The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 28, 2021
Filed:
Nov. 12, 2020
Applicant:
Xiamen Leedarson Lighting Co., Ltd, Fujian, CN;
Inventors:
Assignee:
XIAMEN LEEDARSON LIGHTING CO., LTD, Xiamen, CN;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H05B 45/32 (2020.01); H05B 45/325 (2020.01); H05B 47/11 (2020.01);
U.S. Cl.
CPC ...
H05B 45/325 (2020.01); H05B 47/11 (2020.01);
Abstract
A lighting apparatus includes a light source, a power converter, an optical coupler, a light sensor, a frequency detector and a controller. The light source includes a LED module. The light switch is connected to the LED module in series. The light switch selectively turns on and turning off the LED module according to a second PWM signal. The power converter converts an alternating current power source with a working frequency to a direct current power. The optical coupler controls the power converter to work in a constant current mode or a constant voltage mode according to a first PWM signal.