基于超像素的硅基OLED微显示器数字驱动成像质量研究  

Research on Digital Drive Imaging Quality of Silicon-based OLED Micro Display Based on Super Pixel

作　　者：季渊[1,2] 陈鸿港 陈宝良 张引 许怡晴 JI Yuan;CHEN Honggang;CHEN Baoliang;ZHANG Yin;XU Yiqing(Microelectronics Research and Development Center,Shanghai University,Shanghai 200072,China;School of Mechatronic Engineering and Automation,Shanghai University,Shanghai 200072,China)

机构地区：[1]上海大学微电子研究与开发中心,上海200072 [2]上海大学机电工程与自动化学院,上海200072

出　　处：《光子学报》2023年第9期178-188,共11页Acta Photonica Sinica

基　　金：国家自然科学基金(Nos.61674100,61774101)。

摘　　要：针对微显示器分辨率、刷新率低,显示运动画面时产生动态假轮廓等成像问题,通过分析超像素技术的特性及驱动原理,结合数字驱动方式,提出数字驱动型超像素扫描策略。利用人眼的积分特性和视觉暂留特性,通过帧与帧之间在时间上切换,空间上偏移的方式,降低数据传输带宽,改善动态假轮廓现象,提升显示器成像效果。结合超像素技术设计一款数字驱动型超像素微显示控制器,并在分辨率为2048×2048的全彩硅基OLED微显示器上验证其可行性。仿真分析结果表明,基于超像素的数字驱动扫描策略在分辨率主观感知不变的条件下,数据传输带宽减少50%。利用最小可察觉失真积分法进行评估,超像素扫描策略动态假轮廓等于0和不超过8灰度的概率分别约为93.3%和99.3%,成像质量有较大提升。With the development of new display technology and the continuous warming of the concept of metauniverse,micro-display has been widely used in near-eye display fields such as virtual reality and augmented reality.The silicon-based OLED micro-display has become the best choice for near-eye display devices due to its advantages of small area,high brightness,fast response,wide color gamut and high resolution.traditional silicon-based OLED micro-displays mostly adopt analog drive mode,but it is difficult to meet the requirements of high resolution and high refresh rate due to the limitation of the conversion speed and accuracy of digital-to-analog converter.The digital driving mode adopts pulse width modulation method,which makes the human eye perceive different gray levels by changing the light and dark time of pixels.With the advantages of fast switching speed,high stability and low noise,digital drive is more suitable for silicon-based OLED micro-displays with fast photoelectric response.However,with the further improvement of the requirements for the imaging quality of micro-display,the current scanning mode for digitally driven micro-display is difficult to meet the massive data transmission caused by the improvement of resolution and refresh rate.At the same time,digital drives mostly adopt the addressing display period separated sub-field method.The distribution of the luminous sub-field is not continuous within a frame time,and the dynamic false contour phenomenon occurs when the moving picture is displayed,which seriously affects the viewing quality of the human eye.Aiming at the imaging problems such as low resolution,low refresh rate of micro-display and dynamic false contour when displaying moving pictures,this paper proposes a digital driving scanning strategy based on super-pixel technology and digital driving principle.This method uses the integral property and visual persistence property of the human eye to quickly switch between two lower resolution images in the process of display.When the switching

关 键 词：超像素 硅基OLED微显示器 数字驱动 动态假轮廓 微显示控制器 

分 类 号：TN27[电子电信—物理电子学]