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:
Jan. 13, 2009
Filed:
Jan. 21, 2004
Tadashi Iwamatsu, Nara, JP;
Hiroyuki Hirakawa, Nara, JP;
Nobuyuki Azuma, Osaka, JP;
Yoshinori Mutou, Nara, JP;
Tadashi Iwamatsu, Nara, JP;
Hiroyuki Hirakawa, Nara, JP;
Nobuyuki Azuma, Osaka, JP;
Yoshinori Mutou, Nara, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A large number of holes are formed in a two-layered porous film sandwiched between a lower substrate and an upper substrate and filled with a light transmitting liquid and fine particles. When a voltage is applied between an upper electrode and a lower electrode, migration of the fine particles, takes place based on electrophoresis. White color is displayed when the fine particles are located on an upper transparent porous film side and black color is displayed when the fine particles are located on a lower black porous film side. Color display is also possible by periodically repeating three primary colors of RGB in the lower layer porous film or arranging a color filter on the transparent upper substrate. Bubbles-containing fine particles or bubbles themselves may be employed in place of the fine particles.