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:
Apr. 07, 2009
Filed:
Jun. 14, 2006
Hidenao Kubota, Yokohama, JP;
Hirofumi Sakamoto, Fujisawa, JP;
Masahiko Umeda, Yokohama, JP;
Masatoshi Sudo, Yokohama, JP;
Hidenao Kubota, Yokohama, JP;
Hirofumi Sakamoto, Fujisawa, JP;
Masahiko Umeda, Yokohama, JP;
Masatoshi Sudo, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The initial color temperature setting can change when a plasma display panel (PDP) is driven for a long period of time. One cause is due to the non-uniform deterioration of red, green, and blue fluorescent materials due to the ultraviolet rays discharged during operation of the panel. Color temperature correction is performed by setting the numbers of discharge pulses for fluorescent materials in accordance with a discharge pulse number correction curve with respect to the cumulative elapsed driven time of the PDP.