Patents by Inventor Osamu Itou

Osamu Itou 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: 20170176792
    Abstract: According to one embodiment, a display device includes a color filter formed on an inorganic layer, an inorganic film formed above the color filter, and a semiconductor layer formed above the inorganic film. As seen in plan view, the inorganic film is provided over a first area in which the color filter is overlapped and a second area which surrounds the first area. In the second area, the inorganic film is located outward of the color filter.
    Type: Application
    Filed: December 14, 2016
    Publication date: June 22, 2017
    Applicant: Japan Display Inc.
    Inventors: Daisuke SONODA, Osamu ITOU, Muneharu AKIYOSHI
  • Patent number: 9684211
    Abstract: A liquid crystal display device having a second substrate and a first substrate that is placed so as to face the above-described second substrate with pixel regions aligned in a matrix is provided with: protrusions that are formed on pixel boarders and protrude from the second substrate on the liquid crystal side; first electrodes made of sidewall electrodes formed on sidewalls of protrusions and a lower end side electrode extending from the sidewall electrodes on the bottom side; and second electrodes made of a first linear electrode formed within a pixel region and a second linear electrode that is formed on the second substrate and faces the first linear electrode.
    Type: Grant
    Filed: March 1, 2016
    Date of Patent: June 20, 2017
    Assignee: JAPAN DISPLAY INC
    Inventors: Osamu Itou, Takato Hiratsuka
  • Publication number: 20170139299
    Abstract: A provided is a liquid crystal display device with a high definition screen and less color mixture. On an array substrate, a pixel is formed between the adjacent video signal lines, a color filter is formed within the pixel, a flattening film is formed on the color filter, a lower layer is formed on the flattening film, and an upper layer having a slit is formed on the lower layer with an interlayer insulating film interposed therebetween; and on the array substrate, an opposite substrate is arranged with a liquid crystal layer interposed therebetween. When a distance from the top of the video signal line working as a light shielding film to the bottom of the liquid crystal layer is defined as d and a space between the centers of the video signal lines separating the pixel is defined as w, a relation of d?0.3w is satisfied.
    Type: Application
    Filed: January 31, 2017
    Publication date: May 18, 2017
    Inventors: Kenji NAKAO, Osamu ITOU, Toshimasa ISHIGAKI, Daisuke SONODA, Takato HIRATSUKA
  • Publication number: 20170131592
    Abstract: There is provided a high-definition liquid crystal display device that can prevent flicker due to a reduction in the pixel potential in a low-frequency drive of about 10 Hz to reduce power consumption. The pixel has a TFT formed of Poly-Si as a switching element. In the pixel, a capacitance insulating film is formed on a planar first electrode on which a comb-shaped second electrode is fanned. When the film thickness of the insulating film is d and the dielectric constant at 10 Hz frequency is ?, it is given that ?d?5×10?6 m at 10 Hz frequency. The capacitance insulating film does not have a hysteresis characteristic. The refractive index of the capacitance insulating film with respect to a light of a wavelength of 632.8 nm is 1.7 to 2.0.
    Type: Application
    Filed: January 24, 2017
    Publication date: May 11, 2017
    Inventors: Toshiki KANEKO, Takashi NAKAMURA, Masahiro TADA, Yukio TANAKA, Hiroyuki KIMURA, Osamu ITOU
  • Patent number: 9638966
    Abstract: To prevent dark unevenness at the corner portion of a screen, a provided is a liquid crystal display including a first pixel formed with a pixel electrode at a first angle in a Y-direction, wherein the pixel electrodes of top, bottom, left, and right adjacent pixels to the first pixel are at a second angle in a Y-direction. The absolute value of the first angle is equal to the absolute value of the second angle, and a sign of the first angle is opposite to a sign of the second angle The rotation direction of a liquid crystal when a voltage is applied to the pixel electrode is in the opposite directions between the adjacent pixels. Thus, it is possible to prevent ions included in the liquid crystal from flowing on the peripheral portion of a display region to prevent dark unevenness at the corner portion of the screen.
    Type: Grant
    Filed: July 1, 2015
    Date of Patent: May 2, 2017
    Assignee: Japan Display Inc.
    Inventors: Takenori Hirota, Osamu Itou
  • Patent number: 9625772
    Abstract: In an LCD device, the slope angle of a wall surface of a wall structure (wall-surface slope angle) is varied in accordance with the angle formed between the wall structure and an alignment treatment direction (alignment treatment angle). At places where the alignment treatment angle is small, the wall-surface slope angle is made larger; conversely, at places where the alignment treatment angle is large, the wall-surface slope angle is made smaller.
    Type: Grant
    Filed: November 4, 2014
    Date of Patent: April 18, 2017
    Assignee: Japan Display Inc.
    Inventors: Osamu Itou, Takato Hiratsuka, Toshimasa Ishigaki, Daisuke Sonoda
  • Publication number: 20170090262
    Abstract: According to one embodiment, a liquid crystal display device, includes a first substrate including a scanning signal line, a video signal line, a first electrode, a color filter, a common line in contact with the first electrode along the video signal line, an antireflection layer located on the common line, a transparent layer located on the antireflection layer, and a second electrode, a liquid crystal layer located on the first substrate, and a second substrate located on the liquid crystal layer, the transparent layer having a thickness of 10 nm or more and 40 nm or less.
    Type: Application
    Filed: September 27, 2016
    Publication date: March 30, 2017
    Applicant: Japan Display Inc.
    Inventors: Osamu ITOU, Daisuke SONODA, Masahiro KOSUGE
  • Patent number: 9606389
    Abstract: The present invention provides a liquid crystal display device including: plural pixels disposed in a matrix shape, each pixel having insulating wall-shaped structures at the boundaries of the pixels and a small wall-shaped structure between the wall-shaped structures; wall electrodes, each having wall-shaped electrodes formed on the side faces of the wall-shaped structures, and planar electrodes that are connected to the wall-shaped electrodes and extend in the planar direction; electrodes, each having a TFT-side electrode covering the small wall-shaped structure and a storage capacitor electrode that is connected to the TFT-side electrode and extends in the planar direction of the substrate; and interlayer insulating films formed between the storage capacitor electrodes and the planar electrodes. And the interlayer insulating films of inorganic films are not formed on the upper and side faces and at the base portions of the wall-shaped structures at the boundaries of the pixels.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: March 28, 2017
    Assignee: Japan Display Inc.
    Inventors: Takato Hiratsuka, Osamu Itou, Masanao Yamamoto, Daisuke Sonoda, Toshimasa Ishigaki
  • Patent number: 9594278
    Abstract: A provided is a liquid crystal display device with a high definition screen and less color mixture. On an array substrate, a pixel is formed between the adjacent video signal lines, a color filter is formed within the pixel, a flattening film is formed on the color filter, a lower layer is formed on the flattening film, and an upper layer having a slit is formed on the lower layer with an interlayer insulating film interposed therebetween; and on the array substrate, an opposite substrate is arranged with a liquid crystal layer interposed therebetween. When a distance from the top of the video signal line working as a light shielding film to the bottom of the liquid crystal layer is defined as d and a space between the centers of the video signal lines separating the pixel is defined as w, a relation of d?0.3 w is satisfied.
    Type: Grant
    Filed: July 2, 2015
    Date of Patent: March 14, 2017
    Assignee: Japan Display Inc.
    Inventors: Kenji Nakao, Osamu Itou, Toshimasa Ishigaki, Daisuke Sonoda, Takato Hiratsuka
  • Patent number: 9588366
    Abstract: There is provided a high-definition liquid crystal display device that can prevent flicker due to a reduction in the pixel potential in a low-frequency drive of about 10 Hz to reduce power consumption. The pixel has a TFT formed of Poly-Si as a switching element. In the pixel, a capacitance insulating film is formed on a planar first electrode on which a comb-shaped second electrode is formed. When the film thickness of the insulating film is d and the dielectric constant at 10 Hz frequency is ?, it is given that ?d?5×10?6 m at 10 Hz frequency. The capacitance insulating film does not have a hysteresis characteristic. The refractive index of the capacitance insulating film with respect to a light of a wavelength of 632.8 nm is 1.7 to 2.0.
    Type: Grant
    Filed: July 29, 2015
    Date of Patent: March 7, 2017
    Assignee: Japan Display Inc.
    Inventors: Toshiki Kaneko, Takashi Nakamura, Masahiro Tada, Yukio Tanaka, Hiroyuki Kimura, Osamu Itou
  • Publication number: 20170059952
    Abstract: According to one embodiment, a liquid crystal display device includes a first substrate including a scan signal line, an image signal line, a thin-film transistor, and a color filter including a recessed portion which is recessed in planar view, a second substrate above the first substrate, a liquid crystal layer between the first substrate and the second substrate, and a spacer, wherein the spacer and the scan signal line are provided in the recessed portion in planer view.
    Type: Application
    Filed: August 8, 2016
    Publication date: March 2, 2017
    Applicant: Japan Display Inc.
    Inventors: Osamu ITOU, Yoshiro AOKI
  • Patent number: 9568787
    Abstract: Pixel electrodes and a common electrode are formed on a first panel. A wall is formed on the first panel. The wall includes a large insulating wall that is made of an insulating material and projects toward a second panel, and a wall electrode part that covers a side wall of the large insulating wall and functions as the pixel electrode or the common electrode. The wall includes a side surface on which an alignment film that defines an alignment of liquid crystal molecules of a liquid crystal layer is formed. The side wall of the wall is inclined with respect to a direction perpendicular to the first panel and the second panel. With this configuration, in a liquid crystal display device having the wall electrode, light leakage at the time of displaying a black image can be reduced.
    Type: Grant
    Filed: September 19, 2014
    Date of Patent: February 14, 2017
    Assignee: Japan Display Inc.
    Inventors: Takato Hiratsuka, Osamu Itou, Daisuke Sonoda, Toshimasa Ishigaki
  • Publication number: 20160357078
    Abstract: A liquid crystal display device includes a TFT substrate, a CF substrate, and a liquid crystal interposed between the TFT substrate and the CF substrate, and drives the liquid crystal in a horizontal electric field. The TFT substrate includes a recess, and the CF substrate includes a columnar protrusion. The protrusion of the CF substrate is fitted to the recess of the TFT substrate so as to function as a stopper for preventing a positional gap between the TFT substrate and the CF substrate.
    Type: Application
    Filed: August 16, 2016
    Publication date: December 8, 2016
    Inventors: Yasushi TOMIOKA, Takato HIRATSUKA, Osamu ITOU
  • Patent number: 9488884
    Abstract: In a liquid crystal display device having wall structures, the generation of low-temperature shock bubbles is suppressed. Also, electrodes and the like within substrates are prevented from being damaged during manufacturing. The liquid crystal display device includes a first substrate, a second substrate that is disposed to face the first substrate, a liquid crystal layer that is disposed between the first substrate and the second substrate, wall structures that are formed on the first substrate, pixel electrodes that are disposed on at least side wall of the wall structures, a common electrode that is formed on the first substrate, and a plurality of pixels including the pixel electrodes and the common electrode, in which higher portions are partially disposed on a surface of the second substrate, and the higher portions come into contact with the wall structures to bring the first substrate into contact with the second substrate.
    Type: Grant
    Filed: August 2, 2013
    Date of Patent: November 8, 2016
    Assignee: Japan Display Inc.
    Inventors: Takato Hiratsuka, Osamu Itou, Miharu Otani, Toshimasa Ishigaki, Daisuke Sonoda
  • Publication number: 20160299395
    Abstract: A display device includes a first light shielding part provided between a filter film and a first electrode, and a second light shielding part provided on a second substrate. First and second filter films each have long sides that extend in a first direction in which a video signal line extends, and the first and the second filter films are arranged adjacent to each other in a second direction different from the first direction. The first light shielding part overlaps the video signal line in a plan view. The second light shielding part overlaps a metal electrode in the plan view.
    Type: Application
    Filed: March 31, 2016
    Publication date: October 13, 2016
    Applicant: Japan Display Inc.
    Inventors: Masahiro KOSUGE, Kenji Nakao, Osamu Itou
  • Publication number: 20160291428
    Abstract: In a wall electrode liquid crystal display device, planar distribution of the wall structure and the electrode is optimized to improve a yield. A liquid crystal display device includes a plurality of pixels arranged in a matrix, each of the pixels having an insulator wall structure formed at a border of pixels, a wall electrode formed at a side surface of the wall structure of the border of the pixels, a source electrode which is continuous with the wall electrode and formed of a planar electrode extending in a planar direction, a first common electrode provided between source electrodes at both sides of the pixel to form a retentive capacitance, and a second common electrode provided between wall electrodes on both sides of the pixel. A slit which becomes a border of the wall electrodes of two adjacent pixels is disposed only on a top of the wall structure.
    Type: Application
    Filed: May 18, 2016
    Publication date: October 6, 2016
    Inventors: Osamu ITOU, Takato HIRATSUKA, Masanao YAMAMOTO, Toshimasa ISHIGAKI, Daisuke SONODA
  • Publication number: 20160291377
    Abstract: According to an aspect, a liquid crystal display device includes, in sequence, a thin-film transistor substrate comprising a thin-film transistor, a liquid crystal layer, and a counter substrate. The thin-film transistor substrate includes: a first translucent electrode; a color filter; metal wiring that is provided above the color filter and electrically coupled with the first translucent electrode; a light-absorbing layer provided on the metal wiring; and an optical interference layer provided on the light-absorbing layer. The optical interference layer includes the first translucent electrode.
    Type: Application
    Filed: March 17, 2016
    Publication date: October 6, 2016
    Applicant: Japan Display Inc.
    Inventors: Masahiro KOSUGE, Toshimasa ISHIGAKI, Osamu ITOU
  • Patent number: 9448448
    Abstract: A liquid crystal display device includes a TFT substrate, a CF substrate, and a liquid crystal interposed between the TFT substrate and the CF substrate, and drives the liquid crystal in a horizontal electric field. The TFT substrate includes a recess, and the CF substrate includes a columnar protrusion. The protrusion of the CF substrate is fitted to the recess of the TFT substrate so as to function as a stopper for preventing a positional gap between the TFT substrate and the CF substrate.
    Type: Grant
    Filed: October 7, 2014
    Date of Patent: September 20, 2016
    Assignee: Japan Display Inc.
    Inventors: Yasushi Tomioka, Takato Hiratsuka, Osamu Itou
  • Publication number: 20160178963
    Abstract: A color filter substrate includes an insulating substrate, a first pixel electrode, a second pixel electrode, a third pixel electrode, a first color filter disposed between the first pixel electrode and the insulating substrate, a second color filter disposed between the second pixel electrode and the insulating substrate, and a third color filter disposed between the third pixel electrode and the insulating substrate, wherein the first pixel electrode, the second pixel electrode, and the third pixel electrode are adjacent to each other, the first color filter has a first end, the second color filter has a second end, and the third color filter has a third end, and two of the first end, the second end, and the third end overlap in the first overlap area.
    Type: Application
    Filed: December 10, 2015
    Publication date: June 23, 2016
    Applicant: Japan Display Inc.
    Inventors: Osamu ITOU, Kenji NAKAO, Toshimasa ISHIGAKI, Daisuke SONODA
  • Publication number: 20160178975
    Abstract: A liquid crystal display device having a second substrate and a first substrate that is placed so as to face the above-described second substrate with pixel regions aligned in a matrix is provided with: protrusions that are formed on pixel boarders and protrude from the second substrate on the liquid crystal side; first electrodes made of sidewall electrodes formed on sidewalls of protrusions and a lower end side electrode extending from the sidewall electrodes on the bottom side; and second electrodes made of a first linear electrode formed within a pixel region and a second linear electrode that is formed on the second substrate and faces the first linear electrode.
    Type: Application
    Filed: March 1, 2016
    Publication date: June 23, 2016
    Inventors: Osamu ITOU, Takato HIRATSUKA