Monitoring system
US10963718B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 5, 2019 |
| Grant date | Mar 30, 2021 |
| Priority date | — |
| Expiry date | Nov 5, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/40
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A monitoring system includes a pair of a right-side light source and a left-side light source for irradiating the face of an occupant with light, the pair being disposed in the horizontal direction with a camera interposed therebetween when the camera is viewed from the vertical direction. The right-side light source and the left-side light source are alternately turned on for each imaging by the camera. The camera obtains each of a first face image that is imaged in accordance with lighting of the right-side light source and a second face image that is imaged in accordance with lighting of the left-side light source. A controller determines the visual line state based on the first face image, and the second face image that is obtained at a time point proximate to the time point at which the first face image is obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.