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:
Mar. 25, 1997
Filed:
Aug. 03, 1993
Yasuhiro Yoshida, Nara, JP;
Gen Itoh, Amagasaki, JP;
Hiroyuki Furukawa, Ueno, JP;
Masaki Takakura, Higashiosaka, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A color correction circuit is best adjusted to consistently obtain a stable, color printing by compensating for a change in the characteristic of a printer under the influence of ambient temperature and humidity. Before the printing of pictorial data, e.g., an image, (reference data produced by a reference data generator), is entered into a printer engine by which it is printed out on a sheet of a paper. This printed data is read in by a color sensor, which in turn produces an output detection signal. A feedback control circuit produces a control signal necessary for a color correction according to the output signal of the color sensor and then sends it to the color correction circuit. The color correction circuit is adjusted and corrects the colors of the pictorial data to be printed. The corrected data is printed out. Repeating this process for each color printing can prevent a variation in the printed colors due to the effect of ambient temperature.