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:
May. 15, 2001
Filed:
Feb. 11, 1999
Xuan-Chao Huang, Lexington, KY (US);
Brant Dennis Nystrom, Lexington, KY (US);
Lexmark International, Inc., Lexington, KY (US);
Abstract
A device and method of determining an amount of ink to be used to print a color of a particular color lightness, chroma and hue in an inkjet printer in which the color lightness, chroma and hue are measured for a full ink wedge and a reduced ink wedge for a given color. The full ink wedge uses the maximum amount of ink for the given color and causes bleed through or smearing to occur and the reduced ink wedge uses less than the maximum amount of ink for the given color. A color difference between the reduced ink wedge and the full ink wedge is calculated. A vector distance between the reduced ink wedge and a white point in a three-dimensional colorant space is then calculated. Calibration points for each colorant or colorant combination in a three-dimensional colorant space are determined based on the vector distance, the color difference, and the predetermined color tolerance. A printer profile table is then generated using these new calibration points and downloaded to the printer. Printing using a reduced ink volume is then accomplished using the printer profile table.