CN105866874B - 偏光片及具有该偏光片的显示设备 - Google Patents
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Abstract
本发明公开一种偏光片及具有该偏光片的显示设备。所述偏光片包括透明基底、设置于所述透明基底上的线性偏振片及设置于所述透明基底上的光学延迟片,所述线性偏振片包括覆盖在所述透明基底上的第一介质层及设置在所述第一介质层上的金属层,所述光学延迟片包括设置在所述透明基底上的第二介质层,以解决偏光片面临的机械、光学与寿命等问题,同时解决所述偏振片与所述延迟片需要分别制备贴附所造成的透明基底厚度增加的问题。
Description
技术领域
本发明涉及显示技术领域,特别是涉及一种偏光片及具有该偏光片的显示设备。
背景技术
偏光片是显示器件中一种重要的光阀装置,通过光的偏振态的控制可以有效地限定特定偏振光的通过与否。目前传统的偏光片主要基于有机材料制备而成,具有工艺成熟、大面积制备和均匀性较好等优点,但是有机材料面临着机械与光学性能不稳定的问题,随着外界环境(如温度、湿度、空气成分)的变化以及使用时间的延长而逐渐偏离理想态,出现均匀性变差、机械形变、光学透过率改变或者色度差异等问题。另一方面,偏振极化率与透过率是一对矛盾体,良好的光学透过率需要降低薄膜的厚度,而厚度降低又会导致偏振极化率的降低,目前光学薄膜的厚度普遍在100μm左右,已经成为制约显示器薄化的一个重要因素。此外光学延迟片(包括四分之一玻片和二分之一玻片)也是显示器件中常用的薄膜结构,通常与偏振片结合使用,两者相加更是增加了模组的厚度。
发明内容
本发明主要解决的技术问题是提供一种偏光片及具有该偏光片的显示设备,以解决偏光片面临的机械、光学与寿命等问题,同时解决偏振片与延迟片需要分别制备贴附所造成的透明基底厚度增加的问题。
为解决上述技术问题,本发明采用的一个技术方案是:提供一种偏光片,所述偏光片包括透明基底、设置于所述透明基底上的线性偏振片及设置于所述透明基底上的光学延迟片,所述线性偏振片包括覆盖在所述透明基底上的第一介质层及设置在所述第一介质层上的金属层,所述光学延迟片包括设置在所述透明基底上的第二介质层。
其中,所述线性偏振片与所述光学延迟片设置在所述透明基底的同侧或不同侧。
其中,在所述线性偏振片中,所述金属层为周期性排布的条状金属线,所述金属线的周期为20-500nm,占空比为0.1-0.9,所述金属线的高度为10-500nm。
其中,在所述线性偏振片中,所述金属线的材料为Al、Ag和Au中的一者或两者以上的复合材料,所述介质层的材料为SiO2、SiO、MgO、Si3N4、TiO2和Ta2O5中的一者或两者以上的复合材料。
其中,在所述光学延迟片中,所述第二介质层为周期性排布的条状介质线,所述介质线的周期小于入射光波长的二分之一。
其中,在所述光学延迟片中,所述介质线的周期为100-700nm,占空比为0.1-0.9,所述介质线的高度为0.1-10μm。
其中,在所述光学延迟片中,所述介质线的材料为PMMA、SiO2、SiO、MgO、Si3N4、TiO2和Ta2O5中的一者或两者以上的复合材料。
其中,所述光学延迟片设置为四分之一玻片或二分之一玻片。
其中,所述金属线与所述介质线的条状分布方向为平行排列、垂直排列或倾斜排列。
为解决上述技术问题,本发明采用的另一个技术方案是:提供一种显示设备,所述显示设备包括上述任意一项所述的偏光片。
本发明的有益效果是:区别于现有技术的情况,本发明的所述偏光片通过将所述偏振片与所述光学延迟片设置在相同的透明基底上,以解决偏光片面临的机械、光学与寿命等问题,同时解决所述偏振片与所述延迟片需要分别制备贴附所造成的透明基底厚度增加的问题。
附图说明
图1是本发明的偏振片的结构示意图;
图2是本发明的延迟片的结构示意图;
图3是本发明的偏光片的第一实施例的结构示意图;
图4是本发明的偏光片的第二实施例的结构示意图;
图5是本发明的显示设备的第一实施例的结构示意图;
图6是本发明的显示设备的第二实施例的结构示意图。
具体实施方式
请参阅图1至图3,本发明的偏光片的第一实施例的结构示意图如图3所示,所述偏光片包括透明基底11、设置于所述透明基底11上的线性偏振片12及设置于所述透明基底11上的光学延迟片13。如图1所示,所述线性偏振片12包括覆盖在所述透明基底11上的第一介质层121及设置在所述第一介质层121上的金属层,所述金属层为周期性排布的条状金属线122。如图2所示,所述光学延迟片13包括设置在所述透明基底11上的第二介质层,所述第二介质层为周期性排布的条状介质线131。
在本实施例中,所述线性偏振片12与所述光学延迟片13设置在所述透明基底11的同侧。如所述透明基底11包括上表面及下表面,所述线性偏振片12与所述光学延迟片13同时设置在所述透明基底11的上表面上,或者所述线性偏振片12与所述光学延迟片13同时设置在所述透明基底11的下表面上。
如图4所示,所述偏光片的第二实施例与所述偏光片的第一实施例的区别之处在于:所述线性偏振片12与所述光学延迟片13设置在所述透明基底11的不同侧。如所述透明基底11包括上表面及下表面,所述线性偏振片12与所述光学延迟片13分别设置在所述透明基底11的上表面上及下表面上,即所述线性偏振片12设置在所述透明基底11的上表面上且所述光学延迟片13设置在所述透明基底11的下表面上,或者所述线性偏振片12设置在所述透明基底11的下表面上且所述光学延迟片13设置在所述透明基底11的上表面上。
在所述线性偏振片12中,所述金属线122在所述第一介质层121上的周期性排布,能够显著地透过偏振方向垂直于条状金属线122的TM偏振光而反射偏振方向平行于条状金属线122的TE偏振光,所述金属线122的周期为20-500nm,周期即所述金属线122的线宽加上所述金属线122之间的距离,占空比为0.1-0.9,所述金属线122的高度为10-500nm。
在所述线性偏振片12中,所述金属线122为具有较大折射率虚部的材料,所述金属线122的材料为Al、Ag和Au中的一者或两者以上的复合材料,所述第一介质层121的材料为SiO2(二氧化硅)、SiO(氧化硅)、MgO(氧化镁)、Si3N4(氮化硅)、TiO2(二氧化钛)和Ta2O5(五氧化二钽)中的一者或两者以上的复合材料。
在所述光学延迟片13中,所述介质线131在所述透明基底11上周期性排布,当所述介质线131的周期小于入射光波长的二分之一时,其所支持的Bloch波TM与TE态呈现不同的折射率,也即双折射现象,所述折射率差通常为0.01-0.2左右。
在所述光学延迟片13中,所述介质线131的周期为100-700nm,周期即所述介质线131的线宽加上所述介质线131之间的距离,占空比为0.1-0.9,所述介质线131的高度为0.1-10μm。
在所述光学延迟片13中,所述介质线131的材料为PMMA(polymethylmethacrylate,聚甲基丙烯酸甲酯)、SiO2、SiO、MgO、Si3N4、TiO2和Ta2O5中的一者或两者以上的复合材料。
所述光学延迟片13根据所述折射率差及厚度可以设定为四分之一玻片或者二分之一玻片。
所述金属线122与所述介质线131的条状分布方向为平行排列、垂直排列或倾斜排列,具体需要依据所述偏振片12与所述光学延迟片13的放置角度设定。
所述金属线122与介质线131的制备流程与工艺精度基本兼容,因而可以采用相同的制备工艺,如纳米压印等。
所述透明基底11的材料为玻璃、PET(Polyethylene terephthalate,聚对苯二甲酸乙二醇酯)和PEC(Polyethylene-Chlorinated,氯化聚乙烯)中的一者或两者以上的复合材料。
图5为本发明显示设备的第一实施例的结构示意图。所述显示设备为OLED显示设备,包括所述偏光片、OLED发光层14及反射层15,所述偏光片可为上述偏光片实施例中的任意一种。
图6为本发明显示设备的第二实施例的结构示意图。所述显示设备为反射式显示设备,包括所述偏光片、液晶层16及反射层17,所述偏光片可为上述偏光片实施例中的任意一种。
所述偏光片通过将所述偏振片与所述光学延迟片设置在相同的透明基底上,以解决偏光片面临的机械、光学与寿命等问题,同时解决所述偏振片与所述延迟片需要分别制备贴附所造成的透明基底厚度增加的问题。
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 (9)
1.一种偏光片,其特征在于,所述偏光片包括透明基底、设置于所述透明基底上的线性偏振片及设置于所述透明基底上的光学延迟片,所述线性偏振片包括覆盖在所述透明基底上的第一介质层及设置在所述第一介质层上的金属层,所述光学延迟片包括设置在所述透明基底上的第二介质层;
在所述光学延迟片中,所述第二介质层为周期性排布的条状介质线,所述介质线的周期小于入射光波长的二分之一;
在所述线性偏振片中,所述金属层为周期性排布的条状金属线。
2.根据权利要求1所述的偏光片,其特征在于,所述线性偏振片与所述光学延迟片设置在所述透明基底的同侧或不同侧。
3.根据权利要求1所述的偏光片,其特征在于,所述金属线的周期为20-500nm,占空比为0.1-0.9,所述金属线的高度为10-500nm。
4.根据权利要求1所述的偏光片,其特征在于,在所述线性偏振片中,所述金属线的材料为Al、Ag和Au中的一者或两者以上的复合材料,所述介质层的材料为SiO2、SiO、MgO、Si3N4、TiO2和Ta2O5中的一者或两者以上的复合材料。
5.根据权利要求1所述的偏光片,其特征在于,在所述光学延迟片中,所述介质线的周期为100-700nm,占空比为0.1-0.9,所述介质线的高度为0.1-10μm。
6.根据权利要求1所述的偏光片,其特征在于,在所述光学延迟片中,所述介质线的材料为PMMA、SiO2、SiO、MgO、Si3N4、TiO2和Ta2O5中的一者或两者以上的复合材料。
7.根据权利要求1所述的偏光片,其特征在于,所述光学延迟片设置为四分之一玻片或二分之一玻片。
8.根据权利要求1所述的偏光片,其特征在于,所述金属线与所述介质线的条状分布方向为平行排列、垂直排列或倾斜排列。
9.一种显示设备,其特征在于,所述显示设备包括如权利要求1-8任意一项所述的偏光片。
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