1. Eye-tracker chip development
Tobi Delbruck
Partner UNIZH
Institute of Neuroinformatics (INI)
University&ETH Zürich, Switzerland

2. INI = Inst. of Neuroinformatics
Studies brain computation with aim of turning it into technology
Anatomy, physiology, psychophysics, modeling, robotics, neuromorphic chip design
Tobi Delbruck – partner UNIZH, Zurich

3. A pidgin vocabulary of neuromorphic circuits

4. Time-derivative imager

5. Photoreceptor has low DC gain, high transient gain

6. 160x120 Adaptive Photoreceptor Array
Adapted, low DC gain has made image fade away

7. We move imager

8. Slow adaptation—becomes a log-domain imager

9. Rapid adaptation—becomes a temporal differentiator

10. Vertical motion detectors for blink detection
Average location of radial light-to-dark edges for eye position

11. Desired characteristics of eye tracker chip
On-eye, close proximity
Ultra low power and compact
High temporal resolution but lower spatial resolution
Will require online calibration