Patent ID: 9237627
Filing Date: 2016-01-12
CPC Classification: G09G,H05B

Claim Text:
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 failure detector that monitors voltages at 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 drive current controller that generates a plurality of drive current control signals; and a plurality of drive current generators, each drive current generator of the plurality of drive current generators supplying a drive current to a corresponding one of the plurality of light-emitting element strings based on a corresponding one of the plurality of drive current control signals; and 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, wherein each of the plurality of drive current generators independently adjusts a drive current of the corresponding one of the plurality of light-emitting element strings.