US 12,238,836 B2
Lighting apparatus
Yongqiang Wu, Fujian (CN); Yangbin Xu, Fujian (CN); Guiyuan Lin, Fujian (CN); Hemu Ye, Fujian (CN); Qiqiang Lin, Fujian (CN); Yankun Li, Fujian (CN); and Zongyuan Liu, Fujian (CN)
Assigned to LEEDARSON LIGHTING CO., LTD., Fujian (CN)
Filed by LEEDARSON LIGHTING CO., LTD., Fujian (CN)
Filed on Jul. 11, 2022, as Appl. No. 17/861,898.
Claims priority of application No. 202121565499.2 (CN), filed on Jul. 9, 2021; and application No. 202121828887.5 (CN), filed on Aug. 6, 2021.
Prior Publication US 2023/0010921 A1, Jan. 12, 2023
Int. Cl. H05B 45/3725 (2020.01); H05B 45/28 (2020.01); H05B 45/325 (2020.01)
CPC H05B 45/3725 (2020.01) [H05B 45/28 (2020.01); H05B 45/325 (2020.01)] 19 Claims
OG exemplary drawing
 
1. A lighting apparatus, comprising:
a bridge circuit for rectifying an input AC power to generate a DC power;
a current source receiving the DC power to generate a driving current;
a first LED module for emitting a first light of a first color temperature;
a second LED module for emitting a second light of a second color temperature;
a switch coupled to the current source to change at least a resistance parameter corresponding to a current ratio between the first LED module and the second LED module to generate a mixed light of a mixed color temperature; and
a first resistor module and a second resistor module, wherein the first resistor module is coupled to the current source for generating a first PWM signal and a second PWM signal respectively for the first LED module and the second LED module, wherein the second resistor module is coupled to the current source for adjusting a current level of the driving current.