发明授权
- 专利标题： Light-emitting element, exposure head and image-forming apparatus
- 专利标题（中）： 发光元件，曝光头和图像形成装置
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申请号： US12726661申请日： 2010-03-18
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公开(公告)号： US08427517B2公开(公告)日： 2013-04-23
- 发明人: Tetsuji Fujita , Hidetoshi Yamamoto
- 申请人： Tetsuji Fujita , Hidetoshi Yamamoto
- 申请人地址： JP Tokyo
- 专利权人： Seiko Epson Corporation
- 当前专利权人： Seiko Epson Corporation
- 当前专利权人地址： JP Tokyo
- 代理机构： Oliff & Berridge, PLC
- 优先权： JP2009-077819 20090326
- 主分类号： B41J2/45
- IPC分类号： B41J2/45 ; H01L29/08
摘要：
A light-emitting element includes a cathode, an anode, a luminescent layer disposed between the cathode and the anode, a first electron transport layer disposed between the luminescent layer and the cathode, and a second electron transport layer in contact with the luminescent layer and the first electron transport layer between the luminescent layer and the first electron transport layer. The luminescent layer contains a red luminescent material emitting red light. The first electron transport layer contains a first electron transport material. The second electron transport layer contains a second electron transport material different from the first electron transport material.