Effects of illumination conditions on preferred viewing distance of portable liquid-crystal television

This study explored the effect of TV size, light source, and ambient illumination on the preferred viewing distance of portable liquid-crystal- display televisions. Results showed that the mean preferred viewing distancewas 1389mm. TV size had significant effects on preferred viewing distance. The larger the screen size, the greater the preferred viewing distance, at around 6.7-14.7 times the width of the screen (W). Light sources revealed no significant effect on preferred viewing distance. The effect of ambient illumination on preferred viewing distance was significant. The higher the ambient illumination was, the longer the preferred viewing distance.