Convergence correction apparatus for use in a color display

Details Convergence correction apparatus for use in a color display Convergence correction apparatus for use in a color display

1993-10-26

1995-03-14

Groody, James J.

Television

Video display

Cathode-ray tube

348558, 31536813, H04N 928

Patent

active

053980832

ABSTRACT:
A signal generating apparatus comprises: a scanning-line number detector (2) for detecting the number of scanning lines with receipt of a sync signal; a convergence memory (3) for storing convergence correction data; an on-screen display memory (5) for storing on-screen display data; an interpolator (4) for performing vertical interpolation of output data derived from the memories (3, 5) according to the detection signal derived from the scanning-line number detector (2); and a frame memory (6) for successively reading data elements corresponding to the individual scanning lines interpolated by the interpolator (4). The apparatus detects the number of scanning lines and generates a correction signal and a character signal through vertical processing of convergence correction data and on-screen character data.

REFERENCES:
patent: 4239142 (1980-12-01), Schonmeier et al.
patent: 4672275 (1987-06-01), Ando
patent: 4673847 (1987-06-01), Louie et al.
patent: 4999703 (1991-03-01), Henderson
patent: 5111284 (1992-05-01), Tsujihara et al.
patent: 5216497 (1993-06-01), Tsujihara et al.

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