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).
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Patent number: 8063931Abstract: 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: GrantFiled: April 20, 2007Date of Patent: November 22, 2011Assignee: Kabushiki Kaisha ToshibaInventors: Tatsuo Saishu, Rieko Fukushima, Kazuki Taira, Yuzo Hirayama
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Patent number: 8040370Abstract: It is possible to prevent an image processing amount from increasing and obtain excellent display characteristics. A stereoscopic image display apparatus includes: a flat display device having approximately square pixels arranged on a flat display plane in a square manner: and an optical plate which is disposed in front of the display device and has optical apertures which extend linearly in the same direction as a diagonal line of a rectangle obtained by connecting n pieces of the pixels vertically, for controlling directions of light rays from the pixels. The flat display plane of the flat display device are divided to elemental images, each corresponding to each of the optical apertures in the optical plate, and an average value of pitches of the elemental images is larger than m (m=1,2,3 . . .Type: GrantFiled: March 24, 2006Date of Patent: October 18, 2011Assignee: Kabushiki Kaisha ToshibaInventor: Tatsuo Saishu
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Publication number: 20110242091Abstract: An image processing circuit includes a first memory, a second memory, a write unit and a read unit. The first and second memories alternately store sub pixels of an input image including a plurality of parallax images corresponding to different view point directions. The write unit writes the sub pixels to one of the first and second memories. The read unit reads the sub pixels as an output image from the other of the first and second memories. Each of the first and second memories stores sub pixels for a plurality of successive lines. While the write unit writes the sub pixels of the input image to one of the first and second memories, the read unit reads the sub pixels of the output image from the other of the first and second memories. The first and the second memories are alternately changed.Type: ApplicationFiled: September 10, 2010Publication date: October 6, 2011Inventors: Hitoshi Kobayashi, Tatsuo Saishu, Yoshiyuki Kokojima
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Publication number: 20110211142Abstract: A stereoscopic display apparatus includes a liquid-crystal display device that has display pixels arranged in a matrix and displays an elemental image array formed from a plurality of field images on the display pixels to render stereoscopic display, a parallax creating unit provided on the front surface or the rear surface of the liquid-crystal display device, and a directional backlight that emits light through the liquid-crystal display device then through the parallax creating unit and switches directions of the thus-emitted light among a plurality of directions according to a display of the field image is disclosed.Type: ApplicationFiled: May 4, 2011Publication date: September 1, 2011Applicant: Kabushiki Kaisha ToshibaInventors: Masako Kashiwagi, Tatsuo Saishu, Rieko Fukushima
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Publication number: 20110187948Abstract: 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: ApplicationFiled: September 16, 2010Publication date: August 4, 2011Inventors: Masako KASHIWAGI, Tatsuo Saishu, Rieko Fukushima, Yuzo Hirayama, Yoshiharu Momonoi, Ayako Takagi
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Patent number: 7978151Abstract: 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: GrantFiled: January 2, 2008Date of Patent: July 12, 2011Assignee: Kabushiki Kaisha ToshibaInventors: Kazuki Taira, Yuzo Hirayama, Tatsuo Saishu, Rieko Fukushima, Ayako Takagi
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Patent number: 7954967Abstract: A stereoscopic display apparatus includes a liquid-crystal display device that has display pixels arranged in a matrix and displays an elemental image array formed from a plurality of field images on the display pixels to render stereoscopic display, a parallax creating unit provided on the front surface or the rear surface of the liquid-crystal display device, and a directional backlight that emits light through the liquid-crystal display device then through the parallax creating unit and switches directions of the thus-emitted light among a plurality of directions according to a display of the field image is disclosed.Type: GrantFiled: August 21, 2008Date of Patent: June 7, 2011Assignee: Kabushiki Kaisha ToshibaInventors: Masako Kashiwagi, Tatsuo Saishu, Rieko Fukushima
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Patent number: 7944464Abstract: 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: GrantFiled: April 26, 2006Date of Patent: May 17, 2011Assignee: Kabushiki Kaisha ToshibaInventors: Rieko Fukushima, Tatsuo Saishu, Shunichi Numazaki, Yuzo Hirayama, Kazuki Taira
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Publication number: 20110043615Abstract: 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: ApplicationFiled: October 27, 2010Publication date: February 24, 2011Applicant: Kabushiki Kaisha ToshibaInventors: Tatsuo Saishu, Rieko Fukushima, Kazuki Taira, Yuzo Hirayama
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Patent number: 7834903Abstract: 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: GrantFiled: September 8, 2004Date of Patent: November 16, 2010Assignee: Kabushiki Kaisha ToshibaInventors: Tatsuo Saishu, Rieko Fukushima, Kazuki Taira, Yuzo Hirayama
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Patent number: 7834996Abstract: An optical plate having an exit pupil array or a lens array aligned at a predetermined pitch is disposed at the front of a display. A test pattern is supplied to the display to light a pixel corresponding to the predetermined pitch. A first optical element transmits a light from an inspection position of the optical plate. A second optical element coaxially disposed on the first optical element, focuses the light from the first optical element. An image from the light focused at the second optical element is obtained. A three-dimensional position at the inspection position of the optical plate relative to the display or a predetermined period of the optical plate is calculated from a position and a period of luminance distribution of the image, and a distance between the optical plate and the first optical element. Whether the three-dimensional position or the predetermined period is within a threshold is inspected.Type: GrantFiled: December 31, 2008Date of Patent: November 16, 2010Assignee: Kabushiki Kaisha ToshibaInventors: Yoshiharu Momonoi, Kazuki Taira, Tatsuo Saishu
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Patent number: 7830601Abstract: 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: GrantFiled: September 15, 2004Date of Patent: November 9, 2010Assignee: Kabushiki Kaisha ToshibaInventors: Ayako Takagi, Kazuki Taira, Yuzo Hirayama, Rieko Fukushima, Tatsuo Saishu
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Patent number: 7830579Abstract: Mediums that are arranged opposite to an elemental-image display unit, that form two lens arrays having different principal planes together with substrates, and that switches a polarization direction of incident light corresponding to applied voltage, thereby making lens effect of either one of the lens arrays effective are included. By controlling the polarization direction synchronizing with a display timing of images to be displayed on the elemental-image display unit, the lens array to be effective is switched at each display timing, and images having different near or far direction are alternately displayed on the elemental-image display unit.Type: GrantFiled: March 17, 2009Date of Patent: November 9, 2010Assignee: Kabushiki Kaisha ToshibaInventors: Tatsuo Saishu, Masako Kashiwagi, Ayako Takagi, Kazuki Taira
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Publication number: 20100238276Abstract: An elemental image display has a pixel plane on which pixels are aligned with a matrix shape. A lens array has a plurality of birefringence lens aligned with an array shape. Each birefringence lens has an isotropy. A plurality of electrodes is placed between the elemental image display and the lens array. Each electrode is differently connected to a power supply line. A first electrode substrate has a part of the plurality of electrodes. A second electrode substrate has other part of the plurality of electrodes. A longitudinal direction of electrodes of the other part is perpendicular to a longitudinal direction of electrodes of the part. A medium is placed between the first electrode substrate and the second electrode substrate. The medium expresses anisotropy of a refractive index by applying a voltage from the power supply line.Type: ApplicationFiled: March 23, 2010Publication date: September 23, 2010Inventors: Ayako TAKAGI, Tatsuo Saishu, Kazuki Taira
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Patent number: 7787008Abstract: 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: GrantFiled: February 9, 2005Date of Patent: August 31, 2010Assignee: Kabushiki Kaisha ToshibaInventors: Rieko Fukushima, Tatsuo Saishu, Kazuki Taira, Yuzo Hirayama
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Patent number: 7786953Abstract: In a three-dimensional image display apparatus in which a lenticular plate and shutter device are arranged in front of a display module, one frame image is displayed using n field images. To display each field image, a shutter device is driven to substantially simultaneously open a group of shutter elements for every n lenses along a horizontal direction. Thus, light beams are transmitted from lenses through the shutter elements to an observing zone. The group of the opened shutter elements is sequentially changed in response to n switchings of the field. The switching of shutter elements is synchronized with the pixels on the display surface sequentially rewritten from top to bottom by linear sequential driving during the switching of the field. The elemental image is projected on the viewing zone via the lenses and the shutter elements.Type: GrantFiled: March 22, 2006Date of Patent: August 31, 2010Assignee: Kabushiki Kaisha ToshibaInventor: Tatsuo Saishu
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Patent number: 7742046Abstract: A two-dimensional image can be displayed in a desired position, a desired aspect ratio of the display image can be maintained, and such an elemental image array as to maximize an interpolating effect can be produced. A producing method of an elemental image array for three-dimensional image display includes: converting the resolution of the two-dimensional image into substantially the same resolution of a three-dimensional image display device; obtaining multipoint images by shifting the position to sample the two-dimensional image after the resolution conversion at regular intervals in the horizontal direction; and rearranging the multipoint images according to the positional relationship between exit pupils and projecting directions.Type: GrantFiled: August 30, 2006Date of Patent: June 22, 2010Assignee: Kabushiki Kaisha ToshibaInventors: Rieko Fukushima, Ayako Takagi, Tatsuo Saishu, Kazuki Taira, Yuzo Hirayama
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Patent number: 7736005Abstract: 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: GrantFiled: September 6, 2007Date of Patent: June 15, 2010Assignee: Kabushiki Kaisha ToshibaInventors: Tatsuo Saishu, Yuzo Hirayama
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Patent number: 7726816Abstract: 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: GrantFiled: May 9, 2007Date of Patent: June 1, 2010Assignee: Kabushiki Kaisha ToshibaInventors: Tatsuo Saishu, Yuzo Hirayama
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Publication number: 20100073347Abstract: 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: ApplicationFiled: September 15, 2009Publication date: March 25, 2010Inventors: Ayako TAKAGI, Shunichi Numazaki, Hitoshi Kobayashi, Tatsuo Saishu, Yuzo Hirayama