Patent ID: 11967273
Assignee: MIANYANG HKC OPTOELECTRONICS TECHNOLOGY CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H  Y | IPC G

Claim 2:
3. The control circuit according to claim 2, wherein the control sub-circuit comprises: a second operational amplifier and a switching device; and
a non-inverting input terminal of the second operational amplifier is connected with an output terminal of the detection circuit for receiving the first voltage, and an inverting input terminal of the second operational amplifier is configured for receiving the second voltage; and
an output terminal of the second operational amplifier is connected to a control terminal of the switching device, a first terminal of the switching device is connected to a second preset terminal, a second terminal of the switching device is grounded, the first terminal of the switching device is connected to an enable terminal of the drive chip, and the second preset terminal is configured for providing a voltage for the switching device.