Patent ID: 9035988
Filing Date: 2015-05-19
Classification: B41J

Abstract:
1. A light source driving device which drives a plurality of light emitting parts provided in a light source to emit a plurality of light beams based on image information, comprising a plurality of driving circuits configured to drive the plurality of light emitting parts, each driving circuit of the plurality of driving circuits comprising: a signal generation circuit that generates a modulation signal to control a light emitting intensity of the corresponding light emitting part based on the image information; a detection circuit that detects a light emitting status of the corresponding light emitting part; a light emitting circuit that outputs a driving signal to the corresponding light emitting part to emit a light beam in accordance with the modulation signal and adjustment data obtained based on the light emitting status of at least one of the plurality of light emitting parts; and a holding circuit comprising plural memory units to store plural light emitting statuses of the light emitting part, in accordance with a clock signal, and output measurement data, wherein the plural light emitting statuses are detected and output by the detection circuit sequentially, and the holding circuit registers synchronously in accordance with the clock signal the sequentially obtained light emitting statuses detected by the detection circuit from a single light emitting part amongst the plurality of light emitting parts such that the holding circuit holds, at one instant in time, the plural light emitting statuses of the single light emitting part detected at different points in time, wherein the adjustment data for each light emitting part is determined based on the measurement data, generated from the light emitting statuses held in the holding circuit, of two or more of the plurality of light emitting parts.