Patents by Inventor Toshihide Tsubata

Toshihide Tsubata 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: 20120281168
    Abstract: Each picture element includes first and second sub-picture elements, each of which includes a liquid crystal capacitor and at least one storage capacitor. After a display voltage representing a certain grayscale level has been applied to the respective sub-picture element electrodes of the first and second sub-picture elements, a voltage difference ?V? is produced between voltages to be applied to the respective liquid crystal capacitors of the first and second sub-picture elements by way of their associated storage capacitor(s). By setting the voltage difference ?V? value of the blue and/or cyan picture element(s) to be smaller than that of the other color picture elements, shift toward the yellow range at an oblique viewing angle can be minimized.
    Type: Application
    Filed: July 17, 2012
    Publication date: November 8, 2012
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Fumikazu SHIMOSHIKIRYOH, Kentaroh IRIE, Masanori TAKEUCHI, Nobuyoshi NAGASHIMA, Toshihide TSUBATA
  • Patent number: 8304769
    Abstract: An active matrix substrate of the present invention is arranged so that each pixel area has a transistor and a capacity electrode which is able to function as an electrode of a capacity. The active matrix substrate includes a conductor which is provided in a layer below the capacity electrode and is able to function as the other electrode of the capacity. The gate electrode of each transistor and a gate insulating film covering the conductor have a thin section with reduced thickness, in an on-conductor area overlapping the conductor. At least a part of the thin section overlaps the capacity electrode. In this way, the active matrix substrate which can reduce inconsistency in capacitance values of capacities (e.g. a storage capacitor, a capacity for controlling an electric potential of a pixel electrode, and a capacity which can function as both of them) provided in the substrate.
    Type: Grant
    Filed: December 5, 2006
    Date of Patent: November 6, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Toshihide Tsubata, Masanori Takeuchi
  • Patent number: 8289251
    Abstract: In one embodiment of the present invention, in a liquid crystal display apparatus, while the complication of a driver circuit, etc., and an increase in operating frequency are suppressed, impulse display is implemented and the charge characteristics of pixel capacitances are improved. In an active matrix-type liquid crystal display apparatus of at least one embodiment, during a precharge period provided for each horizontal period, a precharge voltage or of the same polarity as that of a data signal provided during an effective scanning period immediately after the precharge period is provided to a source line.
    Type: Grant
    Filed: April 24, 2007
    Date of Patent: October 16, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Toshihide Tsubata
  • Patent number: 8284355
    Abstract: The present invention has an object to provide an active matrix substrate, a liquid crystal display panel, a liquid crystal display element, a liquid crystal display device, and a substrate for liquid crystal display panel, each capable of suppressing generation of uneven cell gap without increase in a parasitic capacitance of a wiring. The active matrix substrate of the present invention is an active matrix substrate including a spacer on a substrate, wherein the spacer includes a base layer and a covering layer, the base layer being buried in the covering layer.
    Type: Grant
    Filed: October 12, 2007
    Date of Patent: October 9, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Tsuyoshi Tokuda, Hiroto Akiyama, Akihiro Shoraku, Toshihide Tsubata, Yukio Kurozumi
  • Publication number: 20120249610
    Abstract: In the present display device with each pixel being composed of subpixels of four or more colors, a backlight data processing portion sets a backlight source luminance to be high enough to compensate for a display luminance reduction caused by a maximum luminance adjustment portion (332) multiplying input pixel data for G by an adjustment gain, such that the value of the input pixel data for G does not exceed the maximum pixel value, after a G correction portion (331) corrects the input pixel data for G to compensate for a display luminance reduction due to the area of (subpixel) G being half of others. Thus, it is possible to realize high color reproducibility and a high luminance as realized by conventional liquid crystal display devices with a three-color, RGB, pixel configuration.
    Type: Application
    Filed: May 19, 2010
    Publication date: October 4, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Masayuki Katagami, Atsushi Ban, Toshihide Tsubata, Takehisa Yoshida
  • Publication number: 20120236226
    Abstract: A liquid crystal display uses a pixel division method by which the size of a defect can be reduced much more than conventionally possible, and a defect correcting method for the liquid crystal display. The liquid crystal display is provided with an active matrix array substrate including a plurality of gate lines and a plurality of source lines arranged on a transparent substrate to intersect with each other, and a plurality of pixel electrodes arranged in a matrix, each pixel electrode including an assembly of a plurality of sub-pixel electrodes, separate TFTs respectively connected to the sub-pixel electrodes in the vicinity of an intersection portion of the gate line and the source line, the TFTs being driven by the common gate line and the common source line, and at least one opening portion being formed in a lower-layer side line placed in a lower layer at the intersection portion.
    Type: Application
    Filed: September 12, 2011
    Publication date: September 20, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Tomoki NODA, Toshihide TSUBATA, Masanori TAKEUCHI, Kenji ENDA
  • Patent number: 8259046
    Abstract: In at least one embodiment of the present invention, deterioration of display quality is prevented from occurring in a display device provided with an active matrix substrate even when a larger size or a higher resolution is employed and a drive frequency is increased. In an active matrix substrate of a liquid crystal display device, a charge sharing control signal line is disposed so as to be arranged along each gate line and charge sharing TFTs are provided for each source line in numbers equal to the number of the gate lines. The gate terminal of the charge sharing TFT is connected to the charge sharing control signal line and the source and drain terminals are connected with neighboring source lines via connection electrode portions, respectively. Each of the charge sharing control signal lines is provided with a signal which turns on the charge sharing TFT for a predetermined period of every one horizontal period.
    Type: Grant
    Filed: March 22, 2007
    Date of Patent: September 4, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Toshihide Tsubata
  • Publication number: 20120218248
    Abstract: The liquid crystal display device (100) of this invention has pixels arranged in columns and rows to form a matrix pattern, and includes an active-matrix substrate (10), a counter substrate (20), a liquid crystal layer (30) and a signal line driver (3). The pixels include m kinds of (where m is an even number and m?4) pixels that display different colors and that are repeatedly arranged in the same order in the row direction. Grayscale voltages of the same polarity are supplied to two of the signal lines (13) of the active-matrix substrate (10), which are adjacent with one of the m kinds of pixels interposed between them. The active-matrix substrate (10) further includes an additional signal line (13D), which is arranged between the two signal lines (13) to run in the column direction and which is supplied with a grayscale voltage, of which the polarity is opposite to the grayscale voltages supplied to the two signal lines (13).
    Type: Application
    Filed: November 4, 2010
    Publication date: August 30, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Toshihide Tsubata
  • Patent number: 8253917
    Abstract: A substrate for a liquid crystal display panel includes a first projection structure and a second projection structure and/or a depression structure, the substrate for the liquid crystal display panel includes a specific structure at a part of or near the first projection structure, the specific structure having at least one of a planar shape different from a planar shape of the second projection structure and/or the depression structure and a planar area of ? times or less or 1.5 times or more than a planar area of the second projection structure and/or the depression structure.
    Type: Grant
    Filed: February 9, 2011
    Date of Patent: August 28, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kohji Matsuoka, Shinichi Hirato, Akihiro Shoraku, Kenji Enda, Tsuyoshi Tokuda, Toshihide Tsubata
  • Patent number: 8253903
    Abstract: A first sub-pixel area and a second sub-pixel area that are provided in each of pixel areas so as to sandwich a scanning signal line 2. A first sub-pixel is arranged to include the first sub-pixel area and a section of the counter substrate which section corresponds to the first sub-pixel, area and the second sub-pixel is arranged to include the second sub-pixel area and a section of the counter substrate which section corresponds to the second sub-pixel area. A first alignment control structure is provided in the first sub-pixel and a second alignment control structure is provided in the second sub-pixel. The first alignment control structure (L1 and S1 to S4) provided in one pixel (55x) of two adjacent pixels has a shape obtained by rotating by 180° the first alignment control structure (L11, S11 to S14) provided in the other one pixel (55y) of the two adjacent pixels.
    Type: Grant
    Filed: September 26, 2007
    Date of Patent: August 28, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kentaroh Irie, Toshihide Tsubata, Naoshi Yamada
  • Publication number: 20120206659
    Abstract: The present active matrix substrate is arranged such that each pixel region includes two pixel electrodes (17a and 17b), each data signal line extends in a column direction, each column of pixel regions is associated with two data signal lines (Sx and Sy), one pixel electrode (17a) of the pixel region included in the column of pixel regions is connected to one (Sx) of the two data signal lines via a transistor (12a) that is connected to a scanning signal line (Gn), the other pixel electrode (17b) of the pixel region is connected to the other one (Sy) of the two data signal lines via a transistor (12b) that is connected to another scanning signal line (Gn?1), and one (17a) of pixel electrodes included in one of two adjacent pixel regions of the column and one (17d) of pixel electrodes included in the other one of the two adjacent pixel regions of the column are connected to an identical scanning signal line (Gn) via respective transistors (12a and 12d).
    Type: Application
    Filed: August 6, 2010
    Publication date: August 16, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Toshihide Tsubata
  • Publication number: 20120200481
    Abstract: The present invention relates to a capacitively-coupled pixel-division liquid crystal display device.
    Type: Application
    Filed: August 11, 2010
    Publication date: August 9, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Toshihide Tsubata
  • Publication number: 20120200615
    Abstract: The liquid crystal display device (100) of this invention has pixels arranged in columns and rows to form a matrix pattern, and includes an active-matrix substrate (10), a counter substrate (20), a liquid crystal layer (30), a scan line driver (2) and a signal line driver (3). The pixels include m kinds of (where m is an even number and m?4) pixels that display different colors. The signal lines (13) of the active-matrix substrate (10) include pairs of signal lines (13), each pair of which is provided for an associated column of pixels and which are first and second signal lines (13a, 13b) to which grayscale voltages of opposite polarities are supplied from the signal line driver (3). In two pixels that are adjacent in the column direction, the switching element (14) of one of the two pixels is connected to the first signal line (13a) and the switching element (14) of the other pixel is connected to the second signal line (13b).
    Type: Application
    Filed: October 20, 2010
    Publication date: August 9, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Toshihide Tsubata
  • Patent number: 8228283
    Abstract: In one embodiment of the present invention, a liquid crystal panel driving apparatus is disclosed which sequentially receives pieces of video data for one data signal line, (i) prepares a data string by sorting, in order of outputting, a plurality of pieces of video data inputted in a predetermined period while adding a piece of dummy data to a predetermined position, (ii) assigns one horizontal scanning period to an output of a piece of video data while assigning a dummy scanning period to an output of a piece of dummy data, and (iii) sets one horizontal scanning period shorter than an interval of inputting of pieces of video data. This makes it possible to suppress an increase in vertical display period even though a piece of dummy data is added to inputted video data while a dummy scanning period is assigned thereto.
    Type: Grant
    Filed: April 9, 2008
    Date of Patent: July 24, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Masae Kitayama, Fumikazu Shimoshikiryoh, Kentaro Irie, Toshihide Tsubata, Naoshi Yamada
  • Patent number: 8228273
    Abstract: One embodiment of the present invention is to prevent deterioration of display quality from occurring in a display device provided with an active matrix substrate even when a larger size or a higher resolution is employed and a drive frequency is increased. In an active matrix substrate of a liquid crystal display device, a discharge control signal line is disposed so as to be arranged along each gate line and discharge TFTs are provided for each source line in numbers equal to the number of the gate lines. The gate terminal, source terminal, and drain terminal of the discharge TFT are connected to the discharge control signal line, the storage capacitance line, and its adjacent source line, respectively. Each storage capacitance line is provided with the common potential Vcom. Each discharge control signal line is provided with a signal which turns on the discharge TFT for a predetermined period of every one horizontal period.
    Type: Grant
    Filed: March 27, 2007
    Date of Patent: July 24, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Toshihide Tsubata
  • Publication number: 20120169977
    Abstract: The present invention provides a color filter substrate for preventing an electrical short circuit between an electrode and other members at a place upper than the colored transparent layers disposed in a stack, and further preventing electrical disconnection on colored transparent layers other than the colored transparent layers in a stack, in the case where colored transparent layers are disposed in a stack and an electrode is stacked over the entire surface.
    Type: Application
    Filed: May 26, 2010
    Publication date: July 5, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Toshihide Tsubata
  • Publication number: 20120133860
    Abstract: An active matrix substrate is provided with a lead wire led out from a switching element to a surrounding region; a pad portion formed in the lead wire, and positioned in surrounding region; an insulation layer formed so as to cover pad portion, including a passivation film formed of an inorganic material, and a planarization film positioned on passivation film and formed of an organic material, and having a contact hole formed so as to reach pad; and an ITO film positioned in contact hole, and formed on pad. ITO film is formed so as to be spaced from a part defined by planarization film in an inner periphery surface of contact hole.
    Type: Application
    Filed: June 11, 2010
    Publication date: May 31, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Toshihide Tsubata, Kohichi Yamashiki, Mitsuhiro Sugimoto, Yasuhiro Nakatake
  • Publication number: 20120127396
    Abstract: An active matrix substrate is provided with a lead wire led from a switching element to a surrounding region; a pad portion formed in the lead wire and positioned in surrounding region; an insulation film including a planarization film positioned uppermost, and a passivation film and a gate insulation film positioned under planarization film, formed so as to cover the pad portion, and having a contact hole formed so as to reach pad portion; and an ITO film positioned in contact hole, and formed on pad portion.
    Type: Application
    Filed: June 11, 2010
    Publication date: May 24, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Toshihide Tsubata, Kohichi Yamashiki, Mitsuhiro Sugimoto, Yasuhiro Nakatake
  • Patent number: 8184221
    Abstract: The present invention provides a liquid crystal display panel which can reduce the transmittance and further improve the response speed.
    Type: Grant
    Filed: October 3, 2007
    Date of Patent: May 22, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yuhichi Inoue, Mitsuaki Hirata, Naoshi Yamada, Toshihide Tsubata
  • Patent number: 8184223
    Abstract: A first pixel electrode (17a), a second pixel electrode (17b), a third pixel electrode (17c), and a fourth pixel electrode (17d) are provided in a pixel (100); the first pixel electrode (17a) is connected to a data signal line (15x) via a first transistor (12a), the second pixel electrode (17b) is connected to the data signal line (15x) via a second transistor (12b), and the first transistor (12a) and the second transistor (12b) are connected to the same scanning signal line (16x); the first pixel electrode (17a) is connected to the third pixel electrode (17c) via a capacitor, and the second pixel electrode (17b) is connected to the fourth pixel electrode (17d) via a capacitor; one of two storage capacitor wires (18p, 18q) forms a capacitance with the first pixel electrode (17a), and the other one of the two storage capacitor wires (18p, 18q) forms a capacitance with the second pixel electrode (17b); and one of the two storage capacitor wires (18p, 18q) receives a storage capacitor wire signal, and the other
    Type: Grant
    Filed: December 26, 2008
    Date of Patent: May 22, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Toshihide Tsubata