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:
Nov. 20, 1990
Filed:
Mar. 03, 1989
Kazunori Tatsuda, Mie, JP;
Masaaki Kobayashi, Mie, JP;
Mitsuru Masuda, Mie, JP;
Hiroshi Kamogawa, Mie, JP;
Zenichiro Hara, Nagasaki, JP;
Nobuo Terazaki, Nagasaki, JP;
Shunichi Futatsuishi, Nagasaki, JP;
Norihiro Ichikawa, Nagasaki, JP;
Shiji Iwata, Hyogo, JP;
ISE Electronics Corporation, Ise, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A light source display tube arranged in matrix form in one plane as a unit element to constitute a large screen display device, where a stray path for electrons emitted from the cathode is eliminated, and concentration of the electric field of the control grid disturbing the electron flow is prevented, thereby pseudo light emission is prevented and electrical trouble is minimized in simple fashion.