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).

  • Publication number: 20150332657
    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: July 23, 2015
    Publication date: November 19, 2015
    Inventors: Tetsuro Yamamoto, Katsuhide Uchino, Masakazu Kato
  • Publication number: 20150302800
    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 1, 2015
    Publication date: October 22, 2015
    Applicant: Sony Corporation
    Inventors: Katsuhide UCHINO, Juichi Yamashita, Tetsuro Yamamoto
  • Publication number: 20150294623
    Abstract: A display unit includes: a unit pixel; a switch configured to perform ON-OFF control between a second terminal and a third terminal, based on a pulse signal applied to a first terminal, the second terminal being supplied with a DC signal, and the third terminal being connected to the unit pixel; and a non-linear element interposed between the first terminal and the third terminal.
    Type: Application
    Filed: December 18, 2013
    Publication date: October 15, 2015
    Applicant: JOLED INC.
    Inventors: Naobumi Toyomura, Tetsuro Yamamoto
  • Patent number: 9147358
    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: December 16, 2014
    Date of Patent: September 29, 2015
    Assignee: SONY CORPORATION
    Inventors: Katsuhide Uchino, Junichi Yamashita, Tetsuro Yamamoto
  • Patent number: 9142604
    Abstract: A display device including a pixel array having a plurality of pixels arranged in a matrix form, each of the pixels including a sampling transistor configured to sample a data potential from a video signal line which is insulated from and intersects a control line in response to the change in potential of the control line, and a light-emitting element configured to emit light at the brightness commensurate with the magnitude of the post-sampling data potential.
    Type: Grant
    Filed: December 2, 2014
    Date of Patent: September 22, 2015
    Assignee: SONY CORPORATION
    Inventors: Tetsuro Yamamoto, Katsuhide Uchino
  • Patent number: 9129928
    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: November 25, 2014
    Date of Patent: September 8, 2015
    Assignee: Sony Corporation
    Inventors: Tetsuro Yamamoto, Katsuhide Uchino
  • Publication number: 20150235592
    Abstract: A display device includes: a plurality of light-emitting elements, each light-emitting element having a light-emitting unit and a driving circuit for driving the light-emitting unit. The driving circuit at least includes (A) a drive transistor having source/drain regions, a channel forming region, and a gate electrode, (B) a video signal write transistor having source/drain regions, a channel forming region, and a gate electrode, and (C) a capacitive unit. In the drive transistor, (A-1) one of the source/drain regions is connected to the corresponding current supply line, (A-2) the other region of the source/drain regions is connected to the light-emitting unit and connected to one end of the capacitive unit, and forms a second node, and (A-3) the gate electrode is connected to the other region of the source/drain regions of the video signal write transistor and connected to the other end of the capacitive unit, and forms a first node.
    Type: Application
    Filed: May 5, 2015
    Publication date: August 20, 2015
    Inventors: Junichi Yamashita, Yusuke Onoyama, Tetsuo Minami, Naobumi Toyomura, Tetsuro Yamamoto, Katsuhide Uchino
  • Publication number: 20150221253
    Abstract: To provide a display device that can reduce image quality degradation caused by blunting of the waveform of the control pulse for controlling a sampling transistor, and an electronic apparatus including the display device. The display device according to an embodiment of this disclosure has a pixel circuit arranged therein, the pixel circuit including an electrooptic element, a drive transistor for driving the electrooptic element, and a first capacitative element connected between the gate electrode of the drive transistor and one of the source/drain electrodes of the drive transistor. The pixel circuit writes a video signal, and includes a timing circuit capable of adjusting the time for writing the video signal.
    Type: Application
    Filed: August 23, 2013
    Publication date: August 6, 2015
    Applicant: SONY CORPORATION
    Inventors: Tetsuro Yamamoto, Katsuhide Uchino
  • Patent number: 9099041
    Abstract: A display device includes pixel array unit and a driver unit. A sampling transistor samples a signal potential to hold the signal potential in a holding capacitor. A driver transistor flows a drive current to a light emitting element in accordance with the signal potential held. A main scanner in the driver unit outputs the control signal having a shorter pulse width than the time period to the scan line to make the sampling transistor conductive during a time period while the signal line is at the signal potential, thereby adding the signal potential a correction for a mobility of the driver transistor when the signal potential is held in the holding capacitor.
    Type: Grant
    Filed: January 17, 2013
    Date of Patent: August 4, 2015
    Assignee: Sony Corporation
    Inventors: Yukihito Iida, Tetsuro Yamamoto, Katsuhide Uchino
  • Patent number: 9082345
    Abstract: A display device according to the present invention includes pixel units. Each of the pixel units is made up of N consecutive pixels. One of N (N?3) colors including R (red), G (green) and B (blue) is assigned to each of the N pixels. Each of the N pixels includes a sampling transistor Ms, drive transistor Md, holding capacitor Cs and light-emitting element (organic light-emitting diode OLED). Of the N pixels, a specific color pixel that is susceptible to a dark dot (e.g., B) or that has the highest relative luminosity factor (e.g., G) has more sets of pixel circuit elements including the drive transistor Md, holding capacitor Cs and organic light-emitting diode OLED than other color pixels and has two or more sets thereof.
    Type: Grant
    Filed: March 5, 2009
    Date of Patent: July 14, 2015
    Assignee: JOLED INC.
    Inventors: Tetsuro Yamamoto, Katsuhide Uchino
  • Patent number: 9076384
    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: July 29, 2014
    Date of Patent: July 7, 2015
    Assignee: SONY CORPORATION
    Inventors: Katsuhide Uchino, Junichi Yamashita, Tetsuro Yamamoto
  • Publication number: 20150179709
    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: February 9, 2015
    Publication date: June 25, 2015
    Applicant: SONY CORPORATION
    Inventors: Takayuki Taneda, Tetsuro Yamamoto, Katsuhide Uchino
  • Publication number: 20150179100
    Abstract: An electroluminescent display panel has pixel circuits for an active matrix driving system. At least one of the pixel circuits has a thin-film transistor in which a portion of a pattern of a metal wiring material above a channel layer of the thin-film transistor is disposed to shield the channel region of the thin-film transistor.
    Type: Application
    Filed: March 6, 2015
    Publication date: June 25, 2015
    Inventors: Junichi Yamashita, Tetsuro Yamamoto, Katsuhide Uchino
  • Patent number: 9059122
    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: August 7, 2014
    Date of Patent: June 16, 2015
    Assignee: Sony Corporation
    Inventors: Takayuki Taneda, Tetsuro Yamamoto, Katsuhide Uchino
  • Publication number: 20150154911
    Abstract: Provided is a drive circuit that includes a scanning circuit configured to perform a first vertical scanning and a second vertical scanning on each of first and second display regions, adjacent to each other in a vertical direction in a display region including pixels, individually in one frame. The first vertical scanning causes light emission of each pixel to be performed, and the second vertical scanning causes light extinction of each pixel to be performed. The scanning circuit is configured to perform the first vertical scanning and the second vertical scanning to cause timing of starting the light emission of an n+1th frame for a first scanned row, adjacent to the first display region, in the second display region to be later than timing of ending the light emission of an n-th frame for a final scanned row, adjacent to the second display region, in the first display region.
    Type: Application
    Filed: November 12, 2014
    Publication date: June 4, 2015
    Inventors: Naobumi Toyomura, Tetsuro Yamamoto
  • Publication number: 20150154937
    Abstract: A color signal processing circuit of the present disclosure includes: a correction signal generation unit which generates, on the basis of a signal level of a color signal corresponding to one primary color among color signals corresponding to a plurality of primary colors being input, a correction signal for chromaticity of a color signal corresponding to another primary color as a difference value from a signal level of each color signal corresponding to predetermined chromaticity; and a correction unit which uses the correction signal generated by the correction signal generation unit to correct the color signal corresponding to the other primary color.
    Type: Application
    Filed: June 20, 2013
    Publication date: June 4, 2015
    Applicant: SONY CORPORATION
    Inventors: Yohei Funatsu, Yasuo Inoue, Tomoya Yano, Ryo Ogawa, Shoji Araki, Hidehisa Shimizu, Tetsuro Yamamoto, Yuki Seo, Takashi Uchida
  • Patent number: 9041628
    Abstract: A display device includes: a plurality of light-emitting elements, each light-emitting element having a light-emitting unit and a driving circuit for driving the light-emitting unit. The driving circuit at least includes (A) a drive transistor having source/drain regions, a channel forming region, and a gate electrode, (B) a video signal write transistor having source/drain regions, a channel forming region, and a gate electrode, and (C) a capacitive unit. In the drive transistor, (A-1) one of the source/drain regions is connected to the corresponding current supply line, (A-2) the other region of the source/drain regions is connected to the light-emitting unit and connected to one end of the capacitive unit, and forms a second node, and (A-3) the gate electrode is connected to the other region of the source/drain regions of the video signal write transistor and connected to the other end of the capacitive unit, and forms a first node.
    Type: Grant
    Filed: August 17, 2012
    Date of Patent: May 26, 2015
    Assignee: Sony Corporation
    Inventors: Junichi Yamashita, Yusuke Onoyama, Tetsuo Minami, Naobumi Toyomura, Tetsuro Yamamoto, Katsuhide Uchino
  • Patent number: 9035936
    Abstract: A level shifter circuit, wherein a first and a second transistor circuit are connected serially, a third and a fourth transistor circuit are connected serially; a first input voltage is applied to the second transistor circuit and a second input voltage is applied to the fourth transistor circuit; an input terminal of the first transistor circuit is connected to an output terminal of the third and the fourth transistor circuits, and an input terminal of the third transistor circuit is connected to an output terminal of the first and the second transistor circuits; two transistor circuits of at least one side of two transistor circuits of a first fixed power source side and two transistor circuits of a second fixed power source side are configured of double gate transistors; and the level shifter circuit has a switch element for applying a voltage to a common connection node.
    Type: Grant
    Filed: October 31, 2014
    Date of Patent: May 19, 2015
    Assignee: Sony Corporation
    Inventors: Tetsuro Yamamoto, Katsuhide Uchino
  • Publication number: 20150129903
    Abstract: A display device including a pixel array having a plurality of pixels arranged in a matrix form, each of the pixels including a sampling transistor configured to sample a data potential from a video signal line which is insulated from and intersects a control line in response to the change in potential of the control line, and a light-emitting element configured to emit light at the brightness commensurate with the magnitude of the post-sampling data potential.
    Type: Application
    Filed: December 2, 2014
    Publication date: May 14, 2015
    Inventors: Tetsuro Yamamoto, Katsuhide Uchino
  • Patent number: 9024929
    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: August 14, 2014
    Date of Patent: May 5, 2015
    Assignee: Sony Corporation
    Inventors: Katsuhide Uchino, Tetsuro Yamamoto, Junichi Yamashita