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. 30, 1981
Filed:
Nov. 28, 1978
Yasuaki Watanabe, Kasukabe, JP;
Yukio Okabe, Noda, JP;
Shinichi Kojima, Higashimurayama, JP;
Mitsuya Sato, Kokubunji, JP;
Hitachi, Ltd., Tokyo, JP;
Victor Company of Japan, Limited, Tokyo, JP;
Abstract
In a color signal reproducing circuit, a red color difference signal from a color demodulator circuit is corrected by a blue color difference signal, and the blue color difference signal is corrected by a luminance signal. The phase of a color subcarrier signal to be supplied to the color demodulator circuit is controlled by the corrected red color difference signal during reception of a VIR signal, and the level of a color signal to be supplied to the color demodulator circuit is controlled by the corrected blue color difference signal. The controls of hue and color saturation are facilitated by the use of the corrected color difference signals. It is also made possible to deliver from the color demodulator circuit, color difference signals which match the fluorescence characteristics of a color picture tube.