Heatable glazing panel
First Claim
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1. An electrically heatable glazing panel comprising a substrate and at least two electrically heatable zones, each electrically heatable zone comprising:
- i) a substantially transparent, electrically conductive coating layer, ii) spaced bus bars adapted to supply electrical voltage across the substantially transparent, electrically conductive coating layer, and iii) a conductive path defined between the bus bars, in which, at at least one of the electrically heatable zones the conductive path changes direction at least once along its length within the electrically conductive coating layer so as to double back upon itself.
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Abstract
The present invention relates to an electrically heatable glazing panel comprising a substantially transparent, electrically conductive coating layer which is adapted to be electrically heatable and is divided into at least two zones, each zone comprising a pair of spaced bus bars and a conductive path located between the pair of spaced bus bars. The glazing panel according to the invention is preferably a side window of a vehicle which may be used for de-misting or de-icing purposes.
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Citations
29 Claims
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1. An electrically heatable glazing panel comprising a substrate and at least two electrically heatable zones, each electrically heatable zone comprising:
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i) a substantially transparent, electrically conductive coating layer, ii) spaced bus bars adapted to supply electrical voltage across the substantially transparent, electrically conductive coating layer, and iii) a conductive path defined between the bus bars, in which, at at least one of the electrically heatable zones the conductive path changes direction at least once along its length within the electrically conductive coating layer so as to double back upon itself. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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9. An electrically heatable glazing panel according to claim 9 in which the one or more zone boundaries have a width of less than 150 μ
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21. An electrically heatable glazing panel comprising
spaced first, second and third electrical bus bars arranged in order at and along an edge of the glazing panel a first electrically heatable pathway defined between the first and the second bus bars a second electrically heatable pathway defined between the second and the third bus bars.
Specification