Back to results
US 10,948,797 B2Granted
Controlling transitions in optically switchable devices
AssigneeView, Inc.
InventorAnshu A. Pradhan
Life of this patent
Estimating the term…
Abstract
The embodiments herein relate to methods for controlling an optical transition in an optically switchable device, and optically switchable devices configured to perform such methods. In various embodiments, non-optical (e.g., electrical) feedback is used to help control an optical transition. The feedback may be used for a number of different purposes. In many implementations, the feedback is used to control an ongoing optical transition.
Claims16
A method of controlling an optical transition of an optically switchable device, the method comprising:
- (a) applying a voltage and/or a current for driving a first optically switchable device to transition from a starting optical state to an ending optical state, wherein the voltage applied and/or the current applied is applied to one or more bus bars of the first optically switchable device;
- (b) before the transition is complete, determining an electrical characteristic of the first optically switchable device to generate a determined electrical characteristic of the first optically switchable device;
- and
- (c) responsive to the determined electrical characteristic:
- (i) ramping, over time, the applied voltage at a voltage ramp rate to a target voltage value;
- and
- (ii) making an adjustment to the voltage ramp rate, to maintain the determined electrical characteristic between threshold levels, wherein the adjustment comprises:
- stopping the ramping, reversing the direction of the ramping, decreasing the voltage ramp rate, or increasing the voltage ramp rate;
- and
- substantially matching, during the transition, a tint level of the first optically switchable device to a tint level of a second optically switchable device proximate the first optically switchable device.
7 more elements
Dependencies are inferred from the claim text.