From the experiments, distance between the viewer and the display was found that there was not need to consider because it did not affect the luminosity value. The vertical viewing angle can be found an acceptable angle of θ = ± 30° with respect to the display. Also, the vertical viewing angle θ = ± 20° was observed by attenuation of too much brightness until it is observed by decay of luminance. However, the vertical viewing angle between θ = ± 30° showed a sudden intensity attenuation