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).

  • Publication number: 20090225002
    Abstract: A multiplex image display device prevents onscreen input buttons from appearing at the same positions. A “command area” refers to an area of the display screen where the user can enter a command for manipulating one of images being simultaneously displayed on the single display section for individual viewing from different directions. In the multiplex image display device, the positioning control section controls the positioning of the command areas so that a command area for one of the images being simultaneously displayed on the display section is displayed at a different (i.e., non-overlapping) position on the display section from a command area for another one of such images.
    Type: Application
    Filed: March 7, 2006
    Publication date: September 10, 2009
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Akira Imai, Tomoo Takatani, Yoshihide Koyama, Hiroshi Fukushima, Koji Yabuta
  • Patent number: 7583327
    Abstract: A liquid crystal layer, a color filter, a thick resin layer, and a parallax barrier layer are provided between two transparent substrates. The separation between the color filter and the parallax barrier layer is adjusted using the thick resin layer to a short distance suitable for dual image displays.
    Type: Grant
    Filed: March 10, 2005
    Date of Patent: September 1, 2009
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Tomoo Takatani
  • Patent number: 7551239
    Abstract: A viewing angle control element of the present invention contains transparent regions 23 having a transmittance T1 and light shield regions 24 capable of switching between a transmittance T2 and a transmittance T3 which is less than T1 and T2 according to an external signal. Each of the transparent regions 23 and the light shield regions 24 is positioned opposite to one of pixels. Displays are produced at or close to the original brightness of the image display element in wide viewing angle mode, whereas in narrow viewing angle mode, light transmission is limited to achieve narrow viewing angles. This is in contrast with other viewing angle control elements which produce displays at or close to the original brightness of the image display element in narrow viewing angle mode, whereas in wide viewing angle mode, light is diffused or otherwise modified to achieve wide viewing angles.
    Type: Grant
    Filed: February 1, 2005
    Date of Patent: June 23, 2009
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hiroshi Fukushima, Koji Yabuta, Tomoo Takatani, Masakazu Wada
  • Publication number: 20090085830
    Abstract: A dual-view liquid crystal display device (1) includes: screen scaling-down sections (32, 42) for forming child screens (11a, 12a), i.e., screens obtained by scaling down parent screens (11, 12); and screen combining sections (33, 34) for combining the child screens (12a, 11a) with the parent screens (11, 12), respectively. This makes it possible to know the content of one screen while viewing the other screen.
    Type: Application
    Filed: January 18, 2007
    Publication date: April 2, 2009
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Akira Imai, Tomoo Takatani, Hiroshi Fukushima
  • Patent number: 7486350
    Abstract: A display device includes: a main LCD; a SW LCD, disposed on an optical path of light transmitting through the main LCD, for electrically switching a visible image between a single image display mode and a multiple image display mode; a first polarizer; and a second polarizer. The major axis direction of liquid crystal molecules in the liquid crystal layer of the SW LCD is always substantially parallel to the polarization direction of light after transmission through the first polarizer when projected from the normal to the substrates. At least some of the liquid crystal molecules in the liquid crystal layer are controlled in terms of alignment direction so that the major axis direction of the liquid crystal molecules is substantially parallel to the substrates in the single image display mode and tilted from the substrates in the multiple image display mode.
    Type: Grant
    Filed: December 23, 2005
    Date of Patent: February 3, 2009
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Koji Yabuta, Hiroshi Fukushima, Tomoo Takatani
  • Publication number: 20090015732
    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: Application
    Filed: March 24, 2006
    Publication date: January 15, 2009
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Koji Yabuta, Hiroshi Fukushima, Tomoo Takatani
  • Publication number: 20080316366
    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: Application
    Filed: September 1, 2005
    Publication date: December 25, 2008
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Tomoo Takatani, Koji Yabuta, Hiroshi Fukushima
  • Publication number: 20080316198
    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 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: Application
    Filed: September 9, 2005
    Publication date: December 25, 2008
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Hiroshi Fukushima, Koji Yabuta, Tomoo Takatani
  • Patent number: 7468764
    Abstract: A first optical-path changing layer is provided, on a front-face side of a rear-face side transparent substrate including a light source on one side face thereof. The first optical-path changing layer has a refractive index substantially equal to that of the transparent substrate, and includes predetermined protrusions and predetermined depressions. Further, a low refractive-index layer is provided on a front-face side of the first optical-path changing layer. The low refractive-index layer is in contact with the protrusions and the depressions of the first optical-path changing layer, and has a smaller refractive index than the refractive index of the first optical-path changing layer. Further, a second optical-path changing layer is provided on a rear-face side of the rear-face side transparent substrate. The second optical-path changing layer includes predetermined protrusions and predetermined depressions.
    Type: Grant
    Filed: March 15, 2005
    Date of Patent: December 23, 2008
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hiroshi Fukushima, Koji Yabuta, Tomoo Takatani, Masakazu Wada
  • Publication number: 20080084471
    Abstract: In a SW-LCD, an orienting film is divided into first and second regions having different directions of orientation, and a transparent electrode film is also patterned so as to be divided into regions respectively corresponding to the first and second regions. In the first region, a viewing angle in right and left directions is controlled. In the second region, a viewing angle in upper and lower directions is controlled. With this, a display device is realized which makes it possible to switch between a wide viewing angle display mode and a narrow viewing angle display mode, which controls a viewing angle in both upper and lower directions and in right and left directions in the narrow viewing angle display mode, and which makes it possible to prevent an image from being seen obliquely from the right and left directions and from the upper and lower directions.
    Type: Application
    Filed: October 3, 2005
    Publication date: April 10, 2008
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Koji Yabuta, Hiroshi Fukushima, Tomoo Takatani
  • Publication number: 20080055221
    Abstract: A first transparent electrode film, which is a component of a SW-LCD for viewing angle control, is used as a touch panel. When a contacting object contacts the surface of the first transparent electrode film, a position detector detects currents flowing from plural parts of the first transparent electrode film so as to detect the contacting position of the contacting object, with reference to the detection result. With this, it is possible to provide a built-in touch sensor display device which is thin, lightweight, and low-cost, a viewing angle control device, and an electronic device.
    Type: Application
    Filed: September 12, 2005
    Publication date: March 6, 2008
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Koji Yabuta, Hiroshi Fukushima, Tomoo Takatani, Akira Imai
  • Publication number: 20080036714
    Abstract: A control section of a portable phone controls a display on a main display section with a viewing angle that is variable. The control section includes: a viewing-angle obtaining section to obtain viewing-angle information about the viewing-angle of the main display section; and a viewing-angle display control section to control an image display section of the main display section to display the viewing-angle information obtained by the viewing-angle obtaining section. The viewing-angle information is obtainable from a viewing-angle control section. The viewing-angle control section controls a viewing-angle changing section. The viewing-angle changing section changes the viewing angle. It is possible to obtain the viewing-angle information as a result that an operation section conducts an operation to change the viewing angle, and/or as a result that an application executing section executes a predetermined application.
    Type: Application
    Filed: August 29, 2005
    Publication date: February 14, 2008
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Akira Imai, Tomoo Takatani, Koji Yabuta, Hiroshi Fukushima
  • Publication number: 20070291024
    Abstract: A control section of a portable phone controls a viewing-angle changing section that changes a viewing angle of an image display section. The control section controls the viewing angle of the image display section on the basis of a status of use of various devices. Specifically, the control section includes: a device-in-use detecting section to detect use of the devices; a storage section to store a device/viewing-angle matching table containing a correspondence relationship between a device to be used and a viewing angle; a viewing-angle retrieving section to retrieve, from the table, a viewing angle for the device detected being in use by the device-in-use detecting section; and a viewing-angle control section to control the viewing-angle changing section on the basis of the viewing angle retrieved by the viewing-angle retrieving section. The foregoing allows the viewing angle to be controlled automatically on the basis of the status of use, with a few settings.
    Type: Application
    Filed: August 29, 2005
    Publication date: December 20, 2007
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Akira Imai, Tomoo Takatani, Koji Yabuta, Hiroshi Fukushima
  • Publication number: 20070242185
    Abstract: A first optical-path changing layer is provided, on a front-face side of a rear-face side transparent substrate including a light source on one side face thereof. The first optical-path changing layer has a refractive index substantially equal to that of the transparent substrate, and includes predetermined protrusions and predetermined depressions. Further, a low refractive-index layer is provided on a front-face side of the first optical-path changing layer. The low refractive-index layer is in contact with the protrusions and the depressions of the first optical-path changing layer, and has a smaller refractive index than the refractive index of the first optical-path changing layer. Further, a second optical-path changing layer is provided on a rear-face side of the rear-face side transparent substrate. The second optical-path changing layer includes predetermined protrusions and predetermined depressions.
    Type: Application
    Filed: March 15, 2005
    Publication date: October 18, 2007
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Hiroshi Fukushima, Koji Yabuta, Tomoo Takatani, Masakazu Wada
  • Publication number: 20070146578
    Abstract: A display device includes: a main LCD; a SW LCD, disposed on an optical path of light transmitting through the main LCD, for electrically switching a visible image between a single image display mode and a multiple image display mode; a first polarizer; and a second polarizer. The major axis direction of liquid crystal molecules in the liquid crystal layer of the SW LCD is always substantially parallel to the polarization direction of light after transmission through the first polarizer when projected from the normal to the substrates. At least some of the liquid crystal molecules in the liquid crystal layer are controlled in terms of alignment direction so that the major axis direction of the liquid crystal molecules is substantially parallel to the substrates in the single image display mode and tilted from the substrates in the multiple image display mode.
    Type: Application
    Filed: December 23, 2005
    Publication date: June 28, 2007
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Koji Yabuta, Hiroshi Fukushima, Tomoo Takatani
  • Publication number: 20070070004
    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: Application
    Filed: September 22, 2006
    Publication date: March 29, 2007
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Koji Yabuta, Hiroshi Fukushima, Akira Imai, Tomoo Takatani
  • Publication number: 20060098281
    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: October 14, 2003
    Publication date: May 11, 2006
    Inventors: Hiroshi Fukushima, Tomoo Takatani, Masakazu Wada
  • Publication number: 20050243265
    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: Application
    Filed: April 19, 2005
    Publication date: November 3, 2005
    Inventors: Robert Winlow, Zabbie Acosta, Martin Tillin, Paul Bonnett, Diana Kean, Grant Bourhill, Michel Sagardoyburu, Emma Walton, Koji Yabuta, Hiroshi Fukushima, Tomoo Takatani
  • Publication number: 20050200781
    Abstract: A liquid crystal layer, a color filter, a thick resin layer, and a parallax barrier layer are provided between two transparent substrates. The separation between the color filter and the parallax barrier layer is adjusted using the thick resin layer to a short distance suitable for dual image displays.
    Type: Application
    Filed: March 10, 2005
    Publication date: September 15, 2005
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Tomoo Takatani
  • Publication number: 20050174529
    Abstract: A viewing angle control element of the present invention contains transparent regions 23 having a transmittance T1 and light shield regions 24 capable of switching between a transmittance T2 and a transmittance T3 which is less than T1 and T2 according to an external signal. Each of the transparent regions 23 and the light shield regions 24 is positioned opposite to one of pixels. Displays are produced at or close to the original brightness of the image display element in wide viewing angle mode, whereas in narrow viewing angle mode, light transmission is limited to achieve narrow viewing angles. This is in contrast with other viewing angle control elements which produce displays at or close to the original brightness of the image display element in narrow viewing angle mode, whereas in wide viewing angle mode, light is diffused or otherwise modified to achieve wide viewing angles.
    Type: Application
    Filed: February 1, 2005
    Publication date: August 11, 2005
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Hiroshi Fukushima, Koji Yabuta, Tomoo Takatani, Masakazu Wada