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. 15, 2009
Filed:
Feb. 21, 2003
Christoph Gerard August Hoelen, Eindhoven, NL;
Cornelis Jojakim Jalink, Utrecht, NL;
Nicola Bettina Pfeffer, Eindhoven, NL;
Jelle Hilbrand Schuurmans, Eindhoven, NL;
Stefan Marcus Verbrugh, Eindhoven, NL;
Christoph Gerard August Hoelen, Eindhoven, NL;
Cornelis Jojakim Jalink, Utrecht, NL;
Nicola Bettina Pfeffer, Eindhoven, NL;
Jelle Hilbrand Schuurmans, Eindhoven, NL;
Stefan Marcus Verbrugh, Eindhoven, NL;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
An illumination system, preferably for illumination in a car, comprising at least one plain or slightly curved, solid light guide () made of transparent material, said light guide receiving light from a light () source and being provided with means () for extracting light from said light guide, the means for extracting light from said light guide have. Reflecting surfaces () the slopes of which are varied as a function of the position of the extracting means in the light guide as well as the position of a reading plane, so as to direct the light flux to a desired reading plane position. Preferably the illumination system a laminated structure of light guide layers, said layers being formed of a light guide layer for diffuse homogeneous illumination () and at least one light guide layer () for spot illumination of a reading plane.