Door locking device for vehicle
US10487546B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 18, 2017 |
| Grant date | Nov 26, 2019 |
| Priority date | — |
| Expiry date | Jan 26, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07C9/00309
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
This door locking device for a vehicle includes: an electronic key and an in-vehicle device. The electronic key stores a first threshold defining an extension of a first region in which an electric field intensity of a response request signal is strong and a second threshold for defining an extension of a second region in which an electric field intensity is weaker than the first region around the first region. The electronic key outputs, based on the electric field intensity of the response request signal and the first and second thresholds, a response signal including position information indicating whether the electronic key is in the first region, or is outside the first region but in the second region, or is outside the second region. Based on the received response signal, the in-vehicle device switches the door to an unlocked state or a locked state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.