Patent ID: 8711444
Filing Date: 2014-04-29
Classification: G03G,H04N,H05B

Abstract:
1. A light-source control device comprising: a light source having a load current applied thereto, the light source including a first light emitter for emitting light and a second light emitter for emitting light by exciting material therein in response to the light emitted by the first light emitter; a control unit configured to control the load current applied to the light source so that a rise transition time and a fall transition time of the load current applied to the light source are nearly equal to each other; a constant current maintaining unit configured to maintain a source current, input via the light source and the control unit from a power supply, at a constant magnitude, the source current being based on the load current; and a switching unit configured to switch the source current input, via the light source and the control unit, to the constant current maintaining unit at a designated duty ratio and cycle.