CN104834127B - 一种显示面板及投影显示装置 - Google Patents
一种显示面板及投影显示装置 Download PDFInfo
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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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- 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
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- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
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- G02F1/13363—Birefringent elements, e.g. for optical compensation
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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
本发明涉及到显示装置的技术领域,公开了一种显示面板及投影显示装置。该显示面板包括:反射板;相位延迟片,用于改变穿过的光线的偏振方向;黑色吸光矩阵,用于吸收光线;偏振散射膜,投影仪照射出的偏振光线穿过偏振散射膜后,沿原光线路径传播,经相位延迟片及反射片后再次照射到偏振散射膜后光线发生散射;其他偏振方向的光线在射入到偏振散射膜后发生散射,且散射的光线被黑色吸光矩阵吸收。本发明的有益效果为:通过采用偏振散射膜及相位延迟片的配合,使得只有投影仪发射出的偏振光能够通过显示面板显示出来,外部的光线被偏振散射膜散射掉,从而改善了显示的画面受到外部光线的干扰的情况,提高了显示面板的显示效果。
Description
技术领域
本发明涉及到显示装置的技术领域,尤其涉及到一种显示面板及投影显示装置。
背景技术
近年来,随着液晶显示LCD(Liquid Crystal Display)和数字光处理器DLP(Digital Light Processing)的关键技术得到突破,大屏幕、高亮度的电子投影显示系统在现代多媒体信息显示中获得了广泛的应用。投影仪、液晶显示器和等离子体显示器PDP(Plasma Display Panel)正在显示器市场上形成三分天下的局面。在不足30英寸的显示器中,液晶显示器已成为该市场的主角;30英寸到70英寸的显示器市场将是PDP的天下;而70英寸以上的显示器中,投影仪则成为该市场的主流。
但是投影仪有个缺点就是将图像投影到散射面上,容易受到环境光线的影响,与环境光混合散射后造成色域和对比度下降。从而影响显示效果。
发明内容
本发明提供了一种显示面板及投影显示装置,用以改善投影显示装置的显示的画面受到外界光线干扰的情况,提高显示效果。
本发明提供了一种显示面板,该显示面板包括:
反射板;
相位延迟片,设置在所述反射板上并用于改变穿过的光线的偏振方向;
黑色吸光矩阵,设置在所述相位延迟片上并用于吸收光线;
偏振散射膜,设置在所述黑色吸光矩阵上,且投影仪照射出的偏振光线穿过所述偏振散射膜后,沿原光线路径传播,经所述相位延迟片改变偏振方向并经所述反射板反射后再次照射到所述偏振散射膜后光线发生散射;其他偏振方向的光线在射入到所述偏振散射膜后发生散射,且散射的光线被所述黑色吸光矩阵吸收。
在上述实施例中,通过采用偏振散射膜有选择的让光线穿透过去,其中,一偏振方向偏振光能够穿过偏振散射膜沿其原方向传播过去,另一偏振方向振光在穿过偏振散射膜后发生散射,从而被位于偏振散射膜后方的黑色吸光矩阵吸收掉,沿原方向传播的偏振光在相位延迟片反射后偏振方向发生改变,并在再次穿过偏振散射膜后发生散射,从而使得欣赏者能够观察到显示的画面。在上述具体过程中,通过偏振散射膜及相位延迟片的配合,使得只有投影仪发射出的偏振光能够通过显示面板显示出来,外部的光线被偏振散射膜散射掉,从而改善了显示的画面受到外部光线的干扰的情况,提高了显示面板的显示效果。
优选的,所述偏振散射膜包括对盒的两个基板,设置在所述两个基板之间的液晶层以及打乱所述液晶层中的液晶分子取向的聚合物网络。具有良好的偏振散射效果。
优选的,所述相位延迟片为四分之一相位延迟片。改变偏振光线的偏振方向。
优选的,所述黑色吸光矩阵为防窥黑色吸光矩阵。
优选的,所述黑色吸光矩阵之间的间距介于1~100um,高度介于1~1000um。
本发明还提供了一种投影显示装置,该投影显示装置包括投影仪以及上述任一项的显示面板。
在上述实施例中,通过采用偏振散射膜有选择的让光线穿透过去,其中,一偏振方向偏振光能够穿过偏振散射膜沿其原方向传播过去,另一偏振方向振光在穿过偏振散射膜后发生散射,从而被位于偏振散射膜后方的黑色吸光矩阵吸收掉,沿原方向传播的偏振光在相位延迟片反射后偏振方向发生改变,并在再次穿过偏振散射膜后发生散射,从而使得欣赏者能够观察到显示的画面。在上述具体过程中,通过偏振散射膜及相位延迟片的配合,使得只有投影仪发射出的偏振光能够通过显示面板显示出来,外部的光线被偏振散射膜散射掉,从而改善了显示的画面受到外部光线的干扰的情况,提高了显示面板的显示效果。
附图说明
图1为本发明实施例提供的显示面板的结构示意图;
图2为本发明实施例提供的偏振散射膜的结构示意图;
图3为本发明实施例提供的显示面板的工作状态示意图;
图4为本发明实施例提供的显示面板的黑色吸光矩阵的结构示意图。
附图标记:
10-反射板 20-相位延迟片 30-黑色吸光矩阵
40-偏振散射膜 41-第一基板 42-第二基板
43-液晶层 44-聚合物网络
具体实施方式
为了提高现有技术中的投影显示装置的显示效果,本发明实施例提供了一种显示面板及投影显示装置。在本发明实施例的技术方案中,通过采用偏振扩散膜只能反射投影仪发射出的光线,并将其他的光线扩散掉,从而使得显示的画面更加清晰,进而提高了投影显示装置的显示效果。为使本发明的目的、技术方案和优点更加清楚,以下以非限制性的实施例为例对本发明作进一步详细说明。
如图1、图2及图3所示,其中,图1为本发明实施例提供的显示面板的结构示意图;图2为本发明实施例提供的偏振散射膜40的结构示意图;图3为本发明实施例提供的显示面板的工作状态示意图。
本发明提供了一种显示面板,该显示面板包括:
反射板10;
相位延迟片20,设置在反射板10上并用于改变穿过的光线的偏振方向;
黑色吸光矩阵30,设置在相位延迟片20上并用于吸收光线;
偏振散射膜40,设置在黑色吸光矩阵30上,且投影仪照射出的偏振光线穿过偏振散射膜40后,沿原光线路径传播,经相位延迟片20改变偏振方向并经反射板反射后再次照射到偏振散射膜40后光线发生散射;其他偏振方向的光线在射入到偏振散射膜40后发生散射,且散射的光线被黑色吸光矩阵30吸收。
反射板10,设置在所述反射板10上的相位延迟片20,设置在所述相位延迟片20上的黑色吸光矩阵30,以及设置在所述黑色吸光矩阵30上的偏振散射膜40,其中,所述偏振散射膜40允许从投影仪方向照射过来的偏振光线穿过,并将所述反射板反射回的光线在经所述相位延迟片20改变偏振方向后散射出。
在上述实施例中,通过采用偏振散射膜40有选择的让光线穿透过去,具体的,如图2所示,一偏振方向偏振光能够穿过偏振散射膜40沿其原方向传播过去,另一偏振方向振光在穿过偏振散射膜40后发生散射,从而被位于偏振散射膜40后方的黑色吸光矩阵30吸收掉,沿原方向传播的偏振光在相位延迟片20反射后偏振方向发生改变,并在再次穿过偏振散射膜后发生散射,从而使得欣赏者能够观察到显示的画面。在上述具体过程中,通过偏振散射膜40及相位延迟片20的配合,使得只有投影仪发射出的偏振光能够通过显示面板显示出来,外部的光线被偏振散射膜40散射掉,从而改善了显示的画面受到外部光线的干扰的情况,提高了显示面板的显示效果。
为了方便对本实施例提供的显示面板的结构及功能的理解,下面结合附图1、图2、图3及图4对其结构及工作原理进行详细的说明。
如图1所示,本实施例提供的显示面板包括具有反射功能的反射板10,设置在反射板10上的相位延迟片20,该相位延迟片20为四分之一相位延迟片20,通过相位延迟片20照射到反射板10的光线经反射板10反射后再次照射过相位延迟片20后,光线的偏振方向改变九十度。并再次经过黑色吸光矩阵30后照射到偏振散射膜40上,经相位延迟片20改变偏振方向后的光线再经过偏振散射膜40后发生散射,从而使得显示面板可以显示画面,欣赏者可以在不同的角度观察到画面。即原理如图3所示,由投影机发出的光线第一次经过散射膜时光线方向不发生变化,经过四分之一相位延迟片20和反射板10之后,光线偏振态旋转90度,再次经过散射膜时,发生散射,从而形成图像。
其中的偏振散射膜40为针对不同方向偏振的光线选择性通过的膜材,其具体的结构如图2所示,由图2可以看出,本实施例提供的偏振散射膜40包括:对盒的两个基板,设置在所述两个基板之间的液晶层43以及打乱所述液晶层43中的液晶分子取向的聚合物网络44。其中,对盒的两个基板分别为第一基板41及第二基板42。且液晶层43填充在第一基板41及第二基板42之间,该液晶层43的液晶分子的取向通过聚合物网络44改变,具体的,液晶分子在聚合物网络44的作用下,取向被打乱,虽然取向混乱,但是液晶分子均平行于纸面(偏振散射膜40如图2所示的放置方向时),因此在垂直于纸面的偏振光(如图带圆圈的箭头)通过该膜材的时候折射率均为n0,因此对光线没有散射作用,而当如图带横线的箭头的偏振光通过时,受到液晶散乱的影响,光线被散射,从而可以观看到显示面板显示的画面。其中,偏振散射膜40在制作时采用偏振的紫外线光线对取向过的液晶盒进行固化即可形成。
其中的黑色吸光矩阵30如图4所示,黑色吸光矩阵30为防窥黑色吸光矩阵30。具体的,黑色矩阵的设计按照普通的防窥膜设计即可,但是为了保证显示效果,线宽(即黑矩阵之间的间距)窄一些较好(宽度1~100um,高度1~1000um)。即宽度10μm、高度100μm,宽度20μm、高度200μm,宽度30μm、高度300μm,宽度40μm、高度400μm,宽度50μm、高度500μm,宽度60μm、高度600μm,宽度70μm、高度700μm,宽度80μm、高度800μm,宽度90μm、高度900μm,宽度100μm、高度1000μm,等任意处于线宽介于1~100um,高度介于1~1000um之间的尺寸值。
本发明还提供了一种投影显示装置,该投影显示装置包括投影仪以及上述任一项的显示面板。
在上述实施例中,通过采用偏振散射膜40有选择的让光线穿透过去,具体的,如图2所示,一部分偏振光能够穿过偏振散射膜40沿其原方向传播过去,另一部分偏振光在穿过偏振散射膜40后发生散射,从而被位于偏振散射膜40后方的黑色吸光矩阵30吸收掉,沿原方向传播的偏振光在相位延迟片20反射后偏振方向发生改变,并在再次穿过偏振散射膜后发生散射,从而使得欣赏者能够观察到显示的画面。在上述具体过程中,通过偏振散射膜40及相位延迟片20的配合,使得只有投影仪发射出的偏振光能够通过显示面板显示出来,外部的光线被偏振散射膜40散射掉,从而改善了显示的画面受到外部光线的干扰的情况,提高了显示面板的显示效果。
显然,本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样,倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内,则本发明也意图包含这些改动和变型在内。
Claims (6)
1.一种显示面板,其特征在于,包括:
反射板;
相位延迟片,设置在所述反射板上并用于改变穿过的光线的偏振方向;
黑色吸光矩阵,设置在所述相位延迟片上并用于吸收光线;
偏振散射膜,设置在所述黑色吸光矩阵上,且投影仪照射出的偏振光线穿过所述偏振散射膜后,沿原光线路径传播,经所述相位延迟片改变偏振方向并经所述反射板反射后再次照射到所述偏振散射膜后光线发生散射;其他偏振方向的光线在射入到所述偏振散射膜后发生散射,且散射的光线被所述黑色吸光矩阵吸收。
2.如权利要求1所述的显示面板,其特征在于,所述偏振散射膜包括对盒的两个基板,设置在所述两个基板之间的液晶层以及打乱所述液晶层中的液晶分子取向的聚合物网络。
3.如权利要求1所述的显示面板,其特征在于,所述相位延迟片为四分之一相位延迟片。
4.如权利要求1所述的显示面板,其特征在于,所述黑色吸光矩阵为防窥黑色吸光矩阵。
5.如权利要求4所述的显示面板,其特征在于,所述黑色吸光矩阵之间的间距介于1~100um,高度介于1~1000um。
6.一种投影显示装置,其特征在于,包括投影仪以及如权利要求1~5任一项所述的显示面板。
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