CN104714339A - 光配向装置 - Google Patents
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- G—PHYSICS
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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
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- G02F1/13378—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation
- G02F1/133788—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation by light irradiation, e.g. linearly polarised light photo-polymerisation
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- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
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- G—PHYSICS
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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
- 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
- G02B6/0041—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided in the bulk of 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
- G02B6/0033—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
- G02B6/0045—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 by shaping at least a portion of the light guide
- G02B6/0046—Tapered light guide, e.g. wedge-shaped 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
- G02B6/0033—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
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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
- G02B6/0053—Prismatic sheet or layer; Brightness enhancement element, sheet or layer
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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
- G02B6/0055—Reflecting element, sheet or layer
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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
- G02B6/0056—Means for improving the coupling-out of light from the light guide for producing polarisation effects, e.g. by a surface with polarizing properties or by an additional polarizing elements
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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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Abstract
本发明涉及显示技术领域,公开了一种光配向装置,包括:UV光源、导光板和偏振片,所述UV光源发出的光照射入所述导光板,所述偏振片位于导光板的光出射面的一侧。本发明的光配向装置通过导光板中内部扩散光线的微结构使光线能够尽量均匀、垂直地照射到配向膜表面,整个配向膜表面吸收的光积量更加均匀,整个配向膜表面配向能力均匀性更好,在显示时能够更好降低暗态的亮度,从而实现更高的对比度,提升显示效果。
Description
技术领域
本发明涉及显示技术领域,特别涉及一种光配向装置。
背景技术
液晶显示(LCD)面板通常包括两个基板(阵列基板和彩膜基板),插设在它们之间的液晶层以及基板外面的偏光片。这两个基板分别具有用于形成电场的像素电极和公共电极。LCD通过施加电压到电极在液晶层中产生电场,以确定液晶层的液晶分子的取向并控制入射光的偏振,从而产生图像显示。在施加电压前,需要使液晶分子有一个初始取向方向,因此显示面板中设有光配向膜。如图1所示,这是传统的制造液晶显示面板的光配向装置示意图,包括:UV光源110和偏振片120。采用现有的光配向装置对配向膜进行配向的示意图如图2所示,UV光源110发射光线,经过偏振片120后形成偏振光再照射到位于基板140表面的配向膜130上。通过采用光配向装置实现光配向技术取向方式取代现有摩擦布取向方式,能够有效改善采用摩擦布取向造成的多种不良,同时,能精确确定液晶分子的预倾角,实现更好的显示效果。但该偏振光不是垂直均匀分布的,需要工艺调整,如通过移动承载台多次来回照射来调整使光线能尽量照射且能量均匀,这种方法能在一定程度上改善光照均匀性,但是不能完全改善。光配向在照射配向膜时需要尽量保持光线的均匀性,才能使整个基板的配向膜表面吸收能量的均匀性,如果不能保持均匀性,这样有些区域曝光过度,有些区域曝光不够,从而影响配向膜的配向性,最终影响画质显示。
发明内容
(一)要解决的技术问题
本发明要解决的技术问题是:如何使光线能够均匀地照射到配向膜表面。
(二)技术方案
为解决上述技术问题,本发明提供了一种光配向装置,包括:UV光源、导光板和偏振片,所述UV光源发出的光照射入所述导光板,所述偏振片位于导光板的光出射面的一侧。
其中,所述UV光源位于导光板的侧棱的一侧,与所述光出射面相对的一面上方还设有反光板。
其中,所述UV光源还设有用于反射光线的灯罩。
其中,所述UV光源位于导光板光出射面相对的一侧。
其中,还包括位于所述光出射面相对一侧的反光板,所述UV光源位于反光板和导光板之间。
其中,还包括位于所述导光板光出射面一侧的扩散片和棱镜片两者至少之一。
其中,所述扩散片位于所述导光板和偏振片之间。
其中,所述棱镜片位于所述导光板和偏振片之间。
其中,扩散片和棱镜片均位于所述导光板和偏振片之间。
其中,所述棱镜片位于所述扩散片和偏振片之间。
(三)有益效果
本发明的光配向装置通过导光板中内部扩散光线的微结构使光线能够尽量均匀、垂直地照射到配向膜表面,整个配向膜表面吸收的光积量更加均匀,整个配向膜表面配向能力均匀性更好,在显示时能够更好降低暗态的亮度,从而实现更高的对比度,提升显示效果。
附图说明
图1是现有技术中的一种光配向装置结构示意图;
图2是采用图1中光配向装置进行光配向的示意图;
图3是本发明实施例的一种光配向装置结构示意图;
图4是采用图3中的光配向装置进行光配向的示意图;
图5是本发明实施例的另一种光配向装置结构示意图。
具体实施方式
下面结合附图和实施例,对本发明的具体实施方式作进一步详细描述。以下实施例用于说明本发明,但不用来限制本发明的范围。
本发明的光配向装置包括:UV光源、导光板和偏振片。所述UV光源发出的光照射入所述导光板,所述偏振片位于导光板的光出射面的一侧。通过设计导光板的网点结构,使光线照射到各个导光点时,反射光往各个角度扩散,最终由导光板出光面射出,通过各种疏密、大小不一的导光点,可使经过导光板的光均匀发射出来。这样,导光板中内部扩散光线的微结构使光线能够均匀出射,经过偏振片后尽量均匀、垂直地照射到配向膜表面,整个配向膜表面吸收的光积量更加均匀,整个配向膜表面配向能力均匀性更好,在显示时能够更好降低暗态的亮度,从而实现更高的对比度,提升显示效果。
本发明实施例的一种光配向装置如图3所示,UV光源310位于导光板350的侧棱的一侧,与光出射面相对的一面上方还设有反光板380。由于导光板350是透明材质,若与光出射面相对的一面没有反光板380的话,光会损失掉一部分,光的利用率低,反光板380将从与光出射面相对的一面出射的光反射回导光板350,从而提高了光的利用率。偏振片320位于导光板350的光出射面的一侧。
进一步地,UV光源310还设有用于反射光线的灯罩390,使UV光尽可能全部都照射进导光板350。
进一步地,为了使出射光更加均匀,还包括位于导光板350光出射面一侧的扩散片360。其中,扩散片360工作原理是借有扩散物质的折射和反射将光源雾化,并将光由小角度出光集中到正面以提高正面辉度,将光集中起来均匀投射出来。
进一步地,为了使光更加垂直地照射到配向膜表面,还包括位于导光板350光出射面一侧的棱镜片370。棱镜片370的作用是改善光的角分布,它可以将均匀地向各个角度发散的光汇聚到轴向角度上,也就是正视角度上,在不增加出射总光通量的情况下提高轴向亮度。即光可以垂直的照射到表面。
扩散片360、棱镜片370和偏振片320三者位于导光板350的光出射面一侧的顺序可任意设置,优选地,扩散片360位于导光板350和偏振片320之间;或棱镜片370位于导光板350和偏振片320之间;或扩散片360和棱镜片370均位于导光板350和偏振片320之间,棱镜片370位于扩散片360和偏振片320之间,这样保证最终出射的是均匀、垂直的偏振光。
如图4所示,本实施例的光配向装置的出射的偏振光均匀地照射到位于基板340上的配向膜330的表面。
上述实施例中,UV光源位于导光板的侧棱的一侧,形成侧入式的导光结构,还可以是直下式的导光结构。
本发明另一实施例的光配向装置如图5所示,UV光源510位于导光板550光出射面相对的一侧。还包括位于光出射面相对一侧的反光板580,UV光源510位于反光板580和导光板550之间。偏振片520位于导光板550的光出射面的一侧。
进一步地,为了使出射光更加均匀,还包括位于导光板550光出射面一侧的扩散片560。其中,扩散片560工作原理是借有扩散物质的折射和反射将光源雾化,并将光由小角度出光集中到正面以提高正面辉度,将光集中起来均匀投射出来。
进一步地,为了使光更加垂直地照射到配向膜表面,还位于导光板550光出射面一侧的棱镜片570。棱镜片570的作用是改善光的角分布,它可以将均匀地向各个角度发散的光汇聚到轴向角度上,也就是正视角度上,在不增加出射总光通量的情况下提高轴向亮度。即光可以垂直的照射到表面。
扩散片560、棱镜片570和偏振片520三者位于导光板550的光出射面一侧的顺序可任意设置,优选地,扩散片560位于导光板550和偏振片520之间;或棱镜片570位于导光板550和偏振片520之间;或扩散片560和棱镜片570均位于导光板550和偏振片520之间,棱镜片570位于扩散片560和偏振片520之间,这样保证最终出射的是均匀、垂直的偏振光。
上述实施例的光配向装置中的导光板和显示装置的背光源中导光板结构和原理相似,此处不再赘述。
光配向装置的大小根据基板横向长度进行设置,使用一个UV光源即可,实现了对基板横向完全均匀照射,只需要将基板纵向移动一次就能完成对配向膜的曝光。因此,该装置相对于传统装置,不但能保证偏振光能均匀地照射到配向膜表面,还能够减少光源的使用数量,从而降低成本。同时,使用该装置移动一次就能完成曝光,能够减少照射时间而提高工艺效率,提升产能。
以上实施方式仅用于说明本发明,而并非对本发明的限制,有关技术领域的普通技术人员,在不脱离本发明的精神和范围的情况下,还可以做出各种变化和变型,因此所有等同的技术方案也属于本发明的范畴,本发明的专利保护范围应由权利要求限定。
Claims (10)
1.一种光配向装置,其特征在于,包括:UV光源、导光板和偏振片,所述UV光源发出的光照射入所述导光板,所述偏振片位于导光板的光出射面的一侧。
2.如权利要求1所述的光配向装置,其特征在于,所述UV光源位于导光板的侧棱的一侧,与所述光出射面相对的一面上方还设有反光板。
3.如权利要求2所述的光配向装置,其特征在于,所述UV光源还设有用于反射光线的灯罩。
4.如权利要求1所述的光配向装置,其特征在于,所述UV光源位于导光板光出射面相对的一侧。
5.如权利要求4所述的光配向装置,其特征在于,还包括位于所述光出射面相对一侧的反光板,所述UV光源位于反光板和导光板之间。
6.如权利要求1~5中任一项所述的光配向装置,其特征在于,还包括位于所述导光板光出射面一侧的扩散片和棱镜片两者至少之一。
7.如权利要求6所述的光配向装置,其特征在于,所述扩散片位于所述导光板和偏振片之间。
8.如权利要求6所述的光配向装置,其特征在于,所述棱镜片位于所述导光板和偏振片之间。
9.如权利要求6所述的光配向装置,其特征在于,扩散片和棱镜片均位于所述导光板和偏振片之间。
10.如权利要求9所述的光配向装置,其特征在于,所述棱镜片位于所述扩散片和偏振片之间。
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CN201510152811.8A CN104714339A (zh) | 2015-04-01 | 2015-04-01 | 光配向装置 |
US15/074,281 US20160291415A1 (en) | 2015-04-01 | 2016-03-18 | Optical alignment device |
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CN106681058A (zh) * | 2016-12-28 | 2017-05-17 | 深圳市华星光电技术有限公司 | 光配向设备 |
CN108803150A (zh) * | 2018-06-19 | 2018-11-13 | 深圳市华星光电技术有限公司 | 光照装置及对mmg面板进行配向的方法 |
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CN110888267B (zh) * | 2019-11-26 | 2020-12-08 | Tcl华星光电技术有限公司 | 液晶配向装置及其操作方法 |
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CN1854900A (zh) * | 2005-04-20 | 2006-11-01 | 优志旺电机株式会社 | 偏振光照射装置 |
CN101498866A (zh) * | 2008-02-01 | 2009-08-05 | 深圳富泰宏精密工业有限公司 | 液晶光学配向装置及方法 |
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CN106681058A (zh) * | 2016-12-28 | 2017-05-17 | 深圳市华星光电技术有限公司 | 光配向设备 |
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CN108803150A (zh) * | 2018-06-19 | 2018-11-13 | 深圳市华星光电技术有限公司 | 光照装置及对mmg面板进行配向的方法 |
CN108803150B (zh) * | 2018-06-19 | 2021-01-26 | Tcl华星光电技术有限公司 | 光照装置及对mmg面板进行配向的方法 |
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