Optimizing microdisplay requirements for pancake VR applications,Journal of the Society for Information Display

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Optimizing microdisplay requirements for pancake VR applications
Journal of the Society for Information Display ( IF 1.7 ) Pub Date : 2023-03-31 , DOI: 10.1002/jsid.1199
En‐Lin Hsiang ₁ , Zhiyong Yang ₁ , Shin‐Tson Wu ₁

Affiliation

Virtual reality (VR) devices use imaging optics to magnify the microdisplay images for providing an immersive viewing experience. A microdisplay is preferred to have high-resolution density and high dynamic range to meet the demanding requirements of human vision system (HVS), for example, visual acuity >60 pixels per degree and grayscale depth >10 bits. However, increasing resolution density and dynamic range often lead to a reduced optical efficiency and sophisticated fabrication process of the microdisplay panels. In this paper, we systematically analyze the image degradation mechanisms of VR devices caused by both imaging optics and microdisplay and find that the image degradation caused by imaging optics significantly unleash the requirements of microdisplay, such as contrast ratio, number of local dimming zones, and resolution density. For example, aberrations of the imaging optics reduce the resolution density requirement of the microdisplay, and stray light of the imaging optics relieves the contrast ratio requirement of the microdisplay. These results help prevent excessive design of microdisplay, for example, mini-light-emitting diode (LED) backlit liquid-crystal displays (LCDs), organic LEDs, or micro-LEDs, in a pancake lens-based VR headset.

中文翻译：

优化 pancake VR 应用的微显示器要求

虚拟现实 (VR) 设备使用成像光学来放大微显示图像，以提供身临其境的观看体验。微型显示器优选具有高分辨率密度和高动态范围以满足人类视觉系统（HVS）的苛刻要求，例如，视力> 60像素/度和灰度深度> 10位。然而，分辨率密度和动态范围的增加通常会导致微显示面板的光学效率降低和复杂的制造工艺。在本文中，我们系统地分析了由成像光学和微显示器引起的 VR 设备的图像退化机制，发现由成像光学引起的图像退化显着释放了微显示器的要求，例如对比度，局部调光区的数量，以及分辨率密度。例如，成像光学器件的像差降低了微型显示器的分辨率密度要求，而成像光学器件的杂散光降低了微型显示器的对比度要求。这些结果有助于防止微显示器的过度设计，例如基于薄饼透镜的 VR 耳机中的微型发光二极管 (LED) 背光液晶显示器 (LCD)、有机 LED 或微型 LED。

更新日期：2023-03-31

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