Patent ID: 11906890
Assignee: HISENSE LASER DISPLAY CO., LTD
Field: Optics (Instruments)
Classification: CPC G  H | IPC G  H

Claim 5:
6. The laser projection apparatus according to claim 5, wherein the driving sub-circuit includes a control unit, a pre-driving unit and a switch unit;
the control unit is electrically connected to the main control circuit, the timing control sub-circuit and the pre-driving unit; the pre-driving unit is further electrically connected to the switch unit; the switch unit is further electrically connected to the three-phase motor;
the control unit is configured to provide a pre-driving signal to the pre-driving unit according to the second startup pulse width modulation signal and the timing control signal or according to the operating pulse width modulation signal and the timing control signal;
the pre-driving unit is configured to amplify the pre-driving signal and output the amplified pre-driving signal to the switch unit; and
the switch unit is configured to provide the drive current to the three-phase motor according to the amplified pre-driving signal.