Patent application number | Description | Published |
20080203307 | Encoded binary liveness detector - A device for detecting the presence of human skin including an illuminator source for providing a first encoded IR band and a second encoded IR band. The first encoded IR band is capable of being reflected from skin and the second encoded IR band is capable of being absorbed by skin. A detector receives the first and second encoded IR band after the bands have contacted the skin and provides an encoded signal indicating the presence or absence of each of the first and second IR bands. A processing unit decodes and processes the signal and indicates the presence of skin when the first IR band is present and the second IR band is absent. | 08-28-2008 |
20080219514 | Skin detection sensor - 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. | 09-11-2008 |
20090051551 | Apparatus and method for wireless location sensing - A sensor assembly includes a sensor configured to detect at least one material or condition, such as a smoke detector, fire detector, or carbon monoxide detector. The sensor assembly also includes a base configured to be mounted on a structure, such as a wall or ceiling, and to receive the sensor. The sensor assembly further includes a wireless module located between the sensor and the base. The wireless module is configured to transmit position information. The wireless module may include one or more electrical contacts used to form at least one electrical connection between the base of the sensor assembly and the sensor. The wireless module may also include a printed circuit board having the contacts, wireless radio circuitry, an antenna, and other components. The printed circuit board could be substantially hidden from view when the sensor is attached to the base and the base is mounted on the structure. | 02-26-2009 |
20150022355 | SURVEILLANCE SYSTEMS AND METHODS - Surveillance systems and methods are described herein. Surveillance systems and methods can include detecting a number of interactions within a building, determining an event based on the number of interactions, and sending a message to a number of contacts relating to the event | 01-22-2015 |