Patent ID: 11880111
Assignee: APPLE INC.
Field: Optics (Instruments)
Classification: CPC G  H | IPC G

Claim 16:
17. Eyeglasses, comprising:
a housing;
an adjustable lens in the housing having a liquid crystal cell, an array of electrodes, and control lines that apply voltages to the array of electrodes to adjust a phase profile of the liquid crystal cell; and
off-lens control circuitry in the housing having an operational amplifier that receives a feedback voltage from the adjustable lens and that provides an output voltage to a given one of the control lines based on the feedback voltage and based on a selected input voltage that is generated by the off-lens control circuitry, wherein the adjustable lens comprises first and second variable-resistance conductive paths and a switch coupled between the first and second variable-resistance conductive paths, wherein each of the first and second variable-resistance conductive paths is coupled to a respective subset of the electrodes, and wherein a given one of the first and second variable-resistance conductive paths receives the output voltage from the given one of the control lines.