Patents by Inventor Atsuko Kume

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

  • Patent number: 8530816
    Abstract: A photoelectric conversion device may include a pixel array including a plurality of two-dimensionally arranged pixels, and a plurality of analog-to-digital converters (ADCs). Each ADC may include a pulse delay circuit including a plurality of connected delay unit stages, each of which delays a pulse signal during a delay time corresponding to a magnitude of a voltage of the pixel signal read from the pixel array, an encoder unit that outputs a digital value based on the number of stages of the delay units through which the pulse signal has passed during a predetermined time, and a correction unit that corrects the digital value output by the encoder unit by a rate corresponding to the number of stages of the delay units through which the pulse signal has passed during a predetermined period.
    Type: Grant
    Filed: July 7, 2011
    Date of Patent: September 10, 2013
    Assignee: Olympus Corporation
    Inventor: Atsuko Kume
  • Patent number: 8441563
    Abstract: An electric conversion device may include A/D converters each of which includes a pulse delay circuit and an encoder, the pulse delay circuit including delay units each of which delaying a pulse signal with a delay time based on the difference between a voltage of a pixel signal and a reference voltage, the delay units being connected so that the pulse signal can circulate through the delay units, the encoder outputting a digital value based on the number of the delay units that the pulse signal passes through within a predetermined period of time. The encoder may include a latch circuit that includes latch units storing delay information, the delay information being output when the pulse signal passes through each of the delay units, an encoder unit that outputs the digital value based on the delay information, and a counter unit that counts the number of circulations.
    Type: Grant
    Filed: September 28, 2010
    Date of Patent: May 14, 2013
    Assignee: Olympus Corporation
    Inventor: Atsuko Kume
  • Patent number: 8432469
    Abstract: A photoelectric conversion device may include a plurality of A/D converters each of which receives a pixel signal from a pixel array that includes pixels arranged two-dimensionally. Each of the pixels may have a photoelectric conversion element. The pixel array may output the pixel signal in accordance with an incident light amount to the photoelectric conversion element. The plurality of A/D converters may convert the pixel signal to a digital value based on a reference voltage. The plurality of A/D converters may output the digital value. A reference voltage wire, which supplies the reference voltage to each of the plurality of A/D converters, may be branched into a plurality of branched reference voltage wires each of which is corresponding to one of the plurality of A/D converters. Each of the plurality of branched reference voltage wires may be connected only to constituent components in a corresponding A/D converter.
    Type: Grant
    Filed: September 8, 2010
    Date of Patent: April 30, 2013
    Assignee: Olympus Corporation
    Inventor: Atsuko Kume
  • Patent number: 8400540
    Abstract: A photoelectric conversion device may include a plurality of A/D converters each of which receives a pixel signal from a pixel array that includes pixels arranged two-dimensionally. Each of the pixels may have a photoelectric conversion element. The pixel array may output the pixel signal in accordance with an incident light amount to the photoelectric conversion element. The plurality of A/D converters may convert the pixel signal to a digital value based on a reference voltage. The plurality of A/D converters may output the digital value. A reference voltage wire, which supplies the reference voltage to each of the plurality of A/D converters, may be branched into a plurality of branched reference voltage wires each of which is corresponding to one of the plurality of A/D converters. Each of the plurality of branched reference voltage wires may be connected only to constituent components in a corresponding A/D converter.
    Type: Grant
    Filed: September 8, 2010
    Date of Patent: March 19, 2013
    Assignee: Olympus Corporation
    Inventor: Atsuko Kume
  • Patent number: 8373783
    Abstract: A photoelectric conversion device may include a plurality of A/D converters each of which receives a pixel signal from a pixel array that includes pixels arranged two-dimensionally. Each of the pixels may have a photoelectric conversion element. The pixel array may output the pixel signal in accordance with an incident light amount to the photoelectric conversion element. The plurality of A/D converters may convert the pixel signal to a digital value based on a reference voltage. The plurality of A/D converters may output the digital value. A reference voltage wire, which supplies the reference voltage to each of the plurality of A/D converters, may be branched into a plurality of branched reference voltage wires each of which is corresponding to one of the plurality of A/D converters. Each of the plurality of branched reference voltage wires may be connected only to constituent components in a corresponding A/D converter.
    Type: Grant
    Filed: September 8, 2010
    Date of Patent: February 12, 2013
    Assignee: Olympus Corporation
    Inventor: Atsuko Kume
  • Patent number: 8106985
    Abstract: A solid-state imaging apparatus including: a pixel section having a first pixel shielded from light and a second pixel provided in a region over which an object image is formed; a delay circuit having delay devices connected into a multiple of stages for giving to a running pulse a delay amount corresponding to a difference between an analog output value of each pixel from the pixel section and an analog reference value; an encoder to be reset by the unit of pixel with sampling and encoding a running position of the pulse at every predetermined timing; a first storage section for retaining an encoded value corresponding to the first pixel; a second storage section for retaining an encoded value corresponding to the second pixel; and a differential circuit for computing and outputting as a digital pixel signal a difference between an output from the first storage section and an output from the second storage section.
    Type: Grant
    Filed: March 20, 2009
    Date of Patent: January 31, 2012
    Assignee: Olympus Corporation
    Inventor: Atsuko Kume
  • Patent number: 8102441
    Abstract: A solid-state imaging apparatus including: a pixel section with a plurality of pixels arranged into two dimensions, each having a photoelectric conversion section for effecting photoelectric conversion, an accumulation section for temporarily storing a signal generated at the photoelectric conversion section, a transfer means for transferring the signal of the photoelectric conversion section to the accumulation section, a reset means for resetting the accumulation section, an amplification means for amplifying and outputting an electric potential of the accumulation section, and a select means for selecting the amplification means; and a noise suppressing circuit for suppressing a variance of a signal at the time of reset of each pixel, having a switch section for switching a polarity of a difference between a first signal and a second signal that are different in a characteristic due to pixel.
    Type: Grant
    Filed: April 1, 2008
    Date of Patent: January 24, 2012
    Assignee: Olympus Corporation
    Inventor: Atsuko Kume
  • Publication number: 20110290985
    Abstract: A photoelectric conversion device may include a pixel array including a plurality of two-dimensionally arranged pixels, and a plurality of analog-to-digital converters (ADCs). Each ADC may include a pulse delay circuit including a plurality of connected delay unit stages, each of which delays a pulse signal during a delay time corresponding to a magnitude of a voltage of the pixel signal read from the pixel array, an encoder unit that outputs a digital value based on the number of stages of the delay units through which the pulse signal has passed during a predetermined time, and a correction unit that corrects the digital value output by the encoder unit by a rate corresponding to the number of stages of the delay units through which the pulse signal has passed during a predetermined period.
    Type: Application
    Filed: July 7, 2011
    Publication date: December 1, 2011
    Applicant: OLYMPUS CORPORATION
    Inventor: Atsuko Kume
  • Patent number: 8045027
    Abstract: A solid-state imaging apparatus including: a pixel section where a plurality of pixels each containing a photoelectric conversion device are formed into an array; a retaining circuit for retaining one or the other of a reset signal and a light signal of the signals from the pixel; and an AD converter, the AD converter includes: a delay circuit having two input signal terminals to one of the input signal terminals of which the signal retained at the retaining circuit is inputted and to the other one of the input signal terminal of which the other signal not retained at the retaining circuit is inputted, said delay circuit having delay devices connected into a multiple of stages for giving to a running pulse a delay amount corresponding to the extent of a difference between the signals inputted to said one and the other input signal terminals; and an encoder for sampling and encoding a running position of the pulse at every predetermined timing to generate a digital value corresponding to the difference between
    Type: Grant
    Filed: March 20, 2009
    Date of Patent: October 25, 2011
    Assignee: Olympus Corporation
    Inventor: Atsuko Kume
  • Publication number: 20110233381
    Abstract: An electric conversion device may include A/D converters each of which includes a pulse delay circuit and an encoder, the pulse delay circuit including delay units each of which delaying a pulse signal with a delay time based on the difference between a voltage of a pixel signal and a reference voltage, the delay units being connected so that the pulse signal can circulate through the delay units, the encoder outputting a digital value based on the number of the delay units that the pulse signal passes through within a predetermined period of time. The encoder may include a latch circuit that includes latch units storing delay information, the delay information being output when the pulse signal passes through each of the delay units, an encoder unit that outputs the digital value based on the delay information, and a counter unit that counts the number of circulations.
    Type: Application
    Filed: September 28, 2010
    Publication date: September 29, 2011
    Applicant: OLYMPUS CORPORATION
    Inventor: Atsuko Kume
  • Patent number: 7990439
    Abstract: A solid-state imaging apparatus including, among other things, a control section that, after simultaneous and concurrent reset of all first and second input sections, effects control so as to cause all the first input sections to concurrently and simultaneously accumulate the signal associated with the object image having the same exposure start timing; a correction data retaining section that retains correction data to correct a characteristic variance between the first input section and the second input section where the correction data is generated by taking a difference between a noise signal of the first input section and a noise signal of the second input section containing the characteristic variance; and a variance correction section that generates a third pixel signal corresponding to a difference between the first pixel signal and the second pixel signal where the characteristic variance is corrected by subtracting the correction data from the third pixel signal.
    Type: Grant
    Filed: July 15, 2008
    Date of Patent: August 2, 2011
    Assignee: Olympus Corporation
    Inventor: Atsuko Kume
  • Publication number: 20110058078
    Abstract: A photoelectric conversion device may include a plurality of A/D converters each of which receives a pixel signal from a pixel array that includes pixels arranged two-dimensionally. Each of the pixels may have a photoelectric conversion element. The pixel array may output the pixel signal in accordance with an incident light amount to the photoelectric conversion element. The plurality of A/D converters may convert the pixel signal to a digital value based on a reference voltage. The plurality of A/D converters may output the digital value. A reference voltage wire, which supplies the reference voltage to each of the plurality of A/D converters, may be branched into a plurality of branched reference voltage wires each of which is corresponding to one of the plurality of A/D converters. Each of the plurality of branched reference voltage wires may be connected only to constituent components in a corresponding A/D converter.
    Type: Application
    Filed: September 8, 2010
    Publication date: March 10, 2011
    Applicant: OLYMPUS CORPORATION
    Inventor: Atsuko Kume
  • Patent number: 7872677
    Abstract: A solid-state imaging apparatus includes: a pixel section where a plurality of pixels for effecting photoelectric conversion are two-dimensionally arranged, having an effective pixel section consisting of pixels for receiving object light and a reference pixel section consisting of pixels shielded from light; a first scanning circuit for sequentially setting to the pixel section the pixels to be read out a signal; a noise suppressing circuit for suppressing noise components of signals from the pixels based on a first control signal associated with sampling and holding of signals from the pixels and a second control signal associated with setting of clamping potential that are applied at respective predetermined timings; a second scanning circuit for sequentially reading signals of each pixel suppressed of the noise components; and a reference signal control section for applying the first and second control signals to the noise suppressing circuit so that it is brought into one or the other of a first conditio
    Type: Grant
    Filed: November 13, 2007
    Date of Patent: January 18, 2011
    Assignee: Olympus Corporation
    Inventor: Atsuko Kume
  • Publication number: 20090303361
    Abstract: A solid-state image pickup apparatus includes: a pixel portion in which at least one pixel with a photo-electric conversion element is arranged; an analog/digital converter comprising: a delay circuit in which delay elements are connected in multiple stages, the delay elements having a delay amount in accordance with a difference between an output voltage that is output from the pixel portion for every pixel and a predetermined reference voltage; and a decoder portion that, after detecting a number of circulations, in the delay circuit, of a pulse propagating in the delay circuit and a number of stages, of the delay elements connected in multiple stages, through which the pulse has propagated, outputs a digital signal based on the detected number of circulations and stages for each of the pixels; and a control circuit which controls the analog/digital converter so as to modify a number of bits of the digital signal that is output from the analog/digital converter, in accordance with on a preset shooting mode,
    Type: Application
    Filed: June 9, 2009
    Publication date: December 10, 2009
    Applicant: OLYMPUS CORPORATION
    Inventors: Masashi Saito, Atsuko Kume
  • Publication number: 20090244337
    Abstract: A solid-state imaging apparatus including: a pixel section where a plurality of pixels each containing a photoelectric conversion device are formed into an array; a retaining circuit for retaining one or the other of a reset signal and a light signal of the signals from the pixel; and an AD converter, the AD converter includes: a delay circuit having two input signal terminals to one of the input signal terminals of which the signal retained at the retaining circuit is inputted and to the other one of the input signal terminal of which the other signal not retained at the retaining circuit is inputted, said delay circuit having delay devices connected into a multiple of stages for giving to a running pulse a delay amount corresponding to the extent of a difference between the signals inputted to said one and the other input signal terminals; and an encoder for sampling and encoding a running position of the pulse at every predetermined timing to generate a digital value corresponding to the difference between
    Type: Application
    Filed: March 20, 2009
    Publication date: October 1, 2009
    Applicant: OLYMPUS CORPORATION
    Inventor: Atsuko KUME
  • Publication number: 20090244338
    Abstract: A solid-state imaging apparatus including: a pixel section having a first pixel shielded from light and a second pixel provided in a region over which an object image is formed; a delay circuit having delay devices connected into a multiple of stages for giving to a running pulse a delay amount corresponding to a difference between an analog output value of each pixel from the pixel section and an analog reference value; an encoder to be reset by the unit of pixel with sampling and encoding a running position of the pulse at every predetermined timing; a first storage section for retaining an encoded value corresponding to the first pixel; a second storage section for retaining an encoded value corresponding to the second pixel; and a differential circuit for computing and outputting as a digital pixel signal a difference between an output from the first storage section and an output from the second storage section.
    Type: Application
    Filed: March 20, 2009
    Publication date: October 1, 2009
    Applicant: OLYMPUS CORPORATION
    Inventor: Atsuko Kume
  • Publication number: 20090021622
    Abstract: A solid-state imaging apparatus including: a pixel section with a plurality of pixels that are two-dimensionally arranged, the pixels including a first pixel having a first input section for accumulating a signal associated with object image, a first amplification section for amplifying signals accumulated at the first input section so as to generate a first pixel signal, a first reset section for resetting the first input section, and a first select section for selecting the first amplification section to cause the first pixel signal to be outputted onto a signal output line, and a second pixel having a second input section for accumulating a signal corresponding to a noise generated at the first input section, a second amplification section for amplifying signals accumulated at the second input section so as to generate a second pixel signal, a second reset section for resetting the second input section, and a second select section for selecting the second amplification section to cause the second pixel sig
    Type: Application
    Filed: July 15, 2008
    Publication date: January 22, 2009
    Applicant: OLYMPUS CORPORATION
    Inventor: Atsuko Kume
  • Publication number: 20080239108
    Abstract: A solid-state imaging apparatus including: a pixel section with a plurality of pixels arranged into two dimensions, each having a photoelectric conversion section for effecting photoelectric conversion, an accumulation section for temporarily storing a signal generated at the photoelectric conversion section, a transfer means for transferring the signal of the photoelectric conversion section to the accumulation section, a reset means for resetting the accumulation section, an amplification means for amplifying and outputting an electric potential of the accumulation section, and a select means for selecting the amplification means; and a noise suppressing circuit for suppressing a variance of a signal at the time of reset of each pixel, having a switch section for switching a polarity of a difference between a first signal and a second signal that are different in a characteristic due to pixel.
    Type: Application
    Filed: April 1, 2008
    Publication date: October 2, 2008
    Applicant: OLYMPUS CORPORATION
    Inventor: Atsuko Kume
  • Publication number: 20080112016
    Abstract: A solid-state imaging apparatus includes: a pixel section where a plurality of pixels for effecting photoelectric conversion are two-dimensionally arranged, having an effective pixel section consisting of pixels for receiving object light and a reference pixel section consisting of pixels shielded from light; a first scanning circuit for sequentially setting to the pixel section the pixels to be read out a signal; a noise suppressing circuit for suppressing noise components of signals from the pixels based on a first control signal associated with sampling and holding of signals from the pixels and a second control signal associated with setting of clamping potential that are applied at respective predetermined timings; a second scanning circuit for sequentially reading signals of each pixel suppressed of the noise components; and a reference signal control section for applying the first and second control signals to the noise suppressing circuit so that it is brought into one or the other of a first conditio
    Type: Application
    Filed: November 13, 2007
    Publication date: May 15, 2008
    Applicant: OLYMPUS CORPORATION
    Inventor: Atsuko KUME