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: 7978167
    Abstract: A display section of a portable phone includes a first polarizer, a switching panel section, a reflective polarizer, and a main panel section. The switching panel section has a liquid crystal layer including a plurality of regions having at least two different alignment directions. This makes it possible, by utilizing the difference in the alignment direction of the liquid crystal layer, to make the image difficult to observe by a sight-line from an oblique direction. Furthermore, it is also possible, by utilizing the mirror-surface displaying caused by the reflective polarizer, to make the image significantly difficult to observe.
    Type: Grant
    Filed: September 22, 2006
    Date of Patent: July 12, 2011
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Koji Yabuta, Hiroshi Fukushima, Akira Imai, Tomoo Takatani
  • Publication number: 20110102690
    Abstract: A liquid crystal display panel 1 for displaying non-identical images along non-identical lines of sight includes: a parallax barrier (2) having light-transmitting sections (21) and light-blocking sections (22) alternately arranged in a lattice manner with each of the light-transmitting sections (21) provided with a condenser lens (23) having a long axis parallel to a long side A of the light-transmitting section (21); and a back polarizing plate (4) and a front polarizing plate (5) disposed on a light incidence side and a light exit side, respectively, each of the polarizing plates (4, 5) having its absorption axis set in a parallel or orthogonal relationship with the long axis of the condenser lens (23). This provides: a liquid crystal display panel capable of presenting non-identical images along non-identical lines of sight with high contrast; and a liquid crystal display device including such a liquid crystal display panel.
    Type: Application
    Filed: April 9, 2009
    Publication date: May 5, 2011
    Inventors: Ryo Kikuchi, Hiroshi Fukushima, Tomoo Takatani
  • Patent number: 7898602
    Abstract: On the display surface side of a DV display apparatus which performs image separation via a parallax barrier, a normally-white TN liquid crystal section is arranged such that a viewing angle direction heads toward the passenger seat. In a case where display is performed for both the driver's seat and the passenger seat, a drive voltage of the TN liquid crystal section is switched off. In a case where display for the driver's seat is set to non-display and an image is displayed only for the passenger seat, a halftone voltage is applied as the drive voltage of the TN liquid crystal section. In the case where display for at least one display direction is set to non-display in a display apparatus which can display different images in plural display directions by using a common display screen, it is possible to prevent image light for other directions from leaking to the non-display direction.
    Type: Grant
    Filed: March 24, 2006
    Date of Patent: March 1, 2011
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Koji Yabuta, Hiroshi Fukushima, Tomoo Takatani
  • Patent number: 7868980
    Abstract: In a parallax barrier DV (Dual View) display apparatus, a TN (Twisted Nematic) liquid crystal display panel is adopted as a display device for display images. The TN liquid crystal display panel includes a pair of opposing substrates, a liquid crystal layer sandwiched therebetween, orientation films arranged to orient liquid crystal molecules constituting the liquid crystal layer, and electrodes arranged to independently apply electric fields to areas of the liquid crystal layer which correspond to respective pixels. The orientation films are oriented in such a manner that liquid crystal molecules in the aforesaid areas are oriented so that display directions of the pixels are parallel or substantially parallel to a viewing angle direction. This arrangement improves image separation capability in all display directions, in a DV (Dual View) display apparatus displaying different images in respective display directions, by a single display screen.
    Type: Grant
    Filed: March 23, 2006
    Date of Patent: January 11, 2011
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hiroshi Fukushima, Tomoo Takatani, Koji Yabuta
  • Patent number: 7868952
    Abstract: A parallax barrier device includes a pair of transparent-electrode substrates each provided with a transparent electrode. A barrier light-shielding part and a light-transmitting part are formed in a gap between the pair of transparent-electrode substrates. A liquid crystal layer is formed in the barrier light-shielding part. A resin layer having the property of transmitting light is formed in the light-transmitting part. The barrier light-shielding part separates light for a first image viewed from a first direction and light for a second image viewed from a second direction different from the first direction. The light-transmitting part transmits the light for the first image and the light for the second image.
    Type: Grant
    Filed: October 14, 2003
    Date of Patent: January 11, 2011
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hiroshi Fukushima, Tomoo Takatani, Masakazu Wada
  • Publication number: 20100328355
    Abstract: A display device is provided with a plurality of cold cathode tubes (light sources) (16a, 16b) according to the number of information display images that are simultaneously displayable in a plurality of display directions from a display surface, and a control section (4) for controlling the drive of the cold cathode tubes (16a, 16b). The control section (4) changes the light intensity of each, cold cathode tube (16a, 16b) based on the corresponding information display image.
    Type: Application
    Filed: May 24, 2007
    Publication date: December 30, 2010
    Inventors: Hiroshi Fukushima, Koji Yabuta, Tomoo Takatani, Akira Imai
  • Publication number: 20100321621
    Abstract: The present invention provides a thin-profile and light-weight display device capable of improving display qualities and suppressing incorrect operation.
    Type: Application
    Filed: September 3, 2008
    Publication date: December 23, 2010
    Inventors: Ryo Kikuchi, Hiroshi Fukushima, Tomoo Takatani
  • Patent number: 7834834
    Abstract: A portable phone has a main LCD and a SW-LCD, provided on a path of light to be transmitted by the main LCD, which electrically switches between (i) an image to be seen in a single image display mode and (ii) an image to be seen in a multiple image display mode. In the multiple image display mode, the display switch makes it possible that (a) the image displayed by the image display is seen from a front direction and (b) an image obtained by superimposing, onto the image displayed by the image display, a switching image formed by the display switch is seen from an oblique direction. The switching image is formed by providing, with at least one of a pair of transparent electrode films for applying a voltage to a liquid crystal layer, a patterning having an area larger than 50% of an area of a display screen.
    Type: Grant
    Filed: September 1, 2005
    Date of Patent: November 16, 2010
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Tomoo Takatani, Koji Yabuta, Hiroshi Fukushima
  • Publication number: 20100277657
    Abstract: A parallax barrier device includes a pair of transparent-electrode substrates each provided with a transparent electrode. A barrier light-shielding part and a light-transmitting part are formed in a gap between the pair of transparent-electrode substrates. A liquid crystal layer is formed in the barrier light-shielding part. A resin layer having the property of transmitting light is formed in the light-transmitting part. The barrier light-shielding part separates light for a first image viewed from a first direction and light for a second image viewed from a second direction different from the first direction. The light-transmitting part transmits the light for the first image and the light for the second image.
    Type: Application
    Filed: July 13, 2010
    Publication date: November 4, 2010
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Hiroshi Fukushima, Tomoo Takatani, Masakazu Wada
  • Publication number: 20100277684
    Abstract: The present invention provides a display device in which the adhesive for bonding the display panel and the substrate to each other is prevented from remaining as an uncured portion, and a method for production thereof. The present invention provides: a display device comprising a display panel, a substrate disposed on a display side, and an adhesive layer via which the display panel and the substrate are bonded to each other, wherein the adhesive layer contains a cationically polymerized resin; and the method for production thereof. The adhesive layer more preferably has a refractive index corresponding to that of a member adjacent to the adhesive layer.
    Type: Application
    Filed: July 10, 2008
    Publication date: November 4, 2010
    Inventors: Hiroshi Fukushima, Tomoo Takatani
  • Patent number: 7817106
    Abstract: A portable phone has a main LCD and a SW-LCD, provided on a path of light to be transmitted by the main LCD, which electrically switches between (i) an image to be seen in a single image display mode and (ii) an image to be seen in a multiple image display mode. Furthermore, a first polarization plate serving as a reflective polarization plate is provided between the SW-LCD and the main LCD, and a second polarization plate is provided on a front surface side of the SW-LCD. The SW-LCD has a liquid crystal layer to which a voltage is applied in the multiple image display mode. With this, an image displayed by an image display can be seen from a front direction. In addition, the image displayed by the image display means is blocked by the second polarization plate when the image is seen from the an oblique direction, and outside light from the oblique direction is reflected by the first polarization plate, so that a mirror surface display is carried out.
    Type: Grant
    Filed: September 9, 2005
    Date of Patent: October 19, 2010
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hiroshi Fukushima, Koji Yabuta, Tomoo Takatani
  • Patent number: 7764253
    Abstract: A portable phone has a main LCD and a SW-LCD, provided on a path of light to be transmitted by the main LCD, which electrically switches between (i) an image to be seen in a single image display mode and (ii) an image to be seen in a multiple image display mode. In the multiple image display mode, the display switch makes it possible that (a) the image displayed by the image display is seen from a front direction and (b) an image obtained by superimposing, onto the image displayed by the image display, a switching image formed by the display switch is seen from an oblique direction. The switching image is formed by providing, with at least one of a pair of transparent electrode films for applying a voltage to a liquid crystal layer, a patterning having an area larger than 50% of an area of a display screen.
    Type: Grant
    Filed: September 1, 2005
    Date of Patent: July 27, 2010
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Tomoo Takatani, Koji Yabuta, Hiroshi Fukushima
  • Publication number: 20100182686
    Abstract: In an image display device having a parallax barrier element, a bright display with a broad viewing range can be realized. The image display device according to the present invention includes: a display panel having a first group of pixels for displaying a first image and a second group of pixels for displaying a second image; and a parallax barrier element for separating display light emitted from the first group of pixels and display light emitted from the second group of pixels, the parallax barrier element including a plurality of light-shielding portions and a plurality of light-transmitting portions which are alternately positioned within the same plane. The parallax barrier element includes converging elements respectively provided for the plurality of light-transmitting portions.
    Type: Application
    Filed: September 6, 2007
    Publication date: July 22, 2010
    Inventors: Hiroshi Fukushima, Kashiba-shi Yabuta, Tomoo Takatani
  • Publication number: 20100149136
    Abstract: In a display device, when a first image is an absolute white image, a direction in which a luminance is maximum is regarded as a main viewing direction for the first image. A luminance Ld in the main viewing direction for the first image in cases where the first image is an absolute black image and other image is an absolute white image, and a luminance Lb in the main viewing direction for the first image in cases where the first image and the other image are absolute black images satisfy a relationship represented by Formula (1): (Ld?Lb)/Lb?2.5??(1). This makes it possible to realize a display device, which is capable of displaying different images to a plurality of different viewpoints and has an improved function of separating the images in the different display directions.
    Type: Application
    Filed: June 5, 2006
    Publication date: June 17, 2010
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Hiroshi Fukushima, Tomoo Takatani, Koji Yabuta, Yoshihide Koyama, Akira Imai
  • Publication number: 20100149459
    Abstract: A view angle control element capable of limiting a view angle without degrading image quality (front quality) when seen from a front side and a display device provided with the view angle control element are provided. A liquid crystal display device (1) includes a liquid crystal panel (10), and a view angle control film (20) that controls a view angle of the liquid crystal panel (10). The view angle control film (20) is a laminated film including at least a liquid crystal film (21) and a linearly polarizing plate (22). In the liquid crystal film (21), liquid crystal molecules are solidified while being aligned with major axes tilted in a predetermined azimuth angle direction from a normal direction of a film surface.
    Type: Application
    Filed: July 7, 2008
    Publication date: June 17, 2010
    Inventors: Koji Yabuta, Tomoo Takatani, Hiroshi Fukushima
  • Publication number: 20100091226
    Abstract: An ATM of the present invention includes a liquid crystal display panel having, between two transparent substrates, (i) an image forming layer including at least a liquid crystal layer and a pixel section in which RGB pixels are arranged in a matrix manner, and (ii) a plurality of barriers (16) for splitting a display image formed by the image forming layer into a plurality of images each having a specific viewing angle. The plurality of barriers are provided so as to face the image forming layer. The plurality of barriers (16) are extended in a horizontal direction (lateral direction) parallel to the surfaces of the transparent substrates, and provided at substantially regular intervals in a direction perpendicular to the horizontal direction, parallel to the surfaces of the transparent substrates (i.e., in a longitudinal direction).
    Type: Application
    Filed: October 12, 2007
    Publication date: April 15, 2010
    Inventors: Tomoo Takatani, Akira Imai, Hiroshi Fukushima, Koji Yabuta
  • Patent number: 7633586
    Abstract: A display is provided for switching between a narrow or private viewing mode and a wide or public viewing mode. The display comprises a display device which is controlled to provide display of a desired image or sequence of images. This is associated with a liquid crystal device having at least one liquid crystal layer whose molecules are switchable between a first state providing a first angular viewing range and a second state providing a second angular viewing range which is within and smaller than the first angular viewing range. With the molecules in the second state, the device at least partially blocks light propagating towards part of the first angular viewing range outside the second angular viewing range. The or each liquid crystal layer is in contact with at least one alignment surface, the or each of which comprises a uniform non-patterned alignment surface.
    Type: Grant
    Filed: April 19, 2005
    Date of Patent: December 15, 2009
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Robert Winlow, Zabbie J. Acosta, Martin D. Tillin, Paul Bonnett, Diana U. Kean, Grant Bourhill, Michel Sagardoyburu, Emma Jayne Walton, Koji Yabuta, Hiroshi Fukushima, Tomoo Takatani
  • Publication number: 20090303157
    Abstract: A display device (1a) of the present invention includes a displaying section (10), an image generating section (2) for generating an image signal, and a parallax barrier aperture array (17), distinction means (3) for judging whether cross talk of an image of another-pixels reaches a level at which the cross talk is perceived by a viewer of an image of self-pixels, and adjustment means (4) for adjusting the pixel signals of the another-pixels so as to eliminate the cross talk, in a case that the distinction means (3) judges the cross talk of the image of the another-pixels reaches to the perceivable level. This provides a display device and a vehicle equipped therewith, both of which display, on a single display screen, different images in a plurality of display directions and thus are capable of providing excellent display environments wherein the viewer of an image displayed in one display direction does not perceive cross talk of an image displayed in another direction.
    Type: Application
    Filed: June 16, 2006
    Publication date: December 10, 2009
    Inventors: Akira Imai, Tomoo Takatani, Hiroshi Fukushima, Koji Yabuta, Yoshihide Koyama
  • Publication number: 20090279005
    Abstract: In a parallax barrier DV (Dual View) display apparatus, a TN (Twisted Nematic) liquid crystal display panel is adopted as a display device for display images. The TN liquid crystal display panel includes a pair of opposing substrates, a liquid crystal layer sandwiched therebetween, orientation films arranged to orient liquid crystal molecules constituting the liquid crystal layer, and electrodes arranged to independently apply electric fields to areas of the liquid crystal layer which correspond to respective pixels. The orientation films are oriented in such a manner that liquid crystal molecules in the aforesaid areas are oriented so that display directions of the pixels are parallel or substantially parallel to a viewing angle direction. This arrangement improves image separation capability in all display directions, in a DV (Dual View) display apparatus displaying different images in respective display directions, by a single display screen.
    Type: Application
    Filed: March 23, 2006
    Publication date: November 12, 2009
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Hiroshi Fukushima, Tomoo Takatani, Koji Yabuta
  • Publication number: 20090267868
    Abstract: A display device includes a display screen including (i) a normal display area for normal display, and (ii) a DV display area for a DV display area. Pixel columns corresponding to the DV display area are provided in a fixed order in accordance with directions in which images are respectively displayed. Further, a barrier section is provided only for the DV display area so as to shield light, coming from the pixel columns corresponding to the DV display area, such that the images cannot be observed in a direction other than the display directions of the pixel columns. This makes it possible to provide a display device including a display screen provided with (i) a display area suitable for the normal display, and (ii) a display area allowing for the DV display.
    Type: Application
    Filed: March 2, 2006
    Publication date: October 29, 2009
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Tomoo Takatani, Koji Yabuta, Hiroshi Fukushima