Electronic device as well as a base part and an electronic element suitable for use in such an electronic device

• US 20120154086A1
• Filed: 09/01/2010
• Published: 06/21/2012
• Est. Priority Date: 09/09/2009
• Status: Active Grant

• Current Assignee: Signify Holding B.V. (Signify N.V.)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Willemsen, Oscar Hendrikus, Waffenschmidt, Eberhard, Brember, Petrus Johannes
• Granted Patent: US 8,633,792 B2
• Time in Patent Office: Days
• US Class Current: 335/299
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H01F 7/0252 PM holding devices H01F7/021, H01F7/0215, H01F7/0226 take precedence
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/40 using two or more transmitting or receiving devices H02J50/50 takes precedence
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields

Abstract

An electronic device (1) is provided with at least a base part (2, 22, 32, 42) and an electronic module (3). The base part (2, 22, 32, 42) comprises a soft magnetic layer (5, 25, 35, 45) and at least a primary coil (7). The electronic module (3) comprises at least one electronic element and at least a secondary coil (8) adapted to inductively interact with the primary coil (7). The primary coil (7) is located in a hole (6) of the soft magnetic layer (5, 25, 35, 45). The electronic module (3) further comprises at least one magnet (9) adapted to magnetically interact with the soft magnetic layer (5, 25, 35, 45).

Claims

1. An electronic device comprising

a base part, comprising a soft magnetic layer defining a hole and at least a primary coil, and

an electronic module, comprising at least one electronic element, and at least a secondary coil, adapted to inductively interact with the primary coil, wherein the primary coil is located in the hole of the soft magnetic layer, and wherein the electronic module further comprises at least one magnet, adapted to magnetically interact with the soft magnetic layer.

2. An electronic device, according to claim 1, wherein the primary coil and the hole are substantially round, wherein the diameter of the hole is at least 10% larger than the diameter of the primary coil.

3. An electronic device, according to claim 1, wherein the hole in the soft magnetic layer is a through hole.

4. An electronic device, according to claim 1, wherein the hole in the soft magnetic layer is a blind hole.

5. An electronic device, according to claim 1, wherein the soft magnetic layer comprises at least one slit extending from the hole.

6. An electronic device, according to claim 1, wherein the soft magnetic layer comprises a number of slits extending radially from the hole.

7. An electronic device, according to claim 1, wherein the soft magnetic layer is provided with a number of primary coils, located in holes wherein at least one slit extends between adjacent holes.

8. An electronic device, according to claim 1, wherein the dimensions of the primary coil and the secondary coil are about the same.

9. An electronic device, according to claim 1, wherein the electronic module comprises at least one permanent magnet.

10. An electronic device, according to claim 9, wherein the electronic module comprises at least three permanent magnets located around the secondary coil at a regular spacing.

11. An electronic device, according to claim 9, wherein three permanent magnets are located in a triangle around the secondary coil.

12. An electronic device, according to claim 9, wherein four permanent magnets are located in a square around the secondary coil.

13. An electronic device, according to claim 9, wherein the permanent magnet, is magnetized normal to the soft magnetic layer.

14-15. -15. (canceled)