Patent ID: 8319371

Claim:
An electronic device comprising: a light emitting unit that provides backlight to a liquid crystal display unit; a communication unit that transmits video data to an external device; a control unit that controls a current flowing from a DC-DC converter to the light emitting unit; a resistor that is connected in parallel to the light emitting unit; a first switching unit that connects the light emitting unit and the DC-DC converter or disconnects between the light emitting unit and the DC-DC converter; and a second switching unit that connects the light emitting unit and the resistor or disconnects between the light emitting unit and the resistor, wherein the control unit controls a current flowing from the DC-DC converter to the light emitting unit so as to change an output voltage of the DC-DC converter from a first voltage to a second voltage which is lower than the first voltage, and wherein if the output voltage of the DC-DC converter is changed from the first voltage to the second voltage, the control unit causes the second switching unit to connect the light emitting unit and the resistor and causes the first switching unit to disconnect between the light emitting unit and the DC-DC converter.