# US 2021/0242674 A1 · Long busbars having segments for increased robustness

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- Number: US 2021/0242674 A1
- Document ID: US20210242674A1
- Status: Published application
- Kind: A1
- Application number: 17/049,844
- Filed: 2019-03-29
- Published: 2021-08-05
- Earliest claimed: 2018-04-23
- Assignees: Saint-Gobain Glass France
- Applicants: Saint-Gobain Glass France
- Inventors: Florian MANZ; Michael LABROT; Jefferson DO ROSARIO; Andreas SZNERSKI; Sebastian SCHURSE
- Web page: https://patentgrep.com/patent/US20210242674A1

## CPC

- H02G 5/02: Open installations
- B32B 17/10036: {comprising two outer glass sheets}
- B32B 17/10211: {Doped dielectric layer, electrically conductive, e.g. SnO2:F}
- B32B 17/10376: {Laminated safety glass or glazing containing metal wires}
- B32B 17/10504: {Liquid crystal layer}
- B32B 17/10761: {containing vinyl acetal}
- B32B 17/1077: {containing polyurethane}
- B32B 17/10788: {containing ethylene vinylacetate}
- B60R 16/02: electric {constitutive elements}
- G02F 1/1334: based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
- H01B 5/14: comprising conductive layers or films on insulating-supports
- B32B 2307/102: Insulating
- B32B 2605/00: Vehicles
- G02F 1/13452: {Conductors connecting driver circuitry and terminals of panels}
- H02G: INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K})

## Abstract

A vehicle includes an outer glass pane, an outer laminated layer, an inner laminated layer, and one inner glass pane, wherein a PDLC layer stack is arranged between the outer and inner laminated layers, the PDLC layer stack formed by a) an outer polymeric carrier layer, b) an outer electrically conductive layer, c) a PDLC layer, d) an inner electrically conductive layer, and e) an inner polymeric carrier layer, wherein at a lateral section of the PDLC layer stack, the inner electrically conductive layer protrudes together with the inner polymeric carrier layer, and at another lateral section of the PDLC layer stack, the outer electrically conductive layer protrudes together with the outer polymeric carrier layer, and a busbar is arranged in each case on the protruding inner electrically conductive layer and the protruding outer electrically conductive layer.

## Claims

### Claim 1

A vehicle pane comprising, in this order, an outer glass pane, one or a plurality of outer laminated layers, one or a plurality of inner laminated layers, and an inner glass pane, wherein a PDLC layer stack is arranged between the outer laminated layer and the inner laminated layer, which PDLC layer stack is formed from, in this order,
a) an outer polymeric carrier layer,
b) an outer electrically conductive layer,
c) a PDLC layer,
d) an inner electrically conductive layer, and
e) an inner polymeric carrier layer,
wherein at a lateral section of the PDLC layer stack, the outer polymeric carrier layer, the outer electrically conductive layer, and the PDLC layer are recessed such that the inner electrically conductive layer protrudes there together with the inner polymeric carrier layer, and at another lateral section of the PDLC layer stack, the inner polymeric carrier layer, the inner electrically conductive layer, and the PDLC layer are recessed such that the outer electrically conductive layer protrudes there together with the outer polymeric carrier layer, and
a busbar is arranged in each case on the protruding inner electrically conductive layer and the protruding outer electrically conductive layer, which busbar is connected to the electrically conductive layer of the PDLC layer stack via an electrically conductive intermediate layer, wherein
the busbars are in each case formed from at least two separate electrically conductive metal strips, which are arranged one behind the other in a longitudinal direction, wherein the adjacent separate metal strips are electrically conductively connected via at least one bridge element or an overlapping arrangement.

### Claim 2 (depends on 1)

The vehicle pane according to claim 1, wherein the electrically conductive intermediate layer is a silver layer and/or the electrically conductive metal strip is a copper strip.

### Claim 3 (depends on 1)

The vehicle pane according to claim 1, wherein the electrically conductive layers of the PDLC layer stack are formed from transparent, conductive oxides.

### Claim 4 (depends on 1)

The vehicle pane according to claim 1, wherein the bridge element is made of the same material as the electrically conductive metal strip and/or is formed from copper strip.

### Claim 5 (depends on 1)

The vehicle pane according to claim 1, wherein the bridge element is U-shaped, wherein one leg of the bridge element is mounted on an electrically conductive metal strip, and the other leg of the bridge element is mounted on the adjacent, electrically conductive metal strip.

### Claim 6 (depends on 1)

The vehicle pane according to claim 1, wherein in the overlapping arrangement, an electrically conductive metal strip is not applied in its entire length on the electrically conductive intermediate layer and is overlappingly mounted on the adjacent metal strip with the part not applied to the electrically conductive intermediate layer.

### Claim 7 (depends on 1)

The vehicle pane according to claim 1, wherein in the overlapping arrangement, a length of a region in which two metal strips overlap is in the range from 5 to 100 mm.

### Claim 8 (depends on 1)

The vehicle pane according to claim 1, wherein the at least one bridge element is mounted by gluing or soldering onto the electrically conductive metal strips or in the overlapping arrangement, the part of a metal strip not applied on the intermediate layer is overlappingly mounted on the adjacent, electrically conductive metal strip by gluing or soldering.

### Claim 9 (depends on 1)

The vehicle pane according to claim 1, wherein the busbars have a length of at least 60 cm, and/or wherein a length of the electrically conductive metal strip is in the range from 25 to 80 cm, wherein only the length of the metal strip applied on the electrically conductive intermediate layer is taken into account.

### Claim 10 (depends on 1)

The vehicle pane according to claim 1, wherein a distance between two adjacent, electrically conductive metal strips is in the range from 0 to 50 mm.

### Claim 11 (depends on 1)

The vehicle pane according to claim 1, wherein the busbars are in each case formed from two, three, or four separate electrically conductive metal strips.

### Claim 12 (depends on 1)

The vehicle pane according to claim 1, wherein one busbar is arranged in a side region of one side of the vehicle pane, and the other busbar is arranged in the side region of the opposite side of the vehicle pane, wherein the two sides, in whose side regions the busbars are arranged, are longer than the other two sides of the vehicle pane.

### Claim 13 (depends on 1)

The vehicle pane according to claim 1, wherein the electrically conductive intermediate layer under the busbar is a continuous electrically conductive intermediate layer.

### Claim 14 (depends on 1)

The vehicle pane according to claim 1, wherein the vehicle pane is a motor vehicle pane.

### Claim 15 (depends on 1)

The vehicle, including a vehicle pane according to claim 1.

### Claim 16 (depends on 2)

The vehicle pane according to claim 2, wherein the copper strip is a self-adhesive copper strip.

### Claim 17 (depends on 3)

The vehicle pane according to claim 3, wherein the conductive oxides include indium tin oxide.

### Claim 18 (depends on 7)

The vehicle pane according to claim 7, wherein the length of the region in which two metal strips overlap is in the range from 10 to 30 mm.

### Claim 19 (depends on 14)

The vehicle pane according to claim 14, wherein the vehicle pane is a sliding roof pane, a glass roof, a rear window, a rear side window, or a front side window.

### Claim 20 (depends on 15)

The vehicle according to claim 15, wherein the vehicle is preferably a motor vehicle.