Electric lamp and discharge devices: systems – Cathode ray tube circuits – Cathode-ray deflections circuits
Patent
1992-03-02
1993-06-15
Blum, Theodore M.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Cathode-ray deflections circuits
358 10, H01J 2954
Patent
active
052202534
ABSTRACT:
A sawtooth signal generator of a D.C. coupled vertical deflection circuit is responsive, during service mode of operation, to a first signal at a D.C. level that is indicative of vertical centering. During the service mode operation, the generation of the sawtooth signal is disabled and, instead, the generator generates a D.C. signal that is D.C. coupled via a vertical deflection amplifier to a vertical deflection winding in a manner to position an electron beam at the vertical center of a display screen.
REFERENCES:
patent: 4035834 (1977-07-01), Drury
patent: 4272777 (1981-06-01), Fitzgerald
patent: 4731564 (1988-03-01), Pan et al.
Appl. SN 843,074, filed Mar. 2, 1992 in the names of Wilber et al. and entitled Resistor-Matched Deflection Apparatus for a Video Display.
Appl. SN 843,063, filed Mar. 2, 1992 in the name of K. R. Koblitz and entitled A Deflection Circuit Having a Controllable Sawtooth Generator.
Appl. SN 843,061, filed Mar. 2, 1992 in the names of Koblitz et al. and entitled Service Adjustment Arrangement for a Sawtooth Generator of a Video Display.
Appl. SN 843,075, filed Mar. 2, 1992 in the name of E. Rodriguez-Cavazos and entitled A Generator for Sawtooth Signal with Selectable Retrace Slope for a Deflection Apparatus.
Koblitz Karl R.
Rodriguez-Cavazos Enrique
Wilber James A.
Blum Theodore M.
Henig Sammy S.
Laks Joseph J.
Thomson Consumer Electronics Inc.
Tripoli Joseph S.
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