Patents by Inventor Kazutaka Hanaoka

Kazutaka Hanaoka 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: 20230024383
    Abstract: Provided is a liquid crystal display device capable of switching between a transparent state and a scattering state, reducing or preventing a decrease in transmittance in the transparent state, and reducing or preventing a decrease in luminance in the panel central portion in the scattering state. The liquid crystal display device includes, sequentially from its viewing surface side toward its back surface side: a first liquid crystal panel; a light source; and a second liquid crystal panel, the first liquid crystal panel including a polymer dispersed liquid crystal containing a polymer network and liquid crystal components, the light source being configured to irradiate a back surface side main surface of the first liquid crystal panel with light from an oblique direction.
    Type: Application
    Filed: June 29, 2022
    Publication date: January 26, 2023
    Inventors: Koji MURATA, Yasuhiro HASEBA, Kazutaka HANAOKA, Kimiaki NAKAMURA, Mariko HONDA, Atsuko KANASHIMA, Tadashi HASEGAWA, Shinji SHIMADA
  • Publication number: 20230004031
    Abstract: The display device includes a liquid crystal panel including a polymer dispersed liquid crystal (PDLC) layer and a light source, the PDLC layer containing a polymer network and liquid crystal components dispersed in the polymer network, the light source being apart from the liquid crystal panel with an air layer, and configured to emit light toward the liquid crystal panel from an oblique direction, the end portion and the central portion of the PDLC layer each having, in the scattering state, an angle dependence which changes a transmittance of light to be emitted from a front surface based on an angle at which light is incident on a back surface of the PDLC layer, with the angle dependence of the end portion being different from the angle dependence of the central portion, the light source irradiating the end portion and the central portion with light at different angles.
    Type: Application
    Filed: June 7, 2022
    Publication date: January 5, 2023
    Inventors: Koji MURATA, Kazutaka HANAOKA, Kimiaki NAKAMURA, Atsuko KANASHIMA, Mariko HONDA, Shinji SHIMADA
  • Publication number: 20220334438
    Abstract: The liquid crystal display device includes a liquid crystal panel, the liquid crystal panel including sub-pixels and including an active matrix substrate and a counter substrate, the active matrix substrate including a gate line, a first electrode, and a second electrode, the counter substrate including a third electrode, each of the sub-pixels being provided with an optical opening, the third electrode including a linear electrode extending along the gate line, a distance between the linear electrode and the optical opening being less than D/4 and a width of the linear electrode being D/4 or less, wherein a distance between two optical openings adjacent in the direction perpendicular to the extending direction of the gate line is defined as D.
    Type: Application
    Filed: April 7, 2022
    Publication date: October 20, 2022
    Inventors: Koji Murata, Kosuke Nagata, Kazutoshi Kida, Kazutaka Hanaoka, Shinji Shimada, Yasuhiro Haseba
  • Patent number: 11454838
    Abstract: Provided is a liquid crystal display device including: a liquid crystal panel; and a control circuit, the liquid crystal panel sequentially including an active matrix substrate, a first alignment film, a liquid crystal layer, a second alignment film, and a counter substrate, the active matrix substrate sequentially including a first substrate, a first electrode, a first insulating layer, and a second electrode including a linear electrode portion, the counter substrate including a second substrate and a third electrode, the third electrode extending in a longitudinal direction of the sub-pixel at a right or left end of the sub-pixel, a ratio of a width of the third electrode to a width of the first electrode in a widthwise direction being 0.14 or greater and 0.25 or smaller, the control circuit being configured to switch between application of an alternating voltage and application of a constant voltage to the third electrode.
    Type: Grant
    Filed: December 17, 2021
    Date of Patent: September 27, 2022
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Koji Murata, Kazutaka Hanaoka, Shinji Shimada, Kiyoshi Minoura
  • Publication number: 20220236598
    Abstract: Provided is a polymer dispersed liquid crystal display device including: a pair of substrates including an electrode on at least one substrate; and a composite layer disposed between the pair of substrates. The composite layer includes a liquid crystal component and a polymer network constituted by a cured product of a photopolymerizable liquid crystal compound, and is in a transparent state when no voltage is applied and in a scattering state when a voltage is applied, and the polymer network has a helical structure with a number of turns of from one to less than eight in the composite layer.
    Type: Application
    Filed: January 19, 2022
    Publication date: July 28, 2022
    Inventors: Koji MURATA, Kimiaki NAKAMURA, Mariko HONDA, Tadashi HASEGAWA, Kazutaka HANAOKA, Yasuhiro HASEBA, Shinji SHIMADA, Atsuko KANASHIMA
  • Publication number: 20220197067
    Abstract: Provided is a liquid crystal display device including: a liquid crystal panel; and a control circuit, the liquid crystal panel sequentially including an active matrix substrate, a first alignment film, a liquid crystal layer, a second alignment film, and a counter substrate, the active matrix substrate sequentially including a first substrate, a first electrode, a first insulating layer, and a second electrode including a linear electrode portion, the counter substrate including a second substrate and a third electrode, the third electrode extending in a longitudinal direction of the sub-pixel at a right or left end of the sub-pixel, a ratio of a width of the third electrode to a width of the first electrode in a widthwise direction being 0.14 or greater and 0.25 or smaller, the control circuit being configured to switch between application of an alternating voltage and application of a constant voltage to the third electrode.
    Type: Application
    Filed: December 17, 2021
    Publication date: June 23, 2022
    Inventors: KOJI MURATA, KAZUTAKA HANAOKA, SHINJI SHIMADA, KIYOSHI MINOURA
  • Patent number: 10930226
    Abstract: A liquid crystal display device is manufactured at a low cost. In the liquid crystal display device, three sub-pixel electrodes are connected by inter-electrode connection portions to form one pixel electrode. One TFT is connected to the pixel electrode. A screen of a liquid crystal display panel is divided into n (n?2) of areas. Gate signal lines G of each divided area are scanned simultaneously one line at a time in each divided area. A backlight device emits light after completion of the scanning of each divided area.
    Type: Grant
    Filed: April 17, 2018
    Date of Patent: February 23, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Hidefumi Yoshida, Kazutaka Hanaoka, Takahiro Sasaki, Kimiaki Nakamura
  • Patent number: 10796650
    Abstract: In a liquid crystal display device (100), each pixel row group is selected by a common scan signal voltage, each pixel row group including N pixel rows which adjoin one another in a column direction. Where two pixel rows which adjoin each other in a column direction and which are included in different pixel row groups are a first pixel row and a second pixel row, the first pixel row includes a pixel which has a pixel electrode (16) capacitively coupled with a gate bus line (12) which is associated with the second pixel row. When the first pixel row is included in the qth group, the second pixel row is included in the (q+1)th group. A scan signal voltage supplied to gate bus lines which are associated with the (q+1)th group switches from low to high before a scan signal voltage supplied to gate bus lines which are associated with the qth group switches from high to low.
    Type: Grant
    Filed: March 14, 2017
    Date of Patent: October 6, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Iori Aoyama, Yuichi Kita, Takahiro Sasaki, Hidekazu Miyata, Kazutaka Hanaoka
  • Patent number: 10739645
    Abstract: A liquid crystal display apparatus includes a liquid crystal display panel including a first substrate, a second substrate, and a liquid crystal layer and a plurality of pixels. The first substrate includes a first electrode provided in each of the pixels and a first horizontal alignment film that determines a pretilt orientation of a liquid crystal molecule. The second substrate includes a second electrode provided to face the first electrode and a second horizontal alignment film that determines the pretilt orientation of the liquid crystal molecule. Each of the first and second horizontal alignment films is a photoalignment film. At least one of the first substrate and the second substrate includes an anchoring structure in each of the pixels.
    Type: Grant
    Filed: March 28, 2017
    Date of Patent: August 11, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Takahiro Sasaki, Iori Aoyama, Yuichi Kita, Kazutaka Hanaoka
  • Patent number: 10741135
    Abstract: A liquid crystal display device includes sub-pixel electrodes respectively provided to three sub-pixels, and an interelectrode connection portion that connects sub-pixel electrodes adjacent to each other among the sub-pixel electrodes. The interelectrode connection portion is provided in a position where boundaries of liquid crystal alignment directions of sub-pixels adjacent to each other are connected.
    Type: Grant
    Filed: March 19, 2019
    Date of Patent: August 11, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Takahiro Sasaki, Hidefumi Yoshida, Kazutaka Hanaoka, Kimiaki Nakamura
  • Publication number: 20200201091
    Abstract: A liquid crystal display panel including a first substrate, a liquid crystal layer, and a second substrate, the first substrate including in the following order to a liquid crystal layer side: a first electrode, an insulating layer, and a second electrode provided with an aperture, the liquid crystal layer containing liquid crystal molecules homogeneously aligned in a no-voltage-applied state, the aperture having an outline including a first outline portion and a second outline portion which are at different directions to each other in each of pixels, the liquid crystal display panel further including a rib protruding to the liquid crystal layer side and disposed between the first outline portion and the second outline portion on one or both of a liquid crystal layer-side surface of the first substrate and a liquid crystal layer-side surface of the second substrate.
    Type: Application
    Filed: May 14, 2018
    Publication date: June 25, 2020
    Inventors: KIMIAKI NAKAMURA, TAKASHI KATAYAMA, TAKAHIRO SASAKI, SHINPEI HIGASHIDA, KAZUTAKA HANAOKA, HIDEFUMI YOSHIDA
  • Publication number: 20200160799
    Abstract: A liquid crystal display device is manufactured at a low cost. In the liquid crystal display device, three sub-pixel electrodes are connected by inter-electrode connection portions to form one pixel electrode. One TFT is connected to the pixel electrode. A screen of a liquid crystal display panel is divided into n (n?2) of areas. Gate signal lines G of each divided area are scanned simultaneously one line at a time in each divided area. A backlight device emits light after completion of the scanning of each divided area.
    Type: Application
    Filed: April 17, 2018
    Publication date: May 21, 2020
    Inventors: HIDEFUMI YOSHIDA, KAZUTAKA HANAOKA, TAKAHIRO SASAKI, KIMIAKI NAKAMURA
  • Publication number: 20190295482
    Abstract: A liquid crystal display device includes sub-pixel electrodes respectively provided to three sub-pixels, and an interelectrode connection portion that connects sub-pixel electrodes adjacent to each other among the sub-pixel electrodes. The interelectrode connection portion is provided in a position where boundaries of liquid crystal alignment directions of sub-pixels adjacent to each other are connected.
    Type: Application
    Filed: March 19, 2019
    Publication date: September 26, 2019
    Inventors: TAKAHIRO SASAKI, HIDEFUMI YOSHIDA, KAZUTAKA HANAOKA, KIMIAKI NAKAMURA
  • Patent number: 10395606
    Abstract: A liquid crystal display device performs displaying by field sequential driving. The liquid crystal display device includes a plurality of scanning lines; and a plurality of signal lines including a plurality of pairs of signal lines, each pair of signal line being connected to one pixel column. Under field sequential driving, within one field period of emitting any of a plurality of color rays, there is an overlap between: a first period in which a first scanning line group included among the plurality of scanning lines are scanned and one of the pair of signal lines is used to perform signal writes; and a second period in which a second scanning line group included among the plurality of scanning lines are scanned, and another one of the pair of signal lines is used to perform signal writes.
    Type: Grant
    Filed: April 18, 2016
    Date of Patent: August 27, 2019
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Yuichi Kita, Takahiro Sasaki, Iori Aoyama, Kazutaka Hanaoka
  • Publication number: 20190187522
    Abstract: The liquid crystal display device including: a first substrate; a liquid crystal layer; and a second substrate, the first substrate including a first electrode, and a second electrode, the liquid crystal molecules being aligned in a direction parallel to the first substrate with no voltage applied, the second electrode being provided with openings, the openings each having a long shape with two or more wide portions and one or more narrow portions, the two or more wide portions and the one or more narrow portions in each of the openings alternating with each other in a lengthwise direction of the opening, each of the wide portions of one of adjacent two openings being adjacent to one of the narrow portions of the other of the adjacent two openings, each of the narrow portions of the one opening being adjacent to one of the wide portions of the other opening.
    Type: Application
    Filed: December 18, 2018
    Publication date: June 20, 2019
    Inventors: TAKASHI KATAYAMA, SHINPEI HIGASHIDA, TAKAHIRO SASAKI, KAZUTAKA HANAOKA, KIMIAKI NAKAMURA, HIDEFUMI YOSHIDA, SHINJI SHIMADA
  • Patent number: 10311804
    Abstract: In particular case second vertical scanning period includes a write period in which a first potential difference V1 is to be given to an upper electrode and a lower electrode. In another particular case, the second vertical scanning period includes a write period in which a second potential difference V2 being greater than the first potential difference V1 is given to the upper electrode and the lower electrode. In the former write period, substantially the same potential as that of a counter electrode is given to the upper electrode, and a different potential from that of the counter electrode is given to the lower electrode. In the latter write period, substantially the same potential as that of the counter electrode is given to the lower electrode, and a different potential from that of the counter electrode is given to the upper electrode.
    Type: Grant
    Filed: May 19, 2016
    Date of Patent: June 4, 2019
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Iori Aoyama, Takahiro Sasaki, Yuichi Kita, Kazutaka Hanaoka
  • Publication number: 20190164511
    Abstract: In a liquid crystal display device (100), each pixel row group is selected by a common scan signal voltage, each pixel row group including N pixel rows which adjoin one another in a column direction. Where two pixel rows which adjoin each other in a column direction and which are included in different pixel row groups are a first pixel row and a second pixel row, the first pixel row includes a pixel which has a pixel electrode (16) capacitively coupled with a gate bus line (12) which is associated with the second pixel row. When the first pixel row is included in the qth group, the second pixel row is included in the (q+1)th group. A scan signal voltage supplied to gate bus lines which are associated with the (q+1)th group switches from low to high before a scan signal voltage supplied to gate bus lines which are associated with the qth group switches from high to low.
    Type: Application
    Filed: March 14, 2017
    Publication date: May 30, 2019
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Iori AOYAMA, Yuichi KITA, Takahiro SASAKI, Hidekazu MIYATA, Kazutaka HANAOKA
  • Publication number: 20190113810
    Abstract: A liquid crystal display apparatus includes a liquid crystal display panel including a first substrate, a second substrate, and a liquid crystal layer and a plurality of pixels. The first substrate includes a first electrode provided in each of the pixels and a first horizontal alignment film that determines a pretilt orientation of a liquid crystal molecule. The second substrate includes a second electrode provided to face the first electrode and a second horizontal alignment film that determines the pretilt orientation of the liquid crystal molecule. Each of the first and second horizontal alignment films is a photoalignment film. At least one of the first substrate and the second substrate includes an anchoring structure in each of the pixels.
    Type: Application
    Filed: March 28, 2017
    Publication date: April 18, 2019
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: TAKAHIRO SASAKI, IORI AOYAMA, YUICHI KITA, KAZUTAKA HANAOKA
  • Patent number: 10216034
    Abstract: A liquid crystal display device (100) includes a first liquid crystal display panel (1) configured to be capable of taking a transparent displaying state and a second liquid crystal display panel (2), such that the first liquid crystal display panel allows at least a portion of light going out of the second liquid crystal display panel to be transmitted in the transparent displaying state.
    Type: Grant
    Filed: June 12, 2015
    Date of Patent: February 26, 2019
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Yuichi Kita, Yoshiki Nakatani, Takahiro Sasaki, Iori Aoyama, Kazutaka Hanaoka
  • Patent number: 10209582
    Abstract: A liquid crystal display device (100) includes a liquid crystal display panel (1) including a first substrate (10), a second substrate (20), and a liquid crystal layer (30). The first substrate includes a first electrode (11) provided for each pixel, and a second electrode (12) for generating a lateral field across the liquid crystal layer in cooperation with the first electrode. The second substrate includes a third electrode (21) for generating a vertical field across the liquid crystal layer in cooperation with the first electrode and the second electrode. Each pixel is capable of switchably presenting a black displaying state where a vertical field is generated across the liquid crystal layer, a white displaying state where a lateral field is generated across the liquid crystal layer, and a transparent displaying state where a rear face side of the liquid crystal display panel is visible in a see-through manner with no voltage being applied to the liquid crystal layer.
    Type: Grant
    Filed: May 29, 2015
    Date of Patent: February 19, 2019
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Iori Aoyama, Yuichi Kita, Takahiro Sasaki, Yoshiki Nakatani, Kazutaka Hanaoka