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: 20200152159
    Abstract: A display device includes: sub-pixels each including a memory block including memories; memory selection line groups each including memory selection lines electrically coupled to the memory blocks in the sub-pixels that belong to the corresponding row; a memory selection circuit configured to concurrently output memory selection signals to the memory selection line groups; a potential line; a conduction switch provided for at least one memory in the memory block on a one-to-one basis; and an operating-memory conduction circuit configured to output, to the conduction switch, an operation signal for determining whether to electrically couple or uncouple the potential line and the corresponding one memory. Each memory is capable of storing sub-pixel data therein when being coupled to the potential line. Each sub-pixel displays an image based on the sub-pixel data stored in one memory in the sub-pixel according to the memory selection line supplied with the memory selection signal.
    Type: Application
    Filed: January 9, 2020
    Publication date: May 14, 2020
    Inventors: Masaya TAMAKI, Yutaka MITSUZAWA, Takayuki NAKAO, Yutaka OZAWA
  • Patent number: 10635250
    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: Grant
    Filed: July 25, 2018
    Date of Patent: April 28, 2020
    Assignee: Japan Display Inc.
    Inventors: Takayuki Nakanishi, Masaya Tamaki, Tatsuya Yata
  • Patent number: 10634959
    Abstract: According to one embodiment, a liquid crystal display comprising a first substrate, a second substrate opposed the first substrate, a liquid crystal layer between the first substrate and the second substrate, a light-shielding layer including a first light-shield formed along a first direction and a second light-shield formed along a second direction and crossing the first light-shield, and a spacer which maintains a gap between the first substrate and the second substrate, the spacer overlapping a crossing region where the first light-shield and the second light-shield cross each other and including an exposed region outside the light-shielding layer in a planar view.
    Type: Grant
    Filed: December 17, 2018
    Date of Patent: April 28, 2020
    Assignee: Japan Display Inc.
    Inventor: Masaya Tamaki
  • Publication number: 20200103692
    Abstract: According to one embodiment, a display device includes a driver, a pixel circuit disposed to be apart from the driver in a plan view and to be electrically connected to the driver, a first pixel electrode disposed to overlap the pixel circuit in a plan view and to be electrically connected to the pixel circuit, a second pixel electrode disposed to overlap the driver in a plan view and to be closer to an outer edge of a display area than the first pixel electrode, and a relay line disposed between the pixel circuit and the first pixel electrode and between the driver and the second pixel electrode, the relay line electrically connecting the first pixel electrode and the second pixel electrode.
    Type: Application
    Filed: December 3, 2019
    Publication date: April 2, 2020
    Inventor: Masaya Tamaki
  • Patent number: 10578932
    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: November 23, 2016
    Date of Patent: March 3, 2020
    Assignee: Japan Display Inc.
    Inventors: Masaya Tamaki, Toshiharu Matsushima
  • Patent number: 10559286
    Abstract: A display device includes: sub-pixels each including a memory block including memories; memory selection line groups each including memory selection lines electrically coupled to the memory blocks in the sub-pixels that belong to the corresponding row; a memory selection circuit configured to concurrently output memory selection signals to the memory selection line groups; a potential line; a conduction switch provided for at least one memory in the memory block on a one-to-one basis; and an operating-memory conduction circuit configured to output, to the conduction switch, an operation signal for determining whether to electrically couple or uncouple the potential line and the corresponding one memory. Each memory is capable of storing sub-pixel data therein when being coupled to the potential line. Each sub-pixel displays an image based on the sub-pixel data stored in one memory in the sub-pixel according to the memory selection line supplied with the memory selection signal.
    Type: Grant
    Filed: August 8, 2018
    Date of Patent: February 11, 2020
    Assignee: Japan Display Inc.
    Inventors: Masaya Tamaki, Yutaka Mitsuzawa, Takayuki Nakao, Yutaka Ozawa
  • Patent number: 10553167
    Abstract: A display device includes: a plurality of sub-pixels each including a memory block; a clock signal output circuit configured to output a plurality of clock signals having different frequencies; a selection circuit configured to select one of the clock signals as a selected clock signal; a plurality of memory selection line groups provided for respective rows; a memory selection circuit configured to output a memory selection signal concurrently to the memory selection line groups in synchronization with the selected clock signal, the memory selection signal being a signal for selecting one from a plurality of memories in each of the memory blocks; a common electrode to which a common potential common to the sub-pixels is supplied; and a common-electrode driving circuit configured to switch the common potential in synchronization with the reference clock signal and output the switched common potential.
    Type: Grant
    Filed: June 27, 2018
    Date of Patent: February 4, 2020
    Assignee: Japan Display Inc.
    Inventors: Yutaka Mitsuzawa, Takayuki Nakao, Yutaka Ozawa, Masaya Tamaki
  • Patent number: 10539843
    Abstract: According to one embodiment, a display device includes a driver, a pixel circuit disposed to be apart from the driver in a plan view and to be electrically connected to the driver, a first pixel electrode disposed to overlap the pixel circuit in a plan view and to be electrically connected to the pixel circuit, a second pixel electrode disposed to overlap the driver in a plan view and to be closer to an outer edge of a display area than the first pixel electrode, and a relay line disposed between the pixel circuit and the first pixel electrode and between the driver and the second pixel electrode, the relay line electrically connecting the first pixel electrode and the second pixel electrode.
    Type: Grant
    Filed: July 21, 2017
    Date of Patent: January 21, 2020
    Assignee: Japan Display Inc.
    Inventor: Masaya Tamaki
  • Patent number: 10527893
    Abstract: A pixel array substrate structure includes: first and second planarizing films sequentially stacked on a substrate where a circuit unit is formed; and a relay wire formed between the first and second planarizing films, in which the relay wire electrically connects a first contact portion formed on the first planarizing film and connected to the circuit unit with a second contact portion formed at a position different from the first contact portion when seen from above, on the second planarizing film.
    Type: Grant
    Filed: March 13, 2018
    Date of Patent: January 7, 2020
    Assignee: Japan Display Inc.
    Inventors: Koichi Nagasawa, Masaya Tamaki, Shuji Hayashi, Masaaki Kabe, Yoko Fukunaga
  • Publication number: 20200004071
    Abstract: According to one embodiment, a display device includes a driver, a first pixel circuit disposed apart from the driver in plan view but electrically connected to the driver, a second pixel circuit separated further from the driver than the first pixel circuit in plan view but electrically connected to the driver, a first pixel electrode overlapping the driver in plan view, a second pixel electrode overlapping the first pixel circuit in plan view, a first relay line electrically connecting the first pixel circuit and the first pixel electrode to each other, and a second relay line electrically connecting the second pixel circuit and the second pixel electrode to each other.
    Type: Application
    Filed: September 12, 2019
    Publication date: January 2, 2020
    Inventors: Masaya Tamaki, Akihiko Saitoh
  • Patent number: 10522095
    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: Grant
    Filed: August 24, 2016
    Date of Patent: December 31, 2019
    Assignee: Japan Display Inc.
    Inventors: Tatsuya Yata, Takayuki Nakanishi, Masaya Tamaki
  • Patent number: 10509521
    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: Grant
    Filed: March 29, 2018
    Date of Patent: December 17, 2019
    Assignee: Japan Display Inc.
    Inventors: Masaya Tamaki, Takayuki Nakanishi, Tatsuya Yata
  • Patent number: 10459262
    Abstract: According to one embodiment, a display device includes a driver, a first pixel circuit disposed apart from the driver in plan view but electrically connected to the driver, a second pixel circuit separated further from the driver than the first pixel circuit in plan view but electrically connected to the driver, a first pixel electrode overlapping the driver in plan view, a second pixel electrode overlapping the first pixel circuit in plan view, a first relay line electrically connecting the first pixel circuit and the first pixel electrode to each other, and a second relay line electrically connecting the second pixel circuit and the second pixel electrode to each other.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: October 29, 2019
    Assignee: Japan Display Inc.
    Inventors: Masaya Tamaki, Akihiko Saitoh
  • Patent number: 10437114
    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: Grant
    Filed: November 30, 2016
    Date of Patent: October 8, 2019
    Assignee: Japan Display Inc.
    Inventors: Masaya Tamaki, Hirotaka Hayashi
  • 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
  • Patent number: 10359664
    Abstract: A display device includes a display surface with pixels including four sub-pixels of four colors, and being arrayed in a matrix of a first viewing angle direction and a second viewing angle direction orthogonal thereto. The first viewing angle direction in a direction parallel to the display surface of a main viewing angle direction that intersects with the display surface. A reflective member, first substrate, a second substrate facing the first substrate, a color filter with filters of four colors corresponding to the four sub-pixels, and a scattering member is provided on the second substrate. For the color filter, a change in transmittance of the filters per pixel in the main viewing angle direction is smaller than a change in transmittance of the filters per pixel in a direction orthogonal to the first viewing angle direction in the second viewing angle direction parallel to the display surface.
    Type: Grant
    Filed: April 18, 2018
    Date of Patent: July 23, 2019
    Assignee: Japan Display Inc.
    Inventors: Masaya Tamaki, Yoko Fukunaga, Masashi Mitsui, Susumu Kimura
  • Patent number: 10330967
    Abstract: In a display device, a plurality of display panels displaying an image formed by a plurality of pixels are coupled to each other. Each of the display panels includes a display surface having a display region and a non-display region surrounding the display region, and a polarizer provided on the display surface. The polarizer covers the display region and a part of the polarizer extends to the non-display region. A pair of display panels to be coupled to each other are arranged such that parts of the non-display regions overlap with each other. One display panel is located at a display surface side of the other display panel, and the other display panel is located at a rear surface side of the one display panel, the rear surface side being an opposite side to the display surface side.
    Type: Grant
    Filed: December 19, 2016
    Date of Patent: June 25, 2019
    Assignee: Japan Display Inc.
    Inventors: Masaya Tamaki, Shinji Fujisawa
  • 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: 10297206
    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: Grant
    Filed: February 10, 2016
    Date of Patent: May 21, 2019
    Assignee: Japan Display Inc.
    Inventors: Tatsuya Yata, Takayuki Nakanishi, Masaya Tamaki
  • 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