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:
Jun. 18, 1991
Filed:
Aug. 29, 1989
Applicant:
Inventor:
Katsuyoshi Tamura, Mobara, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ; H04N / ;
U.S. Cl.
CPC ...
313479 ; 313478 ; 358247 ;
Abstract
A cathode-ray tube has an electrically conductive film formed over the surface of the panel portion of the tube, a transparent, electrical insulating layer formed on the conductive film and an electrode unit formed on the electrical insulating layer. The electrode unit is connected with a common potential line. A capacitor formed between the anode of the cathode-ray tube and the conductive film and a capacitor formed by the conductive film insulating layer and the electrode unit are electrically in series connection as viewed from a source for the voltage to be applied to the anode.