WO2019037148A1

WO2019037148A1 - Device and method for automatically adjusting position of stereoscopic projection device

Info

Publication number: WO2019037148A1
Application number: PCT/CN2017/100113
Authority: WO
Inventors: 王伟
Original assignee: 深圳市乐视环球科技有限公司
Priority date: 2017-08-22
Filing date: 2017-09-01
Publication date: 2019-02-28
Also published as: CN107367895A

Abstract

A device and method for automatically adjusting a stereoscopic projection position. The device comprises a stereoscopic projection device (100), a beam splitter (141), an upper optical path reflector (131), a lower optical path reflector (132), a lens (151), an upper optical path polarization status regulator (121), an intermediate optical path polarization status regulator (122), a lower optical path polarization status regulator (123), an upper optical path liquid crystal box light blocking device (101), an intermediate optical path liquid crystal box light blocking device (102), a lower optical path liquid crystal box light blocking device (103), a liquid crystal box light blocking device control module (104), an upper optical path vertical adjustment motor (105), an upper optical path horizontal adjustment motor (106), a lower optical path vertical adjustment motor (107), a lower optical path horizontal adjustment motor (108), a zoom adjustment motor (109), a motor control module (110), a comprehensive processing module (111), a camera (112), and a projector (200).

Description

Device and method for automatically adjusting position of stereoscopic projection device

Technical field

The present invention relates to a stereoscopic projection device position adjusting device and method, and more particularly to automatically adjusting the position of the device at the projector, allowing the image to be projected at a more suitable position on the screen to more uniformly project the upper and lower reflected beams.

Background technique

Generally, the stereoscopic projection device is placed in front of and behind the lens of the single projector, and the stereoscopic image display system of the single projector type can alternately realize the left and right images of the three-dimensional vision of the human eye, and divide the left and right eyes of different polarized lights respectively. Receiving respective images to realize three-dimensional vision, and more particularly, a stereoscopic projection device is a stereoscopic projection device with an automatic adjustment function, which can automatically adjust the positions of the projected beam and the reflected beam to adjust the two to coincide Position, to achieve the best stereo image effect, while the device has a separate shading module that blocks the projected beam and reflected beam. However, the projection system requires manual adjustment of the position of the stereoscopic image display device relative to the projector, so that the projected image is projected at an appropriate position on the screen. Using image recognition technology, the automatic completion of the adjustment can greatly save the adjustment time, improve the adjustment accuracy, and save manual work intensity.

Summary of the invention

The technical problem to be solved by the present invention is a method and apparatus for automatically adjusting a stereoscopic projection position for solving the problems of the prior art.

The technical solution adopted by the present invention to solve the above technical problems is as follows:

A device for automatically adjusting a stereoscopic projection position, comprising: a stereoscopic projection device (100), a beam splitter (141), an upper optical path reflector (131), a lower optical path reflector (132), a lens (151), and an optical path polarization State adjuster (121), medium optical path polarization state adjuster (122), lower optical path polarization state adjuster (123), upper optical path liquid crystal cell shading device (101), medium optical path liquid crystal cell shading device (102), lower optical path liquid crystal The box shading device (103), the liquid crystal box shading device control module (104), the upper optical path vertical adjusting motor (105), the upper optical path horizontal adjusting motor (106), and the lower optical path vertical adjustment a motor (107), a lower light path level adjustment motor (108), a zoom adjustment motor (109), a motor control module (110), an integrated processing module (111), a camera (112), and a projector (200); The camera (112) acquires a screen image, and the upper light path level adjusting motor (106) processes the image captured by the camera (112) for analysis, sends a motion command to the linear displacement mechanism (500), and the first motion of the linear displacement mechanism (500) The component (502) provides power to the movement, the linear position mechanism up and down movement module (501); the angle adjustment mechanism (600), the angle adjustment slide table (601), provides power to the angle adjustment slide table, so that it can Adjust the inclination of the device.

Preferably, the stereoscopic projection device (100) is placed in front of the projector (200), and the light projected by the projector (200) is projected on the screen.

Preferably, the controller (160) is wirelessly connected to the handheld smart device, and the handheld smart device is installed with a dedicated adjustment application, through which the manual adjustment is selected, and the trigger position button is used to move the linear position mechanism up and down. The module (501) is respectively moved up and down and the angle adjustment slide (601) is rotated forward or backward to allow the device to be adjusted to a suitable position.

A method for automatically adjusting a stereoscopic projection position, comprising:

Shooting the position of the image projected by the stereoscopic projection device in the screen by the projector;

The position is analyzed, and an execution command is sent to the actuator to adjust the image to the appropriate position of the screen; and the position is determined by the image acquired by the camera until the image is determined to be a suitable position, and the adjustment is completed.

Preferably, the method includes: the stereoscopic projection device (100) is placed in front of the projector (200), and the light projected by the projector (200) is projected on the screen; the position of the screen is determined, and the upper edge line and the lower edge line of the screen are selected. As a reference, the projector is required to project pure white light to illuminate the screen. After the screen is illuminated, the projector shoots the screen, and in the screen image, the upper and lower edge lines of the screen are calibrated. Reference standard

The projector needs to project a field-shaped image onto the screen, and let the upper and lower reflected beams not be projected on the screen, only the intermediate projected beam;

The camera (112) captures an image on the screen, and sends the image information to the controller (160). The controller (160) determines whether the field position is located at the center of the screen by an image recognition algorithm to determine whether the projection position is qualified.

Preferably, the method of determining the image position on the screen is:

In the foregoing adjustment process, the upper edge line 301 and the lower edge line 302 of the screen, the upper edge 303 and the lower edge line 304 of the field image are recorded, and the distance between the upper edge of the line 301 and the upper edge of the 303 is calculated as X1, and the lower edge line 302 is calculated. The distance from the lower edge line 304 is X2;

If X1 and X2 are not equal, it is judged as unqualified, and the controller (160) sends a control model to the linear displacement mechanism (500), and the first motion component (502) supplies power to the linear position mechanism up and down motion module (501). When the stereoscopic projection device (100) is moved up and down, and finally X1 and X2 are equal, it is determined that the image of the middle light path is located at the middle of the screen.

Preferably, the method further comprises adjusting a front-back tilt angle of the stereoscopic projection device (100) in a horizontal direction, the adjustment process is:

First, the image light of the light path is turned off, the medium light path liquid crystal box shading device (102) is turned off, and the upper and lower reflected light beams are projected on the screen, and the image light of the upper reflected light beam is the upper half of the field shape, and the upper line mark is 305. The image light of the lower reflected beam is the lower half of the field, and the lower line is labeled 306;

The controller (160) calculates that the distance between the upper edge line of the 301 screen and the 305 is X3, and the distance between the lower edge line of the 302 screen and the 306 is X4. If the distance of the X3 is not equal to the distance of X4, the controller is judged to be unqualified, and the controller sends control. The model provides power to the angle adjustment mechanism (600), 602, and the second motion assembly to the angle adjustment slide (601) until it is adjusted to X3 and X4.

Preferably, the camera needs to project a field-shaped image onto the screen, and at the same time, the upper and lower reflected beams are not projected on the screen, and only the intermediate projected beam is displayed, including:

The upper light path liquid crystal cell shading device (101) and the lower light path liquid crystal cell shading device (103) are turned off, so that the upper and lower reflected light beams cannot be projected through the stereoscopic projection device (100).

Preferably, the projector needs to project a field-shaped image onto the screen, and at the same time, the upper and lower reflected beams are not projected on the screen, and only the intermediate projected beam is displayed, including:

Adjusting the up and down inclination angle of the upper light path reflector (131) and the lower light path reflector (132) to rotate the upper light path reflector (131) upward to the limit position, so that the reflected image of the upper light path moves horizontally upward to the uppermost position, and Move to an image where there is no part that coincides with the image of the Zhongguang Road;

At the same time, the lower optical path reflector (132) is rotated downward to the extreme position, so that the reflected image of the lower optical path moves downward to the lowermost position, where no reflected portion of the optical path coincides with the intermediate optical path.

The invention can accurately capture the image position formed by the transmitted beam and the reflected beam, and precisely adjusts the transmitted beam and the reflected beam. The projected beam and the reflected beam of the device have the function of being individually turned off, and have a good effect.

Other features and advantages of the invention will be set forth in the description which follows, The objectives and other advantages of the invention may be realized and obtained by means of the structure particularly pointed in the appended claims.

DRAWINGS

The invention will be described in detail below with reference to the drawings in order to make the above advantages of the invention more clear. among them,

1 is a schematic view of an apparatus for automatically adjusting the position of a stereoscopic projection device of the present invention;

Figure 2 is a schematic view of the apparatus for automatically adjusting the position of the stereoscopic projection device of the present invention;

3 is a schematic diagram of a method for automatically adjusting the position of a stereoscopic projection device of the present invention;

4 is a schematic diagram of a method for automatically adjusting the position of a stereoscopic projection device of the present invention;

Figure 5 is a schematic illustration of a method of automatically adjusting the position of a stereoscopic projection device of the present invention;

Figure 6 is a schematic illustration of a method of automatically adjusting the position of a stereoscopic projection device of the present invention;

Figure 7 is a schematic illustration of a method of automatically adjusting the position of a stereoscopic projection device of the present invention;

Figure 8 is a schematic illustration of a method of automatically adjusting the position of a stereoscopic projection device of the present invention;

Figure 9 is a schematic illustration of an apparatus for automatically adjusting the position of a stereoscopic projection device of the present invention.

Detailed ways

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings and embodiments, in which the present invention can be applied to the technical problems, and the implementation of the technical effects can be fully understood and implemented. It should be noted that the various embodiments of the present invention and the various features of the various embodiments may be combined with each other, and the technical solutions formed are all within the scope of the present invention.

Additionally, the steps illustrated in the flowchart of the figures may be executed in a computer system such as a set of computer executable instructions, and although the logical order is illustrated in the flowchart, in some cases may be different The steps shown or described are performed in the order herein.

Embodiment 1:

An apparatus and method for automatically adjusting the position of a stereoscopic projection device relative to a projector is disclosed. The device includes: a projector that detects a position of the projected image; a controller that analyzes image information acquired by the projector; performs a motion mechanism that moves the stereoscopic image display device up and down; and adjusts the angle of the stereoscopic image display device in a horizontal direction The angle adjustment module; the stereoscopic projection device realizes the display of the stereoscopic image, and the stereoscopic projection device has the following features, capable of accurately capturing the image position formed by the transmitted beam and the reflected beam, and accurately adjusting the transmitted beam and the reflected beam. The projected beam and reflected beam of the device have the function of being individually turned off.

A device for automatically adjusting a stereoscopic projection position, comprising: a stereoscopic projection device (100), a beam splitter (141), an upper optical path reflector (131), a lower optical path reflector (132), a lens (151), and an optical path polarization State adjuster (121), medium optical path polarization state adjuster (122), lower optical path polarization state adjuster (123), upper optical path liquid crystal cell shading device (101), medium optical path liquid crystal cell shading device (102), lower optical path liquid crystal The box shading device (103), the liquid crystal box shading device control module (104), the upper optical path vertical adjusting motor (105), the upper optical path horizontal adjusting motor (106), the lower optical path vertical adjusting motor (107), and the lower optical path horizontal adjusting motor ( 108), a zoom adjustment motor (109), a motor control module (110), an integrated processing module (111), a camera (112), and a projector (200); wherein the camera (112) acquires a screen image, a light path The horizontal adjustment motor (106) processes the image captured by the camera (112) for analysis, sends a motion command to the linear displacement mechanism (500), and the first motion component (502) of the linear displacement mechanism (500) provides power to the motion. Linear position mechanism up and down motion module (501); Said angle adjustment mechanism (600), the angle adjustment slide (601), provides power to the angle adjusting slide, the adjusting device can be allowed to tilt.

Preferably, the controller (160) is wirelessly connected to the handheld smart device, and the handheld smart device is installed with a dedicated adjustment application, through which the manual adjustment is selected, and the trigger position button is used to move the linear position mechanism up and down. Module (501) up and down motion and angle adjustment The slider (601) is rotated forward or backward to adjust the device to the proper position.

Wherein, the present invention mainly captures the position of the image projected by the stereoscopic projection device in the screen by the projector, analyzes the position by using image recognition technology, and simultaneously sends an execution command to the actuator to adjust the image to the appropriate position of the screen, and then passes the image. The image acquired by the imaging determines the position until the image is determined to be a suitable position, and the adjustment is completed.

Embodiment 2:

The invention assists in adjusting the positional relationship between the stereoscopic projection device with the automatic adjustment function and the projector, and projects the image to a more suitable position of the screen. In order to better understand the working process of the invention, it is necessary to first introduce the automatic adjustment with the belt. Functional stereoscopic projection device. The stereoscopic projection device adjusts the stereoscopic projection device with reference to FIG. 1. For a better understanding of the device, the upper reflected beam split by the beam splitter is referred to as an upper optical path; the lower reflected beam is referred to as a lower optical path; The projected beam is called the medium beam path. The device specifically includes a stereoscopic projection device (100), a beam splitter (141), an upper optical path reflector (131), a lower optical path reflector (132), a lens (151), an upper optical path polarization state adjuster (121), and Optical path polarization state adjuster (122), lower optical path polarization state adjuster (123), upper optical path liquid crystal box shading device (101), medium optical path liquid crystal cell shading device (102), lower optical path liquid crystal cell shading device (103), liquid crystal Box shading device control module (104), upper optical path vertical adjustment motor (105), upper optical path horizontal adjustment motor (106), lower optical path vertical adjustment motor (107), lower optical path horizontal adjustment motor (108), zoom adjustment motor (109) ), a motor control module (110), an integrated processing module (111), a camera (112), and a projector (200).

The stereoscopic device position automatic adjusting device comprises a camera (112) for acquiring a screen image, 160 processing an image captured by the camera (112) for analysis, sending a motion command to the linear displacement mechanism (500), and a linear displacement mechanism ( 500) is a first motion component that provides power to the modified motion, and 501 is a linear position mechanism up and down motion module. An angle adjustment mechanism (600), 601 is a second motion assembly that provides power to the angle adjustment slide (601) to adjust the tilt of the device.

In addition to the ability to automatically capture images using the camera to adjust the position of the device, the controller (160) is also open for manual adjustment. The controller (160) can be connected to the handheld smart device wirelessly, and the handheld device can only be installed with a dedicated adjustment application. FIG. 7 is a schematic diagram of the application interface, through which the manual adjustment can be selected, and the trigger button can be used. Let the position of the line The mechanism up and down motion module (501) respectively moves up and down and the angle adjustment slide (601) to rotate forward or backward to adjust the device to a suitable position.

Embodiment 3:

Preferably, the method of determining the image position on the screen is:

First turn off the image light of the Zhongguang Road, turn off the light path of the LCD light box (102), and let The upper and lower reflected beams are projected on the screen, and the image light of the upper reflected beam is the upper half of the square shape, the upper line is labeled 305, the image light of the lower reflected beam is the lower half of the field shape, and the lower line is labeled 306;

Embodiment 4:

The implementation process is specifically as follows:

The stereoscopic projection device (100) is placed in front of the projector (200), and the light projected by the projector (200) is projected on the screen.

First determine the position of the screen, select the upper edge line and the lower edge line of the screen as the reference datum, and the projector needs to project pure white light to illuminate the screen. After the screen is illuminated, the projector shoots the screen, and the screen is shot. In the image, the upper and lower edge lines of the screen are calibrated as a reference. As shown in Figure 3, the upper edge line of the screen is labeled 301 and the lower edge line is labeled 302.

Then the camera needs to project a line-shaped image onto the screen, and let the upper and lower reflected beams not be projected on the screen, only the middle projected beam is displayed, and the upper edge of the middle projected beam is marked 303, the lower side The line is labeled 304, see Figure 4. The reason why the upper and lower reflected beams are not projected on the screen is that, in the initial state, the stereoscopic projection device (100) displays an image projected by a complete projector, and the upper reflected beam is the upper half of the projected image of the projector. In part, the lower reflected beam is the lower half of the projected image of the projector, and the upper reflected beam and the upper half of the intermediate light path do not necessarily coincide, and the lower reflected beam and the lower half of the intermediate light path do not necessarily coincide, which may cause the image to have a ghost image. , influence judgment, so it is necessary to let the upper and lower reflected beams cannot be projected on the screen. The upper and lower reflected beams are not projected onto the screen. This patent describes two methods. The first type of device is used to turn off the upper light path liquid crystal cell light blocking device (101) and the lower light path liquid crystal cell light blocking device (103) so that the upper and lower reflected light beams cannot be projected through the stereoscopic projection device (100). The second method is: adjusting the up and down inclination angles of the upper light path reflector (131) and the lower light path reflector (132), so that the upper light path reflector (131) is rotated upward to the limit position, so that the reflected image of the upper light path will move horizontally upward. Move to the top position and move to the image where there is no part that coincides with the image of the light path. At the same time, the lower optical path reflector (132) is rotated downward to the limit position, so that the reflected image of the lower optical path moves downward to the lowermost position, and at this position, the reflected image of the optical path does not have any part coincident with the intermediate optical path, as shown in the figure. 5.

The camera (112) captures an image on the screen, and sends the image information to the controller (160). The controller (160) determines whether the field cursor is located at the center of the screen by an image recognition algorithm to determine the projection position. whether it is passed. The method for judging the image position on the screen is:

In the foregoing adjustment process, the upper edge line 301, the lower edge line 302 of the screen, the upper edge 303 and the lower edge line 304 of the field image are recorded, and the distance between the upper edge of the image recognition algorithm technique 301 and the upper edge of the 303 is X1, The distance between the edge line 302 and the lower edge line 304 is X2. If X1 and X2 are not equal, it is judged as unqualified, and the controller (160) sends a control model to the linear displacement mechanism (500), and the first motion component (502) supplies power to the linear position mechanism up and down motion module (501). When the stereoscopic projection device (100) is moved up and down, and finally X1 and X2 are equal, it is determined that the image of the middle light path is located at the middle of the screen.

The image projected by the projector may appear that the upper half of the image and the lower half of the image cannot be equally projected onto the upper path reflector (131) and the lower path reflector (132), which causes the lower half of the projector. The partial image projection onto the upper light path reflector (131) (or the phenomenon in which the image of the upper half of the projector is projected onto the lower light path reflector (132)) causes image disorder. At this point we need to adjust the front and rear tilt angle of the stereoscopic projection device (100) in the horizontal direction, the adjustment process is: first close The image light of the optical path is turned off, and the light-blocking device (102) of the optical path is closed, and the upper and lower reflected beams are projected on the screen, and the image light of the upper reflected beam is the upper half of the field, the upper line is marked 305, and the lower reflected beam is The image light is the lower half of the field, and the lower line is labeled 306. The controller (160) calculates that the distance between the upper edge line of the 301 screen and the 305 is X3, and the distance between the lower edge line of the 302 screen and the 306 is X4. If the distance of the X3 is not equal to the distance of X4, the controller is judged to be unqualified, and the controller sends control. The model provides power to the angle adjustment mechanism (600), 602, and the second motion assembly to the angle adjustment slide (601) until it is adjusted to X3 and X4. See Figure 6

It should be noted that, for the foregoing method embodiments, for the sake of simple description, they are all expressed as a series of action combinations, but those skilled in the art should understand that the present application is not limited by the described action sequence. Because certain steps may be performed in other sequences or concurrently in accordance with the present application. In the following, those skilled in the art should also understand that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

Those skilled in the art will appreciate that embodiments of the present application can be provided as a method, system, or computer program product. Thus, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment in combination of software and hardware.

Moreover, the application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

It should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, although the present invention has been described in detail with reference to the foregoing embodiments, Modifications may be made to the technical solutions described in the foregoing embodiments, or some of the technical features may be equivalently replaced. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

A device for automatically adjusting a stereoscopic projection position, comprising: a stereoscopic projection device (100), a beam splitter (141), an upper optical path reflector (131), a lower optical path reflector (132), and a lens (151) , light path polarization state adjuster (121), medium light path polarization state adjuster (122), lower light path polarization state adjuster (123), upper light path liquid crystal box light shielding device (101), medium light path liquid crystal cell light shielding device (102) , lower light path liquid crystal cell light shielding device (103), liquid crystal cell light shielding device control module (104), upper light path vertical adjustment motor (105), upper light path horizontal adjustment motor (106), lower light path vertical adjustment motor (107), lower light path a horizontal adjustment motor (108), a zoom adjustment motor (109), a motor control module (110), an integrated processing module (111), a camera (112), and a projector (200); wherein the camera (112) acquires a screen The image, the light path level adjustment motor (106) processes the image captured by the camera (112) for analysis, sends a motion command to the linear displacement mechanism (500), and the first motion component (502) of the linear displacement mechanism (500), Motion provides power, linear position mechanism Module (501); said angle adjusting means (600), the angle adjustment slide (601), powering the angle adjustment slide, allowed to tilt may be adjusted perspective projection apparatus.
The apparatus for automatically adjusting a stereoscopic projection position according to claim 1, wherein the stereoscopic projection device (100) is placed in front of the projector (200), and the light projected by the projector (200) is projected on the screen.
The apparatus for automatically adjusting a stereoscopic projection position according to claim 1 or 2, wherein the controller (160) is connected to the handheld smart device by wireless or other connection manner, and the handheld smart device is installed with a dedicated adjustment application. Program, through the application to select manual adjustment, through the trigger button, the linear position mechanism up and down motion module (501) can be moved up and down and the angle adjustment slide (601) is rotated forward or backward to allow the device to adjust to Suitable location.
A method for automatically adjusting a stereoscopic projection position, comprising:

Shooting the position of the image projected by the stereoscopic projection device in the screen by the projector;

The position is analyzed, and an execution command is sent to the actuator to adjust the image to the appropriate position of the screen; and the position is determined by the image acquired by the camera until the image is determined to be a suitable position, and the adjustment is completed.
The method of automatically adjusting a stereoscopic projection position according to claim 4, characterized in that, specifically, the stereoscopic projection device (100) is placed in front of the projector (200), and the projector (200) The projected light is projected on the screen; the position of the screen is determined, and the upper edge line and the lower edge line of the screen are selected as reference datums, and the projector is required to project pure white light to illuminate the screen, and after the screen is illuminated, the projector shoots Screen, in the screen image taken, calibrate the upper and lower edge lines of the screen as a reference;

The projector needs to project a field-shaped image onto the screen, and let the upper and lower reflected beams not be projected on the screen, only the intermediate projected beam;

The camera (112) captures an image on the screen, and sends the image information to the controller (160). The controller (160) determines whether the field position is located at the center of the screen by an image recognition algorithm to determine whether the projection position is qualified.
The method of automatically adjusting a stereoscopic projection position according to claim 5, wherein the method of determining an image at a screen position is:

In the foregoing adjustment process, the upper edge line 301 and the lower edge line 302 of the screen, the upper edge 303 and the lower edge line 304 of the field image are recorded, and the distance between the upper edge of the line 301 and the upper edge of the 303 is calculated as X1, and the lower edge line 302 is calculated. The distance from the lower edge line 304 is X2;

If X1 and X2 are not equal, it is judged as unqualified, and the controller (160) sends a control model to the linear displacement mechanism (500), and the first motion component (502) supplies power to the linear position mechanism up and down motion module (501). When the stereoscopic projection device (100) is moved up and down, and finally X1 and X2 are equal, it is determined that the image of the middle light path is located at the middle of the screen.
The method of automatically adjusting a stereoscopic projection position according to claim 5, further comprising adjusting a front-back tilt angle of the stereoscopic projection device (100) in a horizontal direction, wherein the adjusting process is:

First, the image light of the light path is turned off, the medium light path liquid crystal box shading device (102) is turned off, and the upper and lower reflected light beams are projected on the screen, and the image light of the upper reflected light beam is the upper half of the field shape, and the upper line mark is 305. The image light of the lower reflected beam is the lower half of the field, and the lower line is labeled 306;

The controller (160) calculates that the distance between the upper edge line of the 301 screen and the 305 is X3, and the distance between the lower edge line of the 302 screen and the 306 is X4. If the distance of the X3 is not equal to the distance of X4, the controller is judged to be unqualified, and the controller sends control. The model provides power to the angle adjustment mechanism (600), 602, and the second motion assembly to the angle adjustment slide (601) until it is adjusted to X3 and X4.
A method of automatically adjusting a stereoscopic projection position according to claim 5, wherein The projector projects a field-shaped image onto the screen, and at the same time, the upper and lower reflected beams are not projected on the screen, and only the intermediate projected beam is displayed, including:

The upper light path liquid crystal cell shading device (101) and the lower light path liquid crystal cell shading device (103) are turned off, so that the upper and lower reflected light beams cannot be projected through the stereoscopic projection device (100).
The method for automatically adjusting a stereoscopic projection position according to claim 5, wherein the projector needs to project a field-shaped image onto the screen, and at the same time, the upper and lower reflected beams are not projected on the screen, and only the intermediate projected beam is displayed, specifically including :

Adjusting the up and down inclination angle of the upper light path reflector (131) and the lower light path reflector (132) to rotate the upper light path reflector (131) upward to the limit position, so that the reflected image of the upper light path moves horizontally upward to the uppermost position, and The image moving to the upper reflected beam does not have any part coincident with the image of the intermediate light path;

At the same time, the lower optical path reflector (132) is rotated downward to the extreme position, so that the reflected image of the lower optical path moves downward to the lowermost position, where no reflected portion of the optical path coincides with the intermediate optical path.