With Alternating Polarization Patents (Class 348/57)
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Patent number: 7187420Abstract: An image display system comprises a first liquid crystal projector which projects a counterclockwise-rotating, circularly polarized light beam to form an image containing specific visual information on a screen and a second liquid crystal projector which projects a clockwise-rotating, circularly polarized light beam to form a white image on the same screen. When viewed with the naked eye, a combination of the two images projected on the screen appears totally white. A viewer wearing a dedicated viewing device equipped with an optical filter which allows counterclockwise-rotating, circularly polarized light to pass through can selectively see the image projected by the first liquid crystal projector.Type: GrantFiled: August 5, 2003Date of Patent: March 6, 2007Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Yoshiharu Hirakata, Jun Koyama, Satoshi Teramoto
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Patent number: 7164529Abstract: A polarizing eyeglass device is disclosed which achieves improvement in compatibility and also in convenience in use when it is used to view an image displayed on an image display screen of a stereoscopic image display apparatus. The polarizing eyeglass device includes a polarized light separation means for separating particular polarized light. The polarized light separation means includes a first viewing region to be used for viewing with one of the left and right eyes and a second viewing region to be used for viewing with the other eye. A first polarization direction changing means is adhered to a first face of the polarized light separation means in the first viewing region. A second polarization direction changing is adhered to a second face opposite to the first face of the polarized light separation means in the second viewing region.Type: GrantFiled: September 5, 2003Date of Patent: January 16, 2007Assignee: Sony CorporationInventors: Hidehiko Sekizawa, Seiji Sato
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Patent number: 7148895Abstract: The present inventions provide a system and a method for facilitating various visual analyses of individual players and team data that is most appropriate for the purpose, while also allowing analyzed data and results to be saved. A time-series data processing device according to the present inventions includes an image-pick up unit for image-picking up a specific object, a data processing unit for generating a data list indicating, in time series, a temporal transition of a position and a state of the object image-picked up by the image-picking unit, with respect to a time, an animating unit for animating the transition of the position and the state of the object in accordance with the data list, and a display unit for displaying at least one of the data list generated by the data processing unit and the image animated by the animating unit.Type: GrantFiled: July 30, 2001Date of Patent: December 12, 2006Assignee: Scale Inc.Inventors: Kentaro Konishi, Masaki Usui, Tatsuya Okahara
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Patent number: 7123213Abstract: In a structure in which six active matrix regions 103 to 108 are integrated on one glass substrate, horizontal scanning control circuits 101 and 102 are commonly disposed for the respective active matrix regions 103 to 105 and 106 to 108. Then, the horizontal scanning control circuits 101 and 102 are operated at different timings, and images formed by the active matrix regions 103 to 105 and 106 to 108 are synthesized and projected. With this operation, the horizontal scanning frequency required for one horizontal scanning control circuit can be made half of the horizontal scanning frequency of the display screen.Type: GrantFiled: April 2, 2002Date of Patent: October 17, 2006Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Yoshiharu Hirakata, Jun Koyama, Satoshi Teramoto
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Patent number: 7077524Abstract: A color projection display device may include SLMs or other panels. One embodiment includes a device for displaying a color image including first and second sequences of temporally-integrateable primary color image components, the device also includes first (209) ans second (206) SLM panels (604, 606), first and second driving circuitry, and first through fourth polarizing beam splitters.Type: GrantFiled: August 4, 2005Date of Patent: July 18, 2006Assignee: Genoa Color Technologies LTDInventor: Shmuel Roth
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Patent number: 6996267Abstract: A visual image system is constructed as including: a three-dimensional visual image reproducer for transmitting a three-dimensional video signal; a parallax quantity detecting section for detecting a parallax quantity in the three-dimensional video signal from the three-dimensional visual image reproducer; a fatigue measure estimating section for estimating the degree of fatigue based on the detected parallax quantity and outputting an image switching signal correspondingly to a fatigue measure estimating quantity; a 3D/2D image switching section for providing an output by switching between three-dimensional and two-dimensional images based on the image switching signal; and an image display section for displaying a three-dimensional image or a two-dimensional image. The visual image system thereby fulfills the capability of suitably controlling the degree of three-dimensionality of stereoscopic images by inferring from the inputted video signal the degree of effects likely to be produced on the observer.Type: GrantFiled: July 3, 2003Date of Patent: February 7, 2006Assignee: Olympus Optical Co., Ltd.Inventor: Seiichiro Tabata
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Patent number: 6985168Abstract: An intelligent system and process for producing and displaying stereoscopically-multiplexed images of either real or synthetic 3-D objects, for use in realistic stereoscopic viewing thereof. The system comprises a subsystem for acquiring parameters specifying the viewing process of a viewer positioned relative to a display surface associated with a stereoscopic display subsystem. A computer-based subsystem is provided for producing stereoscopically-multiplexed images of either the real or synthetic 3-D objects, using the acquired parameters. The stereoscopically-multiplexed images are on the display surface, for use in realistic stereoscopic viewing of either the real or synthetic 3-D objects, by the viewer.Type: GrantFiled: April 25, 2003Date of Patent: January 10, 2006Assignee: Reveo, Inc.Inventors: David C. Swift, Sadeg M. Faris
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Patent number: 6975345Abstract: A polarizing modulator for use in an electronic stereoscopic display system having a sequentially scanning display includes a plurality of liquid crystal segments arranged contiguously in a direction of the sequential scan. The liquid crystal material used in each segment has its phase shift tuned to eliminate the perception of a visible line between segments. In a preferred embodiment, the phase shift is tuned by applying a bias voltage to the liquid crystal in its low state.Type: GrantFiled: March 27, 1998Date of Patent: December 13, 2005Assignee: StereoGraphics CorporationInventors: Lenny Lipton, Jeffrey James Hanlon
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Patent number: 6833952Abstract: A stereoscopic display apparatus 20 is employed in combination with an image transmission section 10. A case 1 includes a half-mirror 3, a visual field lens 4 and polarizers 22L, 22R therein, and an observation port 23 with a hood is defined in the case 1. A band 25 to be worn on a viewer's head is disposed in the exterior of the case 1. Both of the polarizers 22L and 22R are so designed as to display the stereoscopic images for the right and left eyes on the basis of data transmitted from the image transmission section 10, respectively, and the image lights are guided to the viewer's eyes through the half-mirror 3 and the visual field lens 4. The stereoscopic display apparatus 20 is of the head mount type that guides the images for the right and left eyes projected onto one display screen which is formed of the half-mirror 3 to the right and left eyes.Type: GrantFiled: July 17, 2001Date of Patent: December 21, 2004Assignee: Scalar CorporationInventor: Masao Yamamoto
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Patent number: 6831678Abstract: A video display for displaying a large image to an observer, comprising a screen for displaying patterns, the screen being formed of a plurality of separate areas each capable of receiving a segment of a pattern the segments collectively forming a complete frame of a pattern; projection means for projecting a segment of a pattern to each separate area of the screen in sequence; means for receiving each segment of a pattern and forming a complete frame; and means for illuminating the screen with collimated light to display a large area display.Type: GrantFiled: December 16, 1999Date of Patent: December 14, 2004Assignee: Holographic Imaging LLCInventor: Adrian R Travis
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Patent number: 6796657Abstract: A projection type display apparatus including an illumination optical system for emitting a light flux, a decomposition optical system for decomposing the light flux into color lights of red, green and blue, liquid crystal light valves for the colors for receiving the decomposed color lights, a synthesis optical system for synthesizing the image lights of the colors from the liquid crystal light valves, and a projection optical system for projecting the synthesized image lights to a screen. A filter is disposed at one of positions opposing to each other across the center of the light flux between the white light source and the decomposition optical system and attenuates or cuts off light of a wavelength region different from that of light which passes the other of the positions.Type: GrantFiled: December 27, 2002Date of Patent: September 28, 2004Assignee: Sony CorporationInventors: Makoto Shinoda, Kenji Sugihara
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Patent number: 6791599Abstract: An infrared ray receiving module receives an infrared signal (transmitted by an image display device) generated on the basis of a signal representing switching between right and left eye images. An input signal type automatic judging unit and a field frequency detecting and L/R distinguishing unit acquire data relating to shutter timing of a left eye liquid crystal and a right eye liquid crystal in liquid crystal shutter glasses from the received infrared signal. An operation field frequency determining unit generates decision data relating to shutter timing to be fed to the liquid crystal shutter glasses on the basis of predetermined conditions from the data relating to shutter timing newly obtained in succession, and holds the generated decision data. A liquid crystal driving pulse generating unit can cause the liquid crystal shutter glasses to perform a shutter operation using the held decision data when no decision data is generated because the predetermined conditions are not satisfied.Type: GrantFiled: September 16, 1998Date of Patent: September 14, 2004Assignee: Sanyo Electric Co., Ltd.Inventors: Seiji Okada, Yukio Mori, Haruhiko Murata
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Publication number: 20040145655Abstract: To provide a stereoscopic video image display apparatus in which right and left-eye video images are processed and displayed by a same signal processing circuit.Type: ApplicationFiled: December 2, 2003Publication date: July 29, 2004Inventor: Seijiro Tomita
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Patent number: 6703988Abstract: A display system or monitor arrangement for stereoscopic displaying of images includes a pair of displays for providing respective left eye and right eye images and arranged in perpendicular intersecting planes, a beam splitter for combining the images from the displays in a common light path, and a means to discriminate between respective images to present the respective left and right eye images to the eyes of a viewer for viewing. Image discriminating functions may be obtained using plane polarized light characteristics and/or circular polarized light characteristics. A package arrangement retains the display a system components for storage or use; and a cubical mount structure may provide alignment and positioning of respective parts of the display system. Display methods for displaying stereoscopic images in a common light path are included.Type: GrantFiled: July 7, 2000Date of Patent: March 9, 2004Assignee: Fergason Patent Properties, LLCInventor: James L. Fergason
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Publication number: 20040008251Abstract: The present invention enables liquid crystal display devices, note-book personal computers, or the like to display stereoscopic images by installing an image splitting means and comprises a display panel displaying images taken from a plurality of viewpoints, image splitting means installed to the display panel removably and including an image splitting panel which splits image light from the display panel into stereo pairs of images. The image splitting means comprises an installing means for installing the image splitting means to the display panel removably and an adjusting means for positioning spatially the image splitting means and the display panel.Type: ApplicationFiled: March 28, 2003Publication date: January 15, 2004Inventors: Ken Mashitani, Goro Hamagishi, Takahisa Andou, Satoshi Takemoto, Masahiro Higashino, Nobutake Kawamori
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Patent number: 6650306Abstract: A device for displaying images only to an authorized user includes a display device configured to display the images. The display device includes a backlight for generating incident light of mixed polarization, a first polarization rotator, and a first polarizer disposed between the backlight and the first polarization rotator. An optical shutter device is configured to view the displayed images. The optical shutter device includes a second polarization rotator and a second polarizer. The first and second polarization rotators are synchronously rotated while displaying the images so that the image are only perceived by the authorized user viewing the display device through the optical shutter device.Type: GrantFiled: August 6, 2001Date of Patent: November 18, 2003Assignee: Mitsubishi Electric Research Laboratories, Inc.Inventors: William S. Yerazunis, Darren L. Leigh
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Patent number: 6624935Abstract: An imaging system for producing a stereoscopic image of an object is provided. The imaging system includes a camera for receiving an image of the object, a single-axis optical system disposed between the object and the camera, and an image blocking element disposed between the object and the camera. The image blocking element is activatable to alternately produce a left image and a right image, and is adjustable in a direction perpendicular to the optical axis of the optical system such that the image blocking element is capable of being centered on the aperture (i.e., the entrance pupil, exit pupil, or aperture stop) of the optical system.Type: GrantFiled: March 29, 2001Date of Patent: September 23, 2003Assignee: Karl Store Imaging, Inc.Inventors: Michael Weissman, David Chatenever, Thomas J. Anhalt, Daniel Mattsson-Boze
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Patent number: 6614927Abstract: A visual image system is constructed as including: a three-dimensional visual image reproducer for transmitting a three-dimensional video signal; a parallax quantity detecting section for detecting a parallax quantity in the three-dimensional video signal from the three-dimensional visual image reproducer; a fatigue measure estimating section for estimating the degree of fatigue based on the detected parallax quantity and outputting an image switching signal correspondingly to a fatigue measure estimating quantity; a 3D/2D image switching section for providing an output by switching between three-dimensional and two-dimensional images based on the image switching signal; and an image display section for displaying a three-dimensional image or a two-dimensional image. The visual image system thereby fulfills the capability of suitably controlling the degree of three-dimensionality of stereoscopic images by inferring from the inputted video signal the degree of effects likely to be produced on the observer.Type: GrantFiled: June 2, 1999Date of Patent: September 2, 2003Assignee: Olympus Optical Co., Ltd.Inventor: Seiichiro Tabata
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Patent number: 6593959Abstract: A stereoscopic image display apparatus for displaying a three dimensional image on a screen of a display panel comprises a three dimensional video signal processor for converting an analog three dimensional video signal to a digital three dimensional video signal, and a micropolarizer attached to the display panel. The micropolarizer is composed of a plurality of first polarizing regions having a first polarizing direction and a plurality of second polarizing regions having a second polarizing direction perpendicular to the first polarizing direction. The first and second polarizing regions are alternately arranged with each other in the form of a matrix.Type: GrantFiled: April 15, 1999Date of Patent: July 15, 2003Assignee: Samsung Electronics Co., Ltd.Inventors: Sung-Sik Kim, Jun-Ho Sung
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Patent number: 6590605Abstract: An autostereoscopic display includes an image forming device and a substrate having alternating strips, where strips having a first optical property are separated by strips having a different optical property. This substrate may be composed of alternating strips of polarization film separated by clear, nonpolarizing strips. Alternately, this substrate may be composed of first alternating strips that retard a component of linearly polarized light by one-half wavelength, separated by second alternating strips that retard a component of linearly polarized light by one wavelength. A removable, separate polarizing substrate may be removably placed in front of the substrate containing the alternating strips. When the removable polarizing substrate is placed in front of the strips in a certain orientation, autostereoscopic imaging is viewed by the observer, and when this polarizing substrate is removed, 2D imaging is viewed.Type: GrantFiled: October 14, 1999Date of Patent: July 8, 2003Assignee: Dimension Technologies, Inc.Inventor: Jesse B. Eichenlaub
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Patent number: 6510002Abstract: This invention relates to apparatus for generating a three-dimensional display from a conventional television screen or computer monitor, and in particular to an adapter that may be placed in front of a television screen or computer monitor to enable three-dimensional images to be perceived by a viewer.Type: GrantFiled: January 25, 2000Date of Patent: January 21, 2003Assignee: City University of Hong KongInventor: Peter Wai Ming Tsang
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Patent number: 6449005Abstract: A Method and apparatus is provided for producing and displaying pairs of spectrally-multiplexed gray-scale or color images of 3-D scenery for use in stereoscopic viewing thereof. In one illustrative embodiment of the present invention, pairs of spectrally-multiplexed color images of 3-D scenery are produced using a camera system records left and right color perspective images thereof and optically processes the spectral components thereof. In another illustrative embodiment of the present invention, pairs of spectrally-multiplexed color images of 3-D imagery are produced within a computer-based system which generates left and right perspective images thereof using computer graphic processes, and processes the pixel data thereof using pixel-data processing methods of the present invention.Type: GrantFiled: August 25, 2000Date of Patent: September 10, 2002Assignee: Reveo, Inc.Inventor: Sadeg M. Faris
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Patent number: 6449003Abstract: A method and circuit for converting the image format of three-dimensional electronic images produced with line polarization wherein, given that television pictures are transmitted with different line resolution and displayed on devices whose line resolution does not coincide with the line resolution of the transmitted images, lines are not only respectively inserted or skipped, but also transposed with one another.Type: GrantFiled: June 18, 1999Date of Patent: September 10, 2002Assignee: Siemens Nixdorf Informationssysteme AktiengesellschaftInventors: Christoph Mayer, Klaus Lockmann
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Patent number: 6437915Abstract: A parallax barrier includes a polarization modifying layer having aperture regions, for supplying light of a second polarization when receiving light of a first polarization, separated by barrier regions, for supplying light of a third polarization different from the second polarization when receiving light of the first polarization, and a polarizer selectively operable in a first mode and a second mode. At least one of the aperture regions and the barrier regions alters the polarization of light passing therethrough. The polarizer passes light of the second polarization and blocks light of the third polarization in the first mode and passes light of the third polarization in the second mode.Type: GrantFiled: February 10, 2000Date of Patent: August 20, 2002Assignee: Sharp Kabushiki KaishaInventors: Richard Robert Moseley, Graham John Woodgate, Adrian Marc Simon Jacobs, Jonathan Harrold, David Ezra
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Patent number: 6377230Abstract: In a structure in which six active matrix regions 103 to 108 are integrated on one glass substrate, horizontal scanning control circuits 101 and 102 are commonly disposed the respective active matrix regions 103 to 105 and 106 to 108. Then, the horizontal scanning control circuits 101 and 102 are operated at different timings, and images formed by the active matrix regions 103 to 105 and 106 to 108 are synthesized and projected. With this operation, the horizontal scanning frequency required for one horizontal scanning control circuit can be made half of the horizontal scanning frequency of the display screen.Type: GrantFiled: October 7, 1996Date of Patent: April 23, 2002Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Yoshiharu Hirakata, Jun Koyama, Satoshi Teramoto
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Patent number: 6351280Abstract: An autostereoscopic display system is capable of tracking one or more users within a viewing zone and presenting complementary stereoimages to each of the viewer's (or viewers') eyes. Polarization is used to segregate the images that are to be directed to different spatial regions. The two images are interdigitated within a single display—that is, each band of image points from the first image alternates with a band of image points from the second image on the display. The bands of the first image are polarized in a first mode and the bands of the second image are polarized in a second mode orthogonal to the first, e.g., through use of a liquid-crystal display (LCD) in which alternating, contiguous bands of pixels correspond to bands of one or the other image, and a “patterned polarizer” also organized into bands and aligned with the pixel bands.Type: GrantFiled: November 20, 1998Date of Patent: February 26, 2002Assignee: Massachusetts Institute of TechnologyInventor: Stephen A. Benton
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Patent number: 6252624Abstract: A three-dimensional display is provided with a display device alternatively displaying an image for the right eye and an image for the left eye in division of the images at predetermined time periods. A liquid crystal shutter disposed in front of the display device is operated in synchronization with image switching of the display device, and the image transmitted through the liquid crystal shutter is observed as a three-dimensional image through polarized glasses of which polarizing directions differ in the right and left from each other. The liquid crystal cell which serves as a liquid crystal shutter has a structure of a ferroelectric liquid crystal held between two sheets of resin film substrates and the ferroelectric liquid crystal contains more than 10 wt % of ferroelectric liquid crystal polymer so that it can respond to a large size display device and a high speed motion.Type: GrantFiled: March 12, 1998Date of Patent: June 26, 2001Assignee: Idemitsu Kosan Co., Ltd.Inventors: Kimihiro Yuasa, Kento Okoshi, Hirofumi Kondo, Hironobu Ichige, Takeki Kofuji
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Patent number: 6252707Abstract: Systems for three-dimensional viewing and projection aimed at full-color flat-screen binocular stereoscopic viewing without the use of eyeglasses for the viewer. Light emanating from a display or projected thereat presenting a left image and a right image is directed only to the appropriate left or right eye of at least one viewer using various combinations of light polarizing layers and layers of light rotating means or color filters.Type: GrantFiled: July 21, 1998Date of Patent: June 26, 2001Assignee: 3ality, Inc.Inventors: Paul Kleinberger, Ilan Kleinberger
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Patent number: 6239908Abstract: Temporally interlaced first and second sequential pluralities of image frames are displayed and alternately directed along respected first and second optical paths to distinct viewing locations, for example the left and right eyes of a viewer, wherein the image frames of one of the sequential pluralities represent mirror images of the object being imaged. In one aspect, both sets of sequential pluralities of image frames are simultaneously distributed to both optical paths and first and second shutters are controlled in synchronism with the image display so as to display the respective sequential pluralities of image frames only at the corresponding viewing locations. In another aspect, respective first and second sequential pluralities of image frames are switched between the first and second optical paths by synchronously switching the polarization state of the image display and by a polarizing beam splitter.Type: GrantFiled: November 12, 1999Date of Patent: May 29, 2001Inventor: Shawn L. Kelly
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Patent number: 6222672Abstract: An imaging system according to the invention includes: a matrix of light modulating elements including first and second elements for respectively transmitting first and second image components; a polarizing element having a first polarization axis for linearly polarizing light from the first and second elements; a first optical retardation element incorporating at least one first retarder having first and second regions respectively having a first optic axis at a first orientation and a second option axis at a second orientation to the first polarization axis; and a detecting element having first and second detecting parts, each detecting part including respective second optical retardation element incorporating at least one second retarder and an analyzing element having a second polarization axis intended to be disposed at a defined orientation relative to the first polarization axis, at least one second retarder of the first detecting part having an optic axis which is intended to be disposed substantiallyType: GrantFiled: November 24, 1998Date of Patent: April 24, 2001Assignee: Sharp Kabushiki KaishaInventors: Michael John Towler, Harry Garth Walton, Elizabeth Jane Acosta
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Patent number: 6211927Abstract: A display unit which allows image lights utilizing circularly polarized light to be transmitted to an observer without degrading its polarization characteristics by an optical system such as lenses and screen is provided. The display unit which allows an image to be observed from the back of the screen on the opposite side from a light source by forming the image on the surface of the screen via the light source comprises a first liquid crystal panel for displaying images; a second liquid crystal panel for displaying images disposed so as to adjoin to the first liquid crystal panel; means for projecting linearly polarized image lights output respectively from the first and second liquid crystal panels on the surface of the screen simultaneously so that their polarization directions differ from each other; and means provided in the screen for transforming the projected linearly polarized lights into circularly polarized lights.Type: GrantFiled: January 11, 2000Date of Patent: April 3, 2001Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Yoshiharu Hirakata, Jun Koyama
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Patent number: 6111598Abstract: A Method and apparatus is provided for producing and displaying pairs of spectrally-multiplexed gray-scale or color images of 3-D scenery for use in stereoscopic viewing thereof. In one illustrative embodiment of the present invention, pairs of spectrally-multiplexed color images of 3-D scenery are produced using a camera system records left and right color perspective images thereof and optically processes the spectral components thereof. In another illustrative embodiment of the present invention, pairs of spectrally-multiplexed color images of 3-D imagery are produced within a computer-based system which generates left and right perspective images thereof using computer graphic processes, and processes the pixel data thereof using pixel-data processing methods of the present invention.Type: GrantFiled: November 12, 1993Date of Patent: August 29, 2000Assignee: Peveo, Inc.Inventor: Sadeg M. Faris
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Patent number: 6094216Abstract: A stereoscopic display apparatus and method performs and includes, respectively, steps of dividing each of a plurality of parallax images supplied from a parallax image source having parallax image information into stripe pixels, displaying, on a display, a single stripe image by arranging and synthesizing some of the stripe pixels in a predetermined order, displaying a slit pattern consisting of a light-transmission portion and a light-shielding portion arranged at a predetermined pitch on a spatial light modulation element arranged at a predetermined position on the front or rear side of the display, inputting light transmitted through the stripe pixels, corresponding to the right and left eyes of an observer, of the stripe image to the right and left eyes of the observer via the spatial light modulation element and synchronously displaying the stripe pattern and the slit pattern in units of pixels or scan lines on corresponding scan lines of the display and the spatial light modulation element.Type: GrantFiled: May 20, 1996Date of Patent: July 25, 2000Assignee: Canon Kabushiki KaishaInventors: Naosato Taniguchi, Hiroaki Hoshi, Saburo Sugawara, Toshiyuki Sudo, Hideki Morishima, Kazutaka Inoguchi
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Patent number: 6075555Abstract: Apparatus and method for image enhancement in which an autostereoscopic image, comprising a different perspective view of an object field for each eye of an observer is, typically provided. The optical cross-talk, which is often a feature of autostereoscopic images, is suppressed when images are displayed, by preconditioning of the image intended for each eye. Supplementary image data is produced by mixing the different perspective image data and this is applied to the primary data. By inversion of a cross-talk matrix, two or more different perspective channels can be preconditioned to cancel the effects of such cross-talk, providing clear images for each eye without the unwanted interference from other views. The viewer's location with respect to the display device can be used to modify the characteristics of both the display and the level of cross-talk correction. A camera or endoscope for providing stereoscopic images can also suffer from optical cross-talk.Type: GrantFiled: October 2, 1997Date of Patent: June 13, 2000Inventor: Graham S. B. Street
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Patent number: 6046849Abstract: A parallax barrier includes a polarisation modifying layer having aperture regions, for supplying light of a second polarisation when receiving light of a first polarisation, separated by barrier regions, for supplying light of a third polarisation different from the second polarisation when receiving light of the first polarisation, and a polariser selectively operable in a first mode and a second mode. At least one of the aperture regions and the barrier regions alters the polarisation of light passing therethrough. The polariser passes light of the second polarisation and blocks light of the third polarisation in the first mode and passes light of the third polarisation in the second mode.Type: GrantFiled: September 12, 1997Date of Patent: April 4, 2000Assignee: Sharp Kabushiki KaishaInventors: Richard Robert Moseley, Graham John Woodgate, Adrian Marc Simon Jacobs, Jonathan Harrold, David Ezra
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Patent number: 6038071Abstract: An arrangement which can produce a stereoscopic image simply and cheaply. An optical unit views an object and a stereoscopic image is provided onto a recording device or a display device by differentially polarizing the beams.Type: GrantFiled: October 30, 1996Date of Patent: March 14, 2000Assignee: Deutshce Thomson-Brandt GmbHInventor: Yoshiharu Chikazawa
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Patent number: 6016159Abstract: A Method and apparatus is provided for producing and displaying pairs of spectrally-multiplexed gray-scale or color images of 3-D scenery for use in stereoscopic viewing thereof. In one illustrative embodiment of the present invention, pairs of spectrally-multiplexed color images of 3-D scenery are produced using a camera system records left and right color perspective images thereof and optically processes the spectral components thereof. In another illustrative embodiment of the present invention, pairs of spectrally-multiplexed color images of 3-D imagery are produced within a computer-based system which generates left and right perspective images thereof using computer graphic processes, and processes the pixel data thereof using pixel-data processing methods of the present invention.Type: GrantFiled: September 1, 1998Date of Patent: January 18, 2000Assignee: Reveo, Inc.Inventor: Sadeg M. Faris
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Patent number: 6011580Abstract: A stereoscopic image display apparatus including a liquid crystal display of light transmission type for displaying right-eye and left-eye target images, a pair of CRTs for displaying illuminating graphic patterns for illuminating the display from the back surface, and a Fresnel lens 11 arranged before the CRTs to show the viewer given displayed portions on the display screens of these CRTs in an enlarged scale. A first graphic pattern polarized in the X direction is displayed at a first position, which corresponds to the right eye of the viewer, on the display screen of the first CRT. A second graphic pattern polarized in the Y direction perpendicular to the X direction is displayed at a second position, which corresponds to the left eye of the viewer, on the second CRT. The display screen of the liquid crystal display is illuminated from the behind by the light from the first and second graphic patterns displayed on the CRTs, respectively.Type: GrantFiled: June 6, 1995Date of Patent: January 4, 2000Assignee: Terumo Kabushiki KaishaInventors: Tomohiko Hattori, Shigeru Omori, Kunimasa Katayama, Sadayuki Sakuma
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Patent number: 5982538Abstract: A stereoscopic image projector has a light valve controlled by two image signals. The light valve produces a polarized raster image in which some rasters are modulated by the first image signal and other rasters by the second image signal. A polarization switch changes the polarization of rasters modulated by the second image signal, thereby creating a stereoscopic image, which is projected through a projection lens onto a screen, and viewed through polarizing eyeglasses. A color stereoscopic image is obtained by using three light valves and three polarization switches, one for each of the three primary colors, and combining their images for projection through a single projection lens. The projection lens is preferably a telecentric zoom lens consisting of three lens groups.Type: GrantFiled: April 3, 1997Date of Patent: November 9, 1999Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Shinsuke Shikama, Daisuke Umeno
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Patent number: 5903304Abstract: In a process for generating a stereoscopic video picture by using partial images for the left eye and the right eye of an observer, which partial images emit light with different polarization states oriented orthogonally relative to one another, wherein the observer perceives the stereoscopic video picture through spectacles with eyepieces which filter the respective polarization state of the light. At least one light source is used for generating every partial image. This light source emits a substantially parallel, polarized light bundle which can be controlled with respect to intensity and whose polarization state is identical to one of the two orthogonal polarization states or can be converted into this polarization state with low loss and is raster-scanned on a screen to generate at least one partial image.Type: GrantFiled: April 28, 1997Date of Patent: May 11, 1999Assignee: LDT GmbH & Co. Laser-Display Technologie KGInventor: Christhard Deter
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Patent number: 5900972Abstract: Stereoscopic effects can be created by binocular parallax. Known stereoscopic display systems show pseudoscopic effects in outer areas of the image viewing position and the viewing position is fixed. To avoid such pseudoscopic effects and/or to change the viewing position stereoscopic displays using parallax barriers with variable pitch length, moving barriers parallel to the display plane, and a polarizing device forming polarized light together with polarizing prisms are provided.Type: GrantFiled: December 9, 1996Date of Patent: May 4, 1999Assignee: Thomson multimedia S.A.Inventor: Yoshiharu Chikazawa
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Patent number: 5875055Abstract: A stereoscopic image display method using a display, a phase shift member and a polarization optical element, two different types of vertically elongated stripe-shaped polarization plates having orthogonal optical axes, includes the steps of displaying, on the display, a single stripe image which is synthesized in such a manner that right and left parallax images from a parallax image source are divided into stripe pixels, and the stripe pixels of the right and left parallax images are arranged in a predetermined order, and controlling a direction of polarization of light transmitted through the phase shift member by controlling the electrical signal to be applied to the phase shift member in synchronism with the display operation of the stripe image.Type: GrantFiled: June 26, 1996Date of Patent: February 23, 1999Assignee: Canon Kabushiki KaishaInventors: Hideki Morishima, Jun Tokumitsu, Hiroaki Hoshi, Naosato Taniguchi, Toshiyuki Sudo, Kazutaka Inoguchi
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Patent number: 5872590Abstract: A position of an observer in a stereoscopic observing region is detected by a position detecting unit. A right-eye image and a left-eye image which are seen from the detecting position are formed by an image forming unit and displayed on a display. By setting an aperture position of a projection optical system, the right-eye image is projected to the right-eye position of the observer and the left-eye image is projected to the left-eye position, thereby allowing a stereoscopic image to be observed. Further, an aperture is set so as to project the right-eye image or left-eye image to a position different from the detecting position of the observer, thereby allowing a same image to be seen to both eyes of another observer and allowing a two-dimensional image to be observed.Type: GrantFiled: April 4, 1997Date of Patent: February 16, 1999Assignee: Fujitsu Ltd.Inventors: Hirokazu Aritake, Manabu Ishimoto, Junji Tomita, Satoshi Maeda, Takahiro Matsuda, Satoshi Iwata, Masato Nakashima
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Patent number: 5861908Abstract: A signal processing apparatus is provided with processing units capable of reducing the number of signal processors and the number of adjustments of a delay time between reversal and non-reversal of video-signal polarity in each of two signal paths in an arrangement in which two liquid-crystal displays (LCDS) are provided in a head-mounted display worn by an observer and each of the two displays is used to display video information viewed by the observer. The signal processing apparatus includes first and second signal sources (1 and 2) each of which generates a video signal, reversing unit 7 for reversing the polarity of one of the two video signals, first selector selectively supplying one of the video signals to the reversing unit, first and second display units (3 and 4) for converting the video signals to respective ones of optical signals, and second selector for selectively supplying a video signal whose polarity is or is not reversed by the reversing unit to the first and second display units.Type: GrantFiled: November 8, 1994Date of Patent: January 19, 1999Assignee: Canon Kabushiki KaishaInventors: Satoshi Tonosaki, Yasuyuki Yamazaki
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Method for generating a stereoscopic image and an arrangement for stereoscopically viewing an object
Patent number: 5835264Abstract: The invention is directed to a method and arrangement for generating stereoscopic images of an object. The method includes the steps of illuminating an object with an illuminating beam; masking the illuminating beam to generate a first component beam to illuminate the object at a first angle and provide a first image of the object to a first viewing eye; again masking the illuminating beam to generate a second component beam to illuminate the object at a second angle and to provide a second image of the object to a second viewing eye; and, alternately repeating the last two steps at a frequency above the flicker frequency of the human eye. In the arrangement of the invention, a beam generating device alternately generates first and second illuminating beam components which illuminate the object via illuminating optics at respectively different angles to produce respective images of the object.Type: GrantFiled: March 4, 1996Date of Patent: November 10, 1998Assignee: Carl Zeiss Jena GmbHInventors: Hans Tandler, Gudrun Nordt, Reed Werlich, Karl-Heinz Geier, Johannes Knoblich, Gunter Schoppe -
Patent number: 5825541Abstract: In synchronism with a vertical synchronizing signal of a display for temporarily alternatively displaying a right eye picture and a left eye picture cooperative with each other to provide binocular parallax information, a shifter is controlled to shift a first parallax barrier by half a pitch of stripe regions thereof to effect a switching between a state in which every other stripe region is transparent and the remaining stripe regions are all shading and a reversed state thereof so that the right eye picture and the left eye picture are independently observable by a right eye and a left eye of an observer, respectively, through the first parallax barrier and a second parallax barrier composed of a plurality of stripe regions of which every other one is transparent while the remaining ones are all shading.Type: GrantFiled: July 26, 1996Date of Patent: October 20, 1998Assignee: NEC CorporationInventor: Masao Imai
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Patent number: 5822117Abstract: Systems for three-dimensional viewing aimed at full-color flat-screen binocular stereoscopic viewing without the use of eyeglasses for the viewer. According to the invention, light emanating from a display presenting a left image and a right image is directed only to the appropriate left or right eyes of at least one viewer using various combinations of light polarizing layers and layers of light rotating means.Type: GrantFiled: June 3, 1996Date of Patent: October 13, 1998Inventors: Paul Kleinberger, Ilan D. Kleinberger
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Patent number: 5760827Abstract: A Method and apparatus is provided for producing and displaying pairs of spectrally-multiplexed gray-scale or color images of 3-D scenery for use in stereoscopic viewing thereof. In one illustrative embodiment of the present invention, pairs of spectrally-multiplexed color images of 3-D scenery are produced using a camera system records left and right color perspective images thereof and optically processes the spectral components thereof. In another illustrative embodiment of the present invention, pairs of spectrally-multiplexed color images of 3-D imagery are produced within a computer-based system which generates left and right perspective images thereof using computer graphic processes, and processes the pixel data thereof using pixel-data processing methods of the present invention.Type: GrantFiled: January 17, 1997Date of Patent: June 2, 1998Assignee: Reveo, Inc.Inventor: Sadeg M. Faris
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Patent number: 5745164Abstract: A Method and apparatus is provided for producing and displaying pairs of spectrally-multiplexed gray-scale or color images of 3-D scenery for use in stereoscopic viewing wherein pairs of spectrally-multiplexed color images of 3-D scenery are produced using a camera system records left and right color perspective images thereof and optically processes the spectral components thereof. In another illustrative embodiment, pairs of spectrally-multiplexed color images of 3-D imagery are produced within a computer-based system which generates left and right perspective images thereof using computer graphic processes, and processes the pixel data thereof using pixel-data processing methods.Type: GrantFiled: January 17, 1997Date of Patent: April 28, 1998Assignee: Reveo, Inc.Inventor: Sadeg M. Faris
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Patent number: RE38933Abstract: A method and circuit for converting the image format of three-dimensional electronic images produced with line polarization wherein, given that television pictures are transmitted with different line resolution and displayed on devices whose line resolution does not coincide with the line resolution of the transmitted images, lines are not only respectively inserted or skipped, but also transposed with one another.Type: GrantFiled: December 5, 1997Date of Patent: January 10, 2006Assignee: Fujitsu Siemens Computer GmbHInventors: Christoph Mayer, Klaus Lockmann