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Communication Dans Un Congrès Année : 2022

A 0.35-μm subthreshold CMOS ASIC for a Smart Contact Lens Eye-Tracker

Résumé

This paper describes a camera-less eye-tracker using an instrumented contact lens fitted with photodetectors and illuminated by eyewear. The gaze direction is computed on the lens using the photo-currents by means of a mixed signal 0.35−μm CMOS ASIC. NFC is used to power the ASIC and to transmit the gaze direction to the eyewear. Experimental measurements are performed using a prototype scleral contact lens mounted on a mock-up eye. The measurements show that an accuracy of 0.2∘ is achievable, i.e. 2.5 times better than current mobile video-based eye-trackers, for a power consumption of 170 μW. Several tests were carried out on several ASICs, demonstrating system reliability despite process variations, operating time, and supply voltage variations.
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Dates et versions

hal-03851970 , version 1 (14-11-2022)

Identifiants

Citer

Loïc Massin, Fabrice Seguin, Vincent Nourrit, Emmanuel Daniel, Camilla Kärnfelt, et al.. A 0.35-μm subthreshold CMOS ASIC for a Smart Contact Lens Eye-Tracker. ISCAS 2022: IEEE International Symposium on Circuits and Systems, May 2022, Austin, United States. pp.1140-1144, ⟨10.1109/ISCAS48785.2022.9937413⟩. ⟨hal-03851970⟩
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