Digital convergence apparatus

Details Digital convergence apparatus Digital convergence apparatus

1995-06-22

1997-01-07

Lee, Micheal H.

Television

Video display

Cathode-ray tube

31536811, 31536812, 348806, H04N 322, H04N 928

Patent

active

055922406

ABSTRACT:
A digital convergence apparatus using two different kinds of data to correct the convergence of odd and even scanning lines, respectively. A first memory stores data for the convergence correction corresponding to plural correction executing points aligned in the horizontal or vertical direction of a screen. A first static convergence data memory stores a first static convergence correction data for correcting the entire screen in the same direction, a second static convergence data memory stores a second static convergence correction data different from the first static convergence correction data only by an amount corresponding to the distance between the scanning lines. Selecting means select the output of the first or the second static convergence data memory according to the odd field period or the even field period. Adding means add the output of the selecting means to the data stored in the first memory. Vertical interpolating means interpolate the output of the adding means in the vertical direction, and a convergence correction coil corrects the convergence based on the output of the adding means.

REFERENCES:
patent: 4672275 (1987-06-01), Ando
patent: 5398083 (1995-03-01), Tsujihara et al.

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