Patent ID: 8908000
Filing Date: 2014-12-09
Classification: B41J,G03G,G06K,H05B

Abstract:
1. A light-emitting device comprising: a plurality of light-emitting chips each having a plurality of light-emitting elements; an enable signal supply unit that transmits a plurality of enable signals, each enable signal being transmitted in common to the light-emitting chips belonging to each of M (M is an integer of two or more) groups into which the plurality of light-emitting chips are divided, each enable signal selecting a light-emitting chip in each group as a target for lighting up a light-emitting element selected from the light-emitting elements set as a control target; a write signal supply unit that transmits a plurality of write signals, each write signal being transmitted in common to light-emitting chips belonging to each of N (N is an integer of two or more) classes into which the light-emitting chips in each of the M groups are classified, each write signal selecting the light-emitting chip in each class as the target for lighting up the light-emitting element selected from the light-emitting elements set as the control target; and a light-up signal supply unit that transmits a plurality of light-up signals, each light-up signal being transmitted in common to the light-emitting chips belonging to each of the M groups, each light-up signal supplying power for lighting up the light-emitting element in the light-emitting chip selected by the enable signal and selected by the write signal, wherein the light-up signal supply unit and the enable signal supply unit transmit the light-up signals and the enable signals to the M groups, respectively, at transmission time points shifted from each other among the M groups, and wherein the light-up signal supply unit and the enable signal supply unit transmit the light-up signals and the enable signals to the M groups, respectively, with phases being shifted by 360/M degrees from each other among the M groups.