Patents by Inventor Walter G. Scott

Walter G. Scott has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7514842
    Abstract: Provided is a multiplexer for a biometric apparatus. The multiplexer includes a plurality of first conductors coupled to the first ends of piezo ceramic elements in corresponding rows and a plurality of first switches each of which is coupled to a respective one of the first conductors and a plurality of second conductors coupled to the second ends of piezo ceramic elements in corresponding columns. The multiplexer also includes a plurality of second switches each of which is coupled to a respective one of the second conductors. The first conductors are approximately orthogonal to the second conductors, and the first switches are controlled to couple a signal output from an output port of the signal generator to a particular piezo ceramic element of the at least twenty five thousand piezo ceramic elements. The second switches are controlled to couple a signal associated with the particular piezo ceramic element of the at least twenty five thousand piezo ceramic elements to an input port of the processor.
    Type: Grant
    Filed: June 27, 2006
    Date of Patent: April 7, 2009
    Assignee: Sonavation, Inc.
    Inventor: Walter G. Scott
  • Patent number: 7489066
    Abstract: The present invention provides an apparatus for sensing biometric information in a finger with piezo ceramic elements. In one embodiment, the apparatus includes an array of discrete piezo ceramic elements and filler. The array of discrete piezo ceramic elements is responsive to acoustic characteristics of parts of the finger. The filler is distributed between the discrete piezo ceramic elements and provides acoustic attenuation and electric isolation between the discrete piezo ceramic elements. A protective layer can receive a ridge pattern of the finger positioned proximate to the array. Air in valleys between ridges of the ridge pattern of the finger acts as an acoustic barrier. A backing layer (air or foam) can also be provided.
    Type: Grant
    Filed: June 10, 2005
    Date of Patent: February 10, 2009
    Assignee: Sonavation, Inc.
    Inventors: Walter G. Scott, Donald E. Jones
  • Publication number: 20080175450
    Abstract: A piezoelectric thin film sensor array is used to scan and capture biometric data, for example, a fingerprint image. In one embodiment, a multi-layer structure includes a PVDF layer in between two conductor grids arranged orthogonally to one another. Urethane can be added to one side where a finger is placed. A foam substrate can be used as a support. In one feature, the PVDF, and grids can be peeled off like a label for easy replacement. Multiplexers are switched to scan the sensor. A single pixel or a group of pixels can be detected and output to an image memory. The presence of a fingerprint ridge is detected by virtue of a ring-down oscillation that arises from reflection when an electric field is applied to the piezoelectric thin film sensor array at a pixel in contact with the fingerprint ridge. For example, such a ring-down value associated with a fingerprint ridge can be detected at about 150 ns. (or 5 cycles at 30 MHZ). Other reflections indicative of additional biometrics (e.g.
    Type: Application
    Filed: June 26, 2007
    Publication date: July 24, 2008
    Applicant: Cross Match Technologies, Inc.
    Inventor: Walter G. Scott
  • Patent number: 7308122
    Abstract: A system and method for obtaining a biometric image such as a ten-print fingerprint impression is provided. The system and method can include a ten-print scanner having a platen and a finger guide coupled to the platen. The finger guide can be used to guide positioning a finger slap of four fingers at a time onto the platen. The ten-print scanner can also include at least four indicators that indicate an acceptable scan condition of each finger of a finger slap in response to a detected finger slap image.
    Type: Grant
    Filed: January 16, 2003
    Date of Patent: December 11, 2007
    Assignee: Cross Match Technologies, Inc.
    Inventors: George W McClurg, John F Carver, Walter G Scott, Gregory Zyzdryn
  • Patent number: 7271881
    Abstract: Systems and methods for illuminating a platen are provided. A hybrid illumination system uses both diffusion and collimation to efficiently provide a flat, uniform illumination at a platen. One or more diffusers are disposed between the illumination source array and a collimating lens. An illumination system is provided which uses diffused light to illuminate a platen in a print scanner. The illumination system has an illumination source array and a light wedge. The light wedge reflects light internally which makes the illumination even more diffuse. Sources are divided into at least a center region and a perimeter region. The density of sources provided in the perimeter region is greater than in the center region to correct for natural light falloff in the illumination system. Intensity control can be performed individually or in groups.
    Type: Grant
    Filed: October 7, 2005
    Date of Patent: September 18, 2007
    Assignee: Cross Match Technologies, Inc.
    Inventors: Joseph F. Arnold, John F. Carver, Trent G. Francis, Richard D. Irving, George W. McClurg, Walter G. Scott
  • Patent number: 7236616
    Abstract: A piezoelectric thin film sensor array is used to scan and capture biometric data, for example, a fingerprint image. In one embodiment, a multi-layer structure includes a PVDF layer in between two conductor grids arranged orthogonally to one another. Urethane can be added to one side where a finger is placed. A foam substrate can be used as a support. In one feature, the PVDF, and grids can be peeled off like a label for easy replacement. Multiplexers are switched to scan the sensor. A single pixel or a group of pixels can be detected and output to an image memory. The presence of a fingerprint ridge is detected by virtue of a ring-down oscillation that arises from reflection when an electric field is applied to the piezoelectric thin film sensor array at a pixel in contact with the fingerprint ridge. For example, such a ring-down value associated with a fingerprint ridge can be detected at about 150 ns. (or 5 cycles at 30 MHZ). Other reflections indicative of additional biometrics (e.g.
    Type: Grant
    Filed: August 9, 2000
    Date of Patent: June 26, 2007
    Assignee: Cross Match Technologies, Inc.
    Inventor: Walter G Scott
  • Patent number: 7203344
    Abstract: A method and system of obtaining a ten-print plain impression fingerprint includes scanning a print image, processing the scanned image, separating the processed image into individual fingerprint images, and determining how many print images have been scanned. The method also includes comparing the print image to a previously scanned print image, quality classifying the separated images, indicating a quality classification of the print image based on the classifying step, and determining whether the print image is of a good quality. The system can include a ten-print scanner having a finger guide and a platen used to position four finger slaps onto the platen.
    Type: Grant
    Filed: January 16, 2003
    Date of Patent: April 10, 2007
    Assignee: Cross Match Technologies, Inc.
    Inventors: George W McClurg, John F Carver, Walter G Scott, Gregory Zyzdryn
  • Patent number: 7141918
    Abstract: Provided are a method and system for a biometric sensing apparatus. An apparatus includes an input signal generator configured to produce an activation signal. Also includes is a piezoelectric ceramic sensor having a plurality of piezoelectric ceramic elements arrayed and spaced to (i) receive the activation signal (ii) detect one or more features of a digit proximate to the array in accordance with the received activation signal and (iii) produce output signals representative thereof. A processor is coupled to the sensor to process the output signals.
    Type: Grant
    Filed: November 2, 2004
    Date of Patent: November 28, 2006
    Assignee: Cross Match Technologies, Inc.
    Inventor: Walter G. Scott
  • Patent number: 7132780
    Abstract: Provided are a method and system for a biometric sensing apparatus. An apparatus includes an input signal generator configured to produce an activation signal. Also includes is a piezoelectric ceramic sensor having a plurality of piezoelectric ceramic elements arrayed and spaced to (i) receive the activation signal (ii) detect one or more features of a digit proximate to the array in accordance with the received activation signal and (iii) produce output signals representative thereof. A processor is coupled to the sensor to process the output signals.
    Type: Grant
    Filed: November 2, 2004
    Date of Patent: November 7, 2006
    Assignee: Cross Match Technologies, Inc.
    Inventor: Walter G. Scott
  • Patent number: 7068822
    Abstract: A system and method for sending a packet with a position address and line scan data from a first device over a 1394 interface to a second device. The present invention loads a camera, an illuminator, and a microprocessor with set-up instructions and a start pulse. The camera captures a line-by-line image of an object placed on the surface of a sliding prism. Position data, corresponding to the captured line-by-line image, is logged as the position address. The position address is combined with the line-by-line image to form a packet. The packet is sent to the second device for processing and viewing the image.
    Type: Grant
    Filed: December 18, 2002
    Date of Patent: June 27, 2006
    Assignee: Cross Match Technologies, Inc.
    Inventor: Walter G Scott
  • Patent number: 7067962
    Abstract: Provided is a multiplexer for a biometric apparatus. The multiplexer includes a plurality of first conductors coupled to the first ends of piezo ceramic elements in corresponding rows and a plurality of first switches each of which is coupled to a respective one of the first conductors and a plurality of second conductors coupled to the second ends of piezo ceramic elements in corresponding columns. The multiplexer also includes a plurality of second switches each of which is coupled to a respective one of the second conductors. The first conductors are approximately orthogonal to the second conductors, and the first switches are controlled to couple a signal output from an output port of the signal generator to a particular piezo ceramic element of the at least twenty five thousand piezo ceramic elements. The second switches are controlled to couple a signal associated with the particular piezo ceramic element of the at least twenty five thousand piezo ceramic elements to an input port of the processor.
    Type: Grant
    Filed: November 2, 2004
    Date of Patent: June 27, 2006
    Assignee: Cross Match Technologies, Inc.
    Inventor: Walter G. Scott
  • Patent number: 7020474
    Abstract: A first portable wireless communication device enters a PICONET and establishes unencrypted communications with a second wireless communication device, the PICONET master. The first portable wireless communication device transmits identification information to the second wireless communication device using a conventional short-distance communications protocol. The second wireless communication device transmits, in a novel FEMTONET communications mode, an encryption key to the first portable wireless communication device. The first portable wireless communication device then securely transmits encrypted messages based on the encryption key to the second wireless communication device using the conventional short-distance communications protocol.
    Type: Grant
    Filed: June 24, 2004
    Date of Patent: March 28, 2006
    Assignee: Cross Match Technologies, Inc.
    Inventor: Walter G. Scott
  • Patent number: 6954260
    Abstract: Systems and methods for illuminating a platen are provided. A hybrid illumination system uses both diffusion and collimation to efficiently provide a flat, uniform illumination at a platen. One or more diffusers are disposed between the illumination source array and a collimating lens. An illumination system is provided which uses diffused light to illuminate a platen in a print scanner. The illumination system has an illumination source array and a light wedge. The light wedge reflects light internally which makes the illumination even more diffuse. An illumination source array has a plurality of sources that emit blue/green light. In one preferred example, the blue/green light is equal to or approximately equal to 510 nm. Sources are divided into at least a center region and a perimeter region. The density of sources provided in the perimeter region is greater than in the center region to correct for natural light falloff in the illumination system.
    Type: Grant
    Filed: January 17, 2002
    Date of Patent: October 11, 2005
    Assignee: Cross Match Technologies, Inc.
    Inventors: Joseph F. Arnold, John F. Carver, Trent G. Francis, Richard D. Irving, George W. McClurg, Walter G. Scott
  • Patent number: 6928195
    Abstract: A system and method for increasing image resolution in a palm print scanner. The method of the invention requires the synchronization of a nutating mirror with a camera frame sync. A first image is scanned at a first nutation position. The mirror is nutated by a fraction of a pixel amount in one direction. Another image is scanned at a second nutation position. The process of nutating the mirror to a different nutation position and scanning an image is repeated until all sub-pixels needed to increase an image resolution are obtained. All of the sub-pixels obtained are then interlaced to obtain a higher resolution image.
    Type: Grant
    Filed: December 18, 2001
    Date of Patent: August 9, 2005
    Assignee: Cross Match Technologies, Inc.
    Inventors: Walter G. Scott, John Van Dusen, Richard D. Irving
  • Patent number: 6844660
    Abstract: Methods for obtaining biometric identification data for an individual using a sensor and a processor coupled to the sensor are presented. In an embodiment, the present invention involves placing a portion of a biological object such as a finger, thumb, palm or foot of the individual proximate to piezo ceramic elements of the sensor and generating an output signal with the sensor that is representative of at least one feature of the biological object. The output signal is processed using the processor to produce biological data useful for identifying the individual. In an embodiment of the present invention, the sensor includes at least fifty thousand piezo ceramic elements arranged in an array. These piezo ceramic elements are spaced on a pitch equal to or less than approximately two hundred microns. A multiplexer couples the output of the sensor to the processor.
    Type: Grant
    Filed: July 21, 2003
    Date of Patent: January 18, 2005
    Assignee: Cross Match Technologies, Inc.
    Inventor: Walter G. Scott
  • Patent number: 6812621
    Abstract: A multiplexer for a biometric apparatus having at least fifty thousand piezo ceramic sensor elements arranged in a two-dimensional array on a pitch spacing equal to or less than approximately two hundred microns. The multiplexer includes a plurality of first and second orthogonal conductors. Each of the first conductors is coupled to Y piezo ceramic sensor elements. Each of the second conductors is coupled to X piezo ceramic sensor elements. Switches couple the first conductors to either an output port of a signal generator, a high impedance node, or a low impedance node. Switches also couple the second conductors to either an input port of a processor, a high impedance node, or a low impedance node. Shift registers coupled to the switches are used to control the position of the switched.
    Type: Grant
    Filed: July 21, 2003
    Date of Patent: November 2, 2004
    Assignee: Cross Match Technologies, Inc.
    Inventor: Walter G. Scott
  • Publication number: 20040140735
    Abstract: The present invention provides an apparatus for sensing biometric information in a finger with piezo ceramic elements. In one embodiment, the apparatus includes an array of discrete piezo ceramic elements and filler. The array of discrete piezo ceramic elements is responsive to acoustic characteristics of parts of the finger. The filler is distributed between the discrete piezo ceramic elements and provides acoustic attenuation and electric isolation between the discrete piezo ceramic elements. A protective layer can receive a ridge pattern of the finger positioned proximate to the array. Air in valleys between ridges of the ridge pattern of the finger acts as an acoustic barrier. A backing layer (air or foam) can also be provided.
    Type: Application
    Filed: July 29, 2003
    Publication date: July 22, 2004
    Applicant: Cross Match Technologies, Inc.
    Inventors: Walter G. Scott, Donald E. Jones
  • Patent number: 6720712
    Abstract: An identification device having a piezoelectric sensor array is used to obtain biometric data. Multiplexers are switched to control the sensor. The device has several operating modes for obtaining a variety of biometric data, including an impedance detection mode, a voltage detection mode, an imaging mode, and a Doppler-shift detection mode. The presence of a fingerprint on the sensor can be used to turn-on the device. The device is capable of capturing a fingerprint, forming a three-dimensional map of a finger bone, and/or determining the direction and speed of arteriole and/or capillary blood flow in a finger. A single pixel or a group of pixels can be detected and readout to a memory. The device can be used as an electronic signature device. The device can operate as part of a personal area network, using a public service layer according to the invention.
    Type: Grant
    Filed: March 23, 2001
    Date of Patent: April 13, 2004
    Assignee: Cross Match Technologies, Inc.
    Inventors: Walter G. Scott, Donald E. Jones
  • Publication number: 20040016298
    Abstract: Methods for obtaining biometric identification data for an individual using a sensor and a processor coupled to the sensor are presented. In an embodiment, the present invention involves placing a portion of a biological object such as a finger, thumb, palm or foot of the individual proximate to piezo ceramic elements of the sensor and generating an output signal with the sensor that is representative of at least one feature of the biological object. The output signal is processed using the processor to produce biological data useful for identifying the individual. In an embodiment of the present invention, the sensor includes at least fifty thousand piezo ceramic elements arranged in an array. These piezo ceramic elements are spaced on a pitch equal to or less than approximately two hundred microns. A multiplexer couples the output of the sensor to the processor.
    Type: Application
    Filed: July 21, 2003
    Publication date: January 29, 2004
    Inventor: Walter G. Scott
  • Publication number: 20040017132
    Abstract: A multiplexer for a biometric apparatus having at least fifty thousand piezo ceramic sensor elements arranged in a two-dimensional array on a pitch spacing equal to or less than approximately two hundred microns. The multiplexer includes a plurality of first and second orthogonal conductors. Each of the first conductors is coupled to Y piezo ceramic sensor elements. Each of the second conductors is coupled to X piezo ceramic sensor elements. Switches couple the first conductors to either an output port of a signal generator, a high impedance node, or a low impedance node. Switches also couple the second conductors to either an input port of a processor, a high impedance node, or a low impedance node. Shift registers coupled to the switches are used to control the position of the switched.
    Type: Application
    Filed: July 21, 2003
    Publication date: January 29, 2004
    Applicant: Cross Match Technologies, Inc.
    Inventor: Walter G. Scott