross-section of a spherical surface. 入射光线15入射到光学散射粒子225的反射面时,反射光线151的反射角度变得非常散乱,从而使反射光线151出射的角度非常散乱。 When incident light 15 is incident on the reflecting surface of the optical scattering particles 225, 151 reflection angle of light reflection becomes very scattered, so that the reflected light rays 151 exit angle is scattered. 而由于散射网点224结构中光学散射粒子225数目很多,所以从散射网点224整体发射出来的反射光线151的散射效果比无光学散射粒子225的散射效果要佳。 Since the number of scattering particles 225 and the scattering dot many optical structure 224, the overall emission from scattering out of the reflected light rays 224 dots 151 scattered 225 to effect good scattering effect than without the optical scattering particles.

请配合参照图5,是本实用新型导光板对光线作用示意图。 Please refer to FIG. 5 with, the present invention is a schematic diagram of the light guide plate effect. 其中因为各散射网点224均具有较强的散射能力,多个散射网点224的结合即可实现导光板22的整体散射能力,使得出射光线16自光出射面222均匀射出,进而提高导光板22及面光源装置2的均匀度。 Because the scatter network 224 in which each has a strong scattering power, in conjunction with a plurality of scattered dots 224 can be realized overall scattering ability of the light guide plate 22, so that the light 16 emitted from the light exit surface 222 is emitted uniformly, thus improving the light guide plate 22 and uniformity of the surface light source device 2. 其中散射网点224的光散射能力及出光均匀性和该散射网点224的几何大小无关,仅与每一散射网点224内的光学散射粒子225的大小、浓度、折射系数以及所采用的油墨材料的折射系数有关。 Wherein the scattered dots scattering power 224 and the uniformity of light and of the scattered dots 224 geometric size, and are based in each scattering outlets 224 of optical scattering particle size, concentration 225, refractive index and the refractive ink material is employed coefficient. 本实用新型导光板22的散射网点224大小可以一样,或随与光源距离的不同而规则变化。 Size dots 224 scattered light guide plate 22 of the present invention may be the same as, or different rules with the change in the distance from the light source.

Claims (10)

1.一种导光板,包括一用于接收光线的光入射面、一用于输出自该光入射面进入导光板的光线的光出射面及一与该光出射面相对的光反射面,其中该反射面设有多个散射网点,其特征在于:该多个散射网点包括多个反射面为球面的光学散射粒子。 1. A light guide comprising an output from the light guide plate of the light entering the incident surface of the light exit surface and a reflective surface opposite to the light exit surface for the light incident surface receiving a light, the light for a, wherein the reflective surface is provided with a plurality of scattered dots, wherein: the plurality of outlets comprises a plurality of scattering reflective surface is a spherical optical scattering particles.
2.如权利要求1所述的导光板,其特征在于:该光学散射粒子为单一粒径的微细球粒。 2. The light guide plate according to claim 1, wherein: the optical scattering of fine particles of single particle size pellets.
3.如权利要求1所述的导光板,其特征在于:该多个散射网点的大小相同。 The light guide plate according to claim 1, wherein: the plurality of scattered dots of the same size.
4.如权利要求1所述的导光板,其特征在于:该多个散射网点的大小随与光源距离的变化而规则变化。 4. The light guide plate according to claim 1, wherein: the plurality of scattering dot size changes with distance from the light source changes the rules.
5.如权利要求1所述的导光板,其特征在于:该导光板为平板型。 5. The light guide plate according to claim 1, wherein: the guide plate is a flat plate type.
6.如权利要求1所述的导光板,其特征在于:该导光板为楔型。 The light guide plate as claimed in claim 1, wherein: the light guide plate wedge.
7.一种面光源装置,包括至少一光源与一导光板,其中该导光板包括至少一用于接收光源发出的光线的光入射面、一用于输出自该光入射面进入导光板的光线的光出射面及一与该光出射面相对的光反射面,该至少一光源位于对应光入射面的一侧,该光反射面设有多个散射网点,其特征在于:该多个散射网点包括多个反射面为球面的光学散射粒子。 A surface light source device, comprising at least a light source and a light guide plate, wherein the guide plate comprises at least a light incident surface for receiving light emitted from the light source, a light output from a light incident surface of the light guide plate enters the light exit surface to the light and a reflecting surface opposite to the light exit surface, the at least one light source located at a side corresponding to the light incident surface, the light reflecting surface is provided with a plurality of scattered dots, wherein: the plurality of scattered dots a plurality of reflecting surfaces including a spherical optical scattering particles.
8.如权利要求7所述的面光源装置,其特征在于:该光学散射粒子为单一粒径的微细球粒。 8. The surface light source device according to claim 7, wherein: the optical scattering of fine particles of single particle size pellets.
9.如权利要求7所述的面光源装置,其特征在于:该面光源装置包括一反射板,位于导光板的光反射面一侧。 9. The surface light source device according to claim 7, wherein: the surface light source device comprising a reflecting plate, the light reflecting surface located at the side of the light guide plate.
10.如权利要求7所述的面光源装置,其特征在于:该面光源装置包括一扩散板,位于导光板的光出射面一侧。 10. The surface light source device according to claim 7, wherein: the surface light source device comprises a diffusion plate, located on the light exit side of the light guide plate.
CN 02250620 2002-12-21 2002-12-21 Light conducting panel and surface light source devices CN2594812Y (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
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WO2009003317A1 (en) * 2007-07-04 2009-01-08 Dongguan Memtech Electronic Products Co., Ltd Printed ultra thin light guiding plate
CN101852394A (en) * 2009-03-31 2010-10-06 富士胶片株式会社 Light guide plate
WO2011026432A1 (en) * 2009-09-04 2011-03-10 珠海格力电器股份有限公司 Indoor unit of wall-hanging type air conditioner and light emitting plate thereof
CN102073090A (en) * 2010-11-05 2011-05-25 深圳市华星光电技术有限公司 The light guide plate and backlight module
CN102382505A (en) * 2010-09-01 2012-03-21 奇美实业股份有限公司 Ink composition for forming patterns, light guide plate, luminous unit and liquid crystal display assembly provided with luminous unit
CN102483195A (en) * 2009-06-24 2012-05-30 冲孝二 Lighting device
CN102734693A (en) * 2011-04-12 2012-10-17 奇菱科技股份有限公司 Light-emitting device
CN102914813A (en) * 2011-08-04 2013-02-06 鸿富锦精密工业(深圳)有限公司 Composite light guide plate and manufacturing method thereof
US8702293B2 (en) 2010-11-05 2014-04-22 Shenzhen China Star Optoelectronics Technology Co., Ltd. Light guide plate and backlight module
CN104155715A (en) * 2014-07-16 2014-11-19 合肥鑫晟光电科技有限公司 Light guide device, backlight module group and display device
CN104991304B (en) * 2015-06-25 2019-02-22 东莞轩朗实业有限公司 Light guide plate, ink and inkjet printing method for manufacturing light guide plate

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101652706B (en) 2007-07-04 2012-09-05 万德国际有限公司 Printed ultra thin light guiding plate
WO2009003317A1 (en) * 2007-07-04 2009-01-08 Dongguan Memtech Electronic Products Co., Ltd Printed ultra thin light guiding plate
CN101852394A (en) * 2009-03-31 2010-10-06 富士胶片株式会社 Light guide plate
CN101852394B (en) * 2009-03-31 2013-07-10 富士胶片株式会社 Light guide plate
US8997387B2 (en) 2009-06-24 2015-04-07 Hayamizu Denki Kogyo Kabushikikaisha Light guide plate having diffused light printed dot pattern
CN102483195A (en) * 2009-06-24 2012-05-30 冲孝二 Lighting device
WO2011026432A1 (en) * 2009-09-04 2011-03-10 珠海格力电器股份有限公司 Indoor unit of wall-hanging type air conditioner and light emitting plate thereof
CN102382505A (en) * 2010-09-01 2012-03-21 奇美实业股份有限公司 Ink composition for forming patterns, light guide plate, luminous unit and liquid crystal display assembly provided with luminous unit
CN102073090B (en) 2010-11-05 2012-08-22 深圳市华星光电技术有限公司 Light guide plate and backlight module
US8702293B2 (en) 2010-11-05 2014-04-22 Shenzhen China Star Optoelectronics Technology Co., Ltd. Light guide plate and backlight module
CN102073090A (en) * 2010-11-05 2011-05-25 深圳市华星光电技术有限公司 The light guide plate and backlight module
WO2012058833A1 (en) * 2010-11-05 2012-05-10 深圳市华星光电技术有限公司 Light guide plate and backlight module
CN102734693A (en) * 2011-04-12 2012-10-17 奇菱科技股份有限公司 Light-emitting device
CN102914813A (en) * 2011-08-04 2013-02-06 鸿富锦精密工业(深圳)有限公司 Composite light guide plate and manufacturing method thereof
CN104155715A (en) * 2014-07-16 2014-11-19 合肥鑫晟光电科技有限公司 Light guide device, backlight module group and display device
CN104991304B (en) * 2015-06-25 2019-02-22 东莞轩朗实业有限公司 Light guide plate, ink and inkjet printing method for manufacturing light guide plate

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