IP Library › Granted Patent US 12,461,419
Granted Patent B2
US 12,461,419 · App. 18/367,607 · Granted Nov 4, 2025

Controller for optically-switchable windows

Inventor: Stephen Clark Brown (San Mateo, CA)
Assignee: View Operating Corporation
G02F1/163E06B9/24G05B13/024E06B2009/2464
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Quick Facts
Patent No.
US 12,461,419
App. No.
18/367,607
Granted
Nov 4, 2025
Kind
B2
Abstract

This disclosure provides a window controller that includes a command-voltage generator that generates a command voltage signal, and a pulse-width-modulated-signal generator that generates a pulse-width-modulated signal based on the command voltage signal. The pulse-width-modulated signal drives an optically-switchable device. The pulse-width-modulated signal comprises a first power component having a first duty cycle and a second power component having a second duty cycle. The first component delivers a first pulse during each active portion of the first duty cycle, and the second component delivers a second pulse during each active portion of the second duty cycle. The first pulses are applied to a first conductive layer and the second pulses are applied to a second conductive layer. The relative durations of the active portions and the relative durations of the first and second pulses are adjusted to result in a change in an effective DC voltage applied across the optically-switchable device.

Claims (32)

1 . An apparatus for tinting one or more tintable windows, the apparatus comprising at least one controller that is configured to:

operatively couple to one or more sensors comprising a temperature sensor;

operatively couple to the one or more tintable windows;

determine a drive parameter based at least in part on data from the one or more sensors;

compare the drive parameter with sets of stored power profiles arranged in an n-dimensional data structure of data elements, each data element of the data elements corresponding to a respective power profile of stored power profiles and each dimension of the n-dimensional data structure corresponding to a different drive parameter, wherein a first dimension corresponds to target transmissivity values and a second dimension corresponds to current transmissivity values; and

utilize-the comparison to identify a stored power profile of the stored power profiles that corresponds to the drive parameter, wherein the stored power profile identified is utilized to alter tint of the one or more tintable windows.

2 . The apparatus of claim 1 , wherein the n-dimensional data structure comprises at least three dimensions.

3 . The apparatus of claim 1 , wherein at least one dimension of the n-dimensional data structure corresponds to temperature.

4 . The apparatus of claim 2 , wherein the one or more tintable windows comprise at least two tintable windows, and wherein the at least one controller is further configured to:

receive first drive parameters from a first tintable window of the at least two tintable windows and second drive parameters from a second tintable window of the at least two tintable windows, wherein the first drive parameters indicate material properties of the first tintable window and the second drive parameters indicate material properties of the second tintable window, and

compare the first drive parameters and the second drive parameters to generate a comparison for altering tint of at least one tintable window of the at least two tintable windows.

5 . The apparatus of claim 4 , wherein the material properties comprise: a size of the at least two tintable windows, a shape of the at least two tintable windows, a thickness of the at least two tintable windows, an age of the at least two tintable windows, or a number of cycles experienced by the at least two tintable windows.

6 . A system for tinting one or more tintable windows, the system comprising:

a network that is configured to:

operatively couple to the one or more tintable windows;

operatively couple to one or more sensors comprising a temperature sensor or a photodetector;

operatively couple to at least one database comprising sets of stored power profiles arranged in an n-dimensional data structure of data elements, each data element of the data elements corresponding to a respective power profile of stored power profiles and each dimension of the n-dimensional data structure corresponding to a different drive parameter, wherein at least one dimension of the n-dimensional data structure is temperature or a temperature range, and wherein the n-dimensional data structure comprises a first dimension corresponding to target transmissivity values and a second dimension corresponds to current transmissivity values;

transmit a determination of a drive parameter based at least in part on data from the one or more sensors;

transmit a comparison of the drive parameter with the sets of stored drive parameters; and

transmit an identification of a stored power profile of the stored power profiles that corresponds to the drive parameter, wherein the stored power profile is identified using the comparison, and wherein the stored power profile identified is utilized to alter tint of the one or more tintable windows.

7 . The system of claim 6 , wherein the n-dimensional data structure comprises at least three dimensions.

8 . The system of claim 6 , wherein the network is configured to utilize a wireless communication protocol to receive and/or transmit signals, wherein the wireless communication optionally abides by one or more wireless communication protocols comprising WiFi, Bluetooth, Zigbee, or EnOcean.

9 . The system of claim 6 , wherein the network is configured for wired communication.

10 . The system of claim 6 , wherein the network is configured for power transmittance, and is operatively coupled to a power source.

11 . An apparatus for controlling tint of a plurality of tintable windows, the apparatus comprising at least one controller that is configured to:

operatively couple to the plurality of tintable windows;

receive first drive parameters from a first tintable window of the plurality of tintable windows and second drive parameters from a second tintable window of the plurality of tintable windows, wherein the first drive parameters indicate material properties of the first tintable window and the second drive parameters indicate material properties of the second tintable window;

compare the first drive parameters and the second drive parameters to generate a comparison;

if the comparison indicates that the first and second tintable windows are compatible, then tint the first tintable window and the second tintable window using the drive parameters of the first or second tintable window that has the smaller size as indicated by the received material properties; and

if the comparison indicates that the first and second tintable windows are not compatible, then tint the first tintable window or the second tintable window based at least in part on that window's reported drive parameters.

12 . The apparatus of claim 11 , wherein the material properties comprise: a size of the one or more tintable windows, a shape of the one or more tintable windows, a thickness of the one or more tintable windows, an age of the one or more tintable windows, or a number of cycles experienced by the one or more tintable windows.

13 . The apparatus of claim 11 , wherein the at least one controller is further configured to determine safety parameters for the first tintable window and the second tintable window based at least in part on the comparison.

Assignments (4)
MERGER AND CHANGE OF NAME Recorded Aug 28, 2025
From: VIEW, INC.; PVMS MERGER SUB, INC.; VIEW, INC.
To: VIEW OPERATING CORPORATION
Reel/Frame 076090/0186 →
MERGER AND CHANGE OF NAME Recorded Dec 19, 2024
From: VIEW, INC.; PVMS MERGER SUB, INC.; VIEW OPERATING CORPORATION
To: VIEW OPERATING CORPORATION
Reel/Frame 069743/0586 →
CHANGE OF NAME Recorded Nov 16, 2023
From: SOLADIGM, INC.
To: VIEW, INC.
Reel/Frame 065602/0164 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 30, 2023
From: BROWN, STEPHEN C.
To: SOLADIGM, INC.
Reel/Frame 065392/0976 →
Continuity (4)
Continuation 16948341 · Sep 14, 2020
Continuation 15882719 · Jan 29, 2018
Continuation 13449248 · Apr 17, 2012
Related Publication 20240077780A1 · Mar 7, 2024
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