ADS TFT-LCD漏光敏感性影响因素研究与改善

ADS TFT-LCD暗态受外力时存在漏光亮度高、范围大、颜色偏黄的敏感性差问题,模组极易产生漏光。本文研究了玻璃、液晶和隔垫物(PS)3方面对暗态漏光敏感性的影响。研究得出,玻璃厚度减小,可以改善按压亮度变化,例如外力30N时,0.5T玻璃的L_o亮度相比0.7T L_o亮度下降了33%;降低液晶Δnd可以改善按压发黄;相同Δnd,减小Δn,增加K,可减少LC散射,继而可减小按压亮度高和范围大问题,例如外力30N时,散射值0.027的L_o亮度相比散射值0.038的L_o亮度下降了28%;增加PS的支撑密度,可以减小按压亮度和范围的变化,例如PS密度3 168 μm~2/mm~2的L_o亮度相比PS密度2 364 μm~2/mm~2的L_o亮度下降了22%。通过以上措施,可以改善ADS产品L_o漏光敏感性。本文对敏感性改善的机理也做了相应解释。

Research and improvement of influencing factors on ADS TFT-LCD light leakage sensitivity

ADS TFT-LCD module easily produces Dark light leakage due to the problem of poor light leakage sensitivity. Poor light leakage sensitivity appears with high brightness, large leakage range and yellow color when an external force is applied. In this paper, the effects of glass, LC and PS on the sensitivity to dark light leakage were studied. The result shows that the reduction in glass thickness can improve brightness change, and the decline of △nd can improve yellow color when an external force is applied. For example, when external force 30 N, 0.5 T glass L_o brightness is lower than 0.7 T L_o brightness by 33%.The result reveals if the △nd is the same, decreasing △n or increasing K can reduce LC scatter, which can improve high brightness and large range light leakage. For example, when the external force 30 N, the L_o brightness of the scattering value of 0.027 is reduced by 28% compared with the scattering value of 0.038.The result also shows that the increase of PS support density can improve high brightness and large range light leakage. For example, the L_o brightness of PS density of 3 168 μm²/mm²is lower than PS density of 2 364 μm²/mm² by 22%.The solution to light leakage sensitivity was established by the research and its theoretical explanation was also given.