Light source current adjustment device and method for projection device

A light source current adjustment device of a projection device, coupled to a light source of the projection device, wherein the light source current adjustment device comprises a light source driving circuit, a current monitoring circuit and a control circuit, wherein

• the light source driving circuit generates a driving current based on a direct current;
• the current monitoring circuit is coupled between the light source driving circuit and the light source to monitor the driving current and output a monitoring signal;
• and
• the control circuit is coupled to the light source driving circuit and the current monitoring circuit, receives the monitoring signal from the current monitoring circuit, and controls the light source driving circuit to adjust the driving current according to the monitoring signal, the current monitoring circuit provides an adjusted driving current from the light source driving circuit to the light source.