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:
Aug. 17, 2010
Filed:
Aug. 25, 2005
Renatus Hendricus Maria Sanders, Eindhoven, NL;
Johannus Wilhelmus Weekamp, Eindhoven, NL;
Renatus Hendricus Maria Sanders, Eindhoven, NL;
Johannus Wilhelmus Weekamp, Eindhoven, NL;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
The present invention relates to a laser projection system () having means for reducing the coherence of a generated laser beam () in order to reduce the occurrence of annoying speckle artifacts in images produced by the system. Coherence is reduced by letting the laser beam () pass through a transparent cell () comprising first (A) and second (B) immiscible fluids having different refractive indices. The fluids are displaced in the cell, preferably using an electrowetting technique. The cell () may thus be realized as an electrowetting lens, which is driven with a pseudo random driving signal.