Optics: image projectors – Lamp control
Reexamination Certificate
2005-11-21
2010-06-08
Epps, Georgia Y (Department: 2878)
Optics: image projectors
Lamp control
C315S291000
Reexamination Certificate
active
07731370
ABSTRACT:
A projection system and a method for operating a discharge lamp are described. The protection system comprises a discharge lamp12and driving electronics14. The color wheel18serves as color filter for filtering light16emitted from lamp12to generate a light sequence20with different colors in sequential color time periods22, 22a. In between color time periods22, 22a, spoke time periods24, 24aare arranged. The driving electronics provide a lamp current I with superimposed first current pulses, which are generated in at least one of the color time periods22, 22a. In order to allow greater flexibility and be able to achieve stable arc operation and constant color point over lamp lifetime, the driving electronics14further provide second current pulses superimposed on the lamp current. The second current pulses are generated during at least one of the spoke time periods24, 24a.
REFERENCES:
patent: 6377236 (2002-04-01), Karamoto
patent: 6400511 (2002-06-01), Vanlier et al.
patent: 2001/0022692 (2001-09-01), Vanlier et al.
patent: 2002/0176055 (2002-11-01), De Vaan et al.
patent: 10319571 (2004-11-01), None
patent: 1154652 (2001-11-01), None
patent: WO03096760 (2003-11-01), None
patent: WO2004016000 (2004-02-01), None
patent: WO2004052023 (2004-06-01), None
patent: WO2004064409 (2004-07-01), None
Florian et al.; DE 10319571; Machine Translation from German to English.
Deppe Carsten
Munters Tom
Epps Georgia Y
Howard Ryan
Koninklijke Philips Electronics , N.V.
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