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1. (WO2018157539) LIGHT EMITTING DIODE CIRCUIT HAVING COLOR TEMPERATURE ADJUSTMENT FUNCTION

Pub. No.:    WO/2018/157539    International Application No.:    PCT/CN2017/094031
Publication Date: Sat Sep 08 01:59:59 CEST 2018 International Filing Date: Tue Jul 25 01:59:59 CEST 2017
IPC: H05B 33/08
Applicants: LEEDARSON LIGHTING CO.,LTD
漳洲立达信光电子科技有限公司
Inventors: WANG, Qiyuan
王其远
HUANG, Wenchang
黄温昌
CHEN, Guangai
陈光爱
CHEN, Huiwu
陈慧武
Title: LIGHT EMITTING DIODE CIRCUIT HAVING COLOR TEMPERATURE ADJUSTMENT FUNCTION
Abstract:
A light emitting diode circuit having color temperature adjustment capability. The light emitting diode circuit comprises a first LED lamp string (101), a resistor (501), and a second LED lamp string (102). The first LED lamp string has a first color temperature. The resistor is connected in series with the first LED lamp string. The second LED lamp string has a second color temperature. The first LED lamp string is connected in parallel with the second LED lamp string. The second color temperature is higher than the first color temperature. When the sum of current input to the first LED lamp string and the second LED lamp string is from low to high, the comprehensive color temperatures of the first LED lamp string and the second LED lamp string are increased. The light emitting diode circuit has a color temperature adjustment function, can also adjust color temperatures by means of parallel-series connection combination, and can also simulate the color temperatures of natural light, so as to satisfy requirements on light color changes of an illumination apparatus by people in life.