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. 24, 1995
Filed:
Jul. 02, 1992
Yukio Tsuda, Tokyo, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
An electrophotographic recording device comprises a photoconductive drum which is rotated at a constant speed, a charger for charging a photoconductive surface of the photoconductive drum, a recording head which includes a large number of light emitting diodes arranged in a line, and which exposes the charged photoconductive surface, in order to form an electrostatic image corresponding to image data on the photoconductive surface, a developing unit for developing the electrostatic image into a toner image, a transfer unit for transferring the toner image onto a paper sheet, a fixing unit for fixing the toner image transferred onto the paper sheet, a line density decision circuit for deciding the line density of an image from the image data, and an emission time setting circuit for determining an emission time of the light emitting diodes in accordance with the line density detected by the decision circuit, the emission time setting circuit determining a first emission time in relation to image data to be printed with a first line density, and determining a second emission time shorter than the first emission time in relation to image data to be printed with a second line density higher than the first line density.