Electrically heatable laminated window
First Claim
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1. A transparent, laminated window having improved defrosting capability and reduced oblique viewing angle color reflectance comprising:
- (A) an optical element having a sheet resistivity less than about 6 ohms per square and less than about 11% normal incidence reflection of at any wavelength between 400 and 700 nm, containing;
(i) at least two transparent, electrically conductive layers, each having a thickness of less than 150 angstroms;
(ii) at least one dielectric layer between said conductive layers;
(iii) a transparent substrate; and
(B) a bus bar electrically conductively associated with each conductive layer.
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Abstract
A transparent, laminated window, particularly for use as a vehicle windshield, has improved deicing capability and high luminous transmission and near IR rejection, comprises an optical element having a low sheet resistivity of less than about 6 ohms per square and less than about 11% normal incidence reflection of 400-700 nm wavelength light, such element containing at least two transparent metal layers less than 150A thick which are electrically conductively associated with bus bar(s) and separated by one or more dielectric layers.
114 Citations
8 Claims
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1. A transparent, laminated window having improved defrosting capability and reduced oblique viewing angle color reflectance comprising:
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(A) an optical element having a sheet resistivity less than about 6 ohms per square and less than about 11% normal incidence reflection of at any wavelength between 400 and 700 nm, containing; (i) at least two transparent, electrically conductive layers, each having a thickness of less than 150 angstroms; (ii) at least one dielectric layer between said conductive layers; (iii) a transparent substrate; and (B) a bus bar electrically conductively associated with each conductive layer. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A transparent, laminated window capable of transmitting at least 70% of visible light and having improved defrosting capability and reduced oblique viewing angle color reflectance comprising:
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(A) an optical element having a sheet resistivity less than about 3 ohms per square and less than 11% normal incidence reflection at any wavelength between 400 and 700 nm light, said optical element comprising; (i) at least two silver layers, each having a thickness of 100-130 angstroms; (ii) at least one dielectric layer between said silver layers; (iii) at least one dielectric layer against the exterior surfaces of the silver layers opposite to those in contact with the layers of (ii); (iv) a transparent substrate; and (B) a bus bar electrically conductively associated with each silver layer.
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Specification