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. 08, 2005
Filed:
Jan. 14, 2000
Frank Vollkommer, Buchendorf, DE;
Lothar Hitzschke, Munich, DE;
Frank Vollkommer, Buchendorf, DE;
Lothar Hitzschke, Munich, DE;
Abstract
A flat fluorescent lamp () has a discharge vessel () having a base plate (), a top plate () and a frame () which are connected to one another in a gas-tight fashion by means of solder (). Structures resembling conductor tracks function in the interior of the discharge vessel as electrodes (), in the feedthrough region as feedthroughs, and in the external region as external supply leads (). Flat lamps of the most different sizes can thereby be produced simply in engineering terms and in a fashion capable of effective automation. Moreover, virtually any electrode shapes can be realized, in particular optimized with regard to a uniform luminous density with a reduced drop in luminous density towards the edges of the flat lamp. At least the anodes () are covered in each case with a dielectric layer (). The lamp () is preferably operated by means of a pulsed voltage source and serves as background lighting for LCDs, for example in monitors or driver information displays.