Patents by Inventor Kenichi Tajika

Kenichi Tajika 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: 9293074
    Abstract: An active-matrix substrate includes: a substrate; gate lines disposed on the substrate; source lines disposed on the substrate in a direction that crosses the gate lines; a first terminal provided for each of data line blocks obtained by grouping every m-lines (m being an integer greater than or equal to 2) of the source lines into a block; a first selection circuit provided for each of the data line blocks, for causing conduction between the first terminal and at least one source line selected from among the m source lines; a second terminal provided for every n-blocks (n being an integer greater than or equal to 2) of the data line blocks; and a second selection terminal provided for every n-blocks of the data line blocks, for causing conduction between the second terminal and at least one source line selected from among the m×n source lines.
    Type: Grant
    Filed: September 4, 2012
    Date of Patent: March 22, 2016
    Assignee: JOLED INC.
    Inventors: Kenichi Tajika, Hiroshi Shirouzu
  • Patent number: 8665251
    Abstract: The display device includes stacked layers including a display element layer and a control layer including a capacitor including an upper electrode layer and a lower electrode layer that face each other in a layer-stacking direction, wherein the upper electrode layer includes a first upper capacitor electrode connecting two circuit elements, a disconnectable portion, and a second upper capacitor electrode connected to the first upper electrode layer through the disconnectable portion, and the lower electrode layer includes a first lower capacitor electrode connecting two circuit elements, a disconnectable portion, and a second lower capacitor electrode connected to the first lower electrode layer through the disconnectable portion. The capacitor has a capacitance each between the first upper capacitor electrode and the second lower capacitor electrode, and the first lower capacitor electrode and the second upper capacitor electrode.
    Type: Grant
    Filed: November 14, 2011
    Date of Patent: March 4, 2014
    Assignee: Panasonic Corporation
    Inventors: Hiroshi Shirouzu, Kenichi Tajika
  • Patent number: 8664671
    Abstract: A display device capable of suppressing decrease in capacitance and capable of reducing area even when a capacitor unit is repaired is provided. A capacitor unit in a display device includes: a capacitor element having a first capacitor electrode connected to a power line and provided in an SD electrode layer and a second capacitor electrode provided in a GM electrode layer; a backup capacitor electrode provided in the TM electrode layer; a disconnect-able portion at which a connection between the first capacitor electrode and the power line can be disconnected; and a connectable portion at which the backup capacitor electrode and the power line can be connected, and the disconnect-able portion and the connectable portion overlap in a stacking direction.
    Type: Grant
    Filed: May 16, 2012
    Date of Patent: March 4, 2014
    Assignee: Panasonic Corporation
    Inventors: Hiroshi Shirouzu, Kenichi Tajika
  • Patent number: 8563993
    Abstract: A capacitor unit in a display device includes: a capacitor element having a first capacitor electrode connected to a power line and provided in a GM electrode layer and a second capacitor electrode connected to a line and provided in an SD electrode layer; a backup capacitor element having a first backup capacitor electrode provided in the GM electrode layer and a second backup capacitor electrode connected to the power line and provided in the SD electrode layer; a disconnect-able portion at which a connection between the second capacitor electrode and the line can be disconnected; and a connectable portion at which the first backup capacitor electrode and the line can be connected, and the disconnect-able portion and the connectable portion are arranged at a position in which the disconnect-able portion and the connectable portion overlap in a stacking direction.
    Type: Grant
    Filed: May 16, 2012
    Date of Patent: October 22, 2013
    Assignee: Panasonic Corporation
    Inventors: Hiroshi Shirouzu, Kenichi Tajika
  • Patent number: 8537151
    Abstract: An inspection method for an active-matrix substrate including the scanning lines, the data lines, the pixels disposed in matrix, and the power lines. The pixel includes: an organic EL device; a drive transistor; a capacitor; a selection transistor having a gate connected to the scanning line and connected between the data line and the gate of the drive transistor, and the guard potential transistor having a gate connected to a source of the selection transistor, a source connected to a drain of the selection transistor, and a drain connected to the power line. The inspection method includes: a writing process for writing a charge in the capacitor; a reading process for reading the written charged from the capacitor; and a holding process for holding the charge for a predetermined period from the end of the writing process to the start of the reading process.
    Type: Grant
    Filed: May 2, 2012
    Date of Patent: September 17, 2013
    Assignee: Panasonic Corporation
    Inventors: Kenichi Tajika, Hiroshi Shirouzu
  • Patent number: 8421200
    Abstract: A semiconductor integrated circuit device is made by stacking a plurality of semiconductor chips. The semiconductor integrated circuit device includes: a penetrating electrode formed to penetrate the plurality of semiconductor chips; a plurality of electrodes formed in respective layers constituting each of the plurality of semiconductor chips and having respective openings within which the penetrating electrode penetrates; and a plurality of vias each of which electrically connects electrodes of the plurality of electrodes located in adjacent layers. The vias are each formed so that the side face thereof is in contact with the penetrating electrode.
    Type: Grant
    Filed: April 3, 2007
    Date of Patent: April 16, 2013
    Assignee: Panasonic Corporation
    Inventors: Kenichi Tajika, Takehisa Kishimoto
  • Patent number: 8344975
    Abstract: A display device including: scanning lines; data lines; pixels provided in a matrix; and a power line, each of the pixels includes: an organic EL device; a drive transistor which converts a data voltage applied to a gate into a drive current; a capacitor which holds a voltage according to the data voltage; a selector transistor having a gate connected to one of the scanning lines and a source connected to the gate of the drive transistor; a selector transistor having a gate connected to the scanning line, a source connected to a drain of the selector transistor, and a drain connected to the data line; and a guard potential transistor having a gate connected to the source of the selector transistor, a source connected to the drain of the selector transistor, and a drain connected to the power line.
    Type: Grant
    Filed: April 5, 2012
    Date of Patent: January 1, 2013
    Assignee: Panasonic Corporation
    Inventors: Hiroshi Shirouzu, Kenichi Tajika
  • Publication number: 20120326744
    Abstract: An active-matrix substrate includes: a substrate; gate lines disposed on the substrate; source lines disposed on the substrate in a direction that crosses the gate lines; a first terminal provided for each of data line blocks obtained by grouping every m-lines (m being an integer greater than or equal to 2) of the source lines into a block; a first selection circuit provided for each of the data line blocks, for causing conduction between the first terminal and at least one source line selected from among the m source lines; a second terminal provided for every n-blocks (n being an integer greater than or equal to 2) of the data line blocks; and a second selection terminal provided for every n-blocks of the data line blocks, for causing conduction between the second terminal and at least one source line selected from among the m×n source lines.
    Type: Application
    Filed: September 4, 2012
    Publication date: December 27, 2012
    Applicant: PANASONIC CORPORATION
    Inventors: Kenichi TAJIKA, Hiroshi SHIROUZU
  • Publication number: 20120326176
    Abstract: A capacitor unit in a display device includes: a capacitor element having a first capacitor electrode connected to a power line and provided in a GM electrode layer and a second capacitor electrode connected to a line and provided in an SD electrode layer; a backup capacitor element having a first backup capacitor electrode provided in the GM electrode layer and a second backup capacitor electrode connected to the power line and provided in the SD electrode layer; a disconnect-able portion at which a connection between the second capacitor electrode and the line can be disconnected; and a connectable portion at which the first backup capacitor electrode and the line can be connected, and the disconnect-able portion and the connectable portion are arranged at a position in which the disconnect-able portion and the connectable portion overlap in a stacking direction.
    Type: Application
    Filed: May 16, 2012
    Publication date: December 27, 2012
    Applicant: PANASONIC CORPORATION
    Inventors: Hiroshi SHIROUZU, Kenichi TAJIKA
  • Publication number: 20120326177
    Abstract: A display device capable of suppressing decrease in capacitance and capable of reducing area even when a capacitor unit is repaired is provided. A capacitor unit in a display device includes: a capacitor element having a first capacitor electrode connected to a power line and provided in an SD electrode layer and a second capacitor electrode provided in a GM electrode layer; a backup capacitor electrode provided in the TM electrode layer; a disconnect-able portion at which a connection between the first capacitor electrode and the power line can be disconnected; and a connectable portion at which the backup capacitor electrode and the power line can be connected, and the disconnect-able portion and the connectable portion overlap in a stacking direction.
    Type: Application
    Filed: May 16, 2012
    Publication date: December 27, 2012
    Applicant: PANASONIC CORPORATION
    Inventors: Hiroshi SHIROUZU, Kenichi TAJIKA
  • Publication number: 20120212475
    Abstract: An inspection method for an active-matrix substrate including the scanning lines, the data lines, the pixels disposed in matrix, and the power lines. The pixel includes: an organic EL device; a drive transistor; a capacitor; a selection transistor having a gate connected to the scanning line and connected between the data line and the gate of the drive transistor, and the guard potential transistor having a gate connected to a source of the selection transistor, a source connected to a drain of the selection transistor, and a drain connected to the power line. The inspection method includes: a writing process for writing a charge in the capacitor; a reading process for reading the written charged from the capacitor; and a holding process for holding the charge for a predetermined period from the end of the writing process to the start of the reading process.
    Type: Application
    Filed: May 2, 2012
    Publication date: August 23, 2012
    Applicant: PANASONIC CORPORATION
    Inventors: Kenichi TAJIKA, Hiroshi SHIROUZU
  • Publication number: 20120188150
    Abstract: A display device including: scanning lines; data lines; pixels provided in a matrix; and a power line, each of the pixels includes: an organic EL device; a drive transistor which converts a data voltage applied to a gate into a drive current; a capacitor which holds a voltage according to the data voltage; a selector transistor having a gate connected to one of the scanning lines and a source connected to the gate of the drive transistor; a selector transistor having a gate connected to the scanning line, a source connected to a drain of the selector transistor, and a drain connected to the data line; and a guard potential transistor having a gate connected to the source of the selector transistor, a source connected to the drain of the selector transistor, and a drain connected to the power line.
    Type: Application
    Filed: April 5, 2012
    Publication date: July 26, 2012
    Applicant: PANASONIC CORPORATION
    Inventors: Hiroshi SHIROUZU, Kenichi TAJIKA
  • Publication number: 20120056538
    Abstract: The display device includes stacked layers including a display element layer and a control layer including a capacitor including an upper electrode layer and a lower electrode layer that face each other in a layer-stacking direction, wherein the upper electrode layer includes a first upper capacitor electrode connecting two circuit elements, a disconnectable portion, and a second upper capacitor electrode connected to the first upper electrode layer through the disconnectable portion, and the lower electrode layer includes a first lower capacitor electrode connecting two circuit elements, a disconnectable portion, and a second lower capacitor electrode connected to the first lower electrode layer through the disconnectable portion. The capacitor has a capacitance each between the first upper capacitor electrode and the second lower capacitor electrode, and the first lower capacitor electrode and the second upper capacitor electrode.
    Type: Application
    Filed: November 14, 2011
    Publication date: March 8, 2012
    Applicant: PANASONIC CORPORATION
    Inventors: Hiroshi SHIROUZU, Kenichi TAJIKA
  • Patent number: 7626266
    Abstract: A semiconductor integrated circuit device includes a functional circuit block, a power supply for supplying power to the functional circuit block, a power supply interruption circuit disposed between the functional circuit block and the power supply and including a plurality of switching elements, and a power supply interruption control circuit for individually driving the switching elements. The functional circuit block is formed by integrating functional circuits, such as a logic circuit and a memory circuit. The functional circuits are formed with power supply terminals, respectively, and the power supply terminals are electrically connected through power supply interconnects to the switching elements. The power supply interconnects have the same length.
    Type: Grant
    Filed: June 27, 2006
    Date of Patent: December 1, 2009
    Assignee: Panasonic Corporation
    Inventor: Kenichi Tajika
  • Publication number: 20070246816
    Abstract: A semiconductor integrated circuit device is made by stacking a plurality of semiconductor chips. The semiconductor integrated circuit device includes: a penetrating electrode formed to penetrate the plurality of semiconductor chips; a plurality of electrodes formed in respective layers constituting each of the plurality of semiconductor chips and having respective openings within which the penetrating electrode penetrates; and a plurality of vias each of which electrically connects electrodes of the plurality of electrodes located in adjacent layers. The vias are each formed so that the side face thereof is in contact with the penetrating electrode.
    Type: Application
    Filed: April 3, 2007
    Publication date: October 25, 2007
    Inventors: Kenichi Tajika, Takehisa Kishimoto
  • Patent number: 7181709
    Abstract: In a clock delay adjusting method of a semiconductor integrated circuit device, a plurality of source points for adjusting a clock delay is provided to synchronize a value of the clock delay from each of the source points of each of hierarchical blocks in a semiconductor chip to a clock input circuit operating synchronously with a clock, according to circuit design conditions of the hierarchical blocks. Area terminals are provided in the source points, respectively. A clock input terminal of the semiconductor chip and each area terminal are connected through a clock line so as to be clock distributed over a hierarchical top. A clock delay between the hierarchical blocks is adjusted.
    Type: Grant
    Filed: January 30, 2004
    Date of Patent: February 20, 2007
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kenichi Tajika, Hiroki Tomoshige, Minoru Itoh
  • Publication number: 20070007642
    Abstract: A semiconductor integrated circuit device includes a functional circuit block, a power supply for supplying power to the functional circuit block, a power supply interruption circuit disposed between the functional circuit block and the power supply and including a plurality of switching elements, and a power supply interruption control circuit for individually driving the switching elements. The functional circuit block is formed by integrating functional circuits, such as a logic circuit and a memory circuit. The functional circuits are formed with power supply terminals, respectively, and the power supply terminals are electrically connected through power supply interconnects to the switching elements. The power supply interconnects have the same length.
    Type: Application
    Filed: June 27, 2006
    Publication date: January 11, 2007
    Inventor: Kenichi Tajika
  • Publication number: 20040250152
    Abstract: The invention has been made to provide a method of adjusting the clock delay by carrying out timing control including the synchronization of a clock delay in each hierarchical block and timing control in consideration of the synchronization of a clock delay over a hierarchical top.
    Type: Application
    Filed: January 30, 2004
    Publication date: December 9, 2004
    Inventors: Kenichi Tajika, Hiroki Tomoshige, Minoru Itoh