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:
Mar. 29, 2005
Filed:
Jan. 26, 2001
Akira Inoue, Shiojiri, JP;
Akihiko Ito, Tatsuno-cho, JP;
Ryo Ishii, Matsumoto, JP;
Suguru Yamazaki, Suwa, JP;
Akira Inoue, Shiojiri, JP;
Akihiko Ito, Tatsuno-cho, JP;
Ryo Ishii, Matsumoto, JP;
Suguru Yamazaki, Suwa, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
The invention provides an electro-optical device capable of a high-quality and high-definition tone display, a driving method thereof, a driving circuit thereof, and electronic equipment using the same. With the invention, one field is divided into a plurality of sub-fields, such that each pixel is turned on or off in each of the sub-fields so that the proportion of the period during which each pixel is turned on to the period during which the associated pixel is turned off within the one field corresponds to the proportion according to the tone data. Further, when each pixel is turned on, either a first voltage which is higher than a constant reference voltage applied to a counter electrode or a second voltage which is lower than the reference voltage is applied to a pixel electrode of the associated pixel, and when the pixel is turned off, a voltage equal to the reference voltage is applied to the pixel electrode of the pixel.