Light emitting diode illumination apparatus and control method thereof

摘要

Disclosed are a light emitting diode illumination apparatus and a control method thereof. The light emitting diode illumination apparatus includes a light source that includes a plurality of light emitting diode channels including one or more light emitting diodes, and emits light by application of a rectified voltage obtained by converting an AC voltage, and a control circuit that selectively provides current paths according to a change in a level of the rectified voltage through a plurality of switching circuits connected to the light emitting diode channels, and controls pulse widths of control pulses provided to the switching circuits such that an current supplied to the light source of each channel follows a waveform of the rectified voltage.

主权项

1. A light emitting diode illumination apparatus comprising:
a light source that includes a plurality of light emitting diode channels including one or more light emitting diodes, and emits light by application of a rectified voltage obtained by converting an AC voltage; and a control circuit that selectively provides current paths according to a change in a level of the rectified voltage through a plurality of switching circuits connected to the light emitting diode channels, resets control pulses provided to the switching circuits at a time point at which the current paths are changed, and controls pulse widths of control pulses provided to the switching circuits such that a current supplied to the light source follows a waveform of the rectified voltage.