Raster-scan display apparatus for computer-generated images

Details Raster-scan display apparatus for computer-generated images Raster-scan display apparatus for computer-generated images

1976-06-22

1978-10-10

Curtis, Marshall M.

Communications: electrical

Systems

Portable self-contained

G06F 314

Patent

active

041199561

ABSTRACT:
A raster-scan display system for computer-generated images in which each raster line is quantized into a number (N) of sets of image elements each successive set being displaced in time, with respect to the line start, by 1/N of the duration of one element. The corresponding video signals are summed for each line and the resultant signal is displayed. The technique provides a visual image with graded intensity changes more nearly simulating a television type image, instead of a stepwise changing image. In one form of the invention, a triangular hold technique is used, that is, the display is delayed to permit of a linearly changing intensity charge between consecutive elements of different intensity.

REFERENCES:
patent: 3603962 (1971-09-01), Lechner
patent: 3792464 (1974-02-01), Hamada et al.
patent: 3811113 (1974-05-01), Saito et al.
patent: 3812491 (1974-05-01), Barraclough et al.
patent: 3930251 (1975-12-01), Salava et al.

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