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.:

US 9389481 B1

PDF
Full Text
Expired
Date of Patent:
Jul. 12, 2016

Filed:

Jun. 22, 2012
Applicants:

Hey-jin Myoung, Seoul, KR;

Ho-suk Song, Yongin-si, KR;

Hyeon-jung Yoo, Yongin-si, KR;

Young-seo Yoon, Seoul, KR;

Inventors:

Hey-Jin Myoung, Seoul, KR;

Ho-Suk Song, Yongin-si, KR;

Hyeon-Jung Yoo, Yongin-si, KR;

Young-Seo Yoon, Seoul, KR;

Assignee:

KOLON INDUSTRIES, INC., Kwacheon, KR;

Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02F 1/167 (2006.01); G02B 26/00 (2006.01);
U.S. Cl.
CPC ...
G02F 1/167 (2013.01); G02F 2001/1678 (2013.01);
Abstract

The present invention is directed to an electrophoretic slurry composition and an electrophoretic display device comprising the same, where the electrophoretic slurry comprises charged particles; polymer beads comprising an acryl- or vinyl-based repeating unit; and a fluid medium. Accordingly, the present invention has a high reactivity to a driving voltage, sustains images or text for a predetermined period of time or longer even when the driving voltage is switched off, and provides a high contrast ratio and enhanced visibility to implement high-quality text or images.


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