Laser projection device

A laser projection device, comprising:

• a laser light source, comprising three laser assemblies emitting lasers of different colors;
• and
• a laser light source driving unit, connected to the laser light source, and comprising:
• a display control circuit, configured to:
• output, based on three primary color components of an image to be displayed, three pulse width modulation (PWM) signals corresponding to the three laser assemblies, and output three enabling signals corresponding to the three laser assemblies;
• power supply driving assemblies, connected to the display control circuit and configured to receive the PWM signals outputted from the display control circuit, wherein the power supply driving assemblies include three power supply driving assemblies connected to the three laser assemblies in a one-to-one correspondence;
• and
• laser driving assemblies, comprising three laser driving assemblies connected to the three power supply driving assemblies in a one-to-one correspondence,
• wherein the display control circuit is configured to transmit an enabling signal corresponding to each of the laser assemblies to a corresponding one of the power supply driving assemblies when transmitting a PWM signal corresponding to each of the laser assemblies;
• each of the power supply driving assemblies is configured to load a driving voltage to a corresponding one of the laser driving assemblies according to a voltage of a received PWM signal, when a received enabling signal is at an active potential;
• and
• each of the laser driving assemblies is configured to drive a corresponding one of the laser assemblies to emit light according to the driving voltage.