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. 20, 2001
Filed:
Oct. 08, 1997
Takashi Sasaki, Hiratsuka, JP;
Masaji Ishigaki, Yokohama, JP;
Takahisa Mizuta, Yokohama, JP;
Takeo Masuda, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A plasma display panel driving system having common X electrodes arranged on a front glass substrate driven in common, independent Y electrodes arranged parallel to the common X electrodes on the front glass substrate driven independently, address A electrodes arranged perpendicular to the common X electrodes and the independent Y electrodes on the back glass substrate driven independently, and means for performing at least one electric discharge for equalizing electrically charged particles in a cell in which another electrically charged particle is produced beforehand, thereby improving contrast. Erasing and polarization of electrically charged particles are performed by a fine line erasing pulse after a sustaining period, and an equalizing pulse having a high voltage level is supplied to the independent Y electrode to which the last fine line erasing pulse is supplied, and a regulating pulse is supplied to the common X electrode after supplying the equalizing pulse. Further, a field block having plurality of sub-fields are provided, and a full writing electric discharge and a fine line erasing electric discharge are performed in the first sub-field of each field block for reducing the number of electric discharges.