Accumulation Or Integration Time Responsive To Light Or Signal Intensity Patents (Class 348/297)
  • Publication number: 20140078361
    Abstract: The present invention relates to improved imaging devices having high dynamic range and to monitoring and automatic control systems incorporating the improved imaging devices.
    Type: Application
    Filed: November 18, 2013
    Publication date: March 20, 2014
    Applicant: Gentex Corporation
    Inventors: Jon H. Bechtel, Jeremy C. Andrus
  • Patent number: 8670042
    Abstract: A blinking-signal device 1 includes a light receiving section 10, a row selecting section 20, a readout section 30, a detecting section 40, and a control section 50. By the row selecting section 20, charge generated in its photodiode of each pixel unit P2i-1,n of the (2i?1)-th row in the light receiving section 10 is accumulated in its charge accumulating section during a first period, and charge generated in its photodiode of each pixel unit P2i,n of the 2i-th row in the light receiving section 10 is accumulated in its charge accumulating section during a second period. With the detecting section 40, it is detected whether or not light reaching the pixel units P2i-1,n and P2i,n is a blinking signal on the basis of a difference between data D2i-1,n and D2i,n of the pixel units P2i-1,n and P2i output from the readout section 30.
    Type: Grant
    Filed: July 20, 2010
    Date of Patent: March 11, 2014
    Assignee: Hamamatsu Photonics K.K.
    Inventors: Tasuku Joboji, Yukinobu Sugiyama
  • Patent number: 8670044
    Abstract: A photometric device includes a storage-type photometric sensor, a first control means that performs accumulation control on the photometric sensor based upon an average value of an output of the photometric sensor, a second control means that performs accumulation control on the photometric sensor based upon a maximum value of the output of the photometric sensor, and an accumulation control means that controls the second control means to perform next accumulation control, if the maximum value of the output of the photometric sensor on which the accumulation control is performed by the first control means exceeds a saturation output level of the photometric sensor, and controls the first control means to perform next accumulation control, if the maximum value of the output of the photometric sensor does not exceed the saturation output level of the photometric sensor.
    Type: Grant
    Filed: June 16, 2011
    Date of Patent: March 11, 2014
    Assignee: Nikon Corporation
    Inventor: Hiroshi Takeuchi
  • Publication number: 20140043509
    Abstract: A solid-state image pickup device including a pixel section arranged with multiple pixel circuits in A matrix having functions for converting an optical signal to an electrical signal and for accumulating the electrical signal depending on an exposure time, and a pixel driving section capable of driving through a control line to reset, accumulate, transfer, and output signal electric charge of the pixel section. The pixel section may have a pixel shared structure arranged with one selection control line, one reset control line, and multiple transfer control lines, including a readout-pixel section and an unread-pixel section in its entirety. The pixel driving section includes a pixel control section where an unread-pixel is normally fixed in a reset state. When reading a readout-pixel in a shared relationship, if its address is selected or a selection signal becomes active, the unread-pixel reset-state is cancelled to turn into an unread state.
    Type: Application
    Filed: October 15, 2013
    Publication date: February 13, 2014
    Applicant: Sony Corporation
    Inventors: Hiroki Ui, Tomohiro Takahashi, Hirofumi Kikutsugi
  • Patent number: 8643752
    Abstract: A method and system is disclosed for reducing motion blur using CCD charge shifting. In one embodiment, photodiode wells are exposed for a set of successive exposures with each exposure duration being a fraction of a total exposure time. After each successive exposure, the photodiode wells integrate signal charges and shift them to corresponding storage lines. The shifted signal charges are then shifted along the storage lines for a specified number of storage units. At the same time, the CCD is moved in the direction of a leading edge of the CCD. The photodiode wells are then exposed for another exposure to produce another set of signal charges, which are shifted to the storage lines. Signal charges from the successive exposures are accumulated at the storage lines. After all successive exposures have been taken, the accumulated signal charges are shifted to a serial shift register and output to form an image.
    Type: Grant
    Filed: April 25, 2012
    Date of Patent: February 4, 2014
    Assignee: Google Inc.
    Inventor: Iain Richard Tyrone McClatchie
  • Patent number: 8643718
    Abstract: An image measuring apparatus includes: a light source; an imaging device; and a controller configured to adjust a light emission amount of the light source based on a light reception amount of the imaging device, wherein: when a light reception amount of the light receiving element is more than a maximum value, the controller reduces a light amount of the light source in next light reception; when the light reception amount of the light receiving element is less than the maximum value, the controller increases the light amount of the light source in the next light reception; and when the light amount of the light source reaches the maximum light amount and the light reception amount is smaller than a minimum value, the controller makes the light amount of the light source in the next light reception a minimum light amount.
    Type: Grant
    Filed: October 20, 2011
    Date of Patent: February 4, 2014
    Assignee: Mitutoyo Corporation
    Inventors: Masaoki Yamagata, Kentaro Nemoto
  • Publication number: 20140028883
    Abstract: A depth sensing apparatus and method for acquiring a depth image of a target object may calculate a difference voltage between a first floating diffusion node and a second floating diffusion node, based on a voltage of a photodiode stored in the first floating diffusion node in a first phase interval and a voltage of the photodiode stored in the second floating diffusion node in a second phase interval, using a sub-integration period, may feed back the difference voltage to one of the first floating diffusion node and the second floating diffusion node, and may calculate a depth value of a pixel based on difference voltages accumulated during an integration period including sub-integration periods.
    Type: Application
    Filed: July 24, 2013
    Publication date: January 30, 2014
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jung Soon Shin, Seong Jin Kim
  • Publication number: 20140028884
    Abstract: A method and apparatus are disclosed for forming an image signal by receiving a flux of photons at a convex photodetector such as a hemispherical photodetector. The convex photodetector includes a plurality of photosensors. Each photosensor has a different orientation with respect to a propagation vector of the flux of photons. The photosensors generate a respective plurality of intensity signals. Each of the intensity signals is related to the respective orientation of the photosensor that generates it. The intensity signals are received by a signal processor, such as a digital signal processor, which uses the intensity signals to compute an image signal related to the intensity signals and thereby produce a focused output image.
    Type: Application
    Filed: September 9, 2013
    Publication date: January 30, 2014
    Inventor: Allan J. COOPER
  • Patent number: 8638374
    Abstract: This invention provides an image pickup apparatus that performs an image pickup operation that alternately repeats a long exposure LE and a short exposure SE. The image pickup apparatus drives an image pickup device in a first driving mode that makes a first time interval between an exposure end time of a pixel in an SE and an exposure start time of the pixel in an LE immediately thereafter and a second time interval between the exposure end time of the pixel in the LE and the exposure start time of the pixel in the SE immediately thereafter equal.
    Type: Grant
    Filed: March 23, 2011
    Date of Patent: January 28, 2014
    Assignee: Olympus Imaging Corp.
    Inventors: Kazuhiro Haneda, Makoto Ikeda
  • Patent number: 8629926
    Abstract: There is set forth herein in one embodiment an image sensor array including a global shutter shared by first and second pixels. The global shutter can include a charge storage area having an associated shield for reducing charge build up on the charge storage area attributable to incident light rays. There is set forth herein in one embodiment an imaging apparatus having one or more configuration. The one or more configuration can include one or more of a configuration wherein a frame read out from an image sensor array has unbinned pixel values, a configuration wherein a frame read out from an image sensor array has binned pixel values corresponding to an M×N, M>=2, N>=2 arrangement of pixel values, and a configuration wherein a frame read out from an image sensor array has binned pixel values corresponding to a 1×N, N>=2 arrangement of pixel values.
    Type: Grant
    Filed: November 4, 2011
    Date of Patent: January 14, 2014
    Assignee: Honeywell International, Inc.
    Inventor: Ynjiun Paul Wang
  • Publication number: 20140009654
    Abstract: An anti-eclipse circuit for an imaging sensor monitors the photo signal level output by a pixel to determine whether the photo signal corresponds to the pixel being operated at a saturated state. If so, there is a risk that the pixel may be susceptible to an eclipse distortion. When the pixel is detected as being operated in a saturated state, the anti-eclipse circuit pulls up the reset signal level previously stored in a sample and hold circuit to an appropriate voltage level in order to prevent an eclipse distortion from arising.
    Type: Application
    Filed: September 9, 2013
    Publication date: January 9, 2014
    Applicant: MICRON TECHNOLOGY, INC.
    Inventors: Jeffrey Rysinski, Sanjayan Vinayagamoorthy
  • Publication number: 20140009653
    Abstract: An imaging device includes: a pixel array section having an array of pixels, each of which has a photoelectric converting device and outputs an electric signal according to an input photon; a sense circuit section having a plurality of sensor circuits each of which makes binary decision on whether there is a photon input to a pixel in a predetermined period upon reception of the electric signal therefrom; and a decision result IC section which integrates decision results from the sense circuits, pixel by pixel or for each group of pixels, multiple times to generate imaged data with a gradation, the decision result IC section including a count circuit which performs a count process to integrate the decision results from the sense circuits, and a memory for storing a counting result for each pixel from the count circuit, the sense circuits sharing the count circuit for integrating the decision results.
    Type: Application
    Filed: June 28, 2013
    Publication date: January 9, 2014
    Inventor: Toshiyuki NISHIHARA
  • Patent number: 8625012
    Abstract: Described herein is a circuit and related method for improving the dynamic range and the linearity characteristic of a CMOS image sensor. In various embodiments of the CMOS image sensor, a current sampler, a comparator, and a 1-bit memory are incorporated in each pixel circuit. In the image sensor, pixels are arranged in columns and a column slice is used to read the digital and analog singles from each column. In addition, a calibration circuit is incorporated in the sensor circuit for providing calibration current, which is used to generate calibration parameter. The image sensor operates in three non-overlapping modes: the difference mode, the WDR mode, and the calibration mode. The image sensor is switched among the three modes by control signals, which are provided to the image sensor by various control circuits. The image sensor normally operates in the difference mode and switches to the WDR mode when the difference between consecutive frames is over a threshold.
    Type: Grant
    Filed: January 29, 2010
    Date of Patent: January 7, 2014
    Assignee: The Hong Kong University of Science and Technology
    Inventors: Jie Yuan, Ho Yeung Chan
  • Patent number: 8624997
    Abstract: An image sensor includes an array of light sensitive elements and a filter array. Each filter element is in optical communication with a respective light sensitive element. The image sensor receives filtered light having a repeating pattern. Light sensitive elements in at least two successive rows alternately receive light having a first color and a second color, and light sensitive elements in common columns of the successive rows alternately receive light having the first color and the second color. Light sensitive elements in at least two additional successive rows alternately receive light having a third and a fourth color, and light sensitive elements in common columns of the additional successive rows alternately receive light having the third color and the fourth color. Output values of pairs of sampled light sensitive elements receiving light of a common color and from successive rows are combined to generate a down-sampled image.
    Type: Grant
    Filed: February 25, 2011
    Date of Patent: January 7, 2014
    Assignee: OmniVision Technologies, Inc.
    Inventors: Jiangtao Kuang, Donghui Wu, Jizhang Shan
  • Patent number: 8625010
    Abstract: A solid-state imaging apparatus including a plurality of pixels each including: a first holding portion for holding signal carriers from a photoelectric conversion portion; an amplifying portion for amplifying and reading a signal based on the signal carriers generated in the photoelectric conversion portion; and a carrier discharging control portion for discharging charge carriers in the photoelectric conversion portion to an OFD region, and having a carrier path between the photoelectric conversion portion and the first carrier holding portion, in which the solid-state imaging apparatus further includes a second carrier holding portion electrically connected with the first carrier portion in parallel through a first transfer unit, when viewed from an output node of the photoelectric conversion portion, thereby smoothing an movie imaging without causing discontinuous frame while suppressing generation of noise mixing into the charge carrier holding portion.
    Type: Grant
    Filed: April 30, 2009
    Date of Patent: January 7, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yuichiro Yamashita, Masahiro Kobayashi, Takanori Watanabe, Shinsuke Kojima, Takeshi Ichikawa, Yusuke Onuki
  • Patent number: 8618492
    Abstract: A radiation image pickup device includes: an image pickup section having a plurality of pixels and generating an electric signal according to incident radiation, the plurality of pixels each including a photoelectric conversion element and one or a plurality of transistors of a predetermined amplifier circuit; and a correction section subjecting signal data of the electric signal obtained in the image pickup section to predetermined correction process. The correction section makes a comparison between measurement data obtained by measuring an input-output characteristic of the amplifier circuit in each of the plurality of pixels and initial data on the input-output characteristic, and performs the correction process by the pixel individually, by using a result of the comparison.
    Type: Grant
    Filed: July 28, 2011
    Date of Patent: December 31, 2013
    Assignee: Sony Corporation
    Inventors: Michiru Senda, Tsutomu Tanaka, Tsutomu Harada
  • Publication number: 20130342744
    Abstract: A solid-state imaging device includes: a photoelectric conversion section configured to perform photoelectric conversion on incident light, and to store obtained photoelectric charge; a voltage conversion section configured to convert the photoelectric charge transferred from the photoelectric conversion section into a voltage signal; a first gate section configured to transfer the photoelectric charge stored in the photoelectric conversion section to the voltage conversion section; a second gate section configured to reset a potential of the voltage conversion section; a third gate section configured to directly reset the photoelectric charge stored in the photoelectric conversion section; and a control section configured to control driving of the first to the third gate sections, wherein the control section controls driving of the third gate section so as to adjust an exposure time of the photoelectric conversion section.
    Type: Application
    Filed: May 28, 2013
    Publication date: December 26, 2013
    Applicant: SONY CORPORATION
    Inventors: Haruhisa Naganokawa, Kenya Kondou, Kandai Fukuyama
  • Patent number: 8614758
    Abstract: A solid-state imaging device including: a substrate; a substrate voltage supply that applies a first potential to the substrate during a light receiving period and applies a second potential to the substrate during a no-light receiving period; and a plurality of pixels including a light receiving portion that generates signal charges in response to received light, a storage capacitor that stores and holds the signal charges, a dark current suppressing portion, an electronic shutter adjusting layer that adjusts potential distribution in a substrate so that the signal charges are swept to the rear surface side of the substrate, a readout gate portion that reads out the signal charges stored in the storage capacitor, and a vertical transfer register that transfers the signal charges read out by the readout gate portion in a vertical direction.
    Type: Grant
    Filed: January 28, 2010
    Date of Patent: December 24, 2013
    Assignee: Sony Corporation
    Inventor: Hideo Kanbe
  • Patent number: 8605202
    Abstract: A camera and system comprising a camera in which, during exposure, the ratio of the distance between the lens and the sensor and the focal length is changed. The rate of change is set such that motion invariant imaging is achievable for practical speed ranges, i.e. speed of up to at least 5 km/hour at 2 meter distance of the lens, by deconvoluting the compound image. Preferably the achievable speed range is at least twice as high. A linear motion of the sensor is preferred.
    Type: Grant
    Filed: April 28, 2010
    Date of Patent: December 10, 2013
    Assignee: Koninklijke Philips N.V.
    Inventors: Remco Theodorus Johannes Muijs, Dmitry Nikolaevich Znamenskiy, Harold Agnes Wilhelmus Schmeitz, Ruud Vlutters, Franciscus Hendrikus Van Heesch
  • Patent number: 8598901
    Abstract: A system includes: a plurality of pixels arranged in a matrix; a reference signal generating unit for generating a ramp signal; A/D converters each arranged correspondingly to each of columns to A/D-convert a signal from the pixel; a counter that performs a count operation according to an output of the ramp signal, and supplies the count signal through the count signal line to the A/D converter; and a counter test circuit that is provided independently from the A/D converter, and tests the counter, based on a matching of the expected value of the count signal with the count signal supplied through the count signal line from the counter. This configuration allows the count signal to be checked concurrently with imaging of an object.
    Type: Grant
    Filed: September 21, 2012
    Date of Patent: December 3, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroki Hiyama, Tetsuya Itano, Kazuhiro Saito, Yu Maehashi, Koichiro Iwata, Kohichi Nakamura
  • Patent number: 8593552
    Abstract: Systems and methods for generating images of an object having a known object velocity include imaging electromagnetic radiation from the object onto a sensor array of an imaging system, adjusting at least one of a shutter rate and a shutter direction of the imaging system in accordance with an image velocity of the image across the sensor array, and sampling output of the sensor array in accordance with the shutter rate and the shutter direction to generate the images. Systems and methods for generating images of an object moving through a scene include a first imaging system generating image data samples of the scene, a post processing system that analyzes the samples to determine when the object is present in the scene, and one or more second imaging systems triggered by the post processing system to generate one or more second image data samples of the object.
    Type: Grant
    Filed: September 13, 2011
    Date of Patent: November 26, 2013
    Assignee: OmniVision Technologies, Inc.
    Inventors: Edward R. Dowski, Jr., Kenneth S. Kubala, Hans Brandon Wach
  • Patent number: 8582002
    Abstract: An imaging method includes a step of setting, when a digital zoom operation mode for enlarging an image imaged by a imaging part of an X-Y address type is selected, a zoom magnification and enlarging the image at the zoom magnification set. The imaging method includes the steps of: setting an imaging range in a vertical direction of the imaging part according to the zoom magnification set in the digital zoom step; outputting a driving signal for scanning the shutter signal and the readout signal to perform exposure in the imaging range set in the imaging range setting step and driving the imaging part; and discarding, when the zoom magnification is changed in the digital zoom step, images imaged by the imaging part before and after the change of the zoom magnification to prevent the images from being used.
    Type: Grant
    Filed: October 29, 2012
    Date of Patent: November 12, 2013
    Assignee: Sony Corporation
    Inventors: Masato Yoneda, Toshio Yamada
  • Patent number: 8575533
    Abstract: The present invention discloses a high dynamic range imager circuit and a method for reading high dynamic range image with an adaptive conversion gain. The high dynamic range image circuit includes a variable capacitor. The capacitance of the variable capacitor is adjusted according to sensed light intensity or by internal feedback control, to adaptively adjust the conversion gain of the high dynamic range image circuit as it reads a signal which relates to a pixel image sensed by an image sensor device. In each cycle, the signal can be read twice or more with different dynamic ranges, to enhance the accuracy of the signal.
    Type: Grant
    Filed: November 9, 2011
    Date of Patent: November 5, 2013
    Assignee: Pixart Imaging Incorporation, R.O.C.
    Inventors: Wen-Cheng Yen, Ching-Wei Chen, Chao-Chi Lee
  • Patent number: 8570395
    Abstract: According to one embodiment, a solid-state imaging device includes a pixel unit, a flicker detecting unit, a flicker-level estimating unit, and a flicker correcting unit. The flicker detecting unit detects, based on a magnitude relation of a signal amount in each of lines formed in the pixel unit, presence or absence of a flicker. The flicker-level estimating unit estimates a flicker level in each of the lines of the next frame. The flicker correcting unit corrects, for each of the lines, a flicker that occurs in a signal of an image picked up by the pixel unit.
    Type: Grant
    Filed: March 25, 2013
    Date of Patent: October 29, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Yoshitaka Egawa
  • Patent number: 8570411
    Abstract: The objective of this invention is to provide a solid-state image pickup device and its driving method that has a minimum circuit area and a wide dynamic range. The invention includes: a sensor array SA; a memory M; and a signal determination circuit DC. The sensor array has plural pixels in an array integrated on a semiconductor substrate. Each pixel sequentially outputs a first signal and a second signal. The memory M is connected to each column of pixels array and stores the first signal or the second signal. The signal determination circuit DC outputs signal (SS) such that it works as follows: when the first signal is input to memory M from the pixel, the signal determination circuit DC determines whether the first signal can be used. If so, the first signal is selected and the second signal is discarded and is not output to memory M. When the second signal is selected, the second signal is uploaded to memory M.
    Type: Grant
    Filed: February 8, 2010
    Date of Patent: October 29, 2013
    Assignee: Texas Instruments Incorporated
    Inventors: Jose Tejada, Rafael Dominguez-Castro, Fernando Medeiro-Hidalgo, Francisco J. Jimenez-Garrido
  • Patent number: 8553117
    Abstract: A method and apparatus are disclosed for forming an image signal by receiving a flux of photons at a convex photodetector such as a hemispherical photodetector. The convex photodetector includes a plurality of photosensors. Each photosensor has a different orientation with respect to a propagation vector of the flux of photons. The photosensors generate a respective plurality of intensity signals. Each of the intensity signals is related to the respective orientation of the photosensor that generates it. The intensity signals are received by a signal processor, such as a digital signal processor, which uses the intensity signals to compute an image signal related to the intensity signals and thereby produce a focused output image.
    Type: Grant
    Filed: October 20, 2010
    Date of Patent: October 8, 2013
    Inventor: Allan J. Cooper
  • Patent number: 8553139
    Abstract: The present invention is an image pickup apparatus including an image pickup device having an image pickup plane on which pixels are two-dimensionally arranged, a mechanical rear curtain shutter that runs along the image pickup plane to control passage/shielding of light, a system control section that divides the image pickup plane into a plurality of pixel groups along the running direction ahead of running of the mechanical rear curtain shutter and collectively resets charge of all pixels in one pixel group sequentially at timing per pixel group according to running characteristics of the mechanical rear curtain shutter, and an image processing section that corrects a signal level of an image signal read from the image pickup device to approximate to an image signal obtained when the pixels have a same exposure time based on the running characteristics of the mechanical rear curtain shutter and reset timing for each pixel group.
    Type: Grant
    Filed: January 10, 2011
    Date of Patent: October 8, 2013
    Assignee: Olympus Imaging Corp.
    Inventor: Hiroaki Iwasaki
  • Patent number: 8553116
    Abstract: Shutter blades are driven so that light which hits an image sensor which has been hit by the light is blocked (timing t5). That the shutter blades have moved a predetermined amount is detected before the start of the shutter blades blocking the light (timing t6), and furthermore, reset scanning of the exposure amount of the image sensor vertically upwards is started at a reset timing according to the detection before the start of the shutter blades blocking the light (timing t7). Due to this, it is possible for the exposure amount of the image sensor to be reset at a timing corresponding to the type of driving of the shutter for each camera in a case where there is variation or change in the type of driving due to individual unit differences or changes over time in the shutter mechanism.
    Type: Grant
    Filed: March 6, 2012
    Date of Patent: October 8, 2013
    Assignee: Seiko Epson Corporation
    Inventor: Eiji Tsubono
  • Patent number: 8553107
    Abstract: An imaging apparatus includes a plurality of photoelectric conversion units configured to output an image signal obtained by executing photoelectric conversion and a noise signal; a clipping unit configured to clip the noise signal to a clipping level when the noise signal exceeds a preset clipping level; a control unit configured to calculate the clipping level based on a signal read from the plurality of photoelectric conversion units and set the calculated clipping level to the clipping unit as the preset clipping level; and a differential unit configured to execute differential processing of subtracting a noise signal read from the photoelectric conversion unit and clipped by the clipping unit, from an image signal read from the plurality of the photoelectric conversion units.
    Type: Grant
    Filed: July 6, 2011
    Date of Patent: October 8, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventor: Toshiki Ishida
  • Patent number: 8553122
    Abstract: A system and method for driving a solid-state image pickup device including a pixel array unit including unit pixels. Each unit pixel includes a photoelectric converter, column signal lines and a number of analog-digital converting units. The unit pixels are selectively controlled in units of rows. Analog signals output from the unit pixels in a row selected by the selective control though the column signal lines are converted to digital signals via the analog-digital converting units. The digital signals are added among a number of unit pixels via the analog-digital converting units. The added digital signals from the analog-digital converting units are read. Each unit pixel in the pixel array unit is selectively controlled in units of arbitrary rows, the analog-distal converting units being operable to performing the converting in a (a) normal-frame-rate mode and a (b) high-frame-rate mode in response to control signals.
    Type: Grant
    Filed: April 26, 2011
    Date of Patent: October 8, 2013
    Assignee: Sony Corporation
    Inventors: Yoshikazu Nitta, Noriyuki Fukushima, Yoshinori Muramatsu, Yukihiko Yasui
  • Patent number: 8547476
    Abstract: An imager and a method for real-time, non-destructive monitoring of light incident on imager pixels during their exposure to light. Real-time or present pixel signals, which are indicative of present illumination on the pixels, are compared to a reference signal during the exposure. Adjustments, if necessary, are made to programmable parameters such as gain and/or exposure time to automatically control the imager's exposure to the light. In a preferred exemplary embodiment, only a selected number of pixels are monitored for exposure control as opposed to monitoring the entire pixel array.
    Type: Grant
    Filed: February 23, 2012
    Date of Patent: October 1, 2013
    Assignee: Micron Technology, Inc.
    Inventors: Alf Olsen, Espen A. Olsen, Jorgen Moholt, Steinar Iversen, Dov Avni, Arkady Glukhovsky
  • Patent number: 8542281
    Abstract: This invention provides a system and method captures a moving image of a scene that can be more readily de-blurred as compared to images captured through the above-referenced and other known methods operating on an equivalent exposure-time interval. Rather than stopping and starting the integration of light measurement during the exposure-time interval, photo-generated current is switched between multiple charge storage sites in accordance with a temporal switching pattern that optimizes the conditioning of the solution to the inverse blur transform. By switching the image intensity signal between storage sites all of the light energy available during the exposure-time interval is transduced to electronic charge and captured to form a temporally decomposed representation of the moving image.
    Type: Grant
    Filed: September 14, 2009
    Date of Patent: September 24, 2013
    Assignee: Cognex Corporation
    Inventors: E. John McGarry, William M. Silver
  • Patent number: 8537259
    Abstract: A photoelectric conversion circuit includes: a photoelectric conversion element having one end to which bias voltage is applied and the other end from which photo current according to an amount of received light is output; and a photo current detecting unit clamping voltage of the other end of the photoelectric conversion element to a predetermined potential and detecting the photo current.
    Type: Grant
    Filed: August 18, 2008
    Date of Patent: September 17, 2013
    Assignee: Rohm Co., Ltd.
    Inventors: Hiroshi Sekiguchi, Takaaki Fuchikami
  • Patent number: 8537257
    Abstract: An anti-eclipse circuit for an imaging sensor monitors the photo signal level output by a pixel to determine whether the photo signal corresponds to the pixel being operated at a saturated state. If so, there is a risk that the pixel may be susceptible to an eclipse distortion. When the pixel is detected as being operated in a saturated state, the anti-eclipse circuit pulls up the reset signal level previously stored in a sample and hold circuit to an appropriate voltage level in order to prevent an eclipse distortion from arising.
    Type: Grant
    Filed: August 27, 2010
    Date of Patent: September 17, 2013
    Assignee: Micron Technology, Inc.
    Inventors: Jeffrey Rysinski, Sanjayan Vinayagamoorthy
  • Patent number: 8531537
    Abstract: An imaging apparatus includes a readout unit that reads still picture signals from first pixels among a plurality of pixels disposed on an imaging device and reads motion picture signals from second pixels among the plurality of pixels at predetermined frame cycles, and a readout control unit that controls the readout timings of the still picture signals based on the length of a still picture exposure period for accumulating the still picture signals and the length of a motion picture frame cycle period which is the period of the frame cycles.
    Type: Grant
    Filed: September 8, 2010
    Date of Patent: September 10, 2013
    Assignee: Olympus Corporation
    Inventors: Shunsuke Suzuki, Hideki Kato
  • Patent number: 8531550
    Abstract: Automatic exposure adjusting device considers the image on a pixel-by-pixel basis. Each pixel is characterized according to its most significant bits. After the pixels are characterized, the number of pixels in any particular group is counted. That counting is compared with thresholds which set whether the image is over exposed, under exposed, and can optionally also determine if the image is seriously over exposed or seriously under exposed. Adjustment of the exposure is carried out to bring the image to a more desired state.
    Type: Grant
    Filed: November 7, 2011
    Date of Patent: September 10, 2013
    Assignee: Round Rock Research, LLC
    Inventors: Eric R. Fossum, Alexander I. Krymski, Roger A. Panicacci, Christopher Clark
  • Publication number: 20130229554
    Abstract: An image taking unit takes an image by using a specific light projector which emits specific light in a wavelength region corresponding to one of the three primary colors of light and by exposing light receivers which are sensitive to light in wavelength regions corresponding to the three primary colors of light. A marker pulse generator generates an exposure timing pulse for the image taking unit, and an emission timing pulse for the specific light projector on the basis of a reference signal. A color image creator creates a color image from an image taken by the image taking unit. A synchronous detection processor creates a detection image by performing a synchronous detection process on the image taken by the image taking unit by use of the reference signal.
    Type: Application
    Filed: February 27, 2013
    Publication date: September 5, 2013
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Yosuke MATSUNO, Hiroshi Satoh, Hidekazu Nishiuchi
  • Publication number: 20130208157
    Abstract: An imaging system configured to capture an image is provided, the imaging system including a high dynamic range imager configured to capture at least one high dynamic range image, and circuitry, wherein scheduling tasks within a row time interval is arranged to permit sharing of circuits used for correlated double sampling with selective reset tasks and with pixel readout tasks, and wherein scheduling tasks within a row time interval is arranged to permit sharing of comparator with selective reset tasks and with pixel readout tasks, while also providing at least one selectable integration period for which the integration period is adjustable and set to substantially less than a row time interval.
    Type: Application
    Filed: February 14, 2013
    Publication date: August 15, 2013
    Applicant: GENTEX CORPORATION
    Inventor: Gentex Corporation
  • Patent number: 8508637
    Abstract: Disclosed are an image sensor and a local binning method in which binning is applied selectively. For example, binning is applied to pixels having low illumination and binning is not applied to non-low illumination pixels. Information on pixels having low illumination for a first image frame may be stored and used to perform binning with respect to areas of a second image frame corresponding to low illumination pixel areas determined with respect to the first image frame.
    Type: Grant
    Filed: July 12, 2010
    Date of Patent: August 13, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sang-wook Han, Hyun-chul Song, Won-hee Choe
  • Patent number: 8497927
    Abstract: A method of operating an imaging system comprising an imaging sensor and a processing system, the processing system having an operating frequency and the sensor having a nominal sampling rate. The method comprises using the imaging sensor with a new sampling rate that is different that the nominal sampling rate.
    Type: Grant
    Filed: June 30, 2005
    Date of Patent: July 30, 2013
    Assignee: Broadcom Corporation
    Inventors: Ilya Vitsnudel, Noam Sorek
  • Patent number: 8493483
    Abstract: An image sensor includes a plurality of pixels, a plurality of sense circuits, and a count circuit. Each sense circuit is configured to read out electrical signals from at least one pixel associated with the sense circuit in order to generate data representing whether or not photons have been received by the sense circuit. The count circuit is in communication with a sense circuit selected from the plurality of sense circuits. The count circuit is configured to provide integration results for the pixels associated with the sense circuits based on the data received from the sense circuits.
    Type: Grant
    Filed: September 24, 2010
    Date of Patent: July 23, 2013
    Assignee: Sony Corporation
    Inventor: Toshiyuki Nishihara
  • Patent number: 8487985
    Abstract: An imaging apparatus includes a noise reduction circuit which eliminates a random noise generated in an analogue signal processing by equalizing, via an averaging processing, image data of correlated multiple images within one frame period which is captured by an image sensor and to which the analogue signal processing is performed in an AFE block, and the imaging apparatus in itself deals with the image data of the correlated multiple images within the one frame period and outputs the data to a wireless module after eliminating the random noise generated in the analogue signal processing.
    Type: Grant
    Filed: June 3, 2009
    Date of Patent: July 16, 2013
    Assignee: Olympus Medical Systems Corp.
    Inventor: Kei Mitsuhashi
  • Patent number: 8488034
    Abstract: An imaging device includes: a pixel array section having an array of pixels each of which has a photoelectric converting device and outputs an electric signal according to an input photon; a sense circuit section having a plurality of sensor circuits each of which makes binary decision on whether there is a photon input to a pixel in a predetermined period upon reception of the electric signal therefrom; and a decision result IC section which integrates decision results from the sense circuits, pixel by pixel or for each group of pixels, multiple times to generate imaged data with a gradation, the decision result IC section including a count circuit which performs a count process to integrate the decision results from the sense circuits, and a memory for storing a counting result for each pixel from the count circuit, the plurality of sense circuits sharing the count circuit for integrating the decision results.
    Type: Grant
    Filed: July 29, 2010
    Date of Patent: July 16, 2013
    Assignee: Sony Corporation
    Inventor: Toshiyuki Nishihara
  • Patent number: 8482656
    Abstract: An apparatus that detects an in-focus state according to the present invention has a plurality of line sensors arranged on a projection area of an optical image-forming system; a plurality of monitor sensors arranged on the projection area with each monitor sensor positioned adjacent to a corresponding line sensor and monitoring a quantity of light incident on the corresponding line sensor; an electric charge accumulation controller that controls the timing of completion of the accumulation of electric charges in the plurality of line sensors on the basis of monitor signals output from corresponding monitor sensors; that controls the timing of the commencement of the subsequent accumulation of electric charges in the plurality of line sensors; and a signal output processor that reads the accumulated electric charges from the plurality of line sensors and then outputs image signals corresponding to an object image.
    Type: Grant
    Filed: November 18, 2010
    Date of Patent: July 9, 2013
    Assignee: Pentax Ricoh Imaging Company, Ltd.
    Inventors: Koichi Sato, Masahiro Kawasaki
  • Patent number: 8477222
    Abstract: In a solid state image sensor having a pixel array, a first frame is imaged using varying exposure times in a series of zones. The exposure time for a subsequent frame is selected from the results of the first frame, The exposure times are controlled in a rolling blade manner by controlling the number of lines between reset and readout. The sensor is particularly suited to use in bar code readers.
    Type: Grant
    Filed: November 13, 2006
    Date of Patent: July 2, 2013
    Assignee: STMicroelectronics (R&D) Ltd.
    Inventor: Justin Richardson
  • Patent number: 8456556
    Abstract: A sensing pixel array is provided and includes a plurality of pixels disposed in an array. Each pixel operates during an exposure period and a readout period and generates a readout signal. Each pixel includes a sensing unit and a sampling unit. The sensing unit senses light to generate a sensing signal during the exposure period. The sampling unit samples the sensing signal to generate a sensing output signal which serves as the readout signal during the readout period. During the exposure period, the sampling unit acts as a memory unit for storing an input signal and outputting an accessed output signal which serves as the readout signal.
    Type: Grant
    Filed: January 20, 2011
    Date of Patent: June 4, 2013
    Assignee: Himax Imaging, Inc.
    Inventors: Ping-Hung Yin, Shuenn-Ren Hsiao
  • Patent number: 8456540
    Abstract: According to one embodiment, a solid-state imaging device includes a pixel unit, a flicker detecting unit, a flicker-level estimating unit, and a flicker correcting unit. The flicker detecting unit detects, based on a magnitude relation of a signal amount in each of lines formed in the pixel unit, presence or absence of a flicker. The flicker-level estimating unit estimates a flicker level in each of the lines of the next frame. The flicker correcting unit corrects, for each of the lines, a flicker that occurs in a signal of an image picked up by the pixel unit.
    Type: Grant
    Filed: August 3, 2010
    Date of Patent: June 4, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Yoshitaka Egawa
  • Patent number: 8456557
    Abstract: Aspects of the invention provide dynamic range extension for CMOS image sensors for mobile applications. An embodiment of the invention may comprise setting for each pixel in a pixel array one of a plurality of integration times and one of a plurality of signal gains, wherein the settings may be used to generate corresponding digital data for each pixel in the pixel array. The corresponding digital data for adjacent pixels for the same color plane may then be grouped into a superpixel, where each pixel has associated with it a different combination of integration time and signal gain.
    Type: Grant
    Filed: January 31, 2011
    Date of Patent: June 4, 2013
    Assignee: SK Hynix Inc.
    Inventors: Yibing Michelle Wang, Jeff Rysinski, Hongyu Wang
  • Patent number: 8456566
    Abstract: A focus range is determined on the basis of an object distance, focal distance, and aperture value, after an autofocus operation. When SW2 is operated, an exposure is performed only during a period that a displacement of a blur in an optical-axis direction is within the focus range. If an exposure time for one exposure does not reach an exposure time to obtain an optimum exposure, a plurality of exposures are performed until a total exposure time reaches the exposure time to obtain the optimum exposure. When the plurality of exposures are performed, a plurality of images obtained are combined to generate an image with the optimum exposure.
    Type: Grant
    Filed: August 12, 2010
    Date of Patent: June 4, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventor: Kouji Okada
  • Patent number: 8456327
    Abstract: An automatic vehicle equipment control system and methods thereof are provided, the system includes at least one imager configured to acquire a continuous sequence of high dynamic range single frame images, a processor, a color spectral filter array including a plurality of color filters, at least a portion of which are different colors, and pixels of an imager pixel array being in optical communication with substantially one spectral color filter, and a lens, wherein the imager is configured to capture a non-saturated image of nearby oncoming headlamps and at least one of a diffuse lane marking and a distant tail lamp in one image frame of the continuous sequence of high dynamic range single frame images, and the system configured to detect at least one of said highway markings and said tail lamps, and quantify light from the oncoming headlamp from data in the one image frame.
    Type: Grant
    Filed: February 25, 2011
    Date of Patent: June 4, 2013
    Assignee: Gentex Corporation
    Inventors: Jon H. Bechtel, Jeremy C. Andrus, Gregory S. Bush, David J. Wright, Jim L. Schneider, Tom B. Sherman