Pupil tracking device
US10747995B2 · kind B2 · utility
2Cited by
1References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 4, 2019 |
| Grant date | Aug 18, 2020 |
| Priority date | — |
| Expiry date | Nov 4, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/74
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
There is provided a pupil tracking device including an active light source, an image sensor and a processing unit. The active light source emits light toward an eyeball alternatively in a first brightness value and a second brightness value. The image sensor captures a first brightness image corresponding to the first brightness value and a second brightness image corresponding to the second brightness value. The processing unit identifies a brightest region at corresponding positions of the first brightness image and the second brightness image as an active light image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.