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:
Sep. 29, 1998
Filed:
Sep. 18, 1996
Akira Tsuboyama, Atsugi, JP;
Hiroyuki Yokomizo, Atsugi, JP;
Mitsuo Iwayama, Odawara, JP;
Kazunori Katakura, Atsugi, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A display apparatus includes a display panel having a matrix structure formed by a scan electrode group and a data electrode group, a scan electrode drive unit for operating the scan electrode group, a data electrode drive unit for operating the data electrode group, and a switching unit for switching on/off the electrical connection between a drive voltage generating unit for supplying drive voltage to the drive unit and a power supply source for supplying power to the drive voltage generating unit. Also included is a detection unit for detecting that the switching unit has been switched off, and a control unit for controlling the scan electrode drive unit and data electrode drive unit to apply a display drive signal for causing the display panel to display a desired image according to image information when the switching unit is switched on and to apply, to the scan electrode group and the data electrode group, non-pixel portion control voltage signals for controlling the optical state of liquid crystal in non-pixel portions which are regions except for intersection portions between the scan electrode group and the data electrode group immediately after or after the switching unit has been switched off.