CN108957899B - 一种双层微结构的显示电浆模组及其制造方法 - Google Patents
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Abstract
本发明属于电子显示技术领域,涉及一种双层微结构的显示电浆模组,包括像素电极及位于像素电极上方的透明电极,所述像素电极和透明电极间设有显示电浆及包围所述显示电浆的衬垫边框,所述像素电极和/或透明电极上设有用于均匀分散和稳固显示电浆的电浆阻离阵列,在所述电浆阻离阵列上吸附有间隔粒子层;本发明的显示电浆模组直接使用显示电浆替代现有的微杯结构或微胶囊,并在显示电浆中设置用于均匀分散、稳固和隔离显示电浆的电浆阻离阵列及间隔粒子层,起到支撑整个显示电浆模组和控制显示电浆厚度的作用,同时有效防止显示电浆无序流动,保障了像素电极和透明电极之间电场方向的垂直度。
Description
技术领域
本发明涉及一种显示电浆模组及其制造方法,尤其是一种双层微结构的显示电浆模组及其制造方法,属于电子显示技术领域。
背景技术
电泳显示利用带电的胶体颗粒在电场作用下发生泳动的现象,通过电场驱动不同光电性能的电泳粒子来实现图像和文字的显示,与已知的显示技术相比,电泳显示具备如下特点:柔性易弯曲,重量轻,厚度薄,对比度高,能耗低,可视角度大,阳光下可读,具备图像双稳态,容易大面积生产等特点。
电泳显示技术最初在上世纪70年代被提出。在专利US3892568中公开了至少包含一种电泳粒子的电泳显示材料的制备过程。在专利JP1086116中公开了至少含有一种电泳粒子,并且电泳液被微胶囊包覆的电泳显示系统。在US6930818中公开了使用微杯结构包覆电泳液的电泳显示单元。在专利US5930026,US5961804,US6017584和US6120588中,公开了微胶囊包覆的电泳显示单元,其中显示电浆包含两种或者两种以上不同光电性能的电泳粒子。纵观之前的已有技术,微杯和微胶囊型电子墨水显示屏都是基于微小的空腔结构,即微杯和微胶囊。这两种微结构的作用在于分散包覆显示电浆。
尽管两种结构的显示屏都在实际产品得以应用,但是两种结构具有如下缺点:
1)微胶囊和微杯本身不具备显示功能,虽然其组成材料多是透明,遮盖力差的材料,但在整个电泳显示体系中用量较大,会影响整个显示屏的显示效果,对比度下降,分辨率下降,以及使用寿命降低;
2)微胶囊和微杯结构的存在无疑加厚整个电泳显示材料层的厚度,使得显示屏对比度和分辨率下降,响应速度慢,驱动电压高,刷新慢,功耗大,工作温度范围窄;
3)微胶囊和微杯结构制备过程过于复杂,造成生产制造上的困难和浪费,造成良率下降,材料浪费,制造成本高。
发明内容
本发明的目的是针对目前电子显示屏的问题,提供一种双层微结构的显示电浆模组及其制造方法,可以直接使用显示电浆替代现有的微杯结构或微胶囊,并在显示电浆中设置用于均匀分散、稳固和隔离显示电浆的电浆阻离阵列及间隔粒子层,起到支撑电极和控制显示电浆厚度的作用,同时有效防止显示电浆无序流动,保障了像素电极和透明电极之间电场方向的垂直度。
为实现以上技术目的,本发明的技术方案是:一种双层微结构的显示电浆模组,包括像素电极及位于像素电极上方的透明电极,其特征在于,所述像素电极和透明电极间设有显示电浆及包围所述显示电浆的衬垫边框,所述像素电极和/或透明电极上设有用于均匀分散和稳固显示电浆的电浆阻离阵列,在所述电浆阻离阵列上吸附有间隔粒子层。
进一步地,所述电浆阻离阵列包括若干个呈阵列分布的电浆阻离框,所述像素电极包括若干个呈阵列分布的像素电极单元,每个电浆阻离框内包括若干个像素电极单元,且在所述像素电极上的电浆阻离框覆盖在source路线和gate线路上。
进一步地,所述电浆阻离阵列中电浆阻离框的宽度在1-30微米之间,高度在0.1-60微米之间,所述间隔粒子层中的间隔粒子的大小在1-10微米之间。
进一步地,所述电浆阻离阵列中的电浆阻离框及衬垫边框的材料为丙烯酸树脂、聚氨酯树脂、环氧树脂、有机硅树脂或二氧化硅;所述间隔粒子层中的间隔粒子为聚合物微球或二氧化硅微球。
进一步地,所述像素电极内嵌在TFT玻璃基板上,且像素电极与显示电浆间通过遮光绝缘胶水层黏附。
进一步地,所述透明电极包括覆盖在显示电浆、衬垫边框上的导电层及覆盖在所述导电层上的透明基材;在所述衬垫边框与导电层间、在所述显示电浆边缘与导电层间均设有显示区保护层。
进一步地,所述显示电浆的厚度在2-70微米之间,且显示电浆中电泳液的粘度为100-100000厘泊,所述显示电浆中包含至少两种不同光电性能的电泳粒子。
进一步地,所述衬垫边框内可添加支撑微球,所述支撑微球的包括树脂微球、玻璃微球,且支撑微球的直径为2-60微米。
为了进一步实现以上技术目的,本发明还提出一种双层微结构的显示电浆模组制造方法,其特征是,包括如下步骤:
步骤一. 在所述像素电极和/或透明电极的导电层上预先制备好电浆阻离阵列;
步骤二. 将像素电极嵌入TFT玻璃基板内,并将TFT玻璃基板放置在点胶平台上;
步骤三. 在像素电极上点封框胶,形成衬垫边框;
步骤四. 在衬垫边框内丝印显示电浆和喷涂间隔粒子,较轻的间隔粒子漂浮在显示电浆上;
步骤五. 在衬垫边框内涂覆导电银浆,所述导电银浆与像素电极电连接;
步骤六. 先将显示区保护层压合在整个衬垫边框上,再将透明电极压合在衬垫边框和显示电浆上,在此过程中,大部分间隔粒子受到挤压被转移吸附在电浆阻离阵列的电浆阻离框上,形成间隔粒子层,然后进行固化,所述导电银浆与透明电极的导电层电连接;
步骤七. 切割掉边缘部分透明电极和显示区保护层,露出像素电极上集成电路模块IC和柔性电路板绑定的预定位置;
步骤八. 将集成电路模块IC和柔性电路板均通过导电胶条粘附在像素电极的边缘;
步骤九. 将集成电路模块IC、柔性电路板和导电胶条周围通过蓝胶固封在像素电极上,完成电子墨水显示屏的制造。
进一步地,所述步骤一中,所述像素电极表面可预先涂覆好遮光绝缘胶水层,所述步骤三中,在所述封框胶内可预先涂覆好支撑微球。
进一步地,所述步骤一中,所述电浆阻离阵列通过印刷、涂布或点胶方式涂覆在像素电极或者透明电极的导电层表面,再通过光固化的、热固化或者湿气固化,或者通过物理生长、化学生长方式实现。
与传统电子墨水显示屏相比,本发明具有以下优点:
1)相较于传统的微结构电泳显示屏,由于传统微胶囊或微杯不参与显示,因此会影响显示效果,本发明采用显示电浆,去掉了微胶囊或微杯,显示效果更好,对比度提高10%以上;
2)本发明的显示电浆能够降低整个电泳显示层的厚度,响应时间降到80毫秒以下,驱动电压降低到正负1.5-8V之间,工作温度范围拓宽为-30-70度,同时降低了制作成本;
3)本发明在像素电极和透明电极间设置电浆阻离阵列,可以有效均匀分散并稳固显示电浆,并提高显示效果;同时在像素电极上的电浆阻离阵列覆盖在source路线和gate线路上,能够有效防止相邻像素电极之间的短路及像素电极之间产生电场的窜扰,同时也阻止了显示电浆的电泳粒子在source线路和gate线路上聚集,保障了像素电极和透明电极之间电场的方向性和垂直度,防止了显示电浆中的电泳粒子的无序运动;
4)本发明在像素电极和透明电极间设置电浆阻离阵列和间隔粒子层,与只有电浆阻离阵列结构相比,间隔粒子层和电浆阻离阵列起到了支撑电极和控制显示电浆厚度的作用,并将整个显示电浆分割为多个阻力框,在电场作用下,保证电泳粒子沿着电场方向垂直有序运动,保证了显示电浆的稳固性,提高显示屏对比度和显示效果;
5)本发明的显示区保护层对显示区的显示电浆进行保护,起到遮光和绝缘的作用;
6)本发明的遮光层绝缘胶水层用于保护像素电极不受光学照射,隔离显示电浆和像素电极,防止显示电浆损害像素电极;
7)本发明工艺可以生产100寸以上大尺度的超薄显示电浆模组。
附图说明
图1为本发明实施例1的侧视结构示意图。
图2为图1中A部分的剖视结构示意图。
附图标记说明:1—透明电极;2—导电层;3—显示电浆;4—支撑微球;5—遮光绝缘胶水层;6—衬垫边框;7—TFT玻璃基板;8—显示区保护层;9—蓝胶;10—导电银浆;11—IC集成电路模块;12—柔性电路板;13—像素电极;14—电浆阻离阵列;15—透明基材;16—间隔粒子层。
具体实施方式
下面结合具体附图和实施例对本发明作进一步说明。
本发明不限于以下的实施方式,在以下的说明中所参照的各图是为了能够对本发明的内容进行理解而设置的,即本发明不限于各图所举例的电子墨水显示屏结构。
如附图1和图2所示,实施例1以双粒子电子墨水显示屏为例,一种双层微结构的显示电浆模组,包括像素电极13及位于像素电极13上方的透明电极1,所述像素电极13和透明电极1间设有显示电浆3及包围所述显示电浆3的衬垫边框6,所述像素电极13上设有用于均匀分散和稳固显示电浆3的电浆阻离阵列14,在所述电浆阻离阵列14上吸附有间隔粒子层16。
所述电浆阻离阵列14包括若干个呈阵列分布的电浆阻离框,所述像素电极13包括若干个呈阵列分布的像素电极单元,每个电浆阻离框内包括若干个像素电极单元,且在所述像素电极13上的电浆阻离框覆盖在source路线和gate线路上;所述电浆阻离阵列14中的电浆阻离框及衬垫边框6的材料为丙烯酸树脂、聚氨酯树脂、环氧树脂、有机硅树脂或二氧化硅;本实施例1中电浆阻离阵列14中电浆阻离框的宽度在1-30微米之间,优选高度为1-10微米之间,高度在0.1-60微米之间,优选宽度为5-15微米之间;所述间隔粒子层16中的间隔粒子为聚合物微球或二氧化硅微球;本实施例1中间隔粒子层16中的间隔粒子的大小在1-10微米之间,优选大小为2-8微米之间;
在透明电极1和像素电极13之间,电浆阻离阵列14和间隔粒子层16将整个显示电浆3分成若干个阻离框,在IC集成电路模块11的驱动下,所述像素电极13可以包括段码,点矩阵等,由于间隔粒子层16的存在,电泳粒子只能在像素电极13和透明电极1间的电场方向上垂直上下运动,有效防止了显示电浆3中的电泳粒子沿着透明电极1无序运动,保证了显示电浆3的稳固性,可以使显示屏实现显示黑白色,提高显示屏对比度和显示效果;
所述像素电极13内嵌在TFT玻璃基板上,且像素电极13与显示电浆3间通过遮光绝缘胶水层5黏附,胶水可以是水型,溶剂型,热熔型,光固化型等,优选为水型和光固化型,涂覆遮光绝缘胶水层5的厚度范围在1-20微米,优选厚度范围是2-10微米;
所述透明电极1包括覆盖在显示电浆3、衬垫边框6上的导电层2及覆盖在所述导电层2上的透明基材15;在所述衬垫边框6与导电层2间、在所述显示电浆3边缘与导电层2间均设有显示区保护层8。
所述显示电浆3的厚度在2-70微米之间,优选厚度在8-20微米之间,且显示电浆3中电泳液的粘度为100-100000厘泊,优选粘度选择在1000-10000厘泊,所述显示电浆3中包含至少两种不同光电性能的电泳粒子。
本实施例1中的衬垫边框6内添加有支撑微球4,所述支撑微球4的包括树脂微球、玻璃微球,且支撑微球4的直径为2-60微米,优选大小在5-30微米之间。
本发明实施例还可以在透明电极1上设置用于均匀分散和稳固显示电浆3的电浆阻离阵列14,在所述电浆阻离阵列14和像素电极13间设有间隔粒子层16;或者在透明电极1和像素电极13上均设置用于均匀分散和稳固显示电浆3的电浆阻离阵列14,在所述电浆阻离阵列14间设置吸附间隔粒子层16;在透明电极1和像素电极13之间,电浆阻离阵列14和间隔粒子层16将整个显示电浆3分成若干个阻离框,在IC集成电路模块11的驱动下,所述像素电极13可以包括段码,点矩阵等,由于间隔粒子层16的存在,大部分电泳粒子只能在像素电极13和透明电极1间的电场方向上垂直上下运动,有效防止了显示电浆3中的电泳粒子在电浆阻离框间的空隙无序运动,保证了显示电浆3的稳固性,提高显示屏对比度和显示效果。
如上实施例中的一种双层微结构的显示电浆模组制造方法,包括如下步骤:
步骤一. 在所述像素电极13和/或透明电极1的导电层2上预先制备好电浆阻离阵列14;所述电浆阻离阵列14通过印刷、涂布或点胶方式涂覆在像素电极13或者透明电极1的导电层2表面,再通过光固化的、热固化或者湿气固化,或者通过物理生长、化学生长方式实现;
在所述像素电极13表面可预先涂覆好遮光绝缘胶水层5;
步骤二. 将像素电极13嵌入TFT玻璃基板7内,并将TFT玻璃基板7放置在点胶平台上;
步骤三. 在像素电极13上点封框胶,形成衬垫边框6,所述衬垫边框6包围像素电极13;在所述封框胶内可预先涂覆好支撑微球4,由于支撑微球4为实心球,因此支撑微球4能够用于支撑整个显示电浆模组;
步骤四. 在衬垫边框6内丝印显示电浆3和喷涂间隔粒子,由于间隔粒子的材料为为聚合物微球或二氧化硅微球,大小在2-8微米之间,同时间隔粒子的重量约为显示电浆球的1/5,因此间隔粒子较轻,可漂浮在显示电浆3上;
步骤五. 在衬垫边框6内涂覆导电银浆10,使导电银浆10与像素电极13电连接;
步骤六. 先将显示区保护层8压合在整个衬垫边框6上,再将透明电极1(包括导电层2和透明基材15)压合在衬垫边框6和显示电浆3上,在此过程中,由于间隔粒子和电浆阻离阵列14间存在吸附力,大部分间隔粒子受到挤压被转移吸附在电浆阻离阵列14的电浆阻离框上,形成间隔粒子层16,然后进行固化,所述导电银浆10与透明电极1的导电层2电连接;
步骤七. 切割掉边缘部分透明电极1和显示区保护层8,露出像素电极13上IC集成电路模块11和柔性电路板12绑定的预定位置;
步骤八. 将IC集成电路模块11和柔性电路板12均通过导电胶条粘附在像素电极13的边缘;
步骤九. 将IC集成电路模块11、柔性电路板12和导电胶条周围通过蓝胶9固封在像素电极13上,完成电子墨水显示屏的制造。
本发明的显示电浆3中包含至少两种不同光电性能的电泳粒子,光电性能不同的电泳粒子,电泳粒子优选的颜色包括白色,黑色,红色,绿色,蓝色和黄色等,用来实现黑白、单彩色、双彩色、多彩色和真彩色等显示,同时显示电浆3中可以包含荧光材料,荧光材料包括无机荧光材料和有机荧光材料,无机荧光材料包括稀土荧光材料,金属硫化物等,有机荧光材料包括小分子荧光材料和高分子荧光材料等。
本发明的显示电浆模组不需要使用微胶囊或微杯等传统微结构,直接使用显示电浆3,并在透明电极1和像素电极13间的显示电浆3中设置电浆阻离阵列14和间隔粒子层16,用于支撑整个电视电浆模组,且能够降低显示电浆模组厚度, 并将整个显示电浆分割为多个阻力框,在电场作用下,保证电泳粒子沿着电场方向有序运动,保证了显示电浆的稳固性,提高显示屏对比度和显示效果。
以上对本发明及其实施方式进行了描述,该描述没有限制性,附图中所示的也只是本发明的实施方式之一,实际结构并不局限于此。总而言之如果本领域的普通技术人员受其启示,在不脱离本发明创造宗旨的情况下,不经创造性的设计出与该技术方案相似的结构方式及实施例,均应属于本发明的保护范围。
Claims (9)
1.一种双层微结构的显示电浆模组制造方法,其特征是,所述双层微结构的显示电浆模组包括像素电极(13)及位于像素电极(13)上方的透明电极(1),其特征在于,所述像素电极(13)和透明电极(1)间设有显示电浆(3)及包围所述显示电浆(3)的衬垫边框(6),所述像素电极(13)和/或透明电极(1)上设有用于均匀分散和稳固显示电浆(3)的电浆阻离阵列(14),在所述电浆阻离阵列(14)上吸附有间隔粒子层(16);
所述方法包括如下步骤:
步骤一. 在所述像素电极(13)和/或透明电极(1)的导电层(2)上预先制备好电浆阻离阵列(14);
步骤二. 将像素电极(13)嵌入TFT玻璃基板(7)内,并将TFT玻璃基板(7)放置在点胶平台上;
步骤三. 在像素电极(13)上点封框胶,形成衬垫边框(6);
步骤四. 在衬垫边框(6)内丝印显示电浆(3)和喷涂间隔粒子,较轻的间隔粒子漂浮在显示电浆(3)上;
步骤五. 在衬垫边框(6)内涂覆导电银浆(10),所述导电银浆(10)与像素电极(13)电连接;
步骤六. 先将显示区保护层(8)压合在整个衬垫边框(6)上,再将透明电极(1)压合在衬垫边框(6)和显示电浆(3)上,在此过程中,大部分间隔粒子受到挤压被转移吸附在电浆阻离阵列(14)的电浆阻离框上,形成间隔粒子层(16),然后进行固化,所述导电银浆(10)与透明电极(1)的导电层(2)电连接;
步骤七. 切割掉边缘部分透明电极(1)和显示区保护层(8),露出像素电极(13)上集成电路模块IC(11)和柔性电路板(12)绑定的预定位置;
步骤八. 将集成电路模块IC(11)和柔性电路板(12)均通过导电胶条粘附在像素电极(13)的边缘;
步骤九. 将集成电路模块IC(11)、柔性电路板(12)和导电胶条周围通过蓝胶(9)固封在像素电极(13)上,完成电子墨水显示屏的制造。
2.根据权利要求1所述的一种双层微结构的显示电浆模组制造方法,其特征在于:所述电浆阻离阵列(14)包括若干个呈阵列分布的电浆阻离框,所述像素电极(13)包括若干个呈阵列分布的像素电极单元,每个电浆阻离框内包括若干个像素电极单元,且在所述像素电极(13)上的电浆阻离框覆盖在source路线和gate线路上。
3.根据权利要求1所述的一种双层微结构的显示电浆模组制造方法,其特征在于:所述电浆阻离阵列(14)中电浆阻离框的宽度在1-30微米之间,高度在0.1-60微米之间,所述间隔粒子层(16)中的间隔粒子的大小在1-10微米之间。
4.根据权利要求1所述的一种双层微结构的显示电浆模组制造方法,其特征在于:所述电浆阻离阵列(14)中的电浆阻离框及衬垫边框(6)的材料为丙烯酸树脂、聚氨酯树脂、环氧树脂、有机硅树脂或二氧化硅;所述间隔粒子层(16)中的间隔粒子为聚合物微球或二氧化硅微球。
5.根据权利要求1所述的一种双层微结构的显示电浆模组制造方法,其特征在于:所述像素电极(13)内嵌在TFT玻璃基板(7)上,且像素电极(13)与显示电浆(3)间通过遮光绝缘胶水层(5)黏附。
6.根据权利要求1所述的一种双层微结构的显示电浆模组制造方法,其特征在于:所述透明电极(1)包括覆盖在显示电浆(3)、衬垫边框(6)上的导电层(2)及覆盖在所述导电层(2)上的透明基材(15);在所述衬垫边框(6)与导电层(2)间、在所述显示电浆(3)边缘与导电层(2)间均设有显示区保护层(8)。
7.根据权利要求1所述的一种双层微结构的显示电浆模组制造方法,其特征在于:所述显示电浆(3)的厚度在2-70微米之间,且显示电浆(3)中电泳液的粘度为100-100000厘泊,所述显示电浆(3)中包含至少两种不同光电性能的电泳粒子。
8.根据权利要求1所述的一种双层微结构的显示电浆模组制造方法,其特征在于:所述衬垫边框(6)内可添加支撑微球(4),所述支撑微球(4)的包括树脂微球、玻璃微球,且支撑微球(4)的直径为2-60微米。
9.根据权利要求1所述的一种双层微结构的显示电浆模组制造方法,其特征在于:所述步骤一中,所述像素电极(13)表面可预先涂覆好遮光绝缘胶水层(5),所述电浆阻离阵列(14)通过印刷、涂布或点胶方式涂覆在像素电极(13)或者透明电极(1)的导电层(2)表面,再通过光固化的、热固化或者湿气固化,或者通过物理生长、化学生长方式实现;所述步骤三中,在所述封框胶内可预先涂覆好支撑微球(4)。
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