JP2002268136A - Stereoscopic 3d image display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To generate a stereoscopic 3D image by projecting all frames of 2D images that a stereoscopic 3D image display generates on a fixed type projection device on a moving type screen through an optical equipment image transmission system and to enable a rotary motion type mechanism to move the screen by using rotational motion for generating effective reciprocal motion effect. SOLUTION: Three kinds of image transmission mechanism are available. The 1st type uses the rotary reciprocal motion mechanism so that a reflecting plate set is moved. The 2nd type couples a variable depth-of-focus mirror with a projection lens. The 3rd type is a far center lens. Those image transmission mechanisms are all able to fix the size and focus of a projection image on the screen during the movement of the screen. The 'rotary reciprocal motion' type mechanism can also be used to move the display panel so that a stereoscopic 3D image can directly be generated.

Description

DETAILED DESCRIPTION OF THE INVENTION

The present invention relates to the following patents and applications filed by the present applicant. US Patent 5,754,147, granted on May 19, 1998, US Patent 5,954,414, granted on September 21, 1999, U
S Patent Application No. 09 / 218,938, filed December 22, 1998, US
Patent application number 09 / 253,656, filed on February 20, 1999, Japanese patent application number 361090/99, filed on December 20, 1999, national application notice 2000-201362, July 18, 2000, US patent application number 09
/ 882,826, filed June 16, 2001, the applicant of which has incorporated the above patents and applications as references in this case.

[0002]

BACKGROUND OF THE INVENTION In related patents and applications by the applicant, US Pat. No. 5,954,414 to Tsao discloses that all frames of a 2D image created on a fixed projection device are reciprocated on a reciprocating screen through an opto-mechanical image transmission mechanism. Discloses a stereoscopic 3D display system that creates a stereoscopic 3D image by projecting a 3D image. The image transmission mechanism keeps the frame size and focus of the projected image unchanged on the mobile screen. Therefore 2
A set of D-images is distributed and displayed in a screen swept space. Due to the afterimage (or image persistence) effect, this set of frames of the 2D image forms a 3D stereoscopic image in the viewer's eyes.

The system can create stereoscopic 3D images using conventional 2D projection optics without the need for a collimated image beam. Ts
Japanese patent application 361090/99 by ao (National application notice 2000-2
01362) discloses a method of using a smooth rotating mechanism to create a reciprocating screen movement.
The application further improves the screen movement mechanism and the image transmission mechanism.

In another prior art, De Montebello discloses a system that uses a rotating spiral screen to create display space and a film projector to project a frame of 2D images onto the spiral screen (De Montebello 1969). ). The depth of the display space is limited by the depth of focus of the projector and is therefore small. Morton discloses another system that uses a rotating helical screen to form the display space, but also uses a distorted lens to accommodate variations in focal length from the image source to the surface of the helical screen. (Morton 1990).

[0005] Distortion lenses are difficult to fabricate and complicated to assemble. Its discontinuous nature impairs image quality. Another approach projects an image consisting of a collimated light beam directly on a mobile screen (Thompson 199
6). Usually this requires a laser as the light source, and thus is also more expensive than projector-based systems. Still other approaches use multiple electrically switchable liquid crystal display lasers (Hattori 1992, Sadovinik 1998). Other approaches have used piezoelectric-based rapid focus lenses to project image frames into multiple switchable PDLC screens (Paek 1996). Both approaches have a limited resolution because the number of LCD panels or screens therein is physically limited.

[0006]

SUMMARY OF THE INVENTION A stereoscopic 3D image display in the present invention projects an entire frame of a 2D image created on a fixed projection device on a mobile screen through an opto-mechanical image transmission mechanism. 3)
Create a D image. The image transmission mechanism keeps the frame size and focus of the projected image unchanged on a mobile screen. Therefore, the set of 2D images is distributed and displayed in the space swept on the screen. Due to the afterimage (or image persistence) effect, this set of frames of a 2D image forms a 3D stereoscopic image in the viewer's eyes.

[0007] Mobile screens periodically sweep through the display space, displaying a stereoscopic image therein. The preferred method of moving the screen is by "rotary reciprocation". This involves swirling a flat screen about an axis, with the screen surface always oriented in a fixed direction. That is, the screen pivots about the axis but does not rotate about itself. As a result, the movement of the screen can be swept over a rectangular space, and the screen appears to reciprocate within this rectangular space. There can be many mechanisms to create such movements. The preferred mechanism is to apply to support the screen with a set of rotating arms.

[0008] The image transfer mechanism relays the projected optical image from the image projector to a moving screen for the display. As the screen moves, the mechanism keeps the size and focus of the projected image frame constant. Three types of improved mechanisms can be used. The first is a reciprocating reflector mechanism. The reflector system is placed in the projection path between the image projector and the screen and moves in synchronism with the reciprocating screen to compensate for projection path length differences caused by screen movement.

A second mechanism is a zoom optical mechanism that can change both the focus and magnification of the projected 2D image in response to the reciprocating movement of the screen. Zoom optics can deliver the projected 2D image to a focused, mobile screen. It can maintain and adjust the size of the image frame that it projects to create the desired form of display space. The third mechanism is a far center lens.
The far center lens makes the size and focus of the projected image frame constant within a certain range as the screen moves. Image projectors are projecting by generating a set of 2D image frames on a mobile screen through an image transfer mechanism. An image projector generally includes an image generation panel, a projection lens, and a light source. The rotary reciprocating mechanism can be used to directly move a display panel that directly creates a stereoscopic 3D image.

FIG. 1 shows the basic concept of a stereoscopic 3D display based on a moving screen with an image transmission mechanism, and its system consists of three major parts. (1) Mobile screen: The screen 11, which is moving periodically, displays the projected image and forms its display space 12. (2) Image transmission mechanism: The image transmission mechanism 13 relays a projection beam 14, which includes a set of 2D image frames 14a that are projected from an image projector on a mobile screen for display. The mechanism keeps the size and focus of the projected image unchanged as the screen moves, and synchronizes the placement of the projected image frame with the mobile screen. This is basically a projection path compensation mechanism, since full frame projection directly from the projector to the screen is not desirable due to the constant movement of the screen.

(3) Image Projector: The image projector 15 generates a set of 2D image frames 14a on the movable screen 11 through the image transmission mechanism 13 and performs a project. Generally, an image projector comprises an image generation panel, a projection lens, and a light source.

By sweeping the screen periodically and rapidly across space and continuously projecting a series of 2D image frames on the screen, for example, the profile of the body 14a of FIG. The set can thereby be distributed and displayed over the display space, with the frame being located in a unique position in the space. Seen from outside the display space, that set of frames of a 2D image is a 3D stereoscopic image, due to the afterimage effect of the human eye. The image actually occupies space and can be viewed by many observers from different angles simultaneously without the need for any glasses.

The moving screen is sweeping the display space, displaying a stereoscopic image periodically. Screen movements include reciprocating sweeps as well as one-way sweeps by the entire screen or a portion of the screen surface. Figures 2a-d show a preferred reciprocating screen system that uses a smooth rotating mechanism to create a smooth reciprocating screen movement. This rotates the flat screen 11 around the axis 501, and constantly moves the screen surface in a fixed direction (z direction).
I keep it to go. That is, the screen pivots about the axis but does not rotate about itself. As a result, the screen movement can be swept across the rectangular space 12 in the z-direction, and
Shows that in this rectangular space the screen is z
It expresses moving back and forth along the direction. This screen movement can therefore be referred to as "rotary reciprocation". To capture the projection beam anywhere, the length of the screen 11 must be
Must be greater than 2 lengths.

Many mechanisms can create such a "rotary reciprocation". The preferred mechanism applies to a set of rotating arms carrying a screen as shown in FIG. 2a. The core mechanism has two pairs of rotating arms 510a-510d that are synchronously rotating. The rotating arm is fitted on an integrated machine base (not shown),
And can be driven by a motor with a timing belt system. The translucent screen 11 is attached to a support structure 520, which has two ends attached to two bars. The rods are incorporated into two pairs of rotating arms with rotating bearings 524. As the arm rotates, the screen moves accordingly and the display space 12 can be created by a screen sweep. Since the four rotating arms rotate synchronously, there is essentially no stress on the screen and rod combination during rotation. The screen and bar are therefore made of lightweight material. Each rotating arm can be balanced by a suitable weight distribution or by a suitable counterweight 530.

[0015] The mounting position and the placement of the screen on the support structure 520 can be adjusted as needed.
For example, FIG. 2e shows a different screen installation than FIG. 2a. FIG. 2f shows an exemplary mechanism for maintaining the rotating arm in synchronized movement. A timing belt and gear system on each surface 540 keeps the rotating arm in co-ordinate movement (such as 510a and 510c). The common axis 550 maintains the motion of the two-plane tuning motion. Motor 560 drives the entire mechanism.

3a-3c show another exemplary embodiment for a rotary reciprocating screen. FIG. 3a shows a cross-sectional view of the mechanism, and FIG. 3b is a front view. The rotating arm 610 is mounted on the machine base 600 and rotates around the axis 603. The shaft is fixed to the machine base, and the timing gear 605 is fixed to the shaft. The rotating arm has a protruding shaft 6 fixed at one end.
101. The second timing gear 610 is incorporated with a rotating bearing on the projected shaft. Gears 610 and 605 have the same pitch diameter and number of teeth. These are paired with the timing belt 630. The screen 11 and its support structure 620 are attached and fixed to the second gear 610, so that as the rotating arm 610 rotates, the screen turns with a surface that always faces in one direction. Alternatively, instead of using a timing belt, coupling between the two gears can be achieved using a third gear in between.

Another example of a reciprocating screen mechanism having a unidirectional sweep is a rotary spiral screen, such as the screen described by Morton in 1990, and De Monte in 1969.
Includes rotary spiral screen described by bello.

[0018] Three types of improved image transmission mechanisms can be used. The first mechanism is a reciprocating reflector mechanism. A reciprocating screen, but a reflector system tuned at half the screen speed, is placed in the projection path between the image reflector and the moving screen. This speed difference is kept constant between the mirror image of the projector and the moving screen as viewed through a reciprocating reflector system. FIG. 4a illustrates this idea with a reciprocating reflector system that includes a pair of reflectors.

A 2D image frame is created on the display panel 1501 and the reflector pair 1 is displayed on the screen 11.
3. Project with lens 1502 through 3.
The display panel and lens are fixed. The preferred angle between the two reflectors 1301 and 1302 is 90 °. The projection path 402 is preferably parallel to the screen movement path 401. Screen is position 11
Reciprocating between the camera and 11A to form a display space 12. As the screen 11 moves, the reflector pair 13 moves in the same direction as the screen, but at half the screen speed. As a result, the projection distance from the display panel to the screen is always kept constant. Therefore, the focus and magnification of the projected image can always be maintained.

The reciprocating reflector can be a single flat reflector as shown in FIG. 4b. In this case, the projection path 402 must reach the reflector 1300 at an angle less than 90 °. The resulting display space 12 has an oblique rectangular surface. Or FIG. 4c
As shown in FIG. 7, a TIR (total internal reflection) prism 1303 can be inserted to reduce the angle between the entrance projection path and the reflection path. If the projection beam is polarized, for example when using an LCD (Liquid Crystal Display) panel as an image panel, as shown in FIG. 4d, the incident beam must be reflected from the reflector and from the reflector into the same path 40. Alternatively, a polarizing beam splitter 1307 can be used in the device.

A quarter wave delay 1305 is required between the polarizing beam splitter and the reflector 1300. The polarization axis of the projection beam at 405 is adjusted and the beam is reflected by a polarizing beam splitter toward a reflector. After being reflected by the reflector and passing through a quarter wave retarder plate,
The quarter wave delay is adjusted to rotate the polarization axis of the projection beam by 90 °. The reflected beam can therefore pass through the polarizing beam splitter and the screen 1
1 can be reached. The resulting display space 12 has a rectangular surface.

As shown in FIG. 5a, a reciprocating motion of the reflector system can be achieved by using a slider crankshaft wheel. Alternatively, the same mechanism used to create the screen movement can be used to create the movement of the reflector system. For example, as shown in FIG.
01 and 1302 can be attached to a rotating arm system, which is a mechanism similar to the system of FIG. 2a. The reflector pair structures 1301 and 1302 can be replaced by a single surface reflector. Of course, other mechanisms may exist to create the reciprocating motion of the reflector system. The speed ratio between the screen and the reflector system can be maintained by using two two motors controlled by a microcomputer or by using mechanical means such as timely belts and gears.

The second image transmission mechanism is a zoom optical mechanism, which can change both the focus and magnification of the projected 2D image in response to the reciprocating movement of the screen. Zoom optics can transmit the projected 2D image on a moving screen in focus. The size of the projected image frame can be maintained and adjusted to create the desired form of display space. Generally, zoom optics is integrated with the image projector system.

A related patent by the applicant, US Patent 5,954,
Reference numeral 414 discloses an example of a movable zoom lens. FIG. 6 shows the idea. The zoom lens 1101 projects the image on the display panel on the mobile screen. Numerical controller 1103 controls actuator 1101 to adjust the focus and zoom magnification of the lens according to the position of the mobile screen as detected by position sensor 1104.

In addition to zoom lenses, there are other zoom optics (or variable focal length optics) that can be used with fixed focal length optics. A second example of a zoom optical mechanism uses a variable focal length mirror. The variable focal length mirror has a thin reflective film whose curvature can be changed to a plane mirror, concave mirror or convex mirror in response to a drive signal, usually acoustic pressure. Details of the mechanical structure of the variable focal length mirror are Rawson 1
967 can be found. FIG. 7 shows the principle of a variable focal length mirror using an optical trace. Reflective surface is flat 7
If 03F, the mirror image 790F of the object 790 occurs at the image distance O'M = OM. The reflecting surface is distorted and the convex mirror 7
If it makes 03X, the mirror image of the object 790 becomes smaller and approaches the mirror. The focal length MFx corresponds to the convex mirror 703x, and decreases as the mirror curvature increases. If the reflecting surface is a concave mirror 703V, the mirror image of the object will be large and move away from the mirror 790V. Again, the focal length of the mirror MFv decreases as the mirror curvature increases. From FIG. 7, it can be seen that the vibrating variable focal length mirror can change not only the location of the image but also the size of the image. Image size and image position are interrelated and are determined by the object distance (OM) and the focal length of the variable focal length mirror.

In order to maintain the focus and magnification of the image projected on the moving screen, only one variable focal length mirror is used, despite generally requiring two types of variable focal length members. Specially tuned structures can also have a fixed focus and magnification. FIG. 8 shows a preferred embodiment. The variable focal length mirror 820 is connected to the image panel 1501 and a normal projection lens (fixed focal length) 1 which is a normal projection lens.
502 in the optical path. TIR prism 8
01 is used again with the variable focal length mirror. In such an arrangement, the variable focal length mirror thus changes both the effective image distance (from the image panel to the projection lens) and the effective size of the image panel in a correlated manner as it vibrates. When the variable focal length mirror becomes a convex mirror, the image panel appears closer to the projection lens than the actual panel when viewed by the variable focal length mirror. as a result. The image on the panel is projected at point B. If the variable focal length mirror is a concave mirror, the panel image 1501V will appear closer to the projection lens in the vision of the variable focal length mirror. As a result, the image on the panel is projected to point A, at a shorter image distance.

The change in projection distance is thus consistent with the reciprocating motion of the moving screen, the range from A to B. The variable focal length mirror also changes the size of the panel image. If the variable focal length mirror becomes a convex mirror, the image of the panel will appear smaller than the actual panel. If the variable focal length mirror becomes a concave mirror, the panel image will appear smaller than the actual image. However, this change in magnification can be compensated for by a change in the distance of the object to the projection lens. Projection lens 150
Through 2, the image projected at position B has a large magnification because the ratio of the projection distance to the object distance is large, while the image projected at position A has a small ratio of the projection distance to the object. Therefore, it has a small magnification. As a result, the change in magnification induced by the variable focal length mirror can be reduced or canceled by appropriately matching the magnification change to the object distance change induced by the variable focal length mirror.

FIG. 9 shows an exemplary embodiment that includes a variable focal length mirror 820 located in the optical path between the projection lens 9001 and the screen. In this arrangement, the projection lens itself is receiving the effect of the variable focal length mirror. Actuator mechanism 9002
Therefore, there is another parameter that is added to adjust the position of the projection lens, so that there is control to match the focus and magnification of the projected image on the screen. The TIR prism 801 directs the projection beam from the projection lens to the variable focal length mirror, and then sends the reflected beam from the variable focal length mirror to the screen 11.

The actuator mechanism 9002 can also change the object distance measured from the image panel 1501 to the lens 9001. When the variable focal length mirror is in the convex mirror mode, the images of the projection lens and the panel appear smaller than the actual size. The image on the panel is projected on screen 11 at location B. When the variable focal length mirror is in the concave mirror mode, the images of the projection lens and the panel appear larger than the actual size. By adjusting the object distance between the projection lens and the image panel, the image on the image panel can be projected to the position A with the desired size, and the desired size can be represented by B. You can choose to match the size of your image. As a result, the display space has a rectangular surface.

In general, any reflector with a variable focal length can achieve the above function by using a variable focal length mirror. The invention is therefore not limited to the construction of the variable focal length mirror. The selection and design of the parameters of the optical components to achieve the above functions can be performed by those skilled in the art based on geometrical optics, and will not be described in detail here.

The third image transfer mechanism has a lens at the far center. Far center lenses are commonly used for imaging for machine vision to provide an undistorted image of the object by central perspective. When using a normal lens to create a three-dimensional object staggering within depth, the image appears distorted in central perspective, which is large near, but small when viewed away. appear. The far center lens corrects this distortion within the far center range by collimating the main rays from the object to the lens.

As a result, images of objects with depth can be free of parallax or scale errors. The depth of focus of the far center lens can also be designed to match the far center range. In other words, the flat object image appears to have a constant size and is in focus no matter where the object is located as long as it is within the far center range. This feature allows this type of long distance lens to be used as a projection lens, as shown in FIG. The object side of the telecentric lens (ie, the side on which the 3D object is placed) is used as the image side of the projection. The screen reciprocates between A and B within the far center range. The display panel 1501 of the projector is the image side of the long distance center lens (ie, the side on which the camera is placed).
Is taking position. The telecentric lens 1000 works as an image transmission mechanism without moving parts.

All the reciprocating image transfer mechanisms described above maintain focus and magnification of the projected image as the screen moves. If desired, despite varying magnification, the image transmission mechanism can tune only the projection focus to the mobile screen. Due to the change in magnification, the display space has a trapezoidal surface instead of a rectangular surface. But the mechanism can be simplified accordingly. When the image projector has a large depth of focus, even synchronized focus is not required. Such a deep focus projector can project an image frame on a mobile screen without apparent defocus in the projected image.

The image projector has an image creation panel, a projection lens, and a light source. The image creation panel can generally be any type of projection device, such as an LCD (Liquid Crystal Display) or a CRT (Cathode Ray Tube). Lasers and laser scanning systems can also be image projectors for the purposes of the present invention. For best results, a high frame rate image panel is preferred. Devices capable of high frame rates are LED (light emitting diode) FLC (ferroelectric liquid crystal) display, DMD
(Digital micromirror device) and TMA (thin film micromirror array). (See [Clark 1981], [Mignardi 1994], [KIm & H
wang 1999])

Instead of projecting the image on a mobile screen to create a stereoscopic 3D image, a "rotary reciprocating" mechanism directly converts the stereoscopic 3D image as shown in FIG. The created flat panel display can be driven (moved). Preferred flat panel display 2001 is LED (light emitting diode) or OLED (organic light emitting diode)
May be mounted on the substrate. The flat panel display can also be mounted on a support structure 520, which is driven by two pairs of rotating arms as in FIG. 2a. Similarly, the overall length of the flat display panel is greater than the length of the display space 12. As the flat panel pivots to different positions, each corresponding 2D image frame of the stereoscopic 3D image to be displayed needs to be maintained in the display space. This can be achieved by displaying each 2D image frame at a different position on a flat panel display, with a displacement (offset) that matches the position in the display space, as shown in FIG. An image signal can be sent to a flat panel display by a cable 2002 connecting the display to the controller 2003. The cable can be made with very little stiffness, so that its effect on display movement is minimized. Or wireless communication can replace physical cables. By using a rotary reciprocating mechanism, distortion on the display panel can also be minimized. References

[Outside 1]

[Brief description of the drawings]

The invention can be described in detail with the aid of the following figures.

FIG. 1 shows the basic concept of a stereoscopic 3D image display based on a moving screen with an image transmission mechanism in the prior art.

FIG. 2a is an embodiment according to an example of a moving screen with a rotary reciprocating mechanism.

FIG. 2b is an example embodiment of a mobile screen with a rotary reciprocating mechanism.

FIG. 2c is an example embodiment of a mobile screen with a rotary reciprocating mechanism.

FIG. 2d is an example embodiment of a mobile screen with a rotary reciprocating mechanism.

FIG. 2e is an example embodiment of a mobile screen with a rotary reciprocating mechanism.

FIG. 2f is an example embodiment of a mobile screen with a rotary reciprocating mechanism.

FIG. 3a is an embodiment according to another example of a movable screen by a rotary reciprocating mechanism.

FIG. 3b is an embodiment of another example of a movable screen using a rotary reciprocating mechanism.

FIG. 3c is a view of another example of a moving screen using a rotary reciprocating mechanism.

FIG. 4a shows the principle of a reciprocating reflector mechanism and an image transmission mechanism according to an exemplary modification.

FIG. 4b illustrates the principle of a reciprocating reflector mechanism and an image transfer mechanism according to an exemplary modification.

FIG. 4c shows the principle of a reciprocating reflector mechanism and an image transmission mechanism according to an exemplary modification.

FIG. 4d illustrates the principle of a reciprocating reflector mechanism and an image transfer mechanism according to an exemplary modification.

FIG. 5a shows an embodiment according to an example of a reciprocating reflector mechanism.

FIG. 5b shows an embodiment according to an example of a reciprocating reflector mechanism.

FIG. 6 shows a prior art idea using a moving zoom lens.

FIG. 7 illustrates the optical function of a variable depth of focus mirror with prior art ray tracing.

FIG. 8 illustrates an example aspect of an image transmission mechanism using zoom optics based on a combination of a variable depth of focus mirror and a fixed projection lens.

FIG. 9 illustrates another example aspect of a zoom optical mechanism based on a combination of a variable depth of focus mirror and a movable projection lens.

FIG. 10 illustrates an example embodiment of an image transfer mechanism based on a far center lens.

FIG. 11 illustrates an embodiment according to an example of the present invention based on a moving flat panel display with a rotary reciprocating mechanism.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2H042 DD11 DE00 2H059 AA33 AA38 5C061 AA06 AA23 AB11

Claims (13)

[Claims] 1. A display surface is pivoted about an axis and the surface of the display surface is always kept in a fixed direction, and (2) a set of 2D image frames is sequentially placed on the display surface. Display on the
(3) a movement of the display surface that sweeps a predetermined display space, a stereoscopic 3D including these steps of distributing and distributing the 2D image frame in the display space to create a stereoscopic 3D display image.
How to display an image. 2. The method of claim 1, wherein the display surface is mounted on a support structure, and the support structure is driven by a synchronously rotating rotating arm system. 3. The method of claim 1, wherein the display surface comprises a flat panel display such as an array of light emitting diodes or organic light emitting diodes. 4. The method of claim 3, further comprising displaying the 2D image frame at an offset position on the flat panel display as the flat panel display pivots to a corresponding position. 5. The method according to claim 1, wherein the display panel is a translucent projection screen, and displaying a continuous 2D image frame comprises:
2. The method of claim 1 including displaying the image frames on a display panel in sequence, (2) projecting an image on the display on the screen. 6. The method of claim 5, wherein said step of projecting further comprises a projection path compensation step, wherein said projection path compensation step maintains the size and focus of the projected 2D image frame on the mobile screen. 7. The projection path compensation step includes the step of transmitting an image beam from the display panel first through a projection lens, and thereafter through reflection of the reciprocating reflector system, the reciprocating reflector system comprising: 7. The method of claim 6, wherein the reciprocating motion cooperates with the position of the screen. 8. The method of claim 7, wherein said reciprocating reflector system reciprocates linearly. 9. The method of claim 7, wherein the reciprocating reflector system pivots about an axis while always having the reflector surface facing in a fixed direction. 10. The method of claim 9 wherein said reciprocating reflector system is driven by a rotating arm system that is rotating in synchronization. 11. The projection path compensation step includes projecting an image beam from an image panel using zoom optics and changing the optical performance of the zoom optics in cooperation with the position of the screen. 7. The method of claim 6, wherein comprises at least one variable depth of focus lens or reflector. 12. The method of claim 6, wherein the projecting path compensation step includes projecting an image beam from an image panel using a far center lens. 13. A 2D image frame set is generated in sequence, (2) a 2D image frame is projected on a mobile projection screen through a projection path compensation means, and the projection path compensation step is performed by the mobile screen. Maintaining the size and focus of the 2D image frame projected above unchanged, its projection path compensating means always orienting the surface of the reflector in a fixed direction, corresponding to the position of the moving screen, around the axis A pivoting reciprocating reflector system, or zoom optics or a far center lens including at least one variable depth of focus lens or reflector having optical performance that varies with the position of the moving screen, 3) its display to sweep a given display space A method of displaying a three-dimensional 3D image, comprising the steps of: displaying and distributing the movement of the surface, the 2D image frame in a display space, and creating a three-dimensional 3D display image.