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:
Nov. 27, 2001
Filed:
Apr. 28, 1999
Kazunori Katakura, Atsugi, JP;
Takashi Enomoto, Sagamihara, JP;
Takao Takiguchi, Tokyo, JP;
Jun Iba, Yokohama, JP;
Seishi Miura, Ebina, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A liquid crystal device of the active matrix-type having two-dimensionally arranged pixels along rows and columns is driven frame by frame. In each frame operation, a scanning selection period (T,) for each selected row is divided into a first period (t,) and a second period (t,). In t,of a current frame (T,), a reset pulse is applied to a pixel concerned, and the reset pulse is set to have an absolute value of voltage identical to and a polarity opposite to those of a writing pulse voltage applied to the pixel in the previous frame (T,). Then, in t,of the current frame (T,), the pixel is supplied with a writing pulse depending on a prescribed display state of the pixel for the current frame. As a result, the reset period is shortened to favor a high-speed display and a higher resolution display.