Patents by Inventor Kazuyoshi Nagayama

Kazuyoshi Nagayama 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).

  • Patent number: 10565926
    Abstract: An OLED pixel circuit includes a charging control module (1), a resetting control module (2), and a driving transistor (3). The charging control module (1) is connected to a data signal line and the resetting control module (2). The resetting control module (2) is connected to the driving transistor (3) to reset and compensate the driving transistor (3) to set a control terminal of the driving transistor (3) at a first potential value. The driving transistor (3) is configured to generate a driving current being based on a difference between a potential of a source of the driving transistor and the first potential value, irrespective of a voltage signal at the source of the driving transistor and a threshold voltage of the driving transistor (3).
    Type: Grant
    Filed: August 14, 2015
    Date of Patent: February 18, 2020
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Kazuyoshi Nagayama, Song Song
  • Publication number: 20190137773
    Abstract: There is provided a display device, including a first display panel and a second display panel, the first display panel is flexibly connected with the second display panel, a light-exiting surface of the first display panel may be arranged to be directly adjacent to and face the first surface of the second display panel, the second pixel panel forms light-blocking regions and light-transmitting regions; the first display panel forms a left image for a left eye of a viewer and a right image for a right eye of the viewer, so that the left image is only seen by the left eye and the right image is only seen by the right eye through the light-blocking regions and the light-transmitting regions, the second display panel is capable of being folded to the first display panel along a second direction opposite to the first direction to perform a double-sided display.
    Type: Application
    Filed: December 28, 2018
    Publication date: May 9, 2019
    Inventors: Song SONG, Kazuyoshi NAGAYAMA
  • Patent number: 10262602
    Abstract: An array substrate and a display device are disclosed. The array substrate (01) comprises a gate electrode driving circuit (10), the gate electrode driving circuit (10) includes at least two stages of shift register units (SR1-SRn), and each stage of the shift register units (SR1-SRn) is connected with a row of gate lines (Gate1-Gaten). The shift register units (SR1-SRn) include driving modules (D1-Dn) and logical modules (L1-Ln); the driving modules (D1-Dn) include a portion located in a display region (100) of the array substrate. The array substrate can solve a problem that a larger size of a driving TFT in a gate driver on array (GOA) circuit is not conducive to a narrow frame design trend of a display panel.
    Type: Grant
    Filed: June 2, 2015
    Date of Patent: April 16, 2019
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Kazuyoshi Nagayama, Song Song
  • Patent number: 10241358
    Abstract: A liquid crystal grating and a manufacturing method and a driving method therefor, and a spliced screen including a liquid crystal grating are disclosed. The liquid crystal grating includes: a first substrate and a second substrate arranged opposite to the first substrate; and liquid crystal molecules filled between the first substrate and the second substrate. The first substrate, the second substrate and the liquid crystal molecules are provided to define at least one grating unit. Each of the grating units includes: a display region; a frame region surrounding the display region; a first frame electrode located on the first substrate and arranged corresponding to the frame region; and a second frame electrode located on the second substrate and arranged corresponding to the frame region.
    Type: Grant
    Filed: April 28, 2015
    Date of Patent: March 26, 2019
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Kazuyoshi Nagayama, Song Song
  • Patent number: 10216470
    Abstract: A display screen and a display device are provided. The display device includes: a first display screen; a display screen group arranged on a back surface of the first display screen, the display screen group including at least one second display screen, and a display surface of the second display screen facing the first display screen; and a rotating shaft, the rotating shaft connecting a first side edge of each of the second display screens in the display screen group with a first side edge of the first display screen and being perpendicular to the first display screen and the second display screen. The display device has characteristics of adjustable display screen size and strong flexibility in use.
    Type: Grant
    Filed: April 8, 2016
    Date of Patent: February 26, 2019
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Song Song, Kazuyoshi Nagayama
  • Patent number: 10210805
    Abstract: The present disclosure provides an OLED pixel circuit, a display device and a control method. The OLED pixel circuit includes: an OLED; a driving transistor; a first switching unit; a second switching unit; a compensation circuit connected to the gate electrode of the driving transistor and configured to maintain a voltage of the gate electrode of the driving transistor during a light-emitting period, so as to enable a current flowing through the OLED to be irrelevant to a threshold voltage Vth of the driving transistor; and a reference signal generation module configured to generate, based on a current threshold voltage of the driving transistor, a reference signal to be used by the compensation circuit, wherein a voltage of the reference signal and the threshold voltage meet at least one of validation conditions capable of validating the compensation circuit.
    Type: Grant
    Filed: October 19, 2015
    Date of Patent: February 19, 2019
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Kazuyoshi Nagayama, Song Song
  • Patent number: 10203725
    Abstract: The present disclosure provides a double display device and a wearable apparatus including the double display device, the double display device including: a first display module and a second display module arranged in parallel and connected slidably with each other, the first display module including a first display panel, the second display module including a second display panel; and a common driving component configured to provide a first driving signal to the first display panel and provide a second driving signal to the second display panel.
    Type: Grant
    Filed: September 28, 2015
    Date of Patent: February 12, 2019
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Song Song, Kazuyoshi Nagayama
  • Patent number: 10198028
    Abstract: A display panel has a displaying side and a back side opposite to the displaying side. The display panel comprises: a rectangular display region for displaying an image, the rectangular display region having four sides and four corners formed by adjacent sides respectively; and an outer region surrounding the rectangular display region, the outer region being in a shape of a rectangular frame, and the outer region having four side portions corresponding to the four sides of the rectangular display region and four corner portions each connecting two adjacent side portions respectively, the outer region being provided therein with a closed frame-shaped enclosing structure extending along the entire outer region. Each corner portion is folded along three folding lines provided at the corner portion.
    Type: Grant
    Filed: April 29, 2015
    Date of Patent: February 5, 2019
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Kazuyoshi Nagayama, Song Song
  • Patent number: 10147394
    Abstract: The present disclosure provides a GOA (gate driver on array) circuit for a display screen. The GOA circuit includes at least one GOA group, including a plurality of GOA units connected in series, and a switch control unit configured to transmit control signals. In each of the at least one GOA group, a first-stage GOA unit is connected to a frame-start signal. At least one edge GOA unit is connected to a control signal through the switch control unit. The edge GOA unit being any one of the plurality of GOA units except for the first-stage GOA unit and a last-stage GOA unit.
    Type: Grant
    Filed: September 18, 2015
    Date of Patent: December 4, 2018
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Song Song, Kazuyoshi Nagayama
  • Patent number: 10147397
    Abstract: A flexible display panel and a driving method thereof, and a display device are provided. The flexible display panel includes a pixel region and a gate driving circuit region located outside the pixel region. The flexible display panel further includes a curvature adjusting unit located on two sides of the pixel region, the curvature adjusting unit includes a plurality of isosceles trapezoid units which are sequentially connected with each other through lower surfaces thereof, each isosceles trapezoid unit includes an upper surface, the lower surface, and a third waist surface and a fourth waist surface oppositely arranged between the upper surface and the lower surface, and a length of the upper surface between the third waist surface and the fourth waist surface is less than a length of the lower surface between the third waist surface and the fourth waist surface.
    Type: Grant
    Filed: June 12, 2016
    Date of Patent: December 4, 2018
    Assignee: BOE Technology Group Co., Ltd.
    Inventors: Chunfang Zhang, Song Song, Kazuyoshi Nagayama
  • Patent number: 10140962
    Abstract: The present invention discloses a display unit, a display panel and a driving method thereof, wherein the display unit comprises a full color display subunit capable of displaying full color, and at least one black and white display subunit capable of displaying black and white, when the display unit operates in a first display mode, the full color display subunit and all the black and white display subunit(s) in the display unit display one pixel together; and when the display unit operates in a second display mode, the full color display subunit in the display unit displays one color pixel, and each black and white display subunit in the display unit displays one black/white pixel independently. According to the present invention, pixel display information at the boundaries can be increased, that is, display resolution of the display panel is improved, thereby improving display quality of the display panel.
    Type: Grant
    Filed: January 7, 2016
    Date of Patent: November 27, 2018
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Kazuyoshi Nagayama, Song Song
  • Patent number: 10140947
    Abstract: Provided are a flexible display screen having an extending mode and a retracting mode, a display device comprising the flexible display screen and a display method applicable to the flexible display screen, wherein in the extending mode, the entire flexible display screen can be used for displaying, and in the retracting mode, at least a portion of the flexible display screen is curled and an uncurled portion thereof can be used for displaying. According to the flexible display screen, the display device and the display method, a display region of the flexible display screen can be extended in the extending mode so as to enhance visual experience of the user, and at least a portion of the flexible display screen can be curled and retracted in the retracting mode so as to improve the portability. Meanwhile, a partitioned control can be performed to the displaying on the flexible display screen so as to reduce power consumption of the flexible display screen.
    Type: Grant
    Filed: January 29, 2016
    Date of Patent: November 27, 2018
    Assignee: BOE Technology Group Co., Ltd.
    Inventors: Song Song, Kazuyoshi Nagayama
  • Patent number: 10056039
    Abstract: Embodiments of the invention provide an array substrate and a display device, the array substrate comprises a plurality of pixel units arranged in an array and a plurality of shifting register units, each shifting register unit corresponding to a row of pixel units.
    Type: Grant
    Filed: May 11, 2015
    Date of Patent: August 21, 2018
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Kazuyoshi Nagayama, Song Song
  • Publication number: 20180233083
    Abstract: An OLED pixel circuit includes a charging control module (1), a resetting control module (2), and a driving transistor (3). The charging control module (1) is connected to a data signal line and the resetting control module (2). The resetting control module (2) is connected to the driving transistor (3) to reset and compensate the driving transistor (3) to set a control terminal of the driving transistor (3) at a first potential value. The driving transistor (3) is configured to generate a driving current being based on a difference between a potential of a source of the driving transistor and the first potential value, irrespective of a voltage signal at the source of the driving transistor and a threshold voltage of the driving transistor (3).
    Type: Application
    Filed: August 14, 2015
    Publication date: August 16, 2018
    Applicants: BOE TECHNOLOGY GROUP CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Kazuyoshi Nagayama, Song Song
  • Patent number: 10042206
    Abstract: The present disclosure provides a display substrate, a display panel and a display device. The display substrate includes a first base substrate and a filter layer arranged on the first base substrate. The filter layer includes a red-light emission unit, a green-light emission unit and a blue-light transmission unit. The red-light emission unit includes a red quantum dot material capable of emitting red light when it is irradiated by blue light, the green-light emission unit includes a green quantum dot material capable of emitting green light when it is irradiated by the blue light, and the blue-light transmission unit is not covered with a quantum dot material and the blue light is transmitted through the blue-light transmission unit.
    Type: Grant
    Filed: August 12, 2015
    Date of Patent: August 7, 2018
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Kazuyoshi Nagayama, Song Song
  • Publication number: 20180203277
    Abstract: A liquid crystal grating and a manufacturing method and a driving method therefor, and a spliced screen including a liquid crystal grating are disclosed. The liquid crystal grating includes: a first substrate and a second substrate arranged opposite to the first substrate; and liquid crystal molecules filled between the first substrate and the second substrate. The first substrate, the second substrate and the liquid crystal molecules are provided to define at least one grating unit. Each of the grating units includes: a display region; a frame region surrounding the display region; a first frame electrode located on the first substrate and arranged corresponding to the frame region; and a second frame electrode located on the second substrate and arranged corresponding to the frame region.
    Type: Application
    Filed: April 28, 2015
    Publication date: July 19, 2018
    Inventors: Kazuyoshi Nagayama, Song Song
  • Publication number: 20180197462
    Abstract: The present disclosure provides an OLED pixel circuit, a display device and a control method. The OLED pixel circuit includes: an OLED; a driving transistor; a first switching unit; a second switching unit; a compensation circuit connected to the gate electrode of the driving transistor and configured to maintain a voltage of the gate electrode of the driving transistor during a light-emitting period, so as to enable a current flowing through the OLED to be irrelevant to a threshold voltage Vth of the driving transistor; and a reference signal generation module configured to generate, based on a current threshold voltage of the driving transistor, a reference signal to be used by the compensation circuit, wherein a voltage of the reference signal and the threshold voltage meet at least one of validation conditions capable of validating the compensation circuit.
    Type: Application
    Filed: October 19, 2015
    Publication date: July 12, 2018
    Applicant: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Kazuyoshi NAGAYAMA, Song SONG
  • Patent number: 9959827
    Abstract: A black matrix of the display panel comprises N columns of first sub-regions and M columns of second sub-regions, the pixel electrodes comprise N columns of first pixel electrodes in one-to-one correspondence with N columns of first sub-regions and M columns of second pixel electrodes in one-to-one correspondence with M columns of second sub-regions. A width of the M columns of second sub-regions and a width of the M columns of second pixel electrodes along the row direction of the black matrix are increased only by reducing a width of the N columns of first sub-regions along the row direction of the black matrix, such that some signal lines in the divided gate driver may be placed at the M columns of second sub-regions to enable the display panel not having frames at the left and the right, without substantially not changing the aperture ratio of the display panel.
    Type: Grant
    Filed: October 13, 2015
    Date of Patent: May 1, 2018
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Song Song, Kazuyoshi Nagayama
  • Publication number: 20180114470
    Abstract: A display panel has a displaying side and a back side opposite to the displaying side. The display panel comprises: a rectangular display region for displaying an image, the rectangular display region having four sides and four corners formed by adjacent sides respectively; and an outer region surrounding the rectangular display region, the outer region being in a shape of a rectangular frame, and the outer region having four side portions corresponding to the four sides of the rectangular display region and four corner portions each connecting two adjacent side portions respectively, the outer region being provided therein with a closed frame-shaped enclosing structure extending along the entire outer region. Each corner portion is folded along three folding lines provided at the corner portion.
    Type: Application
    Filed: April 29, 2015
    Publication date: April 26, 2018
    Inventors: Kazuyoshi Nagayama, Song Song
  • Patent number: 9947739
    Abstract: An array substrate and a display device are provided. The array substrate includes: a gate driving circuit, no pixel electrode layer being provided on a position of the array substrate corresponding to the gate driving circuit, the array substrate being made of a flexible material, wherein, the gate driving circuit is disposed on a position of a central axis of the array substrate and extends along a direction of the central axis; the gate driving circuit is configured for providing a driving signal to a gate line of the array substrate.
    Type: Grant
    Filed: December 12, 2014
    Date of Patent: April 17, 2018
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Song Song, Kazuyoshi Nagayama, Shiming Shi