Travis Nelson Blalock, 633420 Horseshoe Bend Rd, Charlottesville, VA 22901

6344641, Feb 5, 2002

Aug 11, 1999

09/372359

Travis N. Blalock - Charlottesville VA
Ken A. Nishimura - Fremont CA

Agilent Technologies, Inc. - Palo Alto CA

G01J 132

250205, 315156, 327514

An on-chip system and method for calibrating an illumination source includes a photo-detector and intensity sense and control circuitry resident on an integrated circuit. The integrated circuit is illuminated by an illumination source, which impinges upon the photo-detector. The intensity sense and control circuitry receives the measured intensity value of the illumination source and compares the measured intensity to a predetermined value representing the desired intensity. Subject to a range of operation, the intensity sense and control circuitry adjusts the intensity of the illumination source based upon the difference between the measured illumination intensity and the desired illumination intensity.

6441829, Aug 27, 2002

Nov 18, 1999

09/409236

Travis N. Blalock - Charlottesville VA
Ken Nishimura - Fremont CA

Agilent Technologies, Inc. - Palo Alto CA

G09G 500

345690, 345 99, 345100, 341141

A digital pixel driver that operates in response to an M-bit digital input value defining the apparent brightness of the pixel. The pixel driver generates a pixel drive signal having a duty cycle that sets the apparent brightness of the pixel. The pixel driver comprises a memory, a digital sequence generator and a comparator. The memory receives and stores an N-bit word that represents the digital input value. The digital sequence generator generates a digital sequence of P-bit digital values that defines the temporal duration of the pixel drive signal and includes a first P-bit word that represents at least part of the digital input value at a location temporally corresponding to the duty cycle of the pixel drive signal as defined by the at least part of the digital input value. The comparator is connected to receive the digital sequence from the digital sequence generator and a second P-bit word from the memory. The second P-bit word constitutes at least part of the N-bit word.

6586283, Jul 1, 2003

Mar 30, 2000

09/539490

John J. Corcoran - Portola Valley CA
Travis N. Blalock - Charlottesville VA
Paul J. Vande Voorde - San Mateo CA
Thomas A. Knotts - Palo Alto CA
Neela B. Gaddis - Saratoga CA

Agilent Technologies, Inc. - Palo Alto CA

H01L 31332

438140, 438 48, 438570, 438454

An apparatus and a method for protecting charge storage elements from photo-induced currents in silicon integrated circuits are provided. In order to protect against photo-induced currents that are generated outside the storage node circuits themselves, an n-well guard ring is placed as closely as possible to the transistors and other elements in the storage node circuits. As a result there is a minimum of exposed silicon area in which light can produce current in areas next to the storage node circuits, and the n-well guard ring captures photo-induced currents that are generated outside the storage node circuits. In order to protect against the photo-induced currents that are generated inside the storage node circuits, an aluminum interconnect layer is placed on top of the storage node circuit, separated by an insulating layer of silicon dioxide. This creates a shield against the light and protects the storage node circuit by reflecting light away.

6700561, Mar 2, 2004

Oct 31, 2000

09/703418

Douglas Sojourner - Fremont CA
Jeanne M Hermsen - Corvallis OR
Xuemei Zhang - Mountain View CA
Travis N Blalock - Charlottesville VA

Agilent Technologies, Inc. - Palo Alto CA

G09G 336

345 97, 345 89, 345 99, 345204

A system and method for using gamma correction in a ferroelectric liquid crystal (FLC) display uses a reduced number of different increment values for generating a Vramp signal for the FLC display without noticeably increasing error. The increment values are based upon an inverse gamma curve having a selected gamma value. Using linear interpolation, the increment values are calculated with more increment values being calculated for the beginning of the curve than the flatter end portion of the curve. In addition, an illumination period and a balance period are used so that each pixel of the FLC display is on and off for the same amount of time. As a result, the average voltage across the FLC material is 0V.

6795064, Sep 21, 2004

Sep 7, 2001

09/948732

Richard C. Walker - Palo Alto CA
Travis N. Blalock - Santa Clara CA
Neela B. Gaddis - Saratoga CA

Agilent Technologies, Inc. - Palo Alto CA

G09G 336

345204, 345 98, 345100

A grey scale is generated by modulating light in response to an information signal using an electro-optical material. An analog sample is derived from the information signal, a drive signal is generated in response to the analog sample and the drive signal is applied to the electro-optical material. The drive signal has a sequence of a first temporal portion and a second temporal portion. The first temporal portion has a temporal duration that has a pre-determined relationship to the analog sample, and the second temporal portion is the temporal complement of the first temporal portion.

6900440, May 31, 2005

Feb 26, 2001

10/204676

Michael L. Reed - Charlottesville VA, US
Travis N. Blalock - Charlottesville VA, US

University of Virginia Patent Foundation - Charlottesville VA

G01J005/06

2503381, 250332

The infrared (IR) sensing apparatus () and related method achieves improvement over traditional infrared sensors by levitating or suspending the IR platform () to reduce the loss of IR energy, which normally dissipates in the form of heat. The levitating IR sensitive platform () of the present invention has no contact with the substrate () during energy absorption, thus eliminating a substantial disadvantage existing in the conventional systems proposed heretofore.

7158659, Jan 2, 2007

Apr 18, 2003

10/418968

Izhak Baharav - San Jose CA, US
Travis N. Blalock - Charlottesville VA, US
Akihiro Machida - Cupertino CA, US
George E. Smith - Cupertino CA, US
Jin Kiong Ang - Penang, MY

Avago Technologies ECBU IP (Singapore) Pte. Ltd. - Singapore

G06K 7/00
G06K 9/00
G06K 9/20

382124, 382312

An apparatus for imaging a fingerprint operates in a selected mode to provide a finger recognition and/or a finger navigation application. At least one light source illuminates at least one partition of a finger interface upon which a user places a finger (or thumb). Light reflected from the finger is captured by at least one image sensing region aligned to receive reflected light emitted from the illuminating light source(s). The illuminating light sources are selected depending on the selected mode of operation to illuminate only those partitions of the finger interface necessary for operation of the selected mode.

7274808, Sep 25, 2007

Apr 18, 2003

10/419226

Izhak Baharav - San Jose CA, US
Travis N. Blalock - Charlottesville VA, US
Akihiro Machida - Cupertino CA, US
George E. Smith - Cupertino CA, US
Jin Kiong Ang - Penang, MY

Avago Technologies ECBU IP (Singapore)PTE Ltd - Singapore

G06K 9/00
G06K 9/20

382124, 382187, 382312

An imaging system for imaging a fingerprint operates in at least two different modes to provide both finger recognition and finger navigation applications. A light source illuminates a swipe interface having an elongated sensing area upon which a user swipes a finger. Light reflected from the finger is captured by an optical image sensor as image data representing a sequence of images resulting from motion of the digit over the sensing area of the swipe interface. The captured image data is output by the optical image sensor for processing of the data in one of the at least two different modes.