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:
Jul. 19, 1983
Filed:
Jul. 30, 1981
Applicant:
Inventors:
Kunio Yoshida, Kawasaki, JP;
Hiroaki Kotera, Kawasaki, JP;
Yukifumi Tsuda, Kawasaki, JP;
Yoshimitsu Kanno, Sagamihara, JP;
Motohiko Naka, Kanagawa, JP;
Assignee:
Matsushita Research Institute Tokyo, Inc., Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01D / ; G01D / ; H04N / ;
U.S. Cl.
CPC ...
346 / ; 3461 / ; 346160 ; 358298 ;
Abstract
To overcome the tendency of the recording head of a dot printer to become inoperative in a range below a threshold level, a gray scale input signal is modulated with an oscillating signal so that the modulated signal oscillates above and below the threshold level to reproduce halftone values below the otherwise inoperative range.