Digital convergence apparatus

Details Digital convergence apparatus Digital convergence apparatus

1996-08-30

1998-11-10

Young, Brian K.

Coded data generation or conversion

Digital code to digital code converters

31536812, H03M 700

Patent

active

058350292

ABSTRACT:
NTSC convergence adjusting data corresponding to a plurality of portions on a display screen is stored in a data storage section in advance. Convergence adjusting data is stored in a field memory in a NTSC scanning mode. Adjusting data transferred to the memory is supplied to a vertical interpolation circuit, and interpolation adjusting data between the adjusting points is created using the plurality of adjusting data and interpolation coefficients. Data output from the vertical interpolation circuit is A/D-converted, and supplied to a deflection coil through a low pass filter as a convergence correction signal. In a PAL scanning mode, PAL convergence adjusting data is created with use of NTSC convergence adjusting data by a control microcomputer so as to be stored in the frame memory.

REFERENCES:
patent: 5194783 (1993-03-01), Ogino et al.
patent: 5272421 (1993-12-01), Kimura et al.
Takashi, "Full Digital Convegence System for HDTV," IEEE Transactions on Consumer Electronics 37 (1991) Aug., No. 3, NY, US, pp. 555-559. 183917 A (Mitsubishi), Jul. 23, 1993.
Patent Abstracts of Japan, vol. 12, No. 106 (E-596), Apr. 6, 1988 & JP 62 234488 A (NEC Home Electronics), Oct. 14, 1987.

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