WO2005106563A2 - Systeme pour observer des images stereoscopiques - Google Patents

Systeme pour observer des images stereoscopiques Download PDF

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Publication number
WO2005106563A2
WO2005106563A2 PCT/CH2005/000253 CH2005000253W WO2005106563A2 WO 2005106563 A2 WO2005106563 A2 WO 2005106563A2 CH 2005000253 W CH2005000253 W CH 2005000253W WO 2005106563 A2 WO2005106563 A2 WO 2005106563A2
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WO
WIPO (PCT)
Prior art keywords
lcd element
screen system
screen
pixels
eye
Prior art date
Application number
PCT/CH2005/000253
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German (de)
English (en)
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WO2005106563A3 (fr
Inventor
Jürgen SPIELBERGER
Original Assignee
Spielberger Juergen
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 Spielberger Juergen filed Critical Spielberger Juergen
Publication of WO2005106563A2 publication Critical patent/WO2005106563A2/fr
Publication of WO2005106563A3 publication Critical patent/WO2005106563A3/fr

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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
    • H04N13/32—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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
    • G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
    • G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
    • G02B30/30—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving parallax barriers
    • G02B30/31—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving parallax barriers involving active parallax barriers

Definitions

  • the invention relates to a system for viewing stereoscopic images for at least one observer according to the preamble of claim 1.
  • This concept of stereoscopy is used to describe all methods and techniques for the production and reproduction of three-dimensional images based on the principle of two-eye natural vision.
  • the distance between the two eyes allows one to see an object from a slightly different angle than with the other the right eye; these perspectively different views are merged in the visual center of the brain into a single plastic perception.
  • this process is imitated by means of two images whose per- sponse corresponds to the distance between the eyes.
  • these stereoscopic partial images must be presented to the eyes separately, so that the left eye only sees the left image and the right eye only the right image.
  • SIS Single Image Stereograms
  • RDS Random Dot Stereograms
  • SIRDS Single Image Random Dot Stereograms
  • Applications for three-dimensional screen viewing include all kinds of games and simulations for pleasure, for illustrating reality representations or as training, in particular driving and flight simulators, sports simulators, observations of complex molecules, of architectural works or of three-dimensional components For example, were constructed by CAD, or realistic animated computer games.
  • the image impressions are produced directly in front of the eyes, head-mounted systems. This can be a clean spatial impression win, however, the viewer must keep an apparatus in mind or wear.
  • the images are generated independently of the head, e.g. on an ordinary screen, the images are then separated by means of special glasses immediately before the eyes, for example by different polarization, color filters or scutter glasses. In this case, the user must always wear glasses.
  • systems use optical mechanisms to create two or more perspectives directly on the screen. These include the widely used approaches with upstream lens grids and systems with diffraction grids.
  • the fourth category includes all systems with parallex Barrier. This is a well-known technology, described for example in DE 198 36 889, EP 0 833 183, WO 02/09442, or WO 01/18589.
  • the images to be projected are subdivided into sub-images. Barriers, using an eye distance of about 65 mm to an observer, prevent everyone from looking at subsections intended for the other eye. As a result, an independent image can be generated for each eye, so that a spatial impression is created for the viewer.
  • Various methods have also been developed in which no dissolution losses occur. However, these methods are technically very complex and therefore expensive, or they have undesirable effects such as flickering or low location tolerance.
  • the object of the present invention is to describe a screen, which allows a viewer a three-dimensional viewing of images, without one eye or both eyes is prevented by partial barriers the view of certain areas, or screen contents.
  • Double rotation Two LCD elements are arranged at a defined distance in such a way that the viewer always looks at two different pixels of the front and rear LCD element for each eye and pixel for defined viewing angles when looking at the screen. Due to the correct combination of different angles of rotation of the polarized light in the two pixels (double rotation, double rotation), different brightness values per pixel can be represented for defined viewing angles, whereby an independent image can be displayed per eye.
  • a screen of any type as a rear element is understood as a special case of the double rotation. In this case, the angle of rotation of this rear element, since this then can no longer exert rotation, always 0 °.
  • Head Tracking In order to optimize the freedom of movement of the observer in the viewing area, suitable means can be used to exact position of the head and / or eyes are determined. With precise knowledge of these positions, the display on the screen is controlled in such a way that the viewer receives an optimal view, which leads to a three-dimensional perception and allows the viewer optimal freedom of movement.
  • Fig. 1 is a schematic representation of the beam paths of the two eyes through the screen, viewed from above;
  • Figure 2 is a schematic representation of a pair of eyes in front of a screen viewed from above, to produce two images, with static light-dark areas.
  • Figure 3 is a schematic representation of a pair of eyes in front of a screen, viewed from above, for generating two images, with an LCD element in the background, for generating dynamic light-dark areas.
  • FIG. 4 shows a schematic representation of a pair of eyes in front of a screen, viewed from above, for producing two images, with a screen of any construction in the background, for generating dynamic light-dark areas;
  • Fig. 5 is a schematic representation of a pair of eyes in front of a screen, viewed from above, expanded to produce two images, with lenses.
  • Fig. 6 is a schematic representation of a pair of eyes in front of a screen, viewed from above, to produce two images, extended with lenses and high-resolution, rear LCD element.
  • Fig. 7 is a schematic representation of an eye in front of a screen, viewed from above, to produce seven images (perspectives), with lenses extended and high-resolution, rear LCD element.
  • FIG. 8 As in FIG. 7, but with the seven partial images being symmetrically projected as a function of the eye position.
  • Fig. 10 is a schematic representation of an eye in front of a screen, viewed from above, for the generation of 13 images (perspectives), extended with lenses, with high-resolution, rear LCD element and integrated grid (dark areas).
  • FIG. 11 Like FIG. 10, but with a dynamically designed, pre-stored grid.
  • FIG. 11 Like FIG. 10, but with a dynamically designed, pre-stored grid.
  • Fig. 12 is a diagrammatic representation of an eye in front of a screen viewed from above to produce 12 images (perspectives), with lenses extended, with high resolution rear LCD and integrated grid (dark areas), but without real Double turn.
  • FIG. 13 like FIG. 11, but taking into account the subpixels for color representation.
  • FIG. 14 is a diagrammatic representation of an eye in front of a screen viewed from above to produce 6 images (perspectives), with lenses extended, with high-resolution rear LCD element and pre-grid, with no real double rotation, but taking into account the subpixel for color representation with optimized subpixel distribution.
  • Fig. 16 is a schematic representation of a pair of eyes in front of a screen, viewed from above, to produce two images, with lenses extended, with high-resolution, rear LCD element and upstream raster, but taking into account the subpixels for color representation with optimized distribution of subpixels.
  • Fig. 18 A schematic representation of the beam path in colored and rotated by 90 ° subpixels in the front and rear LCD element.
  • Fig. 19 As Fig. 18, but with lens extended.
  • Fig. 20 is a schematic representation of a pair of eyes in front of a screen, viewed from above, ' to produce two images, extended with lenses, wherein the subpixels of the front and the rear LCD element are colored and mutually rotated by 90 °.
  • Fig. 21 As Fig. 20, but viewed from the side (cross section).
  • FIG. 22 shows a schematic illustration of a pair of eyes in front of a screen, viewed from above, for producing two images, expanded with lenses, without real double rotation, the subpixels of the front LCD being Element and the rear screen of any type colored and rotated against each other by 90 °.
  • Fig. 23 As Fig. 23, but with the lens grid in front of the rear LCD element.
  • FIG. 24 Schematic representation of a position determination system
  • a schematic arrangement of the inventive screen system is described in which by means of two LCD elements 2, 3, a 3D screen system is realized.
  • the incidence of light is indicated in these figures, each from the left, so by a viewer, which is located to the right of the screen system, from behind. Since the LCD elements 2, 3 are able to rotate the polarization direction of the incident light at desired angles, the polarization direction can then be used to control the light components for the two eyes. Birefringence and elliptical polarization are neglected in the embodiment for simplicity. In Figure 1, the principle of operation is shown.
  • the polarizing filters 8 may both be horizontally aligned. If the pixel pvi for the left eye, which is represented by beam path li and is located at a distance b from the front LCD element, now appears in the color white, then the light polarized by polarization filter 8 has to pass through the pixels from the left pi and hi of the LCD elements are rotated by a multiple of 180 °. Only in this way can the light penetrate completely through the right-hand polarization filter 8, since it has previously been horizontally aligned by the polarization filter 8 on the left. In the following it will now be assumed that go, the pi and phl turn the light by 0 °. Based on this definition, the desired rotation angle of pv 2 can now be determined.
  • the light must be rotated by the pixels phi and pv 2 by 90 ° to the horizontal polarizing filter. Since phi rotates the light by 0 °, pixel pv 2 must therefore turn the light by 90 °. If this pixel pv 2 for the left eye in the beam path 1 2 but appear in white, the pixel ph 2 must turn the light by 90 °, so that in the beam path 1 2 results in a total rotation of 180 ° and the light pass completely again can. In this way it can be determined in succession for each pixel 6 which rotation of the polarization direction of the light is to take place through the pixels 6. Intermediate values of the rotation angles can also be used to generate arbitrary gray values for the two eyes. By combining the pixels 6 in the three basic colors with corresponding saturations and intensities, all colors can be produced.
  • each pixel phi to ph 4 is hit only by a maximum of two beam paths. This is possible, for example, if either an opaque distance exists between the pixels phi to ph 4 or pvi to pv 5 or between the two.
  • FIG. 2 shows a possible arrangement of the pixels 6 and of the dark regions 4. The beam paths 5 of the left eye A and the beam paths 5 'of the right eye A' are shown. The two images for the left and right eye, which are at a distance z to each other, can now be displayed simultaneously. This makes it possible to produce a flicker-free 3D screen, as no system-related, rapidly moving barriers prevent the eyesight of an area of the screen.
  • the front LCD element 2 can be used as an ordinary 2D monitor.
  • the screen only displays the correct three-dimensional image at certain locations, so-called sweet spots.
  • the dark areas 4 are not designed to be static but are dynamically designed, for example, by a further LCD element, which may be behind the rear LCD element 3 or in front of the front LCD element 2.
  • the dark areas are now tracked to the position of the viewer, so that it is always in the 'sweet spot'.
  • FIG. 3 shows this solution, in which initially a screen 1, for example an LCD, is arranged, which blocks the dark areas 4 as a function of the eye position.
  • the previously indicated solution is less suitable since the pixels 6 can then be affected by more than two beam paths.
  • additional LCD elements 2 without polarization filter can be inserted.
  • the number of viewers can basically be increased as desired.
  • a lenticular grid 9 which is subdivided vertically and / or horizontally, can also be mounted behind the front LCD element 2, whereby different angles of rotation possible are.
  • This lenticular grid 9 may be mounted in a first arrangement, for example, immediately behind the front screen.
  • FIG. 5 shows how thereby the area affected on the back LCD panel 3 drastically can be downsized. If the resolution of the rear LCD element 3 is somewhat better than that of the front LCD element 2, then it can be fundamentally ruled out that one pixel of the LCD element 3 is hit by more than two beam paths.
  • Another advantage of this arrangement is that the use of the lenses probably only a small portion of the rear LCD element is used for a beam path to one of the eyes, but on the other hand, the entire image area of the lens is filled with this image information. Accordingly, depending on the viewing angle, each of these surfaces alters the brightness and / or the color without a pixel 6 of the rear screen being hit by more than one beam path. This situation can be used in different ways.
  • the resolution of the rear LCD element 3, as shown in Fig. 6, can be further increased.
  • the adjoining pixels 6, which are not directly located in the beam path can likewise be provided with the rotation angle of the nearest pixel lying in the beam path, so that a lateral error tolerance arises.
  • this arrangement can be used without determining the position of the eyes, but the viewer must then be in a defined area.
  • the screen can not only use to represent two perspectives, but it can also, if desired, multiple perspectives are displayed simultaneously.
  • Fig. 7 shows how at six times higher resolution of the rear LCD element 3 seven perspectives (factor higher resolution plus 1) can be generated. If several perspectives are displayed at the same time, the screen within the viewing area can be used by one or more observers regardless of position. The screen can therefore dynamically display two or three more perspectives are used, depending on the current requirement.
  • pixels 6 of the LCD element 3 are used to generate two beam paths, but only the pixels 7 at the edge of the visibility range.
  • the pixels 6 in the interior of the visibility range are based on the given angle of rotation of the front pixel 2.
  • the perspectives can continue to be tracked by means of head tracking, as shown in FIG.
  • the eye A of the observer is shifted to the left, the projected perspectives follow the eye and are directed more to the left.
  • the raster can also be shifted stepwise so that eventually all the pixels are displayed correctly in rapid succession (e.g., 30 times per second).
  • Fig. 12 shows how this approach can be implemented if the double rotation is completely eliminated.
  • a screen of any type can be used for the rear screen 1.
  • an ordinary LCD screen supplemented by a rear lenticular grid 9, is used again.
  • each pixel of a screen can consist of three subpixels in the three basic colors red, green and blue in all the above-mentioned embodiments. If no lens is used, or the lens is exactly the size of a single subpixel, for example, the subpixels of the front LCD element are colored, the rear element is designed without colors.
  • a single lens comprises two or more subpixels of different color
  • only one specific color eg, red
  • the other remaining colors are shown as dark areas 4.
  • the resolution in 3D mode is greatly reduced.
  • the resolution is therefore reduced by a factor of 6.
  • Fig. 14 shows how an asymmetrical arrangement of the subpixels prevents these effects. By an asymmetrical arrangement, therefore, the crosstalk can be reduced and at the same time the luminous subpixels are distributed more evenly.
  • Fig. 15 shows again how, without the use of double rotation, with a screen 1 of any type an equivalent solution can be created. Instead of seven perspectives as in Fig. 14, only six perspectives can be formed here. These numbers are sample values and are by no means limitations on the screen system. Of course, the same approach can also be used if only two perspectives are to be formed.
  • Fig. 16 is shown how the unwanted subpixels are hidden. The pixels 6 of the rear LCD element 3 are hit by at most two beam paths.
  • Fig. 17 shows the identical solution with a screen 1 of any type in place of the rear LCD element.
  • the subpixel 11 of the front LCD element 2 is not transparent to light from the subpixels 12 and 13 of the rear LCD element 3, so that these subpixels 12 and 13 from the perspective of pixel 11 of the front LCD element 2 can be neglected. Although a single subpixel is hit by more than two optical paths, it is hit twice by beam paths of the same color. Instead of rotating the orientation of the subpixels, you can achieve a similar effect by simply rotating the lenticular grid.
  • FIG. 19 shows exactly one lens 9 with the associated subpixels 11, 12 and 13.
  • FIG. 20 shows the overall solution from above, the subpixels 11, 12 and 13 being arranged one below the other in the rear LCD element 3.
  • Fig. 21 the situation is shown from the side, now are the subpixels 11, 12 and 13 of the front LCD element 2 in a row.
  • FIG. 22 shows how the subpixels 11, 12 and 13 in the rear screen 3 are aligned side by side and in the front LCD element 2 one above the other.
  • the pixels may be imaged on the edge of a lens as opaque. visible areas 4 are formed, so that a crosstalk is prevented.
  • FIG. 24 shows the same solution as FIG. 22, but with the lenticular grid 9 newly placed in front of the rear screen 1. If the rear screen 1 is a transparent LCD element 3, the lens grid 9 can also be arranged behind the rear LCD element 2 with suitable backlighting.
  • the viewer typically moves in a particular area in front of the screen. If the exact position of his eyes A, A 'in the projection of two or more perspectives known, the display on the screen can be optimized so that the viewer always receives a correct spatial impression.
  • the head and eye position of the observer is determined by a combination of algorithms of image processing relative to the screen. It uses the techniques known in the trade as mean-shift trackers, adaptive background elimination and color blob trackers. By using two cameras (stereo image) you can determine the distance of the observer, the angle at which he is to the screen, as well as a possible direction of movement. If the eyes themselves can not be recognized by means of image processing, but the head as such, the eyes are placed in the recognized head, taking into account any detected movements with standing values according to the distance of the eyes and the vertical position. It is crucial that the screen 1 knows the direction of the images to be formed with sufficient accuracy.
  • the maximum permissible deviation is about plus or minus 2 to 3 centimeters per eye resp. each pupil, depending on different parameters, at best half the eye distance.
  • the system must be extended to four cameras.
  • Fig. 25 shows such a possible arrangement.
  • S, T cameras are mounted at two locations, each covering a detection area si and ti. A person can be detected if they are in the intersection of these two areas.
  • a second pair of cameras in the same places S and T zoom in on the area of the head that has already been detected, thus capturing the eyes of the beholder.
  • the first two cameras serve only a first, approximate positioning and control two moving cameras with horizontal orientation and zoom, for example with • stepper motors on the viewer.
  • a resolution of 1 000 x 1 000 pixels and a required resolution of 0.25 mm this results in an image area of 25 x 25 cm of the second cameras, that is about one head size. This shows that with the extension of the camera system by two additional high-resolution cameras the determination of the eye position is a feasible task.
  • Observers and in particular the eyes A, A ' would be accessible with the help of infrared cameras, ultrasound, radar or other distance measuring devices.
  • the viewer only has to be in the detection cone of at least two positioning devices so that the screen system can be controlled accordingly. Using a plurality of such positioning devices, the freedom of movement of the viewer can be increased again.
  • the detection angle of each camera can be smaller, whereby the resolution is increased with the same number of pixels.
  • the position In the absence of position determination of the eyes A, A ', the position must be assumed. This can be useful, for example, if the application is a driving or flight simulation system is, in which the pilot goes into a seat provided for it and under certain circumstances also buckles. With predetermined head restraints that can be adjusted to the size of the body, the head and in particular the eye position can be determined relatively well or initially determined precisely, without the use of a camera system. Specifically, it should be noted that the height of the eyes is less relevant for screens without a true double turn than the left-right position.
  • the inventive screen system can be used by existing technologies as a flat screen.
  • This system can be used in 2D mode and parts of it, or even completely, in 3D mode.
  • the system also offers full resolution in 3D mode, requires only 2 LCD elements and is flicker-free. It does not require any rapidly changing LCD elements and has no moving parts. It can be tracked by head tracking the position of the viewer and can create two or more perspectives for one or more observers.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)

Abstract

L'invention concerne un système d'écran pour l'observation d'images stéréoscopiques sans scintillement par les deux yeux (A, A') d'un observateur, au moins, placé à une certaine distance (b) de ce système d'écran. Ce système d'écran comprend, vu à partir de l'observateur, un élément à cristaux liquides avant (2) et au moins un élément à cristaux liquides arrière (3), ces deux éléments à cristaux liquides (2, 3) étant disposés en parallèle, à une certaine distance (a) l'un de l'autre et présentant chacun une pluralité de pixels (6) disposés en une grille, lesquels peuvent être commandés individuellement pour faire tourner la lumière polarisée incidente selon un angle de rotation souhaité, ainsi qu'au moins deux filtres de polarisation (8). Dans ce système d'écran, un filtre de polarisation (8) est placé en face de l'élément à cristaux liquides avant (2), au moins un filtre de polarisation (8) est placé derrière l'élément à cristaux liquides arrière (3), et aucun filtre de polarisation (8) n'est placé entre les deux éléments à cristaux liquides (2, 3).
PCT/CH2005/000253 2004-05-05 2005-05-04 Systeme pour observer des images stereoscopiques WO2005106563A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH793/04 2004-05-05
CH7932004 2004-05-05

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WO2005106563A2 true WO2005106563A2 (fr) 2005-11-10
WO2005106563A3 WO2005106563A3 (fr) 2006-03-16

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010068361A1 (fr) * 2008-12-11 2010-06-17 Alcatel-Lucent Usa Inc. Procédé de technique d'affichage tridimensionnel amélioré
DE102009009443B3 (de) * 2009-02-14 2010-09-23 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Monitor und Verfahren zum Darstellen autostereoskopisch wahrnehmbarer Bilder
CN102854625A (zh) * 2012-07-18 2013-01-02 友达光电股份有限公司 立体显示装置
CN102854626A (zh) * 2011-06-29 2013-01-02 四川大学 一种裸视光栅二维三维兼容显示装置
WO2016004728A1 (fr) * 2014-07-08 2016-01-14 京东方科技集团股份有限公司 Appareil d'affichage
CN110959132A (zh) * 2017-05-27 2020-04-03 李汶基 使用反射镜的眼镜型透明显示器

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0833183A1 (fr) * 1996-09-27 1998-04-01 Sharp Kabushiki Kaisha Modulateur spatial de lumière du type LCD servant de barrière parallaxial èlectronique
WO2001018589A1 (fr) * 1999-09-07 2001-03-15 3Ality, Inc. Systemes et procedes de vision tridimensionnelle
WO2002009442A1 (fr) * 2000-07-21 2002-01-31 New York University Affichage autostereoscopique

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0833183A1 (fr) * 1996-09-27 1998-04-01 Sharp Kabushiki Kaisha Modulateur spatial de lumière du type LCD servant de barrière parallaxial èlectronique
WO2001018589A1 (fr) * 1999-09-07 2001-03-15 3Ality, Inc. Systemes et procedes de vision tridimensionnelle
WO2002009442A1 (fr) * 2000-07-21 2002-01-31 New York University Affichage autostereoscopique

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010068361A1 (fr) * 2008-12-11 2010-06-17 Alcatel-Lucent Usa Inc. Procédé de technique d'affichage tridimensionnel amélioré
CN102246085A (zh) * 2008-12-11 2011-11-16 阿卡特朗讯美国公司 经改善三维显示技术的方法
US8587639B2 (en) 2008-12-11 2013-11-19 Alcatel Lucent Method of improved three dimensional display technique
DE102009009443B3 (de) * 2009-02-14 2010-09-23 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Monitor und Verfahren zum Darstellen autostereoskopisch wahrnehmbarer Bilder
CN102854626A (zh) * 2011-06-29 2013-01-02 四川大学 一种裸视光栅二维三维兼容显示装置
CN102854625A (zh) * 2012-07-18 2013-01-02 友达光电股份有限公司 立体显示装置
WO2016004728A1 (fr) * 2014-07-08 2016-01-14 京东方科技集团股份有限公司 Appareil d'affichage
US9638925B2 (en) 2014-07-08 2017-05-02 Boe Technology Group Co., Ltd. Display apparatus
CN110959132A (zh) * 2017-05-27 2020-04-03 李汶基 使用反射镜的眼镜型透明显示器

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