| 摘要 |
PURPOSE:To reduce the flickering of the display for the artificial variation of the sensed light by making the light adjustment correspondence operation in the shift to the light reduction slow, in the prescribed display with the display luminance corresponding to the detection value. CONSTITUTION:When incident light supplied into an optical sensor 11 reduces, the display luminance in a display part 3 is not allowed to immediately follow the reduction and not changed to the prescribed brightness, and when the disposal in a processing part 2 is slow, for example, the responce time is delayed, or the degree of reduction of light is reduced to the half, the display luminance is gradually shifted to a prescribed value. Since the artificial cut-off of the light supplied to the sensor 11 is momentary, the variation of the display luminance in the display part 3 is made gentle. |
