Patent ID: 7323831
Filing Date: 2008-01-29
Classification: B60Q,H05B,Y02B

Abstract:
1. An illumination device comprising: an illumination unit which glows when current flows through a load thereof; at least one instruction unit for instructing the illumination unit to glow; a PWM signal generating unit which generates a plurality of PWM signals based on that the instruction unit instructed the illumination unit to glow, the load of the illumination unit being divided into a plurality of portions which are respectively connected with each other in parallel and connected with the PWM signal generating unit, the plurality of PWM signals being generated for currents flowing through the plurality of divided portions of the load of the illumination unit; and a time difference setting unit for setting a time difference between one of the plurality of PWM signals and an other thereof based on that the instruction unit instructed the illumination unit to glow.