Patent ID: 8591041

Claim:
A method for driving a high-pressure gas discharge lamp of a projector system, the method comprising the steps of: providing a color light beam of a basic color from a lamp, during each of a sequence of successive projection intervals and to supply said color light beam to a light valve device having a plurality of light valves, wherein the lamp is driven by a lamp current, and during said projection interval the light valves of the light valve device are controlled to have each light valve provide a respective desired light integral over said projection interval, wherein during a portion of one projection interval of the sequence of successive projection intervals, a magnitude of the lamp current is temporarily reduced from a basic lamp current value to a reduced lamp current value for at least a time period during which all light valves are configured to be controlled for said one basic color, wherein the portion of the one projection interval is less than the entire projection interval, and wherein the reduction of the lamp current magnitude is carried out in subsequent steps.