Patents by Inventor Junichi Ohwada

Junichi Ohwada 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: 7359024
    Abstract: A liquid crystal display device includes first and second substrates with a liquid crystal layer therebetween, and a transparent conductor which is formed at a liquid crystal side of at least one of the first and the second substrates. At least a projected portion is formed on the transparent conductor in a pixel region, and a material of the projected portion is different from a material of the transparent conductor.
    Type: Grant
    Filed: February 9, 2005
    Date of Patent: April 15, 2008
    Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.
    Inventors: Masumi Sasuga, Junichi Ohwada, Akira Kobayashi, Masaru Fujita, Hiroshi Nakamoto, Ryu Ono, Tsutomu Isono
  • Publication number: 20080062348
    Abstract: A liquid crystal display device includes a metal case having a display window, a frame member made of synthetic resin, a liquid crystal display panel disposed between the metal case and the frame member, an integrated circuit chip driving the liquid crystal display panel, and disposed between the metal case and the frame member, a first print circuit board, and a second print circuit board electrically connected to the first print circuit board, and a flexible wiring substrate connected to the liquid crystal display panel and the first print circuit board. The first print circuit board includes at least one ground pad which is connected to the metal case, and the second print circuit board includes a power supply circuit and a connector connected to an external member of the liquid crystal display device, and supplies power to the first print circuit board via a flat cable.
    Type: Application
    Filed: October 29, 2007
    Publication date: March 13, 2008
    Inventors: Masumi SASUGA, Junichi OHWADA, Akira KOBAYASHI, Masaru FUJITA, Hiroshi NAKAMOTO, Ryu ONO, Tsutomu ISONO
  • Patent number: 7262822
    Abstract: A liquid crystal display device which includes a liquid crystal display panel, a metal shield casing covering a periphery of the liquid crystal display panel, a plurality of fluorescent lamps arranged below the liquid crystal panel, a back light support supporting the plurality of fluorescent lamps, and a lower casing fixed to the metal shield casing. The back light support is fixed in the lower casing and comprises a plurality of slits, wherein one end of the plurality of fluorescent lamps is disposed with respect to a respective one of the plurality of slits.
    Type: Grant
    Filed: October 12, 2005
    Date of Patent: August 28, 2007
    Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.
    Inventors: Masumi Sasuga, Junichi Ohwada, Akira Kobayashi, Masaru Fujita, Hiroshi Nakamoto, Ryu Ono, Tsutomu Isono
  • Publication number: 20060033872
    Abstract: A liquid crystal display device which includes a liquid crystal display panel, a metal shield casing covering a periphery of the liquid crystal display panel, a plurality of fluorescent lamps arranged below the liquid crystal panel, a back light support supporting the plurality of fluorescent lamps, and a lower casing fixed to the metal shield casing. The back light support is fixed in the lower casing and comprises a plurality of slits, wherein one end of the plurality of fluorescent lamps is disposed with respect to a respective one of the plurality of slits.
    Type: Application
    Filed: October 12, 2005
    Publication date: February 16, 2006
    Inventors: Masumi Sasuga, Junichi Ohwada, Akira Kobayashi, Masaru Fujita, Hiroshi Nakamoto, Ryu Ono, Tsutomu Isono
  • Publication number: 20050157241
    Abstract: A liquid crystal display device includes first and second substrates with a liquid crystal layer therebetween, and a transparent conductor which is formed at a liquid crystal side of at least one of the first and the second substrates. At least a projected portion is formed on the transparent conductor in a pixel region, and a material of the projected portion is different from a material of the transparent conductor.
    Type: Application
    Filed: February 9, 2005
    Publication date: July 21, 2005
    Inventors: Masumi Sasuga, Junichi Ohwada, Akira Kobayashi, Masaru Fujita, Hiroshi Nakamoto, Ryu Ono, Tsutomu Isono
  • Patent number: 6862068
    Abstract: A liquid crystal display device includes a first substrate. A second substrate is facing the first substrate. A liquid crystal layer is interposed between the first and second substrates. At least one pixel area is defined by a plurality of gate lines and a plurality of drain lines arranged in a matrix over the first substrate, wherein the plurality of gate lines are extending in a first direction, and the plurality of drain lines are extending in a second direction. A first electrode is assigned to the pixel area, wherein the first electrode is provided over the first substrate. A second electrode is assigned to the pixel area and is facing the first electrode, wherein the second electrode is provided over the first substrate and is transparent. The second electrode has a solid portion and a hollow portion. The hollow portion is superposed to at least a portion of the first electrode. An insulating layer is provided between the first and second electrodes.
    Type: Grant
    Filed: September 15, 2003
    Date of Patent: March 1, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Masuyuki Ohta, Junichi Ohwada, Nobutake Konishi, Masayuki Hikiba
  • Patent number: 6856362
    Abstract: A liquid crystal display device includes a liquid crystal display panel and a metal shield casing which covers a periphery of the liquid crystal display panel. The metal shield casing has a plurality of fixing pawls and a plurality of fixing hooks.
    Type: Grant
    Filed: August 15, 2002
    Date of Patent: February 15, 2005
    Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.
    Inventors: Masumi Sasuga, Junichi Ohwada, Akira Kobayashi, Masaru Fujita, Hiroshi Nakamoto, Ryu Ono, Tsutomu Isono
  • Publication number: 20040189923
    Abstract: A liquid crystal display device having a pair of substrates and a liquid crystal layer interposed between the pair of substrates. One of the pair of substrates includes a plurality of scanning electrodes, a plurality of signal electrodes, a plurality of thin film transistors arranged in the vicinity of crossing points of the scanning electrodes and the signal electrodes, a plurality of common electrodes, and a plurality of pixel electrodes arranged between each of the common electrodes. The other of the pair of substrates has color filters, an insulating film for flattening the color filters directly arranged on the color filters, and an orientation control film arranged on the insulating film.
    Type: Application
    Filed: April 7, 2004
    Publication date: September 30, 2004
    Inventors: Katsumi Kondo, Hiromu Terao, Hidetoshi Abe, Masuyuki Ohta, Kenichi Suzuki, Tohru Sasaki, Genshiro Kawachi, Junichi Ohwada
  • Patent number: 6724455
    Abstract: A liquid crystal display device having a pair of substrates with a liquid crystal layer interposed between the pair of substrates. One of the pair of substrates includes a plurality of scanning electrodes, a plurality of signal electrodes arranged so as to cross the plurality of scanning electrodes, a plurality of thin film transistors arranged in the vicinity of crossing points of the scanning electrodes and the signal electrodes, a plurality of common electrodes, and a plurality of pixel electrodes arranged between each of the common electrodes. An electric field is formed in the liquid crystal layer by applying a voltage to the pixel electrodes and the plurality of common electrodes. The other substrate of the pair of substrates includes color filters, an insulating film for flattening the color filters arranged on the color filters, and an orientation control film arranged on the insulating film.
    Type: Grant
    Filed: January 17, 2002
    Date of Patent: April 20, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Katsumi Kondo, Hiromu Terao, Hidetoshi Abe, Masuyuki Ohta, Kenkichi Suzuki, Tohru Sasaki, Genshiro Kawachi, Junichi Ohwada
  • Publication number: 20040061824
    Abstract: A liquid crystal display device includes a first substrate. A second substrate is facing the first substrate. A liquid crystal layer is interposed between the first and second substrates. At least one pixel area is defined by a plurality of gate lines and a plurality of drain lines arranged in a matrix over the first substrate, wherein the plurality of gate lines are extending in a first direction, and the plurality of drain lines are extending in a second direction. A first electrode is assigned to the pixel area, wherein the first electrode is provided over the first substrate. A second electrode is assigned to the pixel area and is facing the first electrode, wherein the second electrode is provided over the first substrate and is transparent. The second electrode has a solid portion and a hollow portion. The hollow portion is superposed to at least a portion of the first electrode. An insulating layer is provided between the first and second electrodes.
    Type: Application
    Filed: September 15, 2003
    Publication date: April 1, 2004
    Applicant: HITACHI, LTD.
    Inventors: Masuyuki Ohta, Junichi Ohwada, Nobutake Konishi, Masayuki Hikiba
  • Patent number: 6650388
    Abstract: A liquid crystal display device includes a first substrate. A second substrate is facing the first substrate. A liquid crystal layer is interposed between the first and second substrates. At least one pixel area is defined by a plurality of gate lines and a plurality of drain lines arranged in a matrix over the first substrate, wherein the plurality of gate lines are extending in a first direction, and the plurality of drain lines are extending in a second direction. A first electrode is assigned to the pixel area, wherein the first electrode is provided over the first substrate. A second electrode is assigned to the pixel area and is facing the first electrode, wherein the second electrode is provided over the first substrate and is transparent. The second electrode has a solid portion and a hollow portion. The hollow portion is superposed to at least a portion of the first electrode. An insulating layer is provided between the first and second electrodes.
    Type: Grant
    Filed: January 11, 2001
    Date of Patent: November 18, 2003
    Assignee: Hitachi, Ltd.
    Inventors: Masuyuki Ohta, Junichi Ohwada, Nobutake Konishi, Masayuki Hikiba
  • Publication number: 20020191126
    Abstract: A liquid crystal display device includes a liquid crystal display panel and a metal shield casing which covers a periphery of the liquid crystal display panel. The metal shield casing has a plurality of fixing pawls and a plurality of fixing hooks.
    Type: Application
    Filed: August 15, 2002
    Publication date: December 19, 2002
    Inventors: Masumi Sasuga, Junichi Ohwada, Akira Kobayashi, Masaru Fujita, Hiroshi Nakamoto, Ryu Ono, Tsutomu Isono
  • Patent number: 6466282
    Abstract: A liquid crystal display device including a liquid crystal display panel, a first driver circuit substrate, a second driver unit substrate and a flexible connector. The first driver circuit substrate provides electrical connection for at least one driver chip for the liquid crystal display panel with the first driver circuit being disposed at a peripheral portion of the liquid crystal display panel. The second driver circuit substrate has at least a connector to be connected with an external circuit with the second driver circuit substrate being disposed in superposed relation to at least a portion of the first driver circuit substrate. The flexible connector electrically connects at least a part of the first driver circuit substrate to at least a part of the second driver substrate.
    Type: Grant
    Filed: January 18, 2001
    Date of Patent: October 15, 2002
    Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.
    Inventors: Masumi Sasuga, Junichi Ohwada, Akira Kobayashi, Masaru Fujita, Hiroshi Nakamoto, Ryu Ono, Tsutomu Isono
  • Patent number: 6407792
    Abstract: A liquid crystal display device includes a first substrate and a second substrate facing the first substrate. A liquid crystal layer is provided between the first and second substrates. First and second gate lines are extending in a first direction, and first and second drain lines are extending in a second direction. A pixel area is defined by the gate lines and drain lines. A counter electrode assigned to the pixel area and having a hollow portion is provided adjacent to a solid portion. The hollow and solid portions are extending in the second direction. One hollow portion is provided after N number of the solid portions, the N being a number equal to or greater than 3. A pixel electrode is assigned to the pixel area and is opposing the counter electrode. The pixel electrode has a connecting portion extending in the first direction and first and second extending portions extending in the second direction.
    Type: Grant
    Filed: March 30, 2001
    Date of Patent: June 18, 2002
    Assignee: Hitachi, Ltd.
    Inventors: Masuyuki Ohta, Junichi Ohwada, Nobutake Konishi, Masayuki Hikiba
  • Publication number: 20020063822
    Abstract: A liquid crystal display device having a pair of substrates with a liquid crystal layer interposed between the pair of substrates. One of the pair of substrates includes a plurality of scanning electrodes, a plurality of signal electrodes arranged so as to cross the plurality of scanning electrodes, a plurality of thin film transistors arranged in the vicinity of crossing points of the scanning electrodes and the signal electrodes, a plurality of common electrodes, and a plurality of pixel electrodes arranged between each of the common electrodes. An electric field is formed in the liquid crystal layer by applying a voltage to the pixel electrodes and the plurality of common electrodes. The other substrate of the pair of substrates includes color filters, an insulating film for flattening the color filters arranged on the color filters, and an orientation control film arranged on the insulating film.
    Type: Application
    Filed: January 17, 2002
    Publication date: May 30, 2002
    Inventors: Katsumi Kondo, Hiromu Terao, Hidetoshi Abe, Masuyuki Ohta, Kenkichi Suzuki, Tohru Sasaki, Genshiro Kawachi, Junichi Ohwada
  • Patent number: 6341004
    Abstract: A liquid crystal display device including a pair of substrates, a liquid crystal layer interposed between the pair of substrates, a plurality of first common electrodes extending in a direction and being formed on one substrate of the pair of substrates, and a second common electrode connected to one of the first common electrodes. The second common electrode has a first edge adjacent the one of the first common electrodes and a second edge opposite to the one of the first common electrode. A first pixel electrode is formed between two of the first common electrodes and extends in the same direction as the first common electrodes. A second pixel electrode overlaps the second common electrode, is connected to the first pixel electrode, and covers at least a portion of the first edge of the second common electrode.
    Type: Grant
    Filed: April 5, 2000
    Date of Patent: January 22, 2002
    Assignee: Hitachi, Ltd.
    Inventors: Katsumi Kondo, Hiromu Terao, Hidetoshi Abe, Masuyuki Ohta, Kenkichi Suzuki, Tohru Sasaki, Genshiro Kawachi, Junichi Ohwada
  • Publication number: 20010012087
    Abstract: A liquid crystal display device including a liquid crystal display panel, a first driver circuit substrate, a second driver unit substrate and a flexible connector. The first driver circuit substrate provides electrical connection for at least one driver chip for the liquid crystal display panel with the first driver circuit being disposed at a peripheral portion of the liquid crystal display panel. The second driver circuit substrate has at least a connector to be connected with an external circuit with the second driver circuit substrate being disposed in superposed relation to at least a portion of the first driver circuit substrate. The flexible connector electrically connects at least a part of the first driver circuit substrate to at least a part of the second driver substrate.
    Type: Application
    Filed: January 18, 2001
    Publication date: August 9, 2001
    Inventors: Masumi Sasuga, Junichi Ohwada, Akira Kobayashi, Masaru Fujita, Hiroshi Nakamoto, Ryu Ono, Tsutomu Isono
  • Publication number: 20010012086
    Abstract: A liquid crystal display device includes a first substrate and a second substrate facing the first substrate. A liquid crystal layer is provided between the first and second substrates. First and second gate lines are extending in a first direction, and first and second drain lines are extending in a second direction. A pixel area is defined by the gate lines and drain lines. A counter electrode assigned to the pixel area and having a hollow portion is provided adjacent to a solid portion. The hollow and solid portions are extending in the second direction. One hollow portion is provided after N number of the solid portions, the N being a number equal to or greater than 3. A pixel electrode is assigned to the pixel area and is opposing the counter electrode. The pixel electrode has a connecting portion extending in the first direction and first and second extending portions extending in the second direction.
    Type: Application
    Filed: March 30, 2001
    Publication date: August 9, 2001
    Inventors: Masuyuki Ohta, Junichi Ohwada, Nobutake Konishi, Masayuki Hikiba
  • Publication number: 20010007490
    Abstract: A liquid crystal display device includes a first substrate. A second substrate is facing the first substrate. A liquid crystal layer is interposed between the first and second substrates. At least one pixel area is defined by a plurality of gate lines and a plurality of drain lines arranged in a matrix over the first substrate, wherein the plurality of gate lines are extending in a first direction, and the plurality of drain lines are extending in a second direction. A first electrode is assigned to the pixel area, wherein the first electrode is provided over the first substrate. A second electrode is assigned to the pixel area and is facing the first electrode, wherein the second electrode is provided over the first substrate and is transparent. The second electrode has a solid portion and a hollow portion. The hollow portion is superposed to at least a portion of the first electrode. An insulating layer is provided between the first and second electrodes.
    Type: Application
    Filed: January 11, 2001
    Publication date: July 12, 2001
    Applicant: HITACHI LTD.
    Inventors: Masuyuki Ohta, Junichi Ohwada, Nobutake Konishi, Masayuki Hikiba
  • Patent number: 6195148
    Abstract: A liquid crystal display device including a liquid crystal display panel, a first driver circuit substrate, a second driver unit substrate and a flexible connector. The first driver circuit substrate provides electrical connection for at least one driver chip for the liquid crystal display panel with the first driver circuit being disposed at a peripheral portion of the liquid crystal display panel. The second driver circuit substrate has at least a connector to be connected with an external circuit with the second driver circuit substrate being disposed in superposed relation to at least a portion of the first driver circuit substrate. The flexible connector electrically connects at least a part of the first driver circuit substrate to at least a part of the second driver substrate.
    Type: Grant
    Filed: November 2, 1998
    Date of Patent: February 27, 2001
    Assignee: Hitachi, Ltd.
    Inventors: Masumi Sasuga, Junichi Ohwada, Akira Kobayashi, Masaru Fujita, Hiroshi Nakamoto, Ryu Ono, Tsutomu Isono