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:
Sep. 28, 1993
Filed:
Sep. 20, 1991
Mitsuo Kaji, Tokyo, JP;
Miki Ishihara, Tokyo, JP;
NEC Corporation, , JP;
Abstract
Color video signals representing gradation values of yellow, magenta, cyan and black components of a halftone original are stored into respective video memories (4) and matrix patterns of screen values are stored in respective areas of a screen memory (7) corresponding to the colors of the video signals. Each matrix pattern has repeating areas extending in a direction inclined to the orientation of the original at an angle .phi. which satisfies tan .phi.=1/(tan .theta.+cot .theta.). Each of the color signals is retrieved from the video memories (4) at line intervals depending on the screen angle .theta. so that if the video signal is reconstructed on a hypothetical plane the line starting points of a resultant image would substantially delineate a line path that is inclined to the orientation of the original by an amount corresponding to the screen angle .theta. of the color of the video signal. The screen values of each matrix pattern are repeatedly retrieved corresponding to the color of the video signal and compared with the retrieved video signal to produce print signals.