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:
Feb. 23, 1999
Filed:
Mar. 12, 1997
Bernd Roessner, Rosengarten, DE;
Wilfried Sprenger, Issendorf, DE;
Daimler-Benz Aerospace Airbus GmbH, Hamburg, DE;
Abstract
A reading lamp system for passengers especially in an aircraft is equipped with at least one central light source preferably including a cool light lamp, the light of which is supplied through light guides such as fiber optical conductors, to individual reading lamps having a housing to which the respective light guide is connected. A liquid crystal film is positioned in the lamp housing between the light exit of the respective light guide and a lens that provides a light output from the reading lamp housing. The liquid crystal film is controllable in its light transparency by a passenger through a switch, whereby the passenger can make the liquid crystal film opaque to switch off the reading lamp or transparent to switch on the lamp. A dimmer may also be arranged to provide intermediate light level illuminations.