P‐2.4: Comprehensive Contrast Ratio Evaluation Method of VR Products

Abstract

Contrast ratio is the ratio of the brightest part to the darkest part of the image, which can reflect the picture hierarchy. In VR head‐mounted display (HMD), many scenes need to realistically simulate rooms or night environments. High contrast ratio helps to better display details in dark scenes, giving people the ultimate sense of immersion. There are many ways to measure contrast ratio, but still no effective standard to evaluate this indicator. In particular, many VR HMD adopt the emerging solution of folded optical path pancake. Due to the refraction and reflection of light on different interfaces, the pancake module will cause "ghosting", then affect the visual experience. Therefore, it becomes our focus to evaluate the contrast ratio of pancake VR HMD. We present a way to evaluate the contrast ratio of VR HMD by a near‐eye display measurement system, and compares the measurement results of different test methods. It can systematically and objectively evaluate the contrast of VR head‐mounted display devices and provide a useful reference for VR device evaluation.