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:
Dec. 04, 2007
Filed:
Sep. 17, 2003
Adrianus Johannes Stephanes Maria DE Vaan, Eindhoven, NL;
Adrianus Johannes Stephanes Maria De Vaan, Eindhoven, NL;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
A scrolling colour projection system comprising a lamp () with a pulsed drive current () and a colour scanner () for generating a light beam () with a plurality of scrolling colour fields, which is arranged to illuminate a display device () to produce a projection of an image generated by the display device. The system further includes a filtering element () arranged in the light path between the lamp and the projected image, and the transmission of the filtering element () is synchronized with the lamp current so as to cancel an intensity peak in the lamp flux. The filtering element thus effectively removes the impact of the current pulse on the light intensity, resulting in a constant intensity in the projected image, and avoiding any interference patterns.