Patents by Inventor Tomoo Takatani

Tomoo Takatani 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: 9753292
    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: Grant
    Filed: July 27, 2012
    Date of Patent: September 5, 2017
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Takehiro Murao, Takuto Yoshino, Hiroshi Fukushima, Tomoo Takatani
  • Patent number: 9599832
    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: Grant
    Filed: December 21, 2012
    Date of Patent: March 21, 2017
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takehiro Murao, Ryoh Kikuchi, Takuto Yoshino, Hiroshi Fukushima, Tomoo Takatani
  • Patent number: 9588351
    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: Grant
    Filed: November 26, 2012
    Date of Patent: March 7, 2017
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Takehiro Murao, Takuto Yoshino, Hiroshi Fukushima, Tomoo Takatani
  • Patent number: 9459462
    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: Grant
    Filed: December 21, 2012
    Date of Patent: October 4, 2016
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takehiro Murao, Takuto Yoshino, Hiroshi Fukushima, Tomoo Takatani
  • 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: 9105224
    Abstract: A stereoscopic display device includes: a parallax barrier in which light transmission parts that transmit light and light shielding parts that block light are formed alternately, and a display panel that displays a stereoscopic image. A plurality of pixels for displaying the stereoscopic image are formed on the display panel. Each pixel includes a plurality of color forming subpixels that contribute to the color formation of the stereoscopic image, and a contrasting subpixel that contributes to the contrast of the stereoscopic image. In each pixel, the contrasting subpixel is positioned at both ends of the pixel in a direction in which the light transmission parts and the light shielding parts are arranged alternately. In each pixel that overlaps the light shielding part when the display panel is viewed from front, the contrasting subpixel is positioned at both ends of the light shielding part.
    Type: Grant
    Filed: November 17, 2011
    Date of Patent: August 11, 2015
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Makoto Eguchi, Shinya Yamasaki, Akira Imai, Tomoo Takatani
  • Patent number: 9041872
    Abstract: Provided is a switching liquid crystal panel and a display device that have novel structures that are capable of preventing luminous regions from appearing in the light transmitting parts, in the vicinities of boundaries thereof with the light shielding parts. The switching liquid crystal panel includes a pair of substrates (26a, 26b) having a twisted nematic type liquid crystal layer (24) interposed therebetween, and a plurality of light shield forming electrodes (30) that are formed on at least one of the pair of the substrates (26a, 26b) and that form light shielding parts (40) of a parallax barrier (16) in cooperation with a counter electrode (34) when a voltage is applied, the counter electrode (34) being is opposed to the light shield forming electrodes (30) with the liquid crystal layer (24) interposed therebetween.
    Type: Grant
    Filed: July 25, 2011
    Date of Patent: May 26, 2015
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Ryoh Kikuchi, Hiroshi Fukushima, Tomoo Takatani, Kimitaka Nomura
  • Publication number: 20150068674
    Abstract: A method of manufacturing the liquid crystal display device (display device) includes: a step of coating a liquid adhesive material on at least one of opposing surfaces of a liquid crystal display panel (display panel) that displays images or a parallax barrier panel (function panel) to be stacked onto the liquid crystal display panel; a step of attaching the liquid crystal display panel to the parallax barrier panel through an adhesive material; and a step of partial curing in which an overlapping portion of the adhesive material overlapping in a plan view an outer edge portion of at least one of the liquid crystal display panel and the parallax barrier panel is cured.
    Type: Application
    Filed: April 19, 2013
    Publication date: March 12, 2015
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Kenichiroh Tsuchida, Takayuki Yamada, Tomoo Takatani, 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
  • Publication number: 20140335316
    Abstract: The present invention provides a display panel with a front plate and a display device which exhibit improved display qualities with suppressed air bubbles and display unevenness in and around a display region, and sufficiently suppress peeling of the front plate from the display panel.
    Type: Application
    Filed: December 5, 2012
    Publication date: November 13, 2014
    Inventors: Hiroshi Fukushima, Tomoo Takatani
  • Patent number: 8884922
    Abstract: A display device includes a touch panel and displays stereoscopic images with reducing its thickness and weight. The display device includes a liquid crystal display panel 20, a switching liquid crystal panel 30 and a touch panel 50. The switching liquid crystal panel 30 is provided on a display surface side of the display panel 20 and switches a display mode between two-dimensional display and three-dimensional display. The touch panel 50 is provided on the display surface side of the display panel 20. The touch panel 50 and the switching liquid crystal panel 30 commonly include one common board 32 and are configured as one component. A touch panel transparent electrode 51 and a switching liquid crystal panel transparent electrode 33 are provided on the common board 32. The switching liquid crystal panel transparent electrode 33 applies a voltage to liquid crystals of the switching liquid crystal panel 30.
    Type: Grant
    Filed: February 16, 2011
    Date of Patent: November 11, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hiroshi Hamada, Akira Imai, Tomoo Takatani
  • Patent number: 8872990
    Abstract: An arrangement with a shared polarizer disposed between two panels capable of displaying a 3D image using parallax barrier techniques is provided, where the quality of a displayed 3D image is prevented from decreasing due to the left-right imbalance in contrast ratio. The arrangement includes: a main panel; a switch panel for displaying a slit image serving as a parallax barrier; a polarizer located closer to the viewed side of the main panel; a polarizer located between the main panel and the switch panel; and a polarizer located closer to the side of the switch panel opposite the side closer to the main panel. The direction of rubbing for one of the alignment films of the switch panel is at an angle relative to the absorption axis of one of the polarizers such that a contrast ratio within a view range of the left and right eyes is equal to or higher than a reference value, the contrast ratio being measured on a visual line corresponding to the transmission axis of one of the polarizers.
    Type: Grant
    Filed: July 11, 2011
    Date of Patent: October 28, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kimitaka Nomura, Tomoo Takatani, Hiroshi Fukushima, Ryoh Kikuchi
  • Publication number: 20140307188
    Abstract: In a display device in which a switching panel that displays a stripe image is provided on the viewing side of a main panel so that a three-dimensional image can be displayed, gap unevenness of the switching panel is made hardly visible, whereby appearance quality of the display device is improved. A liquid crystal display device includes: a main panel (2) that displays an image; a switching panel (3) that is provided on a viewing side of the main panel (2) and displays a stripe image as a parallax barrier so as to cause the image displayed on the main panel (2) to be viewed stereoscopically; a polarizing plate (4) that is provided on a viewing side of the switching panel (3) and converts incident light into linearly polarized light; and a retarder (7) that is provided between the switching panel (3) and the polarizing plate (4), converts linearly polarized light into circularly polarized light, and converts circularly polarized light into linearly polarized light.
    Type: Application
    Filed: October 25, 2012
    Publication date: October 16, 2014
    Inventors: Ryoh Kikuchi, Tomoo Takatani, Hiroshi Fukushima
  • Patent number: 8847908
    Abstract: Disclosed is a display device (50a) that includes a display panel (30) for displaying an image, a touch panel (40) of electrostatic capacitance coupling type that is disposed so as to face the display panel (30), and an adhesive layer (45) that is disposed between the display panel (30) and the touch panel (40) and that bonds the display panel (30) and the touch panel (40) to each other. The adhesive layer (45) is provided with a shield pattern (46a) that is configured to prevent electrical noise generated in the display panel (30) from affecting the touch panel (40). According to this configuration, it becomes possible to prevent the increase in the device thickness, and to prevent a decrease in the position detection accuracy of the touch panel.
    Type: Grant
    Filed: January 17, 2011
    Date of Patent: September 30, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hiroshi Fukushima, Tomoo Takatani
  • 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