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为了实现TFT LCD高PPI产品的高分辨率,高开口率,低功耗全面提升,分析了不同因素的影响程度,加强了对取向膜印刷品质的管控。同时对涉及该过程相关因素进行研究分析。对取向膜画面品质相关的产线印刷和干燥条件、APR版制作工艺、取向膜膜厚变化、APR版线数开口率进行优化测试,找到了可以提高取向膜画面品质的方法。实验结果表明:通过对取向膜印刷和干燥条件优化,确定了TN产品画面品质提升的产线管控方案;在APR版制作过程中引用扩散保护膜,ADS产品Particle类不良降低2%,Scratch类不良降低1%;对取向膜膜厚提升,ADS产品的段差和残像得到改善,对比度提升30~120,Zara Particle不良降低30%;通过对APR版的网点,开口率优化:400L,30%,普通曝光的APR版更新为600L,20%,高PPI有机膜类产品的Sand Mura发生率降低为0%。可以满足高PPI产品对取向膜印刷稳定的管控要求,适应高分辨率、高开口率、低功耗等要求。
In order to achieve the high resolution, high aperture ratio and low power consumption of high PPI TFT LCD products, the influence of different factors was analyzed and the control of the printing quality of oriented films was strengthened. At the same time, the relevant factors involved in the process of research and analysis. The printing and drying conditions of the line, the production process of APR, the change of the thickness of the alignment film and the aperture ratio of the APR plate were optimized and tested, and the method of improving the picture quality of the oriented film was found out. The experimental results show that the production line control scheme of improving the quality of the TN product picture is determined by optimizing the printing and drying conditions of the oriented film. When the diffusion protective film is used in the production of the APR plate, the ADS product Particle class is reduced by 2%, the Scratch type is bad 1%; the film thickness of the alignment film is improved, the ADS product segment and afterimage are improved, the contrast is improved by 30 to 120, and the Zara Particle is reduced by 30%; the aperture ratio of the APR version is optimized: 400L, 30% Exposure APR version updated to 600L, 20%, high PPI organic film products Sand Mura incidence decreased to 0%. PPI products to meet the stability of the oriented film printing control requirements, to adapt to high-resolution, high aperture ratio, low power consumption and other requirements.