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CN102981311B - 显示面板及显示装置 - Google Patents

显示面板及显示装置 Download PDF

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CN102981311B
CN102981311B CN201210526435.0A CN201210526435A CN102981311B CN 102981311 B CN102981311 B CN 102981311B CN 201210526435 A CN201210526435 A CN 201210526435A CN 102981311 B CN102981311 B CN 102981311B
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liquid crystal
layer
display panel
compensation
upper substrate
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CN102981311A (zh
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铃木照晃
杨亚锋
金起满
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BOE Technology Group Co Ltd
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Priority to EP13194998.4A priority patent/EP2741131B1/en
Priority to US14/098,917 priority patent/US20140218669A1/en
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    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/13363Birefringent elements, e.g. for optical compensation
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/13356Structural association of cells with optical devices, e.g. polarisers or reflectors characterised by the placement of the optical elements
    • G02F1/133565Structural association of cells with optical devices, e.g. polarisers or reflectors characterised by the placement of the optical elements inside the LC elements, i.e. between the cell substrates
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1337Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133738Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers for homogeneous alignment
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F2413/00Indexing scheme related to G02F1/13363, i.e. to birefringent elements, e.g. for optical compensation, characterised by the number, position, orientation or value of the compensation plates
    • G02F2413/01Number of plates being 1
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F2413/00Indexing scheme related to G02F1/13363, i.e. to birefringent elements, e.g. for optical compensation, characterised by the number, position, orientation or value of the compensation plates
    • G02F2413/08Indexing scheme related to G02F1/13363, i.e. to birefringent elements, e.g. for optical compensation, characterised by the number, position, orientation or value of the compensation plates with a particular optical axis orientation

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)
  • Polarising Elements (AREA)

Abstract

本发明提供了一种显示面板及显示装置,涉及液晶显示技术领域。该显示面板包括下基板、上基板以及所述上基板和下基板之间的液晶层,所述下基板的入光侧设置有下偏振片,所述上基板的出光侧设置有上偏振片,该显示面板还包括:补偿层,设置在所述上基板与所述液晶层之间,所述补偿层将自所述上基板出射的光的偏振方向转变为与自所述下基板入射之前的偏振方向相同。本发明的显示面板及显示装置通过在液晶盒内设置补偿层,将穿过上基板的光的偏振方向转变为与入射下基板之前的偏振方向相同,进而能够防止因玻璃基板的变形所导致的暗态漏光现象及显示的不均性。

Description

显示面板及显示装置
技术领域
本发明涉及液晶显示技术领域,尤其涉及一种显示面板及显示装置。
背景技术
LCD(LiquidCrystalDisplay,液晶显示)装置具有重量轻、厚度薄、功耗低和辐射小等优点,己被广泛用于信息技术、多媒体技术等领域,并逐渐成为各种显示装置的主流。随着显示技术的发展,高透过率、大尺寸、低功耗、低成本的液晶显示器成为未来发展的方向。
LCD显示面板的结构如图1所示,包括下玻璃基板1、上玻璃基板2以及二者之间填充的液晶层3。下基板1和/或上基板2上形成有透明电极层。下基板1的入光侧设置有下偏振片4,上基板2的出光侧设置有上偏振片5,如图1中的实线箭头所示,下偏振片4和上偏振片5的吸收轴正交(分别为0度和90度)。在没有施加电场时,光线自下偏光片4入射而产生线性偏振光,其偏光方向依液晶分子旋转其行进方向,然后自上偏光片5射出,此时,显示面板显示出白色底色;当施加电场时,液晶分子的排列变化,线性偏振光维持原方向通过液晶层3,并上偏振片5吸收,无法穿透,因而,显示面板显示黑色。
LCD的显示品质与所得亮暗程度的高低具有直接的关系,为了得到高的对比度,理论上必须得到亮度较低的全黑状态,但实际上,如图2所示,上下玻璃的扭曲变形将会导致透过该玻璃基板的偏振光的延迟量发生变化,从而引起LCD的暗态不均匀性。当线性偏振光从上玻璃基板2穿过后,其偏振态与自下玻璃基板1入射之前不同,因此,不会完全被上偏振片5吸收,一部分光会透射出去,如图中虚线箭头所示,造成暗态的漏光现象,导致了显示的不均匀性。
发明内容
(一)要解决的技术问题
本发明所要解决的技术问题是:能够避免因玻璃基板的变形所引起的暗态漏光现象及显示的不均匀性的显示面板及显示装置。
(二)技术方案
为解决上述问题,本发明提供了一种显示面板,包括下基板、上基板以及所述上基板和下基板之间的液晶层,所述下基板的入光侧设置有下偏振片,所述上基板的出光侧设置有上偏振片,该显示面板还包括:补偿层,设置在所述上基板与所述液晶层之间,所述补偿层将自所述上基板出射的光的偏振方向转变为与自所述下基板入射之前的偏振方向相同。
优选地,所述液晶层的液晶分子的长轴方向与所述上偏振片或所述下偏振片的吸收轴方向相同。
优选地,所述补偿层的延迟量与所述液晶层的延迟量相同,且所述补偿层的慢轴与所述液晶层的液晶分子的长轴正交。
优选地,所述补偿层的吸收轴的方向与所述液晶层的液晶分子长轴的方向相同,所述补偿层的延迟量与所述液晶分子的延迟量的和等于所述显示面板的入射光的主波长。
优选地,所述主波长为550nm。
优选地,所述显示面板还包括:透明电极层,设置在所述下基板的出光侧和/或所述上基板的入光侧。
优选地,所述补偿层由环烯烃聚合物类、聚碳酸酯类或聚苯乙烯类高分子材料或液晶性高分子材料构成。
本发明还提供一种显示装置,包括上述的显示面板。
(三)有益效果
本发明的显示面板及显示装置通过在液晶盒内设置补偿层,将穿过上基板的光的偏振方向转变为与入射下基板之前的偏振方向相同,进而能够防止因玻璃基板的变形所导致的暗态漏光现象及显示的不均性。同时,本发明在不改变玻璃基板变形性质的情况下,能将由于玻璃基板变形导致的漏光降到最低。
附图说明
图1为LCD显示面板的结构示意图;
图2为位图1的显示面板由于玻璃变形而产生漏光现象的原理示意图;
图3为实施例1的显示面板的结构示意图;
图4为实施例1的显示面板的暗态原理示意图;
图5为实施例2的显示面板的暗态原理示意图。
具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例是本发明的一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动的前提下所获得的所有其他实施例,都属于本发明保护的范围。
如图3所示,本发明的显示面板包括下基板1、上基板2以及上基板1和下基板2之间的液晶层3,下基板1的入光侧设置有下偏振片4,上基板2的出光侧设置有上偏振片5,且上偏振片5与下偏振片4的吸收轴正交,下基板1的出光侧和/或上基板2的入光侧还可设置透明电极层(未示出),该显示面板还包括:补偿层6,设置在上基板2与液晶层3之间,补偿层6将自上基板2出射的光的偏振方向转变为与自下基板1入射之前的偏振方向相同,从而有效地抑制漏光。优选地,补偿层6可由环烯烃聚合物COP类、聚碳酸酯PC类或聚苯乙烯PS类等高分子材料或液晶性高分子材料构成。
下面通过具体实施例来进一步说明本发明。
实施例1
如图4所示,在本实施例的显示面板中,实线箭头所示的液晶层3的液晶分子的长轴的方向与上偏振片5的吸收轴的方向相同(或者可为与下偏振片4的吸收轴的方向相同),补偿层6的延迟量与液晶层2的延迟量相同,且补偿层6的慢轴与液晶层3的液晶分子的长轴正交,从而实现将穿过上基板2的光的偏振方向转变回与入射下基板1之前的偏振方向相同,使得虚线箭头所示的入射光能够完全被上偏振片5所吸收,不会产生漏光现象。
实施例2
如图5所示,在本实施例的显示面板中,实线箭头所示的液晶层3的液晶分子的长轴方向仍与上偏振片5的吸收轴的方向相同,补偿层6的慢轴的方向与液晶层3的液晶分子长轴的方向相同,与实施例1中所不透光的是,补偿层6的延迟量与液晶分子的延迟量的和等于显示面板的入射光的主波长,例如550nm,从而可实现将穿过上基板2的光的偏振方向转变回与入射下基板1之前的偏振方向相同,使得虚线箭头所示的入射光能够完全被上偏振片5所吸收,不会产生漏光现象。
此外,本发明还提供了一种包括上述显示面板的显示装置,包括透明电极层分别设置在下基板的出光侧和下基板的入光侧的显示装置,或者透明电极层仅设置在下基板的出光侧的高级超维场转换技术(ADvancedSuperDimensionSwitch,ADS)型显示装置,且对于本领域所熟知的显示装置的其他组成部分,在此不做赘述,也不应作为对本发明技术方案的限制。
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 (6)

1.一种显示面板,包括下基板、上基板以及所述上基板和下基板之间的液晶层,所述下基板的入光侧设置有下偏振片,所述上基板的出光侧设置有上偏振片,其特征在于,该显示面板还包括:补偿层,设置在所述上基板与所述液晶层之间,所述补偿层将自所述上基板出射的光的偏振方向转变为与自所述下基板入射之前的偏振方向相同;
其中,所述液晶层的液晶分子的长轴方向与所述上偏振片或所述下偏振片的吸收轴方向相同;
所述显示面板还包括:透明电极层,设置在所述下基板的出光侧和/或所述上基板的入光侧。
2.如权利要求1所述的显示面板,其特征在于,所述补偿层的延迟量与所述液晶层的延迟量相同,且所述补偿层的慢轴与所述液晶层的液晶分子的长轴正交。
3.如权利要求1所述的显示面板,其特征在于,所述补偿层的慢轴的方向与所述液晶层的液晶分子长轴的方向相同,所述补偿层的延迟量与所述液晶分子的延迟量的和等于所述显示面板的入射光的主波长。
4.如权利要求3所述的显示面板,其特征在于,所述主波长为550nm。
5.如权利要求1-4任一项所述的显示面板,其特征在于,所述补偿层由环烯烃聚合物类、聚碳酸酯类或聚苯乙烯类高分子材料或液晶性高分子材料构成。
6.一种显示装置,其特征在于,包括权利要求1-5任一项所述的显示面板。
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EP13194998.4A EP2741131B1 (en) 2012-12-07 2013-11-29 Display panel and display device
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CN110095899A (zh) * 2019-05-29 2019-08-06 京东方科技集团股份有限公司 显示面板及其驱动方法、显示模组、显示装置

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