Curing light device

• US 9,066,777 B2
• Filed: 04/01/2010
• Issued: 06/30/2015
• Est. Priority Date: 04/02/2009
• Status: Active Grant

• Current Assignee: Kerr Corporation (Envista Holdings Corporation)
• Original Assignee: Kerr Corporation (Envista Holdings Corporation)
• Inventors: Gill, Owen
• Primary Examiner(s): Hines, Anne
• Assistant Examiner(s): DIAZ, JOSE
• Application Number:
  US12/752,335
• Publication Number:
  US 20100254149A1
• Time in Patent Office: 1,916 Days
• Field of Search: 362362-375, 433/29, 606/3, 607/88, 607/90, 607/92, 607/94, 250/365, 250/363.01, 250/504.R, 250/504.H
• US Class Current: 1/1
• CPC Class Codes: A61C 19/004 Hand-held apparatus, e.g. guns
• CPC Class Codes: F21L 4/02 characterised by the provision of two or more light sources
• CPC Class Codes: F21L 4/08 characterised by means for in situ recharging of the batteries or cells
• CPC Class Codes: F21V 19/02 with provision for adjustment, e.g. for focusing
• CPC Class Codes: F21V 23/02 the elements being transformers, impedances or power supply units, e.g. a transformer with a rectifier
• CPC Class Codes: F21V 23/06 the elements being coupling devices , e.g. connectors
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• CPC Class Codes: F21V 33/0068 Medical equipment
• CPC Class Codes: F21V 5/048 the lens being a simple lens adapted to cooperate with a point-like source for emitting mainly in one direction and having an axis coincident with the main light transmission direction, e.g. convergent or divergent lenses, plano-concave or plano-convex lenses
• CPC Class Codes: F21W 2131/202 for dentistry
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A light device includes a housing and a tip structure configured to be removably coupled with the housing. The tip structure includes a light emitting device that is operable for emitting light positioned at a distal end of the tip structure and a body for housing the light emitting device. The housing is formed of an autoclavable material capable of withstanding autoclaving. A power supply circuit is positioned in the housing and coupled to the light emitting device to power the device when the tip structure is coupled with the housing. The power supply circuit is rechargeable and includes at least one ultracapacitor element for being charged and the power supply circuit configured to discharge the ultracapacitor as a current source to drive the at least one light emitting device.

Claims

1. A light device comprising:

a housing;

at least one light emitting device operable for emitting light in a wavelength range suitable for curing a light curable compound;

a tip structure configured to be removably coupled with the housing, the at least one light-emitting device positioned at a distal end of the tip structure, the tip structure including a heat sink element coupled with the at least one light emitting device for removal of heat generated by the light emitting device, an end of the heat sink element extending past the proximal end of the tip structure;

a heat sink element in the housing, the heat sink element of the tip structure thermally coupling with the heat sink element in the housing when the tip structure is removably coupled with the housing;

the housing including a channel to receive the end of the heat sink element that extends past the tip structure proximal end for removably coupling the tip structure and the housing;

a power supply circuit positioned in the housing and operably coupled to the at least one light emitting device to power the device through the tip, the power supply circuit being rechargeable and including at least one ultracapacitor element for being charged, the power supply circuit including a current source circuit coupled between the ultracapacitor element and the light-emitting device that is configured to discharge the at least one ultracapacitor element as a current source to drive the at least one light emitting device;

a charger circuit for charging the at least one ultracapacitor element as a current source, the charger circuit configured to charge the ultracapacitor element in a generally non-exponential, linear charge function for rapid charging of the at least one ultracapacitor element.

2. The light device of claim 1 wherein the current source circuit includes at least one of a buck converter circuit, a boost converter circuit, a buck-boost converter circuit, a flyback circuit and a single ended primary inductor converter (SEPIC) circuit.

3. The light device of claim 1 wherein the power supply circuit is configured to discharge the ultracapacitor in a linear discharge function.

4. The light device of claim 1 wherein the power supply circuit includes a plurality of ultracapacitors.

5. The light device of claim 1 further comprising:

electrically conductive elements and contact elements positioned on either of the housing and a proximal end of the tip structure for electrically coupling the at least one light emitting device and power supply circuit.

6. The light device of claim 5 wherein the electrically conductive elements are circular and the contact elements can engage the electrically conductive elements over a range of 0°

to 360°

so the tip structure may be rotated with respect to the housing.

7. The light device of claim 1 wherein the tip structure includes a body for housing the light emitting device, the body being formed of an autoclavable material capable of withstanding autoclaving.

8. The light device of claim 7 wherein the tip structure body is formed of a material including at least one of a metal material, a ceramic material, a glass material or a porcelain material.

9. The light device of claim 7 wherein the tip structure body is formed to include a coating of autoclavable material.

10. The light device of claim 7 wherein the tip structure body is sealed at the distal end with a transparent element configured to allow light from the light emitting device to pass out of the housing.

11. The light device of claim 10 wherein the transparent element includes at least one of a glass window or a lens.

12. The light device of claim 1 wherein the heat sink element in the housing includes a phase change material that changes phase upon absorption of heat.

13. The light device of claim 1 wherein the tip structure includes insulation material surrounding the heat sink element.

14. The light device of claim 1 wherein the tip structure includes high temperature flex circuits for delivering power to the light emitting device.

15. A light device comprising:

a housing;

a tip structure configured to be removably coupled with the housing;

the tip structure including at least one light emitting device that is operable for emitting light and is positioned at a distal end of the tip structure;

the tip structure including a heat sink element coupled with the at least one light emitting device for removal of heat generated by the light emitting device, an end of the heat sink element extending past the proximal end of the tip structure;

a heat sink element in the housing, the heat sink element of the tip structure thermally coupling with the heat sink element in the housing when the tip structure is removably coupled with the housing;

a power supply circuit positioned in the housing for providing power to the at least one light emitting device, the power supply circuit being rechargeable and including at least one ultracapacitor element for being charged.

16. The light device of claim 15 wherein the power supply circuit includes a current source circuit coupled between the ultracapacitor element and the at least one light-emitting device that is configured to discharge the at least one ultracapacitor element as a current source to drive the at least one light emitting device.

17. The light device of claim 16 wherein the current source circuit includes at least one of a buck converter circuit, a boost converter circuit, a buck-boost converter circuit, a flyback circuit and a single ended primary inductor converter (SEPIC) circuit.

18. The light device of claim 15 wherein the power supply circuit is configured to discharge the ultracapacitor in a linear discharge function.

19. The light device of claim 15 wherein the tip structure includes a body for housing the light emitting device, the body being formed of an autoclavable material capable of withstanding autoclaving.

20. The light device of claim 19 wherein the tip structure body is formed of a material including at least one of a metal material, a ceramic material, a glass material or a porcelain material.

21. The light device of claim 19 wherein the tip structure body is sealed at the distal end with a transparent element configured to allow light from the light emitting device to pass out of the housing.

22. The light device of claim 21 wherein the transparent element includes at least one of a glass window or a lens.

23. The light device of claim 15 wherein the housing includes a channel to receive the end of the heat sink element extending past the proximal end of the tip structure.

24. The light device of claim 15 further comprising circular electrically conductive elements positioned on one of the housing and a proximal end of the tip structure and contact elements positioned on the other of the housing and proximal end of the top structure for electrically coupling the at least one light emitting device and power supply circuit, the contact elements engaging the electrically conductive elements over a range of 0°

to 360°

so the tip structure may be rotated with respect to the housing.