DRIVING CIRCUIT FOR LIGHT EMITTING ELEMENT, LIGHT EMITTING DEVICE USING SAME, AND DISPLAY APPARATUS

摘要

LED terminals (P3a-P3c) are respectively provided for light emitting units (4a-4c) and connected to second terminals of the light emitting units (4a-4c) corresponding thereto. Current sources (30a-30c) are respectively provided for the LED terminals (P3a-P3c) and supply adjustable driving currents (ILEDa-ILEDc) to the light emitting units (4a-4c) corresponding thereto via the LED terminals (P3a-P3c) corresponding thereto. A reference voltage source (34) generates reference voltage (Vx) corresponding to the driving current (ILED). A control circuit (40) controls a DC/DC converter (104) so that the lowest voltage among the voltages of the LED terminals (P3a-P3c) matches the reference voltage (Vx).