Patent ID: 9351366
Filing Date: 2016-05-24
CPC Classification: H05B,Y02B

Claim Text:
1. An isolation dimmer circuit structure comprising: a control circuit module provided between a positive terminal and a negative terminal of a DC power supply, the control circuit module including an input end for receiving a sensing signal and an output end for outputting a control signal; an optocoupler including an input end connected to the output end of the control circuit module, the optocoupler further including two output ends connected to input ends of a light source power supply circuit, output ends of the light source power supply circuit being connected to a light source, wherein the optocoupler receives and converts the control signal from the control circuit module into an operating signal to be outputted, the operating signal is then received by the light source power supply circuit to generate different outputs that allow changes in the brightness of the light source; and a protection circuit including a first resistor, a second resistor, a first diode, a second diode and a third diode, wherein one end of the first resistor is connected to the positive terminal of the DC power supply, while the other end of the first resistor is connected to the anode of the first diode at a node A, the cathode of the first diode is connected to a first terminal of a control input end, the second resistor is provided between the node A and the input end of the control circuit module, the cathode of second diode is connected to the positive terminal of the DC power supply, while the anode of the second diode is connected to a second terminal of the control input end, the cathode of third diode is connected to the input end of the control circuit module, while the anode of the third diode is connected to the second terminal of the control input end.