Methods of generating correction factor signals for cathode...

Details Methods of generating correction factor signals for cathode... Methods of generating correction factor signals for cathode...

H - Electricity

04

N

375/16, 355/3, 3

H04N 9/09 (2006.01) H04N 9/28 (2006.01)

Patent

CA 1113610

IMPROVEMENTS IN METHODS OF GENERATING CORRECTION FACTOR SIGNALS FOR CATHODE RAY TUBES ABSTRACT A method of convergence correction in a three beam colour cathode ray tube dividing the screen into a plurality of discrete areas. Digital values for convergence factor signals are derived for a predetermined number of the discrete areas and a spreading algorithm is used to derive digital values for the remaining areas. The resulting digital values are stored in a digital store and used to provide convergence correction factor signals during opera- tion of the tube.

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