Invention Grant
- Patent Title: LED lighting apparatus with improved flicker index
- Patent Title (中): 具有改善闪烁指数的LED照明设备
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Application No.: US14557250Application Date: 2014-12-01
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Publication No.: US09538599B2Publication Date: 2017-01-03
- Inventor: Hye-man Jung
- Applicant: Seoul Semiconductor Co., Ltd.
- Applicant Address: KR Ansan-si
- Assignee: Seoul Semiconductor Co., Ltd.
- Current Assignee: Seoul Semiconductor Co., Ltd.
- Current Assignee Address: KR Ansan-si
- Agency: H.C. Park & Associates, PLC
- Priority: KR10-2014-0152694 20141105
- Main IPC: H05B37/00
- IPC: H05B37/00 ; H05B33/08

Abstract:
A sequential driving type alternating current (AC) LED lighting apparatus includes a rectification unit connected to an alternating current (AC) power source and outputting a first rectified voltage as a first drive voltage to a light-emitting diode (LED) light-emitting unit through full-wave rectification of an AC voltage, and an LED drive controller configured to detect an LED drive current flowing through the LED light emitting unit or a constant current switch connected to the LED light emitting unit and configured to control sequential driving based on the detected LED drive current. The LED drive controller is configured to set an LED drive current in each of operation sections, such that a difference between light output of the LED light-emitting unit in each of the operation zones does not exceed a predetermined light output deviation.
Public/Granted literature
- US20160128153A1 LED LIGHTING APPARATUS WITH IMPROVED FLICKER INDEX Public/Granted day:2016-05-05
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