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: 20120257156
    Abstract: A liquid crystal display device includes a first substrate provided with first and second electrodes, and a second substrate disposed to be opposite to the first substrate via a liquid crystal layer. Regions of pixels each having the first and second electrodes are arranged in a matrix, and the liquid crystal layer is driven by an electric field in an in-plane direction of the first substrate, applied between the first and second electrodes. A step difference is formed at an opposite side of the first substrate for each of the pixel regions. The first or second electrode includes a wall-shaped electrode formed at a side wall surface of the step difference and a planar electrode formed from an edge of the wall-shaped electrode along the main surface of the first substrate. The wall-shaped electrode and the planar electrode are electrically connected to each other.
    Type: Application
    Filed: March 27, 2012
    Publication date: October 11, 2012
    Inventors: Takato HIRATSUKA, Osamu Itou, Shinichiro Oka, Shinichi Komura
  • Publication number: 20120249613
    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: Application
    Filed: June 15, 2012
    Publication date: October 4, 2012
    Inventors: Naoki TAKADA, Yasuyuki Kudo, Yoshiki Kurokawa, Norio Mamba, Shinichi Komura
  • Patent number: 8248562
    Abstract: Provided is a display panel having a high-performance antireflection layer at a low cost. In a liquid crystal display panel or an organic light-emitting diode display panel constituted by a first transparent substrate, a second transparent substrate and a liquid crystal layer between these two transparent substrates further includes an antireflection layer on a portion which is at least one display area and a visible side (outer surface) by a viewer, and layers made of the same material as the antireflection layer formed on at least the opposite side (inside surface) of the surface of the portion corresponding to the display area and on three edge faces.
    Type: Grant
    Filed: August 28, 2006
    Date of Patent: August 21, 2012
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Masaya Adachi, Makiko Sugibayashi, Tetsuya Ohshima, Shinichi Komura
  • Patent number: 8232944
    Abstract: The 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. A processing portion for conversion from RGB to RGBW 106 is formed of a W generating circuit 201, which is the same as in the prior art, a sub-pixel rendering circuit 202, a W intensity calculating portion 203 which transmits a W intensity setting value 205 to a W generating circuit 201, and a low power backlight control circuit 204 which expands data on the basis of the RGBW pixels generated by the sub-pixel rendering portion 202 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 203. A backlight control signal is generated in accordance with the amount of data expansion in the sub-pixel rendering portion 202.
    Type: Grant
    Filed: January 14, 2009
    Date of Patent: July 31, 2012
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Naoki Takada, Yasuyuki Kudo, Yoshiki Kurokawa, Norio Mamba, Shinichi Komura
  • Publication number: 20120162560
    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: Application
    Filed: December 19, 2011
    Publication date: June 28, 2012
    Inventors: Mika OIWA, Shintaro Takeda, Shinichi Komura
  • Publication number: 20120162180
    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: Application
    Filed: March 6, 2012
    Publication date: June 28, 2012
    Inventors: Hajime AKIMOTO, Shigeyuki Nishitani, Shinichi Komura, Toshihiro Sato, Hiroshi Kageyama, Yoshiteru Shimizu
  • Publication number: 20120120331
    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: November 9, 2011
    Publication date: May 17, 2012
    Inventors: Shinichiro OKA, Tatsuya Sugita, Shinichi Komura, Toshio Miyazawa, Terunori Saitou
  • Patent number: 8179497
    Abstract: An object of the present invention is to provide a simply configured liquid crystal display device capable of providing a high front luminance when light obliquely enters a micro lens array.
    Type: Grant
    Filed: August 15, 2008
    Date of Patent: May 15, 2012
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Tatsuya Sugita, Shinichi Komura, Tetsuya Nagata, Masaya Adachi
  • Publication number: 20120105771
    Abstract: A display device includes: a first liquid crystal display panel which performs an image display; a second liquid crystal display panel which is arranged on a back surface side of the first liquid crystal display panel and performs a display of a parallax barrier pattern; a backlight unit which is arranged on aback surface side of the second liquid crystal display panel; and a first SP wave reflector which is arranged between the first liquid crystal display panel and the second liquid crystal display panel, and allows the transmission of light having a polarization component, which has one polarization direction, of lights having two polarization components orthogonal to each other and reflects the light having a polarization component orthogonal to the polarization direction, wherein the first SP wave reflector reflects the backlight light corresponding to the light blocking regions to the second liquid crystal display panel.
    Type: Application
    Filed: October 25, 2011
    Publication date: May 3, 2012
    Inventors: Shinichiro OKA, Shinichi Komura
  • Publication number: 20120105787
    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: Application
    Filed: October 28, 2011
    Publication date: May 3, 2012
    Inventors: Jun GOTOH, Hirotaka Imayama, Shinichi Komura, Masato Shimura
  • Patent number: 8164728
    Abstract: There is provided a liquid crystal display device capable of decreasing the driving voltage of a liquid crystal display panel. The liquid crystal display device includes: a first substrate and a second substrate; a liquid crystal layer interposed between the first substrate and the second substrate; and a pixel electrode and a common electrode arranged between the second substrate and the liquid crystal layer. Either one of the pixel electrode or the common electrode has an interdigital shape. An absolute value of both flexoelectric coefficients e11 and e33 of the liquid crystal layer is equal to or greater than 5 pC/m.
    Type: Grant
    Filed: July 27, 2010
    Date of Patent: April 24, 2012
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Shinichiro Oka, Osamu Itou, Shinichi Komura, Hirotaka Imayama
  • Patent number: 8159427
    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 capacitance is provided having a first node connected to an input terminal of the control circuit. A display signal voltage generation circuit generates display signal voltages for the pixels, while a pixel drive voltage generation circuit generates pixel drive voltages for the pixels. In addition, a connector is provided for connecting either one of the display signal voltages or the pixel drive voltages to a second node of the capacitance.
    Type: Grant
    Filed: August 1, 2011
    Date of Patent: April 17, 2012
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Hajime Akimoto, Shigeyuki Nishitani, Shinichi Komura, Toshihiro Sato, Hiroshi Kageyama, Yoshiteru Shimizu
  • Patent number: 8111357
    Abstract: An optical element is arranged in such a manner that a screen thereof can be hardly observed from a predetermined direction, and a deterioration of an image quality caused by moire does not occur. The optical element is constituted by a first polarizing layer, a second polarizing layer, and a liquid crystal layer arranged between these two polarizing layers. In the optical element, absorption axes of the first polarizing layer and the second polarizing layer are located parallel to each other; the liquid crystal layer is made of hybrid-aligned discotic liquid crystal; and an alignment axis of the liquid crystal layer is located parallel to, or perpendicular to both absorption axes of the first polarizing layer and of the second polarizing layer.
    Type: Grant
    Filed: November 14, 2005
    Date of Patent: February 7, 2012
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Masaya Adachi, Osamu Itou, Shinichi Komura
  • Publication number: 20110279434
    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 capacitance is provided having a first node connected to an input terminal of the control circuit. A display signal voltage generation circuit generates display signal voltages for the pixels, while a pixel drive voltage generation circuit generates pixel drive voltages for the pixels. In addition, a connecter is provided for connecting either one of the display signal voltages or the pixel drive voltages to a second node of the capacitance.
    Type: Application
    Filed: August 1, 2011
    Publication date: November 17, 2011
    Inventors: Hajime AKIMOTO, Shigeyuki Nishitani, Shinichi Komura, Toshihiro Sato, Hiroshi Kageyama, Yoshiteru Shimizu
  • Patent number: 8031144
    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 capacitance is provided having a first node connected to an input terminal of the control circuit. A display signal voltage generation circuit generates display signal voltages for the pixels, while a pixel drive voltage generation circuit generates pixel drive voltages for the pixels. In addition, a connecter is provided for connecting either one of the display signal voltages or the pixel drive voltages to a second node of the capacitance.
    Type: Grant
    Filed: September 21, 2007
    Date of Patent: October 4, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Hajime Akimoto, Shigeyuki Nishitani, Shinichi Komura, Toshihiro Sato, Hiroshi Kageyama, Yoshiteru Shimizu
  • Patent number: 8016445
    Abstract: A planar light emitting element is capable of outputting light having high directivity in at least one direction. The planar light emitting element has a light guide plate and first and second low refractive index layers. Light incident on the light guide plate is totally reflected on the interface between the light guide plate and the second low refractive index layer, propagates in the light guide plate, and is output from the light guide plate to the first low refractive index layer through a light output opening section. When a refractive index of the first low refractive index layer is sufficiently smaller than a refractive index of the light guide plate, the light propagates in the light guide plate at a large angle with respect to a light output surface of the light guide plate. When the difference between the refractive indexes of the first and second low refractive index layers is small, a spreading angle of light output to the first low refractive index layer is small.
    Type: Grant
    Filed: August 15, 2008
    Date of Patent: September 13, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventors: Tatsuya Sugita, Masaya Adachi, Shinichi Komura
  • Patent number: 8004545
    Abstract: A display apparatus is arranged to have pixels, each of which has a RGBW (Red, Green, Blue and White) wavelength distribution characteristic, located two-dimensionally. The display apparatus includes an input unit for inputting a signal for controlling a using ratio of a W signal, a color signal converting unit for calculating a RGBW driving signal from a RGB input signal and the W using ratio. The RGBW signal is calculated so as to control the contribution of the W signal to the image quality. The display apparatus switches the display from the contrast-highlighted display in a relatively bright lighting condition to the color-reproducibility-highlighted display in a relatively gloomy lighting condition.
    Type: Grant
    Filed: October 10, 2007
    Date of Patent: August 23, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventors: Tatsuki Inuzuka, Shinichi Komura, Yoshifumi Sekiguchi
  • Publication number: 20110187695
    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: Application
    Filed: January 13, 2011
    Publication date: August 4, 2011
    Inventor: Shinichi KOMURA
  • Patent number: 7990369
    Abstract: An image display apparatus configured by a display panel having an image memory element in a pixel, which achieves low power consumption. A nonvolatile image memory element 1, which can change the resistance value by phase change, is connected to a pixel electrode 25 of a liquid crystal element 5. The output of a thin-film transistor 17 driven by scanning and signal electrode lines 7, 9 is connected to the pixel electrode 25. When the scanning electrode line 7 is selected to have a high level voltage, the thin-film transistor 17 is turned on and a current signal flowing through the signal electrode 9 is sent through the image memory element 1 to a reference electrode line 15. Depending on the current value or pulse width passing through the image memory element 1, the resistance of the image memory element 1 is changed and is stored as a resistance value.
    Type: Grant
    Filed: May 24, 2007
    Date of Patent: August 2, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventors: Tatsuya Sugita, Shinichi Komura, Shoichi Hirota, Tsunenori Yamamoto, Tetsuya Ooshima, Susumu Edo, Akitoyo Konno
  • Patent number: 7952672
    Abstract: A liquid crystal display device which can enhance optical transmissivity is provided. One pixel region is divided into a first pixel region, a second pixel region and a third pixel region in order from one video signal line to another video signal line, the first pixel region and the third pixel region adopt the so-called IPS-Pro type structure, and the second pixel region adopts the so-called IPS structure in narrow meaning. A line width of linear electrode in the second pixel region is set to 2.5 ?m or less.
    Type: Grant
    Filed: November 17, 2008
    Date of Patent: May 31, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventors: Masateru Morimoto, Shinichi Komura