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CN109507824B - 显示装置 - Google Patents

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CN109507824B
CN109507824B CN201811037512.XA CN201811037512A CN109507824B CN 109507824 B CN109507824 B CN 109507824B CN 201811037512 A CN201811037512 A CN 201811037512A CN 109507824 B CN109507824 B CN 109507824B
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light
display surface
display
pixel electrode
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CN109507824A (zh
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榎本弘美
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Sharp Corp
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    • GPHYSICS
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    • 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
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    • 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
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Abstract

本发明提供一种能降低耗电的显示装置。该显示装置的特征在于具有液晶面板11及蓄光部42,该液晶面板11具有:显示面31;液晶层14,能转换光的透过形态;反射像素电极32,相对于液晶层14配置在显示面31的相反侧而将从显示面31侧入射的光向显示面31侧反射;开口部33,相对于液晶层14配置在显示面31的相反侧而使光透过;及彩色滤光器20,相对于反射像素电极32及开口部33而配置在显示面31侧;该蓄光部42通过积蓄光而发出成为彩色滤光器20所呈现出的颜色的补色的光,且相对于开口部33配置在显示面31的相反侧。

Description

显示装置
技术领域
本发明涉及一种显示装置。
背景技术
作为现有的半透过型显示装置的一例,已知有下述专利文献1中记载的装置。专利文献1中记载的显示装置中,针对各像素设有反射电极,能利用该反射电极来进行反射显示,并且能利用反射电极的像素间的空间进行透过显示。
现有技术文献
[专利文献]
[专利文献1]
特开2012-255908号公报
发明内容
本发明所要解决的技术问题
所述专利文献1中,构成为利用设在显示面板的背面侧的背光源进行透过显示,因此需要电力来驱动背光源。因此,需要能进一步降低耗电的显示装置。
本发明是鉴于所述情况而完成,其目的在于提供一种能降低耗电的显示装置。
解决问题的手段
为了解决所述问题,本发明的显示装置的特征在于,具有显示面板及蓄光部,显示面板包括:显示面;光透过形态转换部,能转换光的透过形态;光反射部,相对于所述光透过形态转换部配置在所述显示面的相反侧而将从所述显示面侧入射的光向所述显示面侧反射;光透过部,相对于所述光透过形态转换部配置在所述显示面的相反侧而使光透过;及彩色滤光器,相对于所述光反射部及所述光透过部配置在所述显示面侧;蓄光部通过积蓄光而发出成为所述彩色滤光器呈现出的颜色的补色的光,且相对于所述光透过部配置在所述显示面的相反侧。
通过具有光反射部,能利用外部光进行显示,通过具有光透过部及蓄光部,能利用来自蓄光部的光进行显示。通过具有蓄光部,与使用背光源相比能降低耗电。而且,光反射部的反射光有时会因光反射部的材质或外部光的颜色等而带有特有的颜色。通过具有彩色滤光器,能调整反射光的颜色,从而进一步提高显示水平。而且,蓄光部发出成为彩色滤光器的补色的光,因此,能抑制利用来自蓄光部的光进行显示时的显示色受到彩色滤光器的影响。
发明效果
根据本发明,可提供一种能降低耗电的显示装置。
附图说明
图1是表示本发明的实施方式一中的液晶显示装置的剖视图。
图2是表示液晶面板所具有的多个像素部的平面图。
图3是表示实施方式二中的液晶显示装置的剖视图。
图4是表示实施方式三中的液晶显示装置的剖视图。
图5是表示实施方式四中的液晶显示装置的剖视图。
图6是表示实施方式五中的液晶显示装置的剖视图。
具体实施方式
<实施方式一>
根据图1至图2说明本发明的实施方式一。如图1所示,液晶显示装置10具有半透过型液晶面板11(显示面板)、及对液晶面板11照射光的蓄光片40。液晶面板11是半透过型的,其可进行两种显示,即,将从其显示面31侧(表侧,图1的上侧)照射的外部光(周围光、环境光)反射而用于显示的反射显示,及使从配设在显示面31侧的相反侧(背侧,图1的下侧)的蓄光片40照射的光透过而用于显示的透过显示。反射显示中所利用的外部光中包含太阳光、室内灯光等。本实施方式中的液晶显示装置10可用于例如智能手表等可佩带终端,但用途并不限于此。
如图1所示,液晶面板11具有彼此成为对置状的表背一对基板12、13、及介于两基板12、13间且含有随着施加电场而能转换光的透过形态的物质即液晶分子的液晶层14(光透过形态转换部)。两基板12、13中的配设于表侧的基板12作为对置基板12(CF基板、共用基板),配设于背侧的基板13作为阵列基板13(元件基板、有源矩阵基板、TFT基板)。液晶层14由介于两基板12、13的外周端部间的密封部(未图示)密封。
液晶面板11中,显示面31的中央侧部分成为显示图像的显示区域,相对于此,包围显示区域的外框状的外周侧部分成为不显示图像的非显示区域。在其中的非显示区域配置所述密封部等,而在显示区域配置用于显示图像的像素部16等。两基板12、13分别具有大致透明的玻璃基板,且构成为,各个玻璃基板上通过已知的光刻法等层叠多个膜。该液晶面板11在显示区域进行单色显示,且例如在未通电时(后述的不对像素部16施加电压时),为灰度值(透过率)最小且成为黑显示的常黑模式。
各像素部16连接于设在阵列基板13上的TFT等转换元件(未图示)或存储电路(静态RAM等,未图示),利用这些转换元件的驱动及存储电路中储存的数据,使各像素部16充电到规定的电位且在一定期间内保持该电位。即,液晶面板11是存储液晶面板,能在显示静态图像时降低耗电。
如图1及图2所示,阵列基板13的显示区域中,多个像素部16以矩阵状平面配置在显示面31的面内。像素部16具有:相对地配设在下层侧(液晶层14侧的相反侧)的透过像素电极17、及相对地配设在上层侧(液晶层14侧)且与透过像素电极17重叠的反射像素电极32。透过像素电极17是由具有光透过性的透明电极膜构成。
反射像素电极32(光反射部)是由具有光反射性的金属材料构成,且相对于液晶层14而配设在显示面31的相反侧。反射像素电极32能将从显示面31侧入射的光(外部光)反射到显示面31侧。反射像素电极32的反射光(参照图1的箭头线L1)经过液晶层14再次射向对置基板12侧,用于反射显示。在反射像素电极32,局部地贯穿形成开口部33(光透过部)。从蓄光片40的蓄光部42出射的光(参照图1的箭头线L2)能穿透透过像素电极17及开口部33后射向液晶层14侧。由此,从蓄光片40出射的光经过液晶层14而射向对置基板12侧,用于透过显示。另外,如图2所示,开口部33例如呈方形,其面积设定为小于反射像素电极32的除开口部33以外的部分的面积的值。而且,在阵列基板13中,在透过像素电极17的下层侧设有平坦化膜15。平坦化膜15是用于平坦化由于配设在其更下层侧且连接于像素部16的配线或TFT等(图示省略)而产生的凹凸,其主要由有机绝缘材料构成,且其平坦化的表面成为像素部16的形成面。
如图1所示,在对置基板12设有遮蔽光的遮光部19、彩色滤光器20、及与像素部16成对置状的对置电极21。如图2的平面视图所示,遮光部19成为格子状,其将以矩阵状平面配置在显示区域的多个像素部16之间分隔。遮光部19能遮挡在相邻的像素部16之间穿梭的光,因此能确保各像素部16的显示独立性。彩色滤光器20相对于反射像素电极32(开口部33)配设在显示面31侧,呈现出蓝色。具体而言,彩色滤光器20含有例如选择性地使属于蓝色的波长区域(约420nm~约500nm)的蓝色光透过、而吸收除此以外的波长区域的光(绿色光或红色光)的颜料或染料。
而且,在能同时实现反射显示及透过显示的液晶面板中,有反射显示时的显示色比透过显示时的显示色容易带有黄颜色的倾向。作为其理由,可列举因反射像素电极的材质而使反射像素电极的反射光容易带有黄颜色。而且,反射显示中,因外部光往返于液晶层,所以通过液晶层的光路长度为透过显示的2倍。若光路长度变长,则有长波长的光的光量大于短波长的光的光量的倾向。这也是反射显示中的显示色容易带有黄颜色的理由之一。
如上所述,若将呈蓝色的彩色滤光器20设于对置基板12,则反射显示时的显示色难以带有黄颜色,其中蓝色为黄色的补色。彩色滤光器20是以覆盖配设于显示区域的多个像素部16的方式配置。对置电极21与透过像素电极17同样由透明电极膜构成,通常施加固定的标准电位(共通电位)。因此,在与对置电极21成对置状的各像素部16之间,根据供给到各像素部16的电压而产生电位差,利用该电位差而控制各像素部16附近存在的液晶层14内所含的液晶材料的配向状态,从而该像素部16进行显示。对置电极21以与所有多个像素部16成对置状的方式配设。而且,液晶面板11上,在对置基板12的表侧配设有偏光板22,在阵列基板13的背侧配设有偏光板23。另外,作为反射光容易带有黄颜色的反射像素电极32的材质,可列举由ITO、钼、铝组合而成的物质、由ITO与银合金组合而成的物质等,但并不限于此。
蓄光片40相对于像素部16(进而是开口部33)而配设在显示面31的相反侧,具有板状的基材41及包含在基材41中的蓄光部42。蓄光部42构成为通过积蓄光而发出彩色滤光器20所呈现的蓝色的补色即黄色光。各蓄光部42构成为,从显示面31侧的相反侧相对于各像素部16的各开口部33而重叠。另外,作为发出黄色的蓄光部42,可使用例如使碱土类铝酸盐系的蓄光材附着黄色颜料而成的蓄光颜料,但并不限于此。另外,作为此种蓄光颜料,可列举例如LUMINOUS株式会社制造的“蓄光颜料301Y(Mo·xAl2O3:ySiO2Eu)”。而且,作为蓄光部42,也可构成为,通过将蓄光材料与接收来自该蓄光材料的光而发光的荧光材料组合而发出黄色光。
接着,说明本实施方式的效果。本实施方式中,通过具有反射像素电极32,能利用外部光进行显示,通过具有开口部33及蓄光部42,能利用来自蓄光部42的光进行显示。通过具有蓄光部42,与使用背光源相比能降低耗电。而且,反射像素电极32的反射光有时会因反射像素电极32的材质或外部光的颜色等而带有特有的颜色。通过具有彩色滤光器20,能调整反射光的颜色,从而进一步提高显示水平。而且,蓄光部42发出成为彩色滤光器20的补色的光,因此能抑制当利用来自蓄光部42的光进行显示时显示色受到彩色滤光器20的影响。
而且,液晶面板11具有多个像素部16,像素部16包含具有光透过性的透过像素电极17、及与透过像素电极17重叠且具有光反射性的反射像素电极32。来自蓄光部42的光穿透透过像素电极17及光透过部(开口部33)后射向显示面31侧。由此,能利用来自蓄光部42的光进行显示。
而且,反射像素电极32是由金属材料构成,彩色滤光器20呈现出蓝色,蓄光部42构成为通过积蓄光而发出黄色光。当反射像素电极32为金属材料时,其反射光有时会带有金属特有的黄颜色。通过将彩色滤光器20设为蓝色,从而当使用反射光进行显示时显示色不易带有黄颜色。而且,蓄光部42会发出成为彩色滤光器20的补色的黄色光,所以,能抑制当使用来自蓄光部42的光进行显示时显示色受到彩色滤光器20的影响而带有蓝颜色。结果,在反射显示及透过显示中,能够更接近显示的白度。
而且,蓄光部42构成为,从显示面31侧的相反侧相对于开口部33而重叠。来自蓄光部42的光容易透过开口部33,从而能进一步提高光的利用效率。
<实施方式二>
接着,利用图3说明本发明的实施方式二。对于与所述实施方式相同的部分标注相同符号,并省略重复说明。本实施方式的液晶显示装置110中,蓄光片140的整个面上含有蓄光部142。
<实施方式三>
接着,利用图4说明本发明的实施方式三。对于与所述实施方式相同的部分标注相同附图标记,并省略重复说明。本实施方式的液晶显示装置210中未设置蓄光片,各蓄光部42是以与各开口部33重叠的方式而设。
<实施方式四>
接着,利用图5说明本发明的实施方式四。对于与所述实施方式相同的部分标注相同附图标记,并省略重复说明。本实施方式的液晶显示装置310中,未设置蓄光片,在相对于液晶面板11而配设在显示面31侧的相反侧的偏光板23上设有蓄光部42,各蓄光部42是以与各开口部33重叠的方式而设。通过使偏光板23与蓄光部42一体化,组装的作业性变得良好。
<实施方式五>
接着,利用图6说明本发明的实施方式五。对于与所述实施方式相同的部分标注相同附图标记,并省略重复说明。本实施方式的液晶显示装置410中,在显示面31侧的相反侧未设置偏光板,蓄光部42设于阵列基板13的背侧的面。
<其他实施方式>
本发明并不限于所述描述及附图所说明的实施方式,例如下文的实施方式也属于本发明的技术范围。
(1)所述实施方式中,将形成于反射像素电极的开口部33设为光透过部,但并不限于此。例如,也可将相邻的反射像素电极间的间隙设为光透过部。
(2)所述实施方式中,作为光透过形态转换部,例示出液晶层14,但并不限于此。光透过形态转换部只要能通过转换光的透过形态而在显示面上显示图像即可。例如,作为光透过形态转换部,可列举各像素部具有微小的机械式快门的结构(MEMS)。
(3)所述实施方式中,例示出彩色滤光器20呈现蓝色、蓄光部42发出黄色光的结构,但并不限于此。彩色滤光器20的颜色可根据反射像素电极32的反射光的颜色而适当变更,蓄光部42发出的光的颜色只要是彩色滤光器20呈现出的颜色的补色即可。例如,当彩色滤光器20为红色时,蓄光部42只要为发出蓝绿色(cyan)光的结构即可,当彩色滤光器20为绿色时,蓄光部42只要为发出品红色(magenta)光的结构即可。而且,也可更换上文所述的彩色滤光器20的颜色与蓄光部42的发光色的组合。例如,当彩色滤光器20为黄色时,蓄光部42只要为发出蓝色光的结构即可,当彩色滤光器20为蓝绿色(cyan)时,蓄光部42只要为发出红色光的结构即可,当彩色滤光器20为品红色(magenta)时,蓄光部42只要为发出绿色光的结构即可。
符号说明
10、110、210、310、410 液晶显示装置(显示装置)
11 液晶面板(显示面板)
14 液晶层(光透过形态转换部)
16 像素部
17 透过像素电极
20 彩色滤光器
23 偏光板
31 显示面
32 反射像素电极(光反射部)
33 开口部(光透过部)
42 蓄光部
140 蓄光片(蓄光部)

Claims (6)

1.一种显示装置,其特征在于,具有:
显示面板,其包括:显示面;光透过形态转换部,能转换光的透过形态;光反射部,相对于所述光透过形态转换部配置在所述显示面的相反侧且将从所述显示面侧入射的光向所述显示面侧反射;光透过部,相对于所述光透过形态转换部配置在所述显示面的相反侧且使光透过;及彩色滤光器,相对于所述光反射部及所述光透过部配置在所述显示面侧;以及
蓄光部,通过积蓄光而发出成为所述彩色滤光器呈现出的颜色的补色的光,且相对于所述光透过部配置在所述显示面的相反侧,
在所述显示面板具备的显示区域,所述显示区域具有多个像素部,
所述像素部包含具有光透过性的透过像素电极、及与所述透过像素电极重叠且具有光反射性的反射像素电极;
所述光反射部是所述反射像素电极,
所述光透过部是形成于所述反射像素电极的开口部,
所述光反射部是由金属材料构成,
所述彩色滤光器覆盖所述显示区域并呈现出蓝色,
所述蓄光部构成为通过积蓄光发出黄色光。
2.一种显示装置,其特征在于,具有:
显示面板,其包括:显示面;光透过形态转换部,能转换光的透过形态;光反射部,相对于所述光透过形态转换部配置在所述显示面的相反侧且将从所述显示面侧入射的光向所述显示面侧反射;光透过部,相对于所述光透过形态转换部配置在所述显示面的相反侧且使光透过;及彩色滤光器,相对于所述光反射部及所述光透过部配置在所述显示面侧;以及
蓄光部,通过积蓄光而发出成为所述彩色滤光器呈现出的颜色的补色的光,且相对于所述光透过部配置在所述显示面的相反侧,
所述蓄光部包含碱土类铝酸盐系的蓄光材。
3.根据权利要求2所述的显示装置,其特征在于,
所述显示面板具有多个像素部,
所述像素部包含具有光透过性的透过像素电极、及与所述透过像素电极重叠且具有光反射性的反射像素电极;
所述光反射部是所述反射像素电极,
所述光透过部是形成于所述反射像素电极的开口部。
4.根据权利要求2或3所述的显示装置,其特征在于,
所述光反射部是由金属材料构成,
所述彩色滤光器呈现出蓝色,
所述蓄光部构成为通过积蓄光而发出黄色光。
5.根据权利要求1或2所述的显示装置,其特征在于,
所述蓄光部构成为从所述显示面侧的相反侧相对于所述光透过部而重叠。
6.根据权利要求1或2所述的显示装置,其特征在于,
具有相对于所述显示面板配设在所述显示面侧的相反侧的偏光板,
所述蓄光部设于所述偏光板。
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CN104199213A (zh) * 2014-08-18 2014-12-10 京东方科技集团股份有限公司 一种半透半反式液晶显示面板及液晶显示器
WO2017145939A1 (ja) * 2016-02-24 2017-08-31 シャープ株式会社 薄膜トランジスタ基板及び表示パネル
CN105929589A (zh) * 2016-07-08 2016-09-07 武汉华星光电技术有限公司 彩色滤光片、液晶显示面板及其色度匹配调控方法
CN106094321A (zh) * 2016-08-04 2016-11-09 武汉华星光电技术有限公司 一种液晶显示器
CN106896577A (zh) * 2017-03-27 2017-06-27 武汉华星光电技术有限公司 透反射式液晶显示器

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