EP1776837A1 - Dispositif de separation d'images a point ideal pour ecrans autostereoscopiques a utilisateurs multiples - Google Patents

Dispositif de separation d'images a point ideal pour ecrans autostereoscopiques a utilisateurs multiples

Info

Publication number
EP1776837A1
EP1776837A1 EP05714908A EP05714908A EP1776837A1 EP 1776837 A1 EP1776837 A1 EP 1776837A1 EP 05714908 A EP05714908 A EP 05714908A EP 05714908 A EP05714908 A EP 05714908A EP 1776837 A1 EP1776837 A1 EP 1776837A1
Authority
EP
European Patent Office
Prior art keywords
matrix
sweet
spot
separating device
spot image
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP05714908A
Other languages
German (de)
English (en)
Inventor
Armin Schwerdtner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SeeReal Technologies GmbH
Original Assignee
SeeReal Technologies GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SeeReal Technologies GmbH filed Critical SeeReal Technologies GmbH
Publication of EP1776837A1 publication Critical patent/EP1776837A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/302—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays
    • H04N13/307—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays using fly-eye lenses, e.g. arrangements of circular lenses
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/302—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays
    • H04N13/305—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays using lenticular lenses, e.g. arrangements of cylindrical lenses
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/302—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays
    • H04N13/31—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays using parallax barriers
    • H04N13/312—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays using parallax barriers the parallax barriers being placed behind the display panel, e.g. between backlight and spatial light modulator [SLM]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/302—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays
    • H04N13/32—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays using arrays of controllable light sources; using moving apertures or moving light sources
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/366—Image reproducers using viewer tracking
    • H04N13/368—Image reproducers using viewer tracking for two or more viewers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/366—Image reproducers using viewer tracking
    • H04N13/376—Image reproducers using viewer tracking for tracking left-right translational head movements, i.e. lateral movements

Definitions

  • the present invention relates to a sweet-spot image separator for autostereoscopic multi-user displays that sequentially display the stereo information in two or more views for one or more viewers.
  • Autostereoscopic multi-user displays here consist of a sweet-spot unit and an image matrix as an information display.
  • the sweet-spot unit contains a lighting and a focusing matrix arranged one after the other in the light direction and serves to focus the screen content of the image matrix onto viewer eyes in sweet spots.
  • the left / right image contents intended for the left / right eye of the observer must be supplied to the left / right eye, preferably without crosstalk, to the other eyes.
  • the corresponding means for this are also referred to as image separating means and realized in this invention by an illumination matrix and a focusing matrix designed according to the invention.
  • Autostereoscopic displays do not require additional aids such as glasses or the like for viewing. Tracking allows the observers to move independently of one another in a certain area without losing the stereoscopic image impression. In addition, a sweet spot allows a certain amount of room to move without the need for tracking. Alternatively, the tracking can be done with greater tolerance.
  • the representation of the stereo information on a display can be temporally or spatially nested.
  • WO 03/053072 discloses a three-dimensionally positionable backlight. It is used in various configurations, e.g. successively arranged LCDs or reflective addressable surfaces described. These light sources, which can be addressed in the 3D backlight, are imaged by a lens as an imaging system on the eyes of one or more observers and track their movement. On its way to the observers, the light passes through a light modulator, which in time-sequential mode offers one left or right image for the right eye from one or more 3D programs.
  • a disadvantage of this method is the great depth of the autostereoscopic display, which results from the three-dimensional backlight and the imaging lens with an extremely large diameter.
  • the focal length and thus the device depth must be sufficiently large.
  • the device is very heavy and difficult to produce the three-dimensionally positionable backlight.
  • the document EP-B-0773 462 describes a stereoscopic arrangement with which a single observer is specifically supplied with stereo information on a display. This is achieved by the arrangement of two lenticulars on the viewer side of the display, between which a prismatic mask is arranged. The angles of individual prisms of the prism mask vary in columns from the edge to the center, as do the radii of the individual lenses of the lenticulars, whereby a pixel pair is covered by each individual element of the lenticular or prism mask.
  • By means of light-absorbing means and corresponding distances of the individual lenses and prisms with each other is achieved that the right and left image to the viewer and information can only be stereoscopically viewed from its position.
  • a stereoscopic display according to EP 1 102 106 allows at least two viewers to simultaneously and independently of each other to see a different stereoscopic image in 2D and / or 3D mode.
  • a lighting arrangement is included, with each of which a pair of light sources imaged via an optical system to the eyes of a particular viewer and synchronously the corresponding image pair is presented on a display line by line.
  • the image pairs on the display are represented by a combination of temporal and spatial nesting.
  • In a change in position of the viewer other pairs of light sources are turned on according to the position determination. That way they can move, always seeing their selected image information.
  • a disadvantage of this arrangement is the reduced resolution in the vertical direction, as well as a large adjustment effort.
  • a low light output by addressing the two images in alternating lines, which means a spreading of the light in the vertical direction, is another disadvantage.
  • a general disadvantage of tracked displays is the fact that the latencies of the position finder and the tracking system often cause crosstalk during faster movements of a viewer. Likewise, it is generally not considered that the eye distances may be different for viewers.
  • the document WO 99/05859 describes inter alia an arrangement for the simultaneous display of different images or programs for a plurality of viewers on a display. Every viewer can see his pictures without the individual depictions interfering with each other. For this purpose, each viewer is assigned a separate image matrix with associated projection unit, which each have a fixed distance to each other. The images projected into the image plane all appear on one and the same screen and can only be seen by a viewer from their position, with a certain amount of Viewer mobility has.
  • a spatial separation of the image pairs of a 3D image, which can be seen stereoscopically in a relatively large viewer area, can also be achieved by using shutters in the projection unit.
  • shutters in the projection unit With the arrangements described herein, multiple larger and independent viewer areas can be created for 3D images that do not interfere with each other.
  • a disadvantage is the relatively large amount of optical and other components that also prevent a flat design for a display. For example, an image matrix with a projection system and a shutter mechanism is required for each observer.
  • the applicant has in a previous patent application DE 103 39 076. 6 a solution for increasing the range of motion and the eye relief and for a greater tolerance of position change and tracking reaction by combining an image matrix as an information display with a so-called sweet spot unit proposed, which consists of a lighting and a focusing matrix.
  • the sweet-spot unit is located in front of the image matrix in the light direction and is functionally separated from it.
  • the sweet spots are created in locations of observer's eyes and have a horizontal extent whose size advantageously corresponds to the eye relief.
  • the vertical extension of the sweet spots is due to the gap image of the openings and is not limited.
  • the size of the sweet spots reduces the otherwise stringent tracking accuracy requirements.
  • multiple viewers can be detected simultaneously and fed with sweet spots independently. This allows multiple viewers to view the same or different image sequences or programs independently of each other. With this display version real multi-user capability is achieved.
  • the visibility range of the information in the horizontal direction is limited.
  • a problem arises as soon as two or more observers are very close to each other. For example, if one viewer is sitting and another is standing behind him, overlapping vertical sweet spots will cause overlapping of image information for each viewer, or allow anyone to view the other's information, sometimes in diminished or pseudoscopic image quality. So the picture information To limit as precisely as possible to the selected viewer, it is necessary to limit the visibility range of the presented information also in the vertical direction.
  • a sweet spot is restricted in the vertical direction.
  • a focusing matrix is used which optionally consists of two crossed lenticulars L1 and L2 or a two-dimensional lens array with matrix-shaped lenses or a double lens array of two two-dimensional lens arrays with matrix-shaped lenses and in the viewer plane with a sweet-spot matrix creates two-dimensional limited sweet-spot pairs for right and left observer eyes, containing all controllable viewer positions.
  • An essential feature of the crossed lenticular L1 and L2 as a focusing matrix is that their object-side focal lines are located approximately in the plane of the illumination matrix.
  • the imaging elements of the crossed lenticulars L1 and L2 arranged in parallel, each point with their lens vertices in the light direction.
  • Another embodiment of the focusing matrix provides that the vertices of the parallel arranged imaging elements of the crossed lenticulars L1 and L2 may be opposite each other.
  • a simple two-dimensional lens array can also be a double lens array, consisting of two two-dimensional lens arrays, for Use come.
  • the lenses of the lens arrays each have a plane and a convex side. With regard to low reflection and compactness, the lenses of both lens arrays with their convex surfaces are advantageously facing each other. If the lenses of the lens arrays have the same dimensions, the manufacture can be simplified. Individual lenses of the lens arrays can also be different in size for the correction of aberrations and for other optical reasons.
  • a further improvement of the multi-user display with respect to the compensation of aberrations and the avoidance of crosstalk is achieved when the crossed lenticular, the simple lens array or the double-lens array are combined with a field lens in the focusing matrix.
  • the lenticular combined with the field lens may form a functional unit.
  • An economical production of the crossed lenticular or lens arrays can also take place, for example, by forming a compact assembly.
  • the invention provides that the matrix-shaped arranged lenses of the two-dimensional lens array or the double lens array in their optical properties, such as the focal length, are controllable. By this measure it is achieved that changes in position of at least one observer in different directions can be easily corrected.
  • the focusing matrix can be combined with an illumination matrix which is arranged in the preferably approximately common focal plane of the lenticular L1 and L2 or of the two-dimensional lens array or of the double lens array.
  • the illumination matrix itself can be designed differently. It can consist of a backlight and a shutter with controllable line or matrix-shaped openings, wherein at least one opening in the shutter is provided for each imaging element of the lenticular or lens array. It can also be an actively illuminating component with structures which can be controlled optionally in line and intensity and arranged in a line or matrix.
  • an OLED display can advantageously be used as the illumination matrix here.
  • the technical complexity can be reduced and the imaging quality of an autostereoscopic multi-user display can be improved.
  • the illumination matrix can be a projection arrangement in the form of a DLP component or the like.
  • the technical complexity and the mode of operation of the 3D representation are simplified if identical LCD panels are used for the illumination and the image matrix, whose matrices differ only in the color or black-and-white mode.
  • the sweet-spot image separating device according to the invention for an autostereoscopic multi-user display is shown in exemplary embodiments and will be described in more detail below.
  • the accompanying drawings show
  • 1 is a schematic representation of an autostereoscopic multi-user
  • FIG. 2 is a schematic representation of the sweet-spot unit, consisting of a
  • Illumination matrix and a focusing matrix to produce a
  • FIG. 3 shows a schematic representation of a focusing matrix in the form of a crossed double vertical in plan view
  • FIG. 4 shows a schematic representation of stereoscopic visibility areas in the form of sweet spots for right and left eyes of two viewers
  • FIG. 5 shows a perspective view of the light cones for two observers in different vertical and / or horizontal positions for one, which are produced in the observer plane
  • FIG. 6 is a schematic representation of another embodiment with a
  • Lens array as a focusing matrix with horizontal and vertical
  • the autostereoscopic multi-user display according to FIGS. 1 to 6 is based in stereo mode on tracking the viewer by means of a sweet-spot unit.
  • the stereo information is presented to the viewers in consecutive frames, ie sequentially. This representation of the stereo information is common.
  • sequential methods to autostereoscopic multi-user displays the resolution of the display is maintained and is not reduced, as in the spatial multi-view method, by a factor corresponding to the number of views.
  • the resolution of the image matrix is equal to the resolution of the display used.
  • Fig. 1 shows the basic structure of an autostereoscopic multi-user display in 3D mode for a viewer.
  • the sweet-spot unit generally consists of an illumination matrix and a focusing matrix whose lenses focus the light coming from the illumination matrix in parallel beams in sweet spots onto one or more selected observer's eyes in the observer plane.
  • each sweet spot follows by tracking the eyes which the position finder has located. The size of the sweet spot allows a viewer to see stereoscopically without interference, even if it moves slightly sideways, without the need for sweet spot tracking.
  • the image matrix at the instant shown contains the stereo image for the left eye of a viewer, and in synchronism therewith, a two-dimensional sweet spot is directed to that eye.
  • the sweet spot is dark at the time of imaging and is referred to as dark spots.
  • the right eye is then loaded with the right stereo image and a dark spot is switched correspondingly on the left. If the presentation of the image information of the image matrix for the right and left eye with the synchronized focusing of the sweet spots on the right and left eye is sufficiently fast, the eyes can no longer resolve the 2D image information presented to them in time. The observer sees the image information stereoscopically without crosstalk.
  • both the black-and-white panel used as the shutter for the illumination matrix and the information-carrying panel are identical except for the color matrix, which considerably simplifies the constructive design and mode of operation of the multi-user display.
  • the focusing matrix previously used in known display arrangements consists of a lenticular array with parallel cylindrical lenses arranged in the vertical direction. A viewer is detected in position and corresponding apertures of the illumination matrix are activated column by column. The rays coming from the illumination matrix hit this lenticular. Due to the optical effect of the vertically arranged cylindrical lenses, a horizontally delimited area is generated, which can be assigned to a right or left eye position of a viewer.
  • the rays of light pass through the image matrix on their way to the observer and are modulated by it with corresponding right or left image information.
  • a viewer can see from his or her location a stereo image that is only horizontally limited. He has a scope for movement in which the stereo information remains visible to him. If there is a second viewer at a different eye level next to or just behind him, their information overlaps because of the missing vertical boundary and their associated stereo images can not be properly perceived by both.
  • FIG. 1 A detailed schematic representation of FIG. 1 with the arrangement of an illumination matrix in conjunction with a two-dimensional focusing matrix according to the invention for producing a sweet spot for a viewer's eye can be seen in FIG.
  • the illumination matrix is realized in the embodiment by a backlight and a shutter.
  • This can be a component acting on the basis of light valves, preferably an LCD, an OLED or an FLCD, or else realized by a projection arrangement, eg as a DLP element (see FIG.
  • the focusing matrix consists of two crossed lenticulars L1 and L2. Both lenticular L1 and L2 are arranged relative to each other so that they point with their lens vertices in the direction of light (see Fig.
  • the lenticular are dimensioned so that their object-side focal lines approximately coincide and lie approximately in the plane of the illumination matrix. Alternatively, however, the lens crests of both lenticulars L1 and L2 may also face each other.
  • the illumination matrix individual elements are switched in columns relative to the lenticular L1 after the position detection of the observer. The radiation beams coming from there are focused horizontally into the observer plane by the first lenticular L1 of the focusing matrix. They appear as horizontally limited sweet spots.
  • the effect of the crossed lenticular L2 in which the imaging elements are arranged parallel in the horizontal direction.
  • the position finder additionally determines which vertical position the viewer is in.
  • the lighting matrix in addition, other openings are additionally switched on line by line as required.
  • the beams coming from these openings are focused by the lenticular L2 of the focusing matrix as vertically delimited sweet spots in the observer plane. Since the focal planes of both lenticular L1 and L2 are approximately in the plane of the illumination matrix, collimation of the beams is achieved in both the horizontal and vertical directions. Thus stereoscopic image information is created in the observer plane, which is focused on viewer eyes in rectangular sweet spots.
  • Fig. 4 shows this for two observers, with their rectangular sweet spots highlighted by bold lines. If one assigns the crossed lenticular openings from the preceding illumination matrix to one, one obtains a matrix of positions, which in principle can be selectively controlled in space as observer positions. This applies to horizontal as well as vertical positioning. The number of these openings of the illumination matrix per imaging element (vertical and horizontal cylindrical lens) in the focusing matrix is equal to the number of sweet-spot positions from which the image matrix can be completely viewed. Compared with the known solution with sweet spots (see DE 103 39 076), which are not limited in the vertical direction, the sweet spots according to the invention in the observer plane are limited in two dimensions.
  • the focus on viewer or on a preferred distance can be supported by the use of a field lens between focus matrix and image matrix.
  • a field lens between focus matrix and image matrix.
  • the viewers are at a distance from the display corresponding to the focal plane of a field lens, all of them become identical to one another Sweet-spot associated elements of the illumination matrix are activated and the light beams leaving the matrix are parallel to each other.
  • sweet-spot associated elements of the illumination matrix are activated and the light beams leaving the matrix are parallel to each other.
  • all of these beams are perpendicular to the imaging elements of the focus matrix.
  • the optical aberrations are minimal in this case.
  • the angles of the ray bundles continue to correspond to the deviation from the normal of the image matrix. Again, the angles at which the beams meet the imaging elements, smaller than without field lens. The same applies to a sweet spot shift normal to the image matrix.
  • FIG. 1 A perspective schematic representation with a focusing matrix according to the invention is shown in FIG.
  • the course of the light beams for two observers can be seen in different vertical and / or horizontal positions for one image line in the middle of the image matrix.
  • the drawing shows the ray trajectory simplified.
  • all image lines of the display surface are projected onto the viewer's eyes.
  • the image matrix contains the left field for this viewer.
  • a sweet spot for the left eye of the first observer is generated by a suitably programmed connection of the illumination matrix.
  • the second observer can see with his left eye either the same or a temporally sequentially displayed another image.
  • the right eye of a second observer may be in the same vertical range as the left eye of a first observer without seeing a wrong image.
  • the crossed lenticular L2 of the focusing matrix prevents the sweet spots from overlapping in the vertical direction.
  • the sweet spots for both observers are generated at different heights and are also vertically limited by the action of the second lenticular L2 exactly to the respective observer's eyes whose positions were determined by the position detector.
  • An application for presenting the information with the focusing matrix according to the invention is conceivable, for example, such that a sitting and a standing viewer are in front of a display, but only a viewer is to see the information. Although the second observer stands behind the first one, the additional vertical border of the sweet spot keeps the information hidden.
  • Another application of the multi-user display is possible when assigning different 3D image content to multiple viewers that are a short distance apart. As described for a viewer, corresponding sweet spots are successively focused on the eyes of different observers, in sync sequentially appearing the corresponding fields. Each viewer sees only his own information, without being disturbed by the neighbor. Two or more viewers can also be offered different 2D image contents by switching the sweet spots for both eyes on each observer for the associated 2D image content.
  • each viewer By concentrating the information on a horizontally and vertically delimited sweet spot, each viewer is able to move horizontally, vertically, and normally to the display without the perception of the associated stereo information content being affected by the neighboring information.
  • the quality of the displayed sweet spots and the stereo picture quality can also be improved by controlling the focusing matrix in terms of its optical properties.
  • the focusing matrix in terms of its optical properties.
  • it can continuously undergo a change of position in the normal direction and thus e.g. be adapted to a curvature of field.
  • the focusing matrix may be a two-dimensional lens array or, as here in Fig. 6, a double-lens array of two two-dimensional lens arrays having the same effect as the combination from the two crossed lenticulars.
  • the lens arrays each have a planar surface and a lens surface, the lens surfaces of the lens arrays focusing in the horizontal and vertical directions, as described in FIG. 2. Both lens surfaces are facing each other in this example.
  • the beam aimed from the viewer toward the viewer produces rectangular horizontal and vertical sweet spots in its viewer position after being detected by the position detector.
  • an aberration correction is achieved in conjunction with a field lens arranged in front of the image matrix.
  • the image matrix is modulated with the image information. This arrangement is also applicable to at least two observers, with each observer being presented with the picture information which applies to him without being disturbed by the sweet spots of the other observer.
  • Another embodiment is designed so that the illumination matrix is preceded by a lens or / and a field lens in order to achieve a better homogeneous light distribution of the focusing matrix.
  • a trained in the manner described autostereoscopic display with the sweet spot image separation device according to the invention is in addition to its usability in 2D and / or 3D mode, multi-user capability, free viewer mobility, real-time capability, high resolution, high brightness and lower Thanks to its robustness and the lack of mechanical parts, the design depth is drastically reduced in crosstalk, especially in multi-user operation. Because of its high image quality features and low crosstalk for every viewer, it is for high-end medical, technical, research and development, mid-range video conferencing and administrative applications , in financial institutions, insurance companies and in the low-end area as a home screen, suitable for videophones and many other applications. Applications which are not listed here are also covered by the invention, but on which the inventive principle is based.

Abstract

L'invention concerne des écrans autostéréoscopiques à utilisateurs multiples à affichage séquentiel, ces écrans étant constitués par une unité pour point idéal et une matrice d'images. L'unité pour point idéal, composée d'une matrice d'éclairage et d'une matrice de focalisation et disposée devant la matrice d'images, focalise des faisceaux de lumière presque parallèles en des points idéaux pour les yeux du spectateur. L'invention vise, grâce à des moyens optiques, à réaliser un suivi avec affectation claire des images auprès de spectateurs mutuellement séparés par un espace latéral moins important que l'écartement des yeux. La liberté de mouvement relativement à l'écran doit être conservée et les informations attribuées à un spectateur doivent être protégées des regards des autres. A cet effet, les points idéaux sont délimités horizontalement et verticalement par une matrice de focalisation comportant deux dispositifs lenticulaires L1 et L2 croisés ou un réseau de lentilles en deux dimensions disposées en forme de matrice, ou bien un double réseau de lentilles. Cette matrice de focalisation forme sur le plan de vision une matrice de points idéaux pourvue de paires de points idéaux délimités en deux dimensions et de toutes les positions de vision pouvant être commandées. Les écrans autostéréoscopiques de l'invention peuvent fonctionner en mode bidimensionnel ou tridimensionnel.
EP05714908A 2004-08-10 2005-01-24 Dispositif de separation d'images a point ideal pour ecrans autostereoscopiques a utilisateurs multiples Ceased EP1776837A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004038676 2004-08-10
PCT/DE2005/000139 WO2006015562A1 (fr) 2004-08-10 2005-01-24 Dispositif de separation d'images a point ideal pour ecrans autostereoscopiques a utilisateurs multiples

Publications (1)

Publication Number Publication Date
EP1776837A1 true EP1776837A1 (fr) 2007-04-25

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EP05714908A Ceased EP1776837A1 (fr) 2004-08-10 2005-01-24 Dispositif de separation d'images a point ideal pour ecrans autostereoscopiques a utilisateurs multiples

Country Status (4)

Country Link
US (1) US20070247590A1 (fr)
EP (1) EP1776837A1 (fr)
DE (1) DE112005002518A5 (fr)
WO (1) WO2006015562A1 (fr)

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