DRIVING CIRCUIT OF LIGHT EMITTING ELEMENT AND DRIVING METHOD THEREOF

摘要

A driving circuit of a light emitting device and a driving method thereof are provided to increase the lifespan of the light emitting device and improve efficiency of the light emission by maintaining a heating temperature of the light emitting device. A control signal generating unit(10) generates a control signal in order to control the size of the output current outputted from the light emitting device. A constant voltage generator(20) applies an operating voltage of the control signal generating unit. A current controller(30) controls the magnitude of the voltage so that the difference between a power value consumed by the light emitting device and a reference power value is between - 0.5% and + 0.5% by offsetting the lowering of a resistance of the light emitting device due to the heating based on the control signal.