| Patent Number |
Title Of Patent |
Date Issued |
| 7610174 |
System for assured reliability in DC to AC power converters |
October 27, 2009 |
| A distributed power generation system enabled for assured reliability comprises a direct current power source, a direct current to alternating current converter (DTAC), electrically coupled to the direct current power source, the DTAC comprising a reliability limiting component (RLC) |
| 7554212 |
Mechanically powered cordless pointing device |
June 30, 2009 |
| A computer peripheral system includes a computer peripheral and a mechanical input device adapted to initiate a conversion of mechanical energy to electrical energy. The computer peripheral includes an energy conversion device adapted to convert mechanical energy to electrical energy |
| 7551158 |
Display device and method for providing optical feedback |
June 23, 2009 |
| A display device for providing optical feedback includes light sources, each for emitting light in a different respective wavelength range, electro-optical elements defining pixels of an image, each for selectively passing light in one of the wavelength ranges and a sensor for measur |
| 7471040 |
Mixed-color light emitting diode apparatus, and method for making same |
December 30, 2008 |
| A mixed-color light emitting diode (LED) apparatus may be made by forming a pixellated array of LEDs on a substrate, and then placing phosphors over at least some of the LEDs. The phosphors are chosen to convert light emitted by the LEDs to one or more different colors. The LEDs may be |
| 7424382 |
Characterizing eye diagrams |
September 9, 2008 |
| Systems and methods of characterizing eye diagrams are described. In one aspect, at measurement times across a measurement interval spanning at least one unit interval of the input signal, corresponding levels of the input signal are classified into groups based on at least one threshold |
| 7380722 |
Stabilized laser pointer |
June 3, 2008 |
| A pointing device having a laser in a handheld housing is disclosed. The laser generates a light beam that exits the housing. A beam steering assembly causes the light beam to move relative to the housing. The pointer includes a housing orientation sensor that measures the orientatio |
| 7332699 |
Feed-forward methods and apparatus for setting the light intensities of one or more LEDs |
February 19, 2008 |
| In one method, an operating current of an LED is varied and, at one or more values of the operating current, a corresponding voltage of the LED is measured. The measured voltages are then used as feed-forward variables to set the light intensity of the LED. In another method, an oper |
| 7331245 |
Pressure distribution sensor and sensing method |
February 19, 2008 |
| A spatial pressure distribution sensor comprises a sensor array and a processor. The sensor array comprises an array of pressure sensors. Each of the pressure sensors is operable to generate a respective pressure signal in response to pressure applied to it. The pressure signal quant |
| 7283114 |
Systems and method for displaying images with reduced power consumption |
October 16, 2007 |
| A method and a system for displaying images are provided. In the method, a pixel is provided that includes a layer of ferroelectric material and a layer of liquid crystal material. A first electric field is momentarily applied to the pixel to electrically polarize the ferroelectric layer |
| 7280764 |
Optical signal multiplexer/demultiplexer employing pseudorandom mode modulation |
October 9, 2007 |
| An optical signal multiplexer/demultiplexer using an orthogonal pseudorandom (PRN) coding scheme for optical mode modulation to produce a plurality of independent optical signals that may be combined into one multiplex signal for transmission over an optical fiber to the receiving en |
| 7272324 |
Equalization of optical signals |
September 18, 2007 |
| Methods for performing time-domain equalization of an information signal represented by an optical signal are provided. A representative method includes: receiving the optical signal; optically splitting the optical signal into beams; optically delaying at least one of the beams; det |
| 7220959 |
Differential color sensor without filters |
May 22, 2007 |
| A semiconductor color sensor implemented without the use of color filters. Fabricating photodiodes using different semiconductor materials provide photodiodes with different sensitivities vs. wavelengths. A first embodiment uses photodiodes with different junction depths. A shallow j |
| 7218656 |
Control of spectral content of a laser diode light source |
May 15, 2007 |
| In one exemplary embodiment, apparatus is provided with a plurality of laser diodes, sensing means and control means. During normal operation, the laser diodes produce a mixed light. The sensing means measures light that is output by the laser diodes; and the control means 1) compares th |
| 7209108 |
Differential drive circuit and method for generating an a.c. differential drive signal |
April 24, 2007 |
| The differential drive circuit generates a differential drive signal having a root mean square value defined by a digital input value. The differential drive signal includes a first differential component and a second differential component. The circuit comprises a first differential |
| 7184109 |
Liquid crystal cell that resists degradation from exposure to radiation |
February 27, 2007 |
| Embodiments of the invention involve UV resistant liquid crystal cells. One embodiment of the invention is to increase the volume of the liquid crystal material that is stored inside the cell. For example, trenches may be used to provide reservoirs that hold the additional liquid crystal |
| 7133116 |
Defect mitigation in spatial light modulator used for dynamic photolithography |
November 7, 2006 |
| A spatial light modulator for use in a photolithography system includes light modulation elements configured to photolithographically transfer an image onto a substrate using an optical oversampling technique to reduce defects in the transferred image. A first set of the light modulation |
| 7082238 |
Self-aligning optical interconnect utilizing conformal materials |
July 25, 2006 |
| An optical waveguide such as an optical fiber extends across a semi-rigid substrate or optical back plane and is made of conformal materials having indices of refraction selected to provide substantially total internal reflection of light transmitted within a core. An optical pin is made |
| 7071717 |
Universal test fixture |
July 4, 2006 |
| A universal fixture for testing a device, such as a bare printed circuit board, includes a plurality of addressable contact points. Each of the contact points includes a switch connected to a conductor capable of creating an electrical connection to the device. To obtain a measurement |
| 7020397 |
Optical retiming of an optical data signal |
March 28, 2006 |
| An optical retimer is provided that retimes an optical data signal entirely in the optical domain, thus eliminating the need for optical-to-electrical and electrical-to-optical converters, which are needed to perform retiming in the electrical domain. Eliminating these conversion ste |
| 6956996 |
Tri-state optical systems and methods |
October 18, 2005 |
| Optical systems are provided. A representative optical system includes an optical transceiver with an optical source and an optical receiver. The system also includes an optical bus. At least one of the optical source and the optical receiver is optically coupled to an intermediate porti |
| 6858829 |
Avalanche photodiode array biasing device and avalanche photodiode structure |
February 22, 2005 |
| A photodiode array includes a plurality of arrayed individual diode devices. The arrayed diode devices include at least one active photodiode and at least one reference diode. A bias control circuit for the array monitors operation of the reference diode at an applied first bias voltage |
| 6780678 |
Cooling of optoelectronic elements |
August 24, 2004 |
| Optical systems for cooling optoelectronic elements are provided. A representative optical system includes a substrate and a first optoelectronic element supported by the substrate. Additionally, a first channel is formed in the substrate and a first heat transfer fluid is arranged i |
| 6757095 |
Semiconductor structure and method for transmitting optical signals using externally supplied li |
June 29, 2004 |
| A semiconductor structure and method for transmitting optical signals modulates an optical property of the semiconductor structure to selectively transmit portions of an externally supplied light beam as optical signals. The use of the externally supplied light beam eliminates the ne |
| 6756018 |
Method and apparatus for selective execution of microfluidic circuits utilizing electrically add |
June 29, 2004 |
| A microfluidic system for steering subject materials to a next processing region includes a substrate having at least one embedded gas generator that is activated in response to the result of an initial process, whereby a gas is formed having pressure to steer the subject materials to th |
| 6754417 |
Optical fiber tap capable of random placement along an optical fiber |
June 22, 2004 |
| The optical fiber tap establishes optical communication between a branch optical fiber and a main optical fiber and includes a housing, a serpentine main channel and a branch channel. The main channel is defined in the housing and is shaped to accommodate part of the main optical fib |
| 6750939 |
System and method for manufacturing liquid crystal micro displays |
June 15, 2004 |
| A liquid crystal micro display (lcmd) is manufactured by creating a hole in an lcmd surface, filling the lcmd with liquid crystal material through the hole, and then sealing the hole. The invention allows an lcmd to be tested before it is separated from other lcmds and packaged. As a res |
| 6735328 |
Personal viewing device with system for providing identification information to a connected syst |
May 11, 2004 |
| A personal display system having an ocular scan unit for generating user identification information and an interface for conveying user identification to a connected system. |
| 6721029 |
Electro-optical material-based display device |
April 13, 2004 |
| A microdisplay is provided in which a display area, a bonding pad connected to the display area, and a contact pad operatively connected to the bonding pad are all located on a silicon die. An electrically conductive, coated glass is located over the display area and is electrically |
| 6713866 |
Cooling of optoelectronic elements |
March 30, 2004 |
| Optical systems for cooling optoelectronic elements are provided. A representative optical system includes a substrate and a first optoelectronic element supported by the substrate. Additionally, a first channel is formed in the substrate and a first heat transfer fluid is arranged i |
| 6448550 |
Method and apparatus for measuring spectral content of LED light source and control thereof |
September 10, 2002 |
| Solid state illumination using closed loop spectral control. Light emitting diodes producing different colors are mounted in close proximity to photosensors. Spectral content of the light emitting diodes is measured by the photosensors, and these measurements used to adjust light emittin |
| 6362573 |
Apparatus and method for monitoring the life of arc lamp bulbs |
March 26, 2002 |
| An apparatus and method are described for monitoring the life of an arc lamp bulb. The apparatus includes a memory that stores a threshold property value. An arc lamp bulb property sensor acquires a current arc lamp bulb property value. A control circuit compares the current arc lamp |
| 6344641 |
System and method for on-chip calibration of illumination sources for an integrated circuit disp |
February 5, 2002 |
| 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 inte |
| 6169505 |
Multi-channel, parallel, matched digital-to-analog conversion method, multi-channel, parallel, m |
January 2, 2001 |
| Matched digital-to-analog conversions are performed in which, in each of N parallel channels, a digital input word is converted into a corresponding analog output. A digital sequence is generated, a time-varying analog signal having a predetermined relationship to the digital sequence is |
