Facilitation of temperature compensation for contact lens sensors and temperature sensing
View Patent ↗Apparatus, systems and methods employing contact lens sensors are provided. In some aspects, a contact lens includes a substrate and a circuit. The circuit can include: one or more sensors disposed on or within the substrate, that sense a feature associated with a wearer of the contact lens; and a compensation circuit disposed on or within the substrate, coupled to the sensor(s) and that outputs information to adjust an output of the sensor(s). The compensation circuit can include: a temperature component that senses the temperature of the sensor(s); and a communication component that outputs information indicative of the temperature of the sensor(s), and receives information associated with adjusting the output of the sensor(s). In other aspects, a contact lens includes a circuit that senses the body temperature, or ambient temperature outside of the body, of the contact lens wearer. Sensor fusion and/or calibration can be performed based on the information.
1. A contact lens, comprising:
a substrate; and
a circuit comprising:
a sensor disposed on or within the substrate, wherein the sensor is configured to sense a biological feature and to provide a sensor output indicative of a sensed value of the biological feature, wherein the sensed value is dependent on a temperature of the sensor; and
a compensation circuit disposed on or within the substrate and coupled to the sensor, wherein the compensation circuit comprises:
a temperature component configured to sense the temperature of the sensor;
an adjustment component configured to generate an adjusted sensor output indicative of a corrected value of the biological feature based on the sensor output and on adjustment information, wherein the adjustment information compensates for dependence of the sensed value on the temperature of the sensor; and
a communication component, wherein the communication component is configured to transmit information indicative of the adjusted sensor output to a device external to the contact lens.
2. The contact lens of claim 1 , wherein the biological feature is at least one of a glucose level, alcohol level, histamine level, urea level, lactate level or cholesterol level.
3. The contact lens of claim 1 , wherein the biological feature is at least one of a sodium ion level, potassium ion level, calcium ion level or magnesium ion level.
4. The contact lens of claim 1 , wherein the communication component is further configured to transmit information indicative of the temperature of the sensor to the device external to the contact lens and to receive the adjustment information from the device external to the contact lens.
5. The contact lens of claim 1 , wherein the compensation circuit further comprises:
an evaluation component configured to generate the adjustment information based on the temperature of the sensor.
6. A method, comprising:
sensing, by a sensor in a contact lens, a biological feature to provide a sensor output indicative of a sensed value of the biological feature, wherein the sensed value is dependent on a temperature of the sensor;
determining a temperature of the sensor;
transmitting, from the contact lens to a device external to the contact lens, information indicative of the temperature of the sensor;
receiving, at the contact lens from the device external to the contact lens, adjustment information, wherein the adjustment information compensates for dependence of the sensed value on the temperature of the sensor;
generating an adjusted sensor output based on the sensor output and the adjustment information, wherein the adjusted sensor output is indicative of a corrected value of the biological feature; and
transmitting, from the contact lens to a device external to the contact lens, information indicative of the adjusted sensor output.
7. The method of claim 6 , wherein the biological feature comprises at least one of a glucose level, alcohol level, histamine level, urea level, lactate level or cholesterol level of the wearer of the contact lens.
8. The method of claim 6 , wherein the biological feature comprises at least one of a sodium ion level, potassium ion level, calcium ion level or magnesium ion level of the wearer of the contact lens.