WO2021139204A1

WO2021139204A1 - Three-dimensional display device and system

Info

Publication number: WO2021139204A1
Application number: PCT/CN2020/115172
Authority: WO
Inventors: 卢增祥
Original assignee: 亿信科技发展有限公司
Priority date: 2020-01-06
Filing date: 2020-09-15
Publication date: 2021-07-15
Also published as: CN111158162B; CN111158162A

Abstract

A three-dimensional display device (100) and a system. The three-dimensional display device (100) comprises: a turntable (10), the turntable (10) being configured to rotate around the center axis (L1) of the turntable (10), and the center axis (L1) extending in the vertical direction; a light rod (70), fixed on the turntable (10); the light rod (70) being configured to emit lights independently in at least two directions, thus forming at least two viewpoints; the light rod (70) comprising a light board (20) and a unidirectional scattering screen (30); and, the unidirectional scattering screen (30) being arranged at the periphery on the side of the light board (20) away from the center axis (L1) and being arranged on a light-shining path of the light board (20).

Description

Three-dimensional display device and system

This disclosure claims the priority of a Chinese patent application filed with the Chinese Patent Office with an application number of 202010009094.4 on January 6, 2020, and the entire content of the above application is incorporated into this disclosure by reference.

Technical field

This application relates to three-dimensional display technology, for example, to a three-dimensional display device and system.

Background technique

Among related technologies, naked-eye 3D display is mainly realized by using the principles of holography, lenticular grating, volumetric 3D, integrated imaging, etc. From the perspective of the above naked-eye 3D realization principles, there are the following main problems that limit the application and development of naked-eye 3D: holographic technology is Hungarian scientist Dennis Gabor invented a three-dimensional display technology that uses the interference and diffraction principles of coherent light to record and reproduce three-dimensional images of objects. Although holographic technology is the most realistic 3D display technology, the structure of the coherent light source required for its display is more complex and due to the data Real-time display cannot be realized due to huge amount. The lenticular lens display uses the refraction effect of the cylindrical lens to separate the left and right eye images, and uses the parallax to produce a 3D visual effect. However, this display method has a small number of viewpoints, and usually the viewpoints are not continuous when viewed, and the visual effect is not perfect. Volumetric 3D technology uses high-speed rotating transparent projection screens and the persistence effect of human eyes to combine the 2D image sequences projected on the projection screen by the projector in space to achieve 3D display. However, the system preparation is more difficult and costly. Higher, it is more difficult to achieve large-scale and high-resolution three-dimensional display. The integrated imaging technology is a naked eye 3D display technology that uses a microlens array arranged periodically in a plane to record and reproduce true three-dimensional stereoscopic images. However, it has problems such as a small viewing angle and low depth resolution.

In recent years, super multi-view stereoscopic displays (SMV) based on lenticular lenses have gradually become the mainstream direction of 3D display. This technology increases the number of viewpoints as much as possible to provide smooth stereoscopic parallax images. However, in related technologies The resolution of the projection device or the flat panel display device in the 3D display greatly limits the spatial resolution of the 3D display.

Summary of the invention

The embodiments of the present application provide a three-dimensional display device and system to increase the number of viewpoints of three-dimensional display and improve the spatial resolution.

In the first aspect, an embodiment of the present application provides a three-dimensional display device, including:

A turntable, the turntable is configured to rotate around a central axis of the turntable, the central axis extending in a vertical direction;

A light pole fixed on the turntable; the light pole is configured to independently emit light in at least two directions in a horizontal plane to form at least two viewpoints; the light pole includes a light board and a unidirectional scattering screen;

Wherein, the one-way scattering screen is located on the periphery of the light board on a side away from the central axis, and is located on the light exiting path of the light board.

Optionally, the unidirectional scattering screen includes a first lenticular grating, and the first lenticular grating includes a plurality of first cylindrical mirrors extending along a first direction, and the first direction is the same as the vertical direction. cross.

Optionally, the unidirectional scattering screen further includes a Fresnel cylinder, the Fresnel cylinder is located between the lamp board and the first cylinder grating, and the Fresnel cylinder is negative The focal length cylindrical lens, and the axial direction of the Fresnel cylindrical lens is the vertical direction.

Optionally, the light board includes a plurality of light-emitting components;

The unidirectional scattering screen also includes a light homogenizing structure, and the light homogenizing structure is located between the light plate and the first lenticular grating.

Optionally, the distance between the light pole and the central axis is greater than zero.

Optionally, the light pole includes a first light pole and a second light pole, and the first light pole and the second light pole are symmetrically arranged about the central axis.

Optionally, the unidirectional scattering screen is a curved screen.

Optionally, the first direction is not perpendicular to the vertical direction;

The three-dimensional display device further includes an upper mirror surface and a lower mirror surface; along the vertical direction, the first lenticular lens is located between the upper mirror surface and the lower mirror surface.

In a second aspect, an embodiment of the present application provides a three-dimensional display device, including:

The light pole is fixed on the turntable; the light pole is configured to independently emit light in at least two directions in a horizontal plane to form at least two viewpoints; the light pole includes a light board and a unidirectional scattering screen;

Wherein, the one-way scattering screen is located on the inner side of the light panel and on the light exiting path of the light panel.

Optionally, there are multiple light poles, multiple one-way scattering screens, and the light poles and the one-way scattering screens are arranged in one-to-one correspondence.

In a third aspect, an embodiment of the present application provides a three-dimensional display device, including:

Fixed platform

The light pole is fixed on the fixed platform; the light pole independently emits light in at least two directions in the horizontal plane to form at least two viewpoints; the light pole includes a light board and a unidirectional scattering screen;

In a fourth aspect, an embodiment of the present application provides a three-dimensional display system, which includes at least two three-dimensional display devices as described in the first aspect.

Optionally, it further includes a first reflector, a second reflector, and a third reflector. The first reflector corresponds to the three-dimensional display device one-to-one; the first end of the second reflector faces the same The second mirror is the closest to the first mirror, the second end of the second mirror faces the gap between the two adjacent three-dimensional display devices, and the first mirror is connected to the The second mirror is located on the same side of the three-dimensional display device; the first end of the third mirror faces the first mirror, and the second end of the third mirror faces the second mirror.

Optionally, the connecting line between the centers of two adjacent three-dimensional display devices is a central connecting line, and the first reflecting mirror is parallel to the central connecting line;

The centers of all the three-dimensional display devices are located on the same straight line.

Optionally, the connecting line between the centers of two adjacent three-dimensional display devices is a central connecting line, and the included angle between the first reflector and the central connecting line is greater than 0;

The centers of all the three-dimensional display devices are located on the same curve, and the first mirror and the second mirror are away from the center of curvature at any position of the curve.

The centers of all the three-dimensional display devices are located on the same curve, and the first mirror and the second mirror face one side of the center of curvature at any position of the curve.

Description of the drawings

FIG. 1 is a schematic structural diagram of a super multi-viewpoint three-dimensional display device provided by an embodiment of the application;

Figure 2 is a schematic diagram of the unidirectional scattering screen expanding the light emitted by the light board in the vertical direction;

FIG. 3 is a top view of a partial structure of another super-multi-viewpoint three-dimensional display device provided by an embodiment of the application;

FIG. 4 is a schematic diagram of a Fresnel cylindrical lens provided by an embodiment of the application expanding light in the horizontal direction;

FIG. 5 is a schematic diagram of the uniform light effect of a uniform light structure provided by an embodiment of the present application;

Fig. 6 is a schematic diagram of the structure of the first lenticular grating in the unidirectional scattering screen;

FIG. 7 is a schematic diagram of the positions of the first light board and the second light board in FIG. 1;

FIG. 8 is a partial structural side view of another super-multi-viewpoint three-dimensional display device provided by an embodiment of the application;

Fig. 9 is a front view of the first lenticular grating, upper mirror surface and lower mirror surface in the unidirectional scattering screen;

Fig. 10 is a three-dimensional view of the first lenticular grating, the upper mirror surface and the lower mirror surface in the unidirectional scattering screen;

Figure 11 is a schematic diagram of light reflecting between the upper mirror surface and the lower mirror surface;

FIG. 12 is a schematic structural diagram of a super multi-view 3D display device provided by an embodiment of the application;

FIG. 13 is a schematic diagram of a three-dimensional display system provided by an embodiment of the application;

FIG. 14 is a schematic diagram of a part of the structure of the three-dimensional display system shown in FIG. 13;

15 is a schematic diagram of another three-dimensional display system provided by an embodiment of the application;

FIG. 16 is a schematic diagram of a part of the structure of the three-dimensional display system shown in FIG. 15;

FIG. 17 is a schematic diagram of another three-dimensional display system provided by an embodiment of the application;

18 is a schematic diagram of a part of the structure of the three-dimensional display system shown in FIG. 17;

FIG. 19 is a schematic diagram of a trajectory circle equivalent to an equivalent circle provided by an embodiment of the application.

Detailed ways

The application will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described here are only used to explain the application, but not to limit the application. In addition, it should be noted that, for ease of description, the drawings only show a part of the structure related to the present application instead of all of the structure.

FIG. 1 is a schematic structural diagram of a super multi-viewpoint 3D display device provided by an embodiment of the application. Referring to FIG. 1, the super multi-viewpoint 3D display device includes a turntable 10 and at least one light pole 70. The light pole 70 includes a light board 20 and a unidirectional diffusion screen 30. In some feasible implementation manners, one light panel 20 corresponds to one one-way diffusion screen 30, and the light panels 20 and the one-way diffusion screen 30 are arranged in one-to-one correspondence. The turntable 10 rotates around a central axis L1 of the turntable 10, and the central axis L1 extends in the vertical direction. At least one light pole 70 is fixed on the turntable 10 for luminous display. The light pole 70 independently emits light in at least two directions in the horizontal plane to form at least two viewpoints. That is, the light pole 70 can independently emit light at at least two different angles in the horizontal direction to form at least two viewpoints in the horizontal direction. The unidirectional scattering screen 30 is located at the periphery of the light board 20 away from the central axis L1 and is located on the light exiting path of the light board 20.

Exemplarily, the one-way diffusion screen 30 is used to expand the light emitted by the lamp panel 20 in a direction perpendicular to the extension direction of the first cylindrical mirror. The first cylindrical mirror in the one-way diffusion screen 30 extends in the horizontal direction, and the one-way diffusion screen 30 is used to expand the light emitted by the lamp panel 20 in the vertical direction.

Figure 2 is a schematic diagram of the unidirectional scattering screen expanding the light emitted by the lamp panel in the vertical direction. Referring to Figure 2, the direction of the optical axis is the Z direction, and the extension direction of the central axis L1 is parallel to the Y direction. 30 expands the light emitted by the light board 20 in the Y direction, thereby expanding the visible viewing angle of the human eye Eye in the vertical direction (ie, the Y direction).

Illustratively, the light panel 20 and the unidirectional diffusion screen 30 are arranged in one-to-one correspondence, and the distance between the light panel 20 and the unidirectional diffusion screen 30 is fixed, and the light panel 20 and the unidirectional diffusion screen 30 are relatively fixed.

In the super-multi-viewpoint three-dimensional display device provided by the embodiment of the present application, the light pole is located on the turntable, so that the turntable can be rotated and combined with the persistence effect of human vision by means of mechanical scanning to display pixels (the light-emitting components in the light pole include Multiple display pixels) time multiplexing in exchange for an increase in spatial resolution, thereby increasing the number of viewpoints of three-dimensional display and increasing the spatial resolution. In addition, the light emitted by the lamp panel is projected onto the unidirectional scattering screen, which turns on the light on the projection unidirectional scattering screen in the vertical direction, while the horizontal direction maintains the vector nature of the original narrow beam, so that the image is projected There will be a large viewing angle in the vertical direction, and a small viewing angle in the horizontal direction with many viewpoints, which ensures that people can see images with parallax when viewing with both eyes, thereby achieving 3D visual effects. That is to say, the unidirectional scattering screen expands the visible viewing angle in the vertical direction, and the image can be observed in any visible viewing angle in the vertical direction, and the image cannot be observed only at a specific viewpoint in the vertical direction. Therefore, the application performance and ease of use of the super-multi-viewpoint three-dimensional display device are improved. The super-multi-viewpoint three-dimensional display device provided by the embodiments of the present application can achieve a large field of view, high resolution, super-multi-viewpoint real-time 3D display, and the vertical field of view can reach 160 degrees or more, and the resolution can reach retinal quality.

FIG. 3 is a top view of a part of the structure of another super multi-viewpoint 3D display device provided by an embodiment of the application. FIG. 6 is a schematic diagram of the structure of the first lenticular grating in the unidirectional scattering screen. Referring to FIGS. 3 and 6, the unidirectional scattering The screen 30 includes a first lenticular lens 31, and the first lenticular lens 31 includes a plurality of first cylindrical lenses 311 extending in a first direction, the first direction intersecting the vertical direction. In the embodiment of the present application, the unidirectional scattering screen 30 includes a first lenticular grating 31, the extending direction of the first lenticular lens 311 in the first lenticular grating 31 is perpendicular to the vertical direction, or the first lenticular grating 31 is The extension direction of a cylindrical mirror 311 is substantially perpendicular to the vertical direction, so that the one-way scattering screen 30 can expand the light emitted by the lamp panel 20 in the extension direction perpendicular to the first cylindrical mirror 311. In other embodiments, the unidirectional scattering screen 30 may further include a slit grating or the like, for example. When the extending direction of the first cylindrical lens 311 in the first lenticular grating 31 is approximately perpendicular to the vertical direction, the extending direction of the first cylindrical lens 311 has some deflection relative to the horizontal direction. The deflection angle is determined by the maximum viewing distance and the height of the screen. (That is, the height of the light board 20), the distance between the eyes of a person is jointly determined. Exemplarily, the included angle between the first direction and the vertical direction is greater than or equal to 85° and less than or equal to 90°.

Fig. 4 is a schematic diagram of a Fresnel cylindrical lens expanding light in the horizontal direction according to an embodiment of the application. Referring to Figs. 3 and 6, the unidirectional scattering screen 30 also includes a Fresnel cylindrical lens 32. The mirror 32 is located between the light board 20 and the first lenticular grating 31. The Fresnel cylinder 32 is a negative focal length cylinder, and the axial direction of the Fresnel cylinder 32 is a vertical direction. The Fresnel lens 32 can expand the light emitted by the lamp panel 20 in the horizontal direction (ie, the X direction) to increase the visible viewing angle in the horizontal direction. It should be noted that the human eyes (ie, human left and right eyes) are arranged in the horizontal direction, and the expansion of the Fresnel cylinder 32 to the light in the horizontal direction is the expansion of the entire image displayed on the unidirectional scattering screen 30.

Exemplarily, for the left and right eyes, the viewing angle formed by two adjacent display pixels or two display pixels separated by N display pixels in the horizontal direction is very small, and they are respectively visible to the left and right eyes, thereby forming a large number of pixels in the horizontal direction. This point of view ensures that people can see images with parallax when viewing with both eyes, thereby achieving a three-dimensional visual effect. Among them, N is a positive integer. The Fresnel cylinder 32 may be a Fresnel concave mirror or a Fresnel convex mirror.

Fig. 5 is a schematic diagram of the homogenization effect of a homogenization structure provided by an embodiment of the application. Referring to Fig. 1, Fig. 3 and Fig. 5, the light board 20 includes a plurality of light-emitting parts 21 (the light-emitting part 21 includes a plurality of display pixels). The diffuser screen 30 further includes a light homogenization structure 33, and the light homogenization structure 33 is located between the light plate 20 and the first lenticular grating 31. When the lamp panel 20 includes a plurality of light-emitting components 21, there is a problem of splicing the projected images of the adjacent light-emitting components 21. In the embodiment of the present application, the unidirectional scattering screen 30 also includes a uniform light structure 33. The uniform light structure 33 makes the brightness of the spliced part uniform. The imaging quality of the super-multi-viewpoint three-dimensional display device is improved. It should be noted that the number of light-emitting components 21 is exemplarily shown in FIG. 1.

Exemplarily, when a single light pole contains two or more light-emitting components 21 (such as vector pixels), the light-emitting component 21 scans and displays the image in the vertical direction (Y direction) and needs to be spliced. If there is no uniform light structure 33, the display image brightness It will be uneven, so the unidirectional scattering screen 30 also includes a uniform light structure 33, as shown in FIG. 5, the image brightness is independent of the direction of the incident light in the vertical direction.

Exemplarily, the uniform light structure 33 may be located between the Fresnel lenticular lens 32 and the first lenticular grating 31. In other embodiments, the light homogenization structure 33 can also be arranged between the Fresnel lenticular lens 32 and the light board 20, or the light homogenization structure 33 can be arranged on the side of the first lenticular grating 31 away from the light board 20. .

Exemplarily, the first lenticular grating 31, the Fresnel cylindrical lens 32 and the homogenizing structure 33 are tightly combined, and the first lenticular grating 31, the Fresnel cylindrical lens 32 and the homogenizing structure 33 are There can be no gap between any two.

Exemplarily, the light emitting component 21 may be a vector pixel or a high frame rate micro projector. Vector pixels refer to the use of optical imaging devices and light sources with bright, small, and fast response characteristics such as MicroLed, lasers, etc., combined with chip driver programs to realize that the intensity of the display pixels to different angles of light can be controlled separately, so that each display Pixels can be individually lit, individually addressed, and individually controlled light-emitting elements. That is, each display pixel in the vector pixel has vector directivity, so as to achieve high-precision, wide viewing area, and independent multi-directional projection.

Optionally, referring to FIG. 1, the light board 20 further includes a driving circuit 22, and the driving circuit 22 is electrically connected to the light-emitting component 21 for providing a driving voltage or a driving current for the light-emitting component 21.

Optionally, referring to FIG. 1, the distance between the light pole 70 and the central axis L1 is greater than zero. In other words, the light pole 70 is not at the center of rotation of the turntable 10. The area of the light pole 70 is smaller than that of the turntable 10. When the turntable 10 rotates at a high speed, the rotation speed of the light pole 70 exceeds the capturing frequency of the human eye, and the human eye cannot see the light pole 70, which is completely transparent. The display content of 70 can have a completely floating effect.

Optionally, referring to FIG. 1, at least one light pole 70 includes a first light pole 71 and a second light pole 72, and the first light pole 71 and the second light pole 72 are symmetrically arranged about the central axis L1. In the embodiment of the present application, the super-multi-view 3D display device includes two light poles 70. On the one hand, compared with the solution that includes only one light pole 70, the rotation speed of the turntable 10 is reduced by half under the same scanning frequency, which improves The system stability of the super multi-view 3D display device is improved; on the other hand, compared with the solution including at least three light poles 70, the provision of two light poles 70 reduces the cost of the super multi-view 3D display device.

Exemplarily, referring to FIG. 1, the first light board 71 includes a first light board 201, and the second light pole 72 includes a second light board 202.

FIG. 7 is a schematic diagram of the positions of the first light board and the second light board in FIG. 1. Referring to FIG. 1 and FIG. 7, the light board 20 includes a plurality of light-emitting components 21. Along the vertical direction (Y direction), the light-emitting components 21 on the first light board 201 and the light-emitting components 21 on the second light board 202 are arranged in a staggered manner. In the embodiment of the present application, the light-emitting components 21 on the first light board 201 and the light-emitting components 21 on the second light board 202 are arranged in a staggered arrangement. When the turntable 10 rotates around the central axis L1 to scan and display, an interlaced scan is formed in the direction of movement. The requirement for the speed of the turntable 10 can be reduced, and the resolution can also be improved. Exemplarily, along the vertical direction (Y direction), the light-emitting component 21 on the first light board 201 and the light-emitting component 21 on the second light board 202 may be offset by one-half of the light-emitting component 21.

Optionally, referring to FIG. 1, the unidirectional scattering screen 30 is a curved screen. Illustratively, the curved surface where the unidirectional scattering screen 30 is located is a cylindrical surface. In the implementation of this application, the unidirectional scattering screen 30 is a curved screen, and the curved screen has the function of expanding the viewing angle.

Optionally, referring to FIG. 1, the super multi-viewpoint three-dimensional display device may further include a motor 40 and a housing 50. The motor 40 is mechanically connected to the turntable 10 for driving the turntable 10 to rotate. The housing 50 is located on the periphery of the light pole 70 (including the light board 20 and the one-way scattering screen 30), and is used to mechanically isolate the light pole 70 from the outside world and protect the light pole 70 from external damage.

The super-multi-viewpoint 3D display device provided by the embodiment of the present application may also include an eye tracking device. The eye-tracking device tracks the position of the human eye. The super-multi-viewpoint 3D display device only displays data from two viewing angles for each viewer, instead of Display data under all viewing angles, thereby reducing the amount of projection display information transmission and reducing the power consumption of the super-multi-viewpoint three-dimensional display device. The super-multi-viewpoint three-dimensional display device provided by the embodiment of the present application may further include a gesture recognition module or a touch screen.

FIG. 8 is a partial structural side view of another super-multi-viewpoint three-dimensional display device provided by an embodiment of the application. FIG. 9 is a front view of the first lenticular grating, upper mirror surface and lower mirror surface in the unidirectional scattering screen, and FIG. 10 is The three-dimensional view of the first lenticular grating, the upper mirror surface and the lower mirror surface in the unidirectional scattering screen, referring to Fig. 8, Fig. 9 and Fig. 10, the first direction crosses the vertical direction (Y direction). The extending direction of the first cylindrical mirror 311 is not perpendicular to the vertical direction, and the extending direction of the first cylindrical mirror 311 has a certain inclination with respect to the horizontal direction (X direction). The super multi-viewpoint 3D display device further includes an upper mirror surface 41 and a lower mirror surface 42. Along the vertical direction, the first lenticular lens 31 is located between the upper mirror surface 41 and the lower mirror surface 42. The light beam surface (the triangular area in FIG. 10) of the light emitted by the lamp panel 20 after being expanded by the unidirectional scattering screen 30 has a certain angle with the upper mirror surface 41 and the lower mirror surface 42. The light emitted by the lamp panel 20 is expanded by the unidirectional scattering screen 30 to form a scan line L23, the light beam reflected by the upper mirror 41 of L23 forms a second scan line L22, and the light beam reflected by the lower mirror 42 forms the third line. The scan lines L21, L21 are parallel to L22, and the three scan lines (that is, L21, L22, and L23) are not in a straight line, thereby increasing the resolution in the vertical direction. In addition, with the eye tracking device, after determining the position of the human eye, the display pixel in the appropriate light-emitting component can be lighted to achieve the effect of expanding the field of view.

Fig. 11 is a schematic diagram of light reflecting between the upper and lower mirrors. Referring to Figs. 8-11, W1 is the light spot width of the light emitted by the light-emitting component 21 after passing through the unidirectional scattering screen 30 and reaching the Eye of the human eye, and θ indicates The angle between the center line of the light spot and the horizontal direction after the light emitted by the light-emitting component 21 passes through the unidirectional scattering screen 30, 90°-θ is the inclination of the extension direction (and the horizontal direction) of the first lenticular grating 31, and h1 is the person The vertical distance between the Eye Eye and the upper mirror surface 41, and h2 is the vertical distance between the Eye Eye and the lower mirror surface 42 of the human eye. When the distance between the viewer (the human eye) and the super multi-view 3D display device is K, the distance between the viewer and the super multi-view 3D display device refers to the geometric center of the viewer and the super multi-view 3D display device The distance between. The divergence angle of the display pixel in the light-emitting component 21 is

then

It should be noted that in FIG. 11, the upper and lower mirror 41 reflects light to the left eye of the human eye as an example, and the viewing situation of the right eye is the same as the left eye.

In order for the human eyes (including left and right eyes) to see the light emitted by the light emitting component 21 after passing through the unidirectional scattering screen 30, the light directly emitted and the light reflected by the upper mirror 41 and the lower mirror 42 do not affect each other (in terms of interpupillary distance). L calculation, the interpupillary distance is the distance between the pupils of the left eye and the right eye), the inclination angle θ shown in Fig. 11 needs to be satisfied, so that the reflection spot of the lower mirror 42 covers the left eye and the upper mirror reflection spot is the same as the direct exit The light spot does not cover the right eye. Assuming that the light spot reflected by the lower mirror 42 and the light spot directly emitted are two light spots separated by n (n=1, 2, 3...) display pixels, the distance between the two light spots is n*W1, which does not directly affect the right eye The condition of is n*W1～=L (where the symbol "～＝" means not equal to), the condition that the reflected light spot of the upper mirror 41 does not cover human eyes is n*w1+W0～=L; then W0 satisfies:

Wherein W0 is the distance from the center of the light spot to the right eye when the light spot reflected by the lower mirror 42 covers the left eye after the light emitted by the display pixel passes through the unidirectional scattering screen 30.

The super-multi-viewpoint 3D display device shown in FIG. 1 is suitable for image display outside the super-multi-viewpoint 3D display device, for example, it can be used as a desktop sprite display device. In other embodiments, the image display can also be performed inside the super-multi-viewpoint three-dimensional display device.

FIG. 12 is a schematic structural diagram of a super-multi-viewpoint 3D display device provided by an embodiment of the application. Referring to FIG. 12, the super-multi-viewpoint 3D display device includes a turntable and at least one light pole 70. The light pole 70 includes a light board 20 and a unidirectional diffusion screen 30. The turntable rotates around the central axis of the turntable, and the central axis extends in the vertical direction. At least one light pole 70 is fixed on the turntable for luminous display. The light pole 70 independently emits light in at least two directions in the horizontal plane to form at least two viewpoints. That is, the light pole 70 can independently emit light at at least two different angles in the horizontal direction to form at least two viewpoints in the horizontal direction. The one-way scattering screen 30 and the light board 20 are arranged in one-to-one correspondence, located on the inner side of the light board 20, and on the light exiting light path of the light board 20, and used to align the light board 20 in the direction perpendicular to the extension direction of the first cylindrical mirror 311. The emitted light expands.

Exemplarily, referring to FIG. 12, the super-multi-viewpoint three-dimensional display device may further include a viewing platform 60 on which the viewer can observe the image displayed by the light pole 70. Since the unidirectional scattering screen 30 expands the light emitted by the light pole 20 in the extending direction perpendicular to the first cylindrical mirror 311, thereby expanding the visible viewing angle of the human eye in the vertical direction. In the embodiment of the present application, the requirement for the viewing angle of the unidirectional scattering screen 30 is reduced, and the viewing angle does not need to be enlarged in the horizontal direction.

In some feasible implementations, the light pole 70 may not be arranged on the turntable, so that the turntable drives the light pole 70 to move, and the observer is stationary. Instead, it uses the principle of relative motion and applies it to the scene where the observer moves relative to the three-dimensional display device. For example, it is installed along the subway. People in the subway can see through the window the light poles 70 along the subway. Perspective stereo image. At this time, there is relative movement between the observer and the light pole in the three-dimensional display device. Therefore, high-resolution super-multi-viewpoint display can also be realized. Wherein, the light pole 70 may include a light board 20 and a one-way diffusion screen 30 arranged in a one-to-one correspondence, and the distance between the light board 20 and the one-way diffusion screen 30 is fixed, that is, the light board 20 and the one-way diffusion screen 30 are relatively fixed. In this scene, the super-multi-viewpoint 3D display device may include: a fixed platform and at least one light pole 70. At least one light pole 70 is fixed on the fixed platform for luminous display. The light pole 70 independently emits light in at least two directions in the horizontal plane to form at least two viewpoints. The light pole 70 includes a light board 20 and a unidirectional diffusion screen 30. The unidirectional scattering screen 30 is fixed on the fixed platform, located inside the light board 20 and on the light exiting path of the light board 20.

FIG. 13 is a schematic diagram of a three-dimensional display system provided by an embodiment of the application. Referring to FIG. 13, the three-dimensional display system includes at least two super-multi-viewpoint three-dimensional display devices. The super-multi-viewpoint three-dimensional display device is suitable for image display outside the super-multi-viewpoint three-dimensional display device.

Optionally, referring to FIG. 13, the three-dimensional display system further includes a first reflector 210, a second reflector 220, and a third reflector 230. The first reflector 210 has a one-to-one correspondence with the super multi-viewpoint three-dimensional display device 100, and the second The first end of the reflector 220 faces the first reflector 210 closest to the second reflector 220, and the second end of the second reflector 220 faces the gap between two adjacent super-multi-view 3D display devices 100 , The first mirror 210 and the second mirror 220 are located on the same side of the super multi-view 3D display device 100. The first end of the third reflecting mirror 230 faces the first reflecting mirror 210, and the second end of the third reflecting mirror 230 faces the second reflecting mirror 220. In the embodiment of the present application, the images displayed by the multiple super-multi-viewpoint 3D display devices 100 can be spliced by the first mirror 210, the second mirror 220, and the third mirror 230, so as to achieve the effect of spliced display and large-screen display. .

Exemplarily, the first end of the third reflector 230 is connected to the first reflector 210, and the second end of the third reflector 230 is connected to the second reflector 220.

Exemplarily, the third reflection mirror 230 and the second reflection mirror 220 are symmetrical with respect to the first reflection mirror 210, that is, the third reflection mirror 230 and the second reflection mirror 220 are symmetrically disposed on opposite sides of the first reflection mirror 210.

FIG. 14 is a partial structural diagram of the three-dimensional display system shown in FIG. 13, referring to FIG. 13 and FIG. 14, the center of two adjacent super-multi-viewpoint three-dimensional display devices 100 (shown as "+" in FIG. 13 and FIG. 14) The connecting line is the central connecting line L3, and the first reflecting mirror 210 is parallel to the central connecting line L3. The centers of all the super multi-viewpoint 3D display devices 100 are located on the same straight line.

Exemplarily, referring to FIGS. 13 and 14, the image formed by the first super multi-view 3D display device 110 in the first mirror 210 and the second mirror 220 is the first super multi-view 3D display device image 110'. The common tangent between the super multi-view 3D display device 110 and the first super multi-view 3D display device image 110 ′ is perpendicular to the first mirror 210. There is a common tangent line that is tangent to the first super multi-view 3D display device 110 and the first super multi-view 3D display device image 110'. The image formed by the second super multi-view 3D display device 120 in the first mirror 210 and the second mirror 220 is the second super multi-view 3D display device image 120', the second super multi-view 3D display device 120 and the second super multi-view 3D display device 120' A common tangent of the super-multi-viewpoint three-dimensional display device image 120 ′ passes through the connection point of the first mirror 210 and the second mirror 220.

Exemplarily, referring to FIGS. 13 and 14, the included angle between the first mirror 210 and the second mirror 220 is 20.82°.

15 is a schematic diagram of another three-dimensional display system provided by an embodiment of the application, and FIG. 16 is a partial structural schematic diagram of the three-dimensional display system shown in FIG. 15. Referring to FIG. 15 and FIG. 16, two adjacent super-multi-viewpoint three-dimensional display devices The connecting line at the center of 100 is the center connecting line L3, and the included angle between the first mirror 210 and the center connecting line L3 is greater than zero. That is, the first mirror 210 is not parallel to the central connecting line L3. The centers of all super-multi-viewpoint 3D display devices 100 are located on the same curve (shown by the dashed line in FIG. 15), and the first mirror 210 and the second mirror 220 are away from the center of curvature at any position of the curve.

Exemplarily, referring to FIGS. 15 and 16, the centers of all super-multi-viewpoint 3D display devices 100 are located on the same circle, the first mirror 210 and the second mirror 220 are located outside the circle, and the audience can be inside the circle Observe the image displayed by the 3D display system. The included angle between the first mirror 210 and the second mirror 220 may be 21.23 degrees.

FIG. 17 is a schematic diagram of another three-dimensional display system provided by an embodiment of the application. FIG. 18 is a schematic diagram of a partial structure of the three-dimensional display system shown in FIG. 17. Referring to FIG. 17 and FIG. 18, two adjacent super-multi-viewpoint three-dimensional display devices The connecting line at the center of 100 is the center connecting line L3, and the included angle between the first mirror 210 and the center connecting line L3 is greater than zero. That is, the first mirror 210 is not parallel to the central connecting line L3. The centers of all super-multi-viewpoint 3D display devices 100 are located on the same curve (shown by the dashed line in FIG. 17), and the first mirror 210 and the second mirror 220 are located on the side facing the center of curvature at any position of the curve.

Exemplarily, the centers of all super-multi-viewpoint 3D display devices 100 are located on the same circle, the first mirror 210 and the second mirror 220 are located in the circle, and the audience can observe the display of the 3D display system on the outside of the circle. image. The included angle between the first mirror 210 and the second mirror 220 may be 18.98 degrees.

FIG. 19 is a schematic diagram of a trajectory circle equivalent to an equivalent circle provided by an embodiment of the application. In the three-dimensional display system shown in FIG. 13-18, the splicing of multiple three-dimensional display devices is based on the emission angle of the light-emitting unit being 180 degrees. Based on the fact that the emission angle β of the light-emitting unit actually does not reach 180 degrees, so the equivalent circle in Figure 13-18 (marked as the first circle 81 in Figure 19) is the equivalent emission angle of the light-emitting unit 180 The degree circle is smaller than the actual trajectory circle of the light-emitting unit (marked as the second circle 82 in FIG. 19). Occlusion may occur during the actual rotation scan stitching. Because the vector pixel size is relatively small, it is basically transparent during scanning display, so the occlusion can be effectively avoided. In addition, the light pole can be transparentized or the imaging method of the optical device can be used to avoid it. Occlude.

Exemplarily, referring to FIG. 19, the first circle 81 may be determined by the two reverse extension lines of the second circle 82 at the actual exit angle β, and the two reverse extension lines of the exit angle β are the outer tangent lines of the first circle 81 .

Claims

A three-dimensional display device includes:

A turntable, the turntable is configured to rotate around a central axis of the turntable, the central axis extending in a vertical direction;

A light pole fixed on the turntable; the light pole is configured to independently emit light in at least two directions in a horizontal plane to form at least two viewpoints; the light pole includes a light board and a unidirectional scattering screen;

Wherein, the one-way scattering screen is located on the periphery of the light board on a side away from the central axis, and is located on the light exiting path of the light board.
The three-dimensional display device according to claim 1, wherein the one-way scattering screen comprises a first lenticular grating, and the first lenticular grating comprises a plurality of first cylindrical mirrors extending in a first direction, and The first direction crosses the vertical direction.
3. The three-dimensional display device according to claim 2, wherein the one-way scattering screen further comprises a Fresnel cylindrical lens, and the Fresnel cylindrical lens is located between the lamp panel and the first lenticular grating, The Fresnel cylinder is a negative focal length cylinder, and the axis of the Fresnel cylinder is a vertical direction.
The three-dimensional display device according to claim 2, wherein the light board comprises a plurality of light-emitting parts;

The unidirectional scattering screen also includes a light homogenizing structure, and the light homogenizing structure is located between the light plate and the first lenticular grating.
The three-dimensional display device according to claim 1, wherein the distance between the light pole and the central axis is greater than zero.
The three-dimensional display device according to claim 1, wherein the light pole comprises a first light pole and a second light pole, and the first light pole and the second light pole are symmetrically arranged about the central axis.
The three-dimensional display device according to claim 1, wherein the unidirectional scattering screen is a curved screen.
The three-dimensional display device according to claim 2, wherein the first direction is not perpendicular to the vertical direction;

The three-dimensional display device further includes an upper mirror surface and a lower mirror surface; along the vertical direction, the first lenticular lens is located between the upper mirror surface and the lower mirror surface.
A three-dimensional display device includes:

A turntable, the turntable is configured to rotate around a central axis of the turntable, the central axis extending in a vertical direction;

The light pole is fixed on the turntable; the light pole is configured to independently emit light in at least two directions in a horizontal plane to form at least two viewpoints; the light pole includes a light board and a unidirectional scattering screen;

Wherein, the one-way scattering screen is located on the inner side of the light panel and on the light exiting path of the light panel.
The three-dimensional display device according to claim 1 or 9, wherein the light pole is provided with multiple, the unidirectional diffusion screen is provided with multiple, and the light pole and the unidirectional diffusion screen are arranged in one-to-one correspondence .
A three-dimensional display device includes:

Fixed platform

The light pole is fixed on the fixed platform; the light pole independently emits light in at least two directions in the horizontal plane to form at least two viewpoints; the light pole includes a light board and a unidirectional scattering screen;

Wherein, the one-way scattering screen is located on the inner side of the light panel and on the light exiting path of the light panel.
A three-dimensional display system, comprising at least two three-dimensional display devices according to any one of claims 1-8.
The three-dimensional display system according to claim 12, further comprising a first reflector, a second reflector, and a third reflector, the first reflector corresponds to the three-dimensional display device one-to-one; the second reflector The first end of the second reflector faces the first reflector closest to the second reflector, and the second end of the second reflector faces the gap between two adjacent three-dimensional display devices. The first mirror and the second mirror are located on the same side of the three-dimensional display device; the first end of the third mirror faces the first mirror, and the second end of the third mirror faces The second mirror.
The three-dimensional display system according to claim 13, wherein the connecting line between the centers of two adjacent three-dimensional display devices is a central connecting line, and the first reflecting mirror is parallel to the central connecting line;

The centers of all the three-dimensional display devices are located on the same straight line.
The three-dimensional display system according to claim 13, wherein the connecting line between the centers of two adjacent three-dimensional display devices is a central connecting line, and the included angle between the first reflector and the central connecting line is greater than 0;

The centers of all the three-dimensional display devices are located on the same curve, and the first mirror and the second mirror are away from the center of curvature at any position of the curve.
The three-dimensional display system according to claim 13, wherein the connecting line between the centers of two adjacent three-dimensional display devices is a central connecting line, and the included angle between the first reflector and the central connecting line is greater than 0;

The centers of all the three-dimensional display devices are located on the same curve, and the first mirror and the second mirror face one side of the center of curvature at any position of the curve.