Patent ID: 8371702
Filing Date: 2013-02-12
Classification: G03B,H04N

Abstract:
1. A circuit for operating an AC mercury lamp and DMD (Digital Micromirror Device) in a projection system, comprising: an image processor for receiving input video information and in response outputting a series of image data blocks and a frame synchronization signal for switching said DMD between image rendering and standby states, wherein each of said standby states results in a dark interval; a control device for receiving said frame synchronization signal and in response outputting a periodic lamp synchronization signal with a predetermined phase delay that is dependent on frame rate of said frame synchronization signal and predetermined properties of said DMD and said AC mercury lamp; at least one lamp driver for receiving said lamp synchronization signal and outputting a power signal for driving said lamp so as to alternate between a maintenance pulse level during at least a portion of said dark interval and a plateau level during said image rendering states of said DMD.