Patent ID: 8258706
Filing Date: 2012-09-04
Classification: H05B

Abstract:
1. An LED drive circuit that receives an alternating voltage to drive an LED, comprising: a current remove portion that removes a current from a current supply line that supplies an LED drive current to the LED, wherein if an input current to the LED drive circuit is an unnecessary current, the LED does not light because of current removal by the current remove portion, the unnecessary current is a current that can be supplied to an LED and is unnecessary to the LED for a time span in which it is necessary to keep the LED from lighting, wherein if the input current to the LED drive circuit turns into the LED drive current from the unnecessary current, the current remove portion decreases the amount of current removed, the LED drive current is a current that is supplied to an LED for a time span in which it is necessary to keep the LED lighting, and wherein the unnecessary current is smaller than the LED drive current.