Patents by Inventor Yukihito Iida

Yukihito Iida 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: 20140218271
    Abstract: Disclosed herein is a display apparatus has a pixel array section including: pixel circuits which are each provided with a driving transistor and an electro-optical device and are laid out to form a matrix; and a draw wire provided in each of the pixel circuits to serve as a wire connecting the driving transistor to a power-supply providing line, wherein the resistance of the draw wire is relatively large in the pixel circuit close to a source applying a power-supply voltage to the power-supply providing line.
    Type: Application
    Filed: April 4, 2014
    Publication date: August 7, 2014
    Applicant: SONY CORPORATION
    Inventors: Takayuki Taneda, Katsuhide Uchino, Yukihito Iida
  • Publication number: 20140210871
    Abstract: A pixel circuit includes: a switching transistor whose conduction is controlled by a drive signal supplied to the control terminal; a drive wiring adapted to propagate the drive signal; and a data wiring adapted to propagate a data signal. The drive wiring is formed on a first wiring layer and connected to the control terminal of the switching transistor. The data wiring is formed on a second wiring layer and connected to a first terminal of the switching transistor. A multi-layered wiring structure is used so that the second wiring layer is formed on a layer different from that on which the first wiring layer is formed.
    Type: Application
    Filed: March 31, 2014
    Publication date: July 31, 2014
    Applicant: Sony Corporation
    Inventors: Tetsuo Minami, Yukihito Iida, Katsuhide Uchino
  • Publication number: 20140209917
    Abstract: A display device comprises a first pixel circuit and a second pixel circuit adjacent to the first pixel circuit along a first direction. The first pixel circuit includes a first transistor and a first electro-optic element, and the second pixel circuit includes a second transistor and a second electro-optic element. A power supply line extends along the first direction. A connection wiring is connected between the first transistor and the second transistor, and is connected to the power supply line via a contact portion having at least two contact holes.
    Type: Application
    Filed: April 2, 2014
    Publication date: July 31, 2014
    Applicant: SONY CORPORATION
    Inventors: Takayuki Taneda, Katsuhide Uchino, Yukihito Iida
  • Publication number: 20140204004
    Abstract: A display device includes a pixel array unit having pixels disposed in a matrix shape, each pixel including an electro-optical element, a write transistor for sampling and writing an input signal voltage, a holding capacitor for holding a signal voltage written by the write transistor, and a driver transistor for driving the electro-optical element in response to the signal voltage held in the holding capacitor. The display device further includes a scan circuit for selectively scanning each pixel in the pixel array unit at a row unit basis, and a plurality of power source supply scan circuits for selectively supplying a first potential and a second potential lower than the first potential to power supply line wired per each pixel row of the pixel array unit to supply current to the driver transistors, synchronously with scanning by the scan circuit.
    Type: Application
    Filed: March 19, 2014
    Publication date: July 24, 2014
    Applicant: Sony Corporation
    Inventors: Masatsugu Tomida, Yukihito Iida, Katsuhide Uchino
  • Patent number: 8760372
    Abstract: The display device including a pixel circuit has a first line, a transistor, a light emitting element, and a second line. The transistor is located between the second line and an electrode of the light emitting element. Either the first line or the second line is wired in a region that overlaps a light emitting region of the light emitting element in a lamination direction of layers. The second line intersects the first line outside of the light emitting region and overlaps a non-light emitting region of the light emitting element.
    Type: Grant
    Filed: November 1, 2012
    Date of Patent: June 24, 2014
    Assignee: Sony Corporation
    Inventors: Yukihito Iida, Akitsuna Takagi, Katsuhide Uchino
  • Patent number: 8743029
    Abstract: Disclosed herein is a display device including a pixel array unit, a first scanning circuit, a second scanning circuit and a selecting circuit.
    Type: Grant
    Filed: May 19, 2008
    Date of Patent: June 3, 2014
    Assignee: Sony Corporation
    Inventors: Takao Tanikame, Yukihito Iida, Tetsuo Minami, Katsuhide Uchino
  • Patent number: 8736522
    Abstract: A display device, including: a pixel array portion having pixel circuits disposed in a matrix, each of the pixel circuits including a drive transistor for generating a drive current, and an electro-optic element connected to an output terminal of the drive transistor, and power source supply lines as scanning lines through which pulse-like power source voltages are supplied to power source supply terminals of the drive transistors, respectively, wired therein; wherein power source contact portions through which the corresponding one of the power source supply terminals and the corresponding one of the power source supply lines are connected to each other are provided at predetermined distances from one another in a plurality of portions every drive transistor.
    Type: Grant
    Filed: April 30, 2009
    Date of Patent: May 27, 2014
    Assignee: Sony Corporation
    Inventors: Takayuki Taneda, Katsuhide Uchino, Yukihito Iida
  • Patent number: 8730136
    Abstract: Disclosed herein is a display apparatus has a pixel array section including: pixel circuits which are each provided with a driving transistor and an electro-optical device and are laid out to form a matrix; and a draw wire provided in each of the pixel circuits to serve as a wire connecting the driving transistor to a power-supply providing line, wherein the resistance of the draw wire is relatively large in the pixel circuit close to a source applying a power-supply voltage to the power-supply providing line.
    Type: Grant
    Filed: November 21, 2012
    Date of Patent: May 20, 2014
    Assignee: Sony Corporation
    Inventors: Takayuki Taneda, Katsuhide Uchino, Yukihito Iida
  • Patent number: 8730134
    Abstract: A pixel circuit includes: a switching transistor whose conduction is controlled by a drive signal supplied to the control terminal; a drive wiring adapted to propagate the drive signal; and a data wiring adapted to propagate a data signal. The drive wiring is formed on a first wiring layer and connected to the control terminal of the switching transistor. The data wiring is formed on a second wiring layer and connected to a first terminal of the switching transistor. A multi-layered wiring structure is used so that the second wiring layer is formed on a layer different from that on which the first wiring layer is formed.
    Type: Grant
    Filed: September 6, 2011
    Date of Patent: May 20, 2014
    Assignee: Sony Corporation
    Inventors: Tetsuo Minami, Yukihito Iida, Katsuhide Uchino
  • Patent number: 8730135
    Abstract: A self-luminous display panel driving method for driving a self-luminous display panel of the active matrix driving type, includes the step of executing threshold value correction operation for a driving transistor divisionally in a plurality of periods within at least one of which, after a point of time of an end of a preceding correction period till a point of time of a start of a succeeding correction period, a potential to be applied to the drain electrode of the driving transistor is controlled to an intermediate potential between a first potential for lighting driving of the driving transistor and a second potential for initialization applied within a preparation period of the first one of the correction periods.
    Type: Grant
    Filed: November 2, 2011
    Date of Patent: May 20, 2014
    Assignee: Sony Corporation
    Inventors: Yukihito Iida, Yutaka Mitomi, Mitsuru Asano, Tetsuo Minami, Takao Tanikame, Katsuhide Uchino
  • Patent number: 8692748
    Abstract: A display device comprises a pixel array unit including a plurality of pixels, and power supply lines and a power supply scanner for supplying a power supply voltage switching between first and second potentials to each of the power supply lines, wherein each of the pixels includes a light emitting element, a sampling transistor, a driver transistor, and a holding capacitor. The sampling transistor samples a signal potential to be held in the holding capacitor, the driver transistor receives a supply of a current from the power supply scanner through the power supply line at a first potential and flows a drive current to the light emitting element in accordance with the held signal potential, and the power supply scanner changes the power supply line from the first potential to the second potential before the sampling transistors samples the signal potential.
    Type: Grant
    Filed: August 13, 2013
    Date of Patent: April 8, 2014
    Assignee: Sony Corporation
    Inventors: Yukihito Iida, Katsuhide Uchino
  • Patent number: 8659522
    Abstract: In a display apparatus, as shown in FIG. 1, by using a reference signal, a shift register and a logical operation circuit generate a driving signal in periods for correcting a threshold voltage based on a rectangular wave signal. Also by using the reference signal, a write signal in a mobility correcting period is generated by an inverter, a NAND circuit, a level conversion circuit, a buffer circuit, a driving power generating unit, and a low-pass filter including a resistor and a capacitor. The signals are separately generated and are selectively output. Thus, excessive or insufficient mobility correction based on emission brightness can be prevented.
    Type: Grant
    Filed: May 16, 2011
    Date of Patent: February 25, 2014
    Assignee: Sony Corporation
    Inventors: Yutaka Mitomi, Yukihito Iida, Takao Tanikame, Katsuhide Uchino
  • Patent number: 8659515
    Abstract: A display device is disclosed. The display device includes: a pixel array portion and a driver portion for driving the pixel array portion. The pixel array portion has rows of scanning lines, columns of signal lines, pixels arranged in rows and columns at intersections of the scanning lines and the signal lines, and power lines disposed in a corresponding manner to the rows of the pixels. The driver portion includes a main scanner, a power-supply scanner, and a signal selector. Each of the pixels includes light-emitting devices, a sampling transistor, a driving transistor, a retaining capacitor.
    Type: Grant
    Filed: October 27, 2011
    Date of Patent: February 25, 2014
    Assignee: Sony Corporation
    Inventors: Yukihito Iida, Katsuhide Uchino, Tetsuro Yamamoto
  • Publication number: 20140049456
    Abstract: A display device including: a pixel array section; power supply lines; and auxiliary electrodes, wherein each pixel has an auxiliary capacitance, and one of electrodes of the auxiliary capacitance is connected to the source electrode of the drive transistor, and another electrode is connected to the auxiliary electrode for the pixel.
    Type: Application
    Filed: October 30, 2013
    Publication date: February 20, 2014
    Applicant: Sony Corporation
    Inventors: Yukihito Iida, Tetsuo Minami, Takao Tanikame, Katsuhide Uchino
  • Publication number: 20130328752
    Abstract: A display device comprises a pixel array unit including a plurality of pixels, and power supply lines and a power supply scanner for supplying a power supply voltage switching between first and second potentials to each of the power supply lines, wherein each of the pixels includes a light emitting element, a sampling transistor, a driver transistor, and a holding capacitor. The sampling transistor samples a signal potential to be held in the holding capacitor, the driver transistor receives a supply of a current from the power supply scanner through the power supply line at a first potential and flows a drive current to the light emitting element in accordance with the held signal potential, and the power supply scanner changes the power supply line from the first potential to the second potential before the sampling transistors samples the signal potential.
    Type: Application
    Filed: August 13, 2013
    Publication date: December 12, 2013
    Applicant: SONY CORPORATION
    Inventors: Yukihito Iida, Katsuhide Uchino
  • Publication number: 20130320847
    Abstract: A display device including a pixel array unit having a matrix of pixels each configured such that an anode electrode of an organic electroluminescent element is connected to a source electrode of a drive transistor, a gate electrode of the drive transistor is connected to a source or drain electrode of a writing transistor, and a storage capacitor is connected between the gate and source electrodes of the drive transistor, scanning lines and power supply lines for individual pixel rows, and signal lines for individual pixel columns. A video signal reference potential is supplied to the signal lines for a period during which a scanning signal is supplied to the scanning lines during driving of pixels in a preceding row. During threshold correction for the drive transistor in a current pixel, the video signal reference potential and a potential of the cathode electrode of the organic electroluminescent element are equal.
    Type: Application
    Filed: June 25, 2013
    Publication date: December 5, 2013
    Applicant: SONY CORPORATION
    Inventors: Yukihito Iida, Mitsuru Asano, Katsuhide Uchino
  • Patent number: 8570245
    Abstract: A display device includes a pixel array unit having a matrix of pixels each configured such that an anode electrode of an organic electroluminescent element is connected to a source electrode of a drive transistor, a gate electrode of the drive transistor is connected to a source or drain electrode of a writing transistor, and a storage capacitor is connected between the gate and source electrodes of the drive transistor, scanning lines and power supply lines for individual pixel rows, and signal lines for individual pixel columns. A video signal reference potential is supplied to the signal lines for a period during which a scanning signal is supplied to the scanning lines during driving of pixels in a preceding row. During threshold correction for the drive transistor in a current pixel, the video signal reference potential and a potential of the cathode electrode of the organic electroluminescent element are equal.
    Type: Grant
    Filed: December 7, 2009
    Date of Patent: October 29, 2013
    Assignee: Sony Corporation
    Inventors: Yukihito Iida, Mitsuru Asano, Katsuhide Uchino
  • Patent number: 8552937
    Abstract: A pixel circuit includes: a switching transistor whose conduction is controlled by a drive signal supplied to the control terminal; a drive wiring adapted to propagate the drive signal; and a data wiring adapted to propagate a data signal. The drive wiring is formed on a first wiring layer and connected to the control terminal of the switching transistor. The data wiring is formed on a second wiring layer and connected to a first terminal of the switching transistor. A multi-layered wiring structure is used so that the second wiring layer is formed on a layer different from that on which the first wiring layer is formed.
    Type: Grant
    Filed: October 4, 2012
    Date of Patent: October 8, 2013
    Assignee: Sony Corporation
    Inventors: Tetsuo Minami, Yukihito Iida, Katsuhide Uchino
  • Patent number: 8547308
    Abstract: A display device comprises a pixel array unit including a plurality of pixels, and power supply lines and a power supply scanner for supplying a power supply voltage switching between first and second potentials to each of the power supply lines, wherein each of the pixels includes a light emitting element, a sampling transistor, a driver transistor, and a holding capacitor. The sampling transistor samples a signal potential to be held in the holding capacitor, the driver transistor receives a supply of a current from the power supply scanner through the power supply line at a first potential and flows a drive current to the light emitting element in accordance with the held signal potential, and the power supply scanner changes the power supply line from the first potential to the second potential before the sampling transistors samples the signal potential.
    Type: Grant
    Filed: May 20, 2011
    Date of Patent: October 1, 2013
    Assignee: Sony Corporation
    Inventors: Yukihito Iida, Katsuhide Uchino
  • Patent number: 8547371
    Abstract: Prior to increasing the voltage level of an input signal to be sampled in a step-by-step manner and writing a signal voltage Vsig at a desired voltage level, a precharge is performed which writes a precharge voltage Vpre, lower than the signal voltage Vsig, so as to apply the same voltage Vpre to the gate of a drive transistor in advance. This not only provides a reduced gate-to-source voltage of the drive transistor at the time of writing of the signal voltage Vsig but also extends a mobility correction time required for a mobility correction operation. The extension of the mobility correction time required for the mobility correction operation ensures a relatively smaller variation in the correction time, thus suppressing the variation in brightness. The extension also permits a write pulse to be set to the optimal pulse width.
    Type: Grant
    Filed: January 7, 2008
    Date of Patent: October 1, 2013
    Assignee: Sony Corporation
    Inventors: Takao Tanikame, Yukihito Iida, Tetsuo Minami, Katsuhide Ucnino