PROJECTION SYSTEM AND ITS OPERATING METHOD

摘要

A method of operating a projection system in which the arc is stabilized by superposing a pulse current on a DC lamp current and, at the same time, the pulse current is superposed on the DC lamp current in synchronism with a specific segment so that flicker can be suppressed while minimizing gradation disorder. In the method of operating a projection system for projecting an image onto a screen (7) by passing a light (F) emitted from a DC-operated high-pressure discharge lamp (1) sequentially through a plurality of split color segments (3a), ..., a pulse current (P) is superposed on the DC lamp current (R) of the high-pressure discharge lamp (1) in synchronism with at least one specific color segment.