Patents by Inventor Takahiro Ochiai

Takahiro Ochiai 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).

  • DRIVE CIRCUIT FOR DISPLAY PANEL, AND DISPLAY DEVICE
    Publication number: 20120075282
    Abstract: In a unit drive circuit in each stage in a shift register, a transistor which is maintained in ON state during a period where the unit drive circuit in the stage does not perform an outputting operation is configured not to generate Vth shift. As switches, transistors T6A, T6B are connected between the output terminal OUT and AC power sources VA, VB. At least one of T6A, T6B is brought into ON state and T6A, T6B are alternately brought into OFF state during the period other than the outputting operation period. VA, VB supply L level during a period where T6A, T6B are in ON state, while VA, VB supply a ground potential GND which is an intermediate potential between an H level and an L level during a period where T6A, T6B are in OFF state.
    Type: Application
    Filed: September 22, 2011
    Publication date: March 29, 2012
    Inventors: Hiroyuki HIGASHIJIMA, Takahiro Ochiai, Mitsuru Goto
  • Display device
    Patent number: 8144297
    Abstract: A display device includes a pair of substrates with liquid crystal therebetween, and a plurality of pixel regions provided on one substrate. Each pixel region is constituted of one and another region including a switching element, a pixel electrode, and a counter electrode. In the one region, the counter electrode extends substantially planar at a center except at a periphery of the one region, and the pixel electrode is constituted of a first group of electrodes which extend in one direction and arranged in parallel at a first distance. In the another region the counter electrode is constituted of a group of electrodes which extend in one direction and arranged in parallel in a direction which intersects the one direction in the another region, and the pixel electrode is constituted of a second group of electrodes which extend in the one direction and arranged in parallel at a second distance.
    Type: Grant
    Filed: May 10, 2011
    Date of Patent: March 27, 2012
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Yoshiaki Nakayoshi, Kazuhiko Yanagawa, Takahiro Ochiai, Hirotaka Imayama
  • Liquid crystal display device having rectangular-shaped pixel electrodes overlapping with comb-shaped counter electrodes in plan view
    Patent number: 8134673
    Abstract: The present invention realizes a bright image display by enhancing a numerical aperture of pixels. At least a portion of a pixel electrode is overlapped to a thin film transistor by way of a first insulation film, the pixel electrode is connected to an output electrode of the thin film transistor via a contact hole which is formed in the first insulation film, the counter electrode is arranged above the pixel electrode by way of a second insulation film in a state that the counter electrode is overlapped to the pixel electrode, the counter electrode is formed at a position avoiding the contact hole formed in the first insulation film as viewed in a plan view, and at least a portion of the counter electrode is overlapped to the thin film transistor.
    Type: Grant
    Filed: June 6, 2011
    Date of Patent: March 13, 2012
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Takahiro Ochiai, Tohru Sasaki, Hirotaka Imayama, Masateru Morimoto
  • Display Device
    Publication number: 20120002152
    Abstract: A display device includes a plurality of pixel regions each of which is surrounded by a pair of gate signal lines and a pair of the drain signal lines. Each of the pixel regions includes a first electrode and a second electrode formed on one substrate and each of the pixel regions is constituted of a first region and a second region which are arranged in a direction in which the pair of the drain signal lines extend. In the pixel region, the first electrode is formed in a planar shape and below an insulation film, and the second electrode has a plurality of linear parts which extend linearly and are arranged with respect to each other and is formed above the insulation film.
    Type: Application
    Filed: September 13, 2011
    Publication date: January 5, 2012
    Inventors: Yoshiaki Nakayoshi, Kazuhiko Yanagawa, Takahiro Ochiai, Hirotaka Imayama
  • BIDIRECTIONAL SHIFT REGISTER AND IMAGE DISPLAY DEVICE USING THE SAME
    Publication number: 20110316831
    Abstract: A plurality of cascaded unit register circuits which comprises a bidirectional shift register include main stages and dummy stages at the top before the main stages and dummy stages at the bottom after the main stages. A k-th stage outputs a pulse Pk in synchronization with a clock signal with a reference point N1 being at H level. The main stages include terminals NSF and NSB for setting N1 to H to which Pk?1 and Pk+1 are input, respectively, and terminals NRB and NRF for setting N1 to L level to which Pk?2 and Pk+2 are input, respectively. The order of generation of clock signals is reversed according to the direction of a shift, and whether a start trigger signal is applied to a top stage or a bottom stage is switched. Top dummy stages do not have NRB. Bottom dummy stages do not have NRF.
    Type: Application
    Filed: June 21, 2011
    Publication date: December 29, 2011
    Inventors: Takahiro OCHIAI, Mitsuru Goto, Hiroko Sehata, Hiroyuki Higashijima
  • BIDIRECTIONAL SHIFT REGISTER AND IMAGE DISPLAY DEVICE USING THE SAME
    Publication number: 20110310074
    Abstract: A bidirectional shift register outputs pulses from a plurality of cascaded unit register circuits in a shift order which is one of a forward direction and a reverse direction. A ?th stage of unit register circuit (38) has two set terminals connected to respective outputs of (??1)th and (?+1)th stages and two reset terminals connected to respective outputs of (?+2)th and (??2)th stages. The unit register circuit (38) sets, when a pulse is input to any one of the set terminals, a reference point N1 to an H level, and, when a pulse is input to any one of the reset terminals, N1 to an L level. The order of phase change of clock signals is reversed according to the direction of a shift, and whether a start trigger signal is applied to a top stage or a bottom stage is switched.
    Type: Application
    Filed: June 21, 2011
    Publication date: December 22, 2011
    Inventors: Takahiro OCHIAI, Mitsuru GOTO, Hiroko SEHATA, Hiroyuki HIGASHIJIMA
  • Liquid crystal display device with the pixel electrode being electrically coupled to the active element via a portion defining a clearance between the counter electrodes
    Patent number: 8064026
    Abstract: A liquid crystal display device having a liquid crystal display panel includes a first substrate, a second substrate, and liquid crystal interposed between the first and second substrates. The first substrate includes an active element, a first insulating film formed on the active element, a plurality of first electrodes disposed on the first insulating film, a second insulating film disposed on the first electrodes, and a pixel electrode disposed on the second insulating film. The pixel electrode is electrically coupled to the active element via a portion defining a contact hole formed in a portion defining a clearance between the plurality of first electrodes.
    Type: Grant
    Filed: June 17, 2010
    Date of Patent: November 22, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventors: Takahiro Ochiai, Takayuki Nakao, Toshio Miyazawa, Masahiro Maki, Tohru Sasaki
  • Liquid crystal display device
    Publication number: 20110242471
    Abstract: A liquid crystal display device having a liquid crystal display panel includes a first substrate, a second substrate, and liquid crystal interposed between the first and second substrates. The first substrate includes an active element, a first insulating film formed on the active element, a plurality of first electrodes disposed on the first insulating film, a second insulating film disposed on the first electrodes, and a pixel electrode disposed on the second insulating film. The pixel electrode is electrically coupled to the active element via a portion defining a contact hole formed in a portion defining a clearance between the plurality of first electrodes.
    Type: Application
    Filed: June 13, 2011
    Publication date: October 6, 2011
    Inventors: Takahiro Ochiai, Takayuki Nakao, Toshio Miyazawa, Masahiro Maki, Tohru Sasaki
  • Liquid crystal display device having rectangular-shaped pixel electrodes overlapping with comb-shaped counter electrodes in plan view
    Publication number: 20110234959
    Abstract: The present invention realizes a bright image display by enhancing a numerical aperture of pixels. At least a portion of a pixel electrode is overlapped to a thin film transistor by way of a first insulation film, the pixel electrode is connected to an output electrode of the thin film transistor via a contact hole which is formed in the first insulation film, the counter electrode is arranged above the pixel electrode by way of a second insulation film in a state that the counter electrode is overlapped to the pixel electrode, the counter electrode is formed at a position avoiding the contact hole formed in the first insulation film as viewed in a plan view, and at least a portion of the counter electrode is overlapped to the thin film transistor.
    Type: Application
    Filed: June 6, 2011
    Publication date: September 29, 2011
    Inventors: Takahiro Ochiai, Tohru Sasaki, Hirotaka Imayama, Masateru Morimoto
  • Display Device
    Publication number: 20110211150
    Abstract: A display device includes a pair of substrates with liquid crystal therebetween, and a plurality of pixel regions provided on one substrate. Each pixel region is constituted of one and another region including a switching element, a pixel electrode, and a counter electrode. In the one region, the counter electrode extends substantially planar at a center except at a periphery of the one region, and the pixel electrode is constituted of a first group of electrodes which extend in one direction and arranged in parallel at a first distance. In the another region the counter electrode is constituted of a group of electrodes which extend in one direction and arranged in parallel in a direction which intersects the one direction in the another region, and the pixel electrode is constituted of a second group of electrodes which extend in the one direction and arranged in parallel at a second distance.
    Type: Application
    Filed: May 10, 2011
    Publication date: September 1, 2011
    Inventors: Yoshiaki Nakayoshi, Kazuhiko Yanagawa, Takahiro Ochiai, Hirotaka Imayama
  • Liquid crystal display device
    Patent number: 7990500
    Abstract: A liquid crystal display device comprising a liquid crystal display panel that has a first substrate (SUB1), a second substrate (SUB2) disposed so as to oppose the first substrate (SUB1), and a liquid crystal layer (LC) sandwiched between the first substrate (SUB1) and the second substrate (SUB2); wherein the first substrate (SUB1) has a reflective electrode (RAL) having a surface formed in an irregular shape; an organic insulation film (18) formed in a layer above the reflective electrode (RAL); a transparent electrode (19) formed in a layer above the organic insulation film (18); an inorganic insulation film (20) formed in a layer above the transparent electrode (19); and a pixel electrode (PIX) formed in a layer above the inorganic insulation film (20).
    Type: Grant
    Filed: July 23, 2008
    Date of Patent: August 2, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventors: Junji Tanno, Takahiro Ochiai
  • Transflective Liquid Crystal Display Device
    Publication number: 20110176094
    Abstract: A transflective liquid crystal display device including a liquid crystal display panel which includes a pair of substrates; liquid crystal which is sandwiched between the pair of substrates; a plurality of sub pixels each of which includes a transmissive portion and a reflective portion, each sub pixel having a pixel electrode formed on one substrate out of the pair of substrates and a counter electrode formed on the one substrate, the pixel electrode being arranged in common in the transmissive portion and the reflective portion and the counter electrode being arranged individually in the transmissive portion and the reflective portion in one sub pixel, the pixel electrode and the counter electrode generating an electric field therebetween thus driving the liquid crystal. The liquid crystal display panel includes color filters having different lengths or different shape portions, for example.
    Type: Application
    Filed: April 4, 2011
    Publication date: July 21, 2011
    Inventors: Masateru Morimoto, Takahiro Ochiai
  • GATE SIGNAL LINE DRIVING CIRCUIT AND DISPLAY DEVICE
    Publication number: 20110157112
    Abstract: A gate signal line driving circuit and a display device includes first and second low voltage application switching elements that supply a low voltage to gate signal lines, a holding capacitor that is connected to a reset target node and supplies an ON signal towards the first and second low voltage application switching elements in a signal low period, first and third control switching elements the one ends of which are connected to the switch input of the first or second low voltage application switching element, and second and fourth control switching elements which each are provided between the switch input of the first or second low voltage application switching element and one end of the holding capacitor. In a startup period, a high voltage is supplied to the holding capacitor through the first to fourth control switching elements.
    Type: Application
    Filed: December 23, 2010
    Publication date: June 30, 2011
    Inventors: Takeshi Shibata, Yoshihiro Kotani, Takahiro Ochiai, Mitsuru Goto
  • Liquid crystal display device having rectangular-shaped pixel electrodes overlapping with comb-shaped counter electrodes in plan view
    Patent number: 7961286
    Abstract: The present invention realizes a bright image display by enhancing a numerical aperture of pixels. At least a portion of a pixel electrode is overlapped to a thin film transistor by way of a first insulation film, the pixel electrode is connected to an output electrode of the thin film transistor via a contact hole which is formed in the first insulation film, the counter electrode is arranged above the pixel electrode by way of a second insulation film in a state that the counter electrode is overlapped to the pixel electrode, the counter electrode is formed at a position avoiding the contact hole formed in the first insulation film as viewed in a plan view, and at least a portion of the counter electrode is overlapped to the thin film transistor.
    Type: Grant
    Filed: September 8, 2009
    Date of Patent: June 14, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventors: Takahiro Ochiai, Tohru Sasaki, Hirotaka Imayama, Masateru Morimoto
  • Display device
    Patent number: 7952673
    Abstract: The present invention provides a liquid crystal display device which exhibits the excellent wide viewing angle characteristic and the high-speed responsiveness. A pixel region includes a switching element which is operated in response to a scanning signal from a gate signal line, a pixel electrode to which a video signal from a drain signal line is supplied through a switching element, and a counter electrode which generates an electric field between the counter electrode and the pixel electrode. The pixel region is constituted of divided respective regions.
    Type: Grant
    Filed: April 22, 2009
    Date of Patent: May 31, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventors: Yoshiaki Nakayoshi, Kazuhiko Yanagawa, Takahiro Ochiai, Hirotaka Imayama
  • Liquid crystal display device
    Patent number: 7948587
    Abstract: Reflective electrodes having unevenness are formed on a resin layer of a TFT substrate. A coating-type ITO film having a film thickness of 0.5 ?m to 1 ?m which constitute a pixel electrode is applied to the reflective electrode. A surface of the coating-type ITO film is leveled. A capacitive insulation film is formed on the pixel electrode, and a comb-teeth-shaped common electrode is formed on the capacitive insulation film. When a voltage is applied between the common electrode and the pixel electrode, liquid crystal is controlled by a leaked electric field. Since the common electrode is formed in a planar plane, a thickness of a liquid crystal layer can be made uniform.
    Type: Grant
    Filed: September 4, 2008
    Date of Patent: May 24, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventors: Daisuke Sonoda, Takahiro Ochiai, Isao Suzumura
  • Transflective liquid crystal display device
    Patent number: 7944529
    Abstract: A transflective liquid crystal display device with improved display quality in which the liquid initial alignment direction of the liquid crystal layer is in a direction perpendicular to the extending direction of a clearance between the counter electrode of a transmission portion and a counter electrode of a reflection portion or in a direction within a range of ±2° in the clockwise direction perpendicular to the extending direction of the clearance in a case where the liquid crystal layer comprises positive type liquid crystals, or the liquid crystal initial alignment direction of the liquid crystal layer is in a direction parallel with the extending direction of a clearance, or a direction within a range of ±2° in the clockwise direction relative to the extending direction of the clearance in a case where the liquid crystal layer comprises negative type liquid crystals.
    Type: Grant
    Filed: October 7, 2010
    Date of Patent: May 17, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventors: Takahiro Ochiai, Toshio Miyazawa, Masahiro Maki, Tohru Sasaki, Masateru Morimoto
  • Liquid crystal display device with orientation control projection having light shielding
    Patent number: 7936436
    Abstract: The present invention lowers leaking of light at the time of performing a black display of VA-type liquid crystal display device and, at the same time, prevents lowering of a numerical aperture. In a liquid crystal display device having a liquid crystal display panel which sandwiches a liquid crystal material between a first substrate having a pixel electrode and a second substrate having a counter electrode, the second substrate includes an orientation control projection which is formed by forming a conductive film on the second substrate, by forming an insulation film on the conductive film and, thereafter, by patterning the insulation film, and a light shielding layer which is formed by patterning the conductive film using the orientation control projection as a mask.
    Type: Grant
    Filed: November 4, 2009
    Date of Patent: May 3, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventors: Takahiro Ochiai, Tohru Sasaki
  • Display device
    Patent number: 7924384
    Abstract: The present invention provides a liquid crystal display device which exhibits the excellent wide viewing angle characteristic and the high-speed responsiveness. A pixel region includes a switching element which is operated in response to a scanning signal from a gate signal line, a pixel electrode to which a video signal from a drain signal line is supplied through a switching element, and a counter electrode which generates an electric field between the counter electrode and the pixel electrode. The pixel region is constituted of divided respective regions.
    Type: Grant
    Filed: July 14, 2003
    Date of Patent: April 12, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventors: Yoshiaki Nakayoshi, Kazuhiko Yanagawa, Takahiro Ochiai, Hirotaka Imayama
  • Transflective liquid crystal display device
    Publication number: 20110025961
    Abstract: A transflective liquid crystal display device with improved display quality in which the liquid initial alignment direction of the liquid crystal layer is in a direction perpendicular to the extending direction of a clearance between the counter electrode of a transmission portion and a counter electrode of a reflection portion or in a direction within a range of ±2° in the clockwise direction perpendicular to the extending direction of the clearance in a case where the liquid crystal layer comprises positive type liquid crystals, or the liquid crystal initial alignment direction of the liquid crystal layer is in a direction parallel with the extending direction of a clearance, or a direction within a range of ±2° in the clockwise direction relative to the extending direction of the clearance in a case where the liquid crystal layer comprises negative type liquid crystals.
    Type: Application
    Filed: October 7, 2010
    Publication date: February 3, 2011
    Inventors: Takahiro Ochiai, Toshio Miyazawa, Masahiro Maki, Tohru Sasaki, Masateru Morimoto