LED LIGHTING APPARATUS WITH IMPROVED TOTAL HARMONIC DISTORTION IN SOURCE CURRENT

摘要

The LED lighting apparatus includes: a rectification block; an LED block including a first light emitting group and a second light emitting group; a charging/discharging block configured to charge electric charges in a charging period, and discharge electric charges in a discharging period; a driving control unit configured to determine a voltage level of a rectified voltage, controls a path selection switch to connect the rectification block to the LED block and controls the charging/discharging block to charge electric charges in the charging period, and controls the path selection switch to connect the rectification block to a ground and controls the charging/discharging block to discharge electric charges from the charging/discharging block to the LED block in the discharging period; and a path selection switch configured to connect the rectification block to the LED block in the charging period, and connect the rectification block to the ground in the discharging period.

主权项

1. An LED lighting apparatus comprising:
a rectification block configured to rectify an AC voltage to a DC rectified voltage; an LED block including a first light emitting group and a second light emitting group each including one or more LEDs; a charging/discharging block configured to charge electric charges in a charging period, and discharge electric charges in a discharging period such that the LED block emits light; a driving control unit configured to determine a voltage level of the rectified voltage output from the rectification block, controls a path selection switch to connect the rectification block to the LED block and controls the charging/discharging block to charge the charging/discharging block with electric charges, when the voltage level of the rectified voltage enters the charging period, and controls the path selection switch to connect the rectification block to a ground and controls the charging/discharging block to discharge electric charges from the charging/discharging block to the LED block, when the voltage level of the rectified voltage enters the discharging period; and a path selection switch configured to connect the rectification block to the LED block in the charging period, and connect the rectification block to the ground in the discharging period.