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:
Jul. 02, 1985
Filed:
Sep. 22, 1983
Walter Geffcken, Munich, DE;
Burkhard Littwin, Hohenschaftlarn, DE;
Siemens Aktiengesellschaft, Berlin and Munich, DE;
Abstract
Flat picture reproduction device for displaying color pictures based upon three basic colors, containing a vacuum-tight envelope with an electrode matrix formed of row conductors and column conductors arranged in front of the row conductors. It has cutouts at the intersections of the row and column conductors and divides the interior of the envelope into a rear and a front chamber. A planar electron source is located in the rear chamber, elongated deflection electrodes located in the front chamber, between adjacent column conductors. The odd-numbered deflection electrodes are connected to a first voltage source, and the even-numbered ones to a second voltage source. Strip-shaped layers of luminescent phosphor is applied to the front side of the envelope wall adjacent one another in a periodic color sequence parallel to the column conductors. An addressing circuit is provided which has means for scanning the row conductors sequentially, and means for providing the column conductors, during a row scanning time interval and in the sequence of colors, with white dot information potentials in a manner that electrons supplied by the electron source can pass selectively through the cutouts formed in the electrode matrix, and means for applying different potentials to the deflection electrodes so that the electrons entering the front chamber are directed to the respective luminescent strips having the correct color.