Heatable lens for luminaires, and/or methods of making the same
First Claim
1. A lens for a lighting system, comprising:
- a glass substrate supporting an antireflective coating and a transparent conductive coating on first and second major surfaces thereof, respectively; and
at least one bus bar in electrical communication with the transparent conductive coating, the at least one bus bar being configured to convey voltage to the transparent conductive coating from an external power source to, in turn, cause the transparent conductive coating to heat up,wherein the antireflective and transparent conductive coatings are sputtered coatings,wherein the substrate is heat treated together with the antireflective and transparent conductive coatings thereon; and
wherein the transparent conductive coating comprises a layer comprising a transparent conductive oxide (TCO) sandwiched between first and second layers comprising silicon oxynitride.
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Accused Products
Abstract
Certain example embodiments of this invention relate to heatable glass substrates that may be used in connection with lighting applications, and/or methods of making the same. In certain example embodiments, a glass substrate supports an antireflective (AR) coating on a first major surface thereof, and a conductive coating on a second, opposite major surface thereof. Bus bars connect the conductive coating to a power source in certain example embodiments. The substrate may be heat treated (e.g., heat strengthened and/or thermally tempered), with one or both coatings thereon. The heatable glass substrate thus may help provide a chemical and/or environmental barrier for the luminaire or lighting system disposed behind it. In addition, or in the alternative, the heatable glass substrate may help reduce the amount of moisture (e.g., snow, rain, ice, fog, etc.) that otherwise could accumulate on the luminaire or lighting system.
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Citations
27 Claims
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1. A lens for a lighting system, comprising:
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a glass substrate supporting an antireflective coating and a transparent conductive coating on first and second major surfaces thereof, respectively; and at least one bus bar in electrical communication with the transparent conductive coating, the at least one bus bar being configured to convey voltage to the transparent conductive coating from an external power source to, in turn, cause the transparent conductive coating to heat up, wherein the antireflective and transparent conductive coatings are sputtered coatings, wherein the substrate is heat treated together with the antireflective and transparent conductive coatings thereon; and wherein the transparent conductive coating comprises a layer comprising a transparent conductive oxide (TCO) sandwiched between first and second layers comprising silicon oxynitride. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A lighting system, comprising:
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one or more solid state lights; a lens comprising;
a glass substrate supporting an antireflective coating and a transparent conductive coating on first and second major surfaces thereof, respectively; and
at least one bus bar in electrical communication with the transparent conductive coating, the at least one bus bar being configured to convey voltage to the transparent conductive coating from an external power source to, in turn, cause the transparent conductive coating to heat up, wherein the antireflective and transparent conductive coatings are sputtered coatings;wherein the lens is interposed between the one or more solid state lights and a viewer of the lighting system; and a power source operable to drive the conductive coating of the lens at a power density of 1-6 W/in2. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A lens for a lighting system, comprising:
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a glass substrate supporting an antireflective coating and a transparent conductive coating on first and second major surfaces thereof, respectively; and at least one bus bar in electrical communication with the transparent conductive coating, the at least one bus bar being configured to convey voltage to the transparent conductive coating from an external power source to, in turn, cause the transparent conductive coating to heat up, wherein the antireflective and transparent conductive coatings are sputtered coatings, wherein the substrate is heat treated together with the antireflective and transparent conductive coatings thereon; and wherein the antireflective coating comprises, in order moving away from the substrate;
a layer comprising silicon oxynitride;
a layer comprising titanium oxide; and
a layer comprising silicon oxide.
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Specification