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:
Jan. 26, 1988
Filed:
Mar. 27, 1986
Applicant:
Inventors:
Yuichirou Kimura, Yokohama, JP;
Michitaka Osawa, Fujisawa, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
358171 ; 358 34 ; 358172 ;
Abstract
A capacitor is provided between an amplifier whose output impedance is relatively high and a cathode of a cathode ray tube. A transistor is also provided having an emitter-collector path connected in parallel with said capacitor and a base electrode which is connected to a D.C. voltage source through a switch which is turned on during a horizontal retrace period and off during a horizontal scan period. A D.C. restoring operation is achieved by causing almost all of the discharge current of the capacitor to flow through the emitter-collector path, resulting in less discharge current flow through the output impedance of the amplifier.