Patents by Inventor Yuzo Hirayama

Yuzo Hirayama 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: 20120139911
    Abstract: A stereoscopic display device of an embodiment includes a display device having pixels developing either one color of red, green and blue. A vertical period of pixel rows comprising 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 an average value of pitches of the elemental images is larger than a width of pieces of the pixels.
    Type: Application
    Filed: January 25, 2012
    Publication date: June 7, 2012
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Tatsuo Saishu, Rieko Fukushima, Kazuki Taira, Yuzo Hirayama
  • Patent number: 8174465
    Abstract: It is made possible to prevent luminance falling and moire occurrence and change over between a two-dimensional image and a three-dimensional image partially. When displaying one of a three-dimensional image and a two-dimensional image on a background and displaying the other image in a window, a flag bit indicating whether the first and second electrodes overlap the window is set. Waveforms differing according to the flag bit are applied to the first and second electrodes as pulses applied to the opposed first and second electrodes of a variable polarization cell. As a result, three-dimensional image display is partially conducted in the window and two-dimensional image display is conducted in areas other than the window. Or two-dimensional image display is partially conducted in the window and three-dimensional image display is conducted in areas other than the window.
    Type: Grant
    Filed: September 15, 2009
    Date of Patent: May 8, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Ayako Takagi, Shunichi Numazaki, Hitoshi Kobayashi, Tatsuo Saishu, Yuzo Hirayama
  • Patent number: 8154587
    Abstract: A three-dimensional image display apparatus displays element images each composed of a set of parallax component images. An exit pupil array is located opposite the display surface. Exit pupils of the array correspond to the respective element images. The horizontal pitch of the exit pupils or an integral multiple of the horizontal pitch is set equal or slightly smaller than an integral multiple of the horizontal pitch of pixels. The parallax component images are oriented in different directions via the exit pupil. Principal beams from the parallax component images via the exit pupils are emitted substantially parallel to one another. The element image contains substantially the same parallax image component in two pixel areas in which two adjacent parallax image components are otherwise displayed. The same parallax image component is oriented in different directions via the corresponding exit pupil.
    Type: Grant
    Filed: March 19, 2008
    Date of Patent: April 10, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Rieko Fukushima, Tatsuo Saishu, Yuzo Hirayama
  • Publication number: 20120062556
    Abstract: According to an embodiment, a three-dimensional image display apparatus includes a display unit; a detecting unit configured to detect an observation position of an observer relative to the display unit; a determining unit configured to determine an amount of parallax of an input image signal to be reduced as an angle increases between a normal direction of a surface of the display unit and an observation direction based on the detected observation position or as a distance decreases between the surface of the display unit and the detected observation position; and a generating unit configured to generate a multi-view image to be displayed on the display unit on the basis of the determined amount of parallax.
    Type: Application
    Filed: August 22, 2011
    Publication date: March 15, 2012
    Inventors: Sumihiko Yamamoto, Rieko Fukushima, Yuzo Hirayama
  • Publication number: 20120050290
    Abstract: A three-dimensional image display apparatus according to an embodiment includes: a plane display device comprising pixels arranged in a matrix form; an optical plate configured to control light rays illuminated by the plane display device; and a drive circuit including an image processing unit to perform image processing on an input image signal and drive the plane display device based on an image signal processed by the image processing unit. The image processing unit is configured to perform at least one of rearrangement processing for three-dimensional image display on the image signal and filter processing on the image signal.
    Type: Application
    Filed: August 16, 2011
    Publication date: March 1, 2012
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Hitoshi Kobayashi, Yoshiyuki Kokojima, Yuzo Hirayama, Rieko Fukushima
  • Patent number: 8125513
    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: Grant
    Filed: October 27, 2010
    Date of Patent: February 28, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tatsuo Saishu, Rieko Fukushima, Kazuki Taira, Yuzo Hirayama
  • Patent number: 8106940
    Abstract: A stereoscopic image display apparatus includes a two-dimensional display device having a display surface formed of a plurality of pixels arranged in a matrix form, and an optical plate which is provided in front of the display surface of the two-dimensional display device, which includes a plurality of lenses arranged so as to be respectively associated with elemental images each including a plurality of pixels, and which controls light rays illuminated from the pixels. When at least two and less than three elemental images are illuminated in one parallax direction in the case where a position of a part or whole of a stereoscopic image is located on a side nearer a viewer than a position indicating a near-side limit value Zno or on a side farther from the viewer than a position indicating a far-side limit value Zfo, the two-dimensional display device displays black in an elemental image of one parallax in elemental images of every two parallaxes.
    Type: Grant
    Filed: August 31, 2007
    Date of Patent: January 31, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Ayako Takagi, Yuzo Hirayama, Sumihiko Yamamoto, Masahiro Sekine
  • Patent number: 8085294
    Abstract: A stereoscopic image display apparatus includes: a plane display device; a lens array provided in front of the display surface to distribute light rays from pixels of the display device to predetermined angles, and having a plurality of lenses arranged in a first direction; a variable polarizer provided between the plane display device and the lens array to polarize light rays from the pixels; and a double refraction prism array provided on an opposite side of the lens array from the display device, and including a plurality of double refraction prisms. Each of the double refraction prisms has a ridge in a second direction perpendicular to the first direction and arranged in the first direction with a pitch which is substantially twice a lens pitch in the lens array, and has double refraction in which a refractive index in a ridge direction is different from a refractive index in a direction perpendicular to the ridge direction.
    Type: Grant
    Filed: March 16, 2009
    Date of Patent: December 27, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Ayako Takagi, Masako Kashiwagi, Tatsuo Saishu, Yuzo Hirayama
  • Patent number: 8063931
    Abstract: A stereoscopic display apparatus includes a display having pixels arrayed in a longitudinal direction and a lateral direction to form a matrix, each pixel including sub-pixels with color components, and a control element opposed to the display and having linear openings extending in the longitudinal direction and arrayed in the lateral direction. The openings of any two sub-pixels adjacent in the lateral direction always overlap regardless of a position in the lateral direction. The sum of the longitudinal components of the opening ratios of s adjacent in the lateral direction is constant.
    Type: Grant
    Filed: April 20, 2007
    Date of Patent: November 22, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tatsuo Saishu, Rieko Fukushima, Kazuki Taira, Yuzo Hirayama
  • Publication number: 20110242289
    Abstract: Certain embodiments provide a display apparatus including: a selection unit configured to make a selection as to which image in images shot by which virtual cameras should be displayed on which subpixel based on the viewing position and the number of parallaxes which can be displayed; a generation unit configured to dispose the virtual camera on the coordinates of the virtual cameras in the CG space, shoot a drawing object in the CG space, and generate an elemental image based on a shot multiple viewpoint image and the selection result in the selection unit; a display unit configured to display a stereoscopic image based on the elemental image; and an optical plate configured to control light rays illuminated from the display unit to make it possible for the viewer to conduct stereoscopic viewing with a light ray interval which is wider than the shooting interval.
    Type: Application
    Filed: September 17, 2010
    Publication date: October 6, 2011
    Inventors: Rieko Fukushima, Yoshiyuki Kokojima, Sumihiko Yamamoto, Akira Morishita, Yuzo Hirayama
  • Publication number: 20110187948
    Abstract: Certain embodiments provide a display device a plurality of subpixels arranged in a first direction and a second direction perpendicular to the first direction to form a matrix, and each having an aperture provided with a color component; and an optical controller provided to be opposed to the display device having a plurality of rectilinear optical apertures extending in the second direction are arranged in the first direction. A shape pf the aperture in the subpixel is depending upon a condition that the apertures in the subpixels adjacent to each other in the first direction have a nonoverlapping region which is a nonoverlapping region in the second direction and a condition that an aperture ratio indicating a ratio of the aperture to the subpixel in length in the second direction is substantially constant in one line in the second direction irrespective of a position in the first direction.
    Type: Application
    Filed: September 16, 2010
    Publication date: August 4, 2011
    Inventors: Masako KASHIWAGI, Tatsuo Saishu, Rieko Fukushima, Yuzo Hirayama, Yoshiharu Momonoi, Ayako Takagi
  • Patent number: 7986320
    Abstract: A method of displaying 3D image on a 3D image displaying apparatus that produces a parallax at least in one direction, the method includes displaying by a displaying unit 2D information that is viewed as a 2D content by a viewer in such a manner that a 2D information angle (?_2D) formed with a virtual display surface of the 2D information and a real horizontal plane satisfies ?_D<?_2D?90°, wherein a display surface is arranged at an angle (?_D) formed with the real horizontal plane in a real space, where 0°??_D<90°.
    Type: Grant
    Filed: September 10, 2007
    Date of Patent: July 26, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Rieko Fukushima, Yuzo Hirayama, Miwako Doi
  • Patent number: 7978151
    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: Grant
    Filed: January 2, 2008
    Date of Patent: July 12, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kazuki Taira, Yuzo Hirayama, Tatsuo Saishu, Rieko Fukushima, Ayako Takagi
  • Patent number: 7944464
    Abstract: A three-dimensional image display device includes a two-dimensional image display screen having color filters in which each color is disposed on sub-pixels obtained by dividing one pixel in a vertical direction and same color is disposed on each column of sub-pixels; an optical plate having an exit pupil, the exit pupil being provided for making a viewing zone different for each pixel and having a longitudinal axis disposed as to be inclined from a vertical direction of the two-dimensional image display screen at a degree (?) (??0, ?45°<?<45°), the viewing zone being a region in which parallax information displayed on the two-dimensional image display screen is observed; and a viewing zone adjusting unit that adjusts the viewing zone by shifting the viewing zone in a horizontal direction of the two-dimensional image display screen by shifting the parallax information disposed on each pixel of the two-dimensional image display screen in the vertical direction by pixel.
    Type: Grant
    Filed: April 26, 2006
    Date of Patent: May 17, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Rieko Fukushima, Tatsuo Saishu, Shunichi Numazaki, Yuzo Hirayama, Kazuki Taira
  • Publication number: 20110043615
    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 1/2 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: October 27, 2010
    Publication date: February 24, 2011
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Tatsuo Saishu, Rieko Fukushima, Kazuki Taira, Yuzo Hirayama
  • Publication number: 20110032339
    Abstract: It is made possible to mitigate appearance of the strap-shaped disturbance image and shift to the side lobe naturally. The sense of incongruity for an image viewed in a transitional zone is reduced by performing interpolation processing between parallax information pieces displayed on pixels associated with adjacent exit pupils.
    Type: Application
    Filed: February 27, 2009
    Publication date: February 10, 2011
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yuzo Hirayama, Yoshiyuki Kokojima, Hitoshi Kobayashi, Rieko Fukushima
  • Patent number: 7834903
    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: Grant
    Filed: September 8, 2004
    Date of Patent: November 16, 2010
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tatsuo Saishu, Rieko Fukushima, Kazuki Taira, Yuzo Hirayama
  • Patent number: 7830601
    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: Grant
    Filed: September 15, 2004
    Date of Patent: November 9, 2010
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Ayako Takagi, Kazuki Taira, Yuzo Hirayama, Rieko Fukushima, Tatsuo Saishu
  • Patent number: 7787008
    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 arctan (1/n) when n is a natural number which is different from multiples of 3.
    Type: Grant
    Filed: February 9, 2005
    Date of Patent: August 31, 2010
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Rieko Fukushima, Tatsuo Saishu, Kazuki Taira, Yuzo Hirayama
  • Patent number: 7777950
    Abstract: It is made possible to provide a stereoscopic image display apparatus capable of preventing the stereoscopic display characteristics from being degraded even if the locus of light rays between the lens and the two-dimensional display device becomes long. A stereoscopic image display apparatus includes: a plane display device having a display face formed of a plurality of pixels arranged in a matrix form; an optical plate comprising a plurality of lenses which are arranged in front of the display face of the plane display device and which have a uniaxial double refractive material inserted therein, and controlling light rays from the pixels; and a sheet polarizer provided between the plane display device and the optical plate to align a polarization direction of light ray. In the double refractive material, a maximum primary axis of refractive index is parallel to ridgelines of the lenses and is inclined in a direction opposed to a viewer.
    Type: Grant
    Filed: March 19, 2008
    Date of Patent: August 17, 2010
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Ayako Takagi, Yuzo Hirayama