Patents by Inventor Hidetoshi Nakagawa

Hidetoshi Nakagawa 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: 20160048064
    Abstract: Provided is a display apparatus which narrows the frame of the panel to a level that the seal for bonding the substrates is not easily broken, and reduces an influence of a parasitic capacitance due to portions in which scanning lines and signal lines intersect. The display apparatus includes two substrates facing each other, a first signal line layer provided on one substrate of the two substrates, a second signal line layer provided in the first signal line layer through a plurality of first insulation layers, and a sealing body which is provided on a peripheral edge part of the one substrate through one or a plurality of second insulation layers having the number of layers less than the number of layers of the first insulation layer, and seals an opposing gap between the two substrates.
    Type: Application
    Filed: May 26, 2014
    Publication date: February 18, 2016
    Inventor: Hidetoshi Nakagawa
  • Patent number: 9196206
    Abstract: In one embodiment of the present invention, each pixel includes first and second subpixels. CS bus lines connected to the respective storage capacitors of the first and second subpixels are electrically independent of each other. A CS voltage has a waveform that inverts its polarity at least once a frame, which includes a first subframe for sequentially scanning a series of odd rows and a second SF for sequentially scanning even rows that have been skipped during the first SF. A source signal voltage varies so as to have two frames or subframes with mutually opposite polarities. A CS voltage has a waveform that has quite opposite consequences on the effective voltage of a subpixel of a pixel connected to the jth scan line to be selected during the first subframe and on that of another subpixel of a pixel connected to the (j+1)th scan line to be selected during the second subframe.
    Type: Grant
    Filed: April 22, 2008
    Date of Patent: November 24, 2015
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Masae Kitayama, Fumikazu Shimoshikiryoh, Kentaroh Irie, Toshihide Tsubata, Naoshi Yamada, Hidetoshi Nakagawa
  • Patent number: 9076395
    Abstract: A liquid crystal display device (100) according to the present invention includes a plurality of pixels arrayed in a matrix, n number of the pixels (n is an even number of 4 or greater) being included in a color display pixel (CP). The liquid crystal display device includes an active matrix substrate (10) including a plurality of scanning lines (12) extending in a row direction and a plurality of signal lines (13) extending in a column direction; and a signal line driving circuit (3) that supplies, as a display signal, a gray scale voltage of a positive or negative polarity to each of the plurality of signal lines. The plurality of signal lines include a first type of signal line (13a) which does not intersect another signal line, and a second type of signal line (13b) which intersects a signal line adjacent thereto outside a display area in the state where an insulating film (16) is interposed therebetween.
    Type: Grant
    Filed: June 2, 2011
    Date of Patent: July 7, 2015
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Akihiro Shohraku, Toshifumi Yagi, Masahiro Matsuda, Hidetoshi Nakagawa, Takuya Ohishi, Tomofumi Kubota, Kazushige Miyamoto, Haruhisa Suzuki
  • Publication number: 20150044789
    Abstract: A method of manufacturing an array substrate 20 according to the present invention includes a line forming step, and line forming step includes following performances. A plurality of source lines 27 are formed on a glass substrate GS so as to extend from a first region A1 on the glass substrate GS to a second region A2 that is adjacent to the first region on an outer side thereof. A plurality of source driver side check lines 45A are formed on the glass substrate GS so as to extend from the second region A2 to a third region that is adjacent to the first region A1 on an outer side thereof and adjacent to the second region A2. A plurality of first line connection portions 49 are formed in the second region A2 and the first line connection portions 49 connect the source lines 27 and the first source driver side check lines 45A. A capacity stem line 43 and a common line 44 are formed to extend from the first region A1 to the third region A3.
    Type: Application
    Filed: July 12, 2012
    Publication date: February 12, 2015
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Takaharu Yamada, Ryohki Itoh, Masahiro Yoshida, Hidetoshi Nakagawa, Takuya Ohishi, Masahiro Matsuda, Kazutoshi Kida
  • Patent number: 8670090
    Abstract: The present invention provides a liquid crystal display device capable of improving display qualities in a frame region and a production method thereof.
    Type: Grant
    Filed: May 1, 2008
    Date of Patent: March 11, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Hidetoshi Nakagawa
  • Patent number: 8553195
    Abstract: A substrate for a display panel by which a boundary position of divided exposure regions of elements formed by divisional exposure can be easily identified and process management and evaluation can be easily performed, a display panel having the substrate, a method of producing the substrate, and a method of producing the display panel. A substrate 11 for a display panel includes two or more thin film patterns formed by divisional exposure by which a region to be exposed is divided into a plurality of exposure regions and exposure is made on each of the divided exposure regions, wherein boundary positions of the divided exposure regions of the two or more thin film patterns do not coincide with each other, and a marking 3 indicating the boundary position of the divided exposure regions of at least one of the two or more thin film patterns.
    Type: Grant
    Filed: February 2, 2007
    Date of Patent: October 8, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Hidetoshi Nakagawa
  • Patent number: 8471800
    Abstract: A display device displays images with a plurality of signal lines and includes spare lines, each being arranged to be connectable to the signal lines so as to be used for recovery of the signal lines from disconnection. Each of the spare lines has constricted sections for cutting. With this arrangement, it is possible to easily and properly recover the signal lines from disconnection.
    Type: Grant
    Filed: September 6, 2012
    Date of Patent: June 25, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Hidetoshi Nakagawa
  • Patent number: 8411215
    Abstract: Retention capacitor upper electrodes and wires are provided facing a retention capacitor line across an insulating film so as to form a retention capacitor. The retention capacitor line includes a slit penetrating the retention capacitor line in a direction perpendicular to a substrate. The slit is formed so as to overlap regions facing regions in which both wires are formed. This allows for provision of an active matrix substrate capable of repairing defects so that they are less visible, without decreasing an aperture ratio of each pixel.
    Type: Grant
    Filed: May 12, 2008
    Date of Patent: April 2, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Hidetoshi Nakagawa
  • Publication number: 20130070003
    Abstract: A liquid crystal display device (100) according to the present invention includes a plurality of pixels arrayed in a matrix, n number of the pixels (n is an even number of 4 or greater) being included in a color display pixel (CP). The liquid crystal display device includes an active matrix substrate (10) including a plurality of scanning lines (12) extending in a row direction and a plurality of signal lines (13) extending in a column direction; and a signal line driving circuit (3) that supplies, as a display signal, a gray scale voltage of a positive or negative polarity to each of the plurality of signal lines. The plurality of signal lines include a first type of signal line (13a) which does not intersect another signal line, and a second type of signal line (13b) which intersects a signal line adjacent thereto outside a display area in the state where an insulating film (16) is interposed therebetween.
    Type: Application
    Filed: June 2, 2011
    Publication date: March 21, 2013
    Inventors: Akihiro Shohraku, Toshifumi Yagi, Masahiro Matsuda, Hidetoshi Nakagawa, Takuya Ohishi, Tomofumi Kubota, Kazushige Miyamoto, Haruhisa Suzuki
  • Patent number: 8362993
    Abstract: The present invention provides a liquid crystal display panel having a narrower frame region than in the conventional art. The liquid crystal display device of the present invention includes a liquid crystal layer 42 interposed between a first substrate 10 and a second substrate 20, and a sealant portion 32 that surrounds the liquid crystal layer, the sealant portion 32 being made of a sealant containing a photocurable resin and conductive beads. The first substrate 10 includes a recess 14a in which an organic insulating film 14 is not present in a non-display region. At least a portion of a black matrix 22a overlaps the recess 14a. A portion of the sealant portion 32 is disposed in the recess 14a. An opposite electrode 24 is not formed in a region of the second substrate 20 that faces the recess 14a.
    Type: Grant
    Filed: July 28, 2009
    Date of Patent: January 29, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Hidetoshi Nakagawa
  • Patent number: 8351016
    Abstract: A display device 1 of the present invention includes a first conductive layer 20 and a second conductive layer 21 arranged across an insulating layer 24 from the first conductive layer 20. An overlap section 40 at which the first conductive layer 20 and the second conductive layer 21 overlap each other is provided. At least one of the first conductive layer 20 and the second conductive layer 21 includes a slit portion 210a that is arranged in the overlap section 40. The width of the slit portion 210a is set to be smaller at a medial area 82 except both end areas 81 of the slit portion 210a, than at the both end areas 81.
    Type: Grant
    Filed: December 3, 2007
    Date of Patent: January 8, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Hidetoshi Nakagawa
  • Publication number: 20120326953
    Abstract: A display device displays images with a plurality of signal lines and includes spare lines, each being arranged to be connectable to the signal lines so as to be used for recovery of the signal lines from disconnection. Each of the spare lines has constricted sections for cutting. With this arrangement, it is possible to easily and properly recover the signal lines from disconnection.
    Type: Application
    Filed: September 6, 2012
    Publication date: December 27, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Hidetoshi NAKAGAWA
  • Patent number: 8314424
    Abstract: A TFT (5) includes: a gate electrode (12a); a first semiconductor portion (14a) that overlaps the gate electrode (12a) having the gate insulating film (13) interposed therebetween; a source electrode (15a) and a drain electrode (15b) that overlap the gate electrode (12a) having the gate insulating film (13) and the first semiconductor portion (14a) interposed therebetween; a second semiconductor portion (14b) that overlaps the gate electrode (12a) between the gate insulating film (13) and the source electrode (15a); and a conductive portion (15c) that overlaps the gate electrode (12a) having the gate insulating film (13) and the second semiconductor portion (14b) interposed therebetween. The TFT (5) brings the source line (15a) and the pixel electrode (17) into conduction by a switching element that includes short-circuit portion at the source electrode (15a) and the drain electrode (15b), the second semiconductor portion (14b) and the conductive portion (15c).
    Type: Grant
    Filed: August 5, 2008
    Date of Patent: November 20, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Hidetoshi Nakagawa
  • Patent number: 8284141
    Abstract: A display device displays images with a plurality of signal lines and includes spare lines, each being arranged to be connectable to the signal lines so as to be used for recovery of the signal lines from disconnection. Each of the spare lines has constricted sections for cutting. With this arrangement, it is possible to easily and properly recover the signal lines from disconnection.
    Type: Grant
    Filed: February 17, 2012
    Date of Patent: October 9, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Hidetoshi Nakagawa
  • Patent number: 8274621
    Abstract: A display device 1 according to the present invention, having a display area AA capable of image display and a nondisplay area PA provided outside the display area AA, includes a first wiring line 14 and a second wiring line 20 in the nondisplay area PA. The second wiring line 20 is arranged across an insulating layer 17 from the first wiring line 14, so that a crossover section 25 at which the first wiring line 14 intersects with the second wiring line 20 is provided. The second wiring line 20 includes a plurality of branch lines 22, 23 branching therefrom and being located in the crossover section 25, while the first wiring line 14 includes a plurality of slit portions 260A, 270A and the like crossing the branch lines 22, 23.
    Type: Grant
    Filed: December 25, 2007
    Date of Patent: September 25, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Hidetoshi Nakagawa
  • Publication number: 20120229739
    Abstract: A liquid crystal display device (100) according to the present invention includes a vertical alignment type liquid crystal layer (3); and a pair of optical alignment films (12, 22). A plurality of picture elements (R, G, B, Y) each include four liquid crystal domains (D1 through D4) in which tilt directions of liquid crystal molecules when a voltage is applied are different. The four liquid crystal domains are located in a matrix of 2 rowsĂ—2 columns. The pair of optical alignment films have such an alignment regulation force that causes an identical alignment pattern to appear in repetition in the liquid crystal layer along a first direction which is parallel to one of a row direction and a column direction, with 2n pixels (n is an integer of 1 or greater) being a minimum unit.
    Type: Application
    Filed: November 16, 2010
    Publication date: September 13, 2012
    Inventors: Iichiroh Inoue, Koichi Miyachi, Hidetoshi Nakagawa, Akihiro Shohraku
  • Patent number: 8228480
    Abstract: A liquid crystal device 1 of the present invention includes a first conductive layer 20 and a second conductive layer 21 arranged across an insulating layer from the first conductive layer 20. A crossover section 40 at which the first conductive layer 20 and the second conductive layer 21 intersect each other is provided. At least one of the first conductive layer 20 and the second conductive layer 21 includes a slit portion 210a and a cutout portion 201b, which are arranged in the crossover section 40 so that the cutout portion 210b is at a predetermined distance from the slit portion 210a.
    Type: Grant
    Filed: April 6, 2007
    Date of Patent: July 24, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Hidetoshi Nakagawa
  • Publication number: 20120146970
    Abstract: A display device displays images with a plurality of signal lines and includes spare lines, each being arranged to be connectable to the signal lines so as to be used for recovery of the signal lines from disconnection. Each of the spare lines has constricted sections for cutting. With this arrangement, it is possible to easily and properly recover the signal lines from disconnection.
    Type: Application
    Filed: February 17, 2012
    Publication date: June 14, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Hidetoshi NAKAGAWA
  • Patent number: 8189152
    Abstract: The present invention provides a liquid crystal display device and a production method of a liquid crystal display device, capable of improving display qualities in a display region close to a frame region without causing any defects.
    Type: Grant
    Filed: December 18, 2007
    Date of Patent: May 29, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Hidetoshi Nakagawa
  • Patent number: 8189154
    Abstract: A liquid crystal display device according to the present invention includes a plurality of pixels, each including first and second subpixels SP-A and SP-B. The reference alignment azimuths of liquid crystal molecules in the liquid crystal layer of the first subpixel SP-A include only first and second reference alignment azimuths with no third or fourth one. The reference alignment azimuths of liquid crystal molecules in the liquid crystal layer of the second subpixel SP-B include only the third and fourth reference alignment azimuths with no first or second one. In one vertical scanning period, the absolute value of an effective voltage applied to the liquid crystal layer of the first subpixel SP-A is greater than that of an effective voltage applied to the liquid crystal layer of the second subpixel SP-B.
    Type: Grant
    Filed: December 5, 2008
    Date of Patent: May 29, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Hidetoshi Nakagawa