Abstract
New display devices such as liquid-crystal displays, plasma displays, and organic LED displays, and high-definition (HD) TV formats may make a change in flicker visibility on displays. The flicker visibility for various viewing distances and light-emission duty ratios using a 44-inch diagonal flat light source was examined for this paper. As the viewing distance is reduced, the perceptible limit luminance of flicker decreases and the perceptible limit frequency increases. This implies that flicker is more perceptible for HDTV. The results show that a lower light-emission duty ratio, which is used to reduce the motion blur, requires a higher field frequency to prevent flicker. We proposed the empirical equations for the flicker-free field frequency and light-emission duty ratio as functions of the luminance. We found from these equations that more than 75 Hz of field frequency is required to prevent flicker when the duty ratio is 50% and the luminance is 300 cd/m2. In addition, more than an 81% duty ratio is required when the luminance is 300 cd/m2, the viewing distance is 3 H, and the field frequency is 60 Hz.
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