US 9,439,258 B2 · Control circuit of LED lighting apparatus

Abstract

Provided is a control circuit of an LED lighting apparatus, which is capable of reducing the occurrence of a flicker while performing lighting. The control circuit of the LED lighting apparatus may include a charge and discharge module charged by a rectified voltage and discharging LED channels, and control one or more of charge timing, a charged voltage, and discharge timing of the charge and discharge module such that the charge and discharge module supplies a voltage to the LED channels at least during a control period at which the amount of current supplied to the LED channels is the smallest. Thus, the occurrence of a flicker in the LED lighting apparatus can be improved.

Claims21

Dependent claims

A control circuit of an LED lighting apparatus divided into a plurality of LED channels, comprising:

a current control circuit configured to provide a current path corresponding to sequential emissions of the LED channels in response to a rectified voltage;
and
a flicker reduction circuit comprising a charge and discharge module charged by the rectified voltage and discharging the LED channels, and configured to control one or more of charge timing, a charged voltage, and discharge timing of the charge and discharge module such that the charge and discharge module supplies a voltage to the LED channels at least during a control period at which the amount of current supplied to the LED channels is the smallest.

Dependencies are inferred from the claim text.

Control circuit of LED lighting apparatus

Life of this patent

Control circuit of LED lighting apparatus

Life of this patent

Abstract

Claims21