Patents by Inventor Takanori Tsunashima

Takanori Tsunashima 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: 9858871
    Abstract: According to one embodiment, a display device includes a unit pixel including a first pixel, a second pixel neighboring to the first pixel in a column direction, a third pixel neighboring to the first pixel in a row direction, and a fourth pixel neighboring to the second pixel in the row direction, a scanning line extending in the row direction and electrically connected to the first to fourth pixels, and first to fourth signal lines extending in the column direction and provided at intervals therebetween in the row direction, and the first to fourth signal lines are electrically connected to the first to fourth pixels, and video signal potentials for inverted drive applied to the first and second signal lines are inverted in polarity with respect to each other, and those to the third and fourth signal lines are inverted in polarity with respect to each other.
    Type: Grant
    Filed: March 2, 2015
    Date of Patent: January 2, 2018
    Assignee: Japan Display Inc.
    Inventors: Takanori Tsunashima, Hirotaka Hayashi
  • Publication number: 20170373096
    Abstract: According to one embodiment, a display device includes a pixel, a scanning line, a signal line, a pixel electrode, a first switching element, and a capacitance line producing capacitance together with the pixel electrode. The first switching element includes a first semiconductor layer connected to the signal line and the pixel electrode, and a first gate electrode opposed to the first semiconductor layer and connected to the scanning line. The capacitance line includes a first portion opposed to the scanning line and extending in an extension direction of the scanning line, a second portion connected to the first portion and opposed to the pixel electrode.
    Type: Application
    Filed: June 23, 2017
    Publication date: December 28, 2017
    Applicant: Japan Display Inc.
    Inventors: Makoto UCHIDA, Takanori TSUNASHIMA
  • Publication number: 20170235399
    Abstract: According to one embodiment, a liquid crystal display device includes touch-sensor electrodes, an array substrate including pixel electrodes, gate lines, source lines, switching elements, a light-shielding layer, and a plurality of stripe-like common electrodes, a counter-substrate, and a liquid crystal layer, wherein the common electrodes included in the array substrate are used not only as electrodes for display, but also as touch-sensor electrodes and, in a touch operation, a touch drive signal is input to each drive unit electrode including a plurality of common electrodes, and the light-shielding layer is divided into parts each of which corresponds to the drive unit electrode, and is provided to extend across a region opposed to a region of the drive unit electrode.
    Type: Application
    Filed: February 16, 2017
    Publication date: August 17, 2017
    Applicant: Japan Display Inc.
    Inventors: Takanori TSUNASHIMA, Takashi Nakamura, Masahiro Tada, Kazuhide Mochizuki
  • Publication number: 20170004786
    Abstract: According to one embodiment, a first Pixel is connected to a first source line via a first switch included in a first Pixel and the second Pixel is connected to a second source line via a second switch included in the second Pixel. The first Pixel has a first memory, and the second Pixel has a second memory. A first potential line supplies data 1 and a second potential line supplies data 0. The first and second Pixels can store data 1 or 0, when a gate signal is applied to a gate line and the first and second switches are turned on. In this case, in order to store the same data (1 or 0) in the first and second memories, the first and second source lines should be applied different revel signals each other.
    Type: Application
    Filed: May 16, 2016
    Publication date: January 5, 2017
    Applicant: Japan Display Inc.
    Inventor: Takanori TSUNASHIMA
  • Publication number: 20160259475
    Abstract: According to one embodiment, a display device includes plural display pixels arranged in a matrix, plural gate lines, plural source lies and a control circuit which controls by applying intermittent driving and a column-inversion drive scheme, an operation in which drive signals are supplied to the gate lines and the source lines, and an image signal is supplied to the display pixels and held thereby, wherein the display pixels each include a liquid crystal in which alignment of liquid crystal molecules is changed by a voltage between pixel electrodes and a common electrode, and the control circuit applies in a signal stop period in the intermittent driving, a voltage corresponding to a gradation higher than or equal to white gradation to the source lines in a case where a display mode of the liquid crystal is a normally-black mode.
    Type: Application
    Filed: March 3, 2016
    Publication date: September 8, 2016
    Applicant: Japan Display Inc.
    Inventors: Takashi NAKAMURA, Masahiro TADA, Takanori TSUNASHIMA, Hirotaka HAYASHI, Kazuhide MOCHIZUKI
  • Patent number: 9411478
    Abstract: According to one embodiment, a display device includes a display panel having a counter substrate, an array substrate and a liquid crystal layer held therebetween, a counter electrode provided on the counter substrate, a pixel electrode arranged on the array substrate in a matrix, a sensor circuit arranged between rows of the plurality of pixel electrodes and configured to read out intensity of capacitive coupling between the sensor circuit and a dielectric, and a counter electrode drive circuit configured to pulsatively drive a common voltage added to the counter electrode during a period of driving the sensor circuit, wherein the sensor circuit comprises a detection electrode configured to form capacitance between the sensor circuit and the dielectric and to form capacitance between the sensor circuit and the counter electrode, and wherein the counter electrode comprises an aperture including at least a portion opposed to the detection electrode.
    Type: Grant
    Filed: April 21, 2014
    Date of Patent: August 9, 2016
    Assignee: Japan Display Inc.
    Inventors: Miyuki Ishikawa, Masahiro Tada, Takashi Nakamura, Yutaka Umeda, Hirotaka Hayashi, Yoshiro Aoki, Takanori Tsunashima
  • Patent number: 9335856
    Abstract: According to one embodiment, a display device includes a display pixel allocated at a matrix state in a display area, an image-reading device which detects strength of capacitive coupling by a dielectric material coming close to or making contact with the display area, and a control portion which controls each transistor of the image-reading device. The image-reading device includes a detection electrode which forms capacitance between the detection electrode and the dielectric material, a pre-charge gate line, a coupling pulse line, a readout gate line, a pre-charge line and a readout line. These lines supply a signal which drives the image-reading device. The image-reading device further includes a pre-charge transistor, an amplification transistor, a readout transistor, a compensation transistor, and a power-source switching transistor.
    Type: Grant
    Filed: January 10, 2014
    Date of Patent: May 10, 2016
    Assignee: Japan Display Inc.
    Inventors: Keiichi Saito, Hideyuki Takahashi, Takashi Nakamura, Satoru Tomita, Masahiro Tada, Hirotaka Hayashi, Takashi Okada, Yoshiro Aoki, Takanori Tsunashima
  • Patent number: 9331078
    Abstract: According to one embodiment, provided is a thin film transistor device with further improved area efficiency. First contact regions of a first semiconductor layer portion are formed with the first channel region therebetween in a predetermined direction and doped with an N-type impurity, one of the first contact regions electrically connected with a shared electrode, while the other electrically connected with a first electrode. Second contact regions of a second semiconductor layer portion are formed with the second channel region therebetween in the predetermined direction and doped with a P-type impurity, one of the second contact regions electrically connected with the shared electrode, while the other electrically connected with a second electrode. The first and second contact regions are partially disposed alternately and adjacently in a direction intersecting with the predetermined direction.
    Type: Grant
    Filed: June 12, 2015
    Date of Patent: May 3, 2016
    Assignee: Japan Display Inc.
    Inventor: Takanori Tsunashima
  • Patent number: 9285911
    Abstract: According to one embodiment, a display device includes a display pixel allocated at a matrix state in a display area, an image-reading device which detects strength of capacitive coupling by a dielectric material coming close to or making contact with the display area, and a control portion which controls each transistor of the image-reading device. The image-reading device includes a detection electrode which forms capacitance between the detection electrode and the dielectric material, a pre-charge gate line, a coupling pulse line, a readout gate line, a pre-charge line and a readout line. These lines supply a signal which drives the image-reading device. The image-reading device further includes a pre-charge transistor, an amplification transistor, a readout transistor, a compensation transistor, and a power-source switching transistor.
    Type: Grant
    Filed: January 10, 2014
    Date of Patent: March 15, 2016
    Assignee: Japan Display Inc.
    Inventors: Keiichi Saito, Hideyuki Takahashi, Takashi Nakamura, Satoru Tomita, Masahiro Tada, Hirotaka Hayashi, Takashi Okada, Yoshiro Aoki, Takanori Tsunashima
  • Publication number: 20150364469
    Abstract: According to one embodiment, provided is a thin film transistor device with further improved area efficiency. First contact regions of a first semiconductor layer portion are formed with the first channel region therebetween in a predetermined direction and doped with an N-type impurity, one of the first contact regions electrically connected with a shared electrode, while the other electrically connected with a first electrode. Second contact regions of a second semiconductor layer portion are formed with the second channel region therebetween in the predetermined direction and doped with a P-type impurity, one of the second contact regions electrically connected with the shared electrode, while the other electrically connected with a second electrode. The first and second contact regions are partially disposed alternately and adjacently in a direction intersecting with the predetermined direction.
    Type: Application
    Filed: June 12, 2015
    Publication date: December 17, 2015
    Applicant: Japan Display Inc.
    Inventor: Takanori TSUNASHIMA
  • Publication number: 20150248866
    Abstract: According to one embodiment, a display device includes a unit pixel including a first pixel, a second pixel neighboring to the first pixel in a column direction, a third pixel neighboring to the first pixel in a row direction, and a fourth pixel neighboring to the second pixel in the row direction, a scanning line extending in the row direction and electrically connected to the first to fourth pixels, and first to fourth signal lines extending in the column direction and provided at intervals therebetween in the row direction, and the first to fourth signal lines are electrically connected to the first to fourth pixels, and video signal potentials for inverted drive applied to the first and second signal lines are inverted in polarity with respect to each other, and those to the third and fourth signal lines are inverted in polarity with respect to each other.
    Type: Application
    Filed: March 2, 2015
    Publication date: September 3, 2015
    Applicant: Japan Display Inc.
    Inventors: Takanori TSUNASHIMA, Hirotaka HAYASHI
  • Patent number: 9104257
    Abstract: According to one embodiment, a display apparatus includes signal lines, and pixels. Each of the pixels includes a pixel electrode and a pixel control switch, and being classified into any of pixel groups. Each of the pixel groups includes a memory, and a sensor circuit which is configured to provide data for a detection signal to the memory when detecting the input information. The pixel control switch is configured to switch the voltage level of the pixel electrode in accordance with data for the display signal input via the signal line and the data for the detection signal input from the memory.
    Type: Grant
    Filed: March 21, 2012
    Date of Patent: August 11, 2015
    Assignee: JAPAN DISPLAY INC.
    Inventors: Satoshi Maruyama, Takanori Tsunashima, Hiroyuki Kimura, Kenji Harada, Hirotaka Hayashi
  • Publication number: 20150109267
    Abstract: According to one embodiment, a display device includes a unit pixel, a scanning line, and first to fourth signal lines. The first to fourth signal lines are extended in a columnar direction and are spaced apart from each other. The first and second signal lines are positioned in a region opposed to first and second pixel electrodes in a row direction. The third and fourth signal lines are positioned in a region opposed to third and fourth pixel electrodes in the row direction.
    Type: Application
    Filed: October 14, 2014
    Publication date: April 23, 2015
    Applicant: Japan Display Inc.
    Inventors: Yoshiro AOKI, Tsutomu HARADA, Takanori TSUNASHIMA, Hirotaka HAYASHI
  • Publication number: 20140333852
    Abstract: According to one embodiment, a display device includes a display panel having a counter substrate, an array substrate and a liquid crystal layer held therebetween, a counter electrode provided on the counter substrate, a pixel electrode arranged on the array substrate in a matrix, a sensor circuit arranged between rows of the plurality of pixel electrodes and configured to read out intensity of capacitive coupling between the sensor circuit and a dielectric, and a counter electrode drive circuit configured to pulsatively drive a common voltage added to the counter electrode during a period of driving the sensor circuit, wherein the sensor circuit comprises a detection electrode configured to form capacitance between the sensor circuit and the dielectric and to form capacitance between the sensor circuit and the counter electrode, and wherein the counter electrode comprises an aperture including at least a portion opposed to the detection electrode.
    Type: Application
    Filed: April 21, 2014
    Publication date: November 13, 2014
    Applicant: Japan Display Inc.
    Inventors: Miyuki ISHIKAWA, Masahiro Tada, Takashi Nakamura, Yutaka Umeda, Hirotaka Hayashi, Yoshiro Aoki, Takanori Tsunashima
  • Publication number: 20140210777
    Abstract: According to one embodiment, a display device includes a display pixel allocated at a matrix state in a display area, an image-reading device which detects strength of capacitive coupling by a dielectric material coming close to or making contact with the display area, and a control portion which controls each transistor of the image-reading device. The image-reading device includes a detection electrode which forms capacitance between the detection electrode and the dielectric material, a pre-charge gate line, a coupling pulse line, a readout gate line, a pre-charge line and a readout line. These lines supply a signal which drives the image-reading device. The image-reading device further includes a pre-charge transistor, an amplification transistor, a readout transistor, a compensation transistor, and a power-source switching transistor.
    Type: Application
    Filed: January 10, 2014
    Publication date: July 31, 2014
    Applicant: Japan Display Inc.
    Inventors: Keiichi SAITO, Hideyuki Takahashi, Takashi Nakamura, Satoru Tomita, Masahiro Tada, Hirotaka Hayashi, Takashi Okada, Yoshiro Aoki, Takanori Tsunashima
  • Patent number: 8305327
    Abstract: Provided is a waveform processing circuit including: an amplitude expansion circuit configured to expand amplitude of an analog video signal; a voltage shifting circuit configured to shift a voltage of the analog video signal; and an impedance conversion circuit having an output impedance lower than that of the voltage shifting circuit.
    Type: Grant
    Filed: May 19, 2009
    Date of Patent: November 6, 2012
    Assignee: Toshiba Manufacturing Display Technology Co., Ltd.
    Inventors: Yoshiro Aoki, Takanori Tsunashima
  • Publication number: 20120242634
    Abstract: According to one embodiment, a display apparatus includes signal lines, and pixels. Each of the pixels includes a pixel electrode and a pixel control switch, and being classified into any of pixel groups. Each of the pixel groups includes a memory, and a sensor circuit which is configured to provide data for a detection signal to the memory when detecting the input information. The pixel control switch is configured to switch the voltage level of the pixel electrode in accordance with data for the display signal input via the signal line and the data for the detection signal input from the memory.
    Type: Application
    Filed: March 21, 2012
    Publication date: September 27, 2012
    Inventors: Satoshi MARUYAMA, Takanori TSUNASHIMA, Hiroyuki KIMURA, Kenji HARADA, Hirotaka HAYASHI
  • Publication number: 20120081499
    Abstract: According to one embodiment, a print head includes first and second substrates, an OLED array and a drive circuit. The first substrate extending in a first direction and has a main surface including first to third regions. The first region extends in the first direction. The second and third regions are arranged in a second direction crossing the first direction with the first region interposed between the second and third regions. The OLED array includes first electrodes arranged above the first region, an organic emitting layer positioned above the first electrodes, and a second electrode positioned above the organic emitting layer. The drive circuit is configured to supply drive currents to the first electrodes and includes a first circuit positioned above the third region and a second circuit positioned above the third region.
    Type: Application
    Filed: July 18, 2011
    Publication date: April 5, 2012
    Applicant: Toshiba Mobile Display Co., Ltd.
    Inventors: Takanori TSUNASHIMA, Yoshiro Aoki
  • Publication number: 20090289888
    Abstract: Provided is a waveform processing circuit including: an amplitude expansion circuit configured to expand amplitude of an analog video signal; a voltage shifting circuit configured to shift a voltage of the analog video signal; and an impedance conversion circuit having an output impedance lower than that of the voltage shifting circuit.
    Type: Application
    Filed: May 19, 2009
    Publication date: November 26, 2009
    Inventors: Yoshiro AOKI, Takanori TSUNASHIMA
  • Publication number: 20090179847
    Abstract: A liquid crystal display apparatus includes a plurality of source lines and gate lines, pixel switching elements, and a plurality of drive circuits, each provided for a group of a predetermined number of source lines, and converting i-bit data video signal into an analog gradation signal and supplying the analog gradation signal to each of the source lines, the liquid crystal display apparatus performing gradation display with an ith power of 2, based on i-bit data, wherein the drive circuits each include a first switching circuit which selects the video signal, a digital to analog conversion circuit DAC which converts the video signal into the gradation signal, a second switching circuit which supplies the gradation signal to each source line, and a control circuit which controls an order of supplying the gradation signal to each source line to be different every n horizontal period and every m vertical period.
    Type: Application
    Filed: December 23, 2008
    Publication date: July 16, 2009
    Inventors: Kenji HARADA, Takanori TSUNASHIMA, Hiroyuki KIMURA, Koji SHIGEHIRO