Patents by Inventor Masaya Tamaki

Masaya Tamaki 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: 20170153513
    Abstract: According to one embodiment, a display device includes a unit pixel including first to fourth sub-pixels exhibiting different colors, each of the first to fourth sub-pixels includes first to third segments for displaying 3-bit gradation, the first segment being a rectangular region including first to fourth sides, the second segment being an L-letter region located on a side closer to a geometric center of the unit pixel than the first segment and formed along the first and second sides which intersect each other, the third segment being an L-letter region located on a side farther from the geometric center than the first segment and formed along the third and fourth sides which intersect each other.
    Type: Application
    Filed: November 30, 2016
    Publication date: June 1, 2017
    Inventors: Masaya TAMAKI, Hirotaka HAYASHI
  • Patent number: 9599854
    Abstract: According an aspect, a liquid crystal display device includes: a first substrate on which a reflective electrode is arranged for each of a plurality of pixels; a second substrate; a liquid crystal layer arranged between the first substrate and the second substrate; and a wave plate in which liquid crystals are fixed so that an alignment direction of the liquid crystals is opposite to an alignment direction of the liquid crystal layer. The wave plate is arranged on a second substrate side of the liquid crystal layer.
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: March 21, 2017
    Assignee: Japan Display Inc.
    Inventors: Masaya Tamaki, Masashi Mitsui
  • Publication number: 20170075177
    Abstract: According to an aspect, a liquid crystal display device includes: a first substrate and a second substrate that face each other; a liquid crystal layer provided between the first substrate and the second substrate; and a first electrode and a second electrode provided between the first substrate and the liquid crystal layer. The first electrode includes: at least an electrode base portion that extends in a first direction; and a plurality of comb-shaped portions that protrude from the electrode base portion at a fixed distance away from each other, and extend in a second direction different from the first direction. Each comb-shaped portion has a coupling portion layered on or under the electrode base portion.
    Type: Application
    Filed: November 23, 2016
    Publication date: March 16, 2017
    Inventors: Masaya Tamaki, Toshiharu Matsushima
  • Publication number: 20170061903
    Abstract: According to an aspect, a display device includes a display unit, an illumination unit, a measurement unit, and a control unit. When pixels that are expected to perform display output at identical luminance are adjacent to each other in adjacent partial regions, and when a difference in the intensity of the internal light between light emitting regions corresponding to the adjacent partial regions is equal to or larger than a predetermined threshold, the control unit performs correction to increase luminance of a predetermined number of pixels belonging to a first partial region corresponding to a first light emitting region the intensity of the internal light from which is lower among the adjacent partial regions. The predetermined number of pixels are located closer to a second partial region corresponding to a second light emitting region the intensity of the internal light from which is higher among the adjacent partial regions.
    Type: Application
    Filed: August 24, 2016
    Publication date: March 2, 2017
    Inventors: Tatsuya Yata, Takayuki Nakanishi, Masaya Tamaki
  • Publication number: 20170045786
    Abstract: According to an aspect, a display device includes a plurality of pixels each including a plurality of sub-pixels. Each of the sub-pixels is arranged around center of the corresponding pixel and divided into a plurality of display regions to perform N-bit area coverage modulation by a combination of the display regions. The display regions are arranged in such a manner that: a display region corresponding to a least significant bit of the area coverage modulation is arranged closest to the center of the corresponding pixel; and a display region corresponding to a higher significant bit of the area coverage modulation is arranged around the center of the pixel and further from the center of the corresponding pixel (N is a natural number of 2 or more).
    Type: Application
    Filed: October 28, 2016
    Publication date: February 16, 2017
    Inventors: Masaya Tamaki, Yoko Fukunaga
  • Publication number: 20170047020
    Abstract: According to an aspect, a display device includes: a display unit a plurality of pixels performing that perform color reproduction by combining outputs of sub-pixels; an illumination unit including a first light source, a second light source, and a third light source; a measuring unit that measures intensity of light included in external light other than the light from the illumination unit; and a control unit that controls the intensity of the light to be emitted from each of the first light source, the second light source, and the third light source and controls gradation values of the respective sub-pixels based on the intensity of the external light measured by the measuring unit.
    Type: Application
    Filed: July 21, 2016
    Publication date: February 16, 2017
    Inventors: Tatsuya YATA, Takayuki NAKANISHI, Masaya TAMAKI
  • Publication number: 20170018218
    Abstract: A display apparatus including a display section including an array of pixels in a two-dimensional matrix, wherein each of the pixels of the display section includes a pair of a subpixel displaying a first primary color, and a subpixel displaying a second primary color being different from the first primary color.
    Type: Application
    Filed: September 15, 2016
    Publication date: January 19, 2017
    Inventor: Masaya Tamaki
  • Patent number: 9529238
    Abstract: According to an aspect, a liquid crystal display device includes: a first substrate and a second substrate that face each other; a liquid crystal layer provided between the first substrate and the second substrate; and a first electrode and a second electrode provided between the first substrate and the liquid crystal layer. The first electrode includes: at least an electrode base portion that extends in a first direction; and a plurality of comb-shaped portions that protrude from the electrode base portion at a fixed distance away from each other, and extend in a second direction different from the first direction. Each comb-shaped portion has a coupling portion layered on or under the electrode base portion.
    Type: Grant
    Filed: March 26, 2014
    Date of Patent: December 27, 2016
    Assignee: Japan Display Inc.
    Inventors: Masaya Tamaki, Toshiharu Matsushima
  • Publication number: 20160349907
    Abstract: According to one embodiment, a sensor-equipped display device includes a display panel, a detection electrode, a conductive member arranged at intervals from the display panel and the detection electrode, and controller. In a first sense period, the controller drives a common electrode of the display panel or the detection electrode and extracts input position data from the detection electrode. In a second sense period, the controller drives the conductive member and extracts first input pressure data from a first electrode, the controller drives a second electrode and extracts second input pressure data from the conductive member, or the controller drives a third electrode and extracts third input pressure data from the third electrode.
    Type: Application
    Filed: May 24, 2016
    Publication date: December 1, 2016
    Inventors: Kazuyuki Kobayashi, Hayato Kurasawa, Hiroshi Mizuhashi, Masaya Tamaki, Takeo Koito, Koji Noguchi
  • Patent number: 9507203
    Abstract: According to an aspect, a display device includes a plurality of pixels each including a plurality of sub-pixels. Each of the sub-pixels is arranged around center of the corresponding pixel and divided into a plurality of display regions to perform N-bit area coverage modulation by a combination of the display regions. The display regions are arranged in such a manner that: a display region corresponding to a least significant bit of the area coverage modulation is arranged closest to the center of the corresponding pixel; and a display region corresponding to a higher significant bit of the area coverage modulation is arranged around the center of the pixel and further from the center of the corresponding pixel (N is a natural number of 2 or more).
    Type: Grant
    Filed: March 5, 2014
    Date of Patent: November 29, 2016
    Assignee: Japan Display Inc.
    Inventors: Masaya Tamaki, Yoko Fukunaga
  • Publication number: 20160342006
    Abstract: According to an aspect, a semi-transmissive liquid crystal display device includes a plurality of pixels arranged in a matrix, a plurality of reflective electrodes, a counter electrode facing the reflective electrode, and a liquid crystal layer. The reflective electrodes are provided for each of the pixels, and each of them includes a plurality of electrodes, with a combination of the areas of which area coverage modulation is performed by using n bits. The electrodes are configured such that a ratio of the sum of the perimeter(s) of electrode(s) corresponding to each bit of the n bits satisfies 1:2: . . . : 2n-1. The liquid crystal layer is provided between the reflective electrode and the counter electrode. The semi-transmissive liquid crystal display device is configured to carry out reflective display using the reflective electrode and carry out transmissive display using at least a space of the reflective electrode between the pixels.
    Type: Application
    Filed: August 1, 2016
    Publication date: November 24, 2016
    Inventors: Masaya TAMAKI, Kazuyuki MAEDA
  • Publication number: 20160320903
    Abstract: An input device includes a first substrate, a light-emitting element unit, and third conductive layers. The first substrate includes first and second surfaces. The light-emitting element unit includes: first conductive layers formed in one layer on the second surface side; second conductive layers formed in one layer on the second surface side different from the layer of the first conductive layers; and a luminescent layer provided between the first and the second conductive layers and electrically in contact therewith. The third conductive layers are formed to be insulated from the first and the second conductive layers and not to intersect with the second conductive layers in planar view, and are configured to detect a change in an electric field between the first and the third conductive layers depending on coordinates of a proximity object at a position overlapping with the first conductive layers and the first surface in planar view.
    Type: Application
    Filed: April 29, 2016
    Publication date: November 3, 2016
    Inventors: Takayuki NAKANISHI, Tatsuya Yata, Masaya Tamaki
  • Patent number: 9478158
    Abstract: A display apparatus including a display section including an array of pixels in a two-dimensional matrix, wherein each of the pixels of the display section includes a pair of a subpixel displaying a first primary color, and a subpixel displaying a second primary color being different from the first primary color.
    Type: Grant
    Filed: May 22, 2015
    Date of Patent: October 25, 2016
    Assignee: JAPAN DISPLAY INC.
    Inventor: Masaya Tamaki
  • Publication number: 20160291736
    Abstract: An input device includes a first substrate, a light-emitting element, and a third electrode unit. The first substrate has first and second surfaces. The light-emitting element unit includes: a first conductive electrode unit including first conductive layers; a second conductive electrode unit including second conductive layers each having a size overlapping with the first conductive layer in planar view; and luminescent layers conducted with at least a part of the first electrode unit, each provided between the first and second electrode units and conducted with the first conductive layer and the second conductive layer overlapping with the first conductive layer in planar view. The third electrode unit is insulated from the first conductive layers and detects a change in an electric field between the first conductive layers and the third electrode unit depending on coordinates of a proximity object at a position overlapping with the first surface in planar view.
    Type: Application
    Filed: March 25, 2016
    Publication date: October 6, 2016
    Inventors: Masaya TAMAKI, Takayuki NAKANISHI, Tatsuya YATA
  • Publication number: 20160291735
    Abstract: An input device includes a first substrate, a first light-emitting element unit, and a third electrode unit. The first substrate has a first surface and a second surface. The first light-emitting element includes a first electrode unit formed on the second surface, a second electrode unit formed in a layer different from that of the first electrode unit, and a luminescent layer electrically in contact with at least a part of the first electrode unit and a part of the second electrode unit, and formed between the first electrode unit and the second electrode unit. The third electrode unit is insulated from the first electrode unit and detects a change in an electric field between the first electrode unit and the third electrode unit depending on coordinates of a proximity object present at a position overlapping with the first surface in planar view.
    Type: Application
    Filed: March 25, 2016
    Publication date: October 6, 2016
    Inventors: Takayuki NAKANISHI, Masaya TAMAKI, Tatsuya YATA
  • Publication number: 20160284288
    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: March 21, 2016
    Publication date: September 29, 2016
    Applicant: Japan Display Inc.
    Inventors: Masaya TAMAKI, Tsutomu HARADA, Hirotaka HAYASHI
  • Publication number: 20160284290
    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: March 14, 2016
    Publication date: September 29, 2016
    Applicant: Japan Display Inc.
    Inventors: Masaya TAMAKI, Tsutomu HARADA, Hirotaka HAYASHI
  • Patent number: 9454035
    Abstract: According to an aspect, a transflective display device, includes a first substrate on which a first orientation film and a plurality of reflective electrodes formed for each of pixels are provided; a second substrate on which a second orientation film and a transparent electrode that is opposite to the reflective electrodes are provided; and a liquid crystal layer including a plurality of liquid crystal molecules provided between the first substrate and the second substrate. A direction of long axis of the liquid crystal molecules is parallel to surfaces of the first and second orientation films and twisted between the first substrate and the second substrate. The reflective electrode is configured to perform reflective display, and a space between the reflective electrodes of the adjacent pixels is configured to perform transmissive display.
    Type: Grant
    Filed: October 9, 2013
    Date of Patent: September 27, 2016
    Assignee: Japan Display Inc.
    Inventor: Masaya Tamaki
  • Publication number: 20160260388
    Abstract: According to an aspect, a display device includes: a display unit; a lighting unit emitting internal light; a measurement unit; and a control unit controlling an intensity of the internal light and a gradation value of each pixel in the display unit. The control unit calculates a required luminance value for a luminance value of a pixel to be N times as high as a luminance value indicated by an input signal, the pixel performing output with the largest gradation value out of the pixels in a predetermined image display region. The control unit determines the intensity of the internal light based on an intensity of the external light measured by the measurement unit and the required luminance value, and calculates an output gradation value based on the gradation value indicated by input signal, the intensity of the external light, and the intensity of the internal light.
    Type: Application
    Filed: February 10, 2016
    Publication date: September 8, 2016
    Inventors: Tatsuya YATA, Takayuki NAKANISHI, Masaya TAMAKI
  • Patent number: 9436047
    Abstract: According to an aspect, a semi-transmissive liquid crystal display device includes a plurality of pixels arranged in a matrix, a plurality of reflective electrodes, a counter electrode facing the reflective electrode, and a liquid crystal layer. The reflective electrodes are provided for each of the pixels, and each of them includes a plurality of electrodes, with a combination of the areas of which area coverage modulation is performed by using n bits. The electrodes are configured such that a ratio of the sum of the perimeter(s) of electrode(s) corresponding to each bit of the n bits satisfies 1:2: . . . :2n?1. The liquid crystal layer is provided between the reflective electrode and the counter electrode. The semi-transmissive liquid crystal display device is configured to carry out reflective display using the reflective electrode and carry out transmissive display using at least a space of the reflective electrode between the pixels.
    Type: Grant
    Filed: August 19, 2015
    Date of Patent: September 6, 2016
    Assignee: Japan Display Inc.
    Inventors: Masaya Tamaki, Kazuyuki Maeda