Controlling transitions in optically switchable devices
First Claim
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1. A method of maintaining substantially matching tint levels or tint rates in a plurality of electrochromic (EC) windows, the method comprising:
- (a) probing the plurality of EC windows to determine an electrical response for each window, each electrical response having a magnitude;
(b) analyzing the magnitude of the determined electrical responses for the plurality of EC windows;
(c) based on the magnitudes of the determined electrical responses, scaling a voltage or current applied to one or more of the plurality of EC windows to thereby match the tint levels or tint rates in each of the plurality of EC windows.
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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.
204 Citations
8 Claims
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1. A method of maintaining substantially matching tint levels or tint rates in a plurality of electrochromic (EC) windows, the method comprising:
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(a) probing the plurality of EC windows to determine an electrical response for each window, each electrical response having a magnitude; (b) analyzing the magnitude of the determined electrical responses for the plurality of EC windows; (c) based on the magnitudes of the determined electrical responses, scaling a voltage or current applied to one or more of the plurality of EC windows to thereby match the tint levels or tint rates in each of the plurality of EC windows.
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2. A method of transitioning a plurality of electrochromic (EC) windows at substantially matching tint rates, the method comprising:
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(a) determining a transition time over which the plurality of EC windows are to be transitioned from a starting optical state to an ending optical state, wherein the transition time is based, at least in part, on a minimum time over which a slowest transitioning window in the plurality of EC windows transitions from the starting optical state to the ending optical state; (b) applying one or more drive conditions to each of the windows in the plurality of windows, wherein the one or more drive conditions applied to each window are sufficient to cause each window to transition from the starting optical state to the ending optical state within the transition time. - View Dependent Claims (3, 4, 5, 6, 7, 8)
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Specification