Patent ID: 9035567
Filing Date: 2015-05-19
Classification: H05B

Abstract:
1. A light-emitting diode driving apparatus comprising: a rectifying circuit that can be connected to AC power supply and rectifies an AC voltage of the AC power supply to provide a rectified voltage; an LED portion that includes first and second LED sections serially connected to the output side of said rectifying circuit, each of the first and second LED sections including at least one LED device; a third LED section that includes at least one LED device serially connected to said second LED section; an LED driving portion that controls a current flowing in said LED portion; a charging/discharging capacitor that is connected in parallel to said LED portion; a capacitor charging path that is connected to said charging/discharging capacitor whereby charging said charging/discharging capacitor; a capacitor discharging path that is connected to said charging/discharging capacitor whereby discharging said charging/discharging capacitor; a capacitor charging constant current portion that is connected on said capacitor charging path and adjusts a capacitor charging current to a constant current; a first portion that is connected in parallel to said second LED section, and controls the flowing current amount in said first LED section; a second portion that is connected in parallel to said third LED section, and controls the flowing current amount in said first and second LED sections; a fourth portion that is connected serially to said third LED section, and controls the flowing current amount in said first, second and third LED sections; a first current control portion that controls said first portion; a second current control portion that controls said second portion; a fourth current control portion that controls said fourth portion; and a current detection portion that detects a current detection signal based on the amount of a current flowing in an output line serially connected from said first LED section to said third LED section, wherein when the rectified voltage applied to said LED portion becomes high, said charging/discharging capacitor is charged with the charging current through said charging path, and