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:
Oct. 23, 2007
Filed:
Jul. 30, 2003
Wenxin Yu, San Ramon, CA (US);
Jing-den Chen, Milpitas, CA (US);
Chih-yuan Liao, Saratoga, CA (US);
Haiyan Gu, Davis, CA (US);
Hongmei Zang, Sunnyvale, CA (US);
Rong-chang Liang, Cupertino, CA (US);
Wenxin Yu, San Ramon, CA (US);
Jing-Den Chen, Milpitas, CA (US);
Chih-Yuan Liao, Saratoga, CA (US);
Haiyan Gu, Davis, CA (US);
HongMei Zang, Sunnyvale, CA (US);
Rong-Chang Liang, Cupertino, CA (US);
SiPix Imaging, Inc., Fremont, CA (US);
Abstract
The present invention is directed to a method for improving the performance of an electrophoretic display, which method comprises adding a fluorinated quaternary nitrogen salt in either the internal phase or the continuous phase in a microencapsulation process for the formation of pigment-containing microparticles. One or more of the following materials may be further added to the internal phase or continuous phase in the microencapsulation process: a fluorinated protective colloid, a second charge controlling agent or a second monomer or oligomer.