CN115951497A - 2D/3D/light field full-compatible virtual imaging display system - Google Patents

Abstract

The invention provides a 2D/3D/optical field full-compatible virtual imaging display system, which relates to the technical field of display imaging and comprises an eye tracking module, an effective viewing space region box, an optical module, an image control module and an image generation module, wherein a display picture is remotely projected to eyes through a reflective free-form surface field lens and a reflective free-form surface distortion compensation lens, so that an observer can view the display picture without approaching a virtual display, the image control module converts image data into an optical field 3D image, a parallax 3D image or a plane image according to a viewing mode selected by a user, and synchronously transmits an eye position signal to the image generation module to form an optical field, a 3D plane display source, so that the observer can freely switch between a full parallax optical field mode, a naked eye parallax 3D mode and a common plane display mode to adapt to the viewing requirements of different scenes.

Description

A 2D/3D/light field fully compatible virtual imaging display system

technical field

The present invention relates to the technical field of display imaging, and more specifically, to a 2D/3D/light field fully compatible virtual imaging display system.

Background technique

The display industry is one of the cornerstones of my country's electronic information industry. In the past few decades, display technology has developed from the initial signal indicator light to the seven-segment digital display tube, from the cathode ray tube (Cathode Ray Tube, CRT) display to Today's large-size light-emitting diode (Light-Emitting Diode, LED). At the same time, ultra-thin, curved surface, flexible, etc. have gradually become the development direction of display technology. However, these displays are all physical displays, which require a display carrier, such as LCD panels, OLED panels, and the like. The disadvantage of this kind of physical display is that if you want to obtain a huge picture experience, you need a huge display carrier. If you want to watch a 100-inch picture, you need a 100-inch display, which is expensive. Although a projector can provide a huge display screen at a low price through projection, it still needs carriers such as a projection screen to reduce its convenience. For this reason, a carrierless virtual display has emerged as the times require, which can provide huge display images with minimal cost and equipment.

A virtual display is a display through which images are viewed through an optical system, and augmented reality displays (AR), virtual reality displays (VR), and helmet displays are all types of virtual displays. Viewing images with a virtual display is different from the way we usually view displays such as LCDs. Conventional display people can see the image in the usual way of viewing; and when people watch the virtual display, they must adopt the observation method of looking inward at close range, which limits the development of virtual display. The prior art discloses a device that uses the same screen (lens) to display independent and different images to eyes at different positions, including multiple projectors, converging lenses (convex lenses or Fresnel lenses), and mirrors. The projectors include a plurality of projectors positioned out of focus of the lens. The parameters of the lens and the projectors can be adjusted according to different viewing positions and interpupillary distances, so that the light rays emitted by each projector array will be near each eye of the viewer after being respectively converged, so as to achieve the objective of each projector array. The independent viewing of the image projected by a projector can realize high-definition projection display screen, high brightness, ultra-low power, and switchable two-dimensional/three-dimensional display mode. Although the application disclosed in the prior art can realize two-dimensional/three-dimensional display mode switching, but on the one hand, the use of projectors requires carriers such as projection screens, which reduces its convenience. It is difficult to grasp the degree of overlap of parallax patterns between each projector. In addition, the human eye needs to be in a fixed specific position to watch. If you want to generate multiple viewpoints, you need a lot of projectors, which has great limitations. The thickness of the lens is very large, the focal length is generally very long, and the thickness is about meters. In addition, the imaging quality of the single lens is better in the middle, and the imaging quality at the edge will be very high. Poor, that is, the viewing area will be small.

Contents of the invention

In order to solve the problem that the traditional virtual display requires close viewing and cannot adapt to the viewing needs of different scenes, the present invention proposes a 2D/3D/light field fully compatible virtual imaging display system, which projects the display screen to the human body at a long distance. Eyes, the observer can watch without being close to the virtual display, and at the same time, the observer can freely switch between the three modes of full parallax light field mode, naked eye parallax 3D mode and ordinary flat display to meet the viewing needs of different scenes.

In order to achieve the above-mentioned technical effect, the technical scheme of the present invention is as follows:

A 2D/3D/light field fully compatible virtual imaging display system, the system includes: a human eye tracking module, an effective viewing space area box, an optical optical system composed of a reflective free-form surface field of view mirror and a reflective free-form surface distortion compensation mirror. Module, image control module and image generation module; the reflective free-form surface field of view mirror is the carrier directly viewed by the human eye, and the reflective free-form surface distortion compensation mirror compensates the aberration displayed by the reflective free-form surface view field mirror. The module is located above the reflective free-form surface field of view mirror, tracks the position of the pupil of the human eye located in the effective viewing space area box, and transmits the signal of the pupil position of the human eye to the image control module, and the image control module converts the image data according to the viewing mode selected by the user It is a light field 3D image, a parallax 3D image or a plane image, and synchronously sends the human eye position signal to the image generation module to form an image beam. The image beam sequentially exits through a reflective free-form surface distortion compensation mirror and a reflective free-form surface field of view mirror Then, it is delivered to the human eye.

This technical solution uses the reflective free-form surface field of view mirror and the reflective free-form surface distortion compensation mirror to project the display screen to the human eye at a long distance, so that the observer can watch it without being close to the virtual display. The image data is converted into light field 3D image, parallax 3D image or planar image, and the human eye position signal is sent to the image generation module synchronously to form a light field, 3D and planar display source, enabling the observer to watch in full parallax light field mode Freely switch between three modes: 3D mode with naked-eye parallax and ordinary flat display to meet the viewing needs of different scenes.

Preferably, the reflective free-form surface field of view mirror is a front coated concave mirror, the reflective free-form surface distortion compensation mirror is a front coated mirror, and the reflective free-form surface field of view mirror is used to provide the viewing field for human eyes, and the free-form surface is distorted The compensation mirror is used for compensating the distortion of the reflective free-form surface field mirror and the left-right reversal of the picture, and folding the optical path at the same time.

Here, through the joint action of the reflective free-form surface distortion compensation mirror and the reflective free-form surface field of view mirror, the output image of the image generation module is proportionally enlarged to form a huge display image, and the human eye Effectively watch the space area and observe, and you can observe 2D/3D/light field fully compatible virtual display images.

Preferably, the size of the reflective free-form surface field of view lens satisfies: the width is greater than 2*d*tan15°, and the height is greater than 2*d*tan15°, wherein, d is the center of the effective viewing space area box to the reflective free-form surface The distance of the field of view mirror; the reflective free-form surface distortion compensation mirror is a convex mirror or a concave mirror according to the design magnification.

Preferably, the image generation module includes a planar light field display source, a beam splitter, and a directional backlight parallax type naked-eye 3D display source. The planar light field display source provides a stereoscopic display with full parallax and no amplitude conflict. The naked-eye 3D display source provides flat 2D or full-resolution left and right parallax stereoscopic images, and the planar light field display source and the pointing backlight parallax-type naked-eye 3D display source are placed orthogonally, forming an angle of 45° with the beam splitting surface of the beam splitter .

Here, the planar light field display source and the 2D/3D switchable directional backlight parallax naked-eye 3D display source are coupled through a beam splitter, so that the image generation surface is consistent with the optical path of the human eye, and the two image display sources are orthogonal to each other. .

Preferably, the distance between the source surface of the planar light field display and the source surface pointing to the backlight parallax type naked eye 3D display is consistent with the center of the beam splitting surface of the beam splitter.

Preferably, the vicinity of the image square focal point of the optical module composed of a reflective free-form surface field of view mirror and a reflective free-form surface distortion compensation mirror is the position of the effective viewing space area box, allowing the human eye to move within the effective viewing space area box, The object focus of the optical module is the surface of the plane light field display source light field display source and the pointing backlight parallax type naked eye 3D display source surface.

Preferably, the planar light field display source includes a first polygonal backlight module, a first linear Fresnel lens array, a first linear diffusion film, a first liquid crystal display panel, a first phase retardation film, and an imaging lens array arranged in sequence and a directional diffusion film, the first polygonal backlight module is provided with LED lamp beads, when the system is in the light field display mode, the planar light field display source is used for display, and the directional backlight parallax type naked-eye 3D display source is turned off , the image control module sends the light field display image to the liquid crystal display panel, and controls the corresponding LED lamp beads on the first polygonal backlight module to light up according to the human eye position information captured by the human eye tracking module, through the linear Fresnel lens The array forms a collimated light source, diffuses through a linear diffusion film, and sends the light field image on the liquid crystal display panel to the air through a phase retardation film and an imaging lens array to form a light field display. The directional diffusion film is used to increase the spatial sampling rate, and the light field display The light beam passes through the beam splitter, the reflective free-form surface distortion compensating mirror and the reflective free-form surface field of view mirror to project the undistorted and enlarged light field image to the human eye located in the effective viewing space area box.

Preferably, the directional backlight parallax type naked-eye 3D display source includes a second polygonal backlight module, a second linear Fresnel lens array, a second linear diffusion film, a second liquid crystal display panel, and a second phase retardation film arranged in sequence, The second polygonal backlight module is provided with LED lamp beads. When the system is in the parallax type naked eye 3D display mode, the directional backlight parallax type naked eye 3D display source is displayed, and the planar light field display source (51) is turned off. The image control module sends the time-sequentially switched parallax images to the second liquid crystal display panel and captures the position information of the human eyes according to the human eye tracking module, controls the second polygonal backlight module to light up the LED lamp beads corresponding to the left and right eyes, and passes the first The two-linear Fresnel lens array forms two pointing beams that are time-sequentially switched from left to right, and passes the parallax image refreshed by the second liquid crystal display panel through the beam splitter, reflective free-form surface distortion compensation mirror and reflective free-form surface field of view mirror. The undistorted magnified light field image is accurately delivered to the left and right eyes of the person.

Preferably, when the system is in the flat 2D display mode, the pointing backlight parallax type naked-eye 3D display source is used for display, the flat light field display source is turned off, and the image control module sends the ordinary flat image to the second liquid crystal display panel And turn on all the backlight beads on the second polygonal backlight module, through the second linear Fresnel lens array and the second linear diffusion film, pass the ordinary 2D image displayed on the second liquid crystal display panel through the beam splitter, reflective The free-form surface distortion compensating mirror and the reflective free-form surface field-of-view mirror project the undistorted magnified light field image to the human eye.

Preferably, the width of the first liquid crystal display panel or the second liquid crystal display panel is w, the height is h, the focal length of the optical module is f, and the distance between the first liquid crystal display panel or the second liquid crystal display panel and the optical module is is x, then the width of the enlarged virtual image is W=w*f/x, and the height is H=h*f/x, where x is generally between 0-30.

Compared with the prior art, the beneficial effects of the technical solution of the present invention are:

The present invention proposes a 2D/3D/light field fully compatible virtual imaging display system, including a human eye tracking module, a human eye tracking module, an effective viewing space area box, an optical module, an image control module, and an image generation module. The free-form surface field of view mirror and the reflective free-form surface distortion compensation mirror project the display screen to the human eye from a long distance, so that the observer can watch it without being close to the virtual display. The image control module converts the image data into light according to the viewing mode selected by the user. Field 3D images, parallax 3D images or planar images, and synchronously send the human eye position signal to the image generation module to form light field, 3D and planar display sources, enabling observers to watch in full parallax light field mode and naked eye parallax 3D mode It can switch freely with three modes of ordinary flat display to meet the viewing needs of different scenes.

Description of drawings

FIG. 1 shows a schematic structural diagram of the 2D/3D/light field fully compatible virtual imaging display system proposed in Embodiment 1 of the present invention;

Fig. 2 shows the structural composition diagram of the planar light field display source proposed in Embodiment 2 of the present invention;

Fig. 3 is a diagram showing the structural composition of the directional backlight parallax type naked-eye 3D display source proposed in Embodiment 2 of the present invention.

Among them, 1-human eye tracking module; 2-effective viewing space area box; 31-reflective free-form surface field of view mirror; 32-reflective free-form surface distortion compensation mirror; 4-image control module; 5-image generation module Group; 51-plane light field display source; 511-the first polygonal backlight module; 512-the first linear Fresnel lens array; 513-the first linear diffusion film; 514-the first liquid crystal display panel; 515-the first 1 phase retardation film; 516-imaging lens array; 517-directional diffusion film; 52-beam splitter; 53-pointing backlight parallax type naked-eye 3D display source; 531-second polygonal backlight module; 532-second linear phenanthrene Neel lens array; 533-the second linear diffusion film; 534-the second liquid crystal display panel; 535-the second phase retardation film.

Detailed ways

The accompanying drawings are for illustrative purposes only and cannot be construed as limiting the patent;

In order to better illustrate this embodiment, some parts of the drawings will be omitted, enlarged or reduced, and do not represent the actual size;

For those skilled in the art, it is understandable that some well-known content descriptions in the drawings may be omitted.

The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

The positional relationship described in the drawings is only for illustrative purposes, and cannot be construed as a limitation to this patent;

Example 1

As shown in Figure 1, this embodiment proposes a 2D/3D/light field fully compatible virtual imaging display system, the system includes: a human eye tracking module 1, an effective viewing space area box 2, a reflective free-form surface field of view mirror 31 An optical module 3, an image control module 4, and an image generation module 5 composed of a reflective free-form surface distortion compensation mirror 32; The aberration displayed by the reflective free-form surface field of view mirror 31, the human eye tracking module 1 is located above the reflective free-form surface field of view mirror 31, tracks the position of the human eye pupil located in the effective viewing space area box 2, and the human eye pupil The position signal is transmitted to the image control module 4, and the image control module 4 converts the image data into light field 3D images, parallax 3D images or planar images according to the viewing mode selected by the user, and simultaneously sends the human eye position signal to the image generation module 5 An image beam is formed, and the image beam sequentially passes through the reflective free-form surface distortion compensation mirror 32 and the reflective free-form surface field-of-view mirror 31 to be projected to human eyes.

In this embodiment, the effective viewing space area box 2 does not really exist, but means that the 2D, 3D, and light field fully compatible virtual imaging display system can effectively view the cubic space area. The size of the reflective free-form surface field of view mirror 31 satisfies: the width is greater than 2*d*tan15°, and the height is greater than 2*d*tan15°, wherein, d is the center of the effective viewing space area box 2 to the reflective free-form surface view field mirror 31; the reflective free-form surface distortion compensation mirror 32 is a convex mirror or a concave mirror according to the design magnification. The reflective free-form surface field of view mirror 31 is a front coating concave mirror, and the reflective free-form surface distortion compensation mirror 32 is a front coating mirror. 32 is used to compensate the distortion of the reflective free-form surface field of view mirror 31 and the left-right reversal of the picture. The reflective free-form surface distortion compensation mirror 32 compensates the aberrations of the reflective free-form surface view field mirror 31, such as distortion, field curvature, etc., and at the same time Correct the mirror problem of the outgoing image and fold the light path.

Referring to Fig. 1, the image generation module 5 includes a planar light field display source 51, a beam splitter 52, a pointing backlight parallax type naked-eye 3D display source 53, and the planar light field display source 51 provides a stereoscopic display with full parallax and no amplitude conflict, The directional backlight parallax type naked-eye 3D display source 53 provides plane 2D or full-resolution left and right parallax stereoscopic images, and the planar light field display source 51 and the directional backlight parallax type naked-eye 3D display source 53 are placed orthogonally, and the beam splitter 52 The beam splitting surface is at an angle of 45°. In this embodiment, the surface of the planar light field display source 51 is consistent with the center optical path of the beam splitting surface of the beam splitting mirror 52 from the surface of the plane light field display source 51 pointing to the backlight parallax type naked-eye 3D display source 53.

The vicinity of the focal point of the image side of the optical module 3 composed of the reflective free-form surface field of view mirror 31 and the reflective free-form surface distortion compensation mirror 32 is the position of the effective viewing space area box 2, allowing human eyes to be in the effective viewing space area box 2 Moving, the focus of the object space of the optical module 3 is the surface of the light field display source 51 of the plane light field display source and the surface of the 3D display source 53 pointing to the backlight parallax type naked eye.

Example 2

The structural diagrams of the planar light field display source 51 and the pointing backlight parallax type naked-eye 3D display source 53 are shown in Figure 2 and Figure 3 respectively. Two polygonal backlight module 531, human eye tracking module 1, first liquid crystal display panel 514, second liquid crystal display panel 534 extract the human eye position signal collected by human eye tracking module 2, and simultaneously send the human eye position signal to The first polygonal backlight module 511 or the second polygonal backlight module 531 controls the display output of the first liquid crystal display panel 514 and the second liquid crystal display panel 534 .

In this embodiment, referring to FIG. 2, the planar light field display source 51 includes a first polygonal backlight module 511, a first linear Fresnel lens array 512, a first linear diffusion film 513, a first liquid crystal display The panel 514, the first phase retardation film 515, the imaging lens array 516 and the directional diffusion film 517, the first polygonal backlight module 511 is provided with LED lamp beads, when the system is in the light field display mode, the planar light field display The source 51 is used for displaying, and the directional backlight parallax type naked-eye 3D display source 53 is turned off, and the image control module 4 sends the light field display image to the liquid crystal display panel 514, and controls the second eye position information captured by the eye tracking module 1. The corresponding LED beads on a polygonal backlight module 511 light up, form a collimated light source through the linear Fresnel lens array 512, diffuse through the linear diffusion film 513, and pass the light field image on the liquid crystal display panel 514 through the phase retardation film 515. The imaging lens array 516 is projected into the air to form a light field display, and the directional diffusion film 517 is used to increase the spatial sampling rate. The light field display beam passes through the beam splitter 52, the reflective free-form surface distortion compensation mirror 32 and the reflective free-form surface field of view The mirror 31 sends the undistorted enlarged light field image to the human eyes located in the effective viewing space area box 2, and the human eyes can observe a large-format three-dimensional light field picture without frame conflict.

Referring to FIG. 3 , the directional backlight parallax type naked-eye 3D display source 53 includes a second polygonal backlight module 531 , a second linear Fresnel lens array 532 , a second linear diffusion film 533 , a second liquid crystal display panel 534 and The second phase retardation film 535, the second polygonal backlight module 531 is provided with LED lamp beads, when the system is in the parallax type naked eye 3D display mode, the pointing backlight parallax type The naked-eye 3D display source 53 is displayed, the planar light field display source 51 is turned off, and the image control module 4 sends the time-sequentially switched parallax images to the second liquid crystal display panel 534 and captures the human eye position information according to the human eye tracking module 2 , control the second polygonal backlight module 531 to light up the LED lamp beads corresponding to the left and right eyes, and form two pointing light beams with time sequence switching between the left and right through the second linear Fresnel lens array 532, and refresh the second liquid crystal display panel 534 in time sequence The parallax image passes through the beam splitter 52, the reflective free-form surface distortion compensation mirror 32 and the reflective free-form surface field of view mirror 31, and the undistorted and enlarged light field image is accurately delivered to the left and right eyes of the human being, and the human eyes can observe the Shocking parallax stereoscopic images.

When the system is in the plane 2D display mode, pointing to the backlight parallax type naked-eye 3D display source 53 is used for display, and the plane light field display source 51 is closed, and the image control module 4 sends the common plane image to the second liquid crystal display panel 534 and Turn on all the backlight beads on the second polygonal backlight module 531, pass the ordinary 2D image displayed on the second liquid crystal display panel 534 through the beam splitter through the second linear Fresnel lens array 532 and the second linear diffusion film 533 52. The reflective free-form surface distortion compensating mirror 32 and the reflective free-form surface field-of-view mirror 31 project the undistorted enlarged light field image to the human eye, and the human eye can observe a comfortable huge 2D picture.

Above, the function of the first phase retardation film 515 and the second phase retardation film 535 is to adjust the light beam outgoing phase, the polarization of the outgoing light beam of the planar light field display source 51 and the backlight parallax type naked-eye 3D display source 53 and the incidence of the beam splitter 52 The phase is kept consistent and the chromatic aberration is eliminated.

Example 3

Assume that the width of the first liquid crystal display panel 514 or the second liquid crystal display panel 534 is w, the height is h, the focal length of the optical module is f, and the distance between the first liquid crystal display panel 514 or the second liquid crystal display panel 534 is from the optical module If the distance is x, then the width of the enlarged virtual image is W=w*f/x, and the height is H=h*f/x, where x is generally between 0-30.

Apparently, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the implementation of the present invention. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. All modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the claims of the present invention.

Claims (10)

1. A 2D/3D/light field fully compatible virtual imaging display system, the system comprising: the system comprises an eye tracking module (1), an effective viewing space area box (2), an optical module (3) consisting of a reflective free-form surface field lens (31) and a reflective free-form surface distortion compensation lens (32), an image control module (4) and an image generation module (5); the reflective free-form surface field lens (31) is used for directly watching a carrier by human eyes, the reflective free-form surface distortion compensation lens (32) compensates aberration displayed by the reflective free-form surface field lens (31), the human eye tracking module (1) is positioned above the reflective free-form surface field lens (31), the position of a human eye pupil positioned in an effective watching space area box (2) is tracked, a human eye pupil position signal is transmitted to the image control module (4), the image control module (4) converts image data into a light field 3D image, a parallax 3D image or a plane image according to a watching mode selected by a user, and synchronously sends the human eye position signal to the image generation module (5) to form an image light beam, and the image light beam is projected to the human eyes after exiting through the reflective free-form surface distortion compensation lens (32) and the reflective free-form surface field lens (31) in sequence.

2. The 2D/3D/light field full-compatible virtual imaging display system according to claim 1, wherein the reflective free-form surface field lens (31) is a front coated concave lens, the reflective free-form surface distortion compensation lens (32) is a front coated lens, the reflective free-form surface field lens (31) is used for providing a human eye viewing field, and the free-form surface distortion compensation lens (32) is used for compensating the distortion of the reflective free-form surface field lens (31) and the left-right direction of the picture, and simultaneously folding the light path.

3. The 2D/3D/light field fully compatible virtual imaging display system according to claim 2, wherein the size of the reflective free form surface field lens (31) is such that: the width is more than 2 × d × tan15 °, and the height is more than 2 × d × tan15 °, wherein d is the distance from the center of the effective viewing space region box (2) to the reflective free-form surface field lens (31); the reflective free-form surface distortion compensating mirror (32) is a convex mirror or a concave mirror according to the designed magnification.

4. The 2D/3D/light field full-compatible virtual imaging display system according to claim 2, wherein the image generation module (5) comprises a planar light field display source (51), a beam splitter (52) and a directional backlight parallax type naked eye 3D display source (53), the planar light field display source (51) provides full-parallax stereoscopic display without amplitude conflict, the directional backlight parallax type naked eye 3D display source (53) provides a planar 2D or full-resolution left-right parallax stereoscopic image, the planar light field display source (51) is orthogonally arranged with the directional backlight parallax type naked eye 3D display source (53) and forms an included angle of 45 degrees with the beam splitter of the beam splitter (52).

5. The 2D/3D/light field full-compatible virtual imaging display system according to claim 4, wherein the surface of the planar light field display source (51) and the surface of the directional backlight parallax type naked eye 3D display source (53) are kept consistent with the central optical path of the beam splitting surface of the beam splitter (52).

6. The 2D/3D/light field full-compatible virtual imaging display system according to claim 5, wherein the position of the effective viewing space region box (2) is near the image space focus of the optical module (3) composed of the reflective free-form surface field lens (31) and the reflective free-form surface distortion compensation lens (32), human eyes are allowed to move in the effective viewing space region box (2), and the object space focus of the optical module (3) is at the positions of the light field display source surface of the planar light field display source (51) and the surface of the backlight parallax naked eye 3D display source (53).

7. The 2D/3D/light field full-compatible virtual imaging display system according to claim 5, wherein the planar light field display source (51) comprises a first polygonal backlight module (511), a first linear Fresnel lens array (512), a first linear diffusion film (513), a first liquid crystal display panel (514), a first phase retardation film (515), an imaging lens array (516) and a directional diffusion film (517) which are sequentially arranged, the first polygonal backlight module (511) is provided with LED beads, when the system is in a light field display mode, the planar light field display source (51) is used for displaying, the directional backlight parallax type naked eye 3D display source (53) is closed, and the image control module (4) sends a light field display image to the liquid crystal display panel (514), and controlling the corresponding LED lamp beads on the first polygonal backlight module (511) to be lightened according to the human eye position information captured by the human eye tracking module (1), forming a collimated light source through a linear Fresnel lens array (512), diffusing the collimated light source through a linear diffusion film (513), delivering a light field image on a liquid crystal display panel (514) to the air through a phase delay film (515) and an imaging lens array (516) to form light field display, improving the spatial sampling rate by utilizing a directional diffusion film (517), and delivering the light field display light beam to a box positioned in an effective viewing space region through a beam splitter (52), a reflective free-form surface distortion compensation mirror (32) and a reflective free-form surface field lens (31) to deliver the light field image amplified without distortion to the box positioned in the effective viewing space region The human eye of (2).

8. The 2D/3D/light field fully compatible virtual imaging display system according to claim 7, wherein the pointing backlight parallax type naked eye 3D display source (53) comprises a second polygonal backlight module (531), a second linear Fresnel lens array (532), a second linear diffusion film (533), a second liquid crystal display panel (534) and a second phase delay film (535) which are sequentially arranged, LED lamp beads are arranged on the second polygonal backlight module (531), when the system is in a parallax type naked eye 3D display mode, the pointing backlight parallax type naked eye 3D display source (53) displays, the planar light field display source (51) is closed, the image control module (4) sends the parallax image switched in time sequence to the second liquid crystal display panel (534) and captures human eye position information according to the human eye tracking module (2), the second backlight module (531) is controlled to light the LED lamp beads corresponding to left and right eyes, two light beams switched in time sequence are formed through the second linear lens array (532), the two light beams switched in time sequence are formed, the parallax image of the second liquid crystal display panel (534) is sent to the left and right eye lens array (31) through the free field reflection mirror reflector, and the free field reflection compensation curved surface (32) which can accurately reflect the parallax image without distortion.

9. The 2D/3D/light field full-compatible virtual imaging display system according to claim 8, wherein when the system is in a planar 2D display mode, the directional backlight parallax type naked eye 3D display source (53) is used for displaying, the planar light field display source (51) is turned off, the image control module (4) sends a common planar image to the second liquid crystal display panel (534) and turns on all backlight beads on the second polygonal backlight module (531), and the common 2D image displayed on the second liquid crystal display panel (534) is sent to human eyes through the beam splitter (52), the reflective free-form surface distortion compensator (32) and the reflective free-form surface view field lens (31) through the second linear Fresnel lens array (532) and the second linear diffusion film (533).

10. The 2D/3D/light field fully compatible virtual imaging display system according to claim 9, wherein assuming that the width and height of the first liquid crystal display panel (514) or the second liquid crystal display panel (534) are both W and H, the focal length of the optical module is f, and the distance from the first liquid crystal display panel (514) or the second liquid crystal display panel (534) to the optical module is x, the virtual image after amplification has a width W = W f/x and a height H = H f/x, wherein x is generally between 0 and 30.

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