Transparent panel having heatable coating and production method therefor

Patent metadata

Field	Value
Publication number	US-9302451-B2
Application number	US-201113695929-A
Country	US
Kind code	B2
Filing date	May 10, 2011
Priority date	May 10, 2010
Publication date	Apr 5, 2016
Grant date	Apr 5, 2016

Abstract

The invention relates to a transparent pane with a transparent heatable coating, which extends at least over a part of the pane surface, in particular over its visual field. The heatable coating is divided by at least one heatable coating-free zone into at least one first heatable coating zone and a second heatable coating zone, wherein the two heatable coating zones are in each case electrically connected to at least two collecting conductors such that after application of a supply voltage that is provided by a voltage source, in each case a current flows over at least one first heating field formed by the first heatable coating zone and at least one second heating field formed by the second heatable coating zone. At least one heating element is disposed in the heatable coating-free zone, which heating element has an ohmic resistance such that by means of application of the supply voltage to the heating element, the pane is heatable in a surface area containing the heatable coating-free zone. The at least one heating element is configured such that by means of application of the supply voltage to the heating element, the pane is also heatable in at least one surface area adjacent the coating-free zone which surface area contains at least one of the collecting conductors.

First claim

The invention claimed is:

1. A transparent pane, comprising:
an electrically heatable, transparent coating, which extends over a part of a pane surface, wherein the heatable coating is divided by a coating-free zone into a first coating zone and a second coating zone, wherein the first and second coating zones are in each case electrically connected to at least two collecting conductors such that after application of a supply voltage from a voltage source, a current flows over a first heating field formed by the first coating zone and a second heating field formed by the second coating zone,
wherein a heating element is disposed in the coating-free zone that has an ohmic resistance such that application of the supply voltage to the heating element heats the pane in a surface area comprising the coating-free zone,
wherein the heating element is configured such that application of the supply voltage to the heating element heats the pane in a second surface area adjacent to the coating-free zone, which second surface area comprises at least one of the collecting conductors, and
wherein the specific heating output of the at least one heating element is greater than the specific heating output of the heating field to whose coating zone the collecting conductor contained in the surface area is electrically connected.

2. The transparent pane of claim 1 , wherein the heating element is electrically connected to the at least two collecting conductors, which are provided for an electrical connection to different poles of the voltage source.

3. The transparent pane of claim 1 , wherein a collecting conductor of the first coating zone and a collecting conductor of the second coating zone, which are provided for a connection to one and the same pole of the voltage source, are electrically connected to each other.

4. The transparent pane of claim 3 , wherein a first collecting conductor provided for connection to one pole comprises a first collecting conductor section connected to the first coating zone and a second collecting conductor section connected to the second coating zone,
wherein the second collecting conductor section extends from the first collecting conductor section at least at an angle to the first collecting conductor section, and
wherein a second collecting conductor provided for connection to the other pole comprises a third collecting conductor section connected to the first coating zone and a fourth collecting conductor section connected to the second coating zone, which extends to the first collecting conductor section without being electrically connected thereto.

5. The transparent pane of claim 4 , wherein the coating-free zone is divided by the second collecting conductor section into two at least approximately same sized zone parts, wherein the second collecting conductor section is disposed between two fourth collecting conductor sections.

6. The transparent pane of claim 5 , wherein the heating element is disposed in each zone part.

7. The transparent pane of claim 4 , wherein the heating element is configured such that application of the supply voltage heats the surface area of the pane comprising the first collecting conductor section.

8. The transparent pane of claim 1 , wherein the heating element is made from one and the same material as the collecting conductor.

9. The transparent pane of claim 1 , wherein the heating element is produced from a metallic printing paste.

10. The transparent pane of claim 1 , in the form of a composite pane.

11. The transparent pane of claim 1 , in the form of a vehicle windshield,
wherein the heating element is disposed in a region of a resting or parked position of a windshield wiper that wipes the pane.

12. A method for producing a transparent pane, the method comprising:
(I) producing a pane comprising an electrically heatable, transparent coating;
(II) forming a coating-free zone in the coating, wherein the coating-free zone divides the heatable coating into a first coating zone and a second coating zone;
(III) producing at least two collecting conductors, which are electrically connected to the first and second coating zones such that after application of a supply voltage, in each case a current flows over a first heating field formed by the first coating zone and a second heating field formed by the second coating zone,
(IV) producing a heating element in the coating-free zone, which heats a surface area of the pane comprising the coating-free zone, wherein the heating element is configured such that application of the supply voltage to the heating element heats the pane in a second surface area adjacent to the coating-free zone, wherein the second surface area comprises at least one of the collecting conductors,
wherein the specific heating output of the at least one heating element is greater than the specific heating output of the heating field to whose coating zone the collecting conductor contained in the surface area is electrically connected.

13. The method of claim 12 , wherein the coating-free zone is stripped by mechanical ablation.

14. The method of claim 12 , wherein the heating element is made from the same material as the collecting conductors and formed together therewith.

15. The method of claim 14 , wherein the heating element and the collecting conductors are produced by printing.

Assignees

• Lisinski Susanne
• Schall Guenther
• Phan Dang Cuong
• Reul Bernhard
• Vortmeier Gunther
• Saint Gobain

Inventors

• Lisinski Susanne
• Schall Guenther
• Phan Dang Cuong
• Reul Bernhard
• Vortmeier Gunther

Classifications

• H05B2203/031

  Heaters specially adapted for heating the windscreen wiper area · CPC title

• H05B2203/008

  with layout including a portion free of resistive material, e.g. communication window · CPC title

• H05B2203/002

  Heaters using a particular layout for the resistive material or resistive elements · CPC title

• B60S1/048

  with a heating device for the wiper parking position · CPC title

• B32B17/10036

  comprising two outer glass sheets · CPC title