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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.:

US 3950671 B1

PDFFull Text
Date of Patent:
Apr. 13, 1976

Filed:

Mar. 14, 1974

Beam mislanding correcting system for color cathode ray tube

Applicant:
Inventors:

Koji Ichigaya, Toda, JA;

Hiromasa Machida, Mitaka, JA;

Masayuki Sudoh, Tokyo, JA;

Masami Mizuno, Yokohama, JA;

Yoriyoshi Awata, Tokyo, JA;

Assignee:

Sony Corporation, Tokyo, JA;

Attorneys:

Eslinger; Lewis H.

Sinderbrand; Alvin

Primary Examiner:

Maynard R Wilbur

Assistant Examiner:

T M Blum

Int. Cl.
CPC ...
H01J / ; H01J / ;
U.S. Cl.
CPC ...
315368 ; 315370 ; 315401 ;
Abstract

A system for compensating for mislanding of electron beams on the screen of a color cathode ray tube as a result of thermal expansion of a beam selecting structure in the tube comprises electromagnetic devices provided on the tube for producing respective magnetic fields by means of a current supplied thereto so as to change the paths of the electron beams passing through the beam selecting structure, and a circuit for supplying to the electromagnetic devices a current varying in response to a difference between the temperature of the beam selecting structure and the ambient temperature about the tube. The circuit for supplying a current to the electromagnetic devices may desirably include two temperature responsive elements, such as, variable resistors, respectively responding to variations in the temperature of the beam selecting structure and to variations in the ambient temperature about the tube, and preferably being connected in series across a voltage source with a connection point between the variable resistors being connected to the base electrode for controlling the current flowing through the collector-emitter path of the transistor to the electromagnetic devices.

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Ichigaya, Koji. (1976). Beam mislanding correcting system for color cathode ray tube (U.S. Patent No. 3950671). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/3950671

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