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. 31, 1989
Filed:
May. 13, 1988
Applicant:
Inventor:
Kiyosuke Suzuki, Saitama, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G01D / ;
U.S. Cl.
CPC ...
364519 ; 358296 ;
Abstract
A head drive system for printer apparatus for gray scale recording divides digital data representing each pixel into upper and lower groups of bits respectively defining upper bit data and lower bit data. The lower bit data is compared with periodic reference data. On the basis of the comparison, binary data is derived and added to the upper bit data to form output data for controlling a printer head. The invention combines the advantages of density modulation and area modulation and at the same time enables high speed data processing and printing.