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:
Dec. 21, 1999
Filed:
Dec. 22, 1997
Hajime Nakamura, Yokohama, JP;
Michikazu Noguchi, Sagamihara, JP;
International Business Machines Corporation, Armonk, NY (US);
Abstract
A voltage application driving method is provided for quickly changing the alignment of a liquid crystal layer in thin film transistor liquid crystal displays (TFT/LCD) to a bend alignment. In this driving method, a potential difference larger than 10 V is continuously or intermittently provided between the signal electrode of the liquid crystal cells, and the counter electrode of the display while maintaining the potential difference between the gate electrode and the signal electrode of the cells larger than 10 V. The on-time over which an intermittent potential difference is provided between the signal electrode and the counter electrode is preferably equal to or longer than the time period for part of the liquid crystal layer to effectively begin a transition to the second-stage splay alignment, and the off-time over which no potential difference is provided between the signal electrode and the counter electrode is equal to or longer than the time period necessary for the liquid crystal region of of the second-stage splay alignment to return to its state before the voltage application.