Plural Photosensitive Nonimage Detecting Elements Patents (Class 250/208.2)
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Publication number: 20140209790Abstract: An electro-optic rearview mirror system is provided. The electro-optic rearview mirror system includes an inside electro-optic rearview mirror element and an outside electro-optic rearview mirror element in series with the inside electro-optic rearview mirror element. A drive circuit is in electrical communication with the inside electro-optic rearview mirror element and the outside electro-optic rearview mirror element and includes a first power operational amplifier and a second power operational amplifier, both of which are configured as voltage followers. The drive circuit is configured to apply overvoltage to the inside electro-optic rearview mirror element if the outside electro-optic rearview mirror element is shorted.Type: ApplicationFiled: January 24, 2014Publication date: July 31, 2014Applicant: Gentex CorporationInventors: Robert R. Turnbull, G. Bruce Poe
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Publication number: 20140209788Abstract: Systems and methods for an improved solar/infrared conversion efficiency using multiple rectennas, one for each band of the spectrum. Each rectenna is optimally efficient for each spectrum band. An antenna receives at least one of a visible or infrared spectrum. Rectifying circuits coupled to the antenna generate a current based on a portion of the spectrum received by the at least one antenna. Each rectenna operates efficiently using a different operating voltage. The operating voltages are based on the selected load resistor and the current-voltage characteristics for the diode of the rectifying circuit at the associated spectrum portion.Type: ApplicationFiled: October 25, 2013Publication date: July 31, 2014Applicant: THE REGENTS OF THE UNIVERSITY OF COLORADO, a body corporateInventors: Garrett Moddel, Saumil Joshi
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Publication number: 20140209787Abstract: A system includes a photodetector, a first amplifier, a second amplifier, and a filter. The photodetector is to detect backscattered light from liquid drops to provide a current signal. The first amplifier is to convert the current signal into a first voltage signal. The second amplifier is to amplify the first voltage signal to provide a second voltage signal, and the filter is to filter the second voltage signal to provide an output signal to indicate the presence or absence of liquid drops.Type: ApplicationFiled: January 25, 2013Publication date: July 31, 2014Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.Inventors: Algird M. Gudaitis, David E. Smith
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Publication number: 20140203172Abstract: A method of detecting a laser beam emitted by a laser tool includes receiving light via an optical window of a receiver unit, and directing the light received via the optical window onto a first light sensor array and a second light sensor array. At least one signal is output from the first light sensor array indicating a characteristic of the light incident upon the first light sensor array. At least one signal is output from the second light sensor array indicating a characteristic of the light incident upon the second light sensor array. The at least one signal from the first light sensor array and the at least one signal from the second light sensor array are processed with respect to each other to produce a measurement signal. A determination is then made whether the received light is a laser beam emitted by the laser tool based on the measurement signal.Type: ApplicationFiled: December 27, 2013Publication date: July 24, 2014Applicants: Robert Bosch GmbH, Robert Bosch Tool CorporationInventors: Jay R. Munroe, Nathan J. Light, Antony J. Wilks
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Publication number: 20140197305Abstract: There is provided an optical apparatus including a substrate, a light emitting device, a light sensitive device and a plurality of micro-lenses. The light emitting device is disposed on the substrate and adapted to provide a light beam. The light sensitive device is disposed on the substrate and adapted to receive a light beam reflected from an object, wherein the light sensitive device has a plurality of photosensitive units arranged in matrix. The micro-lenses are disposed above the light sensitive device and respectively opposite to the associated photosensitive units. There is further provided a light sensitive device with micro-lens and a manufacturing method thereof.Type: ApplicationFiled: December 31, 2013Publication date: July 17, 2014Applicant: PIXART IMAGING INC.Inventors: EN-FENG HSU, CHIA-YU LIU, CHING-WEI CHEN
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Patent number: 8779346Abstract: An apparatus and method for forming a digital image are disclosed. The apparatus includes a plurality of pixel sensors and a controller. Each sensor includes a photodiode, a floating diffusion node that can be selectively connected to said photodiode or a reset voltage, and an analog-to-digital converter (ADC) connected to the floating diffusion node, the ADC converting a voltage on the floating diffusion node to a digital value. Each pixel sensor also includes an output circuit that connects the ADC to a bus. The apparatus also includes a controller that causes the ADCs to operate in parallel to convert the voltages on the floating diffusion nodes to the digital values in a time that is less than the time needed for the floating diffusion node to acquire ten electron equivalents of noise. The optional apparatus includes circuitry that allows correlated double sampling to be performed in each sensor.Type: GrantFiled: May 14, 2012Date of Patent: July 15, 2014Assignee: BAE Systems Imaging Solutions Inc.Inventors: Boyd Fowler, Xinqiao Liu
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Publication number: 20140191114Abstract: A proximity sensor may include an array of Geiger mode avalanche photodiodes, each including an anode contact and a cathode contact. A common cathode contact may be coupled to the cathode contacts of the array to define a first connection lead at a back side of the array. A common anode collecting grid contact may be coupled to the anode contacts of the array to define a second connection lead of the array. Circuitry may be coupled with the first and second connection leads and configured to sense at least one of a dark current and a rate of current spikes generated in dark conditions, and generate an output signal representing, an estimated distance of an object from the array upon the sensing.Type: ApplicationFiled: January 2, 2014Publication date: July 10, 2014Applicant: STMICROELECTRONICS S.r.I.Inventors: Alfio RUSSO, Massimo Cataldo MAZZILLO
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Patent number: 8772700Abstract: According to one embodiment, a photon detection system determines the number of detected photons. The detection system includes an avalanche photodiode and a measuring unit. The measuring unit measures an avalanche signal induced by illumination before the avalanche current through the device has saturated.Type: GrantFiled: July 2, 2010Date of Patent: July 8, 2014Assignee: Kabushiki Kaisha ToshibaInventors: Beata Ewa Kardynal, Zhiliang Yuan, Andrew James Shields
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Publication number: 20140183339Abstract: Exemplary embodiments are directed to shaping a readout pulse from a solid state photomultiplier (SSPM). A readout pulse can be received from the SSPM at an input of a buffer amplifier. The readout pulse can have a discharge portion with a discharge rate and a recharge portion with a recharge rate. A magnitude of the readout pulse increasing for the discharge portion and decreasing for the recharge portion. A frequency dependent input impedance circuit can be employed in electrical communication with the input of the buffer amplifier to shape the discharge portion of the readout pulse.Type: ApplicationFiled: December 28, 2012Publication date: July 3, 2014Applicant: GENERAL ELECTRIC COMPANYInventor: Sergei Ivanovich Dolinsky
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Publication number: 20140183337Abstract: The present invention relates to a multi-depth-of-field light-sensing device, a system, a depth of field extension method, and an optical imaging system. The multi-depth-of-field light-sensing device includes at least two light-sensing pixel layers capable of inducing a light source, where the at least two light-sensing pixel layers are arranged at an interval of a preset distance, so that different light signals from a lens at a specific distance from the light-sensing device are focused to the different light-sensing pixel layers. The multi-depth-of-field light-sensing device of the present invention can implement automatic focusing without using any electrically operated mechanism or complex and precise mechanical component, and have good depth of field extension performance.Type: ApplicationFiled: June 24, 2011Publication date: July 3, 2014Inventor: Xiaoping Hu
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Patent number: 8766161Abstract: A single photon detection system and method are disclosed which have a control block for helping to monitor and optimize performance, especially at high detection rates. The system is based on photon detectors constructed with avalanche photodiodes (APD) gated in time to operate in the Geiger mode. An electrical reference frequency is generated which is subtracted from the APD output in order to better isolate the breakdown event. The resulting signal is sampled and analyzed to allow the control unit to optimize the magnitude and phase of the electrical reference frequency. The control unit may also change the gate pulse shape and phase, including by the use of a digital-to-analog converter. The gate pulse can be shifted off an input optical pulse so as to estimate dark count rate, or shifted to measure a reference input signal to estimate detection efficiency.Type: GrantFiled: December 1, 2010Date of Patent: July 1, 2014Assignee: Nucript LLCInventor: Gregory S. Kanter
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Publication number: 20140175294Abstract: A photon detector (10) includes a detector array (12) comprising single photon avalanche diode (SPAD) detectors (14) configured to break down responsive to impingement of a photon. Trigger circuitry (34) is configured to generate a trigger signal responsive to break down of a SPAD detector of the detector array. Latches (20, 22) are configured to store position coordinates of SPAD detectors of the detector array that are in break down. The latches are configured to latch responsive to a trigger signal generated by the trigger circuitry. The latches may include row latches (22) each connecting with a logical “OR” combination of SPAD detectors of a corresponding row of the detector array, and column latches (20) each connecting with a logical “OR” combination of SPAD detectors of a corresponding column of the detector array. Time to digital converter (TDC) circuitry (28) may generate a digital time stamp for the trigger signal.Type: ApplicationFiled: July 27, 2012Publication date: June 26, 2014Applicant: KONINKLIJKE PHILIPS N.V.Inventor: Thomas Frach
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Publication number: 20140175266Abstract: A circuit board assembly includes a printed circuit board (PCB), at least two laser diodes, a number of first bonding wires, at least two photo diodes and a number of second bonding wires. The PCB includes a mounting surface, a first connecting pad, and a second connecting pad, both the first connecting pad and the second connecting pad are positioned on the mounting surface. The at least two laser diodes and the driving chip mounted on the first connecting pad. The first bonding wires each electrically connects the laser diodes to the driving chip. The photo diodes and the transimpedance amplifier mounted on the second connecting pad. The second bonding wires each electrically connects the photo diodes to the transimpedance amplifier.Type: ApplicationFiled: February 1, 2013Publication date: June 26, 2014Applicant: HON HAI PRECISION INDUSTRY CO., LTD.Inventor: KAI-WEN WU
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Patent number: 8760390Abstract: An interactive device for improving image processing. The interactive device includes a processing module and a controller. The processing module includes a substrate, an image sensor formed on the substrate for generating a plurality of pixel signals, a calculation unit formed on the substrate for calculating at least one motion vector based on the plurality of pixel signals, and a transmission interface formed on the substrate for serially outputting the motion vector. The controller is used for controlling operation of the interactive device based on the motion vector output by the transmission interface.Type: GrantFiled: March 19, 2010Date of Patent: June 24, 2014Assignee: PixArt Imaging Inc.Inventors: Hsuan-Hsien Lee, Chin-Hsin Yang, Tzu-Yi Chao
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Patent number: 8759785Abstract: A stacked-type detection apparatus including a plurality of pixels arranged at small intervals is configured to have low capacitance associated with signal lines and/or driving lines. With this novel configuration, small time constant and high-speed driving capability can be achieved in the signal lines and/or driving lines. The plurality of pixels in the detection apparatus are arranged in a row direction and a column direction on an insulating substrate. Each pixel includes a conversion element and a switch element, the conversion element is disposed above the switch element. A driving line disposed below the conversion elements is connected to switch elements arranged in the row direction, and a signal line is connected to switch elements arranged in the column direction. The signal line includes a conductive layer embedded in an insulating member, the insulating member is disposed in a layer lower than an uppermost surface portion of the driving line.Type: GrantFiled: August 1, 2011Date of Patent: June 24, 2014Assignee: Canon Kabushiki KaishaInventors: Takamasa Ishii, Chiori Mochizuki, Minoru Watanabe, Jun Kawanabe, Kentaro Fujiyoshi, Hiroshi Wayama
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Publication number: 20140166861Abstract: A single photon counting detector system has a layer of photosensitive material and an N×M array of photo-detector diodes. Each photo-detector diode has a bias potential interface and a diode output interface. The bias potential interface is connected to bias potential. An N×M array of high gain, low noise readout unit cells is provided, one readout unit cell for each photo-detector diode. Each readout unit cell has an input interface connected to the diode output interface, a high-gain voltage amplifier with an integration capacitor at least two parallel lines of digital counters, each having a comparator with an individually selectable threshold and a gateable section to determine the counting intervals of the digital counters. A multiplexer allows access to the readout cell unit either on a per pixel basis or for several pixels in parallel to read out the digital counter to a data processor transferring the data off chip.Type: ApplicationFiled: December 29, 2011Publication date: June 19, 2014Applicant: PAUL SCHERRER INSTITUTInventors: Bernd Schmitt, Anna Bergamaschi, Aldo Mozzanica, Roberto Dinapoli
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Publication number: 20140167619Abstract: Electronic devices may include light sensors. A light sensor may be an ambient light sensor that is mounted adjacent to an aperture in an opaque structure. An ambient light sensor may include active light sensor elements located adjacent to the aperture and inactive light sensor elements located adjacent to the opaque structure. Signal processing circuitry may be interposed between the light sensor elements and a summing circuit that sums light signals from the light sensor elements to form an ambient light signal. The signal processing circuitry may include a switch and an amplifier associated with each light sensor element. The switch associated with each element may be used to selectively activate or inactivate that element. The amplifier associated with each element may be used to amplify the light signal from that element by a gain factor that depends on the location of that element with respect to the aperture.Type: ApplicationFiled: December 17, 2012Publication date: June 19, 2014Applicant: Apple Inc.Inventors: Brian R. Land, Steven P. Hotelling
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Publication number: 20140166862Abstract: Methods and systems for enhancing the throughput of a metrology system generating measurement signals based on at least two different optical properties of the illumination light are presented. A detector having a two dimensional photosensitive area is subdivided into multiple photosensitive stripes by multiple, independent linear arrays of shift register elements located within the photosensitive area. Charge transfer from pixels within each stripe is directed to a distinct linear array of shift register elements. Each photosensitive stripe is able to resolve an optical property dispersed across the length of each stripe with relatively high resolution. In addition, the detector is able to resolve another optical property dispersed across several photosensitive stripes in a direction orthogonal to each linear array of shift registers at a relatively low resolution.Type: ApplicationFiled: December 11, 2013Publication date: June 19, 2014Inventor: Klaus Flock
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Patent number: 8754353Abstract: Disclosed herein is a solar cell system including: a plurality of power generation panels that differ in the range of wavelengths of light they absorb from each other and convert light into power; a voltage detection section adapted to detect the voltage of power generated by each of the plurality of power generation panels; a reproduction section adapted to compare the voltages of the plurality of power generation panels detected by the voltage detection section so as to reproduce an audio or music signal appropriate to the comparison result; and an output section adapted to output audio or music reproduced by the reproduction section.Type: GrantFiled: June 15, 2011Date of Patent: June 17, 2014Assignee: Sony CorporationInventors: Yoshiaki Inoue, Jusuke Shimura
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Patent number: 8749774Abstract: Provided are an integrating sphere photometer and a measuring method of the same. The integrating sphere photometer includes a plurality of photodetectors, an integrating sphere having through-holes formed to correspond to the photodetectors, baffles disposed inside the integrating sphere in front of the photodetectors to be spaced apart from the photodetectors, a photometer disposed at a through-hole, and an adjustment unit adjusting output signals of the photodetectors to have the same output signal with respect to light illuminated from a point-like standard light source disposed at a center region in the integrating sphere.Type: GrantFiled: July 18, 2011Date of Patent: June 10, 2014Assignee: Korea Research Institute of Standards and ScienceInventors: Seongchong Park, Dong Hoon Lee, Seung Nam Park
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Patent number: 8748803Abstract: A portable electronic device, for example an electronic card, includes at least one electronic unit associated to an optical switch which can be actuated by a user and which includes two photo-detectors arranged sufficiently far from each other in the electronic device to enable the user to cover only one of the two photo-detectors with one finger. The switch includes a logical circuit to which are provided a first and a second light reception signal respectively coming from the two photo-detectors. The logical circuit is arranged to supply a signal which only indicates actuation of the optical switch when the first and second light reception signals correspond to two different logical states for the logic circuit.Type: GrantFiled: December 10, 2009Date of Patent: June 10, 2014Assignee: NagraID Security S.A.Inventors: Philippe Guillaud, Cyril Lalo
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Publication number: 20140152632Abstract: An electronic device is provided with a display and a solar cell ambient light sensor that receives light through a portion of the display. The solar cell ambient light sensor may include one or more thin-film photovoltaic cells. A voltage that accumulates within the thin-film photovoltaic cell in response to ambient light is sampled and converted into ambient light data. The device includes control circuitry that modifies the intensity of display light generated by the display based on the ambient light data from the photovoltaic cell. The solar cell ambient light sensor is attached to a transparent cover layer, a color filter layer, or any other layer of the display. When the accumulated voltage is not being sampled for ambient light measurements, the voltage may be used to provide charge to a battery in the device.Type: ApplicationFiled: December 4, 2012Publication date: June 5, 2014Applicant: Apple Inc.Inventors: Anna-Katrina Shedletsky, Erik G. de Jong, Fletcher R. Rothkopf, Anthony S. Montevirgen
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Patent number: 8742312Abstract: A planar detector for use in light curtains, which generates electric signals as a function of absorbed light and is provided with a plurality of tapping points for the generated signals. The magnitude of the signals at the respective tapping points is dependent on their distance to the partial surfaces where the light is absorbed. As a function of the magnitude ratios between the signals at several tapping points, the distance ratios of the respective tapping points to those partial surfaces, where the light is absorbed, can be calculated. The detector is configured as a flexible layered structure made of organic material. The tapping points are disposed at a distance from the edges of the layered structure. Electric connection lines to the tapping points are connected along their longitudinal extension to the layered structure of the detector.Type: GrantFiled: April 15, 2010Date of Patent: June 3, 2014Assignee: Isiqiri Interface Technologies GmbHInventor: Richard Ebner
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Patent number: 8736818Abstract: Methods and systems for adaptively controlling the illumination of a scene are provided. In particular, a scene is illuminated, and light reflected from the scene is detected. Information regarding levels of light intensity received by different pixels of a multiple pixel detector, corresponding to different areas within a scene, and/or information regarding a range to an area within a scene, is received. That information is then used as a feedback signal to control levels of illumination within the scene. More particularly, different areas of the scene can be provided with different levels of illumination in response to the feedback signal.Type: GrantFiled: August 16, 2010Date of Patent: May 27, 2014Assignee: Ball Aerospace & Technologies Corp.Inventors: Carl S. Weimer, Tanya M. Ramond, Carl M. Adkins, Jeff T. Applegate, Thomas P. Delker, Lyle S. Ruppert
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Patent number: 8729516Abstract: A method detects metallic atoms in a fluid. The method includes: placing, in a zone sheltered from light, a photodiode comprising a photosensitive surface in contact with a fluid to analyze; heating the photosensitive surface of the photodiode to a temperature sufficient to allow metallic atoms deposited on the photosensitive surface to migrate through this surface; acquiring a signal relative to the lighting of the photodiode; and determining, from the acquired signal, a measurement representative of a contamination status by metallic atoms of the photodiode.Type: GrantFiled: October 3, 2011Date of Patent: May 20, 2014Assignee: STMicroelectronics (Rousset) SASInventor: Yannick Marietti
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Publication number: 20140131555Abstract: In a sensor system including a plurality of photoelectric sensor units, a light projecting period arbitrarily determined in each type is provided and mutual interference is prevented between identical types. The sensor system includes the plurality of sensor units coupled by a connector unit while a signal can be transmitted. Each of the sensor units retains type information thereof, and sets a unique identification number by transmitting the signal to each other. Each sensor unit operates after a delay time determined according to the identification number thereof elapses with a synchronous signal as a starting point. The synchronous signal is transmitted with a predetermined period from the sensor unit having a specific identification number in the plurality of sensor units. The delay time of each sensor unit is determined such that an operating period is matched with a predetermined period determined in each piece of the type information.Type: ApplicationFiled: October 11, 2013Publication date: May 15, 2014Applicant: OMRON CORPORATIONInventors: Yusuke IIDA, Koji IGUCHI, Hideyuki Kishiba, Kiyohiko GONDO
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Publication number: 20140131557Abstract: A method of and apparatus for, detecting an intrusion into a volume defined relative to a path across an opening along which path a closure member for the opening can be controllably displaced to define a gap in the opening, the gap being bounded on one side by the closure member and on the other side to the one side by a boundary member; the volume including at least one threshold region on at least one side of the path; the volume having as a base the threshold region and rising above the threshold region; a first group of at least two emitters of electromagnetic signals located on either the closure member or the boundary and directed into the volume and a second group of at least two receivers for electromagnetic signals located on the opposite side of the gap to the emitters; emissions from the emitters being directed into the volume but not directly towards the receivers; the emitters and receivers forming part of a network including processing means which form a compound sensor for use in monitoring opType: ApplicationFiled: September 3, 2012Publication date: May 15, 2014Applicant: Airdri LimitedInventor: Peter Collins
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Publication number: 20140131556Abstract: An embodiment is an imaging apparatus including a plurality of unit cells. The imaging apparatus includes a first conductive member electrically connected to gates of the plurality of first transfer transistors, a second conductive member electrically connected to gates of the plurality of second transfer transistors, a third conductive member disposed adjacently to the first conductive member in a same wiring layer as the first conductive member and electrically connected to a plurality of nodes each included in respective one of the plurality of unit cells, and a fourth conductive member disposed adjacently to the second conductive member in a same wiring layer as the second conductive member. An opposing length of the first conductive member and the third conductive member is longer than an opposing length of the second conductive member and the fourth conductive member.Type: ApplicationFiled: November 8, 2013Publication date: May 15, 2014Inventors: Kotaro Abukawa, Itsutaku Sano
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Publication number: 20140124656Abstract: A light detecting method is provided. The light detecting method includes following steps. A light beam is sensed to generate a photocurrent. A predetermined current is subtracted from the photocurrent. The photocurrent is converted to a voltage.Type: ApplicationFiled: January 9, 2014Publication date: May 8, 2014Applicant: Himax Display, Inc.Inventors: Wei-Ting Lan, Cheng-Chi Yen, Ju-Tien Cheng
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Publication number: 20140124647Abstract: There is provided a method of reducing power consumption of a gesture sensor. The method utilizes an auxiliary sensing device to detect whether an object exists in a sensing covering range of the gesture sensor, thereby determining operating states and power consumptions of the gesture sensor and the auxiliary sensing device. If the auxiliary sensing device does not detect that the object exists in the sensing covering range of the gesture sensor or the object moves, the gesture sensor is allowed to be in a low power consumption operating state, thereby reducing the power consumption.Type: ApplicationFiled: October 17, 2013Publication date: May 8, 2014Applicant: PixArt Imaging Inc.Inventor: En-Feng Hsu
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Patent number: 8716647Abstract: An analog silicon photomultiplier system includes at least one analog pixel comprising a plurality of analog photodiodes (APDs), and a capacitor, a signal generator, a phase detector, and a compensation network. The signal generator is configured to generate and propagate a sinusoidal signal concurrently along first and second transmission lines. A capacitor is loaded on the first transmission line when an APD corresponding to the capacitor detects a photon. The phase detector is coupled with the first and second transmission lines, determines a phase difference between the first transmission line and the second transmission line and calculates a number of APDs that have fired from the phase difference. The compensation network is coupled with the second transmission line and the phase detector, and comprises a plurality of compensation capacitors, wherein the compensation capacitors are loaded on the second transmission line in proportion to the number of APDs that have fired.Type: GrantFiled: November 6, 2009Date of Patent: May 6, 2014Assignee: NXP, B.V.Inventors: Padraig O'Mathuna, Yong Luo
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Patent number: 8716648Abstract: According to one embodiment, a photon detection system determines the number of detected photons. The detection system includes an avalanche photodiode and a measuring unit. The measuring unit measures an avalanche signal induced by illumination before the avalanche current through the device has saturated.Type: GrantFiled: March 14, 2012Date of Patent: May 6, 2014Assignee: Kabushiki Kaisha ToshibaInventors: Beata Ewa Kardynal, Zhiliang Yuan, Andrew James Shields
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Patent number: 8716644Abstract: The invention provides a glare reduction apparatus disposed in an object illuminated by a light source. The glare reduction device includes an electro-optical device covering a surface of the object. A light sensing device is disposed on a first fixed point of the object. A controller is electrically coupled to the electro-optical device and the light sensing device, wherein the controller calculates a corresponding light sensing position of the electro-optical device according to a light sensing position of the light sensing device which directly receives light from the light source, to reduce the light transmittivity of the corresponding light sensing position of the electro-optical device to generate a light shielding region. The light shielding region attenuates the light from the light source to a second fixed point of the object.Type: GrantFiled: July 9, 2010Date of Patent: May 6, 2014Assignee: Industrial Technology Research InstituteInventors: E-In Wu, Tai-Chang Wu
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Publication number: 20140117212Abstract: A semiconductor device that includes: a first trans-impedance amplifier that converts a first current signal generated by a first photodiode, into which an optical signal is input, into a first voltage signal; a second trans-impedance amplifier that converts a second current signal generated by a second photodiode, to which an optical signal is blocked, into a second voltage signal; a peak hold circuit that holds the peak value of the first voltage signal; a comparator that outputs a pulse on the basis of the first and second voltage signals; and a threshold current setting circuit that draws out a threshold current, which is proportional to a reference current generated on the basis of a voltage difference between a peak voltage output by the peak hold circuit and a reference voltage at the output node of the second photodiode, from the connection between the second photodiode and the second trans-impedance amplifier.Type: ApplicationFiled: October 25, 2013Publication date: May 1, 2014Applicant: Renesas Electronics CorporationInventors: Hitoshi IMAI, Hirotatsu Tanaka
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Publication number: 20140103196Abstract: There is provided a light detector having a light-receiving unit including a light-receiving element of a photon-counting type that receives incident light and outputs a binary pulse indicating presence or absence of photon incidence, and an integrating unit that calculates an output value in which a total of pulse widths of pulses is integrated over a measurement period.Type: ApplicationFiled: October 15, 2013Publication date: April 17, 2014Applicant: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHOInventors: Mineki SOGA, Cristiano NICLASS
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Publication number: 20140103194Abstract: There is disclosed a sensing device (100) adapted to receive light emitted from a plurality of light sources (A, B), each of the plurality of light sources (A, B) emitting light comprising a light source identifier. The sensing device (100) comprises a sensing module (110) comprising a light selection unit (114) configured to receive at least a portion of the light emitted from the plurality of light sources (A, B) and a light selection unit (114) configured to receive at least a portion of the light emitted from the plurality of light sources (A, B). The light selection unit (114) is adapted to selectively convey a selected portion of light received by the light selection unit (114) to a second photo sensor unit (116). The light selection unit (114) is arranged relatively to the first photo sensor unit (112), or vice versa, in such a way that the selected portion of light is associated with a photo sensor of a plurality of photo sensors of the first photo sensor unit (114) detecting light.Type: ApplicationFiled: May 28, 2012Publication date: April 17, 2014Applicant: KONINKLIJKE PHILIPS N.V.Inventors: Frederik Jan De Bruijn, Arnoldus Antonius de Beijer, Lorenzo Feri, Chris Damkat, Remco Theodorus Johannes Muijs, Jelte Peter Vink
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Patent number: 8698096Abstract: Nano-antennas with a resonant frequency in the optical or near infrared region of the electromagnetic spectrum and methods of making the nano-antennas are described. The nano-antenna includes a porous membrane, a plurality of nanowires disposed in the porous membrane, and a monolayer of nanospheres each having a diameter that is substantially the same as a diameter of the nanowires. The nanospheres are electrically in series with the nanowires.Type: GrantFiled: August 16, 2012Date of Patent: April 15, 2014Assignee: Empire Technology Development LLCInventor: Christopher J. Rothfuss
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Publication number: 20140091206Abstract: A proximity detector may include an array of single photon avalanche diodes (SPADs) and an illumination source. Illumination from the illumination source may be reflected by a target to the array of single photon avalanche diodes. The SPADs may be operable to detect events. A number of events detected may be dependent on a level of illumination incident on the SPADs. The proximity detector may then determine a quality metric and calculate an output when the quality metric is at a predetermined level. A related method may include regulating the quality of the data on which such a proximity detector apparatus calculates its output.Type: ApplicationFiled: December 9, 2013Publication date: April 3, 2014Inventor: DAVID PATRICK BAXTER
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Publication number: 20140091226Abstract: A photosensor testing apparatus can be used to test photosensors. A light module can produce simulating light that corresponds to scintillating light of a scintillator or a derivative of the scintillating light. A photosensor under test can produce an output that can be analyzed. A particular photosensor can be determined to have a higher quantum efficiency, a higher signal-to-noise ratio, or another performance criterion and selected for use in a radiation detection apparatus having the scintillator that can produce the scintillating light. The photosensor testing apparatus can provide a more accurate way of selecting a photosensor as compared to only analyzing an emission spectrum and data sheets and other information for the photosensors under consideration.Type: ApplicationFiled: September 26, 2013Publication date: April 3, 2014Inventors: Artan Duraj, John M. Frank
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Publication number: 20140085265Abstract: A directional light sensor may be provided having an array of beam steering elements and an array of corresponding light sensors. Each beam steering element may be configured to direct light from a given angle onto a particular light sensor so that the angular distribution of light may be mapped onto a planar grid of light sensors. Each beam steering element may be formed using holographic, refractive, diffusive or other structures for redirecting a beam of light. An electronic device may be provided having a directional light sensor. The directional light sensor in the electronic device may provide ambient light data or user input data to the electronic device. A test system may be provided having a directional light sensor for gathering ambient light data during testing and manufacturing of an electronic device.Type: ApplicationFiled: September 27, 2012Publication date: March 27, 2014Applicant: Apple Inc.Inventor: Ye Yin
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Publication number: 20140077070Abstract: The invention relates to a unit (1) for determining the dominant light source type in electromagnetic radiation (2) incident on the unit (1) and generated from a plurality of light sources of different types. The unit comprises at least one first photodiode (10) designed to detect electromagnetic radiation in the visible spectral range and to generate a first output signal (11). The unit comprises at least one second photodiode (20) designed to detect electromagnetic radiation in the infrared spectral range and to generate a second output signal (21). The unit comprises at least one calculation unit (30) designed to derive a quotient result (23) and a frequency result (13) from the first (11) and second (21) output signals. The frequency result (13) provides information about the presence or absence of signal components in a predetermined frequency range contained in the electromagnetic radiation.Type: ApplicationFiled: March 29, 2011Publication date: March 20, 2014Applicant: OSRAM OPTO SEMICONDUCTORS GMBHInventor: Christian Müller
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Publication number: 20140061440Abstract: The invention provides an ambient light sensing device and an ambient light sensing method. The ambient light sensing device includes at least one pixel, a read out circuit, and a combination unit. The invention detects ambient light to obtain plural lower resolution exposure values corresponding to different dynamic ranges respectively, and combines the plural lower resolution exposure values to generate a higher resolution code combination, indicating the result of ambient light detection.Type: ApplicationFiled: April 15, 2013Publication date: March 6, 2014Applicant: PIXART IMAGING INCORPORATIONInventors: En-Feng Hsu, Meng-Huan Hsien
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Publication number: 20140054461Abstract: A light detector includes a first light sensor and a second light sensor to detect incident light. A Ge film is disposed over the first light sensor to pass infra-red (IR) wavelength light and to block visible wavelength light. The Ge film does not cover the second light sensor.Type: ApplicationFiled: August 27, 2012Publication date: February 27, 2014Applicant: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.Inventors: Alexander Kalnitsky, Chia-Hua Chu, Fei-Lung Lai, Chun-Wen Cheng, Chun-Ren Cheng, Yi-Hsien Chang
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Publication number: 20140049783Abstract: The invention relates to a system (21) for receiving a light beam, comprising an array of light sensors (26). The system also comprises a pixelated light switch array (24), in which each switch is adapted to receive at least one portion of the light beam and direct it to the array of light sensors (26), and the pixelated light switch array (24) comprises a higher number of switches than the number of light sensors comprised in the array of light sensors (26).Type: ApplicationFiled: March 15, 2012Publication date: February 20, 2014Applicant: UNIVERSITAT POLITÈCNICA DE CATALUNYAInventors: Santiago Royo Royo, Jordi Riu Gras
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Publication number: 20140048692Abstract: The present disclosure relates to a multi-channel detector having a reduced number of output channels and including: a linear amplifier linearly amplifying an input signal; an offset correcting unit configured by a circuit that is independent from the linear amplifier, including an operational amplifier inside, and correcting an offset level that changes in accordance with an amplification rate of the operational amplifier; a uniformity correcting unit reducing a non-uniform characteristic of the input signal by finely adjusting a gain of an output signal of the linear amplifier; a signal delay unit delaying an output signal of the uniformity correcting unit until a time point when output signals are generated from a comparison unit and a signal determining unit, and a switch circuit receives a trigger from the signal determining unit; a comparison unit comparing the output signal of the uniformity correcting unit with a signal of a predetermined level with each other; a signal determining unit receiving a trType: ApplicationFiled: October 25, 2011Publication date: February 20, 2014Applicant: Industry-University Cooperation Foundation Sogang UniversityInventors: Jihoon Kang, Yong Choi, Jin Ho Jung
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Patent number: 8653432Abstract: Coherent optical signal processing is performed in a coherent receiver (or diagnostic/testing apparatus) that converts an amplitude and/or angle-modulated optical signal into two electrical signals. A simple receiver can only detect one phase of the signal and only the polarization that is aligned with a local oscillator laser polarization. To detect both phases and both polarizations, two sets of two interferometers, one each with a ?/2 phase shift are required. Coherent optical signal processing methods, apparatus, techniques, etc. are disclosed that include individual components comprising a polarization combiner, a Savart device and photodetection apparatus with substantially reduced temperature and alignment sensitivity operating in optical communication systems and/or subsystems. The various embodiments can be used alone or in such combinations to provide improved coherent optical signal processing in a receiver.Type: GrantFiled: March 8, 2012Date of Patent: February 18, 2014Assignee: Tektronix, Inc.Inventor: Robert A. Marsland, Jr.
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Patent number: 8653436Abstract: A pinned photodiode structure with peninsula-shaped transfer gate which decrease the occurrence of a potential barrier between the photodiode and the floating drain, prevents loss of full well capacity (FWC) and decreases occurrences of image lag.Type: GrantFiled: December 17, 2009Date of Patent: February 18, 2014Assignee: OmniVision Technologies, Inc.Inventor: Hisanori Ihara
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Patent number: 8642940Abstract: A display device in which light leakage in a monitor element portion is prevented without increasing the number of steps and cost is provided. The display device includes a monitor element for suppressing influence on a light-emitting element due to temperature change and change over time and a TFT for driving the monitor element, in which the TFT for driving the monitor element is provided so as not to overlap the monitor element. Furthermore, the display device includes a first light shielding film and a second light shielding film, in which the first light shielding film is provided so as to overlap a first electrode of the monitor element and the second light shielding film is electrically connect to the first light shielding film through a contact hole formed in an interlayer insulating film. The contact hole is formed so as to surround the outer edge of the first electrode of the monitor element.Type: GrantFiled: June 17, 2013Date of Patent: February 4, 2014Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Yasuyuki Takahashi, Mizuki Sato
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Patent number: 8642942Abstract: A configurable photo detector circuit comprises a photo detector array including a plurality of photo detectors coupled to a plurality of amplifiers. A method for programming a detection pattern of the configurable photo detector circuit comprises selecting a first detection pattern for the photo detector array, generating first signals to create the first selected detection pattern, and applying the first generated signals to the photo detector circuit to implement the first selected detection pattern.Type: GrantFiled: March 27, 2013Date of Patent: February 4, 2014Assignee: Intersil Americas Inc.Inventors: Dong Zheng, Daryl Chamberlain
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Publication number: 20140027621Abstract: A photoelectric conversion device in which a parasitic capacitance between an optical signal common output line for commonly transmitting an optical signal and a control signal line and a parasitic capacitance between an initial voltage common output line for commonly transmitting an initial voltage and the control signal line in a plurality of photoelectric conversion units are substantially equal is provided. The control signal line is arranged so that the length of the wiring part of the control signal line in parallel with the optical signal common output line and the length of the wiring part of the control signal line in parallel with the initial voltage common output line are substantially equal and the distance between the control signal line and the optical signal common output line and the distance between the control signal line and the initial voltage common output line are substantially equal.Type: ApplicationFiled: July 25, 2013Publication date: January 30, 2014Applicant: Seiko Instruments Inc.Inventor: Masahiro YOKOMICHI