Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Tatsuyoshi Takahashi0
Hiromi Seo0
Satoshi Seo0
Date of Patent
June 7, 2022
0Patent Application Number
169442570
Date Filed
July 31, 2020
0Patent Citations
Patent Primary Examiner
To provide a light-emitting element which uses a fluorescent material as a light-emitting substance and has higher luminous efficiency. To provide a light-emitting element which includes a mixture of a thermally activated delayed fluorescent substance and a fluorescent material. By making the emission spectrum of the thermally activated delayed fluorescent substance overlap with an absorption band on the longest wavelength side in absorption by the fluorescent material in an S
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