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:
Nov. 25, 1997
Filed:
Jan. 05, 1996
Gary Hanson, Meridian, ID (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
A laser printer produces a raster image of plural scan lines of image pixels, each raster scan line separated from an adjacent raster scan line by a pitch distance p. The printer includes a movable photoreceptor and n laser sources, where n.ltoreq.2. The laser sources produce n optical beams, separated by a distance of (n+1)p in a direction of movement of the photoreceptor. A scanner scans the n optical beams in parallel paths across the photoreceptor as they are modulated in accordance with pixel data provided from an image buffer. Control circuitry modulates the n optical beams, respectively, with pixel values from one set of n raster scan lines. The n raster scan lines of the set are separated from each other by a distance of (n+1)p. At the completion of each scan, the photoreceptor is moved by a distance (n.times.p). The n optical beams are again modulated with pixel values from another set of n raster scan lines that are respectively, (n+1)p distant from the n raster scan lines of the first set. In such manner, an interleaving of the scan lines is achieved, using plural optical beams from a laser diode chip to produce the n laser beams.