Lighting laminated glazing with a capacitive touch sensitive device and a light emitting diode and the manufacturing

Patent metadata

Field	Value
Publication number	US-10949004-B2
Application number	US-201716311931-A
Country	US
Kind code	B2
Filing date	Jun 29, 2017
Priority date	Jun 29, 2016
Publication date	Mar 16, 2021
Grant date	Mar 16, 2021

Abstract

A lighting laminated glazing includes a first transparent glazing and a second glazing; an intermediate thermoplastic material layer; an electrically conductive layer between the first and second glazings; a capacitive touch sensitive device including a touch sensitive structure formed in the electrically conductive coating, having a ground electrode and a touch electrode having a touch sensitive area; a light emitting diode on the electrically conductive layer to indicate the touch sensitive area, the diode having a light emitting surface facing the touch sensitive area, and having a first and a second terminal electrically connected to, respectively, the ground electrode and the touch sensitive area; and a lighting device controlled by the touch sensitive device, the lighting device including a lighting element distinct from the diode, the lighting element being disposed between the first and the second glazing.

First claim

The invention claimed is:

1. A lighting laminated glazing comprising:
a first transparent glazing;
a second glazing;
an intermediate layer made of thermoplastic material, laminating the second glazing to the first transparent glazing;
an electrically conductive layer disposed between the first transparent glazing and the second glazing, preferably transparent;
a capacitive touch sensitive device comprising a capacitive touch sensitive structure formed in said electrically conductive layer, the capacitive touch sensitive structure comprising a ground electrode and a touch electrode having a touch sensitive area wherein the touch electrode is surrounded by the ground electrode, the touch electrode and the ground electrode being electrically insulated from one another by a dividing line;
a light emitting indicator diode, arranged on the electrically conductive layer to indicate the touch sensitive area, the light emitting indicator diode having a light emitting surface facing at least partially the touch sensitive area, the light emitting indicator diode having a first terminal being a first electrode zone electrically connected to the ground electrode and a second terminal being a second electrode zone electrically connected to the touch sensitive area and said first electrode zone disposed within the touch sensitive area and the light emitting indicator diode being within the touch sensitive area;
a lighting device controlled by the capacitive touch sensitive device, the lighting device comprising a lighting element distinct from the light emitting indicator diode, the lighting element being disposed between the first transparent glazing and the second glazing.

2. The lighting laminated glazing according to claim 1 , wherein the dividing line is patterned so that the ground electrode comprises a ground path protruding into the touch sensitive area, the ground path being delineated by a first part of the dividing line, the light emitting indicator diode being arranged over the first part of the dividing line, the first terminal of the light emitting indicator diode being electrically connected to the ground path.

3. The lighting laminated glazing according to claim 2 , wherein the touch sensitive area has a width, the ground path having a length less than or equal to the width of the touch sensitive area.

4. The lighting laminated glazing according to claim 3 , wherein the touch area has a shape symmetrical with respect to a centre point.

5. The lighting laminated glazing according to claim 1 , configured to form a vehicle roof, the lighting device being configured to illuminate an inside of a vehicle, the first transparent glazing being an interior glazing, the second glazing being an exterior glazing.

6. The lighting laminated glazing according to claim 5 , wherein the first transparent glazing has a first main surface and a second main surface opposed to the first main surface, the second main surface being intended to be oriented towards the inside of the vehicle, the electrically conductive layer being disposed closest to the first main surface of the first transparent glazing.

7. The lighting laminated glazing according to claim 1 , wherein the capacitive touch sensitive structure is formed in a first portion of the electrically conductive layer, the lighting device comprising:
an electrically conductive structure, the electrically conductive structure comprising a negative electrode and a positive electrode;
a plurality of light emitting diodes, arranged on the electrically conductive structure, each light emitting diode having a first terminal being an anode zone electrically connected to the negative electrode and a second terminal being a cathode zone electrically connected to the positive electrode.

8. The lighting laminated glazing according to claim 7 , wherein the positive electrode is surrounded by the negative electrode, the positive electrode and the negative electrode being electrically insulated from one another by a dividing line, each light emitting diode of the lighting device being arranged over the dividing line.

9. The lighting laminated glazing according to claim 8 , wherein the touch electrode is surrounded by the ground electrode, the ground electrode being surrounded by the positive electrode, the positive electrode being surrounded by the negative electrode.

10. The lighting laminated glazing according to claim 1 , wherein the light emitting indicator diode is a inorganic light emitting diode comprising a emitting semiconductor chip or a multicolour inorganic light emitting diode comprising a plurality of light emitting semiconductor chips, each of the light emitting semiconductor chips having said first and second terminals, the touch sensitive structure comprising a plurality of ground paths electrically insulated from one another by dividing lines, each said second terminal being electrically connected to one of the ground paths.

11. The lighting laminated glazing according to claim 1 , wherein the light emitting indicator diode comprises an organic light emitting diode.

12. The lighting laminated glazing according to claim 1 , wherein the electrically conductive layer is applied on a carrier, which is disposed between the first transparent glazing and the second glazing, said carrier notably is local or and extending over a surface of the first transparent glazing.

13. The lighting laminated glazing according to claim 12 , wherein the carrier is a transparent polymer foil.

14. The lighting laminated glazing according to claim 1 , wherein the electrically conductive layer is transparent and extends over the first transparent glazing, the electrically conductive layer being in contact with a first main surface of the first transparent glazing or in a transparent carrier.

15. The lighting laminated glazing according to claim 14 , wherein the electrically conductive layer is a heating element, a solar control layer, or a low e layer.

16. The lighting laminated glazing according to claim 1 , wherein the lighting device comprises a plurality of light emitting diodes, the light emitting diodes being disposed around the light emitting indicator diode or orthogonal projections of the light emitting diodes on the conductive layer being situated around the light emitting indicator diode.

17. The lighting laminated glazing according to claim 1 , wherein the capacitive touch sensitive device comprises a sensor electronics assembly configured to control the touch sensitive structure, and a voltage source configured to supply power voltage to the light emitting indicator diode through the touch sensitive structure, the sensor electronics assembly and/or the voltage source being disposed outside the first transparent glazing.

18. The lighting laminated glazing according to claim 17 , wherein the voltage source is decoupled from the sensor electronics assembly.

19. The lighting laminated glazing according to claim 17 , wherein the voltage source is a DC voltage source.

20. The lighting laminated glazing according to claim 1 , wherein the capacitive touch sensitive device comprises a controller configured to control an operation of the light emitting indicator diode and a voltage source.

21. A method for manufacturing the lighting laminated glazing according to claim 1 , the lighting laminated glazing comprising:
the first transparent glazing;
the second glazing;
the intermediate layer made of thermoplastic material laminating the first transparent glazing to the second glazing;
the

Assignees

• Saint Gobain

Inventors

• Weber Patrick
• Droste Stefan
• Bauerle Pascal

Classifications

• H10H20/857

  Interconnections, e.g. lead-frames, bond wires or solder balls · CPC title

• H10H20/83

  Electrodes · CPC title

• H03K2217/960755

  Constructional details of capacitive touch and proximity switches · CPC title

• H03K2217/960785

  with illumination · CPC title

• H03K17/962

  Capacitive touch switches · CPC title