Projection system and projection screen adjustment methods

Abstract

This invention provides a projection system, including a projection screen, two or more screen supports, and a projector. Each screen support includes a support member, a slider, and a drive controller. The slider is fixedly connected to the projection screen and movably connected to the support member. The drive controller drives the slider to move, generating a traction force on the projection screen. The projector uses a camera to capture a projected image formed when a screen adjustment feature pattern is projected onto the projection screen. Based on a comparison between the projected image and a reference value of the screen adjustment feature pattern, the projector generates adjustment parameters for two or more screen supports and sends them to the drive controller. The drive controller then determines whether the projection screen is flat and securely installed according to the adjustment parameters, and generates a traction force on the projection screen by moving the slider according to the adjustment parameters. This ensures the projection screen is flat and securely installed on the wall, achieving optimal projection effect and improving the user's viewing experience. This aspect also provides a projection screen adjustment method.

Description

Technical Field

[0001] This invention relates to the field of projection technology, specifically to a projection system and a method for adjusting a projection screen. Background Technology

[0002] Projectors are being used more and more widely in modern life, especially in education and home television. However, during the manual installation process, a lot of time is often spent adjusting the position of the projection screen to ensure that it is flat and fixed in order to achieve the best viewing effect.

[0003] Currently, projection screen adjustment can be achieved using an automatic adjustment screen bracket. However, existing automatic adjustment screen brackets rely on a light sensor located on the bracket body to detect the light emitted by the projector. A controller receives the sensing signal and, based on this signal, controls the movement of the screen mounting plate on a slide rail, thus slowly moving the screen along the rail until the light sensor signal disappears or a vibration sensor generates a vibration signal. This type of automatic adjustment screen bracket is highly dependent on the accuracy of the sensor and cannot automatically detect whether the screen surface is flat. Summary of the Invention

[0004] In view of this, the present invention provides a projection system and a projection screen adjustment method to improve the above-mentioned problems.

[0005] In a first aspect, embodiments of the present invention provide a projection system, including a projection screen, two or more screen supports, and a projector. Each screen support includes a support member, a slider, and a drive controller. The slider is fixedly connected to the projection screen and movably connected to the support member. The drive controller drives the slider to move to generate a traction force on the projection screen. The projector is used to capture a projected image formed when a screen adjustment feature pattern is projected onto the projection screen via a camera, and generates adjustment parameters for two or more screen supports based on a comparison between the projected image and a reference value of the screen adjustment feature pattern. These parameters are then sent to the drive controller, which in turn drives the slider to move according to the adjustment parameters to generate a traction force on the projection screen.

[0006] In some implementations, the drive controller is used to drive the slider to perform three-dimensional motion relative to the support.

[0007] In some implementations, two or more screen supports include a first support, a second support, a third support, and a fourth support, and the projection screen has four apex corners, with the first support, the second support, the third support, and the fourth support correspondingly connected to the four apex corners.

[0008] In some embodiments, the screen adjustment feature pattern includes multiple first stripes and multiple second stripes, the multiple first stripes are arranged in parallel at equal intervals, the multiple second stripes are arranged in parallel at equal intervals, and the multiple second stripes are perpendicular to the first stripes; the projected image includes multiple first projection stripes corresponding to the multiple first stripes and multiple second projection stripes corresponding to the multiple second stripes.

[0009] In some implementations, the size of the projected image is greater than or equal to the size of the projection screen.

[0010] Secondly, embodiments of the present invention provide a projection screen adjustment method suitable for adjusting a projection screen mounted on two or more screen supports. Each screen support includes a support member, a slider, and a drive controller. The slider is fixedly connected to the projection screen and movably connected to the support member. The drive controller drives the slider to move. The method includes: the drive controller receiving adjustment parameters from two or more screen supports; the adjustment parameters being generated by the projector based on a comparison of a projected image with a reference value of a screen adjustment feature pattern, wherein the projected image is an image formed when the screen adjustment feature pattern is projected onto the projection screen; and the drive controller driving the corresponding slider to move according to the adjustment parameters to generate a traction force on the projection screen.

[0011] In some implementations, the drive controller drives the corresponding slider to move according to the adjustment parameters to generate a traction force on the projection screen, including: the drive controller drives the slider to perform three-dimensional motion relative to the support member according to the adjustment parameters to generate a traction force on the projection screen.

[0012] In some implementations, the adjustment parameters include displacement parameters and bracket identifiers. The displacement parameters include the displacement value and direction of the slider displacement driven by the drive controller. The bracket identifiers include bracket address identifiers or bracket frequency band identifiers, which are used to identify the curtain bracket corresponding to the displacement parameters.

[0013] In some implementations, the drive controller drives the corresponding slider to move according to the adjustment parameters to generate a traction force on the projection screen, including: if the displacement parameter is less than or equal to the displacement adjustment threshold, stopping the drive of the corresponding slider to move; if the displacement parameter is greater than the displacement adjustment threshold, driving the corresponding slider to move according to the displacement parameter.

[0014] In some implementations, the drive controller drives the corresponding slider to move according to the displacement parameter to generate a traction force on the projection screen, including: if the displacement parameter is greater than or equal to a displaceable threshold, driving the corresponding slider to move according to the displaceable threshold; the displaceable threshold is the displacement value of the slider relative to the support; if the displacement parameter is less than the displaceable threshold, driving the corresponding slider to move according to the displacement parameter.

[0015] In the projection system and projection screen adjustment method provided in this invention, the projection screen is connected to sliders of two or more screen supports. The projector captures the projected image formed when the screen adjustment feature pattern is projected onto the projection screen via a camera, and generates adjustment parameters for two or more screen supports by comparing the projected image with reference values ​​of the screen adjustment feature pattern. These parameters are then sent to the corresponding drive controllers of the screen supports. The drive controllers determine whether the projection screen is properly installed based on the received adjustment parameters, and drive the sliders to move according to the parameters to generate traction force on the projection screen. This ensures the projection screen is flatly and securely installed on the wall, achieving optimal projection effect and improving the user's viewing experience. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the projection system provided in an embodiment of the present invention.

[0018] Figure 2 for Figure 1 A schematic diagram of the screen support structure for the projection system shown.

[0019] Figure 3 for Figure 1 The diagram shows the structural modules of the projector in the projection system.

[0020] Figure 4 for Figure 1 A schematic diagram of the screen adjustment feature pattern of the projection system shown.

[0021] Figure 5 for Figure 1 The diagram shows the projection image of the projection system in its first projection state.

[0022] Figure 6 for Figure 1 The diagram shows the projection image of the projection system in the second projection state.

[0023] Figure 7 for Figure 1 The diagram shows the projection image of the projection system in the third projection state.

[0024] Figure 8 for Figure 1 The diagram shows the projection image of the projection system in the fourth projection state.

[0025] Figure 9 This is a flowchart illustrating the curtain adjustment method provided in an embodiment of the present invention.

[0026] Figure 10 This is a flowchart illustrating another curtain adjustment method provided in an embodiment of the present invention.

[0027] Figure 11 This is a flowchart illustrating another curtain adjustment method provided in an embodiment of the present invention. Detailed Implementation

[0028] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0029] If certain terms are used in the specification and claims to refer to specific components, those skilled in the art will understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not distinguish components based on differences in name, but rather on differences in function.

[0030] Please see Figure 1 This invention provides a projection system 10, which includes a projection screen 100, two or more screen supports 200, and a projector 300. The projection screen 100 is fixedly installed by two or more screen supports 200, for example, two or more screen supports 200 are fixedly installed on a mounting wall 400 and connected to the projection screen 100 so that the projector 300 can project onto the projection screen 100, thereby meeting the user's viewing needs.

[0031] In this embodiment, the projection screen 100 is a screen used in conjunction with the projector 300 to display images. It can be foldable, and can be folded or rolled up for storage when not in use, reducing the floor space occupied by the projection screen 100. Furthermore, the projection screen 100 can be a square screen with four apex corners 101.

[0032] In practical use, the best viewing effect is achieved when the projection screen 100 is flatly fixed to the mounting wall 400. It should be noted that "flatly fixed to the mounting wall 400" means that the projection screen 100 is fully unfolded on the mounting wall 400, and the plane of the projection screen 100 is parallel to the mounting wall 400. In other embodiments, the projection screen 100 can also be a screen of other shapes.

[0033] In this embodiment, two or more screen supports 200 may be, for example, four screen supports, including a first support 201, a second support 203, a third support 205, and a fourth support 207. The first support 201, second support 203, third support 205, and fourth support 207 are connected to the four apex 101 in a clockwise direction. Specifically, the first support 201 and third support 205 are diagonally positioned, as are the second support 203 and fourth support 207. In other embodiments, the two or more screen supports 200 may be, for example, two screen supports 200, which may be arranged opposite each other and connected to opposite sides of the projection screen 100.

[0034] Please see Figure 2 Each of two or more screen supports 200 includes a support member 210, a slider 230, and a drive controller 250. The support member 210 is used to connect to the mounting wall 400 so that the screen support 200 is fixedly connected to the mounting wall 400. The slider 230 is movably connected to the support member 210 and can perform three-dimensional movement relative to the support member 210 under the control of the drive controller 250. The slider 230 is fixedly connected to the projection screen 100 and generates a traction force on the projection screen 100 when the drive controller 250 drives the slider 230 to move.

[0035] In one implementation, the slider 230 can be connected to the support member 210 through a slide rail, traction rope, connecting arm and other structures. Under the control of the drive controller 250, the slide rail, traction rope, connecting arm and other structures can pull the slider 230 in different directions, so that the slider 230 can move in three dimensions relative to the support member 210.

[0036] Please refer to it again. Figure 2 The drive controller 250 may include a communication module 251 and a motor control module 253. The communication module 251 is used to communicate with the projector 300 and receive adjustment parameters sent by the projector 300. The communication module 251 may be a wireless communication module, such as a WIFI communication module or a Bluetooth communication module. The motor control module 253 is used to control the three-dimensional motion of the slider according to the adjustment parameters received by the communication module 251. For example, the drive controller 250 may also include a microcontroller, a drive circuit, and three drive motors. The motor control module 253 controls the three drive motors to work according to the adjustment parameters to drive the slider 230 to move in three directions. The three directions may be three orthogonal directions in space, such as the XYZ direction in the XYZ coordinate system, so that the slider 230 moves in three dimensions relative to the support member 210.

[0037] In this embodiment, the sliders 230 corresponding to the first bracket 201, the second bracket 203, the third bracket 205 and the fourth bracket 207 can perform three-dimensional motion under the drive of their respective drive controllers 250, and the directions of motion can be different, thereby realizing the traction force on the projection screen 100 in different directions to adjust the projection screen 100 to be flat.

[0038] Please see Figure 3 The projector 300 may include a projector host 310, a camera 330, and an image processing module 350. The projector host 310 projects a screen adjustment feature pattern 301, the camera 330 captures a projected image 303 generated when the screen adjustment feature pattern 301 is projected onto the projection screen 100, and the image processing module 350 generates two or more adjustment parameters for the screen support 200 by comparing the projected image 303 with a reference value of the screen adjustment feature pattern 301. The projector 300 may also include a communication module 370. In this embodiment, the communication module 370 may be a wireless communication module, such as a WIFI communication module or a Bluetooth communication module. The communication module 370 is used to communicate with the communication module 251 of the screen support 200 to send the adjustment parameters to the screen support 200, thereby driving the controller 250 to drive the slider 230 according to the adjustment parameters to generate a traction force on the projection screen 100.

[0039] The projector host 310 may include electronic and optical components of the projector 300 that enable projection, such as a projection lens, memory, circuit board, and power supply. In this embodiment, the projector host 310 is used to implement the projector function. The projection screen adjustment feature pattern 301 is stored in the projector host 310 and projected onto the projection screen 100 via the projector host 310 to form a projected image 303 (e.g., Figure 1 (As shown).

[0040] Please see Figure 4 The screen adjustment feature pattern 301 is a pattern used to calibrate whether the projection screen is flat. The screen adjustment feature pattern 301 includes multiple first stripes 3011 and multiple second stripes 3013. The multiple first stripes 3011 are arranged in parallel at equal intervals, and the multiple second stripes 3013 are arranged in parallel at equal intervals, and the multiple second stripes 3013 are perpendicular to the first stripes 3011.

[0041] Camera 330 is installed in the projector host 310 and is used to capture the projected image 303 generated when the screen adjustment feature pattern 301 is projected onto the projection screen 100. When the screen adjustment feature pattern 301 is... Figure 4 When the pattern is shown, correspondingly, such as Figure 1As shown, the projected image 303 includes multiple first projection stripes 3031 corresponding to multiple first stripes 3011 and multiple second projection stripes 3033 corresponding to multiple second stripes 3013. The size of the projected image 303 can be greater than or equal to the size of the projection screen 100 so that the projected image 303 can completely cover the projection screen 100, thereby facilitating the comparison of the projected image 303 and the screen adjustment feature pattern 301.

[0042] The camera 330 enables the projector 300 to simultaneously perform projection and image acquisition functions. The camera 330 can be a separate component from the projection lens. In some embodiments, the camera 330 may also share a lens assembly with the projection lens.

[0043] The image processing module 350 is connected to the camera 330 and the projector 310, and is used to generate two or more adjustment parameters for the screen support 200 by comparing the projected image 303 with the reference value of the screen adjustment feature pattern 301.

[0044] In this embodiment, the reference values ​​for the projected image 303 and the screen adjustment feature pattern 301 may include at least one of the following: a reference value for the flatness of the first projected stripe 3031 relative to the first stripe 3011; a reference value for the flatness of the second projected stripe 3033 relative to the second stripe 3013; a reference value for the spacing between multiple first projected stripes 3031; a reference value for the spacing between multiple second projected stripes 3033; and a reference value for the spacing between multiple second projected stripes 3033. The reference values ​​for the projected image 303 and the screen adjustment feature pattern 301 are used to calculate the adjustment parameters of two or more screen supports 200 when the projected image 303 is adjusted to coincide with the screen adjustment feature pattern 301. In this embodiment, the adjustment parameters of the screen support 200 are, for example, the displacement direction and displacement value of the slider 230 relative to the support member 210 requiring three-dimensional movement.

[0045] Taking the slider's three-dimensional motion in the XYZ coordinate system as an example, such as Figure 3 As shown, the extension direction of the first stripe 3011 is taken as the X direction, the extension direction of the second stripe 3013 is taken as the Y direction, and the direction perpendicular to the first stripe 3011 and the second stripe 3013 is taken as the Z direction. Thus, a spatial coordinate system orthogonal to the X, Y and Z axes can be established on the projection screen 100.

[0046] Figures 5-8 In the diagram, solid lines represent the screen adjustment feature pattern 301, and dashed lines represent the projected image 303. Specifically, the solid lines extending along the X direction are the first stripe 3011, and the dashed lines are the first projected stripe 3031. The solid lines extending along the Y direction are the second stripe 3013, and the dashed lines are the second projected stripe 3033.

[0047] Please see Figure 5 If the projected image 303 is in the first projection state: the first projection stripe 3031 is uneven in the X direction, that is, the first projection stripe 3031 is deformed and offset relative to the first stripe 3011 in the Y direction. Based on the reference value of the flatness of the first projection stripe 3031 relative to the first stripe 3011, the displacement value of the slider 230 of the screen bracket 200 along the Y direction can be calculated, so that the slider 230 moves along the Y direction under the drive of the drive controller 250 and provides the projection screen 100 with traction force in the Y direction.

[0048] Please see Figure 6 If the projected image 303 is in the second projection state: the second projection stripe 3033 is uneven in the Y direction, that is, the second projection stripe 3033 is deformed and offset relative to the second stripe 3013 in the X direction. Based on the reference value of the flatness of the second projection stripe 3033 relative to the second stripe 3013, the displacement value of the slider 230 of the screen bracket 200 along the X direction can be calculated, so that the slider 230 moves along the Y direction under the drive of the drive controller 250 and provides the projection screen 100 with traction force in the X direction.

[0049] Please see Figure 7 If the projected image 303 is in the third projection state: the spacing of the first projection stripes 3031 decreases sequentially along the Y direction, that is, the plane where the projection screen 100 is located is tilted relative to the preset projection plane, creating an angle. Based on the reference values ​​of the spacing of the multiple first projection stripes 3031 and the spacing of the multiple first stripes 3011, the displacement value of the slider 230 of the screen support 200 along the Z direction can be calculated, so that the slider 230 moves along the Z direction under the drive of the drive controller 250, and provides the projection screen 100 with traction force in the Z direction.

[0050] Please see Figure 8 If the projected image 303 is in the fourth projection state: the spacing of the second projection stripes 3033 decreases sequentially along the X direction, that is, the plane where the projection screen 100 is located is tilted relative to the preset projection plane, creating an angle. Based on the reference values ​​of the spacing of the multiple second projection stripes 3033 and the spacing of the multiple second stripes 3013, the displacement value of the slider 230 of the screen support 200 along the Z direction can be calculated, so that the slider 230 moves along the Z direction under the drive of the drive controller 250, and provides the projection screen 100 with traction force in the Z direction.

[0051] In some embodiments, the projected image 303 may be in a mixture of one or more of a first projection state, a second projection state, a third projection state, and a fourth projection state. The adjustment parameters may be labeled as the displacement direction and displacement value in the XYZ directions, wherein the displacement direction and displacement value can be calculated from the reference values ​​of the projected image 303 and the screen adjustment feature pattern 301. The drive controller 250 controls the slider 230 to move along the displacement direction and displacement value in the adjustment parameters according to the adjustment parameters, thereby generating a traction force on the projection screen 100 to make the projection screen 100 flat.

[0052] Furthermore, the displacement direction and displacement amount in the adjustment parameters can be represented as (x, y, z). For example, adjusting the parameters (0, 1, -1) means no movement in the X direction, movement of 1 movement unit in the Y direction, and movement of 1 movement unit in the -Z direction. The displacement direction is indicated by a positive or negative sign, with a positive sign indicating positive movement in the XYZ direction and a negative sign indicating negative movement in the XYZ direction. The displacement amount is represented by a numerical value, and the unit of displacement is the movement unit. The movement unit is used to characterize the magnitude of the displacement, and it can be a user-defined length, such as 0.5 cm, 1 cm, etc.

[0053] In one implementation, the displacement unit in the adjustment parameters can be converted into a control signal for the drive controller 250 to drive the slider 230. This conversion relationship can be freely set within a suitable range. If the control time is set to a constant value, then only the relationship between acceleration and the displacement unit needs to be set to obtain the displacement. The relationship between acceleration and the displacement unit can be a = kn, where k is a constant coefficient used to control the length of the displacement unit. Furthermore, the displacement can be calculated using the constant control time and acceleration, thus allowing the drive controller 250 to drive the slider 230 to adjust the displacement in the adjustment parameters.

[0054] Furthermore, if the drive controller 250 includes three drive motors that drive the slider 230 to move in three directions, the displacement direction in the adjustment parameters can be converted into an electrical signal sent by the drive controller 250 to the drive motors. This electrical signal controls the drive motors that drive the slider 230 to move along the displacement direction, causing the slider 230 to move by a certain amount. For example, adjusting the parameters (1,0,0) causes the drive controller 250's electrical signal to activate the drive motors that drive the slider 230 to move along the X direction, driving the slider 230 to move one unit along the X direction.

[0055] In addition, the adjustment parameters may also include a bracket address identifier or a bracket frequency band identifier. The bracket address identifier or bracket frequency band identifier can be used to identify the screen bracket 200 corresponding to the adjustment parameters, so that the adjustment parameters of the slider 230 of the corresponding screen bracket 200 are sent to the corresponding drive controller 250, thereby driving and controlling the slider 230 of the screen bracket 200. In this embodiment, the first bracket 201, the second bracket 203, the third bracket 205, and the fourth bracket 207 can correspond to address identifiers A1, A2, A3, and A4, respectively. The adjustment parameter (A2, x, y, z) represents the adjustment parameter corresponding to the second bracket 203, and so on. If a bracket frequency band identifier is used, the communication modules 251 of the first bracket 201, the second bracket 203, the third bracket 205, and the fourth bracket 207 can each be set to four different transmission frequency bands to communicate with the communication module 370 of the projector 300.

[0056] Please see Figure 8 This invention provides a projection screen adjustment method suitable for the screen bracket 200 of the projection system 10 described above, and executed by the drive controller 250 of the screen bracket 200. The projection screen adjustment method may include steps S101 to S103.

[0057] Step S101: The drive controller receives adjustment parameters from two or more curtain supports.

[0058] In this embodiment, the adjustment parameters are generated by the projector by comparing the reference values ​​of the projected image 303 and the screen adjustment feature pattern 301. The projected image 303 is the image formed when the screen adjustment feature pattern 301 is projected onto the projection screen 100. The process of generating the adjustment parameters can be referred to the foregoing and will not be repeated here.

[0059] The adjustment parameters include displacement parameters and support identifiers. Based on the support identifier, each drive controller 250 can obtain the corresponding adjustment parameters; based on the displacement parameters, each drive controller 250 can drive the corresponding slider 23 to move with the corresponding displacement value and direction. Taking the support identifier as the support address identifier, and taking three-dimensional motion in the XYZ spatial coordinate system as an example, the adjustment parameters can be, for example, (A1,1,0,0), (A2,1,0,0), (A3,0,0,1) and (A4,0,-1,0).

[0060] Step S103: The drive controller drives the corresponding slider to move according to the adjusted parameters to generate a traction force on the projection screen.

[0061] As mentioned above, taking the adjustment parameters (A1,1,0,0), (A2,1,0,0), (A3,0,0,1), and (A4,0,-1,0) as examples, the adjustment parameter received by the drive controller 250 of the first bracket 201 is (A1,1,0,0), and the displacement parameter is 1,0,0. Therefore, the drive controller 250 drives the slider 230 of the first bracket 201 to move one unit relative to the support member 210 in the X direction, without moving in the Y and Z directions. The adjustment parameter received by the drive controller 250 of the second bracket 203 is (A2,1,0,0), and the displacement parameter is 1,0,0. Therefore, the drive controller 250 drives the slider 230 of the second bracket 203 to move one unit relative to the support member 210 in the X direction. The support member 210 is displaced by one moving unit, but does not move in the Y and Z directions; the adjustment parameter received by the drive controller 250 of the third support 205 is (A3,0,0,1), and the displacement parameter is 0,0,1. Therefore, the drive controller 250 drives the slider 230 of the third support 205 to move one moving unit relative to the support member 210 in the Z direction, but does not move in the X and Y directions; the adjustment parameter received by the drive controller 250 of the fourth support 207 is (A4,0,-1,0), and the displacement parameter is 0,-1,0. Therefore, the drive controller 250 drives the slider 230 of the fourth support 207 to move one moving unit relative to the support member 210 in the opposite direction of the Y direction, but does not move in the X and Z directions. Thus, the drive controllers 250 of the first bracket 201, the second bracket 203, the third bracket 205, and the fourth bracket 207 respectively drive the corresponding sliders 230 to perform three-dimensional movement relative to the support member 210 according to their respective received adjustment parameters. During the three-dimensional movement, a traction force is generated on the projection screen 100, thereby adjusting the projection screen 100 to a flat position and improving the projection viewing effect. Further, after the drive controller 250 drives the corresponding sliders 230 to move according to the adjustment parameters, it generates a feedback signal. This feedback signal is used to indicate that the drive controller 250 has adjusted the screen bracket 200 according to the adjustment parameters. In some embodiments, the projector 300 will generate new adjustment parameters again, and the drive controller 250 will re-execute steps S101 to S103 until the projection screen 100 is fixedly installed and flat.

[0062] In the projection system 10 and projection screen adjustment method provided in this embodiment of the invention, the drive controller 250, which is set on the screen bracket 200, can determine whether the projection screen 100 is fixedly installed flat based on the adjustment parameters received from two or more screen brackets 200, and drive the slider 230 to move according to the adjustment parameters to generate a traction force on the projection screen 100, so that the projection screen 100 can be fixed flat on the mounting wall 400, achieving the best projection effect and improving the user's viewing experience.

[0063] Please see Figure 10 This invention provides another projection screen adjustment method, suitable for the screen bracket 200 of the projection system 10 described above, and executed by the drive controller 250 of the screen bracket 200. Specifically, the projection screen adjustment method may include steps S201 to S205.

[0064] Step S201: The drive controller receives adjustment parameters from two or more curtain supports.

[0065] In this embodiment, the method for obtaining the adjustment parameters in step S201 is the same as that in step S101, and will not be described again here.

[0066] Step S203: If the displacement parameter is less than or equal to the displacement adjustment threshold, stop driving the corresponding slider to move.

[0067] The displacement adjustment threshold can be the minimum displacement value that the drive controller 250 can drive the slider 230 of the screen bracket 200 to move relative to the support member 210; it is a preset parameter value. In a certain displacement direction, if the displacement value of the displacement parameter is less than or equal to the displacement adjustment threshold, it can be determined that the projection screen 100 is roughly flat and fixed in this displacement direction. There is no need to control the slider 230 of the screen bracket 200 to move relative to the support member 210 along this displacement direction to pull the projection screen 100; at this time, the drive of the corresponding slider 230 to move along this direction is stopped. By comparing the displacement value of the displacement parameter with the displacement adjustment threshold, it can be determined whether the adjustment of the screen bracket 200 is complete. When the displacement values ​​in all directions are less than the displacement adjustment threshold, the adjustment of the screen bracket 200 can be considered complete.

[0068] Taking the first support 201 receiving the adjustment parameter (0.01,0,0) as an example, the displacement adjustment threshold can be 0.02 moving units. At this time, the adjustment displacement value of the slider 230 of the first support 201 in the X direction is 0.01 moving units, which is less than the displacement adjustment threshold. The drive controller 250 of the first support 201 will not drive the slider 230 to move in the X direction. That is to say, the drive controller 250 will stop driving the slider 230 to move in the X direction.

[0069] Step S205: If the displacement parameter is greater than the displacement adjustment threshold, drive the corresponding slider to move according to the displacement parameter.

[0070] Conversely, in a certain displacement direction, if the displacement value of the displacement parameter is greater than the displacement adjustment threshold, the drive controller 250 can drive the corresponding slider 230 to move relative to the support member 210 by a corresponding displacement value in this displacement direction according to the displacement parameter. Taking the adjustment parameter (-1, 0.2, 0) received by the first support 201 as an example, the displacement adjustment threshold can be 0.02 movement units. At this time, the adjustment displacement value of the slider 230 of the first support 201 in the X direction is 1 movement unit, which is greater than the displacement adjustment threshold. The drive controller 250 of the first support 201 drives the slider 230 to move 1 movement unit in the negative X direction. The adjustment displacement value of the slider 230 of the first support 201 in the Y direction is 0.2 movement units, which is greater than the displacement adjustment threshold. The drive controller 250 of the first support 201 drives the slider 230 to move 1 movement unit in the positive Y direction.

[0071] In the projection screen adjustment method provided in this embodiment of the invention, the drive controller 250, located on the screen bracket 200, can determine whether the projection screen 100 is properly installed based on the adjustment parameters received from two or more screen brackets 200. It then drives the slider 230 to move according to the adjustment parameters to generate a traction force on the projection screen 100, thereby ensuring the projection screen 100 is flatly fixed to the mounting wall 400, achieving optimal projection effect and improving the user's viewing experience. Simultaneously, driving the corresponding slider 230 based on the comparison between displacement parameters and displacement adjustment thresholds helps determine the completion status of the screen bracket 200 adjustment and allows for timely termination of the adjustment process.

[0072] Please see Figure 11 This invention provides another method for adjusting a projection screen, suitable for the screen support 200 of the projection system 10 described above, and executed by the drive controller 250 of the screen support 200. Specifically, the projection screen adjustment method may include steps S301 to S305.

[0073] Step S301: The drive controller receives adjustment parameters from two or more curtain supports.

[0074] In this embodiment, the method for obtaining the adjustment parameters in step S301 is the same as that in step S101, and will not be described again here.

[0075] Step S303: If the displacement parameter is greater than or equal to the displacement threshold, drive the corresponding slider to move according to the displacement threshold.

[0076] The displacement threshold is the maximum displacement value that the slider 230 can make relative to the support member 210. Since the slider 230 generates a traction force on the projection screen 100 when it moves relative to the support member 210, and the size of the projection screen 100 is a fixed value, the displacement value of the slider 230 relative to the support member 210 is limited to prevent damage to the projection screen 100 due to excessive displacement of the slider 230 relative to the support member 210.

[0077] If the displacement parameter is greater than or equal to the displacement threshold, driving the corresponding slider 230 to move according to the displacement parameter may damage the projection screen 100. Therefore, the corresponding slider 230 is driven to move according to the displacement threshold.

[0078] Taking the first support 201 receiving the adjustment parameter (20,0,0) as an example, the displacement threshold can be 10 movement units. In this case, the adjustment displacement value of the slider 230 of the first support 201 in the X direction is 20 movement units, which is greater than the displacement threshold. The drive controller 250 of the first support 201 then drives the slider 230 to move 10 movement units in the positive X direction. It can be understood that when the displacement parameter is greater than the displacement threshold, the displacement direction of the slider of the corresponding adjusted curtain support 200 should be the displacement direction in the displacement parameter, and the displacement value should be the displacement threshold.

[0079] Step S305: If the displacement parameter is less than the displacement threshold, drive the corresponding slider to move according to the displacement parameter.

[0080] When the displacement parameter is less than the displacement threshold, the movement of the slider 230 relative to the support 210 will not damage the projection screen 100. The corresponding slider 230 can be driven to move according to the displacement parameter so that the corresponding slider 230 is in the corresponding position, thereby achieving the traction of the projection screen 100.

[0081] Taking the first support 201 receiving the adjustment parameter (8,0,0) as an example, the displacement threshold can be 10 movement units. In this case, the adjustment displacement value of the slider 230 of the first support 201 in the X direction is 8 movement units, which is less than the displacement threshold. The drive controller 250 of the first support 201 drives the slider 230 to move 8 movement units in the positive X direction. It can be understood that when the displacement parameter is less than or equal to the displacement threshold, the displacement direction of the slider of the corresponding curtain support 200 needs to be the displacement direction in the displacement parameter, and the displacement value is the displacement value in the displacement parameter.

[0082] In the projection screen adjustment method provided in this embodiment of the invention, the drive controller 250, located on the screen bracket 200, can determine whether the projection screen 100 is properly installed based on the adjustment parameters received from two or more screen brackets 200. It then drives the slider 230 to move according to the adjustment parameters, generating a traction force on the projection screen 100. This ensures the projection screen 100 is flatly fixed to the mounting wall 400, achieving optimal projection effect and improving the user's viewing experience. Simultaneously, driving the corresponding slider 230 based on a comparison of displacement parameters and a displacement threshold helps determine the displacement range of the slider 230 relative to the support member 210, preventing damage to the projection screen 100 due to excessive traction.

[0083] In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "installation," "connection," "fixation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components; they can refer to mere surface contact or a surface contact connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention according to the specific circumstances.

[0084] In the description of this specification, references to terms such as "one embodiment," "some implementations," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

Claims

1. A projection system, characterized in that, include: Projection screen; Two or more screen supports, each screen support including a support member, a slider and a drive controller, the slider being fixedly connected to the projection screen and movably connected to the support member, the drive controller driving the slider to move to generate a traction force on the projection screen; as well as A projector is used to capture a projected image formed when a screen adjustment feature pattern is projected onto the projection screen via a camera, and to generate adjustment parameters for two or more screen supports based on a comparison between the projected image and a reference value of the screen adjustment feature pattern. These parameters are then sent to the drive controller, which in turn drives the slider to move according to the adjustment parameters, thereby generating a traction force on the projection screen.

2. The projection system as described in claim 1, characterized in that, The drive controller is used to drive the slider to perform three-dimensional motion relative to the support.

3. The projection system as described in claim 2, characterized in that, The two or more screen supports include a first support, a second support, a third support, and a fourth support. The projection screen has four apex corners, and the first support, the second support, the third support, and the fourth support are correspondingly connected to the four apex corners.

4. The projection system as described in claim 1, characterized in that, The screen adjustment feature pattern includes multiple first stripes and multiple second stripes. The multiple first stripes are arranged in parallel at equal intervals, and the multiple second stripes are arranged in parallel at equal intervals, with the multiple second stripes perpendicular to the first stripes. The projected image includes multiple first projection stripes corresponding to the multiple first stripes and multiple second projection stripes corresponding to the multiple second stripes.

5. The projection system as described in claim 1, characterized in that, The size of the projected image is greater than or equal to the size of the projection screen.

6. A method for adjusting a projection screen, characterized in that, A method for adjusting a projection screen mounted on two or more screen supports, each screen support including a support member, a slider, and a drive controller, wherein the slider is fixedly connected to the projection screen and movably connected to the support member, and the drive controller drives the slider to move, the method comprising: The drive controller receives adjustment parameters from two or more screen supports; the adjustment parameters are generated by the projector based on a comparison of the projected image and a reference value of the screen adjustment feature pattern, the projected image being the image formed when the screen adjustment feature pattern is projected onto the projection screen; and The drive controller drives the corresponding slider to move according to the adjustment parameters to generate a traction force on the projection screen.

7. The projection screen adjustment method as described in claim 6, characterized in that, The drive controller drives the corresponding slider to move according to the adjustment parameters to generate a traction force on the projection screen, including: The drive controller drives the slider to perform three-dimensional motion relative to the support member according to the adjustment parameters to generate a traction force on the projection screen.

8. The projection screen adjustment method as described in claim 6, characterized in that, The adjustment parameters include displacement parameters and bracket identifiers. The displacement parameters include the displacement value and displacement direction of the slider driven by the drive controller. The bracket identifier includes a bracket address identifier or a bracket frequency band identifier, and the bracket identifier is used to identify the curtain bracket corresponding to the displacement parameters.

9. The projection screen adjustment method as described in claim 8, characterized in that, The drive controller drives the corresponding slider to move according to the adjustment parameters to generate a traction force on the projection screen, including: If the displacement parameter is less than or equal to the displacement adjustment threshold, stop driving the corresponding slider to move; If the displacement parameter is greater than the displacement adjustment threshold, the corresponding slider is driven to move according to the displacement parameter.

10. The projection screen adjustment method as described in claim 8, characterized in that, The drive controller drives the corresponding slider to move according to the displacement parameters to generate a traction force on the projection screen, including: If the displacement parameter is greater than or equal to the displacement threshold, the corresponding slider is driven to move according to the displacement threshold; the displacement threshold is the displacement value of the slider relative to the support member; If the displacement parameter is less than the displacement threshold, the corresponding slider is driven to move according to the displacement parameter.

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