CN101688986B - 柔性显示器和生产柔性显示器的方法 - Google Patents

柔性显示器和生产柔性显示器的方法 Download PDF

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CN101688986B
CN101688986B CN2008800057534A CN200880005753A CN101688986B CN 101688986 B CN101688986 B CN 101688986B CN 2008800057534 A CN2008800057534 A CN 2008800057534A CN 200880005753 A CN200880005753 A CN 200880005753A CN 101688986 B CN101688986 B CN 101688986B
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弗雷德里克斯·约翰内斯·图弗斯拉格
埃里克·范费恩恩达尔
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Abstract

本发明涉及柔性显示器(40),包括前板(42),位于底板(44)的顶部。优选地,前板(44)层合在底板(42)的顶部上。柔性显示器(40)还包括结合区(48)。根据本发明前板(44)在基本上对应于结合区(48)的区(46)上延伸。优选地,在结合区(48)中的前板提供有空间(47),用于布置实现到电子像素阵列和/或到光电元件阵列的连接的电接触。空间(47)可以是独立布置或彼此连接以在结合面加(48)上形成单独空间的任意合适的形状。

Description

柔性显示器和生产柔性显示器的方法
技术领域
本发明涉及柔性显示器,包括:
底板,包括基片和电子像素阵列;
前板,包括基片和光电元件阵列;
该前板重叠在底板上面,前板区基本上与底板区相匹配;
结合区,布置为使得能够连接到电子像素阵列和/或到光电元件阵列。
本发明还涉及制造柔性显示器的方法,包括:
提供布置有电子像素阵列的底板;
提供包括光电元件的前板,该前板区基本上与底板区相匹配;
提供结合区,使得能够连接到电子像素阵列和/或到光电元件阵列。
背景技术
从WO 2006/061786A1可知上面阐述的柔性显示器的一个实施例。已知的柔性显示器包括具有像素电极阵列和导体以驱动电子原件的底板和在其上定位有显示器的光电电池的前板的集合。电泳有源矩阵显示器(例如)可以具有有源矩阵底板和电泳前板。已知的柔性显示器还包括结合区,布置用于使得能够连接到电子像素阵列和/或光电元件阵列。
在显示区之外的剩余区,即,有源矩阵区之外的区对机械引入的损害非常敏感。由于使用的非常薄的箔的变型该损害可以从划伤到弯曲的范围。可以使用刚性元件保护剩余区。然而,在该区中要被保护的驱动器和柔性箔将必须被结合。因此,需要刚性元件相对于结合区和前板的准直。注意到,光性元件还可以被布置在底板处。
发明内容
本发明的一个目的是提供一种柔性显示器,其由于具有相对于机械压力或损害的改进的电阻而具有增加的耐久性。
为此在根据本发明的柔性显示器中前板延伸到显示区之外的底板区的区域中。
优选地,前板延伸到其中存在有电传导线的一个或多个区域中。本发明的技术手段基于需要通过将前板基片延伸到显示区之外的底板区的区域中来保护单独校准的叠层梯级的见识。优选地,前板至少延伸到结合区的区域中。
根据本发明的柔性显示器具有下列优点:
——显示区之外的底板区变硬,给出相对于强局部变形的保护而没有将显示器自身变厚,因此防止了弯曲变形;
——(几乎)所有的传导线被保护箔覆盖(防止了层的划伤);
——应用在基片上的层与中性线更近,这可减轻引起这些层故障的压力;
——不需要额外的叠层步骤;
——不需要额外的准直步骤。
在根据本发明的柔性显示器的实施例中,提供了延伸到结合区域中的前板区的空间,该结合区域在用于布置电接触并结合驱动器IC或实现所述连接的区中。优选地,底板包括有机电子薄膜晶体管并且前板包括电泳显示器。电泳显示器本身从(例如)US2007/0018944A1中已知,该文档结合于此作为参考。更优选地,前半压叠在底板上。更优选地,每个像素布置有专用薄膜晶体管。更优选地,电子像素阵列和/或光电元件阵列包括位置接近独立排列的中性线的多个层。该位置减少了引起这些层中故障的压力。
在塑料箔上处理有源矩阵电路导致可以集成到柔性显示器中的有源矩阵底板。该实施例将参照图1详细讨论。当前堆叠有利地布置有高传导的栅极层(例如金属或镀锡铟氧化物),接着是有机绝缘层,第二导电层和有机半导体层。有机层可以有利地通过本身已知的旋涂方法来沉积。这些层可以使用合适的光刻法来刻图案,例如,采用这些层的固有光敏性(例如,绝缘体层)或使用光阻(例如,对于大多数半导体和导体)。
本发明还涉及权利要求6阐述的方法。还涉及权利要求7、8和9阐述的根据本发明方法的优选实施例。
附图说明
本发明的这些和其他方面将参照附图进一步讨论。
图1表现根据本发明的柔性显示器的有源矩阵电路的实施例的示意图。
图2表现图1的有源矩阵的等价电路的实施例的示意图。
图3表现电泳胶囊的实施例的示意图。
图4表现根据本发明的柔性显示器的实施例的示意图。
具体实施方式
图1表现了根据本发明的柔性显示器的有源矩阵电路10的实施例的示意图。覆盖图A示意性描述了像素焊盘3、数据线1、数据线4和半导体2。在覆盖图A中示出的线B截取的部分B示意性描述了其顶部布置有栅极线4的基片6。通过合适的绝缘层5栅极线4与数据线1和像素焊盘3电分离。半导体2位于因此形成的结构的顶部。
在塑料箔上处理有源矩阵电路导致可以集成到柔性显示器中的AM底板。表1中示出了可用于多种层的可能材料。当前堆叠开始于高导电栅极层(例如金属或镀锡铟氧化物),接着是有机绝缘层,第二导电层和有机半导体层。有机层通过旋涂方法来沉积。该层通过光刻法来图案化,通过使用这些层的固有光敏性(例如,绝缘体层)或使用光阻(例如,对于大多数半导体和导体)。
表1用于具有聚合体电子的有源矩阵电路的材料
Figure GSB00000454875400051
*基本材料可以涂有一定数量的隔板层。
图2表现了图1的有源矩阵像素的等价电路20的实施例的示意图。有源矩阵显示器是一次一行驱动的。在一帧时间期间所有行顺序通过施加从非导电到导电状态改变TFT的电压而被选择。在操作中,在一帧时间期间所有的行通过施加从非导电到导电状态改变TFT的电压而被选择。在该线选择时间中,选择的行的像素电容器(即TFT漏极侧的总电容)被充电到施加在列电极上的电压。在剩余帧时间期间(即保持时间),其他行被处理。之后TFT处于其非导电状态并且必须保持像素电容器上的电荷。这迫切要求TFT的导通和截至电流。对于具有电泳胶囊的聚合体电子器件有源矩阵底板,典型电压是-25V的行选择电压、+25V的行非选择电压、-15V和+15V之间的列电压和2.5V的公共电极电压。这些是相对高的电压,由于高电压电泳显示器效应和聚合体电子装置必须在比无定性硅装置稍高的电压驱动的事实。使用电泳显示器作为替换LC材料的显示器效应的优点是电泳显示器是双稳态的。因此处理仅需要在图像更新期间(~1秒),同时有源矩阵在图像更新之间处于静止。如图2中所示,可以使用存储电容器。使用它可以使对TFT截至电流的需要不是太低。
图3表现了包括黑色微粒33和白色微粒的31的E墨水胶囊33的实施例30的示意图。胶囊33通过施加用于置换胶囊33中的黑色微粒33和白色微粒31的35a、35b而经受特定的外部电压。为了改变电泳E墨水显示器上的图像内容,新的图像信息在特定量的时间(500ms-1000ms)中被写入。由于有源矩阵的刷新率通常高于在一定数量的帧(50Hz的帧速率,25-50帧)期间处理相同图像内容的该结果。图3利用在白色和黑色状态中具有E墨水的照片示出了E墨水原理的示意图。胶囊D的储存约20-40微米。从黑到白处理E墨水,例如,需要像素电容器在500ms到1000ms期间被充电到-15V。在该时间期间白色微粒向顶部(公共)电极漂移,同时黑色微粒向底部(有源矩阵底板)电极漂移。切换到黑色需要正像素电压和0V像素E墨水上不切换。
由于电泳显示器效应是双稳态的,底板仅需要在图像更新期间被驱动。在图像更新之间在底板上切换的像素没有被驱动。E墨水的驱动电压相对高于标准LC效应。有源矩阵底板上的聚合体电子驱动因此必须被以相对高的电压驱动。为了电泳材料功能最佳,存在其中可以使用显示器的特定适度的窗口。该湿度窗口之外光电属性可以恶化。
图4表现了根据本发明柔性显示器的实施例的示意图。柔性显示器40包括参照图1描述的底板42。底板可以包括有机或无机薄膜晶体管。柔性显示器40还包括前板44,位于底板42的顶部。前板可以包括电子显示器。优选地,前板44层合在底板42的顶部上。柔性显示器40还包括结合区48。当前板部分被布置时,优选地是堆叠在结合区48的区域中的,总的层结构的局部厚度增加。这有一个优点是应用在底板基片上的层变得更加接近于中性线,这可以减轻引起这些层故障的压力。具体地,没有被前板覆盖的区域,如用于使得能够电连接到显示器的电传导线变得更接近于中性线,这可以减少使用中的机械压力。根据本发明前板44在显示区之外的区46之上延伸,特别地基本上对应于结合区48。优选地,结合区48的区域中的前板被提供有空间47,用于布置实现到电子像素阵列和/或到光电元件阵列的连接的合适的电接触。空间47可以是单独布置或彼此连接以在结合区48上形成单独空间任意合适的形状。还注意到,前板不必需完全覆盖有电泳材料。使用合适的本身已知的边缘密封来覆盖显示区之外的区用于改善对机械压力的阻抗是足够的。
虽然上述已经描述了特定的实施例,可以理解,本发明可以与上述不同而实践。上面的描述是示例性的而不是限制性的。因此,本领域技术人员可以理解,在不背离权利要求范围内可以对上述发明进行修改。

Claims (10)

1.一种柔性显示器,包括:
底板,包括底板基片和电子像素阵列;
前板,包括前板基片和光电元件阵列;
所述前板层合在所述底板上,前板区基本上与底板区相匹配;
结合区,布置为实现到所述电子像素阵列和/或到所述光电元件阵列的连接;
其中,所述前板延伸到显示区之外的所述底板区的区域中,并且部分终止于所述底板的边缘处,
其中,在延伸到所述显示区之外的所述底板区的区域中的
所述前板区中提供空间,用于布置实现所述连接的电接触;以及
其中,没有被前板覆盖的区域中的用于使得能够电连接到显示器的电传导线变得更接近于中性线。
2.根据权利要求1所述的柔性显示器,其中,所述前板至少延伸到所述结合区的区域中。
3.根据权利要求1所述的柔性显示器,其中,所述底板包括薄膜晶体管并且所述前板包括电泳显示器。
4.根据权利要求1所述的柔性显示器,其中,所述电子像素阵列和/或所述光电元件阵列包括位于接近各自阵列的中性线的层。
5.一种制造柔性显示器的方法,包括:
提供布置有电子像素阵列的底板;
提供包括光电元件阵列的前板,前板区基本上与底板区相匹配,所述前板延伸到显示区之外的所述底板区的区域中,并且部分终止于所述底板的边缘处;
提供用于实现到所述电子像素阵列和/或到所述光电元件阵列的连接的结合区,以及,
在延伸到所述显示区之外的所述底板区的区域中的所述前板区中形成空间,用于布置实现所述连接的电接触;
其中,没有被前板覆盖的区域中的用于使得能够电连接到显示器的电传导线变得更接近于中性线。
6.根据权利要求5所述的方法,其中,通过旋涂将所述底板和/或所述前板的各自的层沉积在底板基片和/或前板基片上。
7.根据权利要求5所述的方法,其中,使用光刻法来图案化所述底板和/或所述前板的各自的层。
8.根据权利要求2所述的柔性显示器,其中,所述底板包括薄膜晶体管并且所述前板包括电泳显示器。
9.根据权利要求2所述的柔性显示器,其中,所述电子像素阵列和/或所述光电元件阵列包括位于接近各自阵列的中性线的层。
10.根据权利要求3所述的柔性显示器,其中,所述电子像素阵列和/或所述光电元件阵列包括位于接近各自阵列的中性线的层。
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