Patents by Inventor Hitomi HASEGAWA

Hitomi HASEGAWA 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: 9298049
    Abstract: In one embodiment, a first substrate is provided with first and second main pixel electrodes electrically connected each other extending along a first direction, respectively. A second substrate includes first to third main common electrodes electrically connected each other extending along the first direction, respectively. The first main pixel electrode is arranged between the first and second main common electrodes, and the second main pixel electrode is arranged between the second and third main common electrodes. Four inter-electrode distances are formed. One of the four inter-electrode distances is set to an optimal inter-electrode distance, and one of the four inter-electrode distances is different from at least one of the other three inter-electrode distances. Herein, the optimal inter-electrode distance is defined as follows: in a range of voltage which is applied between the electrodes, more than 90% of a peak transmissivity is obtained by the optimal inter-electrode distance.
    Type: Grant
    Filed: April 22, 2015
    Date of Patent: March 29, 2016
    Assignee: JAPAN DISPLAY INC.
    Inventors: Hitomi Hasegawa, Jin Hirosawa, Arihiro Takeda, Nobuko Fukuoka, Yusuke Morita
  • Publication number: 20150323846
    Abstract: In one embodiment, a first substrate includes a gate line extending in a first direction, a source line extending in a second direction orthogonally crossing the first direction, a pixel electrode including a main pixel electrode extending in the second direction, and a first alignment film covering the pixel electrode. A second substrate includes a common electrode having a pair of main common electrodes arranged on both sides sandwiching the main pixel electrode and a second alignment film covering the common electrode. A liquid crystal layer is held between the first alignment film and the second alignment film and includes liquid crystal molecules. The liquid crystal layer is formed of materials having negative dielectric constant anisotropy, and the liquid crystal molecules are initially aligned substantially in parallel with the first direction when electric field is not impressed between the pixel electrode and the common electrode.
    Type: Application
    Filed: July 16, 2015
    Publication date: November 12, 2015
    Applicant: Japan Display Inc.
    Inventors: Hitomi HASEGAWA, Nobuko Fukuoka
  • Patent number: 9164333
    Abstract: According to one embodiment, a liquid crystal display device includes a first common electrode including a first sub-common electrode extending along a gate line on a first interlayer insulation film, a pixel electrode which includes a first main pixel electrode extending in a second direction on a second interlayer insulation film, and a second common electrode which includes a second sub-common electrode extending in parallel to the first sub-common electrode on the second interlayer insulation film and has the same potential as the first common electrode. The first sub-common electrode is located on the pixel electrode side of a position overlapping the gate line. The second sub-common electrode is opposed to the gate line.
    Type: Grant
    Filed: March 10, 2014
    Date of Patent: October 20, 2015
    Assignee: Japan Display Inc.
    Inventors: Hitomi Hasegawa, Jin Hirosawa
  • Patent number: 9164330
    Abstract: According to one embodiment, a liquid crystal display includes a first substrate including main pixel electrodes, a second substrate including main common electrodes extending substantially in parallel to the main pixel electrodes and arranged on both sides of each of the main pixel electrodes as seen from above, and a liquid crystal layer including liquid crystal molecules held between the first substrate and the second substrate. A horizontal inter-electrode distance in a first direction between the main pixel electrode and the main common electrode is in a range of 11 ?m or more and 13 ?m or less, and a dielectric constant anisotropy of the liquid crystal layer is 10 or more and 16 or less.
    Type: Grant
    Filed: March 5, 2013
    Date of Patent: October 20, 2015
    Assignee: Japan Display Inc.
    Inventors: Hitomi Hasegawa, Jin Hirosawa, Yusuke Morita, Hirokazu Morimoto, Arihiro Takeda
  • Patent number: 9140938
    Abstract: In one embodiment, a first substrate includes a gate line, a source line, a switching element electrically connected with the gate line and the source line, and a pixel electrode including a sub-pixel electrode electrically connected with the switching element in the shape of a belt, and a main pixel electrode electrically connected with the sub-pixel electrode. A first alignment film covers the pixel electrode. A second substrate includes a common electrode having a pair of main common electrodes arranged on both sides sandwiching the main pixel electrode. A second alignment film covers the common electrode. A liquid crystal layer including liquid crystal molecules is held between the first substrate and the second substrate. Volume resistivity values of the first and second alignment films are lower than that of the liquid crystal layer.
    Type: Grant
    Filed: January 25, 2013
    Date of Patent: September 22, 2015
    Assignee: Japan Display Inc.
    Inventors: Hitomi Hasegawa, Hirokazu Morimoto
  • Patent number: 9122111
    Abstract: In one embodiment, a first substrate includes a gate line extending in a first direction, a source line extending in a second direction orthogonally crossing the first direction, a pixel electrode including a main pixel electrode extending in the second direction, and a first alignment film covering the pixel electrode. A second substrate includes a common electrode having a pair of main common electrodes arranged on both sides sandwiching the main pixel electrode and a second alignment film covering the common electrode. A liquid crystal layer is held between the first alignment film and the second alignment film and includes liquid crystal molecules. The liquid crystal layer is formed of materials having negative dielectric constant anisotropy, and the liquid crystal molecules are initially aligned substantially in parallel with the first direction when electric field is not impressed between the pixel electrode and the common electrode.
    Type: Grant
    Filed: February 11, 2013
    Date of Patent: September 1, 2015
    Assignee: Japan Display Inc.
    Inventors: Hitomi Hasegawa, Nobuko Fukuoka
  • Patent number: 9110341
    Abstract: In one embodiment, a first substrate includes a gate line extending in a first direction, a source line extending in a second direction orthogonally crossing the first direction, a sub-pixel electrode extending in the first direction, and a pixel electrode having “n” main pixel electrodes electrically connected with the sub-pixel electrode and extending in the second direction (“n” is positive integer). A second substrate includes a main common electrode extending in the second direction in parallel with the “n” main pixel electrodes, and a liquid crystal layer held between the first and second substrates and including liquid crystal molecules. The dielectric constant anisotropy ?? of the liquid crystal molecules satisfies a following relational expression with respect to a definition depending on an inter-electrode distance between the main pixel electrode and the main common electrode in the first direction. ????0.014×(definition)+(19.
    Type: Grant
    Filed: January 25, 2013
    Date of Patent: August 18, 2015
    Assignee: JAPAN DISPLAY INC.
    Inventors: Yusuke Morita, Jin Hirosawa, Hitomi Hasegawa
  • Publication number: 20150227009
    Abstract: In one embodiment, a first substrate is provided with first and second main pixel electrodes electrically connected each other extending along a first direction, respectively. A second substrate includes first to third main common electrodes electrically connected each other extending along the first direction, respectively. The first main pixel electrode is arranged between the first and second main common electrodes, and the second main pixel electrode is arranged between the second and third main common electrodes. Four inter-electrode distances are formed. One of the four inter-electrode distances is set to an optimal inter-electrode distance, and one of the four inter-electrode distances is different from at least one of the other three inter-electrode distances. Herein, the optimal inter-electrode distance is defined as follows: in a range of voltage which is applied between the electrodes, more than 90% of a peak transmissivity is obtained by the optimal inter-electrode distance.
    Type: Application
    Filed: April 22, 2015
    Publication date: August 13, 2015
    Applicant: Japan Display Inc.
    Inventors: Hitomi HASEGAWA, Jin HIROSAWA, Arihiro TAKEDA, Nobuko FUKUOKA, Yusuke MORITA
  • Patent number: 9052552
    Abstract: In one embodiment, a first substrate is provided with first and second main pixel electrodes electrically connected each other extending along a first direction, respectively. A second substrate includes first to third main common electrodes electrically connected each other extending along the first direction, respectively. The first main pixel electrode is arranged between the first and second main common electrodes, and the second main pixel electrode is arranged between the second and third main common electrodes. Four inter-electrode distances are formed. One of the four inter-electrode distances is set to an optimal inter-electrode distance, and one of the four inter-electrode distances is different from at least one of the other three inter-electrode distances. Herein, the optimal inter-electrode distance is defined as follows: in a range of voltage which is applied between the electrodes, more than 90% of a peak transmissivity is obtained by the optimal inter-electrode distance.
    Type: Grant
    Filed: April 18, 2012
    Date of Patent: June 9, 2015
    Assignee: Japan Display Inc.
    Inventors: Hitomi Hasegawa, Jin Hirosawa, Arihiro Takeda, Nobuko Fukuoka, Yusuke Morita
  • Publication number: 20140267997
    Abstract: According to one embodiment, a liquid crystal display device includes a first common electrode including a first sub-common electrode extending along a gate line on a first interlayer insulation film, a pixel electrode which includes a first main pixel electrode extending in a second direction on a second interlayer insulation film, and a second common electrode which includes a second sub-common electrode extending in parallel to the first sub-common electrode on the second interlayer insulation film and has the same potential as the first common electrode. The first sub-common electrode is located on the pixel electrode side of a position overlapping the gate line. The second sub-common electrode is opposed to the gate line.
    Type: Application
    Filed: March 10, 2014
    Publication date: September 18, 2014
    Applicant: Japan Display Inc.
    Inventors: Hitomi Hasegawa, Jin Hirosawa
  • Patent number: 8786790
    Abstract: In one embodiment, a liquid crystal display device includes a lens array unit having a cylindrical lens array constituted by a plurality of cylindrical lenses each having a lens surface and a generatrix corresponding to the lens surface. The lens surface is arranged in a line in a direction orthogonally crossing the generatrix. A first substrate is arranged at a back side of the lens array unit and includes a pixel electrode in a belt shape extending in a different direction from the direction in which the generatrix extends. The pixel electrode is formed in a V character shape. A second substrate is arranged between the lens array unit and the first substrate including a counter electrode in a belt shape commonly arranged on the pixel electrodes extending in a parallel direction to the pixel electrode.
    Type: Grant
    Filed: March 21, 2012
    Date of Patent: July 22, 2014
    Assignee: Japan Display Inc.
    Inventors: Keisuke Takano, Takashi Sasabayashi, Arihiro Takeda, Keiji Tago, Jin Hirosawa, Hitomi Hasegawa, Yusuke Morita, Hirokazu Morimoto
  • Patent number: 8743332
    Abstract: In one embodiment, a first substrate includes a pixel electrode having a first main electrode in a belt-like shape extending along a first cross line direction which crosses at an acute angle in a counterclockwise direction with respect to an initial alignment direction of liquid crystal molecules, and a second main electrode in the belt-like shape extending along a second cross line direction which crosses at an acute angle in a clockwise direction with respect to the initial alignment direction of the liquid crystal molecules. A second substrate includes a counter electrode having a pair of third main electrodes in the belt-like shape arranged above a pair of regions sandwiching the first main electrode extending along a first cross line direction and a pair of fourth main electrodes in the belt-like shape arranged above a pair of regions sandwiching the second main electrode extending along the second cross line direction.
    Type: Grant
    Filed: December 29, 2011
    Date of Patent: June 3, 2014
    Assignee: Japan Display Inc.
    Inventors: Keisuke Takano, Arihiro Takeda, Takashi Sasabayashi, Nobuko Fukuoka, Yusuke Morita, Jin Hirosawa, Hitomi Hasegawa, Yoshitaka Yamada, Keiji Tago, Hirokazu Morimoto
  • Publication number: 20130265515
    Abstract: In one embodiment, a first substrate includes a gate line, a source line, a switching element electrically connected with the gate line and the source line, and a pixel electrode including a sub-pixel electrode electrically connected with the switching element in the shape of a belt, and a main pixel electrode electrically connected with the sub-pixel electrode. A first alignment film covers the pixel electrode. A second substrate includes a common electrode having a pair of main common electrodes arranged on both sides sandwiching the main pixel electrode. A second alignment film covers the common electrode. A liquid crystal layer including liquid crystal molecules is held between the first substrate and the second substrate. Volume resistivity values of the first and second alignment films are lower than that of the liquid crystal layer.
    Type: Application
    Filed: January 25, 2013
    Publication date: October 10, 2013
    Inventors: Hitomi HASEGAWA, Hirokazu Morimoto
  • Publication number: 20130258226
    Abstract: In one embodiment, a first substrate includes a gate line extending in a first direction, a source line extending in a second direction orthogonally crossing the first direction, a pixel electrode including a main pixel electrode extending in the second direction, and a first alignment film covering the pixel electrode. A second substrate includes a common electrode having a pair of main common electrodes arranged on both sides sandwiching the main pixel electrode and a second alignment film covering the common electrode. A liquid crystal layer is held between the first alignment film and the second alignment film and includes liquid crystal molecules. The liquid crystal layer is formed of materials having negative dielectric constant anisotropy, and the liquid crystal molecules are initially aligned substantially in parallel with the first direction when electric field is not impressed between the pixel electrode and the common electrode.
    Type: Application
    Filed: February 11, 2013
    Publication date: October 3, 2013
    Inventors: Hitomi HASEGAWA, Nobuko Fukuoka
  • Publication number: 20130242216
    Abstract: In one embodiment, a first substrate includes a gate line extending in a first direction, a source line extending in a second direction orthogonally crossing the first direction, a sub-pixel electrode extending in the first direction, and a pixel electrode having “n” main pixel electrodes electrically connected with the sub-pixel electrode and extending in the second direction (“n” is positive integer). A second substrate includes a main common electrode extending in the second direction in parallel with the “n” main pixel electrodes, and a liquid crystal layer held between the first and second substrates and including liquid crystal molecules. The dielectric constant anisotropy ?? of the liquid crystal molecules satisfies a following relational expression with respect to a definition depending on an inter-electrode distance between the main pixel electrode and the main common electrode in the first direction. ????0.014×(definition)+(19.
    Type: Application
    Filed: January 25, 2013
    Publication date: September 19, 2013
    Inventors: Yusuke MORITA, Jin HIROSAWA, Hitomi HASEGAWA
  • Publication number: 20130242214
    Abstract: According to one embodiment, a liquid crystal display includes a first substrate including a main pixel electrode, a second substrate including a main common electrode extending substantially in parallel to the main pixel electrode on both sides of the main pixel electrode, and a liquid crystal layer including liquid crystal molecules held between the first substrate and the second substrate. A horizontal inter-electrode distance in a first direction between the main pixel electrode and the main common electrode is in a range of 11 ?m or more and 13 ?m or less, and a dielectric constant anisotropy of the liquid crystal layer is 10 or more.
    Type: Application
    Filed: March 5, 2013
    Publication date: September 19, 2013
    Inventors: Hitomi HASEGAWA, Jin Hirosawa, Yusuke Morita, Hirokazu Morimoto, Arihiro Takeda
  • Publication number: 20120293752
    Abstract: A liquid crystal display device includes a first substrate having a pair of first signal lines and a pair of second signal lines extending in a first and orthogonal second directions, and a pixel electrode arranged between the pair of second signal lines and extending in the second direction, and a second substrate having a first main common electrode and a second main common electrode respectively facing the pair of second signal lines and extending in the second direction. An effective domain is surrounded by the pairs of first and second signal lines, or by the pair of the first signal lines and the first and the second main common electrodes. A first area formed of an electrode portion including the pixel electrode is smaller than a second area formed of an aperture portion other than the first area in the effective domain.
    Type: Application
    Filed: May 14, 2012
    Publication date: November 22, 2012
    Applicant: Japan Display Central Inc.
    Inventors: Arihiro TAKEDA, Jin HIROSAWA, Hitomi HASEGAWA, Yusuke MORITA, Hirokazu MORIMOTO
  • Publication number: 20120268705
    Abstract: In one embodiment, a first substrate is provided with first and second main pixel electrodes electrically connected each other extending along a first direction, respectively. A second substrate includes first to third main common electrodes electrically connected each other extending along the first direction, respectively. The first main pixel electrode is arranged between the first and second main common electrodes, and the second main pixel electrode is arranged between the second and third main common electrodes. Four inter-electrode distances are formed. One of the four inter-electrode distances is set to an optimal inter-electrode distance, and one of the four inter-electrode distances is different from at least one of the other three inter-electrode distances. Herein, the optimal inter-electrode distance is defined as follows: in a range of voltage which is applied between the electrodes, more than 90% of a peak transmissivity is obtained by the optimal inter-electrode distance.
    Type: Application
    Filed: April 18, 2012
    Publication date: October 25, 2012
    Applicant: Japan Display Central Inc.
    Inventors: Hitomi Hasegawa, Jin Hirosawa, Arihiro Takeda, Nobuko Fukuoka, Yusuke Morita
  • Publication number: 20120249930
    Abstract: In one embodiment, a liquid crystal display device includes a lens array unit having a cylindrical lens array constituted by a plurality of cylindrical lenses each having a lens surface and a generatrix corresponding to the lens surface. The lens surface is arranged in a line in a direction orthogonally crossing the generatrix. A first substrate is arranged at a back side of the lens array unit and includes a pixel electrode in a belt shape extending in a different direction from the direction in which the generatrix extends. The pixel electrode is formed in a V character shape. A second substrate is arranged between the lens array unit and the first substrate including a counter electrode in a belt shape commonly arranged on the pixel electrodes extending in a parallel direction to the pixel electrode.
    Type: Application
    Filed: March 21, 2012
    Publication date: October 4, 2012
    Applicant: Toshiba Mobile Display Co., Ltd.
    Inventors: Keisuke Takano, Takashi Sasabayashi, Arihiro Takeda, Keiji Tago, Jin Hirosawa, Hitomi Hasegawa, Yusuke Morita, Hirokazu Morimoto
  • Publication number: 20120182509
    Abstract: In one embodiment, a first substrate includes a pixel electrode having a first main electrode in a belt-like shape extending along a first cross line direction which crosses at an acute angle in a counterclockwise direction with respect to an initial alignment direction of liquid crystal molecules, and a second main electrode in the belt-like shape extending along a second cross line direction which crosses at an acute angle in a clockwise direction with respect to the initial alignment direction of the liquid crystal molecules. A second substrate includes a counter electrode having a pair of third main electrodes in the belt-like shape arranged above a pair of regions sandwiching the first main electrode extending along a first cross line direction and a pair of fourth main electrodes in the belt-like shape arranged above a pair of regions sandwiching the second main electrode extending along the second cross line direction.
    Type: Application
    Filed: December 29, 2011
    Publication date: July 19, 2012
    Applicant: Toshiba Mobile Display Co., Ltd.
    Inventors: Keisuke TAKANO, Arihiro TAKEDA, Takashi SASABAYASHI, Nobuko FUKUOKA, Yusuke MORITA, Jin HIROSAWA, Hitomi HASEGAWA, Yoshitaka YAMADA, Keiji TAGO, Hirokazu MORIMOTO