Patent ID: 9565728
Date: 2017-02-07
CPC Classifications: G09G,H04N,H05B

Claim:
1. An LED drive device for driving an LED in a switching mode, comprising: a booster circuit for supplying an electric current to the LED; a switching element connected with the downstream side of the LED; a first voltage-driving resistance and a second voltage-driving resistance which are provided so as to branch off between the booster circuit and the LED and are serially connected; and a switching section for, (i) during an on period in which an on/off signal specifying turning on/off of a switching element specifies turning on of the switching element, feeding back, to the booster circuit via the switching element, an electric current flowing to the LED, and (ii) during an off period in which the on/off signal specifies turning off of the switching element, feeding back, to the booster circuit from between the first voltage-dividing resistance and the second voltage-dividing resistance, a voltage obtained by dividing an output voltage of the booster circuit.