US Patent No. 11,032,890

DIMMABLE LAMP SWITCH CONTROL DEVICE


Patent No. 11,032,890
Issue Date June 08, 2021
Title Dimmable Lamp Switch Control Device
Inventorship Fuxing Lu, Fujian (CN)
Rongtu Liu, Fujian (CN)
Assignee Xiamen PVTECH Co., Ltd., Fujian (CN)

Claim of US Patent No. 11,032,890

1. A dimmable lamp switch control device, comprising:two conductive pin sets being respectively formed at both ends of the lamp and electrically connected to a AC power supply;
a rectifier bridge module being connected to the conductive pin sets to input at least one voltage signal;
a dimming signal identification and control circuit module having an input and an output, being identifying a dimming signal and controlling the dimmable lamp;
a filter circuit module connected to the rectifier bridge module for outputting a smooth DC voltage, the filter circuit module being provided with a circuit guard unit and a backflow prevention steady voltage filter circuit module, the circuit guard unit being connected to the output of the backflow prevention steady voltage filter circuit module;
a power supply circuit module connected to the output of the backflow prevention steady voltage filter circuit module and a input of the dimming signal identification and control circuit module;
a buck-boost constant current module connected to the filter circuit module and stepping down or boosting the filtered DC voltage, and connecting to the dimming signal identification and control circuit module for dimming control; and
an anti-electricity shock detection control circuit module connected between the rectifier bridge module and the filter circuit module, and having a signal control unit, the rectifier bridge module controlling the buck-boost constant current module through the signal control unit of the anti-electricity shock detection control circuit module, the anti-electricity shock detection control circuit module reducing the PWM signal of the buck-boost constant current module based on the output signal of the rectifier bridge module.