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. 04, 1980
Filed:
Mar. 06, 1978
Applicant:
Inventor:
Michael F Tompsett, New Providence, NJ (US);
Assignee:
Bell Telephone Laboratories, Incorporated, Murray Hill, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C / ; G11C / ;
U.S. Cl.
CPC ...
365114 ; 3151692 ;
Abstract
The optical intensity pattern of a two-dimensional image field is electrically scanned a line at a time by a shift register access technique, thus providing a first stream of bits for each line. Each of these bits in a given line is compared with a dither coded second stream of bits generated in response to the background illumination (absence of image) along a line immediately adjacent to the line being scanned. The resulting sequence of comparisons is a dither coded signal representation of the line being scanned, which is compensated for nonuniform background illumination of the image field.