Computer users often suffer heavy work loads seeing display devices, because they have to gaze on the bright and small characters and complex figures displayed with high density and high resolution at relatively close distances.
Therefore, there are many problems on human factors we have to consider in designing display devices. This article introduces several basic problems covering the relationship between visual effects and display device characteristics such as the spatial frequency response of devices, brightness, contrast and color of displayed images. Furthermore, problems relating visual fatigue are analysed and methods to reduce them are described.
