Multi-segment electro-optic apparatus and control methods

A method for controlling an electro-optic device comprising:

• supplying a driving control signal to at least one of a first electrode and a second electrode of the electro-optic device;
• conducting current across an electro-optic medium between the first electrode and the second electrode;
• monitoring a measured control signal of at least one third electrode conductively connected to one of the first electrode and the second electrode;
• and
• adjusting the driving control signal based on the measured control signal thereby updating a corresponding transmission state of the electro-optic device to a target transmittance.

An electro-optic device comprising:

• a first electrode electrically connecting with a power supply circuitry;
• a second electrode spaced from the first electrode and electrically connecting with the power supply circuitry;
• an electro-optic medium disposed between the first electrode and the second electrode;
• at least one third electrode disposed between the first electrode and the second electrode and electrically connecting with one of the first electrode and the second electrode via a switching circuitry;
• and
• control circuitry in communication with the switching circuitry that controls the switching circuitry to adjust an electrical current through the first electrode, the electro-optic medium, and the second electrode.