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:
May. 19, 1987
Filed:
Feb. 14, 1985
Walter Geffcken, Munich, DE;
Siemens Aktiengesellschaft, Berlin and Munich, DE;
Abstract
A flat gas discharge display includes a gas-filled envelope having mutually parallel front and rear wall plates disposed one behind the other as seen in a given viewing direction, at least one relatively large area cathode disposed on the front side of the rear wall plate, a cathodoluminescent layer and an anode disposed on the rear side of the front wall plate, a control unit disposed between the wall plates including front, central and rear grid electrodes each formed of a group of mutually parallel strip conductors, the strip conductors of the central grid electrode being column conductors, the strip conductors of the rear grid electrode being row conductors forming an orthogonal matrix together with the column conductors, and the strip conductors of the front grid electrode being tetrode conductors extended parallel to the row conductors and crossing the column conductors at given locations, the control unit being perforated with canals at the given locations where the tetrode conductors and column conductors cross each other, the row conductors each including n adjacent rows of channels, where n is an integer greater than one, and pairs of directly adjacent tetrode conductors disposed in front of different row conductors being combined to form a single strip conductor.