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:
Sep. 14, 1993
Filed:
Feb. 25, 1992
Applicant:
Inventors:
Koichi Sakurai, Hyogo, JP;
Hidenobu Murakami, Hyogo, JP;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
315-3 ; 315340 ; 313442 ; 313497 ; 313313 ;
Abstract
A flat display device includes no exposed part of an insulated substrate on the inner wall of electron pass holes for attaining a high intensity of a display screen, high operational stability of the display screen, and having a simple structure for manufacturing it easily. In a control electrode, resistive films are formed on the exposed part of an insulated body. When the electrons pass through electron pass holes, electron beams are controlled without charging the insulated substrate by the electrons.