Patents by Inventor Tsutomu Harada

Tsutomu Harada 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).

  • Publication number: 20190237032
    Abstract: According to one embodiment, a display device, includes a first pixel line including a first sub-pixel and a second sub-pixel, a second pixel line including a third sub-pixel and a fourth sub-pixel, and a display driver supplying video signals which cause signal polarities of signal lines adjacent to each other to be opposite to each other, without varying the polarities in one frame period, the video signals having the same polarities as each other being written to the respective sub-pixels of the first pixel line, the video signals having the polarities which are the same as each other and opposite to the polarities of the video signals written to the first pixel line, being written to the respective sub-pixels of the second pixel line.
    Type: Application
    Filed: April 10, 2019
    Publication date: August 1, 2019
    Applicant: Japan Display Inc.
    Inventors: Masaya TAMAKI, Tsutomu HARADA, Hirotaka HAYASHI
  • Publication number: 20190221168
    Abstract: According to an aspect, a display device includes a display unit including a plurality of pixels, a light source device that emits light that illuminates the display unit, and a controller that controls operation of the light source device. The controller does not lower luminance of the light for a second predetermined time or longer after the controller has raised the luminance of the light by a predetermined amount of luminance change or more within a first predetermined time.
    Type: Application
    Filed: January 15, 2019
    Publication date: July 18, 2019
    Inventors: Kazuhiko SAKO, Tsutomu HARADA, Naoyuki TAKASAKI, Toshiyuki NAGATSUMA
  • Patent number: 10345508
    Abstract: According to one embodiment, an illumination device includes a light source, clad, and a plurality of cores. The clad includes a first edge at a light source side, a second edge opposite to the first edge, and a plurality of grooves formed by a plurality of partitions extending in parallel to each other from the first edge to the second edge. The cores are accommodated in the grooves, and each core includes an incident surface on which light from the light source is incident and an exit surface exposed from the groove to emit the light incident on the incident surface.
    Type: Grant
    Filed: January 25, 2018
    Date of Patent: July 9, 2019
    Assignee: Japan Display Inc.
    Inventors: Shigenori Aoki, Susumu Kimura, Tsutomu Harada, Naoyuki Takasaki
  • Patent number: 10341538
    Abstract: A display system includes a controller and an image display panel. The controller includes a signal transmitter configured to output at least a vertical synchronization signal to a plurality of image-capturing apparatuses; and a synthesizer configured to provide synthesized image signals in units of lines obtained by synthesizing, in units of lines, image signals in units of lines output from the respective image-capturing apparatuses at a timing corresponding to a horizontal synchronization signal formed in a predetermined cycle based on an output timing of the vertical synchronization signal. The image display panel is configured to display sequentially, in units of lines, the synthesized image signals in units of lines.
    Type: Grant
    Filed: November 28, 2017
    Date of Patent: July 2, 2019
    Assignee: Japan Display Inc.
    Inventors: Tsutomu Harada, Kazunori Yamaguchi, Akira Sakaigawa, Fumitaka Gotoh
  • Patent number: 10332465
    Abstract: According to one embodiment, a display device, includes a first pixel line including a first sub-pixel and a second sub-pixel, a second pixel line including a third sub-pixel and a fourth sub-pixel, and a display driver supplying video signals which cause signal polarities of signal lines adjacent to each other to be opposite to each other, without varying the polarities in one frame period, the video signals having the same polarities as each other being written to the respective sub-pixels of the first pixel line, the video signals having the polarities which are the same as each other and opposite to the polarities of the video signals written to the first pixel line, being written to the respective sub-pixels of the second pixel line.
    Type: Grant
    Filed: March 14, 2016
    Date of Patent: June 25, 2019
    Assignee: Japan Display Inc.
    Inventors: Masaya Tamaki, Tsutomu Harada, Hirotaka Hayashi
  • Patent number: 10324559
    Abstract: A display device unit includes a plurality of image display panels in such a manner that display surfaces of the plurality of image display panels are orderly arranged on a flat surface, and is configured to display an image using the plurality of display surfaces as a single screen. The image display panel includes a drive electrode unit to which an application voltage is applied and a detection electrode unit at which a detection voltage is generated in accordance with the application voltage. The application voltage is applied solely to the drive electrode unit included in an application image display panel which is a part of the image display panels.
    Type: Grant
    Filed: August 22, 2016
    Date of Patent: June 18, 2019
    Assignee: Japan Display Inc.
    Inventors: Shinya Iuchi, Hayato Kurasawa, Masahiro Togashi, Tsutomu Harada, Yuji Suzuki
  • Patent number: 10310684
    Abstract: A touch sensor that may detect an object away from the sensor is provided. The touch sensor includes one or more drive electrodes; one or more detection electrodes forming capacitance in cooperation with the respective drive electrodes; a detection circuit applying drive signals to the respective drive electrodes to detect the object based on detection signals obtained from the respective detection electrodes in response to the respective drive signals; and a controller controlling to change a range of electric flux lines generated between the drive electrodes and the detection electrodes.
    Type: Grant
    Filed: September 19, 2016
    Date of Patent: June 4, 2019
    Assignee: Japan Display Inc.
    Inventors: Koji Ishizaki, Kouji Noguchi, Tsutomu Harada, Takeya Takeuchi, Yoshitoshi Kida, Takayuki Nakanishi
  • Publication number: 20190162960
    Abstract: According to one embodiment, a display device includes a display panel, a backlight device including a plurality of light sources, to irradiate light to the display panel, and an optical element provided on an emission side of the display panel and inclined with respect to a direction perpendicular to an optical axis of the display panel.
    Type: Application
    Filed: November 27, 2018
    Publication date: May 30, 2019
    Inventors: Tsutomu HARADA, Shigenori AOKI, Koji YOSHIDA, Masayuki MIFUNE, Kazunori YAMAGUCHI
  • Patent number: 10297212
    Abstract: A display device includes an image display panel on which pixels are arranged, a backlight which lights the image display panel from a rear of the image display panel, a first device which controls the backlight, and a second device which controls the image display panel. The first device generates an image signal, outputs the image signal to the second device, determines a light source lighting amount of the backlight on the basis of the image signal by blocks obtained by dividing a display surface of the image display panel and luminance distribution information on the backlight stored in advance, and controls the backlight by the light source lighting amount. The second device acquires the image signal, converts the image signal to a display signal for controlling display of the image display panel, and controls the image display panel.
    Type: Grant
    Filed: March 25, 2015
    Date of Patent: May 21, 2019
    Assignee: Japan Display Inc.
    Inventors: Kazuhiko Sako, Tsutomu Harada
  • Patent number: 10297231
    Abstract: According to an aspect, a display apparatus includes: an image display panel including a plurality of pixels and displaying an image; and a signal processor generating a second signal by multiplying signal values for a plurality of sub-pixels making up each of the plurality of pixels by a gain, the signal values being included in a first signal that is an input signal of the image. The the signal processor calculates a luminance of each of the plurality of pixels based on the signal values of the sub-pixels included in the respective pixels. The signal processor increases the gain by which the signal values of the sub-pixels of the pixel having a luminance greater than a first luminance threshold are multiplied, in accordance with the luminance of the corresponding pixel.
    Type: Grant
    Filed: August 15, 2017
    Date of Patent: May 21, 2019
    Assignee: Japan Display Inc.
    Inventors: Kazuhiko Sako, Kazunari Tomizawa, Tsutomu Harada, Naoyuki Takasaki, Tae Kurokawa
  • Publication number: 20190130854
    Abstract: According to one embodiment, a display device, includes a first main pixel including first to third sub-pixels, a second main pixel including fourth to sixth sub-pixels, a display driver which produces video signals to be written to the respective sub-pixels of the first and second main pixels and supplies the video signals to the respective sub-pixels via signal lines, any one of the first to third sub-pixels and any one of the fourth to sixth sub-pixels sharing one of the signal lines.
    Type: Application
    Filed: December 26, 2018
    Publication date: May 2, 2019
    Applicant: Japan Display Inc.
    Inventors: Masaya TAMAKI, Tsutomu Harada, Hirotaka Hayashi
  • Patent number: 10269313
    Abstract: In a display device, pixels each including first to fourth subpixels that respectively display first to third primary colors and fourth color are arranged on an image display panel. A lighting unit emits light to the panel from the rear thereof. A control unit calculates a required luminance value for each block of the display surface of the panel based on an input image signal, determines a light source lighting amount of the lighting unit based on luminance distribution information on the lighting unit so as to satisfy the required luminance value, generates luminance information on each pixel based on the luminance distribution information and light source lighting amount, generates an output image signal that drives the subpixels based on the luminance information and input image signal, controls the lighting unit by the light source lighting amount, and controls the panel by the output image signal.
    Type: Grant
    Filed: April 20, 2017
    Date of Patent: April 23, 2019
    Assignee: Japan Display Inc.
    Inventors: Tsutomu Harada, Naoyuki Takasaki, Akira Sakaigawa, Amane Higashi
  • Publication number: 20190107754
    Abstract: According to an aspect, a display device includes: a display panel having a display area including a plurality of pixels; and an illuminator provided so as to overlap the display panel and configured to illuminate the display area. The illuminator has a plurality of segment blocks set in different positions in the display area. Each of the segment blocks is provided such that the luminance of the segment block is individually controlled. At least one of the segment blocks satisfies a predetermined condition. The predetermined condition is such that at least two light source rows each including a plurality of light sources arranged in a first direction are arranged in a second direction intersecting the first direction, and that none of the light sources included in the two light source rows adjacent in the second direction are in the same straight line along the second direction.
    Type: Application
    Filed: October 3, 2018
    Publication date: April 11, 2019
    Inventors: Kazuhiko SAKO, Tsutomu HARADA
  • Publication number: 20190094620
    Abstract: According to one embodiment, a display device includes a backlight device including a plurality of light sources, a display panel disposed to oppose the backlight device and incline with respect to a direction perpendicular to an optical axis of the backlight device and a diffusion plate provided between the display panel and the backlight device.
    Type: Application
    Filed: September 26, 2018
    Publication date: March 28, 2019
    Inventors: Tsutomu HARADA, Shigenori AOKI, Koji YOSHIDA, Masayuki MIFUNE
  • Patent number: 10229642
    Abstract: According to an aspect, the liquid crystal display device includes: an expansion coefficient determining unit that determines an expansion coefficient of each of partial areas based on a signal level of the first, the second, and the third colors; a luminance level determining unit that determines a luminance level of each partial area based on the signal level; a signal processing unit that uses the expansion coefficient to expand the signal level; and a light source control unit that controls brightness of a light source based on the expansion coefficient and the luminance level. The light source can change the brightness of the partial areas individually. The light source control unit controls the light source such that the brightness of the light source in a partial area having a luminance level equal to or higher than a predetermined threshold is higher than the brightness based on the expansion coefficient.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: March 12, 2019
    Assignee: Japan Display Inc.
    Inventors: Susumu Kimura, Fumitaka Gotoh, Naoyuki Takasaki, Tsutomu Harada
  • Publication number: 20190064559
    Abstract: According to an aspect, a display device includes: a display panel including a display area provided with pixels; an illuminator including an illumination area configured to emit light to the display panel such that the display area is illuminated from one surface side of the display panel; and a liquid crystal dimming panel overlapping the display panel, and including a dimming area configured to be adjusted in transmittance of the light emitted to another surface side of the display panel through the display area. The illumination area includes first segment regions configured such that luminance levels thereof are individually adjusted. The dimming area includes second segment regions configured such that the light transmittances thereof are individually adjusted. Each of the first segment regions overlaps more than one of the second segment regions. Each of the second segment regions overlaps more than one of the pixels.
    Type: Application
    Filed: August 21, 2018
    Publication date: February 28, 2019
    Inventors: Tsutomu HARADA, Daichi SUZUKI, Kazuhiko SAKO, Naoyuki TAKASAKI, Kazunari TOMIZAWA
  • Patent number: 10210825
    Abstract: According to one embodiment, a display device, includes a first main pixel including first to third sub-pixels, a second main pixel including fourth to sixth sub-pixels, a display driver which produces video signals to be written to the respective sub-pixels of the first and second main pixels and supplies the video signals to the respective sub-pixels via signal lines, any one of the first to third sub-pixels and any one of the fourth to sixth sub-pixels sharing one of the signal lines.
    Type: Grant
    Filed: March 21, 2016
    Date of Patent: February 19, 2019
    Assignee: Japan Display Inc.
    Inventors: Masaya Tamaki, Tsutomu Harada, Hirotaka Hayashi
  • Publication number: 20190035339
    Abstract: According to an aspect, a display device includes a display panel comprising a plurality of pixels, a light guide plate, a light source configured to emit light from a lateral side of the light guide plate, a dimming panel, and a controller. The dimming panel comprises a plurality of dimming areas arranged in an emission direction of the light from the light source. The dimming areas are capable of individually changing transmittance of the light according to intensities of light required to display an image using the display panel. When adjacent two of the dimming areas differ in light transmittance from each other, the controller increases output gradation values of target pixels, the target pixels being located in a predetermined area extending from a boundary between the two dimming areas in one of the two dimming areas that has lower light transmittance.
    Type: Application
    Filed: July 19, 2018
    Publication date: January 31, 2019
    Inventors: Kazuhiko SAKO, Daichi SUZUKI, Naoyuki TAKASAKI, Tsutomu HARADA, Kojiro IKEDA
  • Patent number: 10185070
    Abstract: According to one embodiment, a light source device includes a light source element including a first light emitting element which emits light of a first wavelength and a second light emitting element which emits light of a second wavelength, a first wavelength conversion material which is excited by the light from the first light emitting element to emit light of a third wavelength, and a second wavelength conversion material which is excited by the light from the second light emitting element to emit light of a fourth wavelength, wherein cyan light produced by the light emission of the first light emitting element and magenta light produced by the light emission of the second light emitting element are emitted from the same light emitting surface.
    Type: Grant
    Filed: October 3, 2016
    Date of Patent: January 22, 2019
    Assignee: Japan Display Inc.
    Inventors: Susumu Kimura, Tsutomu Harada, Akira Sakaigawa
  • Publication number: 20190005869
    Abstract: An image processing device includes a noise output circuit outputting noise data having an adjusted noise amplitude according to a gradation of input data, a data synthesis circuit synthesizing noise data output from the noise output circuit and the input data, and an error diffusion process circuit configured to perform an error diffusion process on data synthesized and obtained from the data synthesis circuit.
    Type: Application
    Filed: June 14, 2018
    Publication date: January 3, 2019
    Applicant: Japan Display Inc.
    Inventors: Tadafumi Ozaki, Yuta Haga, Tsutomu Harada