数字驱动型OLED的动态假轮廓量化及改善策略  

Dynamic False Contour Quantification and Improvement Strategy of Digital Driven OLED

作　　者：季渊[1,2] 张凯文 陈文栋 穆廷洲 龚淑萍 JI Yuan;ZHANG Kaiwen;CHEN Wendong;MU Tingzhou;GONG Shuping(Microelectronics Research and Development Center,Shanghai University,Shanghai 200444,China;School of Mechatronic Engineering and Automation,Shanghai University,Shanghai 200444,China)

机构地区：[1]上海大学微电子研究与开发中心,上海200444 [2]上海大学机电工程与自动化学院,上海200444

出　　处：《光子学报》2021年第9期207-214,共8页Acta Photonica Sinica

基　　金：国家自然科学基金(Nos.61674100,61774101);军民融合发展专项(No.2019-jmrh1-kj37)。

摘　　要：针对数字驱动型OLED在显示运动画面时会出现动态假轮廓现象,严重影响人眼观看质量的问题,通过分析动态假轮廓产生机理,考虑人眼的视觉特性,提出最小可察觉失真积分法来量化不同扫描策略产生的动态假轮廓,并通过实验验证该评估方法的可靠性。将线性脉宽调制法和分形扫描法结合,提出偏分形的扫描策略来改善动态假轮廓现象。当线性脉宽调制法和分形扫描法的数据位数都为4 bit时,在分辨率1280×1024的硅基OLED微显示器上进行现场可编程门阵列的系统验证,人眼不会察觉到动态假轮廓现象。利用最小可察觉失真积分法对偏分形扫描算法进行评估,相比传统19子场和分形扫描,任意两灰度间的动态假轮廓量化均值分别降低约87.86%和86.51%。Aiming at dynamic false contour phenomenon may appear when digital driven OLED displays moving pictures,which affects the viewing quality of human eyes,the machanism of dynamic false contour generation is analyzed,and the visual characteristics of the human eye are considered.Just noticeable distortion integral method is proposed to quantify the dynamic false contour generated by different scanning strategies,the reliability of the evaluation method is verified through experiments.The linear pulse width modulation method and the fractal scanning method are combined,the partial fractal scanning strategy is proposed to improve the dynamic false contour phenomenon.When the data bits of the linear pulse width modulation method and the fractal scanning method are both 4 bit,the system verification of field programmable gate array is performed on a silicon-based organic light-emitting diodes microdisplay with a resolution of 1280×1024,and the dynamic contour phenmenon may not be perceived by the human eye.Just noticeable distortion integral method is used to evaluate the partial fractal scanning algorithm,compared with the traditional 19 subfields and fractal scanning,the average value of dynamic false contour quantization between any two gray levels is reduced by about 87.86%and 86.51%.

关 键 词：有机电致发光二极管 运动图像 脉宽调制 分形 现场可编程门阵列 

分 类 号：TN27[电子电信—物理电子学]