Automatic straightening system of projector

Abstract

The utility model provides an automatic straightening system for a projector, and the system comprises a projection flat plate which is provided with a rectangular reference marking line on a projection surface; the placing seat is used for placing a projector; the first three-axis rotary table is connected with the placing seat; the camera is used for shooting a projection picture of the projector on the projection flat plate; the upper computer is electrically connected with the camera and the first three-axis rotary table; wherein the upper computer receives a shot picture of the camera, when the camera directly faces the projection panel and the edge of the shot picture of the camera is matched with the rectangular reference marking line in shape, the upper computer sends a rotation angle to the first three-axis turntable according to the deflection degree of the projection picture in the shot picture, and the first three-axis turntable drives the placement seat to rotate; therefore, the projection picture in the shot picture is matched with the reference marking line in shape. According to the scheme, the projector can be automatically straightened, manual operation is not needed, subjective errors caused by manual straightening during production can be eliminated, and meanwhile the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of projector calibration, in particular to an automatic alignment system of a projector. BACKGROUND

[0002] The projector needs to be calibrated when it is produced, such as IMU calibration, trapezoidal correction calibration, etc. These calibration items are currently manually aligned with the projection picture, that is, the placement position and angle of the projector are adjusted so that the picture projected on the screen is a completely square rectangle. The posture of the projector at this time is taken as the reference parameter. Currently, the projector is usually manually aligned. Manual alignment requires high proficiency and accuracy of the operator, and manual placement has subjective errors. The operator also needs to repeatedly adjust the projector. It takes several minutes to calibrate a machine, which hinders the efficiency of the assembly line.

[0003] Therefore, it is necessary to provide an automatic alignment system of a projector without manual placement. CONTENT OF THE UTILITY MODEL

[0004] In view of the deficiencies of the prior art, the purpose of the present application is to provide an automatic alignment system of a projector without manual placement.

[0005] According to the embodiment of the present application, the first scheme is provided: an automatic alignment system of a projector, comprising:

[0006] A projection panel, the projection surface of which is provided with a rectangular reference line;

[0007] A placement seat for placing the projector;

[0008] A first three-axis turntable connected to the placement seat;

[0009] A camera for shooting the projection picture of the projector on the projection panel; and

[0010] An upper computer electrically connected to the camera and the first three-axis turntable; wherein the upper computer receives the shooting picture of the camera, when the camera is directly opposite the projection panel, and the edge of the shooting picture of the camera is consistent with the shape of the rectangular reference line, the upper computer sends a rotation angle to the first three-axis turntable according to the degree of skew of the projection picture in the shooting picture, and the first three-axis turntable drives the placement seat to rotate, so that the projection picture in the shooting picture is consistent with the shape of the reference line.

[0011] In a preferred scheme, the automatic alignment system of the projector further comprises a level and a second three-axis turntable, the level is fixed with the projection panel, and the second three-axis turntable is connected with the projection panel.

[0012] In a preferred embodiment, the automatic alignment system of the projector further comprises a first telescopic support for adjusting the height of the projection panel, and the first telescopic support is connected to the bottom of the second three-axis turntable.

[0013] In a preferred embodiment, the automatic alignment system of the projector further comprises a third three-axis turntable, and the third three-axis turntable is connected to the camera.

[0014] In a preferred embodiment, the automatic alignment system of the projector further comprises a second telescopic support for adjusting the height of the camera, and the second telescopic support is connected to the bottom of the third three-axis turntable.

[0015] In a preferred embodiment, the automatic alignment system of the projector further comprises a third telescopic support for adjusting the height of the placing seat, and the third telescopic support is connected to the bottom of the first three-axis turntable.

[0016] In a preferred embodiment, the automatic alignment system of the projector further comprises a slide rail and a slide block, the slide rail is connected to the bottom of the third telescopic support, and the slide block slides relative to the slide rail in a first direction, wherein when the edge of the shooting picture of the camera matches the shape of the rectangular reference mark, the normal of the projection surface of the projection panel is the first direction.

[0017] In a preferred embodiment, the bottom of the first telescopic support is fixed to one end of the slide rail, and the bottom of the second telescopic support is fixed to the other end of the slide rail.

[0018] In a preferred embodiment, the length of the second telescopic support is h1, the length of the first telescopic support is h2, and the length of the third telescopic support is h3, and when the edge of the shooting picture of the camera matches the shape of the rectangular reference mark, the following relationship is satisfied: h1>h2>h3.

[0019] In a preferred embodiment, the second three-axis turntable and the third three-axis turntable are electrically connected to the host computer.

[0020] The present application has the following beneficial effects:

[0021] In the scheme of the present application, the automatic alignment of the projector can be realized through the association and interaction between the first three-axis turntable, the host computer and the camera, without manual operation, and the subjective error caused by manual alignment during production can be eliminated, and the production efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The schematic diagram of the automatic alignment system of the projector according to an embodiment of the present application.

[0023] 10, projection panel; 11, rectangular reference mark; 12, level; 13, second three-axis turntable; 14, first telescopic support; 20, placing seat; 21, first three-axis turntable; 22, third telescopic support; 30, camera; 31, third three-axis turntable; 32, second telescopic support; 40, upper computer; 51, slide rail; 52, sliding block; 100, projector; F1, first direction; DETAILED DESCRIPTION

[0024] In order for those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0025] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or indirectly disposed on the other component; when a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component.

[0026] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or component referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0027] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple", "several" is two or more, unless otherwise explicitly specified.

[0028] It is to be understood that the structures, proportions, sizes, etc. shown in the drawings of the present disclosure are merely used to cooperate with the content disclosed in the present disclosure for understanding and reading by those skilled in the art, and are not used to limit the defined conditions of the present application, and therefore do not have technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effect and purpose that can be achieved by the present application, should still fall within the scope of the technology disclosed in the present application.

[0029] Please refer to Figure 1 The utility model discloses an automatic system of setting right of projector, automatic system of setting right of projector includes: projection panel 10, place seat 20, first three -axis turntable 21, camera 30 and host computer 40. Among them, the projection panel 10 is equipped with rectangular reference mark line 11, place seat 20 is used to place projector 100, first three -axis turntable 21 is connected with place seat 20, is used to drive place seat 20 to rotate, thereby adjusting the setting angle of projector 100 on place seat 20, camera 30 is used for shooting projector 100 on projection panel 10, host computer 40 is electrically connected with camera 30 and first three -axis turntable 21 respectively.

[0030] In the embodiment, when camera 30 is directly opposite projection panel 10, and the shape of the edge of the shooting picture of camera 30 is consistent with the shape of rectangular reference mark line 11, host computer 40 only needs to judge whether the edge shape of the projection picture is consistent with the shape of rectangular reference mark line 11, or only needs to judge whether the edge shape of the projection picture is consistent with the edge shape of the shooting picture of camera 30, whether projector 100 is set right can be judged. The range of the shooting picture of camera 30 should be greater than the range of rectangular reference mark line 11.

[0031] When projector 100 has not been set right, that is, the projection picture is not a square rectangle, host computer 40 converts the skew degree of the projection picture in the shooting picture into the rotation angle of three-dimensional space and sends to first three -axis turntable 21, after first three -axis turntable 21 completes adjustment according to the received rotation angle, host computer 40 informs camera 30 to take a snapshot, and host computer 40 judges whether the projection picture in the received shooting picture becomes a square rectangle, if yes, projector 100 has been set right, if not, the process of sending the rotation angle, rotating adjustment, taking a snapshot and judging is repeated until projector 100 is set right.

[0032] In the embodiment, through the association and interaction between first three -axis turntable 21, host computer 40 and camera 30, the automatic setting right of projector 100 is realized, manual operation is not needed, subjective error caused by manual setting right during production can be eliminated, and production efficiency is improved.

[0033] In one embodiment, the automatic alignment system of the projector further comprises a level 12 fixed to the projection panel 10 and a second three-axis turntable 13 connected to the projection panel 10. The three-axis turntable can be adjusted according to the data of the level 12 so that the projection panel is completely perpendicular to the ground, thus eliminating the angle deviation of the pitch and roll axes.

[0034] In one embodiment, the automatic alignment system of the projector further comprises a first telescopic support 14 connected to the bottom of the second three-axis turntable 13, which can adjust the height of the projection panel.

[0035] In one embodiment, the automatic alignment system of the projector further comprises a third three-axis turntable 31 connected to the camera 30. The camera 30 can be directed to the projection panel 10 by rotating the third three-axis turntable 31, so that the edge of the captured image is consistent with the shape of the rectangular reference mark 11.

[0036] In one embodiment, the automatic alignment system of the projector further comprises a second telescopic support 32 connected to the bottom of the third three-axis turntable 31, which can be used to adjust the height of the camera 30 so that the height of the camera 30 is level with the center of the rectangular reference mark 11 on the projection panel 10. Preferably, the center of the projection panel 10 coincides with the center of the rectangular reference mark 11.

[0037] In one embodiment, the automatic alignment system of the projector further comprises a third telescopic support 22 connected to the bottom of the first three-axis turntable 21, which can be used to adjust the height of the placement seat 20 so that the projection image of the projector 100 is aligned with the center of the projection panel 10.

[0038] In one embodiment, the automatic alignment system of the projector 100 further comprises a slide rail 51 connected to the bottom of the third telescopic support 22 and a slide block 52 sliding along a first direction F1 relative to the slide rail 51. The normal of the projection panel 10 is the first direction F1 when the edge of the captured image of the camera 30 is consistent with the shape of the rectangular reference mark 11. In this embodiment, the projector 100 can be adjusted to the appropriate projection position by sliding the first slide block 52 to move the projector 100 closer to or farther away from the projection panel 10, thus adapting to projectors of various projection distances.

[0039] Furthermore, the bottom of the first telescopic bracket 14 is fixed to one end of the slide rail 51, and the bottom of the second telescopic bracket 32 ​​is fixed to the other end of the slide rail 51. In this embodiment, the placement seat 20 and the projector 100 can slide and adjust their positions along the first direction F1. The projection tablet 10 and the camera 30 are respectively held at both ends of the slide rail 51, that is, the projection tablet 10, the projector 100, and the camera 30 are arranged in a straight line, which allows the projected image of the projector 100 and the captured image of the camera 30 to be conveniently facing the projection tablet 10.

[0040] In one embodiment, refer to Figure 1 Let the length of the second telescopic bracket 32 ​​be h1, the length of the first telescopic bracket 14 be h2, and the length of the third telescopic bracket 22 be h3. When the edge of the image captured by the camera 30 matches the shape of the rectangular reference line 11, the following relationship is satisfied: h1 > h2 > h3.

[0041] It is understandable that the first three-axis turntable 21, the second three-axis turntable 13, and the third three-axis turntable 31 are all three-axis turntables that can adjust the yaw axis, pitch axis, and roll axis. This technology is relatively mature and there are many models available, so we will not make any further restrictions here.

[0042] In one embodiment, both the second three-axis turntable 13 and the third three-axis turntable 31 are electrically connected to the host computer 40.

[0043] In one embodiment, the first telescopic bracket 14, the second telescopic bracket 32, and the third telescopic bracket 22 are all electrically powered, and the first telescopic bracket 14, the second telescopic bracket 32, and the third telescopic bracket 22 are all electrically connected to the host computer 40.

[0044] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An auto-levelling system for a projector, characterised in that, The projection panel is provided with a rectangular reference mark on the projection surface. The placing seat is used for placing the projector. The first three-axis turntable is connected with the placing seat. The camera is used for shooting the projection picture of the projector on the projection panel. The upper computer is electrically connected with the camera and the first three-axis turntable respectively. When the camera is opposite to the projection panel and the shape of the camera shooting picture edge is consistent with the shape of the rectangular reference mark, the upper computer sends the rotation angle to the first three-axis turntable according to the projection picture deflection degree in the shooting picture, and the first three-axis turntable drives the placing seat to rotate, so that the projection picture in the shooting picture is consistent with the shape of the reference mark. The automatic alignment system of the projector further comprises a level and a second three-axis turntable.

2. The auto-collimation system of a projector according to claim 1, wherein, The first telescopic support is connected to the bottom of the second three-axis turntable.

3. The auto-collimation system of a projector according to claim 2, wherein, The automatic alignment system of the projector further comprises a third three-axis turntable.

4. The auto-collimating system of claim 3, wherein, The second telescopic support is connected to the bottom of the third three-axis turntable.

5. The auto-collimating system of claim 4, wherein, The third telescopic support is connected to the bottom of the first three-axis turntable.

6. The auto-collimating system of claim 5, wherein, The automatic alignment system of the projector further comprises a slide rail and a slide block.

7. An auto-collimation system for a projector according to claim 6, wherein, The bottom of the first telescopic support is fixed to one end of the slide rail, and the bottom of the second telescopic support is fixed to the other end of the slide rail.

8. The auto-collimating system of a projector according to claim 7, wherein, The length of the second telescopic support is h1, the length of the first telescopic support is h2, and the length of the third telescopic support is h3.

9. The auto-collimating system of a projector according to claim 8, wherein, When the camera shooting picture edge is consistent with the shape of the rectangular reference mark, the relationship h1>h2>h3 is satisfied.

10. The auto-collimating system of claim 4, wherein, The second three-axis turntable and the third three-axis turntable are electrically connected with the upper computer.

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