Communications: electrical – Systems – Portable self-contained
Patent
1976-07-26
1978-06-13
Trafton, David L.
Communications: electrical
Systems
Portable self-contained
G06K 1520
Patent
active
040952169
ABSTRACT:
A line interlaced video signal having odd and even alternating fields produces an alphanumeric character display in the form of a dot matrix character, each matrix location comprising segments of two next adjacent lines in the display. To improve the resolution of the characters, diagonals are detected and partly filled to provide a rounded effect. Two parallel-in serial-out shift registers are used, one of the shift registers having an associated input buffer store. A binary word representing dot information for one row of a character is read out from a dot matrix character generator ROM and loaded into one of the shift registers. On even (odd) fields the ROM output for the previous (succeeding) row is read and loaded into the other shift register. The last two bits of the two shift registers are compared to detect diagonals in the character information and used to modify the video signal to lengthen the leading or trailing edge of the corresponding dot to produce the rounded character.
REFERENCES:
patent: 3573789 (1971-04-01), Sharp et al.
patent: 3680076 (1972-07-01), Duffek et al.
patent: 3812491 (1974-05-01), Barraclough et al.
patent: 3878536 (1975-04-01), Gilliam
patent: 3969716 (1976-07-01), Roberts
Comfort James T.
Donaldson Richard L.
Grossman Rene
Texas Instruments Incorporated
Trafton David L.
LandOfFree
Method and apparatus for displaying alphanumeric data does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for displaying alphanumeric data, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for displaying alphanumeric data will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-12028