Precise subpixel luminance extraction method for De-Mura of AMOLED displays

IF 3.7 2区工程技术 Q1 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE

Displays Pub Date : 2024-11-14 DOI:10.1016/j.displa.2024.102889

Zhong Zheng, Zhaohua Zhou, Ruipeng Chen, Jiajie Liu, Chun Liu, Lirong Zhang, Lei Zhou, Miao Xu, Lei Wang, Weijing Wu, Junbiao Peng

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引用次数: 0

Abstract

Currently, Mura defects have a significant impact on the yield of AMOLED panels, and De-Mura plays a critical role in the compensation. To enhance the applicability of the subpixel luminance extraction method in De-Mura and to address inaccuracies caused by aperture diffraction limit and geometric defocusing in camera imaging, this paper proposes a precise extraction method based on effective area. We establish the concept of the effective area first and then determine the effective area of subpixel imaging on the camera sensor by incorporating the circle of confusion (CoC) caused by aperture diffraction limits and geometric defocusing. Finally, more precise luminance information is obtained. Results show that, after compensation, the Mura on the white screen is almost eliminated subjectively. Objectively, by constructing normalized luminance curves for subpixels in Mura regions, the standard deviation indicates that our method outperforms the traditional whole-pixel method, improving uniformity by approximately 50%.

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用于 AMOLED 显示器去村效应的精确亚像素亮度提取方法

目前，Mura 缺陷对 AMOLED 面板的良品率有很大影响，而 De-Mura 在补偿中起着至关重要的作用。为了提高亚像素亮度提取方法在去村斑中的适用性，并解决相机成像中光圈衍射极限和几何散焦造成的误差，本文提出了一种基于有效面积的精确提取方法。我们首先建立了有效面积的概念，然后结合光圈衍射极限和几何散焦造成的混淆圈（CoC），确定摄像机传感器上子像素成像的有效面积。最后，获得更精确的亮度信息。结果表明，经过补偿后，白色屏幕上的穆拉现象在主观上几乎被消除。客观上，通过构建 Mura 区域子像素的归一化亮度曲线，标准偏差表明我们的方法优于传统的全像素方法，均匀度提高了约 50%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Displays 工程技术-工程：电子与电气

CiteScore

4.60

自引率

25.60%

发文量

138

审稿时长

92 days

期刊介绍： Displays is the international journal covering the research and development of display technology, its effective presentation and perception of information, and applications and systems including display-human interface. Technical papers on practical developments in Displays technology provide an effective channel to promote greater understanding and cross-fertilization across the diverse disciplines of the Displays community. Original research papers solving ergonomics issues at the display-human interface advance effective presentation of information. Tutorial papers covering fundamentals intended for display technologies and human factor engineers new to the field will also occasionally featured.