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:
Feb. 11, 1997
Filed:
Aug. 25, 1994
Richard L Rylander, Stillwater, MN (US);
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Abstract
A set of thinned halftone dot patterns useful in inkjet printing comprises a plurality of halftone cells corresponding to respective shade values. Each of the halftone cells includes a plurality of addressable points, with at least some of the points being turned 'on' to define a halftone dot pattern, and at least some of the 'on' points defining a core component of the halftone dot pattern being selectively turned 'off', thereby producing a thinned halftone dot pattern. The thinned halftone dot patterns enable the use of higher addressability in an inkjet printing system to achieve a wider range of shade values while avoiding undesirable over-inking of printed halftone dot patterns due to excessive overlap between printed ink spots. The thinned halftone dot patterns prevent significant overlap between adjacent ink spots in the core, or 'interior', component when the halftone dot pattern is printed by the inkjet printing system, but preserves the entire edge component to maintain desired halftone cell definition. Thinned halftone cells can be stored in a memory as 'glyphs' and retrieved by an inkjet printing system to print higher addressability halftone images with enhanced quality and a wider range of shade values.