Separation By Polarization Patents (Class 348/58)
  • Patent number: 5673091
    Abstract: The present invention concerns a liquid crystal display device consisting of a system of pixel elements. The display device includes an assembly of at least first and second display elements. The extremities of the display elements are overlapped so as to maintain a constant spacing between the pixel elements. Each display element includes two glass plates sealed together with a liquid crystal element between them.
    Type: Grant
    Filed: October 13, 1995
    Date of Patent: September 30, 1997
    Assignee: Souriau Diagnostic Electronique
    Inventors: Jean-Francois Boisdron, Michel Chaudagne
  • Patent number: 5638082
    Abstract: An image display system comprises polarization spectacles having different polarization axes with or without .lambda./4-foils of both polarization lenses forward of the eyes of the person to be tested. The system of the invention further includes an image display device for generating light with a specific direction of polarization or a specific rotational direction of the circularly polarized light. The image display device comprises essentially at least one vectograph film and at least one image screen. This arrangement can so influence the light coming from the image screen that test figures or parts thereof can be seen by only one eye or by both eyes. If the image display system is to be used as a vision testing system and the test figures are to be changed, then there is a corresponding command of a drive circuit via a memory. The drive circuit drives the image screen in a suitable manner. A color display can be provided by making an appropriate modification to the image display device.
    Type: Grant
    Filed: October 25, 1993
    Date of Patent: June 10, 1997
    Assignee: Carl-Zeiss Stiftung
    Inventor: Wolfgang Grimm
  • Patent number: 5629798
    Abstract: A method and device for displaying, on a single display surface, two different images. Each picture element on the display surface transmits information about the two displayed images. The viewer wears polarizing spectacles having cross polarized lens. The device uses polarizing filters and LCDs to rotate the polarized light and bring this polarized light in a predetermined angle so as to present an independent intensity to each eye of the viewer.
    Type: Grant
    Filed: March 7, 1996
    Date of Patent: May 13, 1997
    Inventor: Jean E. Gaudreau
  • Patent number: 5598282
    Abstract: A stereoscopic display is comprised of a pair of display apparatus having faces mutually oriented between approximately 90.degree. and 120.degree. to each other, apparatus for polarizing light from images displayed on the respective display apparatus, light from one image being polarized orthogonally to the light from the other image, a semitransparent mirror disposed between and approximately bisecting the angle between the pair of display apparatus for transmitting light from an image displayed on one display apparatus and reflecting light from an image displayed on the other display apparatus, toward a viewing position.
    Type: Grant
    Filed: October 17, 1994
    Date of Patent: January 28, 1997
    Assignee: ATI Technologies Inc.
    Inventor: Steven L. DeGroof
  • Patent number: 5596363
    Abstract: Apparatus (2) for stereoscopically viewing images from a single screen, comprising a housing (6), at least one mirror (8,10) which just reflects light, a mirror (12) which both reflects light and transmits light, and a polarizing device (14, 16). The mirrors (8, 10, 12) are mounted at an angle and are optically in communication with each other whereby a pair of landscape stereoscopic images are optically manipulated between an orientation required suitable for visual image recording or reproduction.
    Type: Grant
    Filed: January 20, 1995
    Date of Patent: January 21, 1997
    Inventor: John A. Christian
  • Patent number: 5552840
    Abstract: The present invention relates to a projection type liquid crystal display. In a preferred aspect, the projection type liquid crystal display of the invention includes an optical source for generating light, a light dividing unit which divides the light into a first light having a first polarization direction and a second polarization direction and allows the first and second lights to come out in different directions from each other, a pair of reflective liquid crystal display elements formed of a first reflective liquid crystal display element and a second reflective liquid crystal display element with synchronization, a light synthesizing unit for receiving the first light which comes out of the first reflective liquid crystal display element and the second light which comes out of the second reflective liquid crystal display element and synthesizing the first and second lights into image light, and a screen.
    Type: Grant
    Filed: March 11, 1993
    Date of Patent: September 3, 1996
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yutaka Ishii, Yoshitaka Yamamoto
  • Patent number: 5541641
    Abstract: In glasses for viewing stereoscopic images on a stereoscopic image display for displaying stereoscopic images by dividing a predetermined display screen into two to display a first and a second image which are viewed from different points on the divided display, a stereoscopic image can be observed without a sense of discomfort. Glasses for viewing stereoscopic images can be constructed which allow people to observe a stereoscopic image with less of a sense of discomfort by providing a sight-limitation frame for the right eye that allows only the right screen to be observed and a sight-limitation frame for the left eye that allows only the left screen to be observed.
    Type: Grant
    Filed: August 31, 1994
    Date of Patent: July 30, 1996
    Assignee: Sony Corporation
    Inventor: Satoshi Shimada
  • Patent number: 5537144
    Abstract: An electro-optical display system for visually displaying a polarized spatially multiplexed image (SMI) of a 3-D object for use in stereoscopic viewing thereof with high image quality and resolution. In the illustrative embodiment, electro-optical display system comprises a liquid crystal display device and a micropolarization panel of electrically-passive construction. The liquid crystal display device has a display surface for visually displaying a composite pixel pattern representative of a spatially multiplexed image composed of first and second spatially modulated perspective images of the object, consisting of first and second pixel patterns. The micropolarization panel includes an optically transparent laminate portion and an optically transparent substrate portion which is in direct physical contact with the laminate portion. First and second optically transparent patterns are permanently formed in the optically transparent laminate portion.
    Type: Grant
    Filed: September 23, 1993
    Date of Patent: July 16, 1996
    Assignee: Revfo, Inc.
    Inventor: Sadeg M. Faris
  • Patent number: 5408264
    Abstract: A three-dimensional image display apparatus which includes a plurality of display devices, a first optical arrangement for synthesizing a plurality of images from the image display devices, a second optical arrangement for changing a position where at least one of the images is projected, the first and second optical arrangement synthesizing a plurality of images formed at different positions.
    Type: Grant
    Filed: April 10, 1992
    Date of Patent: April 18, 1995
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yukio Kurata, Keiji Sakai, Yoshio Yoshida, Takahiro Miyake, Toshio Ishikawa
  • Patent number: 5331358
    Abstract: A vision testing system includes polarization spectacles having different polarization axes with or without .lambda./4 filters for the two polarization lenses forward of the eye of the patient to be tested. This system also includes a vision testing apparatus for generating light having a specific polarization direction. The vision testing apparatus includes essentially two polarization filters and two LCD-displays which are mounted alternately one behind the other. This arrangement can so influence the light coming from the light source that test figures or portions of the test figures can be seen by one eye or by both eyes. If a test figure is to be changed, then a corresponding command is issued via a key pad to a switching unit which drives two drive circuits of the two LCD-displays in a desired manner. By making appropriate modifications of the vision testing apparatus, a patient can be tested as to color-vision acuity.
    Type: Grant
    Filed: May 8, 1992
    Date of Patent: July 19, 1994
    Assignee: Carl-Zeiss-Stiftung
    Inventors: Hermann Schurle, Wolfgang Grimm, Hartmut Mennicke
  • Patent number: 5317393
    Abstract: A stereoscopic image displaying apparatus is disclosed. The pixels of the displaying apparatus consist of a plurality of pairs of odd columns pixels and even column pixels, and optical polarizing means for passing only one of vertical and horizontal components of light rays installed in front of the odd column pixels and the even column pixels, wherein if a user wears polarizing glass, then the user can see a clear stereoscopic image regardless of the position of the user.
    Type: Grant
    Filed: July 21, 1992
    Date of Patent: May 31, 1994
    Assignee: Samsung Electron Devices Company, Ltd.
    Inventor: Chun Gyoo Lee