Patents by Inventor Tatsuo Saishu

Tatsuo Saishu 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: 20060215528
    Abstract: A method of holographic recording and reproduction includes recording to the holographic recording medium a wavelength variation reference pattern which is recorded as a hologram at a wavelength of the recording beam, recording to the holographic recording medium a page data pattern as a hologram at the wavelength of the recording beam, detecting the wavelength variation between the recording beam and the reproducing beam based on the size of an image for wavelength variation reference obtained by reproducing the wavelength variation reference pattern at a wavelength of the reproducing beam, and reproducing the page data pattern using the reproducing beam with a wavelength controlled based on the detected wavelength variation.
    Type: Application
    Filed: January 24, 2006
    Publication date: September 28, 2006
    Inventors: Akiko Hirao, Yuji Kubota, Kazuki Matsumoto, Naru Ikeda, Yoshinori Honguh, Yuzo Hirayama, Tatsuo Saishu, Junichi Akiyama
  • Patent number: 7079098
    Abstract: An image display system produces a color image by arranging a color shutter capable of time-divisionally switching a plurality of colors to be displayed, in front of a monochrome image display. This image display system comprises: a self-luminous image display part for time-divisionally displaying monochrome images corresponding to three primary colors; and a color display part for time-divisionally coloring and outputting the monochrome images which formed on the side of the light outgoing surface of the self-luminous image display part and which correspond to the three primary colors.
    Type: Grant
    Filed: July 2, 2002
    Date of Patent: July 18, 2006
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kazuki Taira, Tatsuo Saishu, Kouhei Suzuki, Hirotaka Murata, Takashi Nishimura, Masaaki Tamatani
  • Patent number: 7050031
    Abstract: A display includes a ferroelectric liquid crystal material having an asymmetric polarity response property, a section which applies an image signal to a pixel of the material for every two fields forming one frame, and a controller which reverses the polarity of the signal in one frame period. Particularly, the controller is configured that the polarity of the signal is reversed in a selected one of first and second manners, the first manner initiating a signal amplitude change from a polarity in which a larger response of the material is obtainable, the second manner initiating a signal amplitude change from a polarity in which a smaller response of the material is obtainable, and the selected manner being smaller in the total of brightness deviation generated in a frame immediately after the change for each of predetermined brightness transitions.
    Type: Grant
    Filed: January 6, 2004
    Date of Patent: May 23, 2006
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tatsuo Saishu, Hajime Yamaguchi, Rieko Fukushima, Rei Hasegawa, Kohki Takatoh
  • Publication number: 20060066718
    Abstract: An apparatus for generating a parallax image to be used for a display of a three-dimensional image on a three-dimensional integral imaging display includes an image signal acquiring unit, an image signal assigning unit, and a parallax image generator. The image signal acquiring unit acquires a plurality of image signals by picking up an image of an image object from a plurality of different parallax directions. The image signal assigning unit assigns an output order of the plurality of image signal so that the plurality of image signals are arranged in a reverse parallax direction order to an order of beam directions of the three-dimensional integral imaging display. The parallax image generator generates a parallax image from the plurality of image signals to which an output order is assigned by the image signal assigning unit.
    Type: Application
    Filed: March 23, 2005
    Publication date: March 30, 2006
    Inventors: Shingo Yanagawa, Yasunobu Yamauchi, Kazuki Taira, Rieko Fukushima, Tatsuo Saishu, Yuzo Hirayama
  • Publication number: 20060012554
    Abstract: Disclosed is a method for driving an active matrix type liquid crystal display device including a first electrode, a second electrode, and a liquid crystal layer interposed between the first and the second electrodes, and the liquid crystal layer having a larger polarization when a voltage of a first polarity is applied to the first electrode against the second electrode than that when a voltage of a second polarity different from the first polarity is applied to the first electrode against the second electrode, the method comprising dividing a frame into a first field and a second field, applying a first voltage of the first polarity to the first electrode during the first field, generating a second voltage from the first voltage by changing its polarity, a magnitude of the second voltage being modified by an amount of ?V (?V?0) based on a magnitude of the first voltage in a direction of the first polarity when the first voltage is not zero, and applying the second voltage to the first electrode during the s
    Type: Application
    Filed: September 22, 2005
    Publication date: January 19, 2006
    Inventors: Tatsuo Saishu, Haruhiko Okumura, Kohki Takatoh, Hajime Yamaguchi, Rei Hasegawa, Hitoshi Kobayashi, Rieko Fukushima
  • Patent number: 6975297
    Abstract: Disclosed is a method for driving an active matrix type liquid crystal display device including a first electrode, a second electrode, and a liquid crystal layer interposed between the first and the second electrodes, and the liquid crystal layer having a larger polarization when a voltage of a first polarity is applied to the first electrode against the second electrode than that when a voltage of a second polarity different from the first polarity is applied to the first electrode against the second electrode, the method comprising dividing a frame into a first field and a second field, applying a first voltage of the first polarity to the first electrode during the first field, generating a second voltage from the first voltage by changing its polarity, a magnitude of the second voltage being modified by an amount of ?V (?V?0) based on a magnitude of the first voltage in a direction of the first polarity when the first voltage is not zero, and applying the second voltage to the first electrode during the s
    Type: Grant
    Filed: June 21, 2002
    Date of Patent: December 13, 2005
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tatsuo Saishu, Haruhiko Okumura, Kohki Takatoh, Hajime Yamaguchi, Rei Hasegawa, Hitoshi Kobayahi, Rieko Fukushima
  • Publication number: 20050270366
    Abstract: The present invention makes it possible to rapidly obtain a two-dimensional image which is not discontinuous and does not include distortion from three-dimensional image display data. When a two-dimensional image is displayed, a viewing point within a viewing zone is assumed, and a parallax image displayed on pixels positioned at a position where a line connecting the viewing point and an exit pupil, and the display unit cross each other or positioned in the vicinity thereof in a state that a three-dimensional image is displayed is developed and displayed within a corresponding elemental image including the pixels.
    Type: Application
    Filed: March 2, 2005
    Publication date: December 8, 2005
    Inventors: Rieko Fukushima, Hitoshi Kobayashi, Yuzo Hirayama, Kazuki Taira, Tatsuo Saishu, Yasunobu Yamauchi, Masahiro Sekine
  • Publication number: 20050264651
    Abstract: In a II system display apparatus, in a normal display mode, a parallax component image is divided into pieces corresponding to respective columns for a parallax interleaved image. The component image is obtained by subjecting a subject to perspective projection in a vertical direction and to orthographic projection in a horizontal direction. In a compressed and emphasized display mode, the component image is divided into pieces corresponding to respective columns. The component image is obtained by subjecting the subject to perspective projection in both vertical and horizontal directions. In a multiview compatible mode, the component image is divided into pieces corresponding to respective columns so that the same piece is provided for a plurality of adjacent columns. The component image is obtained by subjecting the subject to perspective projection in both vertical and horizontal directions.
    Type: Application
    Filed: May 20, 2005
    Publication date: December 1, 2005
    Inventors: Tatsuo Saishu, Yuzo Hirayama, Kazuki Taira, Rieko Fukushima
  • Publication number: 20050264881
    Abstract: A three-dimensional display apparatus is provided with an optical element including optical apertures arranged opposite a display module and in association with the parallax images. The optical apertures cause the parallax images to be displayed in a near-side region closer to an observer, while causing a three-dimensional image to be displayed in a far-side region located opposite the observer with respect to the display module. When a smooth three-dimensional image is to be displayed in the near-side region, the optical gap between the optical element and the display surface is set longer than a reference distance depending on the position of the three-dimensional image. In order to display a smooth three-dimensional image in the far-side region, the observer sets the optical gap shorter than the reference distance depending on the position of the three-dimensional image.
    Type: Application
    Filed: May 24, 2005
    Publication date: December 1, 2005
    Inventors: Ayako Takagi, Tatsuo Saishu, Kazuki Taira, Yuzo Hirayama
  • Publication number: 20050259323
    Abstract: It is possible to provide a three-dimensional image display device which can improved a final resolution balance and can prevent display blocking. A three-dimensional image display device includes: a two-dimensional image display device where pixels constituting a pixel group displaying an elemental image are arranged in a matrix shape; and an optical plate which has exit pupils corresponding to the pixel group and controls light rays from the pixels of the pixel group, wherein the exit pupils in the optical plate are constituted so as to be continued in an approximately vertical direction, and an angle formed between a direction in which the exist pupils are continued and a column direction of a pixel arrangement in the two-dimensional image display device is given by arc tan (1/n) when n is a natural number which is different from multiples of 3.
    Type: Application
    Filed: February 9, 2005
    Publication date: November 24, 2005
    Inventors: Rieko Fukushima, Tatsuo Saishu, Kazuki Taira, Yuzo Hirayama
  • Patent number: 6961043
    Abstract: A display includes a ferroelectric liquid crystal material having an asymmetric polarity response property, a section which applies an image signal to a pixel of the material for every two fields forming one frame, and a controller which reverses the polarity of the signal in one frame period. Particularly, the controller is configured that the polarity of the signal is reversed in a selected one of first and second manners, the first manner initiating a signal amplitude change from a polarity in which a larger response of the material is obtainable, the second manner initiating a signal amplitude change from a polarity in which a smaller response of the material is obtainable, and the selected manner being smaller in the total of brightness deviation generated in a frame immediately after the change for each of predetermined brightness transitions.
    Type: Grant
    Filed: August 31, 2001
    Date of Patent: November 1, 2005
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tatsuo Saishu, Hajime Yamaguchi, Rieko Fukushima, Rei Hasegawa, Kohki Takatoh
  • Publication number: 20050105179
    Abstract: A stereoscopic image producing method can produce a stereoscopic image efficiently. The stereoscopic image producing method includes inputting a plurality of parallax images with pixel data including information pieces about the three primary colors, which are produced from different viewpoints, and, based upon information about arrangement of color pixel dots constituting a pixel of a display screen which displays a two-dimensional image thereon, composing some pieces of the three primary color information pieces in each of the parallax images and allocating the three primary color information pieces for different ones of the parallax images to the color pixel dots adjacent to each other in a screen horizontal direction on the display screen, where a stereoscopic image including a plurality of different parallax image information pieces in a horizontal direction in a space in which the stereoscopic image is displayed is produced.
    Type: Application
    Filed: September 29, 2004
    Publication date: May 19, 2005
    Inventors: Kazuki Taira, Yuzo Hirayama, Tatsuo Saishu, Rieko Fukushima, Yasunobu Yamauchi, Shingo Yanagawa
  • Publication number: 20050099689
    Abstract: A three-dimensional image display device includes a display unit having pixels arranged in a form of a matrix, the pixels forming pixel groups configured to display element images, and a mask having windows corresponding to the pixel groups. Preferably, relative positions of the pixel groups to the windows change cyclically.
    Type: Application
    Filed: September 17, 2004
    Publication date: May 12, 2005
    Inventors: Reiko Fukushima, Tatsuo Saishu, Kazuki Taira, Yuzo Hirayama
  • Publication number: 20050083400
    Abstract: A three-dimensional image display device includes a display portion having pixels arranged in the form of a matrix in a planar display surface to have fixed horizontal and vertical pitches, a light ray control portion having first optical apertures arranged in front of the display portion to have a first pitch in a horizontal direction which limit light rays in the horizontal direction and second optical apertures to have a second pitch in a vertical direction which converge the light rays at a certain view distance, and a display drive portion which gives element images generated based on parallel projected images to pixel groups along the horizontal direction and gives image segments obtained by interleaving perspective projected images in the vertical direction. Preferably, the first pitch is equal to an integer multiple of the horizontal pitch of the pixels, and the second pitch is smaller than the vertical pitch.
    Type: Application
    Filed: September 3, 2004
    Publication date: April 21, 2005
    Inventors: Yuzo Hirayama, Rieko Fukushima, Tatsuo Saishu, Kazuki Taira
  • Publication number: 20050083246
    Abstract: It is made possible to satisfy such a condition that moire or color moire is suppressed and a fast image processing is made easy and such a condition that sufficient image quality can be obtained both at a flat image display time and at a stereoscopic image display time simultaneously. A vertical period of pixel rows having the pixels arranged in one row in a lateral direction is three times a lateral period of the pixels, the pixels developing red, green and blue are alternately arranged in a lateral direction in the same row, the pixels in one row of two rows adjacent in a vertical direction are arranged such that lateral positions thereof are shifted to the pixels in the other row by ½ of the lateral period of the pixels, the pixels in rows adjacent in the same column through one row interposed therebetween are the pixels developing different colors of red, green and blue, and a pitch of the elemental images is equal to a width of 18n (n=1, 2, 3 . . .
    Type: Application
    Filed: September 8, 2004
    Publication date: April 21, 2005
    Inventors: Tatsuo Saishu, Rieko Fukushima, Kazuki Taira, Yuzo Hirayama
  • Publication number: 20050083288
    Abstract: A display includes a ferroelectric liquid crystal material having an asymmetric polarity response property, a section which applies an image signal to a pixel of the material for every two fields forming one frame, and a controller which reverses the polarity of the signal in one frame period. Particularly, the controller is configured that the polarity of the signal is reversed in a selected one of first and second manners, the first manner initiating a signal amplitude change from a polarity in which a larger response of the material is obtainable, the second manner initiating a signal amplitude change from a polarity in which a smaller response of the material is obtainable, and the selected manner being smaller in the total of brightness deviation generated in a frame immediately after the change for each of predetermined brightness transitions.
    Type: Application
    Filed: November 8, 2004
    Publication date: April 21, 2005
    Inventors: Tatsuo Saishu, Hajime Yamaguchi, Rieko Fukushima, Rei Hasegawa, Kohki Takatoh
  • Publication number: 20050057807
    Abstract: The embodiment is to make it possible to increase a resolution obtained when a character or a two-dimensional image is displayed. A stereoscopic image display device is provided with a two-dimensional image display device having a plurality of pixels arranged within a display plane; and a ray control section which is provided in front of or behind the display plane and has a plurality of opening portions or a plurality of lenses arranged side by side, for controlling rays from the pixels, a distance z from the ray control section to a two-dimensional character or a two-dimensional image display position satisfying relationships of 0<z<L×D/(1+D)/2 in a projection region and 0<z<L×D/(1?D)/2 in a depth region, wherein L represents a viewing distance, Ip represents a pitch of the opening portions or the lenses, 2? represents a viewing area angle, pp represents the pitch of the pixels, and D is expressed as D = ( l p ) 2 2 ? Lp p ? tan ? ( ? ) .
    Type: Application
    Filed: September 15, 2004
    Publication date: March 17, 2005
    Inventors: Ayako Takagi, Kazuki Taira, Yuzo Hirayama, Rieko Fukushima, Tatsuo Saishu
  • Publication number: 20040252374
    Abstract: In a one-dimensional IP (vertical disparity discarding system), it is made possible to obtain a perspective projection image with no distortion or reduced distortion. A stereoscopic display device is provided with a display device including a display plane in which pixels are arranged flatly in a matrix shape; and a parallax barrier including a plurality of apertures or a plurality of lenses and being configured to control directions of rays from the pixels such that a horizontal disparity is included but a vertical disparity is not included.
    Type: Application
    Filed: March 26, 2004
    Publication date: December 16, 2004
    Inventors: Tatsuo Saishu, Yuzo Hirayama
  • Patent number: 6825823
    Abstract: An image display system produces a color image by arranging a color shutter capable of time-divisionally switching a plurality of colors to be displayed, in front of a monochrome image display. This image display system comprises: a self-luminous image display part for time-divisionally displaying monochrome images corresponding to three primary colors; and a color display part for time-divisionally coloring and outputting the monochrome images which formed on the side of the light outgoing surface of the self-luminous image display part and which correspond to the three primary colors.
    Type: Grant
    Filed: April 2, 1999
    Date of Patent: November 30, 2004
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kazuki Taira, Tatsuo Saishu, Kouhei Suzuki, Hirotaka Murata, Takashi Nishimura, Masaaki Tamatani
  • Publication number: 20040222945
    Abstract: A three-dimensional image display apparatus includes an image display configured to output image light which arrays a plurality of pixels and has polarization, a lens array arranged in front of the image display, configured to function as lens at light which has a 1st polarization direction, and not to function as lens at light which has a 2nd polarization direction differed from the 1st polarization direction, and a birefringent phase modulator placed between the image display and the lens array and configured to rotate a polarization plane of the image light.
    Type: Application
    Filed: February 6, 2004
    Publication date: November 11, 2004
    Inventors: Kazuki Taira, Yuzo Hirayama, Tatsuo Saishu, Rieko Fukushima, Ayako Takagi