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. 13, 2007
Filed:
Jul. 31, 2003
Nobuaki Kabuto, Kunitachi, JP;
Toshimitsu Watanabe, Yokohama, JP;
Yoshie Kodera, Chigasaki, JP;
Mutsumi Suzuki, Kodaira, JP;
Tetsu Ohishi, Hiratsuka, JP;
Nobuaki Kabuto, Kunitachi, JP;
Toshimitsu Watanabe, Yokohama, JP;
Yoshie Kodera, Chigasaki, JP;
Mutsumi Suzuki, Kodaira, JP;
Tetsu Ohishi, Hiratsuka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The present invention provides a bright and high-resolution display apparatus having a dynamic range exceeding the number of gray-scale voltage (or current) outputs, which a signal driver is capable of generating. In accordance with the present invention, a select period, in which a group of pixels on each row is driven, is divided into a plurality of sub-periods. The signal driver supplies a voltage output varying from sub-period to sub-period to selected pixels through a signal electrode. The pixel is capable of expressing various values of a gray scale, the size of which is at least approximately equal to (the number of gray-scale voltage outputs, which the signal driver is capable of generating)×(the number of sub-periods). By changing the ratio of the length of a sub-period to the length of another sub-period or the range of the driving voltage (or current), the dynamic range of the display can be further increased.