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. 16, 2024
Filed:
Apr. 14, 2023
Semiconductor Energy Laboratory Co., Ltd., Atsugi, JP;
Taisuke Kamada, Niiza, JP;
Ryo Hatsumi, Hadano, JP;
Daisuke Kubota, Atsugi, JP;
Naoaki Hashimoto, Sagamihara, JP;
Tsunenori Suzuki, Yokohama, JP;
Harue Osaka, Atsugi, JP;
Satoshi Seo, Sagamihara, JP;
Semiconductor Energy Laboratory Co., Ltd., Atsugi, JP;
Abstract
An object is to provide a highly reliable display unit having a function of sensing light. The display unit includes a light-receiving device and a light-emitting device. The light-receiving device includes an active layer between a pair of electrodes. The light-emitting device includes a hole-injection layer, a light-emitting layer, and an electron-transport layer between a pair of electrodes. The light-receiving device and the light-emitting device share one of the electrodes, and may further share another common layer between the pair of electrodes. The hole-injection layer is in contact with an anode and contains a first compound and a second compound. The electron-transport property of the electron-transport layer is low; hence, the light-emitting layer is less likely to have excess electrons. Here, the first compound is the material having a property of accepting electrons from the second compound.