Patents by Inventor Takeyuki Tsuruma

Takeyuki Tsuruma 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: 20230335068
    Abstract: Provided is a method for controlling a display device that is driven by using PWM signals, the method comprising: obtaining, by a controller, a type of display contents which are displayed on the display device; and controlling, by the controller, a duty of the PWM signals for driving the display device according to the type of the display contents, wherein the duty of the PWM signals is set to a first value if the type of the display contents is a video, and the duty of the PWM signals is set to a second value larger than the first value if the type of the display contents is a static-image.
    Type: Application
    Filed: June 26, 2023
    Publication date: October 19, 2023
    Inventors: Takeyuki TSURUMA, Teppei ISOBE, Masafumi MATSUI
  • Patent number: 10527891
    Abstract: According to one embodiment, a liquid crystal display device includes a first substrate, a second substrate, and a liquid crystal layer. The first substrate includes a first line, a second line, a switching element, a common electrode, an insulating film disposed on the common electrode, a pixel electrode connected with the switching element and opposed to the common electrode with the insulating film interposed therebetween, and a first alignment film covering the pixel electrode. The second substrate includes a second alignment film. And the pixel electrode includes one main pixel electrode extending in a belt shape in a pixel area defined by the first line and the second line.
    Type: Grant
    Filed: December 29, 2017
    Date of Patent: January 7, 2020
    Assignee: Japan Display Inc.
    Inventors: Seiji Uejima, Hidemasa Yamaguchi, Yoshitaka Ozeki, Takeyuki Tsuruma, Kenta Seki, Toshiaki Fukushima
  • Patent number: 10520779
    Abstract: In order to increase the transmittance around a pixel and to increase the brightness of the screen in an IPS mode liquid crystal display device, a pixel electrode with a slit is formed on a common electrode through an interlayer insulating film. An opening is formed in the common electrode on the outside of the end portion of the pixel electrode as seen in a plane view. Because of the presence of the opening, the electric field lines from the end portion of the pixel electrode reach the layer above the liquid crystal layer and reach further away from the end portion of the pixel electrode, so that it is possible to increase the control ability to the liquid crystal around the pixel. As a result, the pixel transmittance can be increased as a whole and the brightness of the screen can be increased.
    Type: Grant
    Filed: October 5, 2018
    Date of Patent: December 31, 2019
    Assignee: Japan Display Inc.
    Inventors: Takeyuki Tsuruma, Hidemasa Yamaguchi
  • Patent number: 10394369
    Abstract: According to one embodiment, a display device includes a display area with pixels, and a detection electrode which includes first conductive lines overlapping the display area. Each of the pixels includes a first subpixel, a second subpixel adjacent to the first subpixel in a first direction, a third subpixel adjacent to the first subpixel in a second direction, and a fourth subpixel adjacent to the third subpixel in the first direction and to the second subpixel in the second direction. The pixels are arranged in the first direction with a first pitch, and the first conductive lines are arranged in the first direction with a second pitch which falls within a range of 2.2 times the first pitch or more and 3.2 times the first pitch or less.
    Type: Grant
    Filed: October 13, 2016
    Date of Patent: August 27, 2019
    Assignee: Japan Display Inc.
    Inventors: Takeyuki Tsuruma, Masaru Uchiyama, Michiaki Sakamoto, Koji Ishizaki
  • Publication number: 20190041706
    Abstract: In order to increase the transmittance around a pixel and to increase the brightness of the screen in an IPS mode liquid crystal display device, a pixel electrode with a slit is formed on a common electrode through an interlayer insulating film. An opening is formed in the common electrode on the outside of the end portion of the pixel electrode as seen in a plane view. Because of the presence of the opening, the electric field lines from the end portion of the pixel electrode reach the layer above the liquid crystal layer and reach further away from the end portion of the pixel electrode, so that it is possible to increase the control ability to the liquid crystal around the pixel. As a result, the pixel transmittance can be increased as a whole and the brightness of the screen can be increased.
    Type: Application
    Filed: October 5, 2018
    Publication date: February 7, 2019
    Inventors: Takeyuki Tsuruma, Hidemasa Yamaguchi
  • Patent number: 10120245
    Abstract: In order to increase the transmittance around a pixel and to increase the brightness of the screen in an IPS mode liquid crystal display device, a pixel electrode with a slit is formed on a common electrode through an interlayer insulating film. An opening is formed in the common electrode on the outside of the end portion of the pixel electrode as seen in a plane view. Because of the presence of the opening, the electric field lines from the end portion of the pixel electrode reach the layer above the liquid crystal layer and reach further away from the end portion of the pixel electrode, so that it is possible to increase the control ability to the liquid crystal around the pixel. As a result, the pixel transmittance can be increased as a whole and the brightness of the screen can be increased.
    Type: Grant
    Filed: November 11, 2016
    Date of Patent: November 6, 2018
    Assignee: Japan Display Inc.
    Inventors: Takeyuki Tsuruma, Hidemasa Yamaguchi
  • Patent number: 10054829
    Abstract: According to one embodiment, a liquid crystal display device includes a first scanning line, a third scanning line, a second scanning line, a first linear electrode, a second linear electrode and a third linear electrode. The first linear electrode is located between the first scanning line and the second scanning line, and extends in a third direction. The second linear electrode is located between the first scanning line and the second scanning line, and extends in a fourth direction. The third linear electrode is located between the second scanning line and the third scanning line, and comprises a portion extending in the fourth direction. The second linear electrode is electrically connected to the third linear electrode.
    Type: Grant
    Filed: January 2, 2018
    Date of Patent: August 21, 2018
    Assignee: Japan Display Inc.
    Inventors: Takeyuki Tsuruma, Masakatsu Kitani, Yoshihide Ohue
  • Patent number: 9978321
    Abstract: According to one embodiment, a display device includes signal lines, scanning lines, a first pixel, a second pixel and a third pixel. The first pixel including a first subpixel which displays a first color, a second subpixel which displays white, and a third subpixel which displays a second color. The second pixel including a fourth subpixel which displays a third color, a fifth subpixel which displays white, and a sixth subpixel which displays the first color. The third pixel including a seventh subpixel which displays the second color, an eighth subpixel which displays white, and a ninth subpixel which displays the third color.
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: May 22, 2018
    Assignee: Japan Display Inc.
    Inventors: Takeyuki Tsuruma, Akira Sakaigawa, Masaaki Kabe, Kojiro Ikeda
  • Publication number: 20180120654
    Abstract: According to one embodiment, a liquid crystal display device includes a first scanning line, a third scanning line, a second scanning line, a first linear electrode, a second linear electrode and a third linear electrode. The first linear electrode is located between the first scanning line and the second scanning line, and extends in a third direction. The second linear electrode is located between the first scanning line and the second scanning line, and extends in a fourth direction. The third linear electrode is located between the second scanning line and the third scanning line, and comprises a portion extending in the fourth direction. The second linear electrode is electrically connected to the third linear electrode.
    Type: Application
    Filed: January 2, 2018
    Publication date: May 3, 2018
    Applicant: Japan Display Inc.
    Inventors: Takeyuki TSURUMA, Masakatsu KITANI, Yoshihide OHUE
  • Publication number: 20180120653
    Abstract: According to one embodiment, a liquid crystal display device includes a first substrate, a second substrate, and a liquid crystal layer. The first substrate includes a first line, a second line, a switching element, a common electrode, an insulating film disposed on the common electrode, a pixel electrode connected with the switching element and opposed to the common electrode with the insulating film interposed therebetween, and a first alignment film covering the pixel electrode. The second substrate includes a second alignment film. And the pixel electrode includes one main pixel electrode extending in a belt shape in a pixel area defined by the first line and the second line.
    Type: Application
    Filed: December 29, 2017
    Publication date: May 3, 2018
    Applicant: Japan Display Inc.
    Inventors: Seiji Uejima, Hidemasa Yamaguchi, Yoshitaka Ozeki, Takeyuki Tsuruma, Kenta Seki, Toshiaki Fukushima
  • Patent number: 9941412
    Abstract: According to one embodiment, a display device includes a first scanning line, a signal line, a second pixel electrode, a first pixel electrode, a second thin-film transistor, a first line and a second line. The first line is connected to the second pixel electrode, and extends through a region facing the first pixel electrode to the first scanning line side. The first line and a second semiconductor layer of the second thin-film transistor are provided on a first insulating film and are formed of a same material. The second line connects the first line and a fourth electrode of the second thin-film transistor.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: April 10, 2018
    Assignee: Japan Display Inc.
    Inventors: Takeyuki Tsuruma, Yoshihide Ohue, Masakatsu Kitani
  • Patent number: 9897871
    Abstract: According to one embodiment, a liquid crystal display device includes a first scanning line, a third scanning line, a second scanning line, a first linear electrode, a second linear electrode and a third linear electrode. The first linear electrode is located between the first scanning line and the second scanning line, and extends in a third direction. The second linear electrode is located between the first scanning line and the second scanning line, and extends in a fourth direction. The third linear electrode is located between the second scanning line and the third scanning line, and comprises a portion extending in the fourth direction. The second linear electrode is electrically connected to the third linear electrode.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: February 20, 2018
    Assignee: Japan Display Inc.
    Inventors: Takeyuki Tsuruma, Masakatsu Kitani, Yoshihide Ohue
  • Patent number: 9891479
    Abstract: According to one embodiment, a liquid crystal display device includes a first substrate, a second substrate, and a liquid crystal layer. The first substrate includes a first line, a second line, a switching element, a common electrode, an insulating film disposed on the common electrode, a pixel electrode connected with the switching element and opposed to the common electrode with the insulating film interposed therebetween, and a first alignment film covering the pixel electrode. The second substrate includes a second alignment film. And the pixel electrode includes one main pixel electrode extending in a belt shape in a pixel area defined by the first line and the second line.
    Type: Grant
    Filed: January 22, 2015
    Date of Patent: February 13, 2018
    Assignee: Japan Display Inc.
    Inventors: Seiji Uejima, Hidemasa Yamaguchi, Yoshitaka Ozeki, Takeyuki Tsuruma, Kenta Seki, Toshiaki Fukushima
  • Patent number: 9804448
    Abstract: An IPS LCD that not only increases the screen luminance but also prevents the occurrence of image blurs by reducing the area of disclination and preventing the liquid crystal molecules from rising in a direction normal to the TFT substrate. A pixel electrode is disposed in the pixel surrounded by two gate lines and two data lines. A planar common electrode is located below the pixel electrode with an inter-layer insulating film provided therebetween. The pixel electrode includes slits each being open at the edge on one side and has the shape of a comb. Liquid crystals with negative dielectric anisotropy are used as liquid crystal. The above structure increases the transmissive area of the pixel up to the open edges of the slits and also prevents the liquid crystal molecules from rising in a direction normal to the TFT substrate, thereby preventing the occurrence of blurs.
    Type: Grant
    Filed: January 14, 2015
    Date of Patent: October 31, 2017
    Assignee: Japan Display Inc.
    Inventors: Takeyuki Tsuruma, Hidemasa Yamaguchi
  • Publication number: 20170285379
    Abstract: According to one embodiment, a display device includes a first scanning line, a signal line, a second pixel electrode, a first pixel electrode, a second thin-film transistor, a first line and a second line. The first line is connected to the second pixel electrode, and extends through a region facing the first pixel electrode to the first scanning line side. The first line and a second semiconductor layer of the second thin-film transistor are provided on a first insulating film and are formed of a same material. The second line connects the first line and a fourth electrode of the second thin-film transistor.
    Type: Application
    Filed: March 31, 2017
    Publication date: October 5, 2017
    Applicant: Japan Display Inc.
    Inventors: Takeyuki TSURUMA, Yoshihide OHUE, Masakatsu KITANI
  • Publication number: 20170285421
    Abstract: According to one embodiment, a liquid crystal display device includes a first scanning line, a third scanning line, a second scanning line, a first linear electrode, a second linear electrode and a third linear electrode. The first linear electrode is located between the first scanning line and the second scanning line, and extends in a third direction. The second linear electrode is located between the first scanning line and the second scanning line, and extends in a fourth direction. The third linear electrode is located between the second scanning line and the third scanning line, and comprises a portion extending in the fourth direction. The second linear electrode is electrically connected to the third linear electrode.
    Type: Application
    Filed: March 31, 2017
    Publication date: October 5, 2017
    Applicant: Japan Display Inc.
    Inventors: Takeyuki TSURUMA, Masakatsu Kitani, Yoshihide Ohue
  • Publication number: 20170177147
    Abstract: According to one embodiment, a display device comprises pixel electrodes, a drive electrode, a detection electrode, and a detection module. The pixel electrodes are provided for respective pixels arrayed in a display area. The drive electrode forms an electric field for image display with the pixel electrodes. The detection electrode is opposed to the drive electrode. And The detection module detects an object in proximity to the display area based on a signal obtained from the detection electrode. In the display device, the detection electrode includes conductive lines extending parallel to each other, and the conductive lines are arranged at randomized pitch.
    Type: Application
    Filed: December 13, 2016
    Publication date: June 22, 2017
    Applicant: JAPAN DISPLAY INC.
    Inventors: MICHIAKI SAKAMOTO, KOJI ISHIZAKI, TAKEYUKI TSURUMA
  • Publication number: 20170123282
    Abstract: According to one embodiment, a liquid crystal display device includes a first substrate including a first electrode, and a second electrode, a second substrate, and a liquid crystal layer, the second electrode includes an edge, the edge includes a first portion, a second portion, and a middle part which is located between the first portion and the second portion and is bent, and liquid crystal molecules form a region, between the first portion and the second portion, in which the liquid crystal molecules are rotated in a same direction by an electric field produced between the first electrode and the second electrode.
    Type: Application
    Filed: October 28, 2016
    Publication date: May 4, 2017
    Applicant: Japan Display Inc.
    Inventor: Takeyuki TSURUMA
  • Publication number: 20170102817
    Abstract: According to one embodiment, a display device includes a display area with pixels, and a detection electrode which includes first conductive lines overlapping the display area. Each of the pixels includes a first subpixel, a second subpixel adjacent to the first subpixel in a first direction, a third subpixel adjacent to the first subpixel in a second direction, and a fourth subpixel adjacent to the third subpixel in the first direction and to the second subpixel in the second direction. The pixels are arranged in the first direction with a first pitch, and the first conductive lines are arranged in the first direction with a second pitch which falls within a range of 2.2 times the first pitch or more and 3.2 times the first pitch or less.
    Type: Application
    Filed: October 13, 2016
    Publication date: April 13, 2017
    Applicant: Japan Display Inc.
    Inventors: Takeyuki TSURUMA, Masaru UCHIYAMA, Michiaki SAKAMOTO, Koji ISHIZAKI
  • Publication number: 20170059950
    Abstract: In order to increase the transmittance around a pixel and to increase the brightness of the screen in an IPS mode liquid crystal display device, a pixel electrode with a slit is formed on a common electrode through an interlayer insulating film. An opening is formed in the common electrode on the outside of the end portion of the pixel electrode as seen in a plane view. Because of the presence of the opening, the electric field lines from the end portion of the pixel electrode reach the layer above the liquid crystal layer and reach further away from the end portion of the pixel electrode, so that it is possible to increase the control ability to the liquid crystal around the pixel. As a result, the pixel transmittance can be increased as a whole and the brightness of the screen can be increased.
    Type: Application
    Filed: November 11, 2016
    Publication date: March 2, 2017
    Inventors: Takeyuki TSURUMA, Hidemasa Yamaguchi