Data display apparatus with character refresh buffer and row buf

Details Data display apparatus with character refresh buffer and row buf Data display apparatus with character refresh buffer and row buf

1984-09-28

1987-03-10

Brigance, Gerald L.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340748, 340799, 340731, G09G 116

Patent

active

046493794

ABSTRACT:
A data display apparatus employs a raster scan cathode ray tube (1), a character refresh buffer (2) and three character row buffers (5,6,15) to address a character generator (3) in conjunction with a slice counter (4) or offset slice counter (18) under control of an events control module (20). This enables data within a partition on the CRT to be scrolled smoothly (scan-line-by-scan-line) and characters of different height (requiring different numbers of scans) to be displayed on the same row of the CRT.

REFERENCES:
patent: 3641559 (1972-02-01), Hogan et al.
patent: 4278973 (1981-07-01), Hughes et al.
patent: 4284989 (1981-08-01), Parsons
patent: 4298931 (1981-11-01), Tachiuchi et al.
patent: 4399435 (1983-08-01), Urabe
patent: 4437093 (1984-03-01), Bradley
patent: 4489317 (1984-12-01), Shiga
IBM Technical Disclosure Bulletin, Dec. 1980, p. 2897, vol. 23, No. 74; W. J. Nestork et al., "Buffer System for Data Display".

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