An inkjet printed stripe-type color filter of liquid crystal display
An inkjet printed stripe-type color filter of liquid crystal display
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一种液晶显示器喷墨印刷条纹型彩色滤光片
DOI：
10.1088/0960-1317/20/5/055004
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发表时间：
2010
影响因子：
2.3
通讯作者：
F. Shieh
中科院分区：
文献类型：
--
作者：
Chin;Kuo;Chunping Lu;F. Shieh
在本文中，我们提出了一种按需滴注（DOD）喷墨印刷工艺的全面概念和新设计，用于在平面基板的结构化表面上制造液晶显示器（LCD）的滤色片（CF）层，由用于对准和控制液体形态的“物理侧壁”组成。当前的喷墨打印技术已经解决了设计的几个基本准则。使用沉积系统的液滴发生器（打印头），彩色墨滴可以喷射并放置在特定的区域上，其中侧壁与液滴流合并的流对齐并满足定义区域的覆盖，其中液滴和侧壁相关的几何关系在研究中明确表达。根据模拟和分析的结果，所提出的侧壁作为物理屏障，可以通过简单的几何因素（例如侧壁宽度、高度和接触角）来控制液体形态。实验结果表明，除了侧壁附近以外，固体RGB颜色层是由液滴自组装而成，并且形成的厚度均匀。这表明，作为“物理屏障”的侧壁在将液滴流限制在所需区域内并使其自对准方面具有显着效果。这种喷墨印刷方法也可以为多功能 LCD CF 的生产提供一种经济有效且高灵活性的方法，因此特别有利于大面积印刷和柔性基板。
In this paper, we propose a comprehensive concept and new design of a drop-on-demand (DOD) inkjet printing process for fabricating color filter (CF) layers of liquid crystal displays (LCDs) onto the structured surfaces of flat substrates, composed of ‘physical sidewalls’ for aligning and controlling the liquid morphology. Several fundamental guidelines of the design have been addressed in current inkjet-printing techniques. Using a droplet generator (printhead) of the deposition system, the color-ink drops can be jetted and placed over the specific domains, where the sidewalls align the flow merged from a stream of droplets and fulfill the coverage of the defined areas, in which the geometrical relations correlating the droplets and sidewalls are explicitly expressed in the study. According to the results of the simulation and analysis, the proposed sidewalls, acting as the physical barriers, can control the liquid morphology through the simple geometric factors such as sidewall widths, heights and contact angles. The experimental results showed that the solid RGB color layers were self-assembled from the liquid droplets and formed with the uniform thickness, except for the neighborhood of the sidewalls. It indicated that the sidewalls serving as ‘physical barriers’ had a remarkable effect in confining and self-aligning the droplet flow within the desirable regions. This inkjet-printing method would alternatively offer one cost-effective and high-flexibility method for the production of the versatile LCD CF, thus being particularly beneficial for large-area printing and flexible substrates.