Patents by Inventor Takehiro Murao

Takehiro Murao 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: 20160261859
    Abstract: A configuration of a stereoscopic display device that is capable of reducing luminance variation that occurs when a viewer moves is obtained, by making improvement regarding the angle dependency of luminance. A stereoscopic display device (1) includes: a display panel (10); a switch liquid crystal panel (20); a first polarizing plate (15); a second polarizing plate (24); a position sensor for acquiring position information of a viewer; and a control unit for moving a parallax barrier in which transmitting regions and non-transmitting regions are formed in periodic fashion in a predetermined alignment direction, in such a manner that the parallax barrier is moved in the predetermined alignment direction in accordance with the position information, and causing the switch liquid crystal panel (20) to display the parallax barrier. The transmitting region has a width greater than a width in the alignment direction of an opening of each of the pixels (110).
    Type: Application
    Filed: August 25, 2014
    Publication date: September 8, 2016
    Inventors: Takehiro MURAO, Ryoh KIKUCHI, Takuto YOSHINO, Hiroshi FUKUSHIMA
  • Publication number: 20160223827
    Abstract: A configuration of a stereoscopic display device that is capable of maintaining crosstalk at a low level even when a viewer moves is provided. A stereoscopic display device (1) includes: a display panel (10) for displaying an image; a switch liquid crystal panel (20) that is arranged so as to be stacked on the display panel (10); a position sensor for acquiring position information of a viewer; and a control unit for moving a parallax barrier in which transmitting regions and non-transmitting regions are formed in periodic fashion in a predetermined alignment direction, in such a manner that the parallax barrier is moved in the predetermined alignment direction in accordance with the position information, and causing the switch liquid crystal panel (20) to display the parallax barrier. The switch liquid crystal panel (20) includes: a liquid crystal layer (23) in which refractive index anisotropy ?n of liquid crystal molecules is 0.
    Type: Application
    Filed: August 20, 2014
    Publication date: August 4, 2016
    Inventors: Takehiro MURAO, Ryoh KIKUCHI, Takuto YOSHINO, Hiroshi FUKUSHIMA
  • Publication number: 20160195731
    Abstract: Obtained is a configuration of a stereoscopic display device wherein luminance variation and increase of crosstalk can be reduced over a period before and after the switching of the parallax barrier. The stereoscopic display device includes: a display panel for displaying an image with a plurality of pixels; a switch liquid crystal panel that is arranged so as to be stacked on the display panel; a position sensor for acquiring position information of a viewer; and a control unit for moving a parallax barrier in which transmitting regions and non-transmitting regions are formed in periodic fashion in a predetermined alignment direction, in such a manner that the parallax barrier is moved in the predetermined alignment direction in accordance with the position information, with use of a predetermined barrier switching pitch as a minimum unit, and causing the switch liquid crystal panel to display the parallax barrier.
    Type: Application
    Filed: February 25, 2014
    Publication date: July 7, 2016
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Takehiro MURAO, Takuto YOSHINO, Hiroshi FUKUSHIMA
  • Publication number: 20160037155
    Abstract: A stereoscopic display device is provided where the luminance variation encountered when the parallax barrier is switched is reduced for viewing from a wide region. The stereoscopic display device includes: a display panel that displays an image; a switch liquid crystal panel disposed to overlie the display panel and including a liquid crystal layer; a position sensor that obtains positional information about a viewer; and a control unit that receives the positional information from the position sensor and locally applies to the liquid crystal layer a first voltage for rendering the switch liquid crystal panel translucent and a second voltage for rendering the switch liquid crystal panel non-translucent to display a parallax barrier that depends on the positional information.
    Type: Application
    Filed: February 14, 2014
    Publication date: February 4, 2016
    Inventors: Takuto YOSHINO, Takehiro MURAO, Hiroshi FUKUSHIMA
  • Patent number: 9213189
    Abstract: The objective is to provide a stereoscopic display device that is capable of preventing a malfunction of the touch panel while maintaining 3D capability. The device includes: a display panel (12); a switch liquid crystal panel (14); a touch panel (20); a driving circuit (16); and an RC circuit (18). The switch liquid crystal panel (14) is located on the front side of the display panel (12) and is capable of forming a parallax barrier (38). The touch panel (20) is located on the front side of the switch liquid crystal panel (14). The driving circuit (16) drives the switch liquid crystal panel (14) to form the parallax barrier (38). The RC circuit (18) is located between the switch liquid crystal panel (14) and the driving circuit (16). The driving circuit (16) drives the switch liquid crystal panel (14) using a voltage with an effective value of 3 volts or more.
    Type: Grant
    Filed: February 7, 2013
    Date of Patent: December 15, 2015
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takuto Yoshino, Takehiro Murao, Hiroshi Fukushima, Tomoo Takatani
  • Patent number: 9164624
    Abstract: A light-receiving device 10 includes a plurality of light-receiving units 10A, 10B, and 10C, in which, in the element substrate 11A constituting the light-receiving unit 10A, the rear surface of a second terminal forming area 16Ac, upon which a connection pad PAc is formed, is bonded to the front surface of a cover glass 14B covering a plurality of light-receiving elements 12 constituting the light-receiving unit 10B, and in the element substrate 11C constituting the light-receiving unit 10C, the rear surface of a first terminal forming area 16Cb, upon which a connection pad PCb is formed, is bonded with the front surface of the cover glass 14B of the light-receiving unit 10B. As a result, an increase in manufacturing cost and a decrease in yield are mitigated so that it is possible to provide a light-receiving device upon which light-receiving elements are disposed continuously over a long distance at a high density, as well as an optical touch panel device provided with the same.
    Type: Grant
    Filed: June 6, 2011
    Date of Patent: October 20, 2015
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Seishi Kosegawa, Takehiro Murao, Toshiyuki Yoshimizu
  • Publication number: 20150277130
    Abstract: Disclosed is a stereoscopic display device that can reduce moiré that occurs due to light-shielding areas in the aperture of pixels. The stereoscopic display device includes a display panel and a parallax barrier. The display panel has a plurality of pixels and displays a stereoscopic image. In the parallax barrier, the direction in which transmissive and non-transmissive parts are alternately arranged is the first direction and the lengthwise direction of the non-transmissive parts is the second direction. There is a boundary that extends in the second direction between two pixels next to each other in the first direction. There are light-shielding areas in the aperture of each pixel. There is a space between the boundary and the light-shielding areas. Of two pixels next to each other in the second direction, the light-shielding areas in the aperture of one pixel are shifted in the first direction with respect to the light-shielding areas in the aperture of the other pixel.
    Type: Application
    Filed: October 10, 2013
    Publication date: October 1, 2015
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Takuto Yoshino, Takehiro Murao, Hiroshi Fukushima
  • Publication number: 20150249818
    Abstract: Provided is a stereoscopic display device capable of achieving good stereoscopic images with a low level of crosstalk in a wide area. A stereoscopic display device includes: a display panel; a switching liquid crystal panel arranged to overlap the display panel; a control section that controls the display panel and the switching liquid crystal panel; and a position sensor that obtains position information about a viewer and supplies the same to the control section. The display panel includes first pixel lines and second pixel lines that are arranged alternately in a vertical direction. The control section switches between a plurality of display modes including a tracking three-dimensional display mode.
    Type: Application
    Filed: September 27, 2013
    Publication date: September 3, 2015
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Takehiro Murao, Hiroshi Fukushima
  • Publication number: 20150237334
    Abstract: Provided is a stereoscopic display device via which a good stereoscopic image can be obtained with little crosstalk across a wide zone. A stereoscopic display device is provided with: a display panel that displays an image; a lens sheet, which is arranged in a superimposed manner on the display panel, and which separates an image displayed on the display panel into a right-eye image and a left-eye image in the horizontal direction; a control unit that controls the display panel; and a position sensor that acquires position information with respect to an observer and supplies the same to the control unit. The display panel includes first pixel rows and second pixel rows arranged alternately in a vertical direction. The control unit, according to the position information, causes either the first pixel rows or the second pixel rows to alternately display pixel data constituting the right-eye image and pixel data constituting the left-eye image in the horizontal direction.
    Type: Application
    Filed: September 24, 2013
    Publication date: August 20, 2015
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Takehiro Murao, Hiroshi Fukushima
  • Publication number: 20150009430
    Abstract: The objective is to provide a stereoscopic display device that is capable of preventing a malfunction of the touch panel while maintaining 3D capability. The device includes: a display panel (12); a switch liquid crystal panel (14); a touch panel (20); a driving circuit (16); and an RC circuit (18). The switch liquid crystal panel (14) is located on the front side of the display panel (12) and is capable of forming a parallax barrier (38). The touch panel (20) is located on the front side of the switch liquid crystal panel (14). The driving circuit (16) drives the switch liquid crystal panel (14) to form the parallax barrier (38). The RC circuit (18) is located between the switch liquid crystal panel (14) and the driving circuit (16). The driving circuit (16) drives the switch liquid crystal panel (14) using a voltage with an effective value of 3 volts or more.
    Type: Application
    Filed: February 7, 2013
    Publication date: January 8, 2015
    Inventors: Takuto Yoshino, Takehiro Murao, Hiroshi Fukushima, Tomoo Takatani
  • Publication number: 20140375914
    Abstract: The objective is to provide a stereoscopic display device that can be switched among 2D display mode, 3D display mode and mirror mode. The device includes: a display panel (12); a switch liquid crystal panel (14); an absorptive polarizer (16); and a reflective polarizer (22). The switch liquid crystal panel (14) is located closer to the viewer than the display panel (12) is. The absorptive polarizer (16) is located closer to the viewer than the switch liquid crystal panel (14) is. The reflective polarizer (22) is located between the display panel (12) and the switch liquid crystal panel (14). The reflective polarizer (22) has a transmission axis (L6) perpendicular to the transmission axis (L3) of the absorptive polarizer (16) and passes those components of light entering the reflective polarizer (22) that are parallel to the transmission axis (L6) while reflecting those components that are perpendicular to the transmission axis (L6).
    Type: Application
    Filed: December 21, 2012
    Publication date: December 25, 2014
    Inventors: Takehiro Murao, Ryoh Kikuchi, Takuto Yoshino, Hiroshi Fukushima, Tomoo Takatani
  • Publication number: 20140362315
    Abstract: The objective is to provide a stereoscopic display device that can be switched among 2D display mode, 3D display mode and mirror mode, where 2D display may be realized even while the device is staying in mirror mode. The device includes: a display panel (12); a switch liquid crystal panel (14); an absorptive polarizer (16); and a reflective polarizer (22). The switch liquid crystal panel is located closer to the viewer than the display panel is. The absorptive polarizer is located closer to the viewer than the switch liquid crystal panel is. The reflective polarizer is located between the display panel and the switch liquid crystal panel. The reflective polarizer passes those components of light entering the reflective polarizer that are parallel to the transmission axis (L6) while reflecting those components that are perpendicular to the transmission axis. At least one of the substrates (32, 34) includes a transparent region (58) capable of passing light from the display panel.
    Type: Application
    Filed: December 21, 2012
    Publication date: December 11, 2014
    Inventors: Takehiro Murao, Takuto Yoshino, Hiroshi Fukushima, Tomoo Takatani
  • Publication number: 20140347582
    Abstract: An objective is to provide a stereoscopic display device that can reduce moire occurring when the viewer is not at the optimum viewing position while maintaining the vertical degree of freedom. A parallax barrier (42) includes transparent portions (48) and light-shielding portions (46) arranged alternatingly. Supposing that a first direction is a direction in which the light-shielding portions (46) and the transparent portions (48) are arranged alternatingly and a second direction is a longitudinal direction of the light-shielding portions (46), a boundary portion (52) is present between two adjacent pixels (50) arranged in the first direction and extends in the second direction, and the edges (381, 382) of the light-shielding portions (46) disposed in the first direction have portions crossing a reference line (L) extending in the second direction and fluctuate in a specified cycle along the second direction.
    Type: Application
    Filed: November 26, 2012
    Publication date: November 27, 2014
    Inventors: Takehiro Murao, Takuto Yoshino, Hiroshi Fukushima, Tomoo Takatani
  • Patent number: 8823684
    Abstract: Disclosed are: a position detection system having improved flexibility in selection of line sensors; and others. In the position detection system (PM) of the present invention, a phosphor (11) which can excite invisible light (UV light) that is light emitted from an LED (23) is arranged on an optical path between the LED (23) and a light receiving element (26).
    Type: Grant
    Filed: June 29, 2010
    Date of Patent: September 2, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Atsuhito Murai, Takehiro Murao, Seishi Kosegawa, Yukihiko Nishiyama, Hideki Kitagawa
  • Publication number: 20140184962
    Abstract: The purpose of the present invention is to provide a vertically and horizontally positionable stereoscopic display device that can obtain an excellent stereoscopic display by reducing light leakage through areas (inter-line areas) between drive electrodes (36, 42) and auxiliary electrodes (38, 44) and improving light shielding properties of light shielding parts. A switching liquid crystal panel (14) provided in the stereoscopic display device of the present invention realizes a parallax barrier (48) in which transmission parts (52) and light shielding parts (50) are arrayed alternately. The switching liquid crystal panel (14) includes a pair of substrates (30, 32) on which drive electrodes (36, 42) and auxiliary electrodes (38, 44) are arranged alternately.
    Type: Application
    Filed: July 31, 2012
    Publication date: July 3, 2014
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Takehiro Murao, Takuto Yoshino, Hiroshi Fukushima, Tomoo Takatani
  • Publication number: 20140168549
    Abstract: Provided is a vertically and horizontally positionable stereoscopic display device that is capable of, while preventing the crosstalk ratio from deteriorating, increasing the brightness during 3D display, switching 2D display and 3D display without decreases in the resolution during 2D display, and achieving a switching response speed at the same level as that in the parallax barrier method. A switching liquid crystal panel (14) realizes a parallax barrier (48) in which transmission parts (52) and light shielding parts (50) are arrayed alternately. The switching liquid crystal panel includes a pair of substrates (30, 32). On the substrates, drive electrodes (36, 42) and auxiliary electrodes (38, 44) are arranged alternately. When the switching liquid crystal panel is viewed from the front, the drive electrodes and the auxiliary electrodes formed on one of the substrates are orthogonal to the drive electrodes and the auxiliary electrodes formed on the other substrate.
    Type: Application
    Filed: August 22, 2012
    Publication date: June 19, 2014
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Takehiro Murao, Takuto Yoshino, Hiroshi Fukushima, Tomoo Takatani
  • Publication number: 20140168548
    Abstract: Provide is a stereoscopic display device that is capable of, while preventing the crosstalk ratio from deteriorating, increasing the brightness during 3D display, switching 2D display and 3D display without decreases in the resolution, and achieving a switching response speed at the same level as that in the parallax barrier method.
    Type: Application
    Filed: July 27, 2012
    Publication date: June 19, 2014
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Takehiro Murao, Takuto Yoshino, Hiroshi Fukushima, Tomoo Takatani
  • Publication number: 20130293795
    Abstract: A liquid crystal display device includes: a main panel that displays images; a switch panel arranged to be opposed to the main panel, the switch panel being capable of switching a mode between a two-dimensional mode that causes an image displayed on the main panel to be viewed as a two-dimensional image and a three-dimensional mode that causes the image to be viewed stereoscopically; a luminance control section that changes a luminance of the main panel upon mode switching by the switch panel; and a vision correction unit that makes luminance changes in the main panel hardly visible on a viewing side upon mode switching by the switch panel.
    Type: Application
    Filed: December 16, 2011
    Publication date: November 7, 2013
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Takehiro Murao, Hiroshi Fukushima, Tomoo Takatani
  • Publication number: 20130201417
    Abstract: A display device 10 includes a liquid crystal panel 11 and a parallax barrier 12. The liquid crystal panel 11 includes pixels PX linearly arranged in at least one direction and light blocking sections 11f each arranged between adjacent pixels PX. The parallax barrier 12 faces the liquid crystal panel 11 and is configured to separate an image displayed on the pixels PX by parallax. The parallax barrier 12 includes barrier sections BA and barrier openings BO. The barrier sections BA are arranged in the arrangement direction of the pixels and configured to block light. The barrier openings BO are each arranged between adjacent barrier sections BA and allow the light to pass therethrough. Each barrier section BA has a dimension measured in the arrangement direction that satisfies Expression (1), in which Wb (?m) is the dimension of each barrier section, A (?m) is a dimension of each pixel, and B (?m) is a dimension of each light blocking section measured in the arrangement direction.
    Type: Application
    Filed: October 6, 2011
    Publication date: August 8, 2013
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Takehiro Murao, Hiroshi Fukushima, Takuto Yoshino, Tomoo Takatani
  • Patent number: 8477263
    Abstract: A liquid crystal display device including a plurality of pixels arranged in a matrix along a first direction and a second direction which are perpendicular to each other a TFT substrate, a counter substrate, a liquid crystal layer, a plurality of microlenses, and a backlight provided on a side of the plurality of microlenses which is opposite to the TFT substrate. The plurality of microlenses includes a plurality of lenticular lenses extending in the first direction, the plurality of lenticular lenses being arranged side by side along the second direction.
    Type: Grant
    Filed: March 30, 2009
    Date of Patent: July 2, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takehiro Murao, Naru Usukura, Seishi Kosegawa, Tadashi Nemoto, Toshiyuki Yoshimizu