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:
May. 13, 1980
Filed:
Nov. 23, 1977
Applicant:
Inventors:
Andrew L Dalisa, Yorktown Heights, NY (US);
Barry M Singer, New York, NY (US);
Assignee:
North American Philips Corporation, New York, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
G09F / ;
U.S. Cl.
CPC ...
340787 ; 340716 ; 340763 ; 340785 ; 350362 ;
Abstract
An electrophoretic display device in which an colloidal suspension of pigment particles is contained between a pair of electrodes, and means are provided in the structure of the electrodes of the cell for the establishment of a voltage threshold for the transport of pigment particles. This threshold permits the changing of the spatial distribution of pigment particles in specifically defined regions of the display cell.