Patent ID: 8878445
Filing Date: 2014-11-04
Classification: G09G,H05B

Abstract:
1. A light-emitting element driving device for driving a plurality of light-emitting element strings connected in parallel, the light-emitting element driving device comprising: a drive circuit group that includes at least two drive circuits and supplies a plurality of drive currents to drive the plurality of light-emitting element strings, respectively; a failure detector that monitors voltages at a plurality of nodes between a ground and the plurality of light-emitting element strings, and detects a failure of each light-emitting element string of the plurality of light-emitting element strings; a minimum detector that detects a minimum voltage of the voltages at the plurality of nodes and outputs a certain voltage which represents the minimum voltage; and an error amplifier that receives the certain voltage output from the minimum detector, wherein the drive circuit group independently adjusts a brightness of each of the plurality of light-emitting element strings.