Glazing

Patent metadata

Field	Value
Publication number	US-2016286609-A1
Application number	US-201415034802-A
Country	US
Kind code	A1
Filing date	Nov 13, 2014
Priority date	Nov 16, 2013
Publication date	Sep 29, 2016
Grant date	—

Abstract

The invention relates to a heatable glazing comprising an electrically conductive coating and a data transmission window. The data transmission window comprises a plurality of grids made by ablations in the electrically conductive coating and at least one break line between adjacent grids. At least one of a width “a” of the grids and a distance “b” between adjacent grids is selected to maximise transmission of a predetermined frequency of electromagnetic radiation and to reduce the formation of hot spots. Preferred embodiments conform to a standard size of an ERTICO window and a frequency range from 5 GHz to 6 GHz.

First claim

1 . A heatable glazing comprising:
an electrically conductive coating a data transmission window in the electrically conductive coating wherein the data transmission window comprises: a plurality of ablations in the electrically conductive coating, arranged to provide a plurality of grids, the grids comprising segments in rows and columns; at least a break line, each break line arranged between adjacent grids; and at least one of a width “a” of the grids and a distance “b” between adjacent grids is selected to maximise transmission of a predetermined frequency of electromagnetic radiation.

2 . A heatable glazing according to claim 1 , wherein the width “a” of the grids is in the range from 4 to 10 mm.

3 . A heatable glazing according to claim 2 , wherein the width “a” of the grids is in the range from 4 to 6 mm.

4 . A heatable glazing according to claim 3 , wherein the width “a” of the grids is in the range from 5 to 6 mm.

5 . A heatable glazing according to claim 1 , wherein the distance “b” between adjacent grids is in the range from 1 to 4 mm.

6 . A heatable glazing according to claim 5 , wherein the distance “b” between adjacent grids is in the range from 2 to 4 mm.

7 . A heatable glazing according to claim 6 , wherein the distance “b” between adjacent grids is in the range from 3 to 4 mm.

8 . A heatable glazing according to claim 1 , wherein a height “c” of the grids is greater than the width “a” of the grids.

9 . A heatable glazing according to claim 8 , wherein a height “c” of the grids is in the range from 50 to 100 mm.

10 . A heatable glazing according to claim 9 , wherein the height “c” of the grids is in the range from 65 to 75 mm.

11 . A heatable glazing according to claim 1 , wherein a width “d” of the data transmission window is greater than three times the sum of the width “a” of the grids and the distance “b” between adjacent grids, i.e. “d>3(a+b)”.

12 . A heatable glazing according to claim 1 , wherein a width “d” of the data transmission window is in the range from 50 to 200 mm.

13 . A heatable glazing according to claim 12 , wherein the width “d” of the data transmission window is in the range from 130 to 140 mm.

14 . A heatable glazing according to claim 1 , wherein a width “e” of each segment of the grids is in the range from 0.5 to 5 mm.

15 . A heatable glazing according to claim 1 , wherein the heatable glazing further comprises a top busbar and a bottom busbar arranged substantially at right angles to the break lines.

16 . A heatable glazing according to claim 1 , wherein the predetermined frequency of electromagnetic radiation is in the range from 3 to 10 GHz.

17 . A heatable glazing according to claim 16 , wherein the predetermined frequency of electromagnetic radiation is in the range from 5 to 6 GHz.

18 . A heatable glazing according to claim 1 , wherein the transmission of electromagnetic radiation at the predetermined frequency through the data transmission window relative to free space is greater than or equal to −3 dB.

19 . A heatable glazing according to claim 1 , wherein a percentage conductive width b/(a+b) of the data transmission window is greater than or equal to 25%.

20 . A heatable glazing according to claim 1 , wherein the width “a” of the grids and the distance “b” between adjacent grids are selected to be integer multiples “A” and “B” of a width “e” of each segment of the grids.

21 . A heatable glazing according to claim 21 , wherein a height “c” of the grids is selected to be an integer multiple “C” of the width “e” of each segment of the grids.

22 . A heatable glazing according to claim 1 , wherein the heatable glazing comprises first and second plies of interlayer material, between first and second plies of glazing material and wherein the electrically conductive coating is on a carrier film, between the first and second plies of interlayer material.

23 . A heatable glazing according to claim 1 , wherein the heatable glazing comprises a ply of interlayer material, between first and second plies of glazing material and wherein the electrically conductive coating is on a surface of the first ply or the second ply of glazing material, and is in contact with the ply of interlayer material.

Assignees

• Pilkington Group Ltd

Inventors

• Paulus Peter
• Oka Hidetoshi
• Chamberlain Mark Andrew
• Tokuda Tatsumi

Classifications

• B32B17/10192 Primary

  patterned in the form of columns or grids · CPC title

• H05B2203/008

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

• H01Q1/1278

  in association with heating wires or layers · CPC title

• B32B2605/006

  Transparent parts other than made from inorganic glass, e.g. polycarbonate glazings · CPC title

• B32B17/10036

  comprising two outer glass sheets · CPC title