US Patent No. 10,172,208

METHOD FOR ADJUSTING COLOR TEMPERATURE OF LED IN SINGLE LIGHT FIXTURE


Patent No. 10,172,208
Issue Date January 01, 2019
Title Method For Adjusting Color Temperature Of Led In Single Light Fixture
Inventorship Wei-Lun Chao, Zhongshan (CN)
Yung Lung Cheng, Zhongshan (CN)
Assignee ZHONGSHAN LUXMODE INDUSTRIAL CO., LTD., Zhongshan, Guangdong (CN)

Claim of US Patent No. 10,172,208

1. A method for adjusting a color temperature of an LED in a single light fixture, comprising providing a light fixture which includes at least two light-emitting modules, wherein the light-emitting modules respectively have a loop and a color temperature, are respectively controlled by different switches, and have different color temperatures;the switch element is selectively turned on or off, and the brightness of the corresponding light-emitting modules can be controlled, so that light emitted by the light fixture at least has more than three different color temperatures;
a number of the light-emitting modules is two for a first light-emitting module and a second light-emitting module; and
the switch element includes a first switch, electrically connected to the first light-emitting module, a second switch, electrically connected to the second light-emitting module, a first MOS transistor, a second MOS transistor, a first resistor, a second resistor, a third resistor, and a fourth resistor, wherein:
a drain of the first MOS transistor is electrically connected to the first light-emitting module;
a source of the first MOS transistor is electrically connected to one end of the third resistor;
one end of the first resistor is respectively electrically connected to the other end of the third resistor and a gate of the first MOS transistor;
the other end of the first resistor is electrically connected to the first switch;
a drain of the second MOS transistor is electrically connected to the second light-emitting module;
a source of the second MOS transistor is electrically connected to one end of the fourth resistor;
one end of the second resistor is respectively electrically connected to the other end of the fourth resistor and a gate of the second MOS transistor; and
the other end of the second resistor is electrically connected to the second switch.