WO2015043098A1 - Système d'affichage tridimensionnel pour l'œil nu à angles de vision multiples et procédé d'affichage associé - Google Patents

Système d'affichage tridimensionnel pour l'œil nu à angles de vision multiples et procédé d'affichage associé Download PDF

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Publication number
WO2015043098A1
WO2015043098A1 PCT/CN2013/090603 CN2013090603W WO2015043098A1 WO 2015043098 A1 WO2015043098 A1 WO 2015043098A1 CN 2013090603 W CN2013090603 W CN 2013090603W WO 2015043098 A1 WO2015043098 A1 WO 2015043098A1
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WO
WIPO (PCT)
Prior art keywords
cylindrical lens
lens grating
scattering film
plane mirror
grating
Prior art date
Application number
PCT/CN2013/090603
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English (en)
Chinese (zh)
Inventor
张磊
唐邵
李凯
张永兵
Original Assignee
清华大学深圳研究生院
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Publication of WO2015043098A1 publication Critical patent/WO2015043098A1/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
    • H04N13/363—Image reproducers using image projection screens
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B35/00—Stereoscopic photography
    • G03B35/18—Stereoscopic photography by simultaneous viewing
    • G03B35/20—Stereoscopic photography by simultaneous viewing using two or more projectors
    • 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
    • G02B30/27—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 lenticular arrays
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B35/00—Stereoscopic photography
    • G03B35/18—Stereoscopic photography by simultaneous viewing
    • G03B35/24—Stereoscopic photography by simultaneous viewing using apertured or refractive resolving means on screens or between screen and eye
    • 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
    • H04N13/307—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

Definitions

  • the present invention relates to the field of computer vision technology and stereoscopic video, and in particular to a multi-view eye stereoscopic display system and a display method thereof. Background technique
  • Stereoscopic display is a technique for realizing the stereoscopic display of a scene by separately projecting different images in the left and right eyes and then virtualizing the depth information of the objects in the image.
  • a typical stereoscopic display has only one viewing angle, that is, the moving view or the viewing position does not increase the amount of information that the viewer can receive.
  • the multi-view stereoscopic display performs a certain modification on the device based on the ordinary stereoscopic display, so that the viewer can see different display images after moving a certain position or rotating a certain angle.
  • this display method has a certain gap compared with the holographic display of different pictures compared with 360 degrees, it has greatly improved compared with the ordinary single-view stereo display.
  • multi-view stereoscopic display technology at home and abroad is basically realized by using a projector array composed of multiple projectors.
  • Each projector only projects an image of a certain angle of view, and the image projected by the adjacent projector corresponds to the person's left and right.
  • the angle of view image seen by the eye as long as the person is standing at the proper position, the left and right eyes can just see the image projected by two adjacent projectors, realizing the stereoscopic display, and after changing the viewing position, another different stereoscopic shape can be seen.
  • the picture is such that multi-view stereoscopic display is realized.
  • the present invention provides a multi-view stereoscopic display system and display method for simulating a conventional multi-view stereoscopic image through a mirror mirror array reflection function.
  • the effect of multiple projectors in the system is displayed, thereby realizing multi-view stereoscopic display in a less projector environment, and the following technical solutions are adopted for the present invention.
  • a multi-view eye stereoscopic display system comprising: a laser projector for projecting light; a scanning system, receiving the laser projection to project a light and scanning into an image; and a plane mirror array, reflecting an image emitted by the scanning system, forming a multi-view image; a cylindrical lens grating system comprising a first cylindrical lens grating and a scattering film, the scattering film being located on a side of the first cylindrical lens grating facing away from the plane mirror array; each of the planar mirror arrays The image emitted by the plane mirror coincides on the first cylindrical lens grating.
  • the scanning system is a scanning galvanometer system.
  • the scanning galvanometer system includes a first galvanometer for line scanning, a second galvanometer for column scanning, and a third galvanometer for viewing angle.
  • the resolution of each image is M x L
  • the video frame rate is a
  • the plane mirror array includes the number of plane mirrors m
  • the first galvanometer rotation frequency is L xaxm Hz
  • the second galvanometer rotation frequency is am Hz
  • the third galvanometer rotation frequency is a Hz; a > 30.
  • the modulation frequency of the laser projector is M X L X a X m Hz.
  • cylindrical lens stop system further includes a second cylindrical lens stop, the scattering film being located between the first cylindrical lens light cabinet and the second cylindrical lens grating.
  • plane mirror array and the cylindrical lens grating system satisfy:
  • the plane mirror array includes the number of plane mirrors m, m > 2: the height of the virtual light-emitting points of each plane mirror is equally spaced, and the spacing is E; the distances of the virtual light-emitting points of the plane mirrors to the cylindrical lens grating are the same, the distance a cylindrical mirror of the first cylindrical lens stop and a cylindrical mirror of the second cylindrical lens grating having a refractive index n c ; the first cylindrical lens grating having a pitch of WS and a radius of curvature of R, The focal length is F, the thickness is H, the distance to the scattering film is D, and the horizontal width of the sub-image on the scattering film after the image reflected by each plane mirror passes through a cylindrical mirror of the first cylindrical lens grating WP; the second cylindrical lens grating has a pitch of Ws, a radius of curvature of r, a focal length of f, a thickness of h, a distance to the scattering film of d
  • a multi-view eye stereoscopic display method includes the following steps:
  • the plane mirror array reflects the image emitted by the scanning system to form a multi-view image
  • the multi-view image is projected on the cylindrical lens grating system, and after being scattered by the cylindrical lens grating system, the stereoscopic image can be seen by the eye.
  • the cylindrical lens grating system includes a first cylindrical lens grating and a scattering film, and the scattering film is located on a side of the first cylindrical lens grating facing away from the plane mirror array
  • the multi-view image is projected onto the scattering film via the first cylindrical lens stop, and the annihilation film is scattered and then emitted through the first cylindrical lens grating.
  • the cylindrical lens grating system may include a first cylindrical lens aperture, a second cylindrical lens grating, and a diffuse film, wherein the scattering film is located in the first cylindrical lens Between the grating and the second cylindrical lens grating; the multi-view image is projected onto the scattering film via the first cylindrical lens light, and the scattering film is scattered and then emitted through the second cylindrical lens grating .
  • the multi-view naked-eye stereoscopic display system of the invention simulates the working scene of multiple projectors by using a plane mirror array, and the light projected by the laser projector is projected onto the scanning system to complete the line scanning, the column scanning and the viewing angle scanning process respectively, and obtain different viewing angles. Images, which are reflected by the respective plane mirrors and then hit on the cylindrical lens grating system. A clear stereoscopic view can be seen at the appropriate position on the other side of the cylindrical lens cabinet system, and the stereoscopic view can be seen from different viewing positions. The scene is different, and the multi-view stereo display is realized. This process is achieved by human visual residual effects, using a laser projector Through the reflection of the plane mirror, the projection effect of multiple projectors working at the same time is simulated.
  • the multi-view eye stereoscopic display system and the display method thereof use the flat mirror array to replace the projector array in the traditional technology, which greatly saves cost and reduces energy consumption, and at the same time, since only one projector is used, the projector The size is unrestricted, enabling high-brightness shadows to be used in a variety of complex environments, such as outdoors.
  • FIG. 1 is a schematic structural view of a multi-view stereoscopic display system in the prior art
  • FIG. 2 is a projection effect diagram of the multi-view stereoscopic display system shown in FIG. 1;
  • FIG. 3 is a view showing a viewing effect of the multi-view stereoscopic display system shown in FIG. 1;
  • FIG. 4 is a schematic structural view of a front view of a multi-view stereoscopic display system in the prior art
  • FIG. 5 is a schematic structural view of an embodiment i of the multi-view stereoscopic display system of the present invention
  • FIG. 6 is a multi-view stereoscopic display system of the present invention.
  • FIG. 7 is a schematic view showing a plurality of projected rays in the embodiment 2 shown in FIG. 6;
  • FIG. 8 is a schematic structural view of Embodiment 3 of the multi-view eye stereoscopic display system of the present invention. County head should be 10,000
  • the multi-view stereoscopic display system includes three projectors 5, a first cylindrical lens grating 61, a second cylindrical lens grating 62, and a scattering film 63.
  • the first cylindrical lens optical bridge is located at the second cylindrical lens grating 62.
  • the scattering film 63 is located between the first cylindrical lens grating 61 and the second cylindrical lens grating 62, and the multi-view stereoscopic display system can realize stereoscopic display of three viewing angles.
  • the pitch is E
  • the projectors are not parallel, and are at an angle, so that The images projected by each projector can be completely coincident on the first cylindrical lens grating, as shown in FIG.
  • the distance from each projector to the pupil of the first cylindrical lens is L.
  • First cylindrical lens light The specific parameters of the grid are as follows: the pitch is WS, the radius of curvature is D to the scattering film, the focal length is F, the thickness is H, and the image reflected by each plane mirror passes through a cylindrical mirror of the first cylindrical lens grating.
  • the horizontal width of the sub-image on the scattering film is WP.
  • the width of the scattering film that can be seen by the lenticule is Wp.
  • the observer is located on the right side of the second cylindrical lens grating: the distance from the human eye to the second cylindrical lens grating is [[, the human eye spacing is e.
  • the two-view stereoscopic projection display realized by the three projectors shown in FIG. 3 can provide three parallaxes for the optimal position of two stereoscopic images, and the stereoscopic images seen at the two positions have different viewing angles, thereby Realize multi-view stereo display.
  • FIG. 4 a schematic structural view of another embodiment of a multi-view stereoscopic display system in the prior art is shown.
  • the arrangement of the projector and the cylindrical lens grating system can be seen with reference to Figures 1-3 and its description.
  • Embodiment 1 of a multi-view stereoscopic display system which includes a laser projector, a U-scan system, a flat mirror array, and a cylindrical lens grating system 4.
  • the laser projector 1 is used for projecting light.
  • the laser projector is composed of an RGB three-color laser, a modulator, a synthesizer, a projection lens, etc., and the laser emitted by the three-monochrome laser is subjected to beam expansion and shimming de-phase pretreatment. Then, the modulator is modulated into light of a specific intensity, and then merged into a beam of light by a synthesizer such as an X prism and a subsequent projection lens, thereby realizing modulation of light and synthesis of full color.
  • a synthesizer such as an X prism and a subsequent projection lens
  • the light from the laser projector is in a fixed direction. In order to obtain an image of each angle of view, the emitted light needs to be scanned.
  • the commonly used scanning system includes a high frequency prismatic reflecting glass of Symbol and a galvanometer, etc., in the first embodiment.
  • the scanning system is a scanning galvanometer system comprising a first galvanometer 21, a second galvanometer 22 and a third galvanometer 23 for row scanning, column scanning and viewing angle scanning, respectively.
  • the image is projected onto the scanning galvanometer system by the laser projector, and the light emitted by the laser projector passes through the line scanning of the first galvanometer 21, the column scanning of the second galvanometer 22, and the scanning of the angle of view of the third galvanometer 23,
  • the triode mirror 23 forms a series of plane images corresponding to different viewing angles in the order of scanning.
  • the plane mirror array includes at least two plane mirrors 31 that reflect the image emitted by the scanning system to form a multi-view image.
  • the cylindrical lens grating system 4 includes a first cylindrical lens grating 41, a second cylindrical transmission grating 42 and a scattering film 43, the first cylindrical lens grating 41 being located on the left side of the second cylindrical transmission grating 42, and the scattering film 43 being located
  • the first cylindrical lens grating 41 and the second cylindrical surface transmission grating 42 are arranged; the images emitted by the respective plane mirrors 31 of the plane mirror array are superposed on each other on the first cylindrical lens light booth 41.
  • the resolution ⁇ XL of each viewing angle is 1024 X 768
  • the video frame rate a is 30, and the number of plane mirrors included in the plane mirror array, that is, the number of viewing angles is m
  • the modulation frequency that the laser projector should have is scanning.
  • the frequency is MMX a m-1024 768 30m Hz
  • the first galvanometer rotation frequency is L xax m-768 x 30m Hz
  • the second galvanometer rotation frequency is axm -30m Hz
  • the third galvanometer rotation frequency is 30Hz
  • the frame refresh rate of 30 frames per second is obtained, so that the human eye can watch normally without any discomfort.
  • the video frame rate a may also be greater than 30.
  • the virtual light-emitting points 10 of the plane mirrors 31 are equally spaced, and the distances from the virtual light-emitting points 10 of the plane mirrors 31 to the first cylindrical lens grating 41 are the same, and the virtual light-emitting points 10 are The light corresponding to the image reflected by a plane mirror extends in a reverse direction to the virtual intersection formed by the plane mirror.
  • each plane mirror of the column is the same as that of the projector in the multi-view stereoscopic display system in the prior art, and the virtual light-emitting point corresponding to each plane mirror is equivalent to the multi-view stereo in the prior art shown in FIG. 1-3 corresponding to the plane mirror. Display the projector in the system.
  • the light emitted by the scanning galvanometer system is struck on the plane mirror array, and after being reflected by the plane mirrors 31, the corresponding virtual projector, that is, the image emitted by the virtual light-emitting point 10 is simulated and projected on the cylindrical lens grating system 4, so that A stereoscopic picture is seen on the other side of the cylindrical lens grating system 4.
  • a multi-view stereoscopic display system When installing a multi-view stereoscopic display system, first select a laser projector, arrange a scanning galvanometer system, and then arrange a plane mirror array and a cylindrical lens optical bridge system.
  • the virtual light-emitting point is equivalent to the projector in the prior art shown in FIG. 1-3, and the arrangement of the projector and the cylindrical lens light cabinet system of the multi-view stereoscopic display system in the prior art shown in FIG.
  • the spatial distribution of the virtual light-emitting point and the cylindrical lens grating system is obtained.
  • the plane mirror system is installed according to the distribution of the virtual light-emitting point and the scanning galvanometer system, and it is confirmed that the plane mirror does not block the optical path of other view images, thereby completing the arrangement of the plane mirror array and the cylindrical lens grating system.
  • the specific parameters of the spatial distribution of the virtual light-emitting point and the cylindrical lens grating system are shown in Figs. 1-3 and their descriptions, and will not be described again.
  • the laser projector projects light to the scanning galvanometer system; the scanning galvanometer system emits an image generated by sequential time division; the plane mirror array. the image emitted by the reflective scanning galvanometer system forms a multi-view image; The image is projected onto the scattering film by the first cylindrical lens grating, and the scattering film is scattered and then emitted through the second cylindrical lens grating, so that the stereoscopic image can be seen by the eye.
  • the light projected by the laser projector enters the A2 region from the Ai region, passes through the scanning system in the A2 region, and enters the A3 region, and is reflected by the plane mirror system of the A3 region to the cylindrical lens grating system of the A4 region, that is, The stereoscopic picture can be seen from the eye on the right side of the cylindrical lens grating system.
  • FIG. 6 is a schematic structural diagram of Embodiment 2 of a multi-view stereoscopic display system according to the present invention, which respectively shows a projection mirror for placing a plane mirror for simulating the top projector and simulating a plane mirror array.
  • the projected light lines of a plurality of projectors differ from the first embodiment in the spatial distribution of the laser projection only, the scanning galvanometer system, the plane mirror array and the cylindrical lens grating system, and the spatial distribution is still according to the arrangement in the embodiment 1.
  • the completion of the request enables a stereoscopic picture to be seen from the right eye of the cylindrical lens grating system.
  • FIG. 8 is a schematic structural diagram of Embodiment 3 of a multi-view stereoscopic display system according to the present invention.
  • Embodiments 1 and 2 implement multi-view stereoscopic display by using a rear projection method, and Embodiment 3 adopts a positive The projection method realizes stereoscopic display of multi-view eyes.
  • the multi-view naked-eye stereoscopic display system also includes a laser projector] U-scan galvanometer system, plane Mirror array and cylindrical lens grating system 4, laser projector, scanning galvanometer system and plane mirror array are located on the same side of the cylindrical lens grating system as the observer, and the cylindrical lens grating system only needs to include the first cylindrical lens grating 41 and The scattering film 43.
  • the virtual light-emitting points corresponding to the plane mirrors 31 of the plane mirror array are equivalent to the projector shown in FIG. 4, and then according to the arrangement of the laser projector, the scanning galvanometer system, and the arrangement of the projector and the cylindrical lens grating system in FIG. The spatial distribution of the laser projector, scanning galvanometer system, flat mirror array and cylindrical lens grating system is obtained.
  • the multi-view naked-eye stereoscopic display the laser projector projects light to the scanning galvanometer system; the scanning galvanometer system emits images generated by sequential time division; the plane mirror array reflects the image emitted by the scanning galvanometer system to form a multi-view image;
  • the first cylindrical lens illuminator is projected onto the scattering film, and the scattering film is scattered and then emitted through the first cylindrical lens grating, so that the stereoscopic image can be seen with the naked eye.

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

Abstract

L'invention concerne un système d'affichage tridimensionnel pour l'œil nu à angles de vision multiples et un procédé d'affichage associé. Le système d'affichage tridimensionnel comprend : un projecteur à laser (1) qui est utilisé pour projeter un rayon de lumière ; un système de balayage qui reçoit le rayon de lumière projeté par le projecteur à laser et balaye celui-ci afin de générer une image ; un arrangement de miroirs plans qui réfléchit l'image émise par le système de balayage de telle manière à former une image à angles de vision multiples ; et un système de réseau à lentille cylindrique (4) qui comprend un premier réseau à lentille cylindrique (41) et un film de dispersion (43). Le film de dispersion se trouve d'un côté du premier réseau à lentille cylindrique, avec le dos dirigé vers l'arrangement de miroirs plans. Des images émises par différents miroirs plans (31) dans l'arrangement de miroirs plans coïncident par paires sur le premier réseau à lentille cylindrique. Le système d'affichage tridimensionnel pour l'œil nu à angles de vision multiples et le procédé d'affichage associé adoptent l'arrangement de miroirs plans pour remplacer un arrangement de projecteur dans la technologie traditionnelle, réalisant ainsi d'importantes économies de coût et réduisant la consommation d'énergie. En même temps, du fait qu'un seul projecteur est utilisé, la taille du projecteur ne sera pas limitée, ce qui permet d'obtenir une projection à haute luminosité et, par conséquent, le système d'affichage tridimensionnel et le procédé peuvent être utilisés dans différents environnements complexes tels que des environnements à l'extérieur.
PCT/CN2013/090603 2013-09-25 2013-12-26 Système d'affichage tridimensionnel pour l'œil nu à angles de vision multiples et procédé d'affichage associé WO2015043098A1 (fr)

Applications Claiming Priority (2)

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CN201310441028.4 2013-09-25
CN201310441028.4A CN103513438B (zh) 2013-09-25 2013-09-25 一种多视角裸眼立体显示系统及其显示方法

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CN109725430B (zh) * 2019-03-06 2023-04-07 成都工业学院 一种虚聚混合成像的立体显示装置
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