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:
Sep. 06, 2016
Filed:
Sep. 11, 2015
Applicant:
E Ink California, Llc, Fremont, CA (US);
Inventors:
Yu Li, Fremont, CA (US);
HongMei Zang, Fremont, CA (US);
Assignee:
E INK CALIFORNIA, LLC, Fremont, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 26/00 (2006.01); G02B 26/08 (2006.01); G02F 1/29 (2006.01); G09G 3/34 (2006.01); G02F 1/167 (2006.01); B42D 25/30 (2014.01); B42D 25/00 (2014.01);
U.S. Cl.
CPC ...
G02F 1/167 (2013.01); B42D 25/00 (2014.10); B42D 25/30 (2014.10); G02F 2001/1672 (2013.01); G02F 2201/50 (2013.01); G02F 2201/501 (2013.01); G02F 2201/503 (2013.01); G02F 2202/04 (2013.01);
Abstract
The present invention is directed to an electrophoretic display film which can be controlled to malfunction permanently within a period of time. It provides an elegant method to utilize an electrophoretic film for anti-counterfeit purposes. The concept involves the removal of strong barrier layer(s) from the film to allow the solvent in the electrophoretic fluid within the film to evaporate through weak barrier layer(s), and within a period of time, the performance of the display film will be significantly degraded and the film cannot be re-used.