Patent ID: 9170521
Filing Date: 2015-10-27
Classification: B41J,G01J,G02B,G03G,G06K,H04N

Abstract:
1. A light beam detection circuit, comprising: a detection signal generation section configured to receive a light beam for scanning of a scanning target with one optical sensor, and generate a detection signal corresponding to an amount of received light; a reference signal output section configured to output a reference signal that is in proportion to a light-amount control signal of a light-emitting element that emits the light beam; and a synchronizing signal generation section configured to compare the detection signal generated by the detection signal generation section with the reference signal output from the reference signal output section to generate a synchronizing signal to determine a position to start scanning of the scanning target with the light beam; wherein a value of the reference signal is an intermediate value of a waveform of an output signal of the one optical sensor.