OLED display panel and electronic device comprising the same

US10700298B2 · kind B2 · utility

Assignees

• Shanghai Tianma AM-OLED Co., Ltd. · CN
• TIANMA MICROELECTRONICS CO., LTD. · CN

Inventors

• Xiangcheng Wang · Shanghai, CN
• Chen-Yu Liu · Taoyuan, TW
• Wei He · Beijing, CN
• Jinghua Niu · Shanghai, CN
• Yuji Hamada · Tokyo, JP
• Ying Liu · Sanjiaodian, TW

Key dates

• Filing date: Jul 17, 2017
• Grant date: Jun 30, 2020
• Expiry date: Mar 13, 2038

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10K85/626

Abstract

The present invention relates to an OLED display panel comprising a first electrode, and a first hole transporting layer, a second hole transporting layer, and an electron transporting layer stacked on the first electrode, and a second electrode formed; at least two light emitting units are provided on the second hole transporting layer; the electron transporting layer covers the light emitting units; the material of the electron transporting layer fills the gap(s) between adjacent light emitting units; the first hole transporting layer comprises a hole transporting material which has a hole mobility of 9×10−5-5×10−4 cm2/V·S, and a solubility of 10 g/L or more in a cleaning solvent at 25° C. The present invention utilizes a hole transporting material having a specific hole mobility as a common hole transporting layer, avoiding crosstalks between different pixels.