Apparatus for tracking the human eye with a retinal scanning display, and method thereof
US6120461A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 9, 1999 |
| Grant date | Sep 19, 2000 |
| Priority date | — |
| Expiry date | Aug 9, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B3/112
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A retinal scanning display, an active-pixel image sensor array, and an im processor track the movements of the human eye. The scanning nature of the display acts as a sequential source of eye illumination. The active-pixel image sensor array is directed toward the cornea of the eye through a matrix of micro-lens. The sensor is integrated with a comparator array which is interfaced to bilateral switches. An element address encoder and latch determines the sensor element which reaches maximum intensity during the raster-scan period of the display driver. Over a display field refresh cycle, the invention maps the corneal surface to a data table by pairing sensor activations to the specular reflections from the cornea of the sequenced source lights.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.