Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1981-11-19
1985-06-04
Curtis, Marshall M.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
340728, 340791, 340724, G09G 116
Patent
active
045217742
ABSTRACT:
A raster-scanned CRT device includes auxiliary vertical deflection means operable during each scan line of the raster to deflect the electron beam selectively between adjacent pairs of uniformly spaced image lines on the screen. Control logic operates in response to video information representing an image to be displayed to write image pels on the screen during two successive field scans of the raster. The auxilliary deflection means is controlled so that the entire image is formed on the image lines, and the field scan in which the pels are allocated for display is selected on-the-fly for successive portions of the input video in such a way that pel imbalance between the two fields constituting the final image is minimized.
REFERENCES:
patent: 3418518 (1968-12-01), Reese, Jr.
IBM Technical Disclosure Bulletin, vol. 21, No. 4, Sep. 1978, pp. 1673-1674, "Reduction of Flicker in Interlaced CRT Data Displays", B. F. Dowden.
IBM Technical Disclosure Bulletin, vol. 21, No. 4, Sep. 1978, p. 1675, "Flicker Reduction in Interlaced CRT Data Displays", J. H. Boal et al.
IBM Technical Disclosure Bulletin, vol. 19, No. 12, May 1977, pp. 4796-4797, "Raster Scan CRT Display", J. G. Axford.
Curtis Marshall M.
International Business Machines - Corporation
Poag Frederick D.
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