Wavelength conversion film, light-emitting member, authentication device, wristband type electronic apparatus and biometric device
US11774653B2 · kind B2 · utility
1Cited by
0References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 16, 2020 |
| Grant date | Oct 3, 2023 |
| Priority date | — |
| Expiry date | Sep 1, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V40/117
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Disclosed is a wavelength conversion film including at least two or more dyes and absorbing irradiation light to emit light at a longer wavelength than that of the irradiation light. The wavelength conversion film includes a first dye having a maximum absorption wavelength in a red light region, and a second dye absorbing excitation energy of the first dye to emit light in a near infrared region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.