Light-emitting device, authentication notification system, and door
US10634313B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 2017 |
| Grant date | Apr 28, 2020 |
| Priority date | — |
| Expiry date | Mar 27, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B5/26
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Provided is a light-emitting device and the like in which a light source emits light on the basis of information obtained through communications and the light thus emitted is easy for a user to visually recognize. A light-emitting device includes an LED, a light guide plate, a transparent NFC antenna sheet, and an NFC antenna. The transparent NFC antenna sheet and the NFC antenna are disposed on a principal surface or a backside surface of the light guide plate. At least some part of the light guided by the light guide plate exits out through the principal surface. The LED emits light on the basis of identification information obtained through communications via the NFC antenna sheet and the NFC antenna.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.