Multiple gradation dot-matrix picture forming method

Details Multiple gradation dot-matrix picture forming method Multiple gradation dot-matrix picture forming method

1986-07-28

1988-11-08

Heyman, John S.

350333, 350339R, 350342, G02F 113

Patent

active

047831456

ABSTRACT:
A method of forming a dot-matrix image, in which uniform light is applied to an array of light gates. The transmission of each of the light gates is controlled over several steps according to pictorial data to thus provide a finely graded image. Preferably, a contact screen converts the graded intensities to differently sized dots.

REFERENCES:
patent: 4334734 (1982-06-01), Hareng et al.
patent: 4548476 (1985-10-01), Kaneko
patent: 4605972 (1986-08-01), Hatanaka
patent: 4634226 (1987-01-01), Isogai et al.

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