Patents by Inventor Koji Nagata

Koji Nagata 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: 9069424
    Abstract: Provided is a touch panel with improved anti-noise performance. A continuous drive pulse train is input to a plurality of scanning electrodes for each one scanning period in turns, and a detection pulse train generated at detection electrodes which intersects the scanning electrodes is detected. The detection pulse train is sampled at different intervals to generate a plurality of data sequences. The plurality of data sequences may be generated from the detection pulse train over a plurality of frame periods. A signal strength of each frequency component is compared between the frequency spectra of the plurality of data sequences, and a frequency spectrum in which frequency components having different strengths have been corrected is generated. A detection signal is generated from the corrected frequency spectrum.
    Type: Grant
    Filed: July 26, 2012
    Date of Patent: June 30, 2015
    Assignee: JAPAN DISPLAY INC.
    Inventor: Koji Nagata
  • Patent number: 9024886
    Abstract: Provided is a touch-panel device capable of detecting a touched position with high accuracy even when a touched area extends off an electrode area. In one embodiment, the touched area is assumed to be, for example, circular in shape. A width in an X direction (overlap width) and a width in a Y direction (overlap width) of an overlap area where the touched area in a circular shape and an electrode area overlap each other is determined based on sensor measured values. When the overlap width and the overlap width are different from each other, it is judged that the touched area extends off the electrode area, and a position of a center of the touched area in the circular shape is calculated as the touched position.
    Type: Grant
    Filed: April 13, 2010
    Date of Patent: May 5, 2015
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Koji Doi, Norio Mamba, Koji Nagata, Toshiyuki Kumagai, Koji Hayakawa
  • Publication number: 20150116246
    Abstract: A display device includes a display panel, a touch panel control unit, a plurality of scanning electrodes formed on the display panel, a plurality of detection electrodes formed on the display panel so as to intersect with the plurality of scanning electrodes, a drive signal supply unit for inputting a drive signal to each of the scanning electrodes, and a detection unit for detecting a detection signal from each of the detection electrodes. The touch panel control unit supplies the driving signal to each of the scanning electrodes from the drive signal supply unit to enable detection of a touch position of a detection object based on the detection signal detected, and supplies the driving signal to all of the scanning electrodes collectively from the drive signal supply unit to enable detection of approach of the detection object to the touch panel based on the detection signal detected.
    Type: Application
    Filed: October 29, 2014
    Publication date: April 30, 2015
    Inventors: Koji Nagata, Koji Doi
  • Publication number: 20150116243
    Abstract: A technique capable of reducing the number of leading lines and making the area of a frame region smaller is provided. A display device includes an in-cell touch panel in which a pair of transparent substrates is arranged so as to oppose each other, a plurality of scanning electrodes are disposed on an opposing surface of one of the transparent substrates, and detection electrodes that intersect with the scanning electrodes are arranged on an opposing surface of the other transparent substrate. The display device further includes at least one first leading lines electrically connected the scanning electrodes and configured to supply a scanning signal to the scanning electrodes, and at least one second leading lines electrically connected to the detection electrodes and configured to output a signal detected by the detection electrodes. In the display device, each of the first leading lines is connected to at least two of the scanning electrodes having different widths.
    Type: Application
    Filed: October 23, 2014
    Publication date: April 30, 2015
    Inventors: Masanari SAITOU, Takahiro MIYAZAKI, Koji NAGATA, Shinji SEKIGUCHI, Tomohiko OOTANI
  • Patent number: 8922522
    Abstract: Provided is a display device equipped with a touch panel, including a front panel arranged above a capacitive touch panel at a predetermined distance away therefrom, in which the touch panel includes a plurality of X electrodes and a plurality of Y electrodes, and the X electrodes are sequentially applied with pulse signals and the Y electrodes receive the pulse signals. When an arbitrary point on the front panel is touched, the touch panel computes a touched point on the touch panel by using both the received pulse signals obtained from the Y electrodes in a case where the front panel is not deformed and the received pulse signals obtained from the Y electrodes in a case where the front panel is deformed. With this, an erroneous operation in which a measurement value is lowered to finally disappear is prevented.
    Type: Grant
    Filed: September 22, 2011
    Date of Patent: December 30, 2014
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Toshiaki Atsuta, Koji Nagata, Koji Doi
  • Patent number: 8907912
    Abstract: Provided is a touch panel including: a plurality of scanning electrodes formed on a display panel; a plurality of detecting electrodes intersecting with the plurality of scanning electrodes, the plurality of detecting electrodes being formed on the display panel; a first unit for sequentially connecting a constant current source to each of the plurality of scanning electrodes for each one scanning period; and a second unit for detecting a touch position on the display panel based on a variation of a current detected at each of the plurality of detecting electrodes. One of the each of the plurality of scanning electrodes and the each of the plurality of detecting electrodes is formed on the display panel surface on a viewer side, and another of the each of the plurality of scanning electrodes and the each of the plurality of detecting electrodes is formed inside the display panel.
    Type: Grant
    Filed: July 24, 2012
    Date of Patent: December 9, 2014
    Assignee: Japan Display Inc.
    Inventor: Koji Nagata
  • Patent number: 8890835
    Abstract: An input apparatus includes: a transparent substrate with which an object is brought into contact; a rectangular single sheet electrode formed on the transparent substrate; first detection means which inputs a measurement signal to the rectangular single sheet electrode from one of two opposing perimeter portions along a first direction, and takes out the measurement signal from another one of the two opposing perimeter portions, to detect a contact point of the contacting object along the first direction; and second detection means which, after the contact point in the first direction is detected, inputs a measurement signal to the rectangular single sheet electrode from one of two opposing perimeter portions along a second direction, and takes out the measurement signal from another one of the two opposing perimeter portions, to detect the contact point along the second direction.
    Type: Grant
    Filed: February 8, 2011
    Date of Patent: November 18, 2014
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Koji Nagata, Norio Mamba, Tsutomu Furuhashi
  • Patent number: 8878768
    Abstract: Provided is a display device that includes a display panel; and a touch panel integrated in the display panel, wherein the touch panel has a plurality of scanning electrodes, a plurality of detection electrodes that intersects with the plurality of scanning electrodes, drive signal supply unit for inputting a drive signal to each of the scanning electrodes, detection unit for acquiring a detection signal from each of the detection electrodes, touch position detection unit for detecting a touch position of an detection object based on the detection signal when the drive signal is sequentially input to each of the scanning electrodes from the drive signal supply unit, and approach detection unit for detecting that the detection object approaches the touch panel based on the detection signal when a scanning voltage is collectively input to all of the scanning electrodes from the drive signal supply unit.
    Type: Grant
    Filed: March 27, 2013
    Date of Patent: November 4, 2014
    Assignee: Japan Display Inc.
    Inventors: Koji Nagata, Koji Doi
  • Patent number: 8866779
    Abstract: A display device includes a display panel and a touch panel built in the display panel. The touch panel includes a sensitivity correcting unit configured to correct the sensitivity of the touch panel. The sensitivity correcting unit includes a difference acquiring unit configured to acquire a signal difference (S1?S2) between a detection signal S1 acquired by detection electrodes when a driving signal V1 is input to scanning electrodes from a driving-signal supplying unit and a detection signal S2 (S1>S2) acquired by the detection electrodes when a driving signal V2 (V1>V2) different from the driving signal V1 is input to the scanning electrodes from the driving-signal supplying unit and a parameter changing unit configured to change parameters of at least one of the driving-signal supplying unit and a detecting unit when the signal difference (S1?S2) is equal to or smaller than a predetermined threshold.
    Type: Grant
    Filed: March 27, 2013
    Date of Patent: October 21, 2014
    Assignee: Japan Display Inc.
    Inventors: Koji Nagata, Tsutomu Furuhashi, Koji Doi, Shinji Sekiguchi
  • Patent number: 8847914
    Abstract: A static capacitance type touch panel, a control unit electrically connected with X and Y electrodes for detecting a touch position based on a measured value of a static capacitance between the X and Y electrodes. The control unit includes a predetermined touch threshold for detecting a peak, a near-peak range and a non-near-peak range, a first parameter for determining a value of the near peak range, and a second parameter for determining a value of the non-near-peak range. The first and second parameters are respectively predetermined for reduction of a noise influence from the measured value of the static capacitance between the X electrode and the Y electrode.
    Type: Grant
    Filed: September 13, 2013
    Date of Patent: September 30, 2014
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co. Ltd.
    Inventors: Koji Doi, Norio Mamba, Koji Nagata, Toshiyuki Kumagai, Koji Hayakawa, Toshiaki Atsuta
  • Publication number: 20140285470
    Abstract: A touch sensing method, for sensing a touch point on a touch panel, includes the steps of measuring capacitances of the touch panel, detecting touch points on the touch panel based on the capacitance, determining tentative coordinates of the respective detected touch points, assigning priorities for a given high coordinate precision to the respective touch points based on a state of the touch points, selecting coordinate calculation algorithms corresponding to the assigned priorities by the respective touch points, estimating a calculation time necessary for calculating the coordinates of the touch points detected, determining whether the calculation time estimated is within a specified time or not, and calculating the coordinates of the respective touch points using the selected coordinate calculation algorithms corresponding to the assigned priorities when the calculation time estimated calculation time is within the specified time.
    Type: Application
    Filed: June 9, 2014
    Publication date: September 25, 2014
    Inventors: Koji DOI, Koji NAGATA
  • Publication number: 20140267159
    Abstract: A display device with a built-in touch panel includes a first substrate, a second substrate, plural pixel electrodes provided between the first substrate and the second substrate, plural common electrodes provided between the first substrate and the second substrate, and plural detection electrodes provided on the first substrate. An image is displayed by light control using an electric field generated between the plural pixel electrodes and the plural common electrodes. The presence or absence of touch is detected by a difference in capacitance due to the presence or absence of a material interrupting the electric field generated between one of the detection electrodes and one of the common electrodes. Each of the detection electrodes includes a through hole.
    Type: Application
    Filed: March 13, 2014
    Publication date: September 18, 2014
    Applicant: Japan Display Inc.
    Inventors: Takahiro MIYAZAKI, Masanari SAITOU, Koji NAGATA, Shinji SEKIGUCHI, Tomohiko OOTANI
  • Patent number: 8832396
    Abstract: A controller for the storage apparatus: creates a second logical volume in a storage area provided by one or more storage devices; stores management information of a snapshot of a first logical volume, which is to be provided to a host computer, in the second logical volume; and reads the management information of a necessary snapshot from the second logical volume to a memory when needed, executes processing using the read management information, and returns the management information, which becomes no longer necessary, from the memory to the second logical volume. When reading the management information of the necessary snapshot from the second logical volume to the memory when needed, the controller changes the number of generations and address range of the snapshot of the management information to be read to the memory according to a generation and address of the snapshot whose management information is required.
    Type: Grant
    Filed: November 25, 2011
    Date of Patent: September 9, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Masayoshi Ohara, Koji Nagata, Kosuke Sakai
  • Publication number: 20140232684
    Abstract: A coordinate input device includes: a coordinate input unit having a plurality of first detection electrodes and a plurality of second detection electrodes; an electrode drive circuit that applies a drive signal to one or more of the detection electrodes; a detection circuit that detects a signal of the first and/or second detection electrode; a selection circuit for selecting one or more of the detection electrodes to which the drive signal is not applied from among the detection electrodes which are disposed in parallel to the detection electrodes to which the drive signal is applied, as a reference electrode; a detection circuit for detecting a signal of the selected reference electrode; an input coordinate computing circuit for correcting a detection result of the detection circuit on the basis of the detected capacitance of the reference electrode and for calculating an input coordinate from the corrected detection result.
    Type: Application
    Filed: April 24, 2014
    Publication date: August 21, 2014
    Applicants: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Norio Mamba, Koji Nagata, Koji Hayakawa
  • Patent number: 8799573
    Abstract: The size of management information pages for storing format management information is minimized and a management size of the management information pages is reduced.
    Type: Grant
    Filed: July 22, 2011
    Date of Patent: August 5, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Yutaro Kawaguchi, Koji Nagata
  • Patent number: 8773369
    Abstract: A sensor apparatus for detecting contact or proximity of an object includes a calculation section for separating a plurality of points of the contact or the proximity that are generated simultaneously, and calculating individual sets of positional coordinates, and the calculation section includes an analysis section for determining, based on a spatial distribution of signal intensity obtained through detection, a condition for separating the spatial distribution of the signal intensity into a plurality of regions.
    Type: Grant
    Filed: May 21, 2010
    Date of Patent: July 8, 2014
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Koji Nagata, Toshiyuki Kumagai, Norio Mamba, Koji Hayakawa
  • Patent number: 8769227
    Abstract: This storage controller providing a volume for storing data transmitted from a host system includes a management unit for managing the data written in the volume with a first block area, or a second block area in the first block area which is smaller than the first block area; a snapshot acquisition unit for acquiring a snapshot of the volume at a prescribed timing; and a transfer unit for transferring the data of the volume acquired with the snapshot of the snapshot acquisition unit to an external device with the first block area or the second block area.
    Type: Grant
    Filed: January 30, 2013
    Date of Patent: July 1, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Katsuo Mogi, Koji Nagata, Shoji Kodama, Ikuya Yagisawa
  • Patent number: 8760435
    Abstract: Provided is a touch panel which completes touch detection within a specified time even when the maximum number of touch points is set to be large. A control portion assigns priorities for being given a high coordinate precision to the respective touch points based on the state of the touch points. The control portion selects coordinate calculation algorithms having coordinate precisions corresponding to the priorities of the respective touch points from among a plurality of coordinate calculation algorithms, and calculates required calculation time for calculating coordinates of all the touch points. The control portion determines the priorities so that the calculated required calculation time is equal to or shorter than a specified time. The control portion selects coordinate calculation algorithms corresponding to the priorities and calculates the coordinates of the respective touch points.
    Type: Grant
    Filed: July 26, 2012
    Date of Patent: June 24, 2014
    Assignee: Japan Display Inc.
    Inventors: Koji Doi, Koji Nagata
  • Patent number: 8745344
    Abstract: A storage system comprises a storage device from which a physical storage area is created for storing data processed in an external apparatus, a thin provisioning controller creating a physical storage area pool with a plurality of unit physical storage areas from the physical storage area, and creating a logical volume from the physical storage area pool, and a snapshot controller designating the logical volume as a primary volume, defining a secondary volume which is a partner of the primary volume as a combination of the primary volume and difference data, assigning unused one of the unit physical storage areas to the area into which the difference data is to be stored, and setting a volume pair created with the primary volume and the secondary volume into a synchronizing state and a non-synchronizing state.
    Type: Grant
    Filed: July 1, 2011
    Date of Patent: June 3, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Takahiro Kito, Koji Nagata, Kosuke Sakai
  • Patent number: 8730189
    Abstract: Provided is a coordinate input device including: a coordinate input unit having a plurality of first detection electrodes and a plurality of second detection electrodes; an electrode drive circuit that applies a drive signal to one or more of the detection electrodes; a capacitance detection circuit that detects a capacitance of the first and/or second detection electrode; means for selecting one or more of the detection electrodes to which the drive signal is not applied from among the detection electrodes which are disposed in parallel to the detection electrodes to which the drive signal is applied, as a reference electrode; means for detecting a capacitance of the selected reference electrode; means for correcting a capacitance detection result of the capacitance detection circuit on the basis of the detected capacitance of the reference electrode; and an input coordinate computing circuit that calculates an input coordinate from the corrected capacitance detection result.
    Type: Grant
    Filed: January 13, 2011
    Date of Patent: May 20, 2014
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Norio Mamba, Koji Nagata, Koji Hayakawa