Patents by Inventor Ryohki Itoh

Ryohki Itoh 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: 8207924
    Abstract: A display device improves brightness while minimizing an increase in the number of source drivers. When a value obtained by dividing the length of a display screen in a row direction by the number of pixels in the row direction is a length corresponding to one pixel in the row direction, one period of color arrangement in the row direction is a length corresponding to two pixels. One such period of color arrangement includes two groups of subpixels that include first subpixels of the light's three primary colors of red (R), green (G) and blue (B), that are arranged in a row and that have the same subpixel configuration; and at least one additional subpixel. Scanning lines extending in the row direction and signal lines extending in the column direction are connected to the first subpixels and the at least one additional subpixel.
    Type: Grant
    Filed: October 11, 2006
    Date of Patent: June 26, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Satoshi Horiuchi, Yuhko Hisada, Tomoo Furukawa, Ryohki Itoh, Takahura Yamada
  • Publication number: 20120133854
    Abstract: In an MVA liquid crystal display device of the present invention, in at least one electrode (21) of each pixel, a portion sandwiched between a first portion and a second portion adjacent to the first portion of the first electrode has an extended portion (21aE1, 21bE1, 21aE2, 21bE2) protruding in the row direction, the first portion being a portion in which an edge of the first electrode intersects with a slit (22a, 22b) or a portion in which the edge of the first electrode intersects with an extended line of a slit (22a, 22b) closest to the edge and the second portion being a portion in which the edge of the first electrode intersects with a second domain regulating structure (44a, 44b) or a portion in which the first electrode intersects with an extended line of a second domain regulating structure (44a, 44b) closest to the edge.
    Type: Application
    Filed: August 6, 2010
    Publication date: May 31, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Ryohki Itoh, Masahiro Yoshida, Takaharu Yamada, Yuhko Hisada, Satoshi Horiuchi
  • Publication number: 20120127408
    Abstract: In an MVA liquid crystal display device of the present invention, each pixel includes at least one electrode (21), the first electrode (21) has a first corner portion with a first edge parallel to a row direction and a second edge parallel to a column direction, and a first substrate further includes an electrode layer (e.g., a storage capacitor counter electrode (18a)) which overlaps at least part of the first edge and at least part of the second edge of the first corner portion. According to the present invention, it is possible to provide an MVA liquid crystal display device capable of suppressing the degradation in display quality caused by the disturbance in alignment of liquid crystal molecules in the vicinity of the edge of the first electrode.
    Type: Application
    Filed: August 6, 2010
    Publication date: May 24, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Ryohki Itoh, Masahiro Yoshida, Takaharu Yamada, Yuhko Hisada, Satoshi Horiuchi
  • Publication number: 20120105418
    Abstract: The present invention provides a liquid crystal display device with excellent display performance which has a high pixel aperture design and can avoid alignment disorder of liquid crystal molecules and improve image roughness. The liquid crystal display device of the present invention includes: a liquid crystal layer between a thin film transistor array substrate and an opposed substrate; and at least one electrode for applying a voltage to the liquid crystal layer. The thin film transistor array substrate includes: a transparent substrate; source lines and gate lines running in longitudinal and transverse directions, respectively, on a main surface of the transparent substrate; a conductive portion in a pixel defined by the source lines and the gate lines; and an insulating film covering the conductive part, and is provided with a contact hole electrically connecting an electrode on the thin film transistor array substrate among the at least one electrode and the conductive part through the insulating film.
    Type: Application
    Filed: March 3, 2010
    Publication date: May 3, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Ryohki Itoh, Takaharu Yamada, Yuhko Hisada, Satoshi Horiuchi
  • Publication number: 20120081626
    Abstract: The present invention provides a liquid-crystal display device in which a pixel defect does not occur even when an electrode becomes disconnected. The liquid-crystal display device according to the present invention comprises a liquid crystal layer and a pair of substrates between which the liquid crystal layer is interposed. At least one of the pair of substrates includes an electrode that applies a voltage to the liquid crystal layer. The electrode that applies the voltage to the liquid crystal layer includes two or more linear portions. The substrate comprising the electrode that applies the voltage to the liquid crystal layer, from among the pair of substrates, includes a floating electrode that overlaps at least two of the two or more linear portions via an insulating film.
    Type: Application
    Filed: March 11, 2010
    Publication date: April 5, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Ryohki Itoh, Takaharu Yamada, Yuhko Hisada, Satoshi Horiuchi
  • Patent number: 8125584
    Abstract: The present invention provides a liquid crystal display panel capable of providing a high contrast ratio with a storage capacitance being secured, and also provides a liquid crystal display device including such a panel. The present invention is a liquid crystal display panel having a structure in which a liquid crystal layer is interposed between a first substrate and a second substrate, wherein at least one of the first substrate and the second substrate includes a projection for liquid crystal alignment control, the first substrate includes a scanning signal line, a data signal line, a drain electrode electrically connected to a pixel electrode, a switching element, and a storage capacitor wiring, the storage capacitor wiring includes a main wiring part and a branch part, the branch part being connected to the main wiring part and overlapping with the projection for liquid crystal alignment control.
    Type: Grant
    Filed: September 4, 2007
    Date of Patent: February 28, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Satoshi Horiuchi, Toshiaki Fujihara, Masakatsu Tominaga, Hitoshi Matsumoto, Hironobu Sawada, Ryohki Itoh
  • Publication number: 20110273653
    Abstract: An array substrate of the present invention includes: an insulating substrate; a plurality of scanning lines on the insulating substrate; a plurality of data lines each disposed so as to intersect the plurality of scanning lines on the insulating substrate; picture element electrodes each formed in a substantially rectangular shape, the picture element electrodes each being connected, via a switching element, to a corresponding scanning line and a corresponding data line, the picture element electrodes each having a long side disposed along a direction in which the plurality of scanning lines are extended and a short side disposed along a direction in which the plurality of data lines are extended, the picture element electrodes each having cut sections formed by cutting two corners of each of the picture element electrodes, the cut sections being formed so as to serve as alignment dividing means.
    Type: Application
    Filed: October 8, 2009
    Publication date: November 10, 2011
    Inventors: Masahiro Yoshida, Satoshi Horiuchi, Takaharu Yamada, Yuhko Hisada, Ryohki Itoh
  • Publication number: 20110242073
    Abstract: A high-quality display is achieved by suppressing a disturbance in alignment in a liquid crystal display panel including a substrate structured so that a slit in a pixel electrode intersects with a scanning signal line or an auxiliary capacitor line. An active matrix substrate (10) includes: a pixel electrode (12) having a slit; and an auxiliary capacitor line (14). In a region of intersection between the slit (15) and the auxiliary capacitor line (14) or a scanning signal line (21), at least a drain line (13) or a data signal line (22) is provided between a layer of the pixel electrode (12) and a layer of the auxiliary capacitor line (14) or of the scanning signal line (21) in such a way as to cover the auxiliary capacitor line (12) or the scanning signal line (21).
    Type: Application
    Filed: August 7, 2009
    Publication date: October 6, 2011
    Inventors: Satoshi Horiuchi, Takaharu Yamada, Yuhko Hisada, Ryohki Itoh
  • Publication number: 20110122105
    Abstract: A display device includes: a plurality of display interconnects (3) provided so as to extend parallel to each other; a drive circuit (44aa) provided at one ends of the display interconnects (3), and connected to the display interconnects (3); a first interconnect (Wa) provided so as to cross the other ends of the display interconnects (3) in an insulating state; and a second interconnect (Wb) provided so as to cross the one ends of the display interconnects (3) in an insulating state, and so as to be connected to the first interconnect (Wa). When any of the display interconnects (3) is disconnected, a display signal from the drive circuit (44aa) is supplied to the other side of the disconnected display interconnect (3) sequentially through the second interconnect (Wb) and the first interconnect (Wa) in this order via an amplifier circuit (A).
    Type: Application
    Filed: July 9, 2009
    Publication date: May 26, 2011
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Ryohki Itoh, Takaharu Yamada, Isao Ogasawara, Takashi Okamoto
  • Publication number: 20110075087
    Abstract: Each of picture elements (14) has a plurality of alignment regions (R1, R2, R3, and R4), in each of which liquid crystal molecules contained in a liquid crystal layer are aligned in a direction that is different from those in the others of the plurality of alignment regions. Each of a plurality of scanning signal lines (32) and a border region (R11 and R12) between corresponding adjacent ones of the plurality of alignment regions (R1, R2, R3, and R4) at least partially overlap each other when viewed from above.
    Type: Application
    Filed: March 27, 2009
    Publication date: March 31, 2011
    Inventors: Junichi Morinaga, Katsushige Asada, Masahiro Yoshida, Tetsuya Fujikawa, Katsuhiro Mikumo, Kuniko Maeno, Ryohki Itoh, Satoshi Horiuchi, Tatsuji Saitoh, Isao Ogasawara, Kazunori Tanimoto, Katsuhiro Okada, Toshiaki Fujihara, Masakatsu Tominaga
  • Publication number: 20100296017
    Abstract: A liquid crystal display device in which lengths (d1 and d2) of respective picture element electrodes (60) in an extended direction of scanning signal lines (32) are longer than lengths (d3) of the respective picture element electrodes (60) in an extended direction of video signal lines (35) is arranged such that storage capacitor lines (36) are provided along the respective scanning signal lines (32) so as to overlap the respective picture element electrodes (60) via an insulating film (70) in plan view.
    Type: Application
    Filed: December 1, 2008
    Publication date: November 25, 2010
    Inventors: Masahiro Yoshida, Satoshi Horiuchi, Masakatsu Tominaga, Junichi Morinaga, Ryohki Itoh, Katsushige Asada, Hironobu Sawada, Hitoshi Matsumoto
  • Patent number: 7834946
    Abstract: A display device includes multiple signal lines that are connected to multiple pixel electrodes including first and second pixel electrodes. The distance between one end of the first pixel electrode and the centerline of a first signal line is greater than the distance between one end of the second pixel electrode and the centerline of a second signal line. Alternatively, the distance between the other end of the first pixel electrode and the centerline of an adjacent signal line, which is located on the opposite side of the first pixel electrode from the first signal line, is greater than the distance between the other end of the second pixel electrode and the centerline of another adjacent signal line, which is located on the opposite side of the second pixel electrode from the second signal line.
    Type: Grant
    Filed: March 20, 2007
    Date of Patent: November 16, 2010
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Satoshi Horiuchi, Yuhko Hisada, Ryohki Itoh, Takaharu Yamada
  • Publication number: 20100277447
    Abstract: The present invention provides a liquid crystal display device including an active matrix substrate with improved characteristics and providing high-contrast between black and white displays.
    Type: Application
    Filed: December 26, 2008
    Publication date: November 4, 2010
    Inventors: Ryohki Itoh, Satoshi Horiuchi, Takaharu Yamada
  • Publication number: 20100259702
    Abstract: An active matrix substrate (10) included in a liquid crystal display device of the present invention is arranged such that (i) source bus lines (12) (signal wires) are disposed so that each of the source bus lines (i) partially overlaps its corresponding pixel electrodes (14) adjacent to each other along a direction in which gate bus lines (11) (scanning wires) extend and (ii) leads from a border between the pixel electrodes (14) toward a central part of each of the pixel electrodes (14), and in the meantime, the source bus lines (12) are disposed so that at least part of overlap between each of the source bus lines (12) and the pixel electrodes (14) overlaps ribs (26) (orientation-changing sections) that change orientation of liquid crystal molecules contained in a liquid crystal layer.
    Type: Application
    Filed: September 9, 2008
    Publication date: October 14, 2010
    Inventors: Ryohki Itoh, Satoshi Horiuchi
  • Publication number: 20100188437
    Abstract: A display device prevents luminance unevenness that occurs in the case of inversion driving being performed, and performs high quality image display, while selectively scanning two lines of picture elements constituting a single pixel using a single gate wiring, as in the case of multi-primary color image display.
    Type: Application
    Filed: June 9, 2008
    Publication date: July 29, 2010
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Ryohki Itoh, Satoshi Horiuchi, Yuhko Hisada
  • Publication number: 20100033643
    Abstract: The present invention provides a liquid crystal display panel capable of providing a high contrast ratio with a storage capacitance being secured, and also provides a liquid crystal display device including such a panel. The present invention is a liquid crystal display panel having a structure in which a liquid crystal layer is interposed between a first substrate and a second substrate, wherein at least one of the first substrate and the second substrate includes a projection for liquid crystal alignment control, the first substrate includes a scanning signal line, a data signal line, a drain electrode electrically connected to a pixel electrode, a switching element, and a storage capacitor wiring, the storage capacitor wiring includes a main wiring part and a branch part, the branch part being connected to the main wiring part and overlapping with the projection for liquid crystal alignment control.
    Type: Application
    Filed: September 4, 2007
    Publication date: February 11, 2010
    Inventors: Satoshi Horiuchi, Toshiaki Fujihara, Masakatsu Tominaga, Hitoshi Matsumoto, Hironobu Sawada, Ryohki Itoh
  • Publication number: 20090290080
    Abstract: A display device includes multiple signal lines that are connected to multiple pixel electrodes including first and second pixel electrodes. The distance between one end of the first pixel electrode and the centerline of a first signal line is greater than the distance between one end of the second pixel electrode and the centerline of a second signal line. Alternatively, the distance between the other end of the first pixel electrode and the centerline of an adjacent signal line, which is located on the opposite side of the first pixel electrode from the first signal line, is greater than the distance between the other end of the second pixel electrode and the centerline of another adjacent signal line, which is located on the opposite side of the second pixel electrode from the second signal line.
    Type: Application
    Filed: March 20, 2007
    Publication date: November 26, 2009
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Satoshi Horiuchi, Yuhko Hisada, Ryohki Itoh, Takaharu Yamada
  • Publication number: 20090051638
    Abstract: A display device improves brightness while minimizing an increase in the number of source drivers. When a value obtained by dividing the length of a display screen in a row direction by the number of pixels in the row direction is a length corresponding to one pixel in the row direction, one period of color arrangement in the row direction is a length corresponding to two pixels. One such period of color arrangement include two groups of subpixels that include first subpixel of the light's three primary colors of red (R), green (G) and blue (B), that are arranged in a row and that have the same subpixel configuration; and at least one additional subpixel. Scanning lines extending in the row direction and signal lines extending in the column direction are connected to the first subpixels and the at least one additional subpixel.
    Type: Application
    Filed: October 11, 2006
    Publication date: February 26, 2009
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Satoshi Horiuchi, Yuhko Hisada, Tomoo Furukawa, Ryohki Itoh, Takahara Yamada
  • Publication number: 20090040243
    Abstract: In one embodiment of the present invention, in an even-numbered signal line group, the arrangement sequence of the first and second signal lines is reversed between in a display area and in a non-display area, and the same goes for the arrangement sequence of the third and fourth signal lines. The ends of the first to sixteenth signal lines in the non-display area are connected to the first to sixteenth individual drivers, respectively. An odd-numbered individual driver and an even-numbered individual driver each output a corresponding one of drive signals of opposite polarity. Thus, the polarities of subpixels of the same color arranged in a first direction D1 (horizontal direction) differ between the subpixels connected to the odd-numbered signal line group and the subpixels connected to the even-numbered signal line group. That is, all of the subpixels having the same color arranged in the horizontal direction do not have the same polarity. This helps reduce a horizontal shadow.
    Type: Application
    Filed: June 28, 2006
    Publication date: February 12, 2009
    Inventors: Yuhko Hisada, Ryohki Itoh, Takaharu Yamada, Hideki Morii, Takayuki Mizunaga