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:
Aug. 21, 2001
Filed:
Mar. 31, 1999
Applicant:
Inventors:
Yoshitaka Ukai, Higashimoro Kata-gun, JP;
Hitoshi Hirakawa, Takasago, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G09G 3/28 ;
U.S. Cl.
CPC ...
G09G 3/28 ;
Abstract
In a method of driving a plasma display panel to display gradation, a field includes a plurality of subfields, the subfields of each field are separated into a plurality of subfield groups, and each subfield is weighted in brightness in such a manner that the subfields in the subfield group are all equal in weight. An address period and a sustain period are allocated to each subfield. In at least one subfield group, a number of times of sustaining discharge for a subfield to be sustained independently is set different from a number of times of sustaining discharge for at least one other subfield.