Moving-body detecting image sensor

摘要

Two photodetectors are formed which output electric signals based on the detection of light at light receiving sections disposed apart in space. The output signal of one of the photodetectors is delayed and a first pulse signal is generated. A second pulse signal having no delay is generated according to the detection signal of the other of the photodetectors. A signal is output when the pulse signals are input overlappingly. According to whether the signal is output, the movement direction and speed of a moving body which moves between the light receiving sections are detected.