振动条件下液晶屏汉字字高和笔划对汉字易读性的影响

Legibility of Chinese Character of Different Height and Stroke on Liquid Crystal Display (LCD) under Vibration.

为了探讨振动对人识别液晶屏汉字显示易读性的影响，在２１种振动条件下，两种视距（８０ｃｍ和１００ｃｍ），对四种字高（５、６、７、８ｍｍ）及五种笔划（４～５划、８划、１０划、１２划和１３划以上）汉字的易读性（认知时间和错误率）进行了实验。结果表明：在２１种振动条件下，有三种振动对液晶屏汉字识别影响较大。在四种字高中，认知时间和错误率是以７ｍｍ字高为拐点，７ｍｍ、８ｍｍ字高的认知时间和错误率明显低于５ｍｍ、６ｍｍ字高的认知时间和错误率（Ｐ＜０．０１），而７ｍｍ、８ｍｍ字高结果之间却无明显差异。五种笔划中，随笔划的增多，认知时间和错误率也随之增加，两两笔划的认知时间、错误率之间的差异均有非常显著性（Ｐ＜０．０１）。随着视距的变小，认知时间和错误率迅速下降，视距８０ｃｍ与１００ｃｍ的结果比较，Ｐ值均小于０．０１。

Legibility of Chinese characters displayed on LCD screen was studied under vibration.The results showed that vibrations of 8 Hz,0.4 m/s 2, 16 Hz,0.8 m/s 2, and 31.5 Hz,1.2 m/s 2 had very significant effects on legibility.No significant difference was found between reaction time and error rates of reading characters of 7 mm and 8 mm heights but they significantly lower than that of 5 mm or6 mm characters.Reaction time and error rates increased rapidly with the increase of strokes.Very significant changes were observed among the five types of strokes. Reaction time and error rates of reading at 80 cm distance were significantly lower than those of 100 cm (P<0.01).