Patents by Inventor Eiji Kanda

Eiji Kanda 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: 8710442
    Abstract: A sensing device includes a first electrode, a second electrode with a first opening portion, a light blocking layer with a second opening portion, an organic EL layer including a light emitting unit and being formed between the first electrode and the second electrode, and a light receiving unit. The light blocking layer is positioned in the first electrode or between the first electrode and the second electrode, and in plan view from the subject side, the light blocking layer overlaps the first opening portion and the second opening portion is positioned within the first opening portion, and the light receiving unit is positioned further from the subject side than the second electrode, and in plan view from the subject side, the light receiving unit is positioned within the second opening portion.
    Type: Grant
    Filed: August 29, 2013
    Date of Patent: April 29, 2014
    Assignee: Seiko Epson Corporation
    Inventors: Eiji Kanda, Hideto Ishiguro, Tsukasa Eguchi, Tetsuji Fujita, Hidetoshi Yamamoto
  • Patent number: 8704234
    Abstract: A light-emitting device includes a drive transistor for controlling the quantity of current supplied to a light-emitting element, a capacitor element electrically connected to a gate electrode of the drive transistor, and an electrical continuity portion for electrically connecting the drive transistor and the light-emitting element, these elements being disposed on a substrate. The electrical continuity portion is disposed on the side opposite to the capacitor element with the drive transistor disposed therebetween.
    Type: Grant
    Filed: October 25, 2006
    Date of Patent: April 22, 2014
    Assignee: Seiko Epson Corporation
    Inventors: Takehiko Kubota, Eiji Kanda, Ryoichi Nozawa
  • Patent number: 8698714
    Abstract: To reduce the time for writing a voltage onto a gate of a driving transistor. In an initialization period, a node B is fixed to an initial voltage VINI, transistors are turned on, and a current flows into an OLED element, such that a voltage according to the current is held at the node A. Thereafter, the transistors are sequentially turned off, such that a threshold voltage of a driving transistor is held at the node A. In a writing period, a transistor is turned on and a data signal X-j is supplied, such that a voltage of the node B varies by the amount according to the current flowing into the OLED element. The voltage of the node A varies from the threshold voltage by the amount which is obtained by dividing the voltage variation by a capacitance ratio. In a light-emitting period, the transistor is turned on, such that a current according to the voltage of the node A flows into the OLED element.
    Type: Grant
    Filed: December 4, 2009
    Date of Patent: April 15, 2014
    Assignee: Seiko Epson Corporation
    Inventors: Tokuro Ozawa, Toshiyuki Kasai, Eiji Kanda, Ryoichi Nozawa
  • Patent number: 8692259
    Abstract: A light-emitting device includes a power feeding line to which a predetermined voltage is supplied; a light-emitting element formed of a first electrode, a second electrode, and a light-emitting layer interposed between the first electrode and the second electrode; and a driving transistor that controls the amount of current supplied to the light-emitting element from the power feeding line. The power feeding line includes a portion interposed between the first electrode and the driving transistor.
    Type: Grant
    Filed: April 11, 2012
    Date of Patent: April 8, 2014
    Assignee: Seiko Epson Corporation
    Inventors: Takehiko Kubota, Eiji Kanda, Ryoichi Nozawa
  • Publication number: 20140070100
    Abstract: A sensing device includes a first electrode, a second electrode with a first opening portion, a light blocking layer with a second opening portion, an organic EL layer including a light emitting unit and being formed between the first electrode and the second electrode, and a light receiving unit. The light blocking layer is positioned in the first electrode or between the first electrode and the second electrode, and in plan view from the subject side, the light blocking layer overlaps the first opening portion and the second opening portion is positioned within the first opening portion, and the light receiving unit is positioned further from the subject side than the second electrode, and in plan view from the subject side, the light receiving unit is positioned within the second opening portion.
    Type: Application
    Filed: August 29, 2013
    Publication date: March 13, 2014
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Eiji KANDA, Hideto ISHIGURO, Tsukasa EGUCHI, Tetsuji FUJITA, Hidetoshi YAMAMOTO
  • Patent number: 8552378
    Abstract: A light emitting unit is positioned to the subject side than a light receiving unit in a sensing device. The light emitting unit includes a light emitting layer, a first electrode, a second electrode which has an opening, and an insulating layer that is provided at a position that corresponds to the opening portion of the second electrode and that partially insulates the first electrode and the second electrode. The light receiving unit includes a light receiving element that receives reflected light. The light blocking layer is provided at a position that corresponds to the opening portion, and an opening portion is formed thereon. In a case when viewed in a plan view, the light blocking layer overlaps the opening portion, and a light receiving face of the light receiving element is positioned within the opening.
    Type: Grant
    Filed: April 4, 2012
    Date of Patent: October 8, 2013
    Assignee: Seiko Epson Corporation
    Inventors: Eiji Kanda, Hideto Ishiguro, Tsukasa Eguchi, Tetsuji Fujita, Hidetoshi Yamamoto
  • Patent number: 8416212
    Abstract: An electro-optical device, which has a display area and a plurality of sensing areas for detecting capacitance in the display area, includes a black matrix that is provided in the vicinities of display pixels in the display area, pixel electrodes that individually form the display pixels, a common electrode, a liquid crystal layer that is interposed between the pixel electrodes and the common electrode, a plurality of pixel circuits that individually drive the pixel electrodes, a capacitance detection element that is provided in a corresponding one of the sensing areas to convert a change in thickness of the liquid crystal layer caused by external pressure into a change in capacitance, and a sensing circuit that outputs a sensing signal on the basis of the change in capacitance obtained by the capacitance detection element. The capacitance detection element overlaps the black matrix in planar view.
    Type: Grant
    Filed: November 14, 2008
    Date of Patent: April 9, 2013
    Assignee: Sony Corporation
    Inventors: Tsukasa Eguchi, Eiji Kanda
  • Patent number: 8319750
    Abstract: A display device includes: a first substrate and a second substrate that face each other; electro-optical elements that are interposed between the first substrate and the second substrate; light detecting units that are provided between the first substrate and the second substrate and output first detection signals having levels corresponding to the amount of incident light; and capacitance detecting units that include capacitive elements each having a first electrode and a second electrode provided between the first substrate and the second substrate, output second detection signals having levels corresponding to the capacitance values of the capacitive elements, and are provided separately from the light detecting units.
    Type: Grant
    Filed: April 21, 2009
    Date of Patent: November 27, 2012
    Assignee: Sony Corporation
    Inventors: Hitoshi Ota, Eiji Kanda
  • Publication number: 20120286659
    Abstract: A light-emitting device includes a drive transistor that controls a current to be supplied to a light-emitting element from a power supply line, an element continuity portion that electrically connects the drive transistor with the light-emitting element, an initializing transistor that is turned ON to diode-connect the drive transistor, and a connecting portion that electrically connects the drive transistor with the initializing transistor. The power supply line includes a first portion extending in a predetermined direction. The element continuity portion and the connecting portion are formed from the same layer as that of the power supply line and are located on one side along the width of the first portion across the drive transistor.
    Type: Application
    Filed: July 24, 2012
    Publication date: November 15, 2012
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Takehiko Kubota, Eiji Kanda, Ryoichi Nozawa
  • Publication number: 20120256089
    Abstract: A light emitting unit is positioned to the subject side than a light receiving unit in a sensing device. The light emitting unit includes a light emitting layer, a first electrode, a second electrode which has an opening, and an insulating layer that is provided at a position that corresponds to the opening portion of the second electrode and that partially insulates the first electrode and the second electrode. The light receiving unit includes a light receiving element that receives reflected light. The light blocking layer is provided at a position that corresponds to the opening portion, and an opening portion is formed thereon. In a case when viewed in a plan view, the light blocking layer overlaps the opening portion, and a light receiving face of the light receiving element is positioned within the opening.
    Type: Application
    Filed: April 4, 2012
    Publication date: October 11, 2012
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Eiji KANDA, Hideto ISHIGURO, Tsukasa EGUCHI, Tetsuji FUJITA, Hidetoshi YAMAMOTO
  • Publication number: 20120199871
    Abstract: A light-emitting device includes a power feeding line to which a predetermined voltage is supplied; a light-emitting element formed of a first electrode, a second electrode, and a light-emitting layer interposed between the first electrode and the second electrode; and a driving transistor that controls the amount of current supplied to the light-emitting element from the power feeding line. The power feeding line includes a portion interposed between the first electrode and the driving transistor.
    Type: Application
    Filed: April 11, 2012
    Publication date: August 9, 2012
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Takehiko KUBOTA, Eiji KANDA, Ryoichi NOZAWA
  • Patent number: 8198636
    Abstract: A light-emitting device includes a power feeding line to which a predetermined voltage is supplied; a light-emitting element formed of a first electrode, a second electrode, and a light-emitting layer interposed between the first electrode and the second electrode; and a driving transistor that controls the amount of current supplied to the light-emitting element from the power feeding line. The power feeding line includes a portion interposed between the first electrode and the driving transistor.
    Type: Grant
    Filed: December 3, 2010
    Date of Patent: June 12, 2012
    Assignee: Seiko Epson Corporation
    Inventors: Takehiko Kubota, Eiji Kanda, Ryoichi Nozawa
  • Publication number: 20120104401
    Abstract: A light-emitting device includes a drive transistor for controlling the quantity of current supplied to a light-emitting element, a capacitor element electrically connected to a gate electrode of the drive transistor, and an electrical continuity portion for electrically connecting the drive transistor and the light-emitting element, these elements being disposed on a substrate. The electrical continuity portion is disposed on the side opposite to the capacitor element with the drive transistor disposed therebetween.
    Type: Application
    Filed: January 10, 2012
    Publication date: May 3, 2012
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Takehiko KUBOTA, Eiji KANDA, Ryoichi NOZAWA
  • Patent number: 8144083
    Abstract: A method for driving a light-emitting device in which a plurality of pixel circuits are arranged in correspondence with the intersection of a plurality of scanning lines and a plurality data lines, the pixel circuit having a light-emitting element and a driving transistor that controls the current amount of a driving current flowing the light-emitting device, comprises repeating the process within unit period including a first period and a second period following the first period, wherein the second period process includes selecting one scanning line of the plurality of scanning lines, and supplying and holding a data voltage corresponding to the luminance of the light-emitting element to a gate of the driving transistor via the data lines with respect to the plurality pixel circuits connected the selected scanning lines, and wherein the first period process includes selecting two or more scanning lines of the plurality of scanning lines, and correcting the unbalance of the driving current output from the dri
    Type: Grant
    Filed: May 24, 2006
    Date of Patent: March 27, 2012
    Assignee: Seiko Epson Corporation
    Inventors: Kasori Takahashi, Eiji Kanda, Tokuro Ozawa
  • Patent number: 8089476
    Abstract: A liquid crystal device includes a plurality of selection lines, a plurality of signal lines, a plurality of pixel portions, a plurality of photosensor portions, a plurality of first power lines, and a plurality of sense lines. The plurality of selection lines are provided in a line direction. The plurality of signal lines are provided in a column direction. The plurality of pixel portions are provided at positions corresponding to intersections of the selection lines and the signal lines. The plurality of photosensor portions are provided in correspondence with a portion of the plurality of pixel portions. The plurality of first power lines are provided in the line direction. The plurality of sense lines are provided in the column direction. Each of the plurality of pixel portions includes a first switching element and a liquid crystal.
    Type: Grant
    Filed: July 25, 2008
    Date of Patent: January 3, 2012
    Assignee: Sony Corporation
    Inventors: Hideto Ishiguro, Eiji Kanda, Hitoshi Ota
  • Patent number: 8072396
    Abstract: A unit circuit includes an electro-optical element, a first capacitive element, a second capacitive element, a third capacitive element, a drive transistor, a first switching element, an initialization unit, and a compensation unit. The electro-optical element emits an amount of light in accordance with a magnitude of a drive current. The first capacitive element includes a first electrode and a second electrode, the first electrode is electrically connected to a first node, and the second electrode is capable of receiving a fixed potential. The second capacitive element includes a third electrode and a fourth electrode, the third electrode is electrically connected to a second node, and the fourth electrode is capable of receiving a fixed potential. The third capacitive element includes a fifth electrode and a sixth electrode, the fifth electrode is electrically connected to the first node, and the sixth electrode is electrically connected to the second node.
    Type: Grant
    Filed: May 17, 2007
    Date of Patent: December 6, 2011
    Assignee: Seiko Epson Corporation
    Inventors: Takayuki Kitazawa, Eiji Kanda
  • Patent number: 7928935
    Abstract: An electro-optical device includes a plurality of data lines, scan lines, and unit circuits. Each data line is supplied with a data potential corresponding to a gray scale, and each scan line is supplied with a scan signal defining a writing period. Each unit circuit includes a drive transistor generating a driving current, an electro-optical element displaying a gray scale, a capacitive element having first and second electrodes, an electric supply line, which extends in a direction so as not to intersect the scan line, connected to the second electrode in an initialization period other than the writing period, a first switching element connecting the gate and drain of the drive transistor during at least the initialization period, and a second switching element controlling an electrical connection between the data line and the first electrode based on the scan signal.
    Type: Grant
    Filed: August 17, 2007
    Date of Patent: April 19, 2011
    Assignee: Seiko Epson Corporation
    Inventor: Eiji Kanda
  • Publication number: 20110068707
    Abstract: A light-emitting device includes a power feeding line to which a predetermined voltage is supplied; a light-emitting element formed of a first electrode, a second electrode, and a light-emitting layer interposed between the first electrode and the second electrode; and a driving transistor that controls the amount of current supplied to the light-emitting element from the power feeding line. The power feeding line includes a portion interposed between the first electrode and the driving transistor.
    Type: Application
    Filed: December 3, 2010
    Publication date: March 24, 2011
    Applicant: Seiko Epson Corporation
    Inventors: Takehiko Kubota, Eiji Kanda, Ryoichi Nozawa
  • Patent number: 7902559
    Abstract: A light emitting device includes a substrate having transparency, a light emitting element that emits light at least to the substrate side, and a light detecting element that is formed between the light emitting element and the substrate. The light detecting element is formed along an outer frame of the light emitting element in a plan view.
    Type: Grant
    Filed: November 12, 2008
    Date of Patent: March 8, 2011
    Assignee: Seiko Epson Corporation
    Inventors: Tsukasa Eguchi, Hiroaki Jo, Eiji Kanda, Toshiyuki Kasai, Atsushi Ito
  • Publication number: 20110031882
    Abstract: A light-emitting device includes a drive transistor that controls a current to be supplied to a light-emitting element from a power supply line, an electrical continuity portion that electrically connects the drive transistor with the light-emitting element, an initializing transistor that is turned ON to diode-connect the drive transistor, and a connecting portion that electrically connects the drive transistor with the initializing transistor. The power supply line including a first portion extending in a first direction and a second portion extending in a second direction that crosses the first direction. The connecting portion being positioned in an area between the first and second power supply lines in plan view.
    Type: Application
    Filed: October 25, 2010
    Publication date: February 10, 2011
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Takehiko KUBOTA, Eiji Kanda, Ryoichi Nozawa