中文摘要：

目的 研究环境照度、手机屏幕亮度对视觉搜索绩效的影响,并提出在室外不同的环境照度下手机屏幕亮度的最优值设置参数.方法 采用视觉搜索任务,对16名被试在室外不同环境照度（10 klux、20 klux、30 klux）以及不同手机屏幕亮度条件下的视觉搜索绩效、主观评价以及眼睛疲劳度进行了比较.结果 在室外不同环境照度下手机屏幕亮度最优值设置不同,当环境照度为10 klux时,手机屏幕亮度的最优值是354 cd/m2;环境照度为20 klux时,手机屏幕亮度的最优值是734 cd/m2;环境亮度为30 klux时,手机屏幕亮度的最优值是1 375 cd/m2.结论 环境照度和手机屏幕亮度的最优值是线性变化的,当环境照度较低时屏幕亮度最优值较低,当环境照度为中等水平时屏幕亮度最优值为中等水平,当环境照度为较高水平时屏幕亮度最优值也较高.

英文摘要：

Objective To investigate the effect of environment illumination and mobile screen brightness on the performance of visual search task,and give optimal values of the phone screen brightness setting parameters under different environment illumination.Method In this study,visual search task,behavioral performance,subjective evaluation and eye fatigue indicators were used to examine the impact of the environmental illumination on cell phone screen.Result The experiment showed that when the ambient illumination was 10klux,the brightness value was 354-412cd/m2; when the ambient illumination was 20klux the brightness value was 734cd/m2; when the ambient illumination was 30klux the brightness value was 1375cd/m2.Conclusion Environmental illumination and the optimal value of the cell phone screen brightness indicates a linear trend.When the ambient illumination is low,the screen brightness is low.When the ambient illumination is the medium level,the screen brightness is the medium level.When the ambient illumination is the higher level the screen brightness is the higher level.