Transparent window panel with a field of view that can be partially darkened and method of controlling a surface element that can be electrochromically lightened inside a transparent window panel
First Claim
1. A transparent glazing with a field of view that can be darkened over a portion of its surface by electrically controlling at least one functional element incorporated into a multilayer composite, the light transmission of which glazing can be varied reversibly, in which portion the functional element comprises:
- at least one electrochromic functional layer enclosed between two surface electrodes,wherein each surface electrode of the functional element, and leads corresponding thereto, are matched and spatially spaced relative to the other surface electrode such that darkening starts at one edge of the functional element and, with a continuously-applied voltage applied between the surface electrodes, propagates continuously over the surface of the functional element until the functional element is completely and uniformly colored.
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Accused Products
Abstract
A transparent glazing, and a control method thereof, with a field of view that can be darkened over a portion of its surface by electrically controlling at least one functional element incorporated into a multilayer composite, the light transmission of which glazing can be varied reversibly. The functional element, for example a solid-state electrochromic multilayer system, includes at least one electrochromic functional layer enclosed between two surface electrodes. The surface electrodes and their leads are matched to one another and spaced spatially with respect to one another such that darkening starts at one edge of the functional element and, with a remaining voltage applied between the surface electrodes, propagates continuously over the surface of the functional element until it is completely and uniformly colored. The glazing can be used as an electrically controllable sunshield for windshields of vehicles or the like.
46 Citations
18 Claims
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1. A transparent glazing with a field of view that can be darkened over a portion of its surface by electrically controlling at least one functional element incorporated into a multilayer composite, the light transmission of which glazing can be varied reversibly, in which portion the functional element comprises:
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at least one electrochromic functional layer enclosed between two surface electrodes, wherein each surface electrode of the functional element, and leads corresponding thereto, are matched and spatially spaced relative to the other surface electrode such that darkening starts at one edge of the functional element and, with a continuously-applied voltage applied between the surface electrodes, propagates continuously over the surface of the functional element until the functional element is completely and uniformly colored. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for controlling a functional element in an all-solid-state electrochromic surface element in a transparent glazing unit, which all-solid-state surface element includes a functional layer that can be reversibly decolored electrochromically, the method comprising:
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introducing, between two surface electrodes, an electrical potential to force an electrochromic change of color on one side of the electrochromic surface element, a direction of propagation of a change of color of the electrochromic surface element being controlled by an increase in an electrical potential on a surface of one surface electrode relative to the other surface electrode, wherein each of the two surface electrodes has a different surface resistance and a rate of increase of the electrical potential depends on the surface resistance of each of the two surface electrodes. - View Dependent Claims (16, 17, 18)
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Specification