Apparatus and method for driving light source of projector

Details Apparatus and method for driving light source of projector Apparatus and method for driving light source of projector

2008-07-08

2008-07-08

Sever, Andrew T (Department: 2851)

Optics: image projectors

Lamp control

C353S122000, C349S061000

Reexamination Certificate

active

07396134

ABSTRACT:
An apparatus and a method for driving the light source of a projector are provided. The apparatus includes an adjustment unit, a lamp driver, a phase lock loop (PLL) and a mercury lamp. The adjustment unit provides an enabling signal and regulates the frequency of the enabling signal according to an indication signal. The lamp driver provides a driving signal according to the enabling signal and an input voltage, wherein the frequency of the driving signal is varied with the frequency of the enabling signal. The PLL provides a synchronized driving signal according to the driving signal and a vertical synchronization signal, wherein the synchronized driving signal is phase-synchronous with the frame field of the projector. The mercury lamp serves as the light source of the projector according to the synchronized driving signal.

REFERENCES:
patent: 5331253 (1994-07-01), Counts
patent: 5854662 (1998-12-01), Yuyama et al.
patent: 2003/0184506 (2003-10-01), Janssen et al.
patent: 2006/0126021 (2006-06-01), Vanlier et al.
patent: 2006/0139578 (2006-06-01), Nakagawa et al.

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