Title: Method and apparatus for optimizing color purity in a color kinescope

Abstract: A set of auxiliary deflection coils are placed on opposite sides of a multibeam color television picture tube having a deflection yoke and color purity adjustment apparatus. The tube is operated to cause a raster to be scanned. The auxiliary coils are energized to cause the beams to be deflected to the left from their normal beam landing sites by a predetermined amount during at least one vertical field and to the right for the nominal beam sites by a predetermined amount during at least one vertical field in order to simulate beam landing errors caused by factors present in the television tube use environment. Color purity is then adjusted in the presence of the simulated beam landing errors.

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Inventors: Kelly, William R. (Lancaster, PA, US)
Barbin, Robert L. (Lancaster, PA, US)

Application Number: 783478
Filing Date: 1977-03-31
Publication_date: 1979-01-30
Assignee: RCA Corporation (New York, NY)
Primary Class(es): 348/190
Other Classes:
US Patent Ref:

3916437	Oct, 1975	Barbin	358/10.
4001877	Jan, 1977	Simpson	358/10.

Other Refs:
Primary Examiner: Martin, John C.
Assistant Examiner: Psitos, Aristotelis M.
Attorney: Whitacre; Eugene M., Rasmussen; Paul J., Laks; Joseph