面向数字驱动式硅基微显示器的双帧分权融合扫描  

Dual-frame decentralized fusion scanning for digital drive on-silicon microdisplays

作　　者：杨宇臣 季渊[1] 陈文栋[1] 穆廷洲 张春燕[1] 冉峰[1] Yang Yuchen;Ji Yuan;Chen Wendong;Mu Tingzhou;Zhang Chunyan;Ran Feng(Microelectronic Research&Development Center,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

出　　处：《光电工程》2020年第11期14-20,共7页Opto-Electronic Engineering

基　　金：国家自然科学基金资助项目(61674100,61774101);军民融合项目(2019-jmrh1-kj37)。

摘　　要：当micro LED处于正向工作区时,难以精确调节它们的电压来获得不同的发光亮度;且当micro LED/OLED工作时,会较长时间处于闭合状态,导致人眼观察到的图像显示亮度变差。为解决以上问题,本文提出一种双帧分权融合扫描策略,通过调节micro LED/OLED导通时间来获得不同亮度。该方法先对数据位重新分权,使导通时间分散插入到闭合时间内,然后将分权后的各数据位权值进行双帧融合,最后重新定义数据位的扫描顺序。并根据所提出的扫描策略设计了一款面向数字驱动式硅基微显示器的扫描控制器。结果表明:本文提出的双帧分权融合扫描策略可以精确调节micro LED/OLED的发光亮度,提高人眼观察到图像显示亮度。该扫描策略与其它扫描策略相比,扫描效率提升至93.75%,场频提升至2040 Hz,扫描时钟频率为102.36 MHz,且同时减小了扫描数据带宽。最后通过测试证明了扫描控制器的可行性。When the microLED is in the forward working direction,it is difficult to precisely adjust its voltage to obtain different brightness.Moreover,when the microLED/OLED is turned on,they will be in a closed state for a long time,causing the image display brightness to be deteriorated by the human eye.In order to solve these problems,this paper proposes a dual-frame decentralized fusion scanning strategy to achieve different brightness by adjusting the micro LED/OLED on-time.Firstly,the method de-weights the data bits and inserts their on-times into the closed time.Then the data bit weights are double-frame fused after decentralization.Finally,the scanning order of the data bits is redefined.According to the proposed scanning strategy,we designed a scanning controller to drive digital on-silicon microdisplay.The results show that the dual-frame decentralized fusion scan proposed in this paper can accurately adjust the luminance of microLED/OLED and improve the brightness of the image observed by human eyes.Compared with other scanning strategies,the scanning strategy improves the scanning efficiency to 93.75%,the field frequency is increased to 2040 Hz,the scanning clock frequency is 102.36 MHz,and the scanning data bandwidth is reduced.The feasibility of the scan controller is proved by testing at last.

关 键 词：发光亮度 双帧分权融合 数字驱动式硅基微显示器 扫描控制器 扫描效率 

分 类 号：TN27[电子电信—物理电子学]