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:
Mar. 22, 1988
Filed:
Jan. 21, 1986
Applicant:
Inventors:
Seiichi Kanema, Nishitama, JP;
Shigeo Tsujioka, Higashiyamato, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
340701 ; 358 10 ; 358 27 ; 358 28 ;
Abstract
A detector for detecting the radiation state of a display surface is disposed in a cathode ray tube in order to improve the color reproducibility of a color display. Revise order signals as standard signals are applied to obtain a difference signal between the radiation quantity of a color signal that must be displayed originally and the output signal of the detector, and a circuit for compensating for the radiation order signal is disposed in a path through which the radiation order signal is applied to the cathode ray tube.