Patents by Inventor Tetsuro Yamamoto

Tetsuro Yamamoto 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).

  • DISPLAY UNIT
    Publication number: 20140346490
    Abstract: A display unit with which lowering of long-term reliability of a transistor is decreased is provided. The display unit includes a display section having a plurality of organic EL devices with light emitting color different from each other and a plurality of pixel circuits that are singly provided for every said organic EL device for every pixel. The pixel circuit has a first transistor for writing a video signal, a second transistor for driving the organic EL device based on the video signal written by the first transistor, and a retentive capacity, and out of the first transistor and the second transistor, a third transistor provided correspondingly to a second organic EL device adjacent to a first organic EL device is arranged farther from the first organic EL device than a first retentive capacity provided correspondingly to the second organic EL device out of the retentive capacity.
    Type: Application
    Filed: August 7, 2014
    Publication date: November 27, 2014
    Inventors: Takayuki Taneda, Tetsuro Yamamoto, Katsuhide Uchino
  • Display device and method for driving the same
    Patent number: 8896502
    Abstract: A display device includes a display unit, a horizontal drive circuit, and a vertical drive circuit, the display unit including pixels in a matrix formation, as well as respective signal lines and scan lines via which the drive circuits drive the pixels. Each pixel includes a light-emitting element, a hold capacitor, a write transistor, and a drive transistor. Mobility fluctuations in the drive transistor are compensated for by successively setting the voltage of the signal line to an intermediate voltage and to a tone voltage. In addition, the intermediate voltage is varied in accordance with the tone voltage as well as with the distance from the input terminal of a write signal to a respective pixel. The device thereby compensates for mobility fluctuations in the drive transistor and prevents shading due to irregularities in the waveform of the write signal.
    Type: Grant
    Filed: May 9, 2008
    Date of Patent: November 25, 2014
    Assignee: Sony Corporation
    Inventors: Naobumi Toyomura, Katsuhide Uchino, Tetsuro Yamamoto
  • Display apparatus and electronic apparatus
    Patent number: 8896642
    Abstract: Disclosed herein is a display apparatus, including: a plurality of subpixels disposed adjacent each other and forming one pixel which forms a unit for formation of a color image; the plurality of subpixels including a first subpixel which emits light of the shortest wavelength and a second subpixel disposed adjacent the first subpixel; the second subpixel having a light blocking member disposed between the second subpixel and the first subpixel and having a width greater than a channel length or a channel width of a transistor which forms the second subpixel.
    Type: Grant
    Filed: October 16, 2013
    Date of Patent: November 25, 2014
    Assignee: Sony Corporation
    Inventors: Tetsuro Yamamoto, Katsuhide Uchino
  • ELECTROLUMINESCENT DISPLAY PANEL AND ELECTRONIC DEVICE
    Publication number: 20140340378
    Abstract: An EL display panel including: a pixel array section in which EL display elements whose light emission state is controlled by an active matrix driving system are arranged in a form of a matrix; a first writing control line driving section and a second writing control line driving section configured to drive each writing control line from both sides of the pixel array section; and a first power supply line driving section and a second power supply line driving section configured to drive a power supply line disposed along a direction of a horizontal line from both sides of the pixel array section, the first power supply line driving section and the second power supply line driving section being respectively arranged between the first writing control line driving section and the pixel array section and between the second writing control line driving section and the pixel array section.
    Type: Application
    Filed: August 4, 2014
    Publication date: November 20, 2014
    Inventors: Tetsuro Yamamoto, Katsuhide Uchino, Masakazu Kato
  • ELECTRIC/ELECTRONIC COMPONENT USING FLAME-RETARDANT POLYESTER-BASED RESIN COMPOSITION
    Publication number: 20140336326
    Abstract: An object of the invention is to provide an electric/electronic component including a flame-retardant polyester-based resin composition, which uses no halogen-based flame retardant, has high flame retardancy, and can withstand long-term continuous use at high temperature. The electric/electronic component includes a flame-retardant polyester-based resin composition containing 100 parts by weight of a thermoplastic polyester-based resin (A), 5 to 80 parts by weight of a polymer-type organophosphorus flame retardant (B) whose main chain has a polyester structure, 1 to 20 parts by weight of an amorphous thermoplastic super engineering plastic (C), 5 to 120 parts by weight of a fibrous inorganic compound (D), and 5 to 50 parts by weight of a non-fibrous inorganic compound (E).
    Type: Application
    Filed: October 26, 2012
    Publication date: November 13, 2014
    Applicant: KANEKA CORPORATION
    Inventors: Tetsuro Yamamoto, Kazunori Saegusa
  • PIXEL CIRCUIT AND DISPLAY DEVICE
    Publication number: 20140333212
    Abstract: A pixel circuit able to prevent a spread of the terminal voltages of drive transistors inside a panel and in turn able to reliably prevent deterioration of uniformity, wherein a source of a TFT serving as a drive transistor is connected to an anode of a light emitting element, a drain is connected to a power source potential, a capacitor is connected between a gate and source of the TFT, and a source potential of the TFT is connected to a fixed potential through a TFT serving as a switch transistor and wherein pixel circuit lines are connected by an upper line and bottom line and are arranged in parallel with pixel circuit power source voltage lines so as not to have intersecting parts.
    Type: Application
    Filed: July 29, 2014
    Publication date: November 13, 2014
    Applicant: SONY CORPORATION
    Inventors: Katsuhide UCHINO, Junichi Yamashita, Tetsuro Yamamoto
  • Buffer circuit, scanning circuit, display device, and electronic equipment
    Patent number: 8884863
    Abstract: A buffer circuit includes a first transistor circuit having a first conductivity type transistor, a second transistor circuit having a second conductivity type transistors, in which the first and second transistor circuits are serially connected between a first fixed power supply and a second fixed power supply, and input terminals and output terminals of each of the first and second transistor circuits are connected in common respectively, in which at least one transistor circuit of the first transistor circuit and the second transistor circuit is a double gate transistor, and in which wherein a switch element, when any one transistor circuit of the first and the second transistor circuits is in an operating state, is included to supply a voltage of a third fixed power supply to a common connection node of the double gate transistor of the other transistor circuit.
    Type: Grant
    Filed: October 31, 2012
    Date of Patent: November 11, 2014
    Assignee: Sony Corporation
    Inventors: Tetsuro Yamamoto, Katsuhide Uchino
  • Display, method for driving display, and electronic apparatus
    Patent number: 8884854
    Abstract: Disclosed herein is a display including: a pixel array part configured to include pixels arranged in a matrix, each of the pixels including an electro-optical element, a write transistor for sampling and writing an input signal voltage supplied through a signal line, a holding capacitor for holding the input signal voltage written by the write transistor, and a drive transistor for driving the electro-optical element based on the input signal voltage held in the holding capacitor.
    Type: Grant
    Filed: March 28, 2008
    Date of Patent: November 11, 2014
    Assignee: Sony Corporation
    Inventors: Takayuki Taneda, Tetsuro Yamamoto, Katsuhide Uchino
  • Display device having a pixel that synthesizes signal values to increase a number of possible display gradations and display method
    Patent number: 8884852
    Abstract: Disclosed herein is a display device including: a pixel circuit for generating a signal value for display by synthesizing signal values input within one horizontal period, and making display at a gradation corresponding to the signal value for display; a signal line disposed in a form of a column on a pixel array where the pixel circuit is arranged in a form of a matrix; a scanning line disposed in a form of a row on the pixel array; a signal line driving section configured to output signal values as a signal value to be supplied to each pixel circuit to the signal line within one horizontal period; and a scanning line driving section configured to sequentially introduce the signal values within one horizontal period, the signal values being generated in the signal line, into the pixel circuit in each row by driving the scanning line.
    Type: Grant
    Filed: April 5, 2010
    Date of Patent: November 11, 2014
    Assignee: Sony Corporation
    Inventors: Tetsuro Yamamoto, Katsuhide Uchino
  • Signal processing apparatus, display apparatus, electronic apparatus, signal processing method and program
    Patent number: 8884993
    Abstract: Disclosed herein is a signal processing apparatus, including: a luminance degradation information production section adapted to produce luminance degradation information regarding degradation of a luminance in accordance with a temperature condition upon emission; a luminance degradation value calculation section adapted to calculate a luminance degradation value regarding degradation of the luminance for each pixel circuit; and a correction section adapted to correct the gradation value of an image signal to be inputted to the pixel circuit based on the luminance degradation value.
    Type: Grant
    Filed: March 21, 2011
    Date of Patent: November 11, 2014
    Assignee: Sony Corporation
    Inventors: Junichi Yamashita, Hiroshi Hasegawa, Kazuo Nakamura, Tetsuro Yamamoto, Katsuhide Uchino
  • PIXEL CIRCUIT, DISPLAY DEVICE, AND METHOD OF DRIVING PIXEL CIRCUIT
    Publication number: 20140327665
    Abstract: A pixel circuit, display device, and method of driving a pixel circuit enabling source-follower output with no deterioration of luminance even with a change of the current-voltage characteristic of the light emitting element along with elapse, enabling a source-follower circuit of n-channel transistors, and able to use an n-channel transistor as an EL drive transistor while using current anode-cathode electrodes, wherein a source of a TFT 111 as a drive transistor is connected to an anode of a light emitting element 114, a drain is connected to a power source potential VCC, a capacitor C111 is connected between a gate and source of the TFT 111, and a source potential of the TFT 111 is connected to a fixed potential through a TFT 113 as a switching transistor.
    Type: Application
    Filed: July 15, 2014
    Publication date: November 6, 2014
    Applicant: Sony Corporation
    Inventors: Katsuhide UCHINO, Junichi YAMASHITA, Tetsuro YAMAMOTO
  • EL display panel, electronic apparatus and EL display panel driving method
    Patent number: 8860637
    Abstract: An electro luminescence display panel adopting an active-matrix driving method and including pixel circuits; a capacitor control line; a coupling capacitor; and a pulse voltage source.
    Type: Grant
    Filed: February 11, 2009
    Date of Patent: October 14, 2014
    Assignee: Sony Corporation
    Inventors: Tetsuro Yamamoto, Katsuhide Uchino
  • Display apparatus, pixel layout method for display apparatus, and electronic device
    Patent number: 8854283
    Abstract: In a display apparatus, a plurality of pixels are disposed in an array. Each pixel includes: an electro-optical element; a write transistor that writes a picture signal; a drive transistor that drives the electro-optical element according to the picture signal written by the write transistor; a hold capacitor, connected between the gate and source electrodes of the drive transistor, that holds the picture signal written by the write transistor; and an auxiliary capacitor, connected between the anode of the electro-optical element and a fixed potential node. Each auxiliary capacitor is formed straddling the boundary between specific pixel pairs adjacent in the pixel layout direction on a pixel row. An island metal pattern is formed between pixel pairs other than the specific pixel pairs, at a site corresponding to that of the auxiliary capacitor.
    Type: Grant
    Filed: November 16, 2009
    Date of Patent: October 7, 2014
    Assignee: Sony Corporation
    Inventors: Tetsuro Yamamoto, Katsuhide Uchino
  • Display, method for driving display, and electronic apparatus having parallel holding capacitors
    Patent number: 8847214
    Abstract: Disclosed herein is a display including: a pixel array part configured to include pixels that are arranged in a matrix and each have an electro-optical element, a write transistor for writing a video signal, a drive transistor for driving the electro-optical element based on the video signal written by the write transistor, and a holding capacitor connected between gate and source of the drive transistor, wherein the holding capacitor includes a first electrode, a second electrode disposed to face one surface of the first electrode for forming a first capacitor, and a third electrode disposed to face the other surface of the first electrode for forming a second capacitor, and the first capacitor and the second capacitor are connected in parallel to each other electrically.
    Type: Grant
    Filed: December 10, 2012
    Date of Patent: September 30, 2014
    Assignee: Sony Corporation
    Inventors: Hiroshi Sagawa, Katsuhide Uchino, Tetsuro Yamamoto
  • Display device, method for driving the same, and electronic unit
    Patent number: 8847999
    Abstract: A display device includes: a display section including a plurality of pixels each having a light emitting element and a pixel circuit; and a drive circuit performing display drive on the plurality of pixels through selecting each of the plurality of pixels to write a first signal voltage and a second signal voltage in this order into the selected pixel, the first and second signal voltages being provided based on a video signal. The drive circuit varies magnitude of each of the first and second signal voltages in accordance with a gray-scale value of the video signal, thereby performing gray-scale interpolation on a light emission luminance level for each of the light emitting elements.
    Type: Grant
    Filed: October 7, 2010
    Date of Patent: September 30, 2014
    Assignee: Sony Corporation
    Inventors: Naobumi Toyomura, Tetsuro Yamamoto, Katsuhide Uchino
  • Display unit having an arrangement of a retentive capacitor and an EL device of each pixel with respect to adjacent pixel for low light leakage among adjacent pixels
    Patent number: 8841672
    Abstract: A display unit with which lowering of long-term reliability of a transistor is decreased is provided. The display unit includes a display section having a plurality of organic EL devices with light emitting color different from each other and a plurality of pixel circuits that are singly provided for every said organic EL device for every pixel. The pixel circuit has a first transistor for writing a video signal, a second transistor for driving the organic EL device based on the video signal written by the first transistor, and a retentive capacity, and out of the first transistor and the second transistor, a third transistor provided correspondingly to a second organic EL device adjacent to a first organic EL device is arranged farther from the first organic EL device than a first retentive capacity provided correspondingly to the second organic EL device out of the retentive capacity.
    Type: Grant
    Filed: March 5, 2014
    Date of Patent: September 23, 2014
    Assignee: Sony Corporation
    Inventors: Takayuki Taneda, Tetsuro Yamamoto, Katsuhide Uchino
  • Pixel circuit and display device
    Patent number: 8836678
    Abstract: A pixel circuit able to prevent a spread of the terminal voltages of drive transistors inside a panel and in turn able to reliably prevent deterioration of uniformity, wherein a source of a TFT serving as a drive transistor is connected to an anode of a light emitting element, a drain is connected to a power source potential, a capacitor is connected between a gate and source of the TFT, and a source potential of the TFT is connected to a fixed potential through a TFT serving as a switch transistor and wherein pixel circuit lines are connected by an upper line and bottom line and are arranged in parallel with pixel circuit power source voltage lines so as not to have intersecting parts.
    Type: Grant
    Filed: March 6, 2012
    Date of Patent: September 16, 2014
    Assignee: Sony Corporation
    Inventors: Katsuhide Uchino, Junichi Yamashita, Tetsuro Yamamoto
  • Display device
    Patent number: 8830149
    Abstract: Disclosed herein is a display device that allows a vertical scanning line to be shared between a plurality of rows without increasing the number of control lines or control signals, the display device including pixel circuits; vertical scanning lines; and horizontal scanning lines.
    Type: Grant
    Filed: May 29, 2009
    Date of Patent: September 9, 2014
    Assignee: Sony Corporation
    Inventors: Tetsuro Yamamoto, Katsuhide Uchino
  • Display device and electronic apparatus
    Patent number: 8830218
    Abstract: A transistor connected to a power source for driving a light-emitting element driving transistor and a transistor setting to a predetermined voltage a source voltage of the light-emitting element driving transistor are commonly controlled by a control signal that takes one of three levels.
    Type: Grant
    Filed: October 28, 2013
    Date of Patent: September 9, 2014
    Assignee: Sony Corporation
    Inventors: Katsuhide Uchino, Tetsuro Yamamoto, Junichi Yamashita
  • PIXEL CIRCUIT, DISPLAY DEVICE, AND METHOD OF DRIVING PIXEL CIRCUIT
    Publication number: 20140247204
    Abstract: A pixel circuit, display device, and method of driving a pixel circuit enabling source-follower output with no deterioration of luminance even with a change of the current-voltage characteristic of the light emitting element along with elapse, enabling a source-follower circuit of n-channel transistors, and able to use an n-channel transistor as an EL drive transistor while using current anode-cathode electrodes, wherein a source of a TFT 111 as a drive transistor is connected to an anode of a light emitting element 114, a drain is connected to a power source potential VCC, a capacitor C111 is connected between a gate and source of the TFT 111, and a source potential of the TFT 111 is connected to a fixed potential through a TFT 113 as a switching transistor.
    Type: Application
    Filed: May 16, 2014
    Publication date: September 4, 2014
    Applicant: Sony Corporation
    Inventors: Katsuhide Uchino, Junichi Yamashita, Tetsuro Yamamoto