The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 14, 2001
Filed:
Dec. 22, 1998
Douglas W. Couwenhoven, Fairport, NY (US);
Xin Wen, Rochester, NY (US);
Lam J. Ewell, Rochester, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
A method of compensating for malperforming nozzles in an inkjet printing device having a printhead with a plurality of nozzles, including a first nozzle which prints along a first path, and at least a second nozzle which is capable of printing along substantially the same path as said first path, said nozzles adapted to printing image pixels containing two or more states according to a swath data signal, wherein each state corresponds to a volume of ink that is desired to be emitted by a nozzle, comprising the steps of: assigning a state importance value to each state, said state importance value indicating the relative importance of printing the given state compared to printing other states; assigning a nozzle malperformance value to each nozzle, said nozzle malperformance value indicating the relative image quality penalty of using the given nozzle compared to using other nozzles; computing a modified swath data signal responsive to the swath data signal, the state importance value, and the nozzle malperformance value; and printing the image pixels according to the modified swath data signal.