Heated Coated Glazing

• US 20170251525A1
• Filed: 09/10/2015
• Published: 08/31/2017
• Est. Priority Date: 09/12/2014
• Status: Active Application

• Current Assignee: Pilkington Group Limited
• Original Assignee: Pilkington Group Limited
• Inventors: Chamberlain, Mark Andrew, Hazzard, Alan David
• Application Number:
  US15/509,758
• Publication Number:
  US 20170251525A1
• Time in Patent Office: Days
• CPC Class Codes: B32B 17/10005 laminated safety glass or glazing
• CPC Class Codes: B32B 17/10036 comprising two outer glass sheets
• CPC Class Codes: B32B 17/10174 Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
• CPC Class Codes: B32B 17/10348 comprising an obscuration band
• CPC Class Codes: B32B 17/10761 containing vinyl acetal
• CPC Class Codes: B32B 2367/00 Polyesters, e.g. PET, i.e. polyethylene terephthalate
• CPC Class Codes: H05B 2203/008 with layout including a portion free of resistive material, e.g. communication window
• CPC Class Codes: H05B 2203/013 Heaters using resistive films or coatings
• CPC Class Codes: H05B 3/84 Heating arrangements specially adapted for transparent or reflecting areas, e.g. for demisting or de-icing windows, mirrors or vehicle windshields

Abstract

The invention relates to glazing having a conductive coating having one or more data transmission windows for transmitting data to/from electronic devices in a vehicle, in which a deletion line surrounds the data transmission window. The deletion line defines first and second regions of the conductive coating. The first region comprises an electrically heated region and first and second busbars for supplying electrical power. The second region comprises at least one data transmission window. The second region may be electrically isolated from the second busbar so that the second region cannot be electrically heated.

Claims

1. ) A glazing, comprising:

a conductive coating suitable for electrical heating;

a deletion line defining first and second regions of the conductive coating

wherein the first region comprises;

an electrically heated region; and

first and second busbars for supplying electrical power to the electrically heated region

the second region comprising at least one data transmission window.

2. ) A glazing according to claim 1, wherein the second region is electrically isolated from the second busbar.

3. ) A glazing according to claim 1, comprising a second data transmission window.

4. ) A glazing according to claim 1, wherein the deletion line width is 100 um or less.

5. ) A glazing according to claim 1, wherein the deletion line width is 10 um or less.

6. ) A glazing according to claim 1, wherein the deletion line is a laser ablation line.

7. ) A glazing according to claim 1, wherein each data transmission window is at least 40 mm wide and at least 20 mm in height.

8. ) A glazing according to claim 1, wherein the first busbar extends substantially parallel with and adjacent to a portion of an upper edge of the glazing.

9. ) A glazing according to claim 1, further comprising an auxiliary busbar separated from the first busbar by the deletion line.

10. ) A glazing according to claim 1, wherein the first busbar and the deletion line are arranged to contact each other, so that a corner of the electrically heated region is formed.

11. ) A glazing according to claim 1, wherein the conductive coating has sheet resistance in the range 2 ohms per square to 20 ohms per square.

12. ) A glazing according to claim 1, further comprising a carrier film for carrying the conductive coating.

13. ) A glazing according to claim 1, further comprising first and second sheets of interlayer material, wherein the carrier film is laid over the first sheet of interlayer material and wherein the second sheet of interlayer material is laid over the carrier film.

14. ) An automotive vehicle having a glazing according to claim 1, wherein the interior of the vehicle is provided with at least one transmitter or receiver arranged to transmit or receive an electromagnetic data signal through at least one of the data transmission windows.

15. ) A process for manufacture of a glazing comprising:

providing a conductive coating suitable for electrical heating;

ablating a deletion line by a laser, so as to define first and second regions of the conductive coating;

providing in the first region an electrically heated region by laying down first and second busbars for supplying electrical power to the electrically heated region; and

providing in the second region at least one data transmission window.