Verily Life Sciences LLC

Twenty Twenty Therapeutics LLC

Tong Zhang

Shungneng Lee

Robert Francis Wiser

Grant Smith

Grant Anderson

A contact lens system includes a shared antenna electrode, an accommodation actuator to provide variable optical power, and a controller coupled to the accommodation actuator and the shared antenna electrode. The controller including logic for arbitrating access to the shared antenna electrode between an impedance sensor and a communication circuit; selectively establishing an oscillator with the impedance sensor and the shared antenna electrode; correlating an oscillation condition of the oscillator to an accommodation setting; and adjusting the variable optical power of the accommodation actuator based upon the accommodation setting. An impedance across the shared antenna electrode varies based upon an amount an eyelid overlaps the contact lens system when the contact lens system is worn on an eye.

Impedance sensor for ophthalmic device using shared antenna electrode

An apparatus with a built-in self-test includes a sensor electrode, an impedance sensor coupled to the sensor electrode to measure a test impedance of the sensor electrode as influenced by an external load, a secondary electrode disposed adjacent to the sensor electrode to inductively couple with the sensor electrode and influence the external load on the sensor electrode, a first switch coupled to the secondary electrode to selectively change a second impedance of the secondary electrode, and a controller coupled to the impedance sensor and the first switch. The controller includes logic for adjusting the first switch to wirelessly load the sensor electrode with the secondary electrode in a predetermined impedance state, measuring the test impedance with the impedance sensor while the secondary electrode is in the predetermined impedance state, and comparing the measured test impedance against a threshold impedance range to perform a self-test.

Wirelessly loaded impedance sensor for self-test

One illustrative example includes wireless device having a first wake-up receiver and a second wake-up receiver. The first wake-up receiver can detect a first wake-up signal within a first group of wireless signals and responsively activate the second wake-up receiver. The second wake-up receiver can then detect a second wake-up signal within a second group of wireless signals and responsively activate a transceiver, where the transceiver is usable to engage in bidirectional communication with a remote device.

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San Mateo, CA, United States of America

Tong Zhang