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:
May. 23, 2006
Filed:
Mar. 07, 2003
Takashi Ogawa, Gifu, JP;
Yoshinori Saito, Konan, JP;
Hitoshi Yasuda, Gifu, JP;
Ryuji Nishikawa, Gifu, JP;
Takashi Ogawa, Gifu, JP;
Yoshinori Saito, Konan, JP;
Hitoshi Yasuda, Gifu, JP;
Ryuji Nishikawa, Gifu, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
The upper limit Vof the driving voltage PVdd is set in such way that the brightness of an organic EL element is lower than the first standard brightness Lwhen the video signal Dm is at the black signal level (V), in an EL display device with the driving source for driving the organic EL element. Also, the lower limit Vof the driving voltage PVdd is set in such way the brightness of the organic EL element is higher than the second standard brightness Lwhen the video signal Dm is at the white signal level (V). The electroluminescent display device displays black and white with a proper contrast.