Solid state light illuminator

• US 7,784,965 B2
• Filed: 07/07/2008
• Issued: 08/31/2010
• Est. Priority Date: 12/25/2007
• Status: Expired due to Fees

• Current Assignee: Foxsemicon Integrated Technology Incorporated
• Original Assignee: Foxsemicon Integrated Technology Incorporated
• Inventors: Jiang, Wen-Jang, Hsu, Hung-Kuang
• Primary Examiner(s): TSO, LAURA K
• Application Number:
  US12/168,780
• Publication Number:
  US 20090161362A1
• Time in Patent Office: 785 Days
• Field of Search: 362/192, 362/640, 362/245, 362/158, 362/189
• US Class Current: 362/192
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H05B 45/382 with galvanic isolation between input and output

Abstract

A solid state light illuminator includes a solid state lighting element, a primary coil, and a secondary coil. The secondary coil and the solid state lighting element cooperatively form a circuit. The secondary coil couples electromagnetically with the primary coil. The primary coil is adapted for electrically connecting to an AC power source to generate an alternating magnetic field. The alternating magnetic field generates an induced electromotive force in the secondary coil to apply an electrical current to the solid state lighting element.

Claims

1. A solid state light illuminator, comprising:

a primary coil configured to electrically connect to an alternating current power source to generate an alternating magnetic field;

a secondary coil coupling electromagnetically with the primary coil;

a solid state lighting element electrically connected to the secondary coil, wherein the alternating magnetic field generated by the primary coil, generates an induced electromotive force in the secondary coil to apply an electrical current to the solid state lighting element; and

a first iron core and a second iron core, wherein the primary coil is wound around the first iron core and the secondary coil is wound around the second iron core;

wherein the first iron core and the second iron core are in electrically non-contacting state, and a distance between the first iron core and the second iron core is in a range of 0.1-0.3 mm.

2. The solid state light illuminator of claim 1, further comprising an alternating current-direct current conversion circuit that electrically connects the solid state lighting element and the secondary coil.

3. The solid state light illuminator of claim 1, further comprising an oscillating circuit that electrically connects the alternating current power source and the primary coil.

4. The solid state light illuminator of claim 3, further comprising a switching circuit that electrically connects the alternating current power source and the oscillating circuit.

5. The solid state light illuminator of claim 1, further comprising a primary shell and a secondary shell each made of waterproof and insulating material, wherein the primary coil is sealed in the primary shell, and the secondary coil and solid state lighting element are sealed in the secondary shell.

6. The solid state light illuminator of claim 5, further comprising a lens, wherein the solid state light illuminator is arranged underwater;

the secondary shell defining an opening at one end;

the lens positioned at the opening thereby forming a seal at the opening;

the solid state lighting element received in the secondary shell and facing the lens.

7. The solid state light illuminator of claim 1, wherein the solid state lighting element comprises at least one light emitting diode.

8. A solid state light illuminator, comprising:

a first iron core;

a primary coil wound around the first iron core and configured to electrically connect to an alternating current power source to generate an alternating magnetic field;

a solid state lighting element;

a second iron core;

a secondary coil wound around the second iron core and coupled electromagnetically with the primary coil, wherein the alternating magnetic field generated by the primary coil generates an induced electromotive force in the secondary coil to apply an electrical current to the solid state lighting element causing the solid state lighting element to emit light; and

an alternating current-direct current conversion circuit electrically connecting the solid state lighting element and the secondary coil to form a circuit;

wherein the first iron core and the second iron core are in electrically non-contacting state, and a distance between the first iron core and the second iron core is in a range of 0.1-0.3 mm.

9. The solid state light illuminator of claim 8, further comprising an oscillating circuit that electrically connects the alternating current power source and the primary coil.

10. The solid state light illuminator of claim 9, further comprising a switching circuit that electrically connects the alternating current power source and the oscillating circuit.

11. The solid state light illuminator of claim 8, further comprising a primary shell and a secondary shell each made of waterproof and insulating material, wherein the primary coil is sealed in the primary shell, and the secondary coil and solid state lighting element are sealed in the secondary shell.

12. The solid state light illuminator of claim 11, further comprising a lens, wherein the solid state light illuminator is arranged underwater;

the secondary shell defining an opening at one end, the lens positioned at the opening thereby forming a seal at the opening;

the solid state lighting element received in the secondary shell and facing the lens.

13. The solid state light illuminator of claim 8, wherein the solid state lighting element comprises at least one light emitting diode.

14. A solid state light illuminator, comprising:

a primary coil configured to electrically connect to an alternating current power source to generate an alternating magnetic field;

a secondary coil coupling electromagnetically with the primary coil;

a solid state lighting element electrically connected to the secondary coil, wherein the alternating magnetic field generated by the primary coil, generates an induced electromotive force in the secondary coil to apply an electrical current to the solid state lighting element; and

a primary shell and a secondary shell each made of waterproof and insulating material, wherein the primary coil is sealed in the primary shell, and the secondary coil and solid state lighting element are sealed in the secondary shell.

15. The solid state light illuminator of claim 14 further comprising a lens, wherein the solid state light illuminator is arranged underwater;

the secondary shell defining an opening at one end;

the lens positioned at the opening thereby forming a seal at the opening;

the solid state lighting element received in the secondary shell and facing the lens.