Patents by Inventor Shinichi Komura

Shinichi Komura 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: 20150102988
    Abstract: According to one embodiment, a lateral electric-field type of liquid crystal display device includes a display panel and a controller, wherein a frame frequency falls within a range of 1 Hz to 10 Hz, an off-leak current of each of the TFTs has a value of 1×10?15 A or less, a resistivity of a liquid crystal and a resistivity of an alignment film both fall within one of a first range and a second range, the first range being 1×1013 to 5×1013 ?·cm, the second range being 5×1013 to 5×1014 ?·cm, and a relationship of “R1×C1?R2×C2” is satisfied, where R1 is a resistance and C1 is a capacity with respect to each pixel, R2 is a resistance and C2 is a capacity with respect to each pixel.
    Type: Application
    Filed: October 9, 2014
    Publication date: April 16, 2015
    Applicant: Japan Display Inc.
    Inventors: Daiichi SUZUKI, Yukio TANAKA, Kenji NAKAO, Kazuhiro NISHIYAMA, Shinichi KOMURA, Shinichiro OKA, Mika OIWA
  • Patent number: 8988619
    Abstract: There is provided a technology capable of reducing crosstalk at the time of 3D display in a display device using a liquid crystal lens that forms cylindrical lenses by controlling a voltage applied to a liquid crystal panel. The display device includes a liquid crystal display panel which includes a substrate including a plurality of strip-shaped transparent electrodes and a plurality of strip-shaped light shielding portions overlapping with the electrodes. The display device displays an image by switching a two-dimensional display and a three-dimensional display, and the cylindrical lenses making up a parallax barrier, are formed by controlling a refraction index of a liquid crystal layer.
    Type: Grant
    Filed: March 5, 2014
    Date of Patent: March 24, 2015
    Assignee: Japan Display Inc.
    Inventors: Shinichiro Oka, Tatsuya Sugita, Shinichi Komura, Toshio Miyazawa, Terunori Saitou
  • Publication number: 20150035816
    Abstract: According to one embodiment, a lateral electric-field type of liquid crystal display device includes a display panel including a plurality of liquid crystal pixels arranged in a matrix, and a controller configured to perform intermittent driving to rewrite an image signal to the liquid crystal pixels, wherein a frame frequency falls within a range of 10 Hz to 20 Hz, and an absolute value of a flexo coefficient (e11, e33) of a liquid crystal applied to the liquid crystal pixels is 1.6 pC/m or less.
    Type: Application
    Filed: August 1, 2014
    Publication date: February 5, 2015
    Applicant: Japan Display Inc.
    Inventors: Daiichi SUZUKI, Yukio Tanaka, Kenji Nakao, Kazuhiro Nishiyama, Shinichi Komura, Shinichiro Oka, Mika Oiwa
  • Publication number: 20150035738
    Abstract: In a color display device, when using white (W) sub-pixels in addition to subpixels of red (R) and green (G) plus blue (B) without increasing a wiring line number, the per-color pixel number in a unit area decreases so that the image resolution is deteriorated. The area and number of subpixels are adjusted in accordance with the visual sensitivity or luminosity required. Practically, the area of red (R) and blue (B) subpixels which are relatively low in luminosity is set to be about two times greater than the area of green (G) and white (W) subpixels that are relatively high in luminosity while letting the number of green (G) and white (W) subpixels be twice the number of red (R) and blue (B) subpixels. A larger subpixel is configured from a plurality of unit subpixels. A smaller subpixel is formed of a one unit subpixel.
    Type: Application
    Filed: October 20, 2014
    Publication date: February 5, 2015
    Inventors: Shoichi HIROTA, Shinichi KOMURA, Yoshifumi SEKIGUCHI, Tsunenori YAMAMOTO, Masaya ADACHI
  • Patent number: 8891044
    Abstract: In a color display device, when using white (W) sub-pixels in addition to subpixels of red (R) and green (G) plus blue (B) without increasing a wiring line number, the per-color pixel number in a unit area decreases so that the image resolution is deteriorated. The area and number of subpixels are adjusted in accordance with the visual sensitivity or luminosity required. Practically, the area of red (R) and blue (B) subpixels which are relatively low in luminosity is set to be about two times greater than the area of green (G) and white (W) subpixels that are relatively high in luminosity while letting the number of green (G) and white (W) subpixels be twice the number of red (R) and blue (B) subpixels. A larger subpixel is configured from a plurality of unit subpixels. A smaller subpixel is formed of a one unit subpixel.
    Type: Grant
    Filed: October 10, 2007
    Date of Patent: November 18, 2014
    Assignees: Japan Display Inc., Panasonic Liquid Display Co., Ltd.
    Inventors: Shoichi Hirota, Shinichi Komura, Yoshifumi Sekiguchi, Tsunenori Yamamoto, Masaya Adachi
  • Publication number: 20140306879
    Abstract: Two-parallax autostereoscopic display device using eye tracking has a problem in which the brightness is varied depending on the direction of viewing angle. A 3D display device is provided with a detection part for recognizing a position of eyes from an image taken by a camera; a separation mechanism which enables a 3D image to be regenerated at the optimum position for eyes based on information on the position of eyes detected by the detection part; a display device for displaying a plurality of different parallax images at the same time; a backlight attached to the display device; and a backlight control part for controlling the backlight, wherein the backlight control part determines brightness of the backlight in accordance with the position of eyes determined by the detection part.
    Type: Application
    Filed: April 10, 2014
    Publication date: October 16, 2014
    Applicant: Japan Display Inc.
    Inventors: Shinichiro OKA, Shinichi KOMURA, Tomohiko NAGANUMA
  • Patent number: 8836685
    Abstract: The liquid crystal display device includes: first and second substrates disposed facing each other via a liquid crystal layer, each substrate having a plurality of pixels arranged thereon in matrix form; a first electrode formed for each pixel on the first substrate side; a second electrode formed for each pixel on the first or second substrate side; and the liquid crystal layer being driven by a liquid crystal drive voltage applied between the first and second electrodes; wherein an inequation of VLmin?VLmax<Vmax is satisfied, where VLmin is a liquid crystal drive voltage applied to the pixel to produce minimum brightness, VLmax is a liquid crystal drive voltage applied to the pixel to produce maximum brightness, and Vmax is a maximum liquid crystal drive voltage applied to the pixel.
    Type: Grant
    Filed: January 13, 2011
    Date of Patent: September 16, 2014
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventor: Shinichi Komura
  • Publication number: 20140192283
    Abstract: There is provided a technology capable of reducing crosstalk at the time of 3D display in a display device using a liquid crystal lens that forms cylindrical lenses by controlling a voltage applied to a liquid crystal panel. The display device includes a liquid crystal display panel which includes a substrate including a plurality of strip-shaped transparent electrodes and a plurality of strip-shaped light shielding portions overlapping with the electrodes. The display device displays an image by switching a two-dimensional display and a three-dimensional display, and the cylindrical lenses making up a parallax barrier, are formed by controlling a refraction index of a liquid crystal layer.
    Type: Application
    Filed: March 5, 2014
    Publication date: July 10, 2014
    Applicant: Japan Display Inc.
    Inventors: Shinichiro OKA, Tatsuya Sugita, Shinichi Komura, Toshio Miyazawa, Terunori Saitou
  • Patent number: 8692966
    Abstract: Provided is a liquid crystal display device including: a first substrate; a second substrate; a liquid crystal layer sandwiched between the first and the second substrates; a first polarization plate placed on a side of the first substrate; a second polarization plate placed on a side of the second substrate; and a pixel electrode and a common electrode which are provided on the side of the second substrate on which the liquid crystal layer is placed, in which: at least one of the pixel electrode and the common electrode is interdigital; and the liquid crystal layer has flexoelectric coefficients e11 and e33, both absolute values of which are +7 pC/m or less. Accordingly, a flicker intensity in an IPS liquid crystal display device is suppressed to such a degree as not to influence display quality.
    Type: Grant
    Filed: May 24, 2010
    Date of Patent: April 8, 2014
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Shinichiro Oka, Shinichi Komura, Hirotaka Imayama, Takeshi Sato, Osamu Itou
  • Publication number: 20140063435
    Abstract: A liquid crystal display device includes a first substrate, a second substrate, a liquid crystal layer disposed between the first substrate and the second substrate, and an electrode group provided on at least one of the first substrate and the second substrate, and that applies an electric field to the liquid crystal layer, wherein the liquid crystal layer contains at least one liquid crystalline compound, and at least one chiral dopant, wherein one of the liquid crystalline compounds contained in the liquid crystal layer develops a blue phase liquid crystal, and wherein the liquid crystal layer has a storage elastic modulus G? of 4,000 Pa or more at 25° C. and 1 Hz frequency.
    Type: Application
    Filed: September 5, 2013
    Publication date: March 6, 2014
    Applicant: JAPAN DISPLAY INC.
    Inventors: Mika OIWA, Shinichi KOMURA
  • Patent number: 8654069
    Abstract: In a display device, pixel electrodes I, II and III corresponding to color filters R, G and B are coupled to TFTs which are turned on in accordance with signals on gate lines G, and the drain (source) of the TFT coupled to the pixel electrode II is connected with the source (drain) of the TFT coupled to the pixel electrode III. A signal voltage is written in the pixel electrode I when the gate line G1a is in the “on” state, a signal voltage is written in the pixel electrode II when the gate line G1b is in the “on” state, and a signal voltage is written in the pixel electrode III when the gate lines G1a and G1b are both in the “on” state. Signal voltages are written in the pixel electrodes III, I and II in this order mentioned.
    Type: Grant
    Filed: February 6, 2008
    Date of Patent: February 18, 2014
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Norio Mamba, Tsutomu Furuhashi, Shinichi Komura
  • Patent number: 8648991
    Abstract: Provided is a liquid crystal display device, including: a first substrate including a first electrode and a second electrode each including a plurality of linear electrodes and formed so as to be comb-like; a second substrate; a blue-phase liquid crystal layer; first drain lines and second drain lines extending in Y direction and provided side by side in X direction; gate lines extending in the X direction; a first thin film transistor for supplying a drain signal from one of the first drain lines to the first electrode; a second thin film transistor for supplying a drain signal from one of the second drain lines to the second electrode, which is plate-like and formed on the blue-phase liquid crystal layer side of the second substrate so as to cover at least a region in which pixels are formed.
    Type: Grant
    Filed: December 19, 2011
    Date of Patent: February 11, 2014
    Assignee: Japan Display Inc.
    Inventors: Mika Oiwa, Shintaro Takeda, Shinichi Komura
  • Publication number: 20140036174
    Abstract: To provide a stereoscopic display apparatus, enabling to move the position of a viewpoint, not only left/right, but also in front/back directions, and to widen a range from where a 3D image can be seen. A stereoscopic display apparatus, with applying a stereoscopic display panel therein, comprising: a display element, which is configured to display parallax images for a left-side eye and a right-side eye, simultaneously; and a liquid crystal lens, which is attached onto the display element and configured to adjust a direction of a light emitting from the display element, further comprises an observer position detecting means and a liquid crystal lens driving means, wherein the liquid crystal lens driving means changes the pitch of a pattern of voltage to be applied onto plural numbers of electrodes of the liquid crystal lens, depending on the position of the observer, which is detected by the observer position detecting means.
    Type: Application
    Filed: August 1, 2013
    Publication date: February 6, 2014
    Applicant: Japan Display Inc.
    Inventors: Shinichiro OKA, Shinichi KOMURA
  • Patent number: 8633878
    Abstract: An image display is provided with a display area including pixels, each including illuminating means. A control circuit turns the illuminating means of the pixels on and off. A first terminal of a capacitor is connected to an input terminal of the control circuit. An image signal voltage generation circuit generates image signal voltages and a pixel drive voltage generation circuit generates pixel drive voltages for the pixels. A connector is provided for connecting either one of the image signal voltages or the pixel drive voltages to a second terminal of the capacitor. As such, an amount of drive current for the pixels is controlled in accordance with both the pixel drive voltage and the image signal voltage.
    Type: Grant
    Filed: March 6, 2012
    Date of Patent: January 21, 2014
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Hajime Akimoto, Shigeyuki Nishitani, Shinichi Komura, Toshihiro Sato, Hiroshi Kageyama, Yoshiteru Shimizu
  • Patent number: 8599325
    Abstract: A liquid crystal display device includes a TFT substrate with gate lines and drain lines, and pixel electrodes each formed in a region surrounded by the gate lines and drain lines. Protrusions are formed below the gate lines, each of the protrusions having an upper surface and at least one inclined side surface. A gate insulating film is formed over the gate lines, a semiconductor layer formed on the gate insulating film, and drain electrodes formed and source electrodes formed over the semiconductor layer. Channel portions are defined by the space between the drain electrodes and the source electrodes, each of the channel portions being formed covering the upper surface and at least one of the at least one inclined side surface of one of the protrusions, the pixel and source electrode being in contact with each other on at least one inclined side surface of the protrusion.
    Type: Grant
    Filed: May 22, 2013
    Date of Patent: December 3, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Jun Gotoh, Hirotaka Imayama, Shinichi Komura, Masato Shimura
  • Publication number: 20130248898
    Abstract: A liquid crystal display device includes a TFT substrate with gate lines and drain lines, and pixel electrodes each formed in a region surrounded by the gate lines and drain lines. Protrusions are formed below the gate lines, each of the protrusions having an upper surface and at least one inclined side surface. A gate insulating film is formed over the gate lines, a semiconductor layer formed on the gate insulating film, and drain electrodes formed and source electrodes formed over the semiconductor layer. Channel portions are defined by the space between the drain electrodes and the source electrodes, each of the channel portions being formed covering the upper surface and at least one of the at least one inclined side surface of one of the protrusions, the pixel and source electrode being in contact with each other on at least one inclined side surface of the protrusion.
    Type: Application
    Filed: May 22, 2013
    Publication date: September 26, 2013
    Applicants: Panasonic Liquid Crystal Display Co., Ltd., Japan Display Inc.
    Inventors: Jun Gotoh, Hirotaka Imayama, Shinichi Komura, Masato Shimura
  • Patent number: 8451418
    Abstract: A liquid crystal display device having a high definition screen in which a pixel electrode is formed in a region surrounded by a gate line and a drain line, and a trapezoidal protrusion having an upper surface and inclined surfaces is formed below the gate line. Since a TFT is formed over a trapezoidal protrusion and a channel portion is formed over the upper surface and the inclined surfaces of the trapezoidal protrusion, the width of the channel portion can be enlarged compared to that of a channel portion formed over a plane. The pixel electrode is in contact with a source electrode at the inclined surface of the trapezoidal protrusion. This configuration allows the TFT and a contact of the pixel electrode and a source electrode to be formed over part of the trapezoidal protrusion.
    Type: Grant
    Filed: October 28, 2011
    Date of Patent: May 28, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Jun Gotoh, Hirotaka Imayama, Shinichi Komura, Masato Shimura
  • Patent number: 8379168
    Abstract: An object of the present invention is to provide a liquid crystal display device where there are fewer moiré effects between lenticular lenses and the backlight. The present invention provides a liquid crystal display device where the arrangement or form of lenticular lenses 1 varies in waveform so that the center line of the lenses, the width of the lenses, and the height of the lenses vary in the case where light emitted from a backlight 59 is collected into openings 15 for transmitting light by means of lenticular lenses 1.
    Type: Grant
    Filed: August 17, 2009
    Date of Patent: February 19, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Tatsuya Sugita, Shinji Sekiguchi, Atsushi Kishioka, Shinichi Komura
  • Publication number: 20130038811
    Abstract: In order to provide a display device capable of improving the display quality at the time of 2D display and 3D display, the present invention provides a display device that includes: a display panel that displays an image; and a liquid, crystal lens panel that is arranged on the display surface side of the display panel, controls a refractive index in a cylindrical lens manner to form parallax barriers, and switches 2D display and 3D display, and the liquid crystal lens panel includes: a first transparent substrate that is arranged on the display panel side; a second transparent substrate that is arranged to face the first substrate through a liquid crystal layer; and a first polarizing plate that is formed on the display surface side of the second transparent substrate to control a polarization direction of light transmitting through the liquid crystal lens panel.
    Type: Application
    Filed: August 7, 2012
    Publication date: February 14, 2013
    Inventors: Tatsuya SUGITA, Shinichiro Oka, Shinichi Komura, Toshio Miyazawa, Terunori Saitou
  • Patent number: 8314761
    Abstract: A processing portion for conversion from RGB to RGBW includes a W generating circuit, a sub-pixel rendering circuit, a W intensity calculating portion which transmits a W intensity setting value to a W generating circuit, and a low power backlight control circuit which expands data on the basis of the RGBW pixels generated by the sub-pixel rendering portion and lowers the backlight in accordance with the amount by which the data is expanded. The inputted RGB data is used as the RGBW data with the W intensity calculated by the W intensity calculating portion. A backlight control signal is generated based on the amount of data expansion in the sub-pixel rendering portion. Deterioration (darkness) of image quality due to a reduction in the brightness of a single color as a result of the conversion from RGB pixels to RGBW pixels is prevented and a reduction in the power is achieved.
    Type: Grant
    Filed: June 15, 2012
    Date of Patent: November 20, 2012
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Naoki Takada, Yasuyuki Kudo, Yoshiki Kurokawa, Norio Mamba, Shinichi Komura