Electrochromatic glazings
First Claim
1. An electrochromatic glazing system comprising:
- a first glass sheet covered with a first transparent electrically conductive film;
a second glass sheet covered with a second transparent electrically conductive film;
a film of an electromagnetic material;
an electrolyte having a temperature; and
a counterelectrode;
wherein the film of electrochromatic material, the electrolyte, and the counterelectrode are interposed between the first and second transparent electrically conductive films;
wherein the first and second electrically conductive films are connected to a voltage generator by an electrical control circuit;
wherein the voltage generator receives a set-point value from a control unit equipped with a memory and generates a potential difference U1 as a function of the temperature of the electrolyte;
wherein application of a potential difference beyond a maximum potential difference will result in degradation of the system;
wherein the voltage generator generates potential difference u1s for a short time period before generating said potential difference U1, the intermediate potential difference u1s being less than or equal to, in absolute value, the maximum potential difference;
wherein the potential difference u1s has a corresponding intermediate current density i1s that is simultaneously measured; and
wherein the current density i1s is used by the control unit for selecting the potential difference U1 to be generated.
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Accused Products
Abstract
An electrochromatic glazing system is provided. The system comprises a first glass sheet covered with a first transparent electrically conductive film and a second glass sheet covered with a second transparent electrically conductive film. A film of electrochromatic material, an electrolyte, and a counterelectrode are interposed between the first and second transparent electrically conductive films. The first and second electrically conductive films are connected to a voltage generator by an electrical control circuit and the voltage generator receives a set-point value from a control unit equipped with a memory and generates a potential difference as a function of the temperature of the electrolyte.
63 Citations
24 Claims
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1. An electrochromatic glazing system comprising:
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a first glass sheet covered with a first transparent electrically conductive film; a second glass sheet covered with a second transparent electrically conductive film; a film of an electromagnetic material; an electrolyte having a temperature; and a counterelectrode; wherein the film of electrochromatic material, the electrolyte, and the counterelectrode are interposed between the first and second transparent electrically conductive films; wherein the first and second electrically conductive films are connected to a voltage generator by an electrical control circuit; wherein the voltage generator receives a set-point value from a control unit equipped with a memory and generates a potential difference U1 as a function of the temperature of the electrolyte; wherein application of a potential difference beyond a maximum potential difference will result in degradation of the system; wherein the voltage generator generates potential difference u1s for a short time period before generating said potential difference U1, the intermediate potential difference u1s being less than or equal to, in absolute value, the maximum potential difference; wherein the potential difference u1s has a corresponding intermediate current density i1s that is simultaneously measured; and wherein the current density i1s is used by the control unit for selecting the potential difference U1 to be generated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An electrochromatic glazing system comprising:
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a first glass sheet covered with a first transparent electrically conductive film; a second glass sheet covered with a second transparent electrically conductive film; a film of an electrochromatic material; an electrolyte having a temperature; and a counterelectrode; wherein the film of electrochromatic material, the electrolyte, and the counterelectrode are interposed between the first and second transparent electrically conductive films; and means for electrically connecting the first and second electroconductive films to a voltage generator, said electrical connecting means including means for storing information corresponding to a desired degree of coloration of the glazing; and means for controlling the voltage generator to generate a voltage between the first and second electroconductive film as a function of the temperature of the electrolyte, thus obtaining the desired degree of coloration of the glazing. - View Dependent Claims (14, 15, 16, 17)
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18. An electrochromic glazing system comprising:
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a first glass sheet covered with a first transparent electrically conductive film; a second glass sheet covered with a second transparent electrically conductive film; a film of electrochromic material interposed between said first and second electrically conductive films; an electrolyte having a temperature and being interposed between said first and second electrically conductive films; an counterelectrode interposed between said first and second electrically conductive films; means for measuring the temperature of said electrolyte; means for supplying a set point value corresponding to a value of potential difference as a function of the temperature of said electrolyte; and means for initiating a switching phase by generating a potential difference U1 in accordance with said set point value, said initiating means receiving said set point value from said supplying means and interconnecting said first and second transparent electrically conductive films; wherein said electrochromic film is adapted to be switched from a state of coloration to a state of decoloration in a first switching phase, and from a state of decoloration to coloration in a second switching phase. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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Specification