Skin detection sensor
View Patent ↗A device for detecting the presence of human skin including an illuminator source for providing an IR band at a predetermined frequency known as a blue LED. The IR band frequency ranges from about 400 nanometers (nm) to about 500 nm, and preferably from about 450 nm to about 485 nm. Most preferred is a blue LED with a frequency of about 468 nm. The band is reflected off a target and received by a sensor such as a photo detector. The value for human skin is compared to the signal detected. Other materials that have been used to spoof detectors have different values and thus are distinguished from human skin.
1. A biometric device for detecting a presence of human skin rather than a gelatin-based candy used to mimic human skin, comprising:
an illuminator source for providing a blue LED light source at a frequency of approximately 468 nanometers, wherein said blue LED light source is reflected from human skin;
a photodiode detector for receiving said blue LED light source after said blue LED light source has contacted said human skin and for providing a signal representative of said blue LED light source after said blue LED light source is reflected from said human skin;
a detector processing unit for comparing said signal with a known reflectivity value of human skin and a known reflectivity value of said gelatin-based candy used to mimic human skin, indicating said presence of said human skin if said signal matches said known reflectivity value of human skin, and positively determining said presence of said human skin prior to processing data collected from said biometric device; and
a data processing unit that processes data collected from said human skin, wherein said data processing unit allows access to a controlled area or electronic equipment if said human skin indicates that an associated human is allowed access to said controlled area or said electronic equipment.
2. The biometric device of claim 1 , wherein said photodiode detector is a part of a phototransistor detector.
3. The biometric device of claim 1 , wherein data processing comprises comparing fingerprints detected from said human skin to a database of collected fingerprint information.
4. The biometric device of claim 1 , wherein data processing comprises comparing an iris detected using said detection unit to a database of collected iris information.
5. The biometric device of claim 1 wherein said electronic equipment comprises at least one of the following types of electronic equipment: a computer or a mobile communications device.
6. A biometric device for detecting a presence of human skin rather than a gelatin-based candy used to mimic human skin, comprising:
illuminator source means for providing a blue LED light source at a frequency of approximately 468 nanometers, wherein said blue LED light source is reflected from human skin;
photodiode detector means for receiving said blue LED light source after said blue LED light source has contacted said human skin and for providing a signal representative of said blue LED light source after said blue LED light source is reflected from said human skin;
detector processing unit means for comparing said signal with a known reflectivity value of human skin and a known reflectivity value of said gelatin-based candy used to mimic human skin, indicating said presence of said human skin if said signal matches said known reflectivity value of human skin, and positively determining said presence of said human skin prior to processing data collected from said biometric device; and
data processing unit means for processing data collected from said human skin, wherein said data processing unit allows access to a controlled area or electronic equipment if said human skin indicates that an associated human is allowed access to said controlled area or said electronic equipment.
7. The biometric device of claim 6 , wherein said photodiode detector means is a part of a phototransistor detector means.
8. The biometric device of claim 6 , wherein data processing comprises comparing fingerprints detected from said human skin to a database of collected fingerprint information.
9. The biometric device of claim 6 , wherein data processing comprises comparing an iris detected using said detection unit to a database of collected iris information.
10. The biometric device of claim 6 wherein said electronic equipment comprises at least one of the following types of electronic equipment: a computer or a mobile communications device.
11. A method for detecting a presence of human skin rather than a gelatin-based candy used to mimic human skin, comprising the steps of:
providing a blue LED light at a frequency of approximately 468 nanometers, wherein said blue LED light source is reflected from human skin;
directing said blue LED light source against an object proposed to be said human skin;
positioning a photodiode detector to receive said blue LED light source after said blue LED light source has contacted said human skin and to provide a signal representative of said blue LED light source after said blue LED light source is reflected from said human skin;
comparing said signal with a known reflectivity value of human skin and a known reflectivity value of said gelatin-based candy used to mimic human skin, indicating said presence of said human skin if said signal matches said known reflectivity value of human skin, and positively determining said presence of said human skin prior to processing data collected from said biometric device, whereby a value outside of said known value indicates a presence of a material other than said human skin; and
processing data collected from said human skin, wherein data processing unit allows access to a controlled area or electronic equipment if said human skin indicates that an associated human is allowed access to said controlled area or said electronic equipment.
12. The method of claim 11 , wherein said photodiode detector is a part of a phototransistor detector.
13. The method of claim 11 , wherein data processing comprises comparing fingerprints detected from said human skin to a database of collected fingerprint information.
14. The method of claim 11 , wherein data processing comprises comparing an iris detected using said detection unit to a database of collected iris information.
15. The method of claim 11 wherein said electronic equipment comprises at least one of the following types of electronic equipment: a computer or a mobile communications device.