| 摘要 |
<p>PURPOSE:To contrive the miniaturization of the title circuit and the reduction in weight by operating an LED array simultaneously for light emitting and light receiving. CONSTITUTION:LEDs constituting an LED array 10 are distributed for the light emitting and the light receiving, and for example, by lighting up every other light emitting LED, the original is lit up. Next, to receive the reflected light, by using a shift register 7, and successively conducting an input switch group 9, a photoelectric current from the LED connected to the input switch group 9 is outputted to a switch common terminal.</p> |
