Method and apparatus for determining developer consumption,...

Details Method and apparatus for determining developer consumption,... Method and apparatus for determining developer consumption,...

2011-07-05

2011-07-05

Tieu, Benny Q (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Data corruption, power interruption, or print prevention

C358S406000, C358S504000, C399S024000, C399S027000

Reexamination Certificate

active

07973952

ABSTRACT:
A developer consumption determining method for determining a developer consumption of an image forming apparatus includes the steps of dividing one of writing pixels into a plurality of sub-pixels in a main scanning direction, determining a weighting coefficient for each of surrounding sub-pixels of one of the sub-pixels located within a predetermined distance from the one of the sub-pixels on the basis of positional relationships, determining respective emission coefficients for the surrounding sub-pixels on the basis of one of durations and exposures of the light beams applied to the surrounding sub-pixels, summing products of the weighting coefficients of the surrounding sub-pixels and the respective emission coefficients to obtain total exposure for the one of the sub-pixels, repeating for all of the sub-pixels the steps of determining the weighting coefficient, determining respective emission coefficients, and summing products, and summing the total exposures for all the sub-pixels to determine the developer consumption.

REFERENCES:
patent: 5655174 (1997-08-01), Hirst
patent: 7460168 (2008-12-01), Horiuchi
patent: 2002/0135789 (2002-09-01), Ono
patent: 58-224363 (1983-12-01), None
patent: 9-120238 (1997-05-01), None
patent: 2002-174929 (2002-06-01), None
patent: 2004-163885 (2004-06-01), None
patent: 2004-338125 (2004-12-01), None
U.S. Appl. No. 10/757,390, filed Jan. 15, 2004, Ono.
Japanese Office Action issued Jan. 11, 2011, in Patent Application No. 2005-326650.

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