Skin monitoring device, method of monitoring the skin, monitoring device, method of irradiating the skin, and use of an OLED

Patent metadata

Field	Value
Publication number	US-9854975-B2
Application number	US-30413707-A
Country	US
Kind code	B2
Filing date	Jun 11, 2007
Priority date	Jun 12, 2006
Publication date	Jan 2, 2018
Grant date	Jan 2, 2018

Abstract

Skin monitoring device for application near the skin includes a processing circuit and at least one photosensor configured to detect at least one approximate wavelength of light reflected and/or emitted by the skin. A signal receiving circuit receives signals from the photosensor.

First claim

The invention claimed is:

1. A skin monitoring device for application near a skin, comprising:
a plurality of light units each having an emitting mode for emitting light towards the skin and a detecting mode for detecting at least one approximate wavelength of light reflected by the skin;
a signal receiving circuit configured to receive a first signal from a first light unit of the plurality of light units and a second signal from a second light unit of the plurality of light units operating in the detecting mode, and to determine an amount of current excited by the light received by the first light unit and the second light unit; and
a processing circuit configured to convert the determined amount of the current into skin data by comparing the determined amount of the current with reference current values associated with predetermined skin data, and to selectively operate the plurality of light units in the emitting mode and the detecting mode to generate a map of the skin using the skin data;
wherein the first light unit includes a first fixed lens and the second light unit includes a second fixed lens, the first fixed lens having a first fixed focal length for a pre-specified treatment of the skin at a first depth of a desired location and being configured to directly receive light emitted directly from the first unit and to focus the light emitted directly from the first unit onto the first depth, and the second fixed lens having a second fixed focal length different from the first fixed focal length for the pre-specified treatment of the skin at a second depth different from the first depth and being configured to focus light directly from the second unit onto the second depth of the desired location,
wherein the light emitted from the first unit has a frequency and the light emitted from the second unit has the same frequency and the difference in depth between the first and second depths results from the first and second fixed lenses having different fixed focal lengths;
wherein the map comprises a map of reflectivity of the skin, and the processing circuit is configured to adjust intensities of the plurality of light units based on the map and as a function of locations of the plurality of light units above the skin.

2. The skin monitoring device according to claim 1 , wherein the plurality of light units, in the emitting mode, is configured to emit light of at least two approximate wavelengths of light.

3. The skin monitoring device according to claim 1 , wherein the plurality of light units comprises a laser.

4. The skin monitoring device according to claim 1 , wherein the plurality of light units include a laser as a light source for illuminating the skin, the laser being adapted to allow a part of a laser beam, scattered by the skin, to re-enter into the laser, and a photo sensor for measuring light emitted from the laser for obtaining a signal which varies in accordance with an interference between an original laser beam and a scattered beam scattered by the skin.

5. The skin monitoring device according to claim 4 , wherein the skin monitoring device is configured to emit and/or detect light at a distance of between 0 and 2 mms from the skin.

6. The skin monitoring device according to claim 1 , wherein the plurality of light units comprises at least one of a light emitting diode and an organic light emitting diode.

7. The skin monitoring device according to claim 1 , wherein the plurality of light units comprises a light emitting diode, an organic light emitting diode, and laser sensors.

8. The skin monitoring device according to claim 1 , which is configured to conform at least partly to the shape of a human body, and is configured to be at least partly flexible.

9. The skin monitoring device according to claim 1 , further comprising at least one spacer such that the skin monitoring device emits and/or detects light at a distance from the skin of between approximately 0.1 and 50 mm.

10. The skin monitoring device according to claim 1 , further comprising a storage arrangement for storing the predetermined skin data.

11. The skin monitoring device according to claim 1 , further comprising a wireless communication arrangement for communication between the signal receiving circuit and the processing circuit.

12. The skin monitoring device according to claim 1 , wherein the processing circuit is further configured to adjust intensity of light emitted by a portion of the plurality of light units operating in the emitting mode based on light detected by a part of the plurality of light units operating in the detecting mode.

13. The skin monitoring device according to claim 1 , further comprising at least one spacer such that the skin monitoring device emits and/or detects light at a distance from the skin of between approximately 2 and 30 mm.

14. The skin monitoring device according to claim 1 , wherein the processing circuit is further configured to determine the skin data from a ratio of at least two signals that are converted at at least two different wavelengths of the light reflected by the skin.

15. The skin monitoring device according to claim 1 , wherein the processing circuit is further configured to convert light sequentially into signals relating to different locations of the skin.

16. The skin monitoring device according to claim 1 , wherein the plurality of light units includes light units that are stacked over one another.

17. The skin monitoring device of claim 1 , wherein the processing circuit is further configured to use the map to gradually adjust intensities of the plurality of light units as a function of locations of the plurality of light units above the skin.

18. The skin monitoring device of claim 1 , wherein the processing circuit is further configured to automatically provide an indication that a user interaction is needed.

19. A method of operating a skin monitoring device, comprising acts of:
emitting light towards the skin by a plurality of light units in an emitting mode;
detecting by the plurality of light units in a detecting mode, at least one approximate wavelength of light reflected by the skin;
receiving in a signal receiving circuit, a first signal from a first light unit of the plurality of light units and a second signal from a second light unit of the plurality of light units operating in the detecting mode, and determining an amount of current excited by the light received by the first light unit and the second light unit; and
converting by a processing circuit, the determined amount of the current into skin data by comparing the determined amount of the current with reference current values associated with predetermined skin data, and selectively operating the plurality of light units in the emitting mode and the detecting mode to generate a map of the skin using the skin data,
wherein the act of emitting light includes acts of:
emitting a first light from the first light unit through a first fixed lens; and
emitting a second light from the second light unit through a second fixed lens, the first fixed lens having a first fixed focal length for a pre-specified treatment of the skin at a first depth of a desired location and directly receiving light emitted directly from the first unit and focusing the light emitted directly from the first unit directly onto the skin at the first depth, and the second fixed lens having a second fixed focal length for the pre-specified treatment of the skin at a second depth different from the first depth and directly receiving light emitted directly from th

Assignees

• Van Pieterson Liesbeth
• De Kok Margreet
• Asvadi Sima
• Hendriks Bernardus Hendrikus Wilhelmus
• Lucassen Gerhardus Wilhelmus
• Van Driel Jacqueline
• Van Der Sluis Paul
• Koninklijke Philips Nv

Inventors

• Van Pieterson Liesbeth
• De Kok Margreet
• Asvadi Sima
• Hendriks Bernardus Hendrikus Wilhelmus
• Lucassen Gerhardus Wilhelmus
• Van Driel Jacqueline
• Van Der Sluis Paul

Classifications

• A61N5/062

  Photodynamic therapy, i.e. excitation of an agent · CPC title

• A61N2005/067

  Human Necessities · mapped topic

• A61N5/0616

  Skin treatment other than tanning · CPC title

• A61B5/418

  lymph vessels, ducts or nodes · CPC title

• A61B5/445

  Evaluating skin irritation or skin trauma, e.g. rash, eczema, wound, bed sore · CPC title