Patent ID: 7778562
Filing Date: 2010-08-17
Classification: G06K

Abstract:
1. An electronic circuit comprising: a dot gathering operation circuit that operates, based on dot gathering control data, non-emission time data indicating time for which each light emitting element is to be retained in a non-emission state from the starting point of the emission period, the dot gathering control data indicating whether to make each of plural light emitting elements emit light at the starting point side, terminal point side, or in the middle of the starting point and the terminal point in an emission period corresponding to a 1-pixel pitch in a sub scanning direction, or to make each light emitting element emit light at both the starting point side and terminal point side; a delay time measurement circuit that calculates, by adding skew data indicating a skew quantity in each light emitting element and the non-emission time data output from the dot gathering operation circuit, delay time to be set before starting light emission by each light emitting element, and outputs a prescribed signal after a lapse of the delay time; and an emission instruction circuit that outputs, based on emission time data indicating an emission time in each light emitting element, to a light emitting element drive circuit an emission instruction signal from the point in time the prescribed signal is output from the delay time measurement circuit up until the elapse of the emission time indicated by the emission time data.