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:
Dec. 30, 2014
Filed:
Jan. 28, 2011
Makoto Anryu, Tsukuba, JP;
Kohei Asada, Tsukuba, JP;
Shigeru Sasaki, Tsukuba, JP;
Takeshi Yamada, Tsukuba, JP;
Makoto Anryu, Tsukuba, JP;
Kohei Asada, Tsukuba, JP;
Shigeru Sasaki, Tsukuba, JP;
Takeshi Yamada, Tsukuba, JP;
Sumitomo Chemical Company, Limited, Tokyo, JP;
Abstract
A light emitting material included in a light emitting device. The light emitting material includes a conjugated polymer having a conjugated part and a blue light emitting compound having a blue light emitting part and satisfies the following formula y≧log(5.1×x+1), wherein y represents the amount of light emitted by the blue light emitting compound where the total amount of light emitted by the conjugated polymer and the blue light emitting compound in the light emitting material due to excitation caused by light having a wavelength of 370 nm is 1, and provided that the gram light absorption coefficient of the conjugated polymer and the blue light emitting compound in the light emitting material are expressed by εand ε, and further the content of the blue light emitting compound is expressed by P(parts by mass) where the total content of the conjugated polymer and the blue light emitting compound in the light emitting material is 100 parts by mass, x is defined by the formula: X=(ε2/ε1)×Pcorresponds to x.