Invention Grant
- Patent Title: LED lighting apparatus capable of color temperature control
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Application No.: US16890271Application Date: 2020-06-02
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Publication No.: US11109461B2Publication Date: 2021-08-31
- Inventor: Keith Hopwood , Sung Ho Jin , Hyung Jin Lee , Sang Wook Han
- 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
- Main IPC: H05B45/395
- IPC: H05B45/395 ; H05B45/20 ; H05B45/44 ; F21V23/04

Abstract:
An LED lighting apparatus capable of color temperature control includes a color temperature controller to receive a color temperature selection signal and output first and second control signals; a LED driver connected a plurality of LED groups; and a LED selection circuit including a first switch connected to a first node to which a rectified voltage is applied and receiving the first control signal, a first LED group selectively connected to the first node by the first switch, a second LED group connected in scales with the first LED group, a third LED group selectively connected to the first node by the first switch, a fourth LED group connected in series with the third LED group, and a second switch for selectively connecting the output terminal of the second LED group or the fourth LED group to the LED driver by receiving the second control signal.
Public/Granted literature
- US20200337129A1 LED LIGHTING APPARATUS CAPABLE OF COLOR TEMPERATURE CONTROL Public/Granted day:2020-10-22
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