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. 15, 1985
Filed:
Sep. 10, 1982
Seigo Kokufukata, Tokyo, JP;
Tetsuya Sekido, Tokyo, JP;
Abstract
A temperature compensation circuit in a pickup tube device comprising a pickup tube, a bias lighting device provided at the front surface of the pickup tube for irradiating a bias light, a circuit for generating a shading compensation signal, and a circuit for supplying a black gate pulse, comprises a temperature compensation signal generating circuit for generating a temperature compensation signal for cancelling variation in a signal current component from the pickup tube due to variation in the bias light obtained from the bias lighting device which is in accordance with temperature variation, a compensation signal obtaining circuit for obtaining a compensation signal by multiplexing the temperature compensation signal generated by the temperature compensation signal generating circuit with the shading compensation signal, and a mixing circuit for mixing the multiplexed compensation signal, the output signal of the pickup tube, and the black gate pulse.