Bi-level display systems

Details Bi-level display systems Bi-level display systems

1975-03-19

1976-12-14

Martin, John C.

Telegraphy

Systems

Simplex-reversing periodic

315169TV, 340324M, H04N 570, G08B 2300

Patent

active

039977196

ABSTRACT:
Bi-level display systems capable of presenting gray-scale images are adapted for brightness and contrast control by circuitry which varies the means and deviation of the threshold values assigned to the cells of the display panel.

REFERENCES:
patent: 3522585 (1970-08-01), Lemay
patent: 3590156 (1971-06-01), Easton
patent: 3647958 (1972-03-01), Sobel
patent: 3706071 (1972-12-01), Gray
patent: 3843959 (1974-10-01), Owaki et al.
patent: 3845243 (1974-10-01), Schmersal et al.
patent: 3863023 (1975-01-01), Schmersal et al.
patent: 3925609 (1975-12-01), Ninke

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