Patent ID: 11927867
Assignee: VIEW, INC.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 22:
23. A controller for controlling an optical state of an optically switchable device, the controller comprising:
circuitry for applying voltage or providing instructions to apply voltage between bus bars on the optically switchable device, wherein the bus bars are electrically connected with transparent conductive layers of the optically switchable device; and
a processing component configured to cause:
supplying an applied voltage (Vapp) to the bus bars to transition the optically switchable device from a first optical state to a second optical state,
wherein the Vapp is supplied such that Vmin<(Vapp−0.5RJL2)<Vmax for all local positions between the bus bars on the optically switchable device, where
R is a sheet resistance of the transparent conductive layers,
J is a local current density on the optically switchable device,
L is an effective separation distance between the bus bars,

Vmin is a minimum operating voltage to effect the transition from the first optical state to the second optical state on the optically switchable device, and
Vmax is a maximum safe operating voltage of the optically switchable device that will not damage the optically switchable device.