The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 08, 2008
Filed:
Dec. 22, 2003
Holger Moench, Vaals, NL;
Carsten Deppe, Aachen, DE;
Xaver Riederer, Aachen, DE;
Eelco Gerben Visser, Best, NL;
Nicolaas Hubertina Gerardus Reijnders, Wijchen, NL;
Holger Moench, Vaals, NL;
Carsten Deppe, Aachen, DE;
Xaver Riederer, Aachen, DE;
Eelco Gerben Visser, Best, NL;
Nicolaas Hubertina Gerardus Reijnders, Wijchen, NL;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
The invention relates to a method of representing a video image based on a video signal by means of a projector which comprises an image display device and a high-pressure gas discharge lamp, which lamp is supplied with a square-wave alternating current (I, I) on which a current pulse (P, P, P, P) is superimposed before each phase reversal. According to the invention, the alternating current (I, I) is superimposed with a second current pulse (P, P, P, P, P, P) of the same polarity. A simple attunement of the alternating current frequency to the image frequency without image artifacts is made possible by the second pulses (P, P, P, P, P, P).