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: 20230114708
    Abstract: According to an aspect, a display device includes: a first panel; a second panel disposed opposing one surface of the first panel; a light source configured to emit light to the other surface of the first panel; and an acquirer configured to acquire user information including information indicating at least one of a position of an eye and a position of a head of a user facing the second panel. The first panel includes light control pixels. The second panel includes pixels. Blurring processing is applied by which the light control pixel positioned around a pixel controlled to transmit light in accordance with an input image signal is caused to transmit light. A blurring area including the light control pixel to which the blurring processing is applied on the first panel corresponds to the position of the eye of the user or the position of the head of the user.
    Type: Application
    Filed: October 5, 2022
    Publication date: April 13, 2023
    Inventors: Tsutomu HARADA, Tomoyuki ISHIHARA
  • Publication number: 20230116488
    Abstract: According to an aspect, a display device includes: a first panel including pixels; a second panel including light control pixels; and a light source. When any of the pixels is controlled to transmit light in accordance with an input image signal, blurring processing is applied, a blurring area is formed, and light from the light source transmits through the blurring area and the pixel controlled to transmit light and is emitted from the first panel. When a straight line connecting a user viewpoint and the pixel controlled to transmit light has an angle relative to a normal to the first panel, a center of the blurring area is at a position shifted to a side opposite to a reference normal side relative to the normal to the first panel passing through a center of the pixel. The reference normal is a normal to the first panel passing through the viewpoint.
    Type: Application
    Filed: October 4, 2022
    Publication date: April 13, 2023
    Inventors: Tomoyuki ISHIHARA, Tsutomu HARADA
  • Patent number: 11605357
    Abstract: According to one embodiment, a display device includes a display panel including a first sub display area and a second sub display area, and an illumination device, wherein the illumination device includes a first light source opposed to the first sub display area, a second light source opposed to the second sub display area, and a partition positioned between the first and second light sources and the display panel, and the partition includes a first side surface surrounding the first light source, a second side surface surrounding the second light source, and a connector which connects the first side surface and the second side surface, and the connector is formed of curved surfaces, or two or more flat surfaces, or a combination of curved surfaces and flat surfaces.
    Type: Grant
    Filed: July 11, 2022
    Date of Patent: March 14, 2023
    Assignee: Japan Display Inc.
    Inventors: Shigenori Aoki, Tatsuya Yata, Tsutomu Harada
  • Publication number: 20230039923
    Abstract: According to one embodiment, in a display device a first panel includes a first polarizing plate, a second polarizing plate, and a first liquid crystal panel interposed between the first polarizing plate and the second polarizing plate, a second panel includes a third polarizing plate, a fourth polarizing plate, and a second liquid crystal panel interposed between the third polarizing plate and the fourth polarizing plat, and a polarizing plate, which is located second from a surface close to an illumination device and a surface closest to an observer, has an extinction ratio that is lower than that of each of the other polarizing plates.
    Type: Application
    Filed: October 25, 2022
    Publication date: February 9, 2023
    Applicant: Japan Display Inc.
    Inventors: Kazunari TOMIZAWA, Tsutomu HARADA, Junji KOBASHI, Shinichiro OKA, Yosuke HYODO
  • Patent number: 11573461
    Abstract: According to one embodiment, a display device includes a plurality of red subpixels, a plurality of green subpixels, and a plurality of blue subpixels, wherein, in a first direction, the red subpixel and the green subpixel, the green subpixel and the blue subpixel, and the blue subpixel and the red subpixel are arranged to be adjacent to each other, and in a second direction, the red subpixel and the blue subpixel, the blue subpixel and the green subpixel, and the green subpixel and the red subpixel are arranged to be adjacent to each other, and in the subpixels, as to subpixel columns adjacent to each other, when an image signal of the same gradation is input with respect to the subpixels of same color, brightness of one subpixel column is higher than that of another subpixel column.
    Type: Grant
    Filed: June 22, 2022
    Date of Patent: February 7, 2023
    Assignee: Japan Display Inc.
    Inventors: Kazunari Tomizawa, Tsutomu Harada
  • Publication number: 20230017680
    Abstract: According to one embodiment, a display device includes a display panel and a ring-shaped electrode. The display panel includes a display area for displaying an image, a plurality of first electrodes arranged to surround the display area, and at least one second electrode arranged to surround the plurality of first electrodes. The ring-shaped electrode is arranged on the display panel and is arranged at a position overlapping with the second electrode in planar view. The ring-shaped electrode includes a protruding portion overlapping with at least one of the plurality of first electrodes in planar view.
    Type: Application
    Filed: September 19, 2022
    Publication date: January 19, 2023
    Inventors: Akihiko FUJISAWA, Kaoru ITO, Tsutomu HARADA, Takayuki NAKANISHI
  • Publication number: 20220382105
    Abstract: According to one embodiment, a display device includes a display panel including a display area which displays images, a plurality of light sources irradiating light to display an image on the display area and a control unit which sequentially causes the plurality of light source, which correspond to a plurality of areas divided from the display area, to emit light for each of the areas. The control unit repeatedly causes the light source, which corresponds to an area specified from the plurality of areas based on the image, to emit light during one frame period of displaying an image on the display area.
    Type: Application
    Filed: August 12, 2022
    Publication date: December 1, 2022
    Applicant: Japan Display Inc.
    Inventor: Tsutomu HARADA
  • Publication number: 20220375377
    Abstract: A display device includes: a first panel comprising pixels; and a second panel having a plate surface provided substantially parallel to a plate surface of the first panel. The plate surface of each of the first and second panels includes a curved surface. When the curved surface is a convex portion and two pixels controlled to transmit the light through the first panel are located in the convex portion, a distance between centers of two predetermined regions to which a blurring processing is applied corresponding to the two pixels is set smaller than a distance between the two the pixels. When the curved surface is a concave portion and the two pixels controlled to transmit the light through the first panel are located in the concave portion, the distance between the centers of the two predetermined regions is set larger than the distance between the two the pixels.
    Type: Application
    Filed: May 18, 2022
    Publication date: November 24, 2022
    Inventors: Tomoyuki ISHIHARA, Tsutomu HARADA
  • Patent number: 11508292
    Abstract: According to one embodiment, a display device includes a first power supply line, a second power supply line, a reset line, pixels, gate lines, control wiring lines, source lines, a first driver and a second driver. Each of the pixels includes a drive transistor, a light emitting element, a pixel switch, a storage capacitor and a reset switch. The reset switch is connected between the reset line and a gate electrode of the drive transistor, and switched between an ON state and an OFF state by a second control signal provided via a corresponding control wiring line among the control wiring lines.
    Type: Grant
    Filed: August 20, 2021
    Date of Patent: November 22, 2022
    Assignee: JAPAN DISPLAY INC.
    Inventors: Tsutomu Harada, Tadafumi Ozaki, Kazunari Tomizawa
  • Publication number: 20220351675
    Abstract: According to an aspect, a display device includes a pixel including a first sub-pixel configured to emit light having a peak in a spectrum of red, a second sub-pixel configured to emit light having a peak in a spectrum of green, and a third sub-pixel configured to emit light having a peak in a spectrum of blue. The first sub-pixel, the second sub-pixel, and the third sub-pixel are inorganic light-emitting diodes. A light emission intensity of the second sub-pixel is increased at a predetermined ratio with respect to a light emission intensity of the first sub-pixel when the first sub-pixel emits light at a light emission intensity within a low-luminance range equal to or lower than a predetermined level of luminance.
    Type: Application
    Filed: April 22, 2022
    Publication date: November 3, 2022
    Inventors: Kazuhiko SAKO, Kazunari TOMIZAWA, Tsutomu HARADA
  • Publication number: 20220343868
    Abstract: According to one embodiment, a display device includes a display panel including a first sub display area and a second sub display area, and an illumination device, wherein the illumination device includes a first light source opposed to the first sub display area, a second light source opposed to the second sub display area, and a partition positioned between the first and second light sources and the display panel, and the partition includes a first side surface surrounding the first light source, a second side surface surrounding the second light source, and a connector which connects the first side surface and the second side surface, and the connector is formed of curved surfaces, or two or more flat surfaces, or a combination of curved surfaces and flat surfaces.
    Type: Application
    Filed: July 11, 2022
    Publication date: October 27, 2022
    Inventors: Shigenori Aoki, Tatsuya Yata, Tsutomu Harada
  • Publication number: 20220334437
    Abstract: According to one embodiment, a display device includes a plurality of red subpixels, a plurality of green subpixels, and a plurality of blue subpixels, wherein, in a first direction, the red subpixel and the green subpixel, the green subpixel and the blue subpixel, and the blue subpixel and the red subpixel are arranged to be adjacent to each other, and in a second direction, the red subpixel and the blue subpixel, the blue subpixel and the green subpixel, and the green subpixel and the red subpixel are arranged to be adjacent to each other, and in the subpixels, as to subpixel columns adjacent to each other, when an image signal of the same gradation is input with respect to the subpixels of same color, brightness of one subpixel column is higher than that of another subpixel column.
    Type: Application
    Filed: June 22, 2022
    Publication date: October 20, 2022
    Applicant: Japan Display Inc.
    Inventors: Kazunari TOMIZAWA, Tsutomu Harada
  • Publication number: 20220325672
    Abstract: A system for supplying hydrogen gas to an engine is disclosed. The system includes a main line configured to send hydrogen gas produced in a hydrogen gas producer by electrolysis to a supply line; a sub-line configured to send hydrogen gas from a hydrogen absorbing alloy cylinder to the main line, a governor configured to maintain an engine rotation speed within certain range; and a control device. The governor sends a signal corresponding to the engine rotation speed to the control device. A pressure regulating valve is disposed in the sub-line to be downstream with respect to the hydrogen absorbing alloy cylinder to regulate a supply amount of added hydrogen. An opening degree of the valve is adjusted based on a signal from the control device corresponding to the opening degree of the valve for supplying the added hydrogen with an amount according to a load state of the engine.
    Type: Application
    Filed: October 27, 2020
    Publication date: October 13, 2022
    Inventors: Masanori ITO, Yoshihiro JABANA, Tsutomu HARADA
  • Publication number: 20220270558
    Abstract: According to an aspect, a display device includes: a display panel including a display area provided with a plurality of pixels; and a light source configured to emit light to the display panel. Writing periods and lighting periods are alternately provided in one frame period for at least one color. Each writing period is a period in which part of a pixel signal is written to a corresponding one of the pixels. Each lighting period is a period in which light is emitted to the pixel after a corresponding one of the writing periods. A light amount in at least one of the lighting periods is larger than a light amount in other lighting periods.
    Type: Application
    Filed: May 16, 2022
    Publication date: August 25, 2022
    Inventors: Tadafumi OZAKI, Tsutomu HARADA
  • Patent number: 11417286
    Abstract: According to one embodiment, a display device includes a display panel including a first sub display area and a second sub display area, and an illumination device, wherein the illumination device includes a first light source opposed to the first sub display area, a second light source opposed to the second sub display area, and a partition positioned between the first and second light sources and the display panel, and the partition includes a first side surface surrounding the first light source, a second side surface surrounding the second light source, and a connector which connects the first side surface and the second side surface, and the connector is formed of curved surfaces, or two or more flat surfaces, or a combination of curved surfaces and flat surfaces.
    Type: Grant
    Filed: February 17, 2021
    Date of Patent: August 16, 2022
    Assignee: Japan Display Inc.
    Inventors: Shigenori Aoki, Tatsuya Yata, Tsutomu Harada
  • Patent number: 11402701
    Abstract: According to one embodiment, a display device includes a plurality of red subpixels, a plurality of green subpixels, and a plurality of blue subpixels, wherein, in a first direction, the red subpixel and the green subpixel, the green subpixel and the blue subpixel, and the blue subpixel and the red subpixel are arranged to be adjacent to each other, and in a second direction, the red subpixel and the blue subpixel, the blue subpixel and the green subpixel, and the green subpixel and the red subpixel are arranged to be adjacent to each other, and in the subpixels, as to subpixel columns adjacent to each other, when an image signal of the same gradation is input with respect to the subpixels of same color, brightness of one subpixel column is higher than that of another subpixel column.
    Type: Grant
    Filed: June 1, 2021
    Date of Patent: August 2, 2022
    Assignee: Japan Display Inc.
    Inventors: Kazunari Tomizawa, Tsutomu Harada
  • Publication number: 20220221956
    Abstract: Display device is provided and includes display part including first and second substrates, first and second polarizing plates, display area that includes pixel electrodes, a common electrode and display functional layer each of which is arranged between first and second substrates, display image formed by applying display voltage between pixel electrodes and common electrode in display period, input part including third substrate having back surface facing front surface of display part, detection electrodes formed on back surface of third substrate, and conductive layer provided between back surface of third substrate and front surface of display part, wherein conductive layer overlaps third substrate without through detection electrodes outside display area, and part of detection electrodes is uncovered by conductive layer outside display area.
    Type: Application
    Filed: March 28, 2022
    Publication date: July 14, 2022
    Inventors: Hayato KURASAWA, Kohei AZUMI, Koji ISHIZAKI, Hideki KANEKO, Tsutomu HARADA
  • Patent number: 11348541
    Abstract: According to one embodiment, a display device includes a display panel including a first sub display area and a second sub display area, and an illumination device, wherein the illumination device includes a first light source opposed to the first sub display area, a second light source opposed to the second sub display area, and a partition positioned between the first and second light sources and the display panel, and the partition includes a first side surface surrounding the first light source, a second side surface surrounding the second light source, and a connector which connects the first side surface and the second side surface, and the connector is formed of curved surfaces, or two or more flat surfaces, or a combination of curved surfaces and flat surfaces.
    Type: Grant
    Filed: January 9, 2020
    Date of Patent: May 31, 2022
    Assignee: Japan Display Inc.
    Inventors: Shigenori Aoki, Tatsuya Yata, Tsutomu Harada
  • Publication number: 20220108665
    Abstract: A display device includes: a display panel to display a frame image by arranging line images; and a light source. One frame period includes sub-frame periods each including a writing period and a display period. The line images are written in units of a predetermined number of lines during the writing period. The line images that are written at a time in units of the predetermined number of lines are the same image. In two continuous sub-frame periods in the one frame period, when a line image to be written during the writing period in a preceding sub-frame period differs from a line image to be written during the writing period in a subsequent sub-frame period, a start position of the writing period in the preceding sub-frame period and a start position of the writing period in the subsequent sub-frame period are shifted by one line from each other.
    Type: Application
    Filed: December 16, 2021
    Publication date: April 7, 2022
    Inventors: Tadafumi OZAKI, Tsutomu HARADA
  • Patent number: 11294173
    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: Grant
    Filed: November 27, 2018
    Date of Patent: April 5, 2022
    Assignee: Japan Display Inc.
    Inventors: Tsutomu Harada, Shigenori Aoki, Koji Yoshida, Masayuki Mifune, Kazunori Yamaguchi