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

Claim 8:
9. A method for controlling one or more light emitting diodes, the method comprising:
receiving a rectified voltage by a current regulation circuit coupled to an anode of the one or more light emitting diodes;
receiving the rectified voltage by a control circuit;
generating a control signal based at least in part on the rectified voltage by the control circuit;
receiving the control signal from the control circuit by the current regulation circuit;
allowing 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 allowing 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 resistor including a first resistor terminal and a second 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 anode of the one or more light emitting diodes.