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. 03, 2002
Filed:
Jan. 11, 2001
Applicant:
Inventors:
Hugo Johan Cornelissen, Eindhoven, NL;
Marinus Josephus Jakobus Dona, Eindhoven, NL;
Horst Greiner, Aachen, DE;
Assignee:
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 6/10 ;
U.S. Cl.
CPC ...
G02B 6/10 ;
Abstract
In an illumination (or front light) system based on an optical waveguide for e.g. LCD devices, Moiré artefacts due to internal reflections in the optical waveguide are minimized by using microstructures (grooves) which have a curved shape or are pre-arranged at an angle.