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:
Jan. 25, 2005
Filed:
Jan. 15, 2002
Nicolas Berthou, Aze, FR;
Jean-marc Breda, Paris, FR;
Nicolas Berthou, Aze, FR;
Jean-Marc Breda, Paris, FR;
Thales, Paris, FR;
Abstract
The present invention relates to a backlighting device, having several brightness levels, for a transmission display screen (). The device comprises light sources placed in a case () between a translucent front wall formed by a diffuser screen () and a rear wall (). The light sources, selected according to the desired brightness level, are mosaics () of light-emitting diodes () that are placed immediately behind the diffuser screen with, for the highest brightness level, a first mosaic () of light-emitting diodes that provides daytime illumination and with, for the lowest brightness level, a second mosaic () of light sources that supplies night-time illumination.