Patents by Inventor Mitsuru Asano

Mitsuru Asano 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: 8300038
    Abstract: Disclosed herein is a display apparatus including a pixel matrix section including pixel circuits laid out to form a pixel matrix to serve as pixel circuits each having an electro optical device, a signal writing transistor, a signal storage capacitor, and a device driving transistor, and a power-supply section configured to change a power-supply electric potential appearing on a power-supply line for providing a driving current flowing to the device driving transistor from one level to another in order to control transitions from a light emission period of the electro optical device to a no-light emission period of the electro optical device and vice versa, and stopping an operation to assert the power-supply electric potential on the power-supply line during a portion of the no-light emission period of the electro optical device.
    Type: Grant
    Filed: April 8, 2009
    Date of Patent: October 30, 2012
    Assignee: Sony Corporation
    Inventors: Masatsugu Tomida, Mitsuru Asano
  • Patent number: 8284131
    Abstract: A self-luminous display device includes: pixel circuits; and a drive signal generating circuit, wherein each of the pixel circuits includes a light-emitting diode, a drive transistor connected to a drive current path of the light-emitting diode, and a holding capacitor coupled to a control node of the drive transistor, and the drive signal generating circuit generates the drive signal containing a second level signal adapted to stop the light emission without reverse-biasing the light-emitting diode, a first level signal, lower than the second level signal, adapted to reverse-bias the light-emitting diode, and a third level signal, higher than the second level signal, adapted to enable the light-emitting diode to emit light, the drive signal generating circuit supplying the drive signal to the pixel circuits.
    Type: Grant
    Filed: January 7, 2009
    Date of Patent: October 9, 2012
    Assignee: Sony Corporation
    Inventors: Masatsugu Tomida, Mitsuru Asano
  • Publication number: 20120244775
    Abstract: A method for manufacturing a display device is provided. The method includes forming a circuit part; forming a planarization insulating layer on the circuit part; forming a separator in an area outside a display area in which a plurality of light emitting elements are formed by removing the planarization insulating layer at a position surrounding the display area; forming an electrically-conductive layer including a plurality of first electrodes and an auxiliary interconnect on the planarization insulating layer; forming an aperture-defining insulating layer that insulates the first electrodes from each other and has an aperture through which part of the first electrode is exposed; and forming a plurality of light emitting elements by stacking the first electrode, an organic layer, and a second electrode common to the plurality of light emitting elements.
    Type: Application
    Filed: June 7, 2012
    Publication date: September 27, 2012
    Applicant: SONY CORPORATION
    Inventors: Akiko Tsuji, Toshiki Matsumoto, Hirofumi Fujioka, Mitsuru Asano, Hiroshi Sagawa, Kiwamu Miura
  • Patent number: 8269696
    Abstract: Disclosed herein is an electroluminescence display panel including: a pixel circuit; a signal line; a scan line; a drive power supply line; a common power supply line; a power supply line drive circuit; a high-potential power supply line; and a low-potential power supply line.
    Type: Grant
    Filed: June 16, 2008
    Date of Patent: September 18, 2012
    Assignee: Sony Corporation
    Inventors: Masatsugu Tomida, Mitsuru Asano
  • Publication number: 20120176421
    Abstract: Herein disclosed a display apparatus including: a pixel array having a matrix of pixel circuits each including respective electrooptical elements for determining a display brightness level and respective drive circuits for driving the electrooptical elements; wherein adjacent two of the pixel circuits are paired with each other, and each of the drive circuits of the adjacent two pixel circuits includes at least one transistor having a low-concentration source/drain region or an offset region of an offset gate structure, the electrooptical elements and the drive circuits of the adjacent two pixel circuits being laid out such that a line interconnecting a drain region and a source region of the at least one transistor extends parallel to a direction of pixel columns of the pixel circuits of the pixel array.
    Type: Application
    Filed: March 13, 2012
    Publication date: July 12, 2012
    Applicant: Sony Corporation
    Inventors: Mitsuru Asano, Seiichiro Jinta, Masatsugu Tomida, Hiroshi Fujimura
  • Patent number: 8212258
    Abstract: Disclosed herein is a display device, including: a substrate; a circuit part configured to include a drive element formed over the substrate; a planarization insulating layer configured to be formed on the circuit part; an electrically-conductive layer configured to be formed on the planarization insulating layer and include a plurality of first electrodes and an auxiliary interconnect; an aperture-defining insulating layer configured to insulate the plurality of first electrodes from each other and have an aperture through which part of the first electrode is exposed; a plurality of light emitting elements configured to be formed by stacking the first electrode, an organic layer including a light emitting layer, and a second electrode in that order; and a separator configured to be formed by removing the planarization insulating layer at a position surrounding a display area in which the plurality of light emitting elements connected to the drive element are disposed.
    Type: Grant
    Filed: October 7, 2010
    Date of Patent: July 3, 2012
    Assignee: Sony Corporation
    Inventors: Akiko Tsuji, Toshiki Matsumoto, Hirofumi Fujioka, Mitsuru Asano, Hiroshi Sagawa, Kiwamu Miura
  • Publication number: 20120154258
    Abstract: A display device having at least a plurality of pixel circuits, connected to signal lines to which data signals in accordance with luminance information are supplied, arranged in a matrix, wherein pixel circuits of odd number columns and even number columns adjacent sandwiching an axis in a column direction parallel to an arrangement direction of the signal lines have a mirror type circuit arrangement symmetric about the axis of the column direction, and there are lines different from the signal lines between signal lines of adjacent pixel circuits.
    Type: Application
    Filed: February 29, 2012
    Publication date: June 21, 2012
    Applicant: Sony Corporation
    Inventor: Mitsuru Asano
  • Patent number: 8184075
    Abstract: An active matrix display device includes a driving section provided on a substrate, an insulating film stacked on the substrate, and light-emitting elements arranged in a matrix on the insulating film, and each of the light-emitting elements includes an light-emitting layer between its upper and lower electrodes, the active matrix display device being driven by the driving section provided for each of the light-emitting elements, the active matrix display device also including a first wiring required to cause the light-emitting element to emit light, and a second wiring disposed in the underlying layer of the first wiring via the insulating film, the second wiring also required to cause the light-emitting element to emit light, wherein the first or second wiring is branched into a plurality of wirings at the intersection between the two wirings.
    Type: Grant
    Filed: October 30, 2008
    Date of Patent: May 22, 2012
    Assignee: Sony Corporation
    Inventors: Hiroshi Sagawa, Takayuki Taneda, Tetsuro Yamamoto, Junichi Yamashita, Katsuhide Uchino, Yukihito Iida, Mitsuru Asano
  • Patent number: 8184224
    Abstract: Herein disclosed a display apparatus including: a pixel array having a matrix of pixel circuits each including respective electrooptical elements for determining a display brightness level and respective drive circuits for driving the electrooptical elements; wherein adjacent two of the pixel circuits are paired with each other, and each of the drive circuits of the adjacent two pixel circuits includes at least one transistor having a low-concentration source/drain region or an offset region of an offset gate structure, the electrooptical elements and the drive circuits of the adjacent two pixel circuits being laid out such that a line interconnecting a drain region and a source region of the at least one transistor extends parallel to a direction of pixel columns of the pixel circuits of the pixel array.
    Type: Grant
    Filed: July 25, 2007
    Date of Patent: May 22, 2012
    Assignee: Sony Corporation
    Inventors: Mitsuru Asano, Seiichiro Jinta, Masatsugu Tomida, Hiroshi Fujimura
  • Publication number: 20120092391
    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: Application
    Filed: November 2, 2011
    Publication date: April 19, 2012
    Applicant: Sony Corporation
    Inventors: Yukihito Iida, Yutaka Mitomi, Mitsuru Asano, Tetsuo Minami, Takao Tanikame, Katsuhide Uchino
  • Publication number: 20120086327
    Abstract: A display device in which pixels each including an emission area are arranged in a form of a matrix, the display device including: a first electrode formed from the emission area of the pixels to a non-emission area on a periphery of the emission area; a second electrode formed so as to be common to the pixels; and a light emitting material layer formed between the first electrode and the second electrode; wherein film thickness in the non-emission area of at least one of the first electrode and the second electrode is larger than film thickness in the emission area.
    Type: Application
    Filed: November 14, 2011
    Publication date: April 12, 2012
    Applicant: Sony Corporation
    Inventor: Mitsuru Asano
  • Publication number: 20120062107
    Abstract: In a display device including, a display area having a plurality of organic EL devices on a substrate; a peripheral area having a driving circuit for the organic EL devices and surrounding the display area on the substrate; and an organic insulating film covering at least the driving circuit, the organic insulating film has a separating groove which divides itself into the inner part and outer part at the periphery of the display area.
    Type: Application
    Filed: November 17, 2011
    Publication date: March 15, 2012
    Applicant: Sony Corporation
    Inventors: Hiroshi Fujimura, Masumitsu Ino, Mitsuru Asano, Akira Yumoto, Yuichi Iwase
  • Publication number: 20120044239
    Abstract: An image display device includes a display portion formed by disposing pixel circuits in a matrix, and a signal line driving circuit and a scanning line driving circuit for driving the pixel circuits through signal lines and scanning lines of the display portion. The pixel circuit includes at least: a light emitting element; a drive transistor for current-driving the light emitting element by a drive current corresponding to a gate-to-source voltage thereof; a hold capacitor composed of either one capacitor or a plurality of coupling capacitors for holding therein the gate-to-source voltage; and a write transistor adapted to be turned ON/OFF in accordance with a write signal outputted from the scanning line driving circuit, thereby setting a voltage developed across terminals of the hold capacitor at a voltage of corresponding one of the signal line.
    Type: Application
    Filed: October 31, 2011
    Publication date: February 23, 2012
    Applicant: Sony Corporation
    Inventor: Mitsuru Asano
  • Patent number: 8120246
    Abstract: A display device and a production method for the display device having a pixel region formed by arraying a plurality of pixels each having an organic layer held by a lower electrode and an upper electrode on a substrate are provided. The production method for the display device of the invention includes, in one embodiment, a first step of forming a first insulating film on the substrate, a second step of forming a plurality of such lower electrodes each corresponding to each of the pixels on the first insulating film in the pixel region, forming a conductive film on the first insulating film in a peripheral region outside the pixel region, and forming a hole, in the conductive film, which extends to the first insulating film, and a third step of performing a bake treatment on the substrate on which the lower electrode and the conductive film are provided.
    Type: Grant
    Filed: March 21, 2005
    Date of Patent: February 21, 2012
    Assignee: Sony Corporation
    Inventors: Takanori Shibasaki, Mitsuru Asano
  • Patent number: 8089430
    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: April 4, 2008
    Date of Patent: January 3, 2012
    Assignee: Sony Corporation
    Inventors: Yukihito Ilda, Yutaka Mitomi, Mitsuru Asano, Tetsuo Minami, Takao Tanikame, Katsuhide Uchino
  • Patent number: 8085258
    Abstract: A driving circuit for driving an organic electroluminescence light emitting portion includes: a driving transistor of the n channel type having source/drain regions, a channel formation region and a gate electrode; an image signal writing transistor having source/drain regions, a channel formation region and a gate electrode; and a capacitor element. A first voltage for supplying current toward the organic electroluminescence light emitting portion through the driving transistor and a second voltage for preventing a potential difference between the second node and a cathode electrode provided on the organic electroluminescence light emitting portion from exceeding a threshold voltage of the organic electroluminescence light emitting portion are selectively applied from the power supply section to the first one of the source/drain regions of the driving transistor. An LDD (Lightly Doped Drain) structure is formed adjacent the first one of the source/drain regions of the driving transistor.
    Type: Grant
    Filed: July 31, 2008
    Date of Patent: December 27, 2011
    Assignee: Sony Corporation
    Inventors: Mitsuru Asano, Masatsugu Tomida, Hiroshi Fujimura
  • Patent number: 8080936
    Abstract: In a display device including, a display area having a plurality of organic EL devices on a substrate; a peripheral area having a driving circuit for the organic EL devices and surrounding the display area on the substrate; and an organic insulating film covering at least the driving circuit, the organic insulating film has a separating groove which divides itself into the inner part and outer part at the periphery of the display area.
    Type: Grant
    Filed: July 29, 2005
    Date of Patent: December 20, 2011
    Assignee: Sony Corporation
    Inventors: Hiroshi Fujimura, Masumitsu Ino, Mitsuru Asano, Akira Yumoto, Yuichi Iwase
  • Patent number: 8077124
    Abstract: An image display device includes a display portion formed by disposing pixel circuits in a matrix, and a signal line driving circuit and a scanning line driving circuit for driving the pixel circuits through signal lines and scanning lines of the display portion. The pixel circuit includes at least: a light emitting element; a drive transistor for current-driving the light emitting element by a drive current corresponding to a gate-to-source voltage thereof; a hold capacitor composed of either one capacitor or a plurality of coupling capacitors for holding therein the gate-to-source voltage; and a write transistor adapted to be turned ON/OFF in accordance with a write signal outputted from the scanning line driving circuit, thereby setting a voltage developed across terminals of the hold capacitor at a voltage of corresponding one of the signal line.
    Type: Grant
    Filed: March 11, 2009
    Date of Patent: December 13, 2011
    Assignee: Sony Corporation
    Inventor: Mitsuru Asano
  • Patent number: 8058795
    Abstract: A display device in which pixels, each including an emission area, are arranged in a form of a matrix, the display device including: a first electrode formed from the emission area of the pixels to a non-emission area on a periphery of the emission area; a second electrode formed so as to be common to the pixels; and a light emitting material layer formed between the first electrode and the second electrode; wherein film thickness in the non-emission area of at least one of the first electrode and the second electrode is larger than film thickness in the emission area.
    Type: Grant
    Filed: December 18, 2007
    Date of Patent: November 15, 2011
    Assignee: Sony Corporation
    Inventor: Mitsuru Asano
  • Patent number: 8054298
    Abstract: An image displaying apparatus is configured to display a desired image on an image displaying section employed in the image displaying apparatus by making use of a signal-line driving circuit and a scan-line driving circuit to drive pixel circuits. Each of the pixel circuits employs at least a light emitting device, a signal-level holding capacitor, a driving transistor for driving the light emitting device and a signal writing transistor. The signal-line driving circuit and the scan-line driving circuit drive each of the pixel circuits so as to put the light emitting device employed in the pixel circuit in a no-light emission state of emitting no light in a no-light emission period and a light emission state of emitting light in a light emission period repeatedly.
    Type: Grant
    Filed: March 9, 2009
    Date of Patent: November 8, 2011
    Assignee: Sony Corporation
    Inventors: Mitsuru Asano, Tetsuro Yamamoto, Katsuhide Uchino