Projection device and drive circuit module thereof

A projection device, the projection device comprising an illumination system, a light valve, and a projection lens, wherein:

• the illumination system is configured to provide an illumination light beam, wherein the illumination system comprises a light source unit and a drive circuit module, the drive circuit module is configured to drive the light source unit to allow the light source unit to provide at least one light beam, the illumination light beam comprises the at least one light beam, and the light source unit has a minimum operating voltage value;
• the drive circuit module comprises a power supply unit and a bypass circuit, wherein:
• the power supply unit has an output end and a ground end, and comprises an output capacitor, the output capacitor is coupled between the output end and the ground end, the output end is coupled to the light source unit, and the power supply unit is configured to provide a drive voltage to the output end;
• the bypass circuit is coupled between the output end and the ground end;
• in response to the power supply unit stopping to provide the drive voltage, the bypass circuit provides a discharge path for electrical energy of the output capacitor to discharge and stores part of the electrical energy from the output capacitor, allowing a voltage value at the output end to decrease to a first voltage value;
• the first voltage value is lower than the minimum operating voltage value;
• the light valve is disposed on a transmission path of the illumination light beam and is configured to convert the illumination light beam into an image light beam;
• and
• the projection lens is disposed on a transmission path of the image light beam and is configured to project the image light beam out of the projection device.