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:
Aug. 22, 2006
Filed:
Nov. 20, 2000
Takashi Touma, Saitama, JP;
Keiji Tsubota, Saitama, JP;
Takashi Touma, Saitama, JP;
Keiji Tsubota, Saitama, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
There is disclosed an optical printer for printing a grayscale image on a self-developing type photo film unit based on image data. A printing head of the optical printer is provided with a plurality of light emitting elements arranged in a line along a main scan direction whose lighting time lengths are controlled for each pixel in accordance with a tonal level of that pixel. The printing head is shifted relative to the photo film unit in a sub scan direction perpendicular to the main scan direction, to print the image line by line. During each printing cycle of one line, drive voltage applied to the respective light emitting elements are raised with time from an initial value according a predetermined characteristic curve, to increase luminance of the respective light emitting elements as the lighting time for each pixel elapses.