Method of convergence measurement for a color picture tube and a

Details Method of convergence measurement for a color picture tube and a Method of convergence measurement for a color picture tube and a

1983-10-19

1986-06-03

Shepperd, John W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

315368, H04N 1702

Patent

active

045933090

ABSTRACT:
The convergence of a color picture tube is measured by first indicating a prescribed pattern in a reference position on the picture tube. The image of a pattern for each light beam color in the picture tube is picked-up, and then this display position of the pattern is shifted. An image of the pattern in the shifted position is then picked-up for each beam color in the tube which gives a second image pick-up data. The average values of the data obtained from the non-shifted and shifted pattern for each light beam color is used to determine the convergence of the color picture tube.

REFERENCES:
patent: 4254432 (1981-03-01), Nakahata
patent: 4316211 (1982-02-01), Mackey et al.
patent: 4364079 (1982-12-01), Pons
patent: 4387394 (1983-06-01), Powell
patent: 4441120 (1984-04-01), Gerritsen

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