Patent ID: 11937350
Assignee: ON-BRIGHT ELECTRONICS (SHANGHAI) CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A system for controlling one or more light emitting diodes, the system comprising:
a current regulation circuit configured to receive a rectified voltage and coupled to an anode of the one or more light emitting diodes, the one or more light emitting diodes including the anode and a cathode; and
a control circuit configured to receive the rectified voltage and generate a control signal based at least in part on the rectified voltage;
wherein the current regulation circuit is configured to:
receive the control signal from the control circuit;
allow a current to flow through the one or more light emitting diodes if the control signal is at the first logic level, the current being larger than zero in magnitude; and
not allow the current to flow through the one or more light emitting diodes if the control signal is at the second logic level;

wherein the current regulation circuit includes:
an amplifier including a first amplifier input terminal, a second amplifier input terminal, and an amplifier output terminal;
a transistor including a drain terminal, a gate terminal, and a source terminal; and
a third resistor including a fifth resistor terminal and a sixth resistor terminal;
wherein:
the drain terminal of the transistor is configured to receive the rectified voltage;
the gate terminal of the transistor is coupled to the amplifier output terminal of the amplifier; and
the source terminal of the transistor is coupled to the fifth resistor terminal of the third resistor and the second amplifier input terminal of the amplifier.