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:
Jan. 27, 1998
Filed:
Jun. 27, 1995
Other;
Abstract
A resolution enhancement apparatus and method of a laser printer using a modulated laser beam is adapted to an image forming apparatus of the laser printer. It includes a memory for storing sequentially input image data in a sequential scanning method, rearranging a scanning line order and generating a 5.times.5 sample window. Also included are a first processor for classifying and outputting a pattern of the image data according to bitmap information in a pixel using nine 3.times.3 masks produced from the 5.times.5 sample window supplied from the memory, a second processor for using pixel density to classify data output from the first processor into a plurality of groups and outputting data of the classified groups, and a signal modulator for modulating data output from the second processor into a predetermined pattern and outputting the modulated pattern. This minimizes the use of memory space by using four row line memories and enhancing resolution by expressing finite shapes according to nineteen modulation patterns while eliminating the more severe portions of pixel magnitude variation (step phenomenon).