Access control devices and a transceiver device
US10122449B2 · kind B2 · utility
1Cited by
2References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 27, 2015 |
| Grant date | Nov 6, 2018 |
| Priority date | — |
| Expiry date | Jul 27, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S5/16
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An access control device includes a time of flight circuit configured to determine a distance information related to a distance between the access control device and a peripheral device. The access control device further includes a control module configured to control a transmission of a modulated light transmit signal by the time of flight circuit to the peripheral device. The modulated light transmit signal includes the distance information determined by the time of flight circuit of the access control device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.