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为了研究环境亮度、背景色度变化以及干扰(镜面反射、漫反射和眩光)对平视显示器可读性的影响,通过对最小可辨差异(PJND)理论的研究,结合平视显示器及应用环境特点,建立了基于PJND的平视显示器可读性评价模型。仿真及实验结果表明:可用PJND值来评价平视显示器的可读性;为满足可读性,随着环境亮度变大,亮度对比度应该逐渐减小,低亮度环境下对亮度对比度的要求大于高亮度环境;背景色度与目标色度差异越大,可读性对亮度对比度的要求越低;环境亮度不变、干扰值变大时,可通过增大亮度对比度来满足可读性,干扰值超过一定范围,可通过物理遮挡来满足可读性。
In order to study the influence of ambient brightness, background chromaticity variation and interference (specular reflection, diffuse reflection and glare) on the readability of the HUD, this paper studies the theory of PJND and combines the characteristics of HUD and application environment, A PJND based readability evaluation model for head-up display was established. Simulation and experimental results show that the PJND can be used to evaluate the readability of the head-up display. To meet the readability, as the ambient brightness becomes larger, the contrast of the brightness should be gradually reduced, and the brightness contrast needs to be greater than that of the high brightness Environment; the greater the difference between the background chroma and the target chroma, the lower the readability requirements for the brightness contrast; the same the ambient brightness and the larger the interference value, the readability can be satisfied by increasing the brightness contrast, and the interference value exceeds A range that can be read by physical occlusion.