Visual axis detection device capable of reducing detection errors due to variations of eyes among individuals
US5634141A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 1995 |
| Grant date | May 27, 1997 |
| Priority date | — |
| Expiry date | May 16, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2213/025
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A visual axis detection apparatus including a correction data storage section to store the correction data to correct errors in the detected visual information; an individual variation correction data detection system to detect the individual variation data related to the visual axis of an observer; a correction data updating section to update the correction data on the basis of the new individual variation data detected by the individual variation detection system and the correction data stored in the correction data storage section; and a visual axis correction section to correct the detected visual axis by use of the correction data updated by the correction data updating section and stored in the correction data storage section. The apparatus adds a weight to the already stored correction data in accordance with the individual variation data when obtaining individual variation data anew, and uses this weighted data as the correction data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.