Skin treatment device

• US 7,494,492 B2
• Filed: 08/30/2005
• Issued: 02/24/2009
• Est. Priority Date: 12/10/2004
• Status: Active Grant

• Current Assignee: Koninklijke Philips N.V.
• Original Assignee: Therative Incorporated
• Inventors: Choi, George, Da Silva, Luiz B.
• Primary Examiner(s): GIBSON, ROY DEAN
• Application Number:
  US11/216,595
• Publication Number:
  US 20060129214A1
• Time in Patent Office: 1,274 Days
• Field of Search: 606/9, 606/13, 606/20, 606 27- 31, 606 41- 51, 607/88, 607 96-102, 607/108
• US Class Current: 606/99
• CPC Class Codes: A61B 18/082 Probes or electrodes therefor
• CPC Class Codes: A61B 2017/00734 battery operated
• CPC Class Codes: A61B 2017/00761 Removing layer of skin tissue, e.g. wrinkles, scars or cancerous tissue

Abstract

A compact hand held device is provided that can be safely used by those suffering from acne, blemished skin or fine wrinkles. The hand held device includes an on/off switch and a button that pulses the device when it is placed on the target site. A battery within the device powers a circuit board and drives a short pulse of current through a heating element, which heats up to approximately 300° C. in less than 0.1 sec. Thermal conduction transfers the heat to the skin and causes a biological response that accelerates acne clearing, treats blemished skin or fine wrinkles. The total heat transferred is low enough to prevent burns. Application of acne treatment creams and gels further accelerates treatment

Claims

1. An apparatus comprising:

a housing;

a heating element attached to said housing, wherein said heating element comprises a backing layer to add strength and to conduct heat;

means for heating said heating element to a peak temperature for a time duration of less than 1 second; and

means for controlling said peak temperature over said time duration such that said peak temperature over said time duration is at least 70°

C. and will not burn human skin.

2. An apparatus comprising:

a housing;

a heating element attached to said housing, wherein said heating element includes an electrically insulating protective layer for placement directly onto skin, wherein said heating element has a surface area of about 1 cm²;

means for heating said heating element to a peak temperature for a time duration of less than 1 second; and

means for controlling said peak temperature over said time duration such that said peak temperature over said time duration is at least 70°

C. and will not burn human skin.

3. An apparatus comprising:

a housing;

a heating element attached to said housing, wherein said heating element includes a high thermal conductivity electrical insulator layer for placement directly onto skin to improve temperature uniformity;

means for heating said heating element to a peak temperature for a time duration of less than 1 second; and

means for controlling said peak temperature over said time duration such that said peak temperature over said time duration is at least 70°

C. and will not burn human skin.

4. An apparatus comprising:

a housing;

a heating element attached to said housing, wherein said heating element comprises a resistive heater;

means for heating said heating element to a peak temperature for a time duration of less than 1 second; and

means for controlling said peak temperature over said time duration such that said peak temperature over said time duration is at least 70°

C. and will not burn human skin, wherein said means for controlling said peak temperature over said time duration comprises a control circuit and a temperature sensor, and wherein said control circuit monitors said temperature sensor and prevents said heating element from heating to a temperature that would burn human skin for a given duration of time.

5. An apparatus comprising:

a housing;

a heating element attached to said housing;

means for heating said heating element to a peak temperature for a time duration of less than 1 second, wherein said means for heating said heating element comprises an electrical circuit configured to charge a capacitor that stores enough energy to heat said heating element; and

means for controlling said peak temperature over said time duration such that said peak temperature over said time duration is at least 70°

C. and will not burn human skin;

a temperature sensor that comprises a thermocouple, wherein the temperature sensor is used by the controlling means to control the peak temperature of the heating element.

6. An apparatus comprising:

a housing;

a battery powered light emitting diode fixedly attached to said housing to provide illumination;

a heating element attached to said housing;

means for heating said heating element to a peak temperature for a time duration of less than 1 second; and

means for controlling said peak temperature over said time duration such that said peak temperature over said time duration is at least 70°

C. and will not burn human skin.

7. An apparatus comprising:

a housing;

a heating element attached to said housing, wherein said heating element comprises a resistive heater;

means for heating said heating element to a peak temperature for a time duration of less than 1 second;

means for controlling said peak temperature over said time duration such that said peak temperature over said time duration is at least 70°

C. and will not burn human skin; and

means for preventing said heating element from being heated again until said heating element has cooled to at least 50°

C.

8. A method for treating skin, comprising:

providing a treatment device that includes a housing;

a heating element attached to said housing;

means for heating said heating element to a peak temperature for a time duration of less than 1 second; and

means for controlling said peak temperature over said time duration such that said peak temperature over said time duration is at least 70°

C. and will not burn human skin;

placing said heating element onto the surface of skin; and

simultaneously heating said heating element and operating said means for controlling said peak temperature over said time duration such that said peak temperature over said time duration is at least 70°

C. and does not burn human skin.

9. The method of claim 8, wherein said peak temperature over said time duration is within a range from about 100°

C.-400°

C.

10. The method of claim 8, wherein said peak temperature over said time duration is about 300°

C. and wherein said time duration is less than 0.1 sec.

11. The method of claim 8, wherein said means for controlling said peak temperature over said time duration comprises a control circuit and a temperature sensor, wherein said control circuit monitors said temperature sensor and prevents said heating element from heating to a temperature that would burn human skin for a given duration of time.

12. The method of claim 8, wherein said means for controlling said peak temperature over said time duration limits the total heat transferred to the skin to less than 50 J/cm².

13. The method of claim 8, wherein said means for controlling said peak temperature over said time duration limits the total heat transferred to the skin to less than 5 J/cm².

14. The method of claim 8, further comprising cooling said heating element.

15. The method of claim 8, further comprising applying a topical substance to the surface of said skin during a time selected from the group consisting of before the step of placing said heating element onto the surface of skin, during the step of placing said heating element onto the surface of skin, and after the step of placing said heating element onto the surface of skin.

16. The method of claim 8, wherein said method is used for treating a skin condition selected from the group consisting of acne, a wart and a skin wrinkle.

17. An apparatus comprising:

a housing;

a heating element attached to said housing, wherein said heating element includes a electrical insulating protective layer for placement directly onto skin;

means for heating said heating element to a peak temperature for a time duration of less than 1 second, wherein said means for heating said heating element comprises an electrical circuit configured to charge a capacitor that stores enough energy to heat said heating element; and

means for controlling said peak temperature over said time duration such that said peak temperature over said time duration is at least 70°

C. and will not burn human skin.