Patent ID: 7215523

Claim:
A projector, comprising: a light generating source; a control unit outputting a control voltage, wherein, the control voltage is at a first level when the light generating source is off, and after the light generating source has been switched on for a predetermined period of time, the control voltage changes to a second level from the first level; a non-lamp-igniter electrical circuit; an integrated circuit for controlling the non-lamp-igniter electrical circuit; and a protecting circuit selectively coupling a power from a power source to the integrated circuit in response to the control voltage, wherein when the control voltage is at the first level, the protecting circuit isolating the power from the integrated circuit; and when the control voltage is at the second level, the protecting circuit coupling the power from the power source to the integrated circuit, so that the integrated circuit receives the power through the protecting circuit after the light generating source has been switched on for a predetermined period of time.