Transparent capacitive wireless powering system

• US 9,672,977 B2
• Filed: 08/09/2012
• Issued: 06/06/2017
• Est. Priority Date: 08/16/2011
• Status: Active Grant

• Current Assignee: Signify Holding B.V. (Signify N.V.)
• Original Assignee: Philips Lighting BV (Koninklijke Philips N.V.)
• Inventors: Sempel, Adrianus, Van Goor, Dave Willem, Waffenschmidt, Eberhard, Van Den Biggelaar, Theodorus Johannes Petrus, Willemsen, Oscar Hendrikus, Van Der Zanden, Henricus Theodorus
• Primary Examiner(s): Barnie, Rexford
• Assistant Examiner(s): SHIAO, DAVID A
• Application Number:
  US14/238,287
• Publication Number:
  US 20140191587A1
• Time in Patent Office: 1,762 Days
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H02J 50/05 using capacitive coupling
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H04B 5/22 Capacitive coupling
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer
• CPC Class Codes: H05B 45/382 with galvanic isolation between input and output

Abstract

A transparent capacitive powering system (200) is disclosed. The system comprises a pair of receiver electrodes (241, 242) connected to a load (250) through an inductor (260), wherein the inductor is coupled to the load to resonate the system; and a transparent infrastructure (220) having at least a first layer (130) of a non-conductive transparent material and a second layer (120) of a conductive transparent material coupled to each other, wherein the second layer is arranged to form a pair of transmitter electrodes (221, 222), wherein the pair of receiver electrodes are decoupled from the second layer, thereby forming a capacitive impedance between the pair of transmitter electrodes and the pair of receiver electrodes, wherein a power signal generated by a driver (210) is wirelessly transferred from the pair of transmitter electrodes to the pair of receiver electrodes to power the load when a frequency of the power signal substantially matches a series-resonance frequency of the first inductor and the capacitive impedance.

Claims

1. A transparent capacitive powering system comprising:

a pair of receiver electrodes connected to a load through an inductor wherein the inductor is coupled in series with the load;

a pair of coupling plates configured to receive a power signal generated by a driver;

a transparent infrastructure having at least a first layer of a non-conductive transparent material and a second layer of a conductive transparent material coupled to each other,

wherein the second layer is arranged to form a pair of transmitter electrodes,

wherein the pair of coupling plates are decoupled from the second layer, thereby forming a first capacitive impedance between the pair of transmitter electrodes and the pair of coupling plates,

wherein the pair of receiver electrodes are decoupled from the second layer, thereby forming a second capacitive impedance between the pair of transmitter electrodes and the pair of receiver electrodes,

wherein the power signal is wirelessly transferred from the pair of coupling plates to the pair of transmitter electrodes and from the pair of transmitter electrodes to the pair of receiver electrodes to power the load when a frequency of the power signal substantially matches a series-resonance frequency of the inductor, the first capacitive impedance, and the second capacitive impedance.

2. The system of claim 1, wherein the transparent infrastructure further includes a third layer of non-conductive material coupled to the second layer.

3. The system of claim 2, wherein the transparent non-conductive material of each of the third layer and first layer is at least any one of:

glass, fiberglass, and polycarbonate.

4. The system of claim 2, wherein the transparent infrastructure is an insulated glazing.

5. The system of claim 1, wherein the transparent conductive material of the second layer is at least any one of:

an aluminum layer with thickness less than about 50 microns, indium tin oxide (ITO), and PEDOT.

6. The system of claim 1, wherein the driver is connected to the transmitter electrodes by means of any one of a capacitive coupling and a galvanic contact.

7. The system of claim 6, wherein the driver is connected to the transmitter electrodes by means of the capacitive coupling, the series-resonance frequency also includes capacitive impedance formed between the pair of transmitter electrodes and the driver.

8. The system of claim 1, wherein the load and the receiver electrodes are connected to the first layer of the transparent infrastructure by means of any one of:

electrical conductive glue material, an electrical conductive fabric material, and a mechanical device.

9. The system of claim 8, wherein the mechanical device is a vacuum cup, wherein the vacuum cap includes the receiver electrodes, wherein the receiver electrodes are in contact with the first layer of the transparent infrastructure when vacuum is maintained in the vacuum cup.

10. The system of claim 8, wherein the mechanical device includes a non-conductive structure adhered to conductive flexible material, wherein the non-conductive structure includes the receiver electrodes and the conductive flexible material is in contact with the first layer of the of the transparent infrastructure.

11. The system of claim 1, wherein the load is at least a lamp, wherein the lamp is at least one of a LED string and a LED lamp.

12. The system of claim 11, wherein the system is configured to wirelessly power the lamp placed on top of the transparent infrastructure where the lamp illuminates downwards through the transparent infrastructure.

13. The system of claim 12, wherein each receiver electrode includes a top-layer made of transparent conductive material and a bottom-layer made of transparent non-conductive material, wherein the bottom-layer is in contact with the transparent infrastructure and the top-layer is in contact with the lamp.

14. A transparent capacitive powering system, comprising:

a pair of receiver electrodes connected to a lamp through an inductor wherein the inductor is coupled in series with the lamp, each receiver electrode includes a top-layer made of transparent conductive material and a bottom-layer made of transparent non-conductive material; and

a pair of coupling plates configured to receive a power signal generated by a driver;

a transparent infrastructure having at least a first layer of a non-conductive transparent material and a second layer of a conductive transparent material coupled to each other,

wherein the second layer is arranged to form a pair of transmitter electrodes, the bottom-layers of the pair of receiver electrodes are in contact with the transparent infrastructure, the top-layers are in contact with the lamp, the pair of receiver electrodes are decoupled from the second layer, thereby forming a second capacitive impedance between the pair of transmitter electrodes and the pair of receiver electrodes,

wherein the pair of coupling plates are decoupled from the second layer, thereby forming a first capacitive impedance between the pair of transmitter electrodes and the pair of coupling plates,

wherein the power signal is wirelessly transferred from the pair of coupling plates to the pair of transmitter electrodes and from the pair of transmitter electrodes to the pair of receiver electrodes to power the lamp when a frequency of the power signal substantially matches a series-resonance frequency of the inductor, the first capacitive impedance, and the second capacitive impedance.

15. The system of claim 14, wherein the system is configured to wirelessly power the lamp placed on top of the transparent infrastructure where the lamp illuminates downwards through the transparent infrastructure.