Method of and an apparatus for displaying a picture

Details Method of and an apparatus for displaying a picture Method of and an apparatus for displaying a picture

1987-04-30

1988-05-24

Brigance, Gerald L.

Communications: electrical

Land vehicle alarms or indicators

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

340721, 340731, 340732, 340727, 358242, 273 85G, G09G 114

Patent

active

047469161

ABSTRACT:
In a method of displaying a picture according to the present invention, at least one starting point is determined on a picture screen; a picture is produced on a spiral raster which diverges from or converges toward each of the starting points; a shape, phase, linear density, and scanning speed of each spiral raster are controlled; thereby the patterns displayed on the screen are moved, rotated, enlarged, reduced, or modified.
The central position of this spiral raster is given by setting deflection control signals in the X and Y directions of an electron beam into fixed values. The spiral raster is given by adding sine waves whose amplitudes gradually increase or decrease to the above deflection control signals.
When the frequencies of the deflection control signals are constant, the scanning is performed at a constant angular velocity. On the other hand, when the frequencies are changed in proportion to the amplitudes, the scanning can be done at a constant speed.

REFERENCES:
patent: Re31200 (1983-04-01), Sukonick et al.
patent: 2469895 (1949-05-01), Rogers
patent: 3006994 (1961-10-01), Spiegel
patent: 3380028 (1968-04-01), Gustafson et al.
patent: 3980926 (1976-09-01), Kruegar
patent: 4128838 (1978-12-01), Brands et al.
patent: 4412220 (1983-10-01), Aanstcot et al.
patent: 4415928 (1983-11-01), Strolle et al.
Japanese Disclosure Document Tokkai 57-146, 177, published 1952.
Japanese Disclosure Document Tokkai 49-118325, published 1974.
Journal of the Institute of Television Engineers of Japan, vol. 32, No. 9 (1978) pp. 771-776.
Japanese Disclosure Document Tokkai 46-5573, Dec. 1, 1976.
L'onde Electrique, vol. XXIV, No. 332 (Nov. 1954), Numero Special Consacre a La Television pp. 838 to 841.

Affiliated with

Also associated with

Rating

Method of and an apparatus for displaying a picture 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 of and an apparatus for displaying a picture, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of and an apparatus for displaying a picture will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1060893