Multipurpose controller for multistate windows
First Claim
1. A window controller for controlling one or more windows capable of undergoing reversible optical transitions, the window controller comprising one or more microprocessors configured to control functions comprising:
- measuring transmittance of at least one of the one or more windows;
actively and reversibly powering a reversible optical transition between at least a bleached end state and a colored end state of the at least one of the one or more windows, wherein powering is based on the measured transmittance of the at least one window, wherein the at least one window comprises a first conductive layer, a second conductive layer, and an electrochromic layer between the first conductive layer and the second conductive layer, wherein powering the reversible optical transition comprises applying a DC voltage to the first conductive layer and to the second conductive layer to provide an electrical potential across the electrochromic layer establishing a load, wherein the load is floated; and
communicating between the window controller and a separate communication node.
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Accused Products
Abstract
Controllers for providing functions for windows capable of undergoing reversible optical transitions. In some cases, the controllers have multiple features that can sense and adapt to local environmental conditions. The controllers can be integrated with a building management system (BMS) to greatly enhance the BMS'"'"'s effectiveness at managing local environments in a building. For example, controllers may control one or more functions such as powering a smart window, determining the percent transmittance, size, and/or temperature of a smart window, providing wireless communication between the controller and a separate communication node, etc.
254 Citations
38 Claims
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1. A window controller for controlling one or more windows capable of undergoing reversible optical transitions, the window controller comprising one or more microprocessors configured to control functions comprising:
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measuring transmittance of at least one of the one or more windows; actively and reversibly powering a reversible optical transition between at least a bleached end state and a colored end state of the at least one of the one or more windows, wherein powering is based on the measured transmittance of the at least one window, wherein the at least one window comprises a first conductive layer, a second conductive layer, and an electrochromic layer between the first conductive layer and the second conductive layer, wherein powering the reversible optical transition comprises applying a DC voltage to the first conductive layer and to the second conductive layer to provide an electrical potential across the electrochromic layer establishing a load, wherein the load is floated; and communicating between the window controller and a separate communication node. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A method of controlling systems in a building by a building management system, the method comprising:
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using transmittance data, by a window controller, from one or more windows in the building, the one or more windows capable of undergoing reversible optical transitions between at least bleached end states and colored end states in the building, wherein the measured transmittance data is used as input for adjusting at least one other system of the building, said other system selected from the group consisting of HVAC, lighting, security, power, fire suppression and elevator control; and actively and reversibly powering a reversible optical transition between at least a bleached end state and a colored end state of at least one of the one or more windows, wherein powering is based on the measured transmittance data of the at least one window, wherein the at least one window comprises a first conductive layer, a second conductive layer, and an electrochromic layer between the first conductive layer and the second conductive layer, wherein powering the reversible optical transition comprises applying a DC voltage to the first conductive layer and to the second conductive layer to provide an electrical potential across the electrochromic layer establishing a load, wherein the load is floated. - View Dependent Claims (24, 25, 26, 27)
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28. A window controller for controlling one or more windows capable of undergoing reversible optical transitions, the window controller comprising one or more microprocessors configured to control functions of the one or more windows, the functions comprising:
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(a) measuring transmittance of at least one of the one or more windows based on current information measured at the at least one window; (b) actively and reversibly powering a reversible optical transition between at least a bleached end state and a colored end state of the at least one window, wherein powering is based on the measured transmittance of the at least one window, wherein the at least one or more windows comprises a first conductive layer, a second conductive layer, and an electrochromic layer between the first conductive layer and the second conductive layer, wherein powering the reversible optical transition comprises applying a DC voltage to the first conductive layer and to the second conductive layer to provide an electrical potential across the electrochromic layer establishing a load, wherein the load is floated; and (c) communicating between the window controller and a separate communication node. - View Dependent Claims (29, 30, 31, 32, 33, 34)
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35. A window controller for controlling a window capable of undergoing reversible optical transitions, the window controller comprising:
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a voltage regulator; a voltage control amplifier for generating current to power the window; and a microprocessor powered by the voltage regulator, the microprocessor configured to control the functions of; actively and reversibly powering a reversible optical transition between at least a bleached end state and a colored end state of the window based on window data received from memory embedded in the window and separate from the window controller, wherein the window data includes measured transmittance of the window, wherein the window comprises a first conductive layer, a second conductive layer, and an electrochromic layer between the first conductive layer and the second conductive layer, wherein powering comprises applying a DC voltage to the first conductive layer and to the second conductive layer to provide an electrical potential across the electrochromic layer establishing a load, wherein the load is floated; communicating between the window controller and a separate communication node; and storing the window data to the memory. - View Dependent Claims (36, 37, 38)
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Specification