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:
Mar. 31, 2009
Filed:
Jun. 06, 2004
Adrianus Johannes Stephanes Maria DE Vaan, Eindhoven, NL;
Adrianus Johannes Stephanes Maria De Vaan, Eindhoven, NL;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
An illumination system includes a light guide having an entrance face, an exit face and an aperture in which a light source can be arranged Various elements are arranged in the light guide to increase the angle of light beams incident in the light guide with respect to the optical axis of the system and to create a homogeneous illumination at the exit face of the light guide. With this arrangement, the length of a given light guide is reduced, making the illumination system smaller, lighter and more compact with even illumination and a high optical efficiency. The illumination system can be included in a display system.