Patents by Inventor Hiroaki Ebihara

Hiroaki Ebihara 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).

  • Publication number: 20180220095
    Abstract: A hybrid-bonded image sensor has a photodiode die with multiple macrocells; each macrocell has at least one photodiode and a coupling region. The coupling regions couple to a coupling region of a macrocell unit of a supporting circuitry die where they feed an input of an amplifier and a feedback capacitor. The feedback capacitor also couples to output of the amplifier, and the amplifier inverts between the input and the output. The method includes resetting a photodiode of the photodiode die; coupling signal from photodiode through the bond point to the supporting circuitry die to a feedback capacitor and to an input of the amplifier, the feedback capacitor also coupled to an inverting output of the amplifier; and amplifying the signal with the amplifier, where a capacitance of the feedback capacitor determines a gain of the amplifier.
    Type: Application
    Filed: February 1, 2017
    Publication date: August 2, 2018
    Inventors: Rui WANG, Hiroaki EBIHARA, Zheng YANG, Chun-Ming TANG, Chao-Fang TSAI, Tiejun DAI
  • Patent number: 9967505
    Abstract: Example comparators as disclosed herein may include a first comparator comprising a first plurality of device areas, wherein the first plurality of device areas at least includes a first comparator input device area, a first comparator cascode device area, and a first comparator current mirror area, and a second comparator comprising a second plurality of device areas, wherein the second plurality of device areas at least includes a second comparator input device area, a second comparator cascode device area, and a second comparator current mirror area, where the second comparator input area is disposed between the first comparator input area and the first comparator cascode device area, the first comparator cascode device area is disposed between the second comparator input area and the second comparator cascode device area, the first comparator current mirror area is disposed between the first comparator cascode device area and the second comparator current mirror area, the second comparator cascode device
    Type: Grant
    Filed: April 13, 2017
    Date of Patent: May 8, 2018
    Assignee: OmniVision Technologies, Inc.
    Inventor: Hiroaki Ebihara
  • Publication number: 20180091752
    Abstract: Apparatuses and method for an image sensor with increased analog to digital conversion range and reduced noise are described herein. An example method may include disabling a first auto-zero switch of a comparator, the first auto-zero switch coupled to auto-zero a reference voltage input of the comparator, adjusting an auto-zero offset voltage of a ramp voltage provided to the reference voltage input of the comparator, and disabling a second auto-zero switch of the comparator, the second auto-zero switch coupled to auto-zero a bitline input of the comparator.
    Type: Application
    Filed: September 27, 2016
    Publication date: March 29, 2018
    Inventors: HIROAKI EBIHARA, Zheng Yang
  • Patent number: 9924122
    Abstract: A solid-state imaging device including a photoelectric conversion portion photoelectrically converting incident light into signal charge and accumulate the signal charge, a plurality of signal lines including a transfer signal line to which a transfer signal for reading the signal charge accumulated in the photoelectric conversion portion to a floating diffusion region is input, a driver circuit inputting a plurality of desired signals into the plurality of signal lines including the transfer signal line, and a terminal circuit connected to a side opposite to a side of the transfer signal line where the driver circuit is connected and to which a control signal for securing the transfer signal line at a constant voltage is input before a desired signal of the plurality of desired signals with respect to a signal line adjacent to the transfer signal line of the plurality of signal lines is input to the signal line adjacent to the transfer signal line.
    Type: Grant
    Filed: September 4, 2015
    Date of Patent: March 20, 2018
    Assignee: SONY SEMICONDUCTOR SOLUTIONS CORPORATION
    Inventors: Yoshiharu Kudoh, Hiroaki Ebihara
  • Patent number: 9859312
    Abstract: An image sensor includes a photodiode disposed in a first semiconductor material, and the photodiode is positioned to absorb image light through the backside of the first semiconductor material. A first floating diffusion is disposed proximate to the photodiode and coupled to receive image charge from the photodiode in response to a transfer signal applied to a transfer gate disposed between the photodiode and the first floating diffusion. A second semiconductor material, including a second floating diffusion, is disposed proximate to the frontside of the first semiconductor material. A dielectric material is disposed between the first semiconductor material and the second semiconductor material, and includes a first bonding via extending from the first floating diffusion to the second floating diffusion, a second bonding via disposed laterally proximate to the first bonding via, and a third bonding via disposed laterally proximate to the first bonding via.
    Type: Grant
    Filed: February 8, 2017
    Date of Patent: January 2, 2018
    Assignee: OmniVision Technologies, Inc.
    Inventors: Rui Wang, Hiroaki Ebihara, Zheng Yang, Chun-Ming Tang, Chao-Fang Tsai, Tiejun Dai
  • Patent number: 9838621
    Abstract: A method for implementing H-Banding cancellation in an image sensor starts with a pixel array capturing image data. Pixel array includes a plurality of pixels to generate pixel data signals, respectively. ADC circuitry acquires the pixel data signals. ADC circuitry includes a comparator circuitry. In one embodiment, comparator circuitry 310 includes a plurality of comparators. Comparators included in comparator circuitry compare the pixel data signals, respectively, to a ramp signal received from a ramp generator to generate comparator output signals. Adjacent comparators output signals may be opposite in polarity. Other embodiments are described.
    Type: Grant
    Filed: May 5, 2016
    Date of Patent: December 5, 2017
    Assignee: OmniVision Technologies, Inc.
    Inventors: Zheng Yang, Hiroaki Ebihara
  • Publication number: 20170324910
    Abstract: A method for implementing H-Banding cancellation in an image sensor starts with a pixel array capturing image data. Pixel array includes a plurality of pixels to generate pixel data signals, respectively. ADC circuitry acquires the pixel data signals. ADC circuitry includes a comparator circuitry. In one embodiment, comparator circuitry 310 includes a plurality of comparators. Comparators included in comparator circuitry compare the pixel data signals, respectively, to a ramp signal received from a ramp generator to generate comparator output signals. Adjacent comparators output signals may be opposite in polarity. Other embodiments are described.
    Type: Application
    Filed: May 5, 2016
    Publication date: November 9, 2017
    Inventors: Zheng Yang, Hiroaki Ebihara
  • Patent number: 9774811
    Abstract: Apparatuses and methods for image sensors with increased analog to digital conversion range are described herein. An example method may include disabling a first auto-zero switch of a comparator, the first auto-zero switch coupled to a ramp voltage input of the comparator, increasing, by a ramp generator, an auto-zero voltage level of a ramp voltage provided to the ramp voltage input of the comparator, and disabling a second auto-zero switch of the comparator, the second auto-zero switch coupled to a bitline input of the comparator.
    Type: Grant
    Filed: September 27, 2016
    Date of Patent: September 26, 2017
    Assignee: OmniVision Technologies, Inc.
    Inventors: Hiroaki Ebihara, Zheng Yang
  • Patent number: 9762825
    Abstract: A method for reducing ADC time for dark signals starts with pixel array capturing image data of frames including first frame and second frame. Pixel array includes visible pixels and black pixels (OPB). Scanning circuitry then selects OPB of first frame to be readout. OPB generate a dark signal when selected by scanning circuitry. Column readout circuitry included in readout circuitry then acquires the dark signal of first frame and processes the dark signal based on a ramp signal received from ramp generator included in readout circuitry to generate dark ADC output. Readout circuitry then determines a ramp timing offset based on the dark signal of first frame. The ramp timing offset is then applied to the second frame, which includes generating by the ramp generator the ramp signal for a second frame that includes the ramp timing offset. Other embodiments are described.
    Type: Grant
    Filed: December 30, 2015
    Date of Patent: September 12, 2017
    Assignee: OmniVision Technologies, Inc.
    Inventor: Hiroaki Ebihara
  • Publication number: 20170251135
    Abstract: An imaging device includes an exposure control unit, a determination unit, and an illuminance calculation unit. The exposure control unit is configured to control a plurality of exposure times. The determination unit is configured to determine whether or not saturation occurs using at least one data item of a plurality of data items obtained during the plurality of exposure times. The illuminance calculation unit is configured to calculate, if the determination unit determines that the saturation occurs, an illuminance using a data item different from the at least one data item used in the determination.
    Type: Application
    Filed: May 16, 2017
    Publication date: August 31, 2017
    Inventors: Kazuhide Namba, Youji Sakioka, Hiroaki Ebihara, Daisuke Yoshioka, Ryota Moriwaka
  • Publication number: 20170230592
    Abstract: There is provided a solid state imaging apparatus including a pixel array in which a plurality of unit pixels are arranged two-dimensionally. Each pixel includes a photoelectric conversion element, a transfer transistor which transfers a charge accumulated in the photoelectric conversion element to floating diffusion, a reset transistor which resets the charge of the floating diffusion, and an output transistor which outputs the charge of the floating diffusion. The floating diffusion of at least one of the plurality of unit pixels is electrically connected via the output transistor.
    Type: Application
    Filed: April 26, 2017
    Publication date: August 10, 2017
    Inventors: Takayuki GOTO, Hiroaki EBIHARA, Rei YOSHIKAWA, Koichi OKAMOTO
  • Patent number: 9712765
    Abstract: A solid-state image pickup device includes a pixel unit in which a plurality of photoelectric conversion elements having different sensitivities are arranged; and a pixel reading unit configured to read and add output signals from the plurality of photoelectric conversion elements in the pixel unit, and to obtain an output signal seemingly from one pixel. The pixel unit includes an absorbing unit configured to absorb overflowing electric charge from a photoelectric conversion element with a high sensitivity.
    Type: Grant
    Filed: November 30, 2016
    Date of Patent: July 18, 2017
    Assignee: SONY CORPORATION
    Inventors: Eiichi Funatsu, Hiroaki Ebihara, Yoshiharu Kudoh
  • Patent number: 9712766
    Abstract: A signal processing device includes a control unit that suspends supplying of a signal to an A/D conversion unit which performs A/D conversion, during an A/D conversion period in which the A/D conversion is performed on the signal that depends on an electric charge read from a pixel; and a maintenance unit that maintains a signal value of the signal in a state where the signal is supplied by the control unit to the A/D conversion unit and that supplies the maintained signal value to the A/D conversion unit in a state where the supplying of the signal to the A/D conversion unit is suspended by the control unit.
    Type: Grant
    Filed: September 18, 2015
    Date of Patent: July 18, 2017
    Assignee: Sony Corporation
    Inventors: Satoshi Ogata, Rei Yoshikawa, Hiroaki Ebihara
  • Publication number: 20170195597
    Abstract: A method for reducing ADC time for dark signals starts with pixel array capturing image data of frames including first frame and second frame. Pixel array includes visible pixels and black pixels (OPB). Scanning circuitry then selects OPB of first frame to be readout. OPB generate a dark signal when selected by scanning circuitry. Column readout circuitry included in readout circuitry then acquires the dark signal of first frame and processes the dark signal based on a ramp signal received from ramp generator included in readout circuitry to generate dark ADC output. Readout circuitry then determines a ramp timing offset based on the dark signal of first frame. The ramp timing offset is then applied to the second frame, which includes generating by the ramp generator the ramp signal for a second frame that includes the ramp timing offset. Other embodiments are described.
    Type: Application
    Filed: December 30, 2015
    Publication date: July 6, 2017
    Inventor: Hiroaki Ebihara
  • Patent number: 9671282
    Abstract: An imaging device includes an exposure control unit, a determination unit, and an illuminance calculation unit. The exposure control unit is configured to control a plurality of exposure times. The determination unit is configured to determine whether or not saturation occurs using at least one data item of a plurality of data items obtained during the plurality of exposure times. The illuminance calculation unit is configured to calculate, if the determination unit determines that the saturation occurs, an illuminance using a data item different from the at least one data item used in the determination.
    Type: Grant
    Filed: September 24, 2015
    Date of Patent: June 6, 2017
    Assignee: Sony Corporation
    Inventors: Kazuhide Namba, Youji Sakioka, Hiroaki Ebihara, Daisuke Yoshioka, Ryota Moriwaka
  • Patent number: 9661242
    Abstract: There is provided a solid state imaging apparatus including a pixel array in which a plurality of unit pixels are arranged two-dimensionally. Each pixel includes a photoelectric conversion element, a transfer transistor which transfers a charge accumulated in the photoelectric conversion element to floating diffusion, a reset transistor which resets the charge of the floating diffusion, and an output transistor which outputs the charge of the floating diffusion. The floating diffusion of at least one of the plurality of unit pixels is electrically connected via the output transistor.
    Type: Grant
    Filed: July 17, 2013
    Date of Patent: May 23, 2017
    Assignee: SONY CORPORATION
    Inventors: Takayuki Goto, Hiroaki Ebihara, Rei Yoshikawa, Koichi Okamoto
  • Patent number: 9648267
    Abstract: The present technology relates to an image sensor and a control method for an image sensor which are capable of measuring illuminance of each color in an image sensor. Each of a plurality of pixel units includes a pixel and a reset transistor, and the pixel includes a photoelectric converting unit that performs photoelectric conversion on light of a certain color incident through a color filter and a transfer transistor that transfers charges obtained by the photoelectric conversion of the photoelectric converting unit and is controllable for each color. According to control of the transfer transistor, the charges are read from the photoelectric converting unit through the transfer transistor and the reset transistor, and a voltage corresponding to the charges is supplied to an AD converting unit connected to the reset transistor. The present technology can be applied to, for example, an image sensor that photographs an image.
    Type: Grant
    Filed: February 3, 2016
    Date of Patent: May 9, 2017
    Assignee: Sony Semiconductor Solutions Corporation
    Inventors: Koichi Okamoto, Rei Yoshikawa, Hiroaki Ebihara
  • Publication number: 20170085815
    Abstract: A solid-state image pickup device includes a pixel unit in which a plurality of photoelectric conversion elements having different sensitivities are arranged; and a pixel reading unit configured to read and add output signals from the plurality of photoelectric conversion elements in the pixel unit, and to obtain an output signal seemingly from one pixel. The pixel unit includes an absorbing unit configured to absorb overflowing electric charge from a photoelectric conversion element with a high sensitivity.
    Type: Application
    Filed: November 30, 2016
    Publication date: March 23, 2017
    Inventors: Eiichi Funatsu, Hiroaki Ebihara, Yoshiharu Kudoh
  • Patent number: 9525835
    Abstract: A solid-state image pickup device including a pixel unit in which a plurality of photoelectric conversion elements having different sensitivities are arranged; and a pixel reading unit configured to read and add output signals from the plurality of photoelectric conversion elements in the pixel unit, and to obtain an output signal seemingly from one pixel. The pixel unit includes an absorbing unit configured to absorb overflowing electric charge from a photoelectric conversion element with a high sensitivity.
    Type: Grant
    Filed: July 23, 2013
    Date of Patent: December 20, 2016
    Assignee: Sony Corporation
    Inventors: Eiichi Funatsu, Hiroaki Ebihara, Yoshiharu Kudoh
  • Publication number: 20160150172
    Abstract: The present technology relates to an image sensor and a control method for an image sensor which are capable of measuring illuminance of each color in an image sensor. Each of a plurality of pixel units includes a pixel and a reset transistor, and the pixel includes a photoelectric converting unit that performs photoelectric conversion on light of a certain color incident through a color filter and a transfer transistor that transfers charges obtained by the photoelectric conversion of the photoelectric converting unit and is controllable for each color. According to control of the transfer transistor, the charges are read from the photoelectric converting unit through the transfer transistor and the reset transistor, and a voltage corresponding to the charges is supplied to an AD converting unit connected to the reset transistor. The present technology can be applied to, for example, an image sensor that photographs an image.
    Type: Application
    Filed: February 3, 2016
    Publication date: May 26, 2016
    Inventors: Koichi Okamoto, Rei Yoshikawa, Hiroaki Ebihara