液晶与显示, 2019, 34 (12): 1172, 网络出版: 2020-01-09   

TFT-LCD画面闪烁影响因子及定量分析方法

TFT-LCD flicker influence factors and quantitative analysis method
作者单位
京东方科技集团股份有限公司 重庆京东方光电科技有限公司, 重庆 400700
摘要
画面闪烁(Flicker)是TFT-LCD画面品质评价的重要指标。文章基于ΔVp及闪烁发生机理, 通过一系列实验, 首先研究了Vcom对闪烁的影响, 结果表明Vcom对闪烁具有显著影响; 随着闪烁灰阶升高, 最佳闪烁呈逐渐减小趋势, 常白模式产品最佳闪烁对应Vcom逐渐减小, 而常黑模式产品最佳闪烁对应Vcom逐渐增加。其次, 研究了VGH、VGL对闪烁影响, 结果表明VGH、VGL变化对闪烁均有显著影响; 同一闪烁灰阶, VGH增加不会影响最佳闪烁, 但对应Vcom逐渐减小, 而VGL增加最佳闪烁逐渐减小, 但对应Vcom逐渐增加。最后, 提出一种可以预测不同灰阶闪烁水平的定量分析方法, 通过该方法计算得到的闪烁水平与VESA标准下FMA测试法所得的闪烁值趋势一致, 常白模式和常黑模式产品线性相关系数均达0.95以上, 证明该方法可以用来预测不同灰阶闪烁水平。这些研究对改善TFT-LCD 闪烁问题提供了分析方法和解决思路。
Abstract
Flicker is an important index of TFT-LCD image quality evaluation. Based on the mechanism of ΔVp and flicker, the influence of Vcom on flicker is studied, and the experiment results show that Vcom has a significant impact on flicker. With the increase of flicker gray level, the optimum flicker tends to decrease gradually and its corresponding Vcom for TN mode products decreases gradually, while ADS mode products increases gradually. Secondly, the article studied The impact of VGH and VGLon flicker is stadied, the results indicate that VGH and VGL have important impact on flicker. When flicker gray level is invariable, the VGH increase will not affect the optimal flicker, but the corresponding Vcom decreases gradually. While the VGL increase the optimal flicker decreases gradually, but the corresponding Vcom increases gradually. A quantitative analysis method is proposed for predicting flicker scales of different gray level and proved that it can be used to predict the flicker scale of different gray level, because the calculated flicker is consistent with measurement flicker value by FMA test method under VESA standard, and the linear correlation coefficients are above 0.95 for both TN mode and ADS mode products. These studies provide analytical methods and solutions for improving TFT-LCD flicker problem.

朱海鹏, 吴海龙, 但艺, 冉敏, 周欢, 付剑波, 周焱, 闵泰烨. TFT-LCD画面闪烁影响因子及定量分析方法[J]. 液晶与显示, 2019, 34(12): 1172. ZHU Hai-peng, WU Hai-long, DAN Yi, RAN Min, ZHOU Huan, FU Jian-bo, ZHOU Yan, MIN Tai-ye. TFT-LCD flicker influence factors and quantitative analysis method[J]. Chinese Journal of Liquid Crystals and Displays, 2019, 34(12): 1172.

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