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:
Feb. 24, 2009
Filed:
Feb. 03, 2005
Ryo Sakurai, Kokubunji, JP;
Takanori Shoji, Higashimurayama, JP;
Taichi Kobayashi, Kodaira, JP;
Hidetoshi Hiraoka, Nishitokyo, JP;
Ryo Sakurai, Kokubunji, JP;
Takanori Shoji, Higashimurayama, JP;
Taichi Kobayashi, Kodaira, JP;
Hidetoshi Hiraoka, Nishitokyo, JP;
Bridgestone Corporation, Tokyo, JP;
Abstract
An information display device has an information display plate where at least one or more kinds of particles are sealed between cells formed by a partition wall, the cells being between two opposite substrates at least either of which is transparent. At least either of electrodes is provided on a substrate, and an electric field is applied to the particles by the electrodes to move the particles, causing information such as an image to be displayed on the display plate. The surfaces of the substrates are smoothed by making D≧2H satisfied, with D being the diameter of a particle (a particle forming the particles), H the height of the electrodes. This thins the electrodes as much as possible (making the height of the electrodes small) and smoothes the surfaces of the substrates, and as a result, the information display device after an endurance test has an improved contrast ratio.