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. 24, 2018
Filed:
Jun. 05, 2012
Saki Takada, Kanagawa, JP;
Yasunori Yonekuta, Kanagawa, JP;
Toshihiro Ise, Kanagawa, JP;
Tetsu Kitamura, Kanagawa, JP;
Toru Watanabe, Kanagawa, JP;
Wataru Sotoyama, Kanagawa, JP;
Koji Takaku, Kanagawa, JP;
Katsuyuki Youfu, Kanagawa, JP;
Saki Takada, Kanagawa, JP;
Yasunori Yonekuta, Kanagawa, JP;
Toshihiro Ise, Kanagawa, JP;
Tetsu Kitamura, Kanagawa, JP;
Toru Watanabe, Kanagawa, JP;
Wataru Sotoyama, Kanagawa, JP;
Koji Takaku, Kanagawa, JP;
Katsuyuki Youfu, Kanagawa, JP;
UDC IRELAND LIMITED, Dublin, IE;
Abstract
An organic electroluminescent element that uses a compound expressed by the following general formula emits dark blue light and exhibits little change in chromaticity during brightness modulation. (n1 is an integer from 0 to 8; the R[groups] are each independently a substituent substituted for a hydrogen atom of the pyrene skeleton; X is CRR(Rand Rare each independently a hydrogen atom or a substituent), O, S, or SiRR(Rand Rare each independently a hydrogen atom or a substituent); and Ato Arepresent each independently either N or CR(Rrepresents a hydrogen atom or a substituent, and two adjacent R[groups] may jointly form a saturated or unsaturated ring, but no more than two rings may be formed jointly by two or more of the R[groups]).)