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).

  • Patent number: 8450738
    Abstract: An active matrix substrate includes: pixel regions (5L, 5R, and 5M) provided in line and column direction; scan signal lines (16? and 16?); data signal lines (Sp, Sq, sp, and sq) crossing the scan signal lines at right angles; a gate insulating film covering the scan signal lines; and an interlayer insulating film covering the data signal lines, two of the data signal lines (Sq and sp) being provided (i) so as to overlap a gap between two of the pixel regions (5L and 5R) which are adjacent to each other in the line direction or (ii) so as to overlap a region which extends along the gap, the interlayer insulating film having a hollow part K so that the hollow part K and a gap between the two of the data signal lines (Sq and sp) overlap each other, and part of the hollow part K and the scan signal lines (16? and 16?) overlap each other via the gate insulating film.
    Type: Grant
    Filed: August 27, 2008
    Date of Patent: May 28, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Toshihide Tsubata, Toshinori Sugihara
  • Patent number: 8451201
    Abstract: The method of driving a liquid crystal display in accordance with one embodiment of the present invention is a method of driving a liquid crystal display whereby a first liquid crystal panels produces a display from a first display signal and the second liquid crystal panel produces a display a second display signal derived from the first display signal, the first and second liquid crystal panels being stacked on top of each other. The luminance of the first liquid crystal panel is extended based on the luminance extension ratio obtained from the gray levels for dots contained in the first display signal and a logical maximum gray level of input image data. The luminance of the second liquid crystal panel which produces a display from the second display signal is lowered by the amount by which luminance is extended on the first liquid crystal panel.
    Type: Grant
    Filed: September 28, 2006
    Date of Patent: May 28, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Mitsuaki Hirata, Masayuki Katakami, Toshihide Tsubata, Makoto Shiomi, Shigeaki Mizushima
  • Patent number: 8441590
    Abstract: Disclosed is an active matrix including: a second capacitor electrode (37) electrically connected to a first pixel electrode (17a); and a first capacitor electrode (77) electrically connected to a second pixel electrode (17b), which second capacitor electrode (37) is provided in a layer sandwiched between the first capacitor electrode (77) and the second pixel electrode (17b).
    Type: Grant
    Filed: August 19, 2009
    Date of Patent: May 14, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Toshihide Tsubata
  • Patent number: 8436805
    Abstract: Provided is an active matrix substrate configured such that: a retention capacitor line (18x) is provided so as to correspond to a space between adjacent pixel regions (5?, 5?); capacitor electrodes (27xa, 27xb) are provided so as to overlap the retention capacitor line (18x); a retention capacitor line (18y) is provided so as to correspond to a space between adjacent pixel region (5?, 5?); capacitor electrodes (27ya, 27yb) are provided so as to overlap the retention capacitor line (18y); a first pixel electrode (17a) provided in the pixel region (5?) is electrically connected to the capacitor electrode (27xa) overlapping one (18x) of adjacent retention capacitor lines (18x, 18y) and a second pixel electrode (17b) provided in the pixel region (5?) is electrically connected to the capacitor electrode (27yb) overlapping the other one (18y) of the two adjacent retention capacitor lines (18x, 18y); and an interconnection line (27ia) for electrically connecting the first pixel electrode (17a) is provided.
    Type: Grant
    Filed: March 5, 2008
    Date of Patent: May 7, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Naoshi Yamada, Toshihide Tsubata
  • Patent number: 8427413
    Abstract: In one embodiment of the present invention, a liquid crystal display device is disclosed in which a gate driver applies a gate-on pulse so that a second period is longer than a first period. The first period and the second period are defined as follows. Among gate-on pulses applied before the moment of polarity inversion of a data signal, the last end of the gate-on pulse nearest to the moment of the polarity inversion is earlier than the end time of the horizontal period during which the gate-on pulse is applied. The first period starts at the last end of the gate-on pulse and ends at the end time of the horizontal period during which the gate-on pulse is applied. The second period starts at the moment of the polarity inversion and ends at the moment of the application start of the gate-on pulse nearest to the moment of the polarity inversion among the gate-on pulses applied after the polarity inversion.
    Type: Grant
    Filed: March 27, 2008
    Date of Patent: April 23, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Masae Kitayama, Kentaro Irie, Fumikazu Shimoshikiryoh, Toshihide Tsubata, Naoshi Yamada
  • Patent number: 8421942
    Abstract: Provided are an active matrix substrate including plural pixel electrodes in a pixel region and a liquid crystal display device (pixel division mode) using the same. Proposed is a configuration of the liquid crystal display device of the capacitor-coupled pixel division mode which hardly causes reduction in display quality due to image-sticking of sub-pixels.
    Type: Grant
    Filed: January 21, 2009
    Date of Patent: April 16, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Toshihide Tsubata
  • Patent number: 8411216
    Abstract: Each pixel region includes first and second pixel electrodes (17a, 17b) and first and second capacitor electrodes (67x, 67y) positioned on a layer where a data signal line (15) exists. The first and second capacitor electrodes are aligned in a row direction in such a manner as to overlap a retention capacitor line (18) via a first insulating film and to overlap the second pixel electrode (17b) via a second insulating film. A drain electrode (9) of a transistor (12), the first pixel electrode (17a), a first connection line (38) connected with the first capacitor electrode (67x), and the second connection line connected with the second capacitor electrode (67y) are electrically connected with one another. A part of the first connection line (38) and a part of the second connection line (39) do not overlap the retention capacitor line (18).
    Type: Grant
    Filed: July 15, 2009
    Date of Patent: April 2, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Toshihide Tsubata
  • Patent number: 8368833
    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: Grant
    Filed: September 12, 2011
    Date of Patent: February 5, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Tomoki Noda, Toshihide Tsubata, Masanori Takeuchi, Kenji Enda
  • Patent number: 8363175
    Abstract: A scanning signal line (16) has an opening (29) in the vicinity of an intersection with a data signal line (15). A first transistor (12a) includes two source electrodes (9ax and 9ay) which sandwich a drain electrode (8a); a source electrode (9ax) is connected to the data signal line (15) via a source extension electrode (10ax) stretched above the opening (29), and a source electrode (9ay) is connected to the data signal line (15) via a source extension electrode (10ay) provided off the scanning signal line (16). A second transistor (12b) includes two source electrodes (9bx and 9by) that sandwich a drain electrode (8b) therebetween. A source electrode (9bx) is connected to the data signal line (15) via a source extension electrode (10bx), and a source electrode (9by) is connected to the data signal line (15) via a source extension electrode (10by) off the scanning signal line.
    Type: Grant
    Filed: February 22, 2008
    Date of Patent: January 29, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Ikumi Itsumi, Toshihide Tsubata
  • Publication number: 20130003008
    Abstract: The present invention provides a liquid crystal display panel which can prevent an electric short circuit (leakage) between a pair of substrates with no additional production step in the case where a multilayer spacer is used. The present invention is a liquid crystal display panel comprising: a pair of substrates; and a liquid crystal layer between the substrates, wherein a first substrate of the substrates has a support substrate, a plurality of pixel electrodes, transparent colored layers of plural colors overlapping with the pixel electrodes, and a multilayer spacer formed of a stacked body of three or more resin layers including transparent colored layers of plural colors, and a second substrate of the substrates has a supporting substrate and a common electrode.
    Type: Application
    Filed: November 29, 2010
    Publication date: January 3, 2013
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Yoshitaka Okumoto, Toshinori Sugihara, Toshihide Tsubata, Keiichi Tanaka
  • Patent number: 8345197
    Abstract: A liquid crystal display device includes: a vertical alignment liquid crystal layer; first and second substrates facing each other with the liquid crystal layer interposed; first and second electrodes arranged on the first and second substrates to face the liquid crystal layer; and at least one alignment film in contact with the liquid crystal layer. A pixel region includes a first liquid crystal domain in which liquid crystal molecules are tilted in a first direction around the center of a plane, and approximately at the middle of the thickness, of the liquid crystal layer responsive to a voltage applied. The first liquid crystal domain is close to at least a part of an edge of the first electrode. The part includes a first edge portion in which an azimuthal direction, perpendicular to the part and pointing toward the inside of the first electrode, defines an angle greater than 90 degrees to the first direction.
    Type: Grant
    Filed: June 29, 2011
    Date of Patent: January 1, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Akihiro Shoraku, Toshihide Tsubata, Koichi Miyachi, Iichiro Inoue, Akihiro Yamamoto, Yoshito Hashimoto, Masumi Kubo, Akihito Jinda
  • Patent number: 8344383
    Abstract: An active matrix substrate includes: a plurality of pixel electrodes arranged in a matrix pattern and each forming a pixel; a plurality of gate lines each provided between the corresponding pixel electrodes and extending in parallel with each other; a plurality of first source lines each provided between the corresponding pixel electrodes and extending in a direction crossing an extending direction of the gate lines; a plurality of TFTs provided corresponding to the respective pixel electrodes and connected to the respective pixel electrodes, the respective gate lines, and the respective first source lines; a plurality of capacitor lines each provided between the corresponding gate lines and extending in parallel with each other; and a plurality of second source lines each provided between the corresponding pixel electrodes and extending in parallel with the first source lines.
    Type: Grant
    Filed: January 26, 2011
    Date of Patent: January 1, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Toshihide Tsubata
  • Patent number: 8334954
    Abstract: Each pixel region includes first, second, third and fourth liquid crystal domains that come to have first, second, third and fourth predetermined tilt directions, respectively, in response to a voltage applied. The first, second, third and fourth directions are defined such that an angle formed between any two of the four directions is approximately equal to an integral multiple of 90 degrees. The first, second, third and fourth liquid crystal domains are arranged in two columns and two rows so as to define a matrix pattern and to be adjacent to each other. An extended portion of a storage capacitor line defines at least a part of a central opaque portion that selectively shields at least a part of a boundary area, where each of the first, second, third and fourth liquid crystal domains contacts with another one of the liquid crystal domains, from incoming light.
    Type: Grant
    Filed: April 4, 2007
    Date of Patent: December 18, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Akihiro Shoraku, Toshihide Tsubata
  • Patent number: 8334965
    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: December 18, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kohji Matsuoka, Shinichi Hirato, Akihiro Shoraku, Kenji Enda, Tsuyoshi Tokuda, Toshihide Tsubata
  • Patent number: 8330883
    Abstract: An active matrix substrate includes: storage capacitor wirings (18); a Cs trunk wiring (50) connected with the storage capacitor wirings via contact holes (48) provided in a non-display region (44); scanning signal lines (16) provided in the same layer as the storage capacitor wirings (18) and crossing the Cs trunk wiring (50) in the non-display region (44); an insulating layer between the storage capacitor wirings (18) and the Cs trunk wiring (50) which includes: a through-bore portion for forming the contact hole (48); a first film thickness portion (53) adjacent to the through-bore portion; and a second film thickness portion which is thicker than the first film thickness portion (53) and situated at least in the intersections of the storage capacitor wirings (18) with the Cs trunk wiring (50).
    Type: Grant
    Filed: March 30, 2007
    Date of Patent: December 11, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Toshihide Tsubata, Toshifumi Yagi
  • Publication number: 20120306732
    Abstract: A liquid crystal display device (100) according to the present invention has a plurality of pixels that are arranged in columns and rows to form a matrix pattern and one color display pixel (P) is comprised of four or any other larger even number of pixels. The liquid crystal display device (100) of the present invention includes a plurality of source bus lines (13) which run in a column direction. The even number of pixels that form one color display pixel (P) include larger pixels with a relatively large area and smaller pixels with a relatively small area. Each set of pixels to be supplied with a signal voltage from an associated one of the plurality of source bus lines (13) has substantially the same total area as any other set of pixels. According to the present invention, in a liquid crystal display device in which a plurality of pixels that forms one color display pixel includes the larger and smaller pixels, generation of display unevenness that runs in the column direction can be minimized.
    Type: Application
    Filed: January 24, 2011
    Publication date: December 6, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Toshinori Sugihara, Toshihide Tsubata, Yuki Yamashita, Fumikazu Shimoshikiryoh, Mitsuaki Hirata, Kenichi Hyohdoh, Ikumi Itsumi, Akane Sugisaka, Masae Kitayama
  • Patent number: 8319906
    Abstract: A scanning signal line (16) includes an opening (29) leading from the outside of a pixel region through below a data signal line (15) into the pixel region, and first and second scanning electrode portions (16a/16b) or two side portions of the opening confronting in a column direction through that opening. The end portion of the first scanning electrode portion (16a) in the pixel region is a first end portion (EP1), and the end portion of the second scanning electrode portion (16b) in the pixel region is a second end portion (EP2). A first transistor has a source electrode (9a) and a drain electrode (8a) individually overlapping the first electrode portion (16a) but not the first end portion (EP1) in the pixel region. A second transistor has a source electrode (9b) and a drain electrode (8b) individually overlapping the second electrode portion (16b) but not the second end portion EP2) in the pixel region.
    Type: Grant
    Filed: October 29, 2007
    Date of Patent: November 27, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kenji Enda, Ikumi Itsumi, Toshihide Tsubata, Masanori Takeuchi
  • Patent number: 8319926
    Abstract: In the liquid crystal display device of the present invention, each pixel region includes first, second and third subpixel electrodes 111a, 111b1 and 111b2, a vertical alignment liquid crystal layer, a counter electrode 121, and an alignment film. The second and third subpixel electrodes are arranged to interpose the first subpixel electrode. Each pixel region is comprised of first, second and third regions associated with the first, second and third subpixel electrodes, respectively. Each pixel region includes eight liquid crystal domains in total, consisting of two sets of four liquid crystal domains A, B, C and D of first, second, third and fourth types, in which an angle formed between any two tilt directions is approximately equal to an integral multiple of 90 degrees.
    Type: Grant
    Filed: December 3, 2007
    Date of Patent: November 27, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Akihiro Shoraku, Toshihide Tsubata
  • Publication number: 20120293567
    Abstract: The present invention provides a display device having color display dots with improved brightness and being excellent in visibility. The display device of the present invention comprises a pixel including an odd number of and at least three first sub pixels; and second sub pixels having a higher brightness than the first sub pixels, wherein units of the odd number of first sub pixels are repeatedly arranged, the second sub pixels are sequentially arranged along the arrangement direction of the first sub pixels, and the second sub pixels and at least one of the first sub pixels are alternately arranged in a direction perpendicular to the arrangement direction of the first sub pixels.
    Type: Application
    Filed: October 26, 2010
    Publication date: November 22, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Masayuki Katagami, Atsushi Ban, Toshihide Tsubata, Takehisa Yoshida
  • Publication number: 20120287349
    Abstract: Provided is a liquid crystal display device including: pixels that are provided in a row direction and a column direction in which data signal lines extend, the pixels each including a plurality of pixel electrodes, in a pixel, in an nth frame, a pixel electrode being electrically connected to a data signal line, and in the frame, the plurality of pixel electrodes being electrically connected to each other and being electrically disconnected from the data signal line. This allows an improvement in viewing angle characteristic of a liquid crystal display device.
    Type: Application
    Filed: November 9, 2010
    Publication date: November 15, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Toshihide Tsubata