Animated dithered display systems

Details Animated dithered display systems Animated dithered display systems

1975-01-21

1976-02-10

Libman, George H.

Telegraphy

Systems

Simplex-reversing periodic

315169TV, 340324M, H04N 314

Patent

active

039378780

ABSTRACT:
Dithered display systems are adapted to present animated images via a conditional replenishment technique. The only cells of the display panel which are accessed for any given frame are cells which are to have states in that frame which differ from their respective states in the previous frame. Additionally, random scintillations in animated dithered displays are substantially eliminated by establishing a hysteresis band about the dither threshold value assigned to each display cell. The hysteresis band is delimited by upper and lower dither threshold values. Determination of whether the intensity of a given picture element of the image to be displayed is to be compared to the upper or the lower dither threshold value assigned to the corresponding display cell is made based on the current state of the cell.

REFERENCES:
patent: 3571505 (1971-03-01), Mounts
patent: 3787834 (1974-01-01), Elliott
patent: 3843959 (1974-10-01), Owaki et al.
patent: 3887763 (1975-06-01), Hinoshita et al.
Haskell et al., Proceedings of the IEEE, July 1972, Vol. 60, pp. 792-800.

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