LED driving apparatus and lighting apparatus
AssigneeSamsung Electronics Co., Ltd.
InventorsBong Jin Lee, Kyu Cheol Kang, Kil Yoan Chung
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Abstract
A light emitting diode driving apparatus includes a rectifier, a converter, a feedback circuit, and a controller. The rectifier converts alternating current power to direct current (DC) power. The converter supplies driving power to a plurality of LEDs based on the DC power. The feedback circuit generates a feedback signal based on a current flowing in the plurality of LEDs and adjusts a magnitude of the feedback signal. The controller changes a maximum value of a current output by the converter based on the adjusted magnitude of the feedback signal.
Claims13
A light emitting diode (LED) driving apparatus, comprising:
- a rectifier to convert alternating current (AC) power to direct current (DC) power;
- a converter to supply a driving power to a plurality of LEDs based on the DC power;
- a feedback circuit to generate a feedback signal based on a current flowing in the plurality of LEDs and including an adjustment circuit to adjust a magnitude of the feedback signal;
- and
- a controller to change a maximum value of a current output by the converter based on the adjusted magnitude of the feedback signal, wherein
- the adjustment circuit includes a light emitting diode, and
- the feedback signal is adjusted by independently changing a light amount of the light emitting diode based on the current flowing in the plurality of LED.
Dependencies are inferred from the claim text.