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. 21, 1978
Filed:
Apr. 13, 1976
Pierre Genequand, Geneva, CH;
Didier Joyeux, Petit-Lancy, CH;
Battelle Memorial Institute, , CH;
Abstract
A video cathode tube having a matrix of low emission threshold field effect emitters oriented to emit toward a luminescent layer. A first system of mutually insulated conductive paths is arranged along rows of emitters with the emitters in any row electrically connected to a corresponding conductive path of the first system. A second system of mutually insulated conductive paths is disposed in contact with the luminescent layer and extends in front of columns of the emitters. A first bank of contacts individually connected to respective conductive paths of the first system are sequentially energized to a first potential, and a second bank of contacts individually connected to respective conductive paths of the second system are sequentially energized to a second potential. A control grid connectable to a voltage source is interposed between the matrix of emitters and the second system of conductive paths. By modulating the potentials of the contacts with electrical signals representing an image when the grid is properly biased, luminous points on the luminescent layer will be sequentially developed opposite successive emitters to display on the luminescent layer an image represented by the electrical signals.