CN107807484A - 一种反射式电致变色显示面板 - Google Patents
一种反射式电致变色显示面板 Download PDFInfo
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Abstract
本发明公开了一种反射式电致变色显示面板,所述反射式电致变色显示面板包括:自上而下依次设置的上基板、公共电极层,电致变色层、像素电极层和下基板,所述电致变色层包括红色电致变色层、绿色电致变色层以及蓝色电致变色层,所述电致变色层在接受电压时反射对应颜色的光,在未接收电压时反射光为零。本发明在显示面板中设置电致变色层,并利用电致变色层不同的电压特性,提高显示面板对光的利用率和视角限制性等问题,从而改善了液晶显示器的特性。
Description
技术领域
本发明涉及液晶显示器技术领域,特别是涉及一种反射式电致变色显示面板。
背景技术
随着显示技术发展,出现了利用电致变色材料的显示面板。相比于TFT-LCD,电致变色显示面板不需要使用偏光片以及色阻,可以很大程度的提高显示器对光的利用率,且其具有不依赖视角,和记忆功能等优点。
传统电致变色器件的制备方法主要是在导电玻璃上沉积或聚合电致变色薄膜。其实现彩色显示通常是三种颜色的电致变色材料来实现,包括:红色电致变色材料、绿色电致变色材料以及蓝色电致变色材料,上述三种电致变色材料在通电时分别发生氧化还原反应而呈现红色、绿色、和蓝色,且不同电压可控制不同颜色光输出的亮度,实现彩色显示;在不通电时,三种颜色电致变色材料均为透明态。但是在传统的透射式显示器中,电致变色显示器无法实现黑色显示,且其需要背光源。
而根据所使用的光源的类型和光源的设置方式,液晶液晶显示器可分为透射式液晶显示器、半透半反式液晶显示器和反射式液晶显示器,其中反射式液晶显示器由于其可以利用环境光线来显示,无需耗能高的背光源,因此其在移动设备以及可穿戴显示设备应用中具有很大的潜力。
但是该反射式液晶显示器有两个问题:1.由于环境光会来回两次经过各膜层特别是色阻层,导致环境光损耗较大,亮度利用率低,容易导致液晶面板显示画面亮度较暗;2.为了使观察者在多个视角都能观看到的反射图像,金属反射电极必须设计为漫反射的反射方式,而采用这种方式极易产生亮度不均和视角限制等问题。
发明内容
本发明解决的技术问题是,提供一种反射式电致变色显示面板,通过改变液晶面板内部结构,并利用电致发光材料对入射光进行反射,改善了液晶显示器的特性。
为解决上述技术问题,本发明提供了一种反射式电致变色显示面板,所述显示面板包括:
自上而下依次设置的上基板、公共电极层,电致变色层、像素电极层和下基板;所述电致变色层包括红色电致变色层、绿色电致变色层以及蓝色电致变色层,所述红色电致变色层在接收电压时反射红光,所述绿色电致变色层在接收电压时反射绿光,所述蓝色电致变色层在接收电压时反射蓝光,且反射光强度随电压的增加而增加;所述红色电致变色层、所述绿色电致变色层和所述蓝色电致变色层在未接收电压时反射光为零。
其中,所述公共电极层和所述像素电机层均为透明电机层。
可选的,所述公共电极层和像素电极层材料为ITO(氧化铟锡)。
可选的,所述电致变色层的材料包括紫罗精、聚噻吩类及其衍生物、聚苯胺类化合物、吡啶的化合物、蒽醌的化合物、稀土元素的有机化合物中的一种或多种。
其中,所述红色电致变色层、绿色电致变色层以及蓝色电致变色层之间设置有分隔部。
可选的,所述下基板为黑色遮光衬底。
可选的,所述下基板为透明衬底,所述透明衬底上设有黑色遮光层。
其中,所述黑色遮光层材料为Cr金属、掺入黑色颜料的丙烯酸树脂或在光刻胶中掺入碳、Ti、Ni等原料形成的黑色树脂。
其中,所述像素电极层包括:薄膜晶体管、源极、漏极以及对应的绝缘层。
其中,所述上基板为玻璃衬底基板、透明薄膜封装或透明的柔性衬底基板其中的一种。
本发明的有益效果是:区别于现有技术,本发明在显示面板中设置电致变色层,并利用电致变色层不同的电压特性,提高显示面板对光的利用率和视角限制性等问题,从而改善了液晶显示器的特性。此外,本发明采用反射式液晶显示器的基本构造对比与一般显示技术有效降低了设备能耗,并且通过反射式液晶显示器的原理,解决了一般电致变色显示器无法显示黑色的缺点。
附图说明
图1是本发明反射式电致变色显示面板一实施例的结构示意图;
图2是本发明反射式电致变色显示面板另一实施例的结构示意图;
图3本发明反射式电致变色显示面板一实施例处于第一工作状态时的显示原理图;
图4是本发明反射式电致变色显示面板一实施例处于第二工作状态时的显示原理图。
具体实施方式
请参阅图1,图1是本发明反射式电致变色显示面板一实施例的结构示意图。反射式电致变色显示面板包括:自上而下依次设置的上基板1、公共电极层2,电致变色层、像素电极层6和下基板8。在本实施例中,上基板1为玻璃衬底基板。在其他实施例中,上基板1还可以是透明薄膜封装或透明的柔性衬底基板其中的一种。电致变色层包括红色电致变色层3、绿色电致变色层4以及蓝色电致变色层5。下基板8为透明衬底,下基板8上设置有黑色遮光层7。在本实施例中,遮光层材料为Cr金属、掺入黑色颜料的丙烯酸树脂或在光刻胶中掺入碳、Ti、Ni等原料形成的黑色树脂。黑色遮光层7能够吸收外部光线,使外部光线不会对屏幕显示造成影响。电致变色层设置在公共电极层2与像素电极层6之间。在本实施例中,像素电极层6包括薄膜晶体管、源极、漏极以及对应的绝缘层。像素电极层6的结构与现有液晶面板中的结构一致,此处不再赘述。红色电致变色层3、绿色电致变色层4以及蓝色电致变色层5之间设置有分隔部9,避免红色电致变色层3、绿色电致变色层4以及蓝色电致变色层5之间出现混色。在本实施例中,公共电极层2和像素电机层6均为透明电极层,以利于透光。优选的,公共电极层2和像素电极层6材料为ITO(氧化铟锡)材料。为了保证显示面板的显示效果,公共电极层2和像素电机层6以及电致变色层(3、4、5)间隔设置,保证间隔设置的公共电极层2和像素电机层6以及电致变色层(3、4、5)之间绝缘。电致变色层(3、4、5)的材料包括紫罗精、聚噻吩类及其衍生物、聚苯胺类化合物、吡啶的化合物、蒽醌的化合物、稀土元素的有机化合物中的一种或多种。
在另一个具体的实施方式中,如图2所示,下基板202为黑色不透明衬底,下基板202能够吸收外部光线,使外部光线不会对屏幕显示造成影响。
以下,详细说明本发明的显示面板的工作方法。
像素电极层6和公共电极层2加载外部电压,通过无源矩阵电极驱动控制电压,具体的,像素电极层6和公共电极层2,通过选址线选择电致变色层(3、4、5),进而控制每个电致变色层(3、4、5)的电压。此外,像素电极层6和公共电极层2之间通过TFT(薄膜晶体管开关)电连接,通过TFT开关控制外部加载电压。
当红色电致变色层3、绿色电致变色层4和蓝色电致变色层5在未接收电压时,如图3所示,红色电致变色层3、所述绿色电致变色层4和所述蓝色电致变色层5显示为透明状态,不对外部光线进行反射,此时显示面板显示黑色。即反射光302、反射光304和反射光306被电致变色层3、绿色电致变色层4和蓝色电致变色层5吸收。
当施加外部电压时,如图4所示,入射光通过透明金属电极(公共电极层2)后,入射光进入电致变色层(3、4、5),直接在电致变色层(3、4、5)对入射光进行反射。绿色电致变色层3对入射光401进行反射,并反射绿光402;红色电致变色层4对入射光403进行反射,并反射绿光404;蓝色电致变色层5对反射光405进行反射,并反射蓝光406。而且,反射光强度随电压的增加而增加。显示面板进一步叠加反射的红光、绿光以及蓝光,使得各点能达到全彩化显示效果。
本发明利用电致放光材料的光学属性(反射率、穿透率、吸收率等),在外加电场的作用下发生稳定且具有可逆性的颜色变化反应,表现为颜色和透明度的可逆变化。无需像传统的反射式液晶显示器来回两次穿过色阻层和液晶层,增加了器件对环境光的利用率。
区别于现有技术,本发明在显示面板中设置电致变色层,并利用电致变色层不同的电压特性,提高显示面板对光的利用率和视角限制性等问题,从而改善了液晶显示器的特性。此外,本发明采用反射式液晶显示器的基本构造对比与一般显示技术有效降低了设备能耗,并且通过反射式液晶显示器的原理,解决了一般电致变色显示器无法显示黑色的缺点。
以上所述仅为本发明的实施方式,并非因此限制本发明的专利范围,凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换,或直接或间接运用在其他相关的技术领域,均同理包括在本发明的专利保护范围内。
Claims (10)
1.一种反射式电致变色显示面板,其特征在于,包括:自上而下依次设置的上基板、公共电极层,电致变色层、像素电极层和下基板;所述电致变色层包括红色电致变色层、绿色电致变色层以及蓝色电致变色层,所述红色电致变色层在接收电压时反射红光,所述绿色电致变色层在接收电压时反射绿光,所述蓝色电致变色层在接收电压时反射蓝光,且反射光强度随电压的增加而增加;
所述红色电致变色层、所述绿色电致变色层和所述蓝色电致变色层在未接收电压时反射光为零。
2.根据权利要求1所述的反射式电致变色显示面板,其特征在于,所述公共电极层和所述像素电机层均为透明电机层。
3.根据权利要求2所述的反射式电致变色显示面板,其特征在于,所述公共电极层和像素电极层材料为ITO。
4.根据权利要求1所述的反射式电致变色显示面板,其特征在于,所述电致变色层的材料包括紫罗精、聚噻吩类及其衍生物、聚苯胺类化合物、吡啶的化合物、蒽醌的化合物、稀土元素的有机化合物中的一种或多种。
5.根据权利要求1所述的反射式电致变色显示面板,其特征在于,所述红色电致变色层、绿色电致变色层以及蓝色电致变色层之间设置有分隔部。
6.根据权利要求1所述的反射式电致变色显示面板,其特征在于,所述下基板为黑色遮光衬底。
7.根据权利要求1所述的反射式电致变色显示面板,其特征在于,所述下基板为透明衬底,所述透明衬底上设有黑色遮光层。
8.据权利要求7所述的反射式电致变色显示面板,其特征在于,所述黑色遮光层材料为Cr金属、掺入黑色颜料的丙烯酸树脂或在光刻胶中掺入碳、Ti、Ni等原料形成的黑色树脂。
9.根据权利要求1所述的反射式电致变色显示面板,其特征在于,所述像素电极层包括:薄膜晶体管、源极、漏极以及对应的绝缘层。
10.根据权利要求1所述的反射式电致变色显示面板,其特征在于,所述上基板为玻璃衬底基板、透明薄膜封装或透明的柔性衬底基板其中的一种。
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WO2022088152A1 (zh) * | 2020-10-31 | 2022-05-05 | 华为技术有限公司 | 反射式显示器件、显示面板及显示屏 |
CN115113449A (zh) * | 2022-07-14 | 2022-09-27 | 惠州华星光电显示有限公司 | 电致变色显示面板的制作方法和电致变色显示面板 |
CN116665613A (zh) * | 2023-06-29 | 2023-08-29 | 惠科股份有限公司 | 显示面板的驱动方法、显示面板和显示装置 |
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CN115335765A (zh) | 2020-03-19 | 2022-11-11 | 弗尔甚普股份公司 | 电致变色器件及其制造方法 |
CN112419879B (zh) * | 2020-11-30 | 2022-09-20 | 武汉天马微电子有限公司 | 一种显示面板及显示装置 |
CN115061322B (zh) * | 2022-06-17 | 2023-10-24 | 云谷(固安)科技有限公司 | 显示屏、显示屏制作方法及电子设备 |
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