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:
Sep. 16, 2008
Filed:
Jul. 11, 2003
Holger Mönch, Vaals, NL;
Holger Mönch, Vaals, NL;
Koninklijke Philips Electronics, N.V., Eindhoven, NL;
Abstract
A projection system having a projection display (), at least one light source (), and a sensor means for sensing and compensating for changes in the luminous flux emitted by the at least one light source () is described. The sensor means comprises in this case at least one sensor arrangement () for sensing components (M) of the light from the light source () that are directed into a region surrounding an entering face of an optical component () of the projection system. It has been found that there is a very good correlation between these components (M) of the light from the light source () and those other components (I) of the light that actually reach the projection display (), which means that by controlling a power supply unit () for the light source () and/or a driver unit () driving the projection display () in a suitable manner it is possible very effectively to suppress fluctuations in brightness that occur as a result of, for example, unstable arc discharges.