Non-uniformity correction of an LED printhead

Details Non-uniformity correction of an LED printhead Non-uniformity correction of an LED printhead

1994-09-20

1996-12-17

Voeltz, Emanuel T.

Boots, shoes, and leggings

36457101, 36457106, 36457107, 3461071, 3461076, 358298, G01D 1514, H04N 123

Patent

active

055860559

ABSTRACT:
A method for calibrating a printer that includes an LED printhead wherein the LEDs are arranged in a row in a series of arrays wherein each array includes a plurality of LEDs generally uniformly spaced a nominal pitch distance on the array in the direction of the row. The arrays have respective array end LEDs which have spacing from adjacent array end LEDs on adjacent arrays that are different than the nominal pitch distance. The method comprises the steps of (a) measuring a parametric output associated with light-emissions from each recording element; (b) assigning correction factors to the recording elements to correct for non-uniformity of light emissions therefrom with recording elements having generally similar measured parametric outputs being assigned identical correction factors; (c) assigning correction factors to array end recording elements, that are spaced other than the nominal pitch distance, in accordance with parameters relating to their spacing from a respective adjacent array end recording element and their measured parametric outputs; and (d) storing the correction factors in a memory associated with the printhead.

REFERENCES:
patent: 4746941 (1988-05-01), Pham et al.
patent: 4831395 (1989-05-01), Pham et al.
patent: 4885597 (1989-12-01), Tschang et al.
patent: 5200765 (1993-04-01), Tai
patent: 5255013 (1993-10-01), Ng et al.
patent: 5257039 (1993-10-01), Chung et al.
US Patent application 08/175,079, Ajewole.
US Patent application 07/807,522, Kelly.

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