Method of improved printing using a spatial light modulator

Details Method of improved printing using a spatial light modulator Method of improved printing using a spatial light modulator

1997-01-07

1998-02-17

Frahm, Eric

Facsimile and static presentation processing

Facsimile

Recording apparatus

358300, 358455, 347239, H04N 140, H04N 123, G01D 942

Patent

active

057196826

ABSTRACT:
A method for printing grayscale images that compensates for problems in the printing process. The presence of a defective element on a spatial light modulator (12) is compensated for with use of a white balancing area. If a column of the modulator (12) has an element stuck ON, a corresponding element in the same column in the white balancing area is turned OFF while all other columns have elements that are ON. If the illumination is non-uniform, the exposure values of each element are multiplied by an efficiency factor which compensates for the non-uniformity.

REFERENCES:
patent: 5453778 (1995-09-01), Venkateswar et al.
patent: 5459492 (1995-10-01), Venkateswar
patent: 5461411 (1995-10-01), Florence et al.
patent: 5493322 (1996-02-01), Ng et al.
patent: 5510824 (1996-04-01), Nelson
patent: 5614937 (1997-03-01), Nelson

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