摘要:
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.
摘要:
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.
摘要:
A stereoscopic image display system includes an image display screen for displaying images; a controller and a display driver circuit for causing left-eye images and right-eye images to be produced on the display screen in a format of image components which at any particular time define a left-eye image field interlaced with a right-eye image field; a shutter system having variable transparency shutter components positioned in front of the image display screen for defining a viewing position on the opposite side of the shutter system from the display screen. The transparency of the shutter components is controlled to attenuate the left-eye image field from view by the right eye of a viewer at the viewing position, to attenuate the right-eye image field from view by the left eye of the viewer, to enable view of the left-eye image field by the left eye of the viewer, and to enable view of the right-eye image field by the right eye of the viewer. The image components that define the left-eye image field are periodically interchanged with the image components that define the right-eye image field, and the respective transparencies of the shutter components are interchanged when the image components are interchanged so that each eye views an image having twice the resolution as would otherwise be provided. The shutter system includes a plurality of parallel arrays of variable transmittance elements for composing the shutter components.
摘要:
An image taken by a mobile camera is displayed on a head-mounted display provided with an acceleration sensor to detect movement of the observer's head, and the size of the image viewed by the observer wearing the display is varied according to the movement of the observer's head. For varying the image size, the camera is equipped with a zoom lens to change the size of shooting area, or alternatively, the display is equipped with a zoom lens as the eyepiece to enlarge or reduce the size of the displayed image. An image showing the appearance of the camera is displayed being superimposed on the image taken by the camera in order to facilitate the control of the camera by the observer.
摘要:
An electro-optical recording system for recording spatially multiplexed images (SMI) of a 3-D object for use in stereoscopic viewing thereof with high image quality and resolution. A micropolarization panel of electrically passive polarization is employed to produce first and second patterns corresponding to spatially modulated perspective images. These pixel patterns are optically combined to produce a spatially multiplexed image of the 3-D object which can be used for stereoscopic viewing thereof with high image quality and resolution.
摘要:
Screen images for the right eye are displayed upside down on an image display device 10a, and screen images for the left eye are displayed inverted upside down and right-to-left on an image display device 10b. Light of the screen images for the right eye and for the left eye are polarized so that polarization directions of the light for the right eye and for the left eye are perpendicular to each other. Right half images of viewers' faces, picked up by an image sensing device 14, are displayed on liquid crystal display elements 11. The displayed images functions as light transmission images, and by observing them through a lens 11 having directivity characteristics, the screen images for the right eye and screen images for the left eye of images combined by a half mirror 15 are respectively seen by the right and the left eyes of the viewers.
摘要:
A three-dimensional (3-D) virtual display system for displaying a flicker-free 3-D virtual image to each of N viewers randomly dispersed about a horizontally disposed viewing screen, where N is an integer greater than 1, includes a laser projector for generating N.times.M image pairs responsive to a video signal comprising the N.times.M image pairs, N transmitters associated with respective ones of the N viewers, each of the N transmitters generating a unique coded pulse, a detector for determining the position of each of the N viewers relative to the viewing screen responsive to the respective unique coded pulse and for generating respective position data, a graphics processor for generating the video signal responsive to the position data, and N selectors associated with the N viewers for selecting the M image pairs out of the N.times.M image pairs allocated to each of the N viewers, respectively. The projector includes an electron-beam-pumped semiconductor laser (EBSL) screen, e.g., a vertical cavity surface emitting laser screen. In an exemplary case, the video signal carries in excess of 1000 image pairs per second, which is far beyond the capability of conventional cathode ray tubes (CRTs) to display. A method for generating N 3D virtual images and a corresponding video signal are also described.
摘要:
An image display apparatus of head mounted type includes first and second liquid crystal display panels for displaying first and second images to be observed by right and left eyes, respectively of a user wearing the image display apparatus, an optical system for forming virtual images of the displayed first and second images such that the virtual images can be seen by the user, a controller for controlling electronically at least one of position, posture, size and shape of the first and second displayed images. The first and second images are smaller than display areas of the first and second liquid crystal display panels. In one embodiment, the controller includes a button for moving horizontally and vertically the displayed images on the display panels and a button for rotating the displayed images. In another embodiment, the controller includes a detector for detecting rotation and/or position of the apparatus and the displayed images are shifted and rotated and size or shape of the displayed images is changed such that the virtual images are seen to be stationary in a virtual image plane.
摘要:
Apparatus and method for the alignment of images in which, typically, two perspective views are provided. The observer's head location is detected and each of the views is presented to the respectively correct eye to provide a stereoscopic image. A retro-reflective marker worn by the observer removes the need for the observer to wear special viewing devices, whilst providing an infrared imaging system with a way to locate the observer's head. Image content may be driven by the observer's viewpoint. The two perspectives may be presented simultaneously using conventional display elements. A tapered lenticular structure provides a way to adapt to changes in the observer's distance from the display. Alternatively, each perspective image may be rapidly sequenced, either as two complete single images, or a sequence of suitably arranged compositions of the two. The infrared source used in the head tracking apparatus is modulated to aid image processing. The modulated source may also be used to synchronize a stereoscopic viewing device, switching views on a field sequential basis. Inter alia, the invention has applications in minimally invasive surgery, remote handling, virtual reality, teleconferencing and computer aided design and visualization.
摘要:
A field sequential color illumination system for liquid crystal displays is described which focuses light from a plurality of small point like or line like light sources into subregions of pixels of an LCD by a fly's eye lens, in such a manner that at any given time, red, blue, and green light spots are focused simultaneously into different pixels. Furthermore, during each subsequent field, light spots are focused into different sub sections of each pixel in such a way that each pixel receives red, green, and blue illumination sequentially during each set of three fields. During each field, each pixel is addressed and made to display the appropriate transmittance level to display the appropriate red, green, or blue color level for its location on the red, blue, or green color component of the image just prior to illumination of a sub region by a red, green, or blue light source.