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:
Oct. 13, 1987
Filed:
Feb. 19, 1986
Kei Sato, Yokohama, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
To provide a smooth representation in half-tones of a record, the area of a dot recorded by a laser printer is controlled. Binary image information which is applied to the laser printer is examined to determine if it is isolated when it is to be recorded 'black'. When the laser printer is operated in the background exposure scheme, the off time of the laser which records an isolated 'black' is increased whereas when the laser printer is operated in the image exposure scheme, the on time of the laser which records an isolated 'black' is reduced. The control of the recorded area per dot is disclosed for one dimension array (in the direction of main scan X) and two dimension array (in the directions of main scan X and subscan Y). Also, the recorded area per dot can be controlled by controlling the transmission of laser beam through an AO modulator in a manner corresponding to the detection of the isolation.