Subjective test results, which are concerned with the ease in TV watching when displayed in the small size and the sensitivity to noise disturbance, are presented. The optimum viewing distance is about 9H, where H is the picture height, and it is independent of the screen size. The optimum conditions of screen size and viewing distance are 13 inches and 1.2 m, respectively. The degree of disturbance due to random noise depends on the viewing angle, and the S/N ratio when the degree of disturbance becomes equal decreases about 6.6 dB/dec. as the viewing distance becomes far.
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