Patent ID: 9131585
Filing Date: 2015-09-08
Classification: H05B

Abstract:
1. A light source control device that controls multiple light sources connected in parallel, the light source control device comprising: a constant current supplying part that supplies a predetermined current to said multiple light sources; a switching part capable of interrupting supply of said current from said constant current supplying part to said multiple light sources independently; a failure detecting part that determines whether a short-circuit failure occurs in any of said multiple light sources based on respective currents flowing in said multiple light sources while said current is supplied from said constant current supplying part to said multiple light sources; a current sensing part that senses the respective amounts of currents flowing in said multiple light sources while said current is supplied from said constant current supplying part to said multiple light sources; a short-circuit specifying part that specifies a light source belonging to said multiple light sources and subjected to a short-circuit failure based on a result of the determination by said failure detecting part and the current amounts sensed by said current sensing part; and a controller that makes said switching part interrupt supply of a current to said light source specified by said short-circuit specifying part, said controller making said constant current supplying part supply a light source belonging to said multiple light sources and not specified by said short-circuit specifying part with a current not exceeding a current responsive to the number of such light sources not specified.