Projection lens shift method, device and system

Abstract

The present application provides a projection lens shift method, device and system, and relates to the field of projection lens shift control technology. The present application detects the current moving position of the target projection lens on the lead screw through a moving position detection component, and the target driving parameters generated by the driving motor based on the current moving position of the target projection lens and the target shift position drive the target projection lens on the lead screw from the current moving position to the target shift position corresponding to the projection image being clear, thereby completing the lens shift operation timely and accurately based on the real shift status of the projection lens detected in real time, so as to improve the shift accuracy and efficiency of the projection lens while ensuring the shift effect of the projection lens, and improve the user experience.

Description

Technical Field

[0001] The present application relates to the technical field of projection lens shift control, and in particular to a projection lens shift method, device and system. Background Art

[0002] With the continuous development of projection technology, the application scenarios of projection equipment are becoming more and more extensive, and people have put forward more requirements on the projection process of projection equipment, among which the projection lens shift requirement is an important component. In response to the proposed projection lens shift requirement, it is usually necessary to adjust the lens position of the projection lens of the projection equipment to make the projection image of the projection equipment clear to meet the projection lens shift requirement. In this process, how to timely and accurately adjust the lens position of the projection lens to achieve a clear projection image shift effect is an important issue in the actual application of projection technology. Summary of the invention

[0003] In view of this, the purpose of the present application is to provide a projection lens shift method, device and system, which can detect the actual shift status of the projection lens in real time, and promptly and accurately drive the projection lens to move to the target shift position when the projection image is clear, thereby ensuring the shift effect of the projection lens while improving the shift accuracy and shift efficiency of the projection lens, thereby improving the user experience.

[0004] In order to achieve the above purpose, the technical solution adopted in the embodiment of the present application is as follows:

[0005] In a first aspect, the present application provides a projection lens shift method, which is applied to a projection lens shift system, wherein the shift system includes a drive motor, a moving position detection component and a lead screw, and the drive motor is used to drive a target projection lens to move on the lead screw. The shift method includes:

[0006] The moving position detection component detects the current moving position of the target projection lens on the lead screw;

[0007] The drive motor acquires a target drive parameter, wherein the target drive parameter is generated based on the current moving position and a target axis shift position, and the target axis shift position is a moving position of the target projection lens on the lead screw when a projection image is clear;

[0008] The driving motor drives the target projection lens to move to the target shift position on the lead screw according to the target driving parameter.

[0009] In an optional embodiment, the projection lens shift system further includes a control unit, the moving position detection component and the drive motor are electrically connected to the control unit respectively, and the shift method further includes:

[0010] The control unit acquires the current moving position detected by the moving position detection component;

[0011] The control unit generates a target driving parameter for the driving motor according to the current moving position and the target axis shift position.

[0012] In an optional embodiment, the moving position detection component includes a constant voltage source, a sliding rheostat and a moving detection circuit, two rectifier connection ends of the sliding rheostat are electrically connected to the constant voltage source, the relative position between the rheostat slider of the sliding rheostat and the target projection lens is fixed, the rectifier connection end of the sliding rheostat flush with the shift axis origin position is electrically connected to the first input end of the moving detection circuit, and the rheostat slider of the sliding rheostat is electrically connected to the second input end of the moving detection circuit, so as to characterize the displacement of the current moving position relative to the shift axis origin through the output voltage signal of the moving detection circuit.

[0013] In an optional embodiment, the target driving parameter includes the axis shift rotation direction and the axis shift compensation angle value of the driving motor, the motor rotor of the driving motor is equipped with a first transmission gear, and the screw rod is equipped with a second transmission gear, wherein the first transmission gear and the second transmission gear are meshed with each other, and the step of generating the target driving parameter includes:

[0014] Calculating the displacement difference between the target shift position and the current shift position relative to the shift origin, and obtaining the shift compensation displacement for the target projection lens;

[0015] When the axis shift compensation displacement is not zero, determining the axis shift rotation direction of the driving motor according to the positive and negative properties of the axis shift compensation displacement;

[0016] The axis shift compensation angle value of the driving motor is calculated according to the absolute value of the axis shift compensation displacement, the pitch of the lead screw, the gear radius of the second transmission gear, and the gear radius of the first transmission gear.

[0017] In an optional embodiment, the step of determining the axis shift rotation direction of the driving motor according to the positive and negative property conditions of the axis shift compensation displacement comprises:

[0018] If the positive and negative attribute status indicates that the offset compensation displacement is a positive number, the positive rotation direction of the drive motor is used as the offset rotation direction of the drive motor;

[0019] If the positive and negative attribute status indicates that the offset compensation displacement is a negative number, the opposite rotation direction of the driving motor is used as the offset rotation direction of the driving motor.

[0020] In a second aspect, the present application provides a projection lens shift method, which is applied to a control unit included in a projection lens shift system, wherein the shift system further includes a drive motor, a moving position detection component and a lead screw, wherein the moving position detection component and the drive motor are electrically connected to the control unit respectively, and the drive motor is used to drive a target projection lens to move on the lead screw, and the shift method includes:

[0021] Acquire the current moving position of the target projection lens on the lead screw detected by the moving position detection component;

[0022] generating a target driving parameter for the driving motor according to the current moving position and the target axis shift position, wherein the target axis shift position is the moving position of the target projection lens on the lead screw when the projection image is clear;

[0023] The driving motor is controlled to drive the target projection lens to move to the target axis shift position on the lead screw according to the target driving parameter.

[0024] In an optional embodiment, the mobile position detection component includes a constant voltage source, a sliding rheostat and a mobile detection circuit, two rectifier connection ends of the sliding rheostat are electrically connected to the constant voltage source, the relative position between the rheostat slider of the sliding rheostat and the target projection lens is fixed, the rectifier connection end of the sliding rheostat flush with the axis shift origin position is electrically connected to the first input end of the mobile detection circuit, and the rheostat slider of the sliding rheostat is electrically connected to the second input end of the mobile detection circuit, then the step of obtaining the current mobile position of the target projection lens detected by the mobile position detection component includes:

[0025] receiving an output voltage signal transmitted by the mobile position detection component through a mobile detection circuit;

[0026] Calculating the axis shift resistance component value of the sliding rheostat connected in parallel with the movement detection circuit according to the voltage value of the output voltage signal, the pre-stored voltage value of the constant voltage source, the rectification length of the sliding rheostat, the rectification resistance value of the sliding rheostat and the internal resistance value of the movement detection circuit;

[0027] The displacement of the current moving position of the target projection lens corresponding to the shift resistance component value relative to the shift origin is determined according to the pre-stored resistance length-resistance value variation curve of the sliding rheostat.

[0028] In an optional implementation, the relationship between the displacement of the current moving position relative to the axis shift origin and the voltage value of the constant voltage source, the rectifying length of the sliding rheostat, the rectifying resistance value of the sliding rheostat and the internal resistance value of the movement detection circuit is expressed by the following formula:

[0029]

[0030] Wherein, x is used to represent the displacement of the current moving position relative to the axis-shift origin, and x p Used to indicate the total resistance length of the sliding rheostat, V O It is used to represent the voltage value of the output voltage signal transmitted by the movement detection circuit, V S Used to represent the voltage value of the constant voltage source, R p Used to indicate the resistance value of the sliding rheostat, R L Used to indicate the internal resistance value of the movement detection circuit.

[0031] In an optional embodiment, the target driving parameter includes the axis shift rotation direction and the axis shift compensation angle value of the driving motor, the motor rotor of the driving motor is equipped with a first transmission gear, and the lead screw is equipped with a second transmission gear, wherein the first transmission gear and the second transmission gear are meshed with each other, and the step of generating the target driving parameter for the driving motor according to the current moving position and the target axis shift position includes:

[0032] Calculating the displacement difference between the target shift position and the current shift position relative to the shift origin, and obtaining the shift compensation displacement for the target projection lens;

[0033] When the axis shift compensation displacement is not zero, determining the axis shift rotation direction of the driving motor according to the positive and negative properties of the axis shift compensation displacement;

[0034] The axis shift compensation angle value of the driving motor is calculated according to the absolute value of the axis shift compensation displacement, the pitch of the lead screw, the gear radius of the second transmission gear, and the gear radius of the first transmission gear.

[0035] In a third aspect, the present application provides a projection lens shift device, which is applied to a control unit included in a projection lens shift system, wherein the shift system further includes a drive motor, a moving position detection component and a lead screw, wherein the moving position detection component and the drive motor are electrically connected to the control unit respectively, and the drive motor is used to drive a target projection lens to move on the lead screw, and the shift device includes:

[0036] A moving position acquisition module, used to acquire the current moving position of the target projection lens detected by the moving position detection component;

[0037] a driving parameter generating module, configured to generate a target driving parameter for the driving motor according to the current moving position and a target axis shift position, wherein the target axis shift position is a moving position of the target projection lens on the lead screw when a projection image is clear;

[0038] The motor-driven axis-shift module is used to control the driving motor to drive the target projection lens to move to the target axis-shift position on the lead screw according to the target driving parameter.

[0039] In a fourth aspect, the present application provides a projection lens shift system, the shift system comprising a lens base, a shift base, a drive motor, a lead screw, a moving position detection component and a control unit, wherein the lens base is used to install a target projection lens;

[0040] The drive motor and the screw rod are installed on the shifting base, and the drive motor is in transmission connection with the screw rod, wherein the drive motor can drive the screw rod to rotate relative to the shifting base;

[0041] The lens base is sleeved on the screw and matches with the screw thread, wherein the lens base can move on the screw with the target projection lens under the rotation of the screw;

[0042] The moving position detection component is installed on the shift base and detects the current moving position of the target projection lens on the lead screw;

[0043] The control unit is electrically connected to the moving position detection component and to the drive motor. When the control unit obtains the current moving position detected by the moving position detection component, it controls the operating condition of the drive motor according to the current moving position, so that the target projection lens moves on the lead screw to the target shift position corresponding to the projection image when the projection image is clear.

[0044] In an optional embodiment, the motor rotor of the driving motor is equipped with a first transmission gear, wherein the first transmission gear rotates coaxially with the motor rotor;

[0045] A second transmission gear is fixedly mounted on the end of the lead screw near the drive motor, and the second transmission gear is meshed with the first transmission gear, wherein the second transmission gear rotates with the lead screw under the transmission action of the first transmission gear.

[0046] In an optional embodiment, the mobile position detection component includes a constant voltage source, a sliding resistor and a mobile detection circuit;

[0047] The two rectifier connection ends of the sliding rheostat are electrically connected to the constant voltage source, the rheostat slider of the sliding rheostat is fixedly connected to the lens base, and the rectifier length extension direction of the sliding rheostat is parallel to the length extension direction of the lead screw;

[0048] The rectifying resistance connection end of the sliding rheostat close to the axis shift origin is electrically connected to the first input end of the movement detection circuit, and the rheostat slider of the sliding rheostat is electrically connected to the second input end of the movement detection circuit, and is used to transmit an output voltage signal matching the current movement position to the control unit through the movement detection circuit, wherein the rectifying resistance connection end of the sliding rheostat close to the axis shift origin is flush with the axis shift origin position.

[0049] In this case, the beneficial effects of the embodiments of the present application include the following:

[0050] The present application detects the current moving position of the target projection lens on the lead screw through a moving position detection component, and the driving motor generates target driving parameters based on the current moving position of the target projection lens and the target shift position, thereby driving the target projection lens on the lead screw from the current moving position to the target shift position corresponding to a clear projection image, thereby completing the lens shift operation in a timely and accurate manner based on the actual shift condition of the projection lens detected in real time, so as to improve the shift accuracy and efficiency of the projection lens while ensuring the shift effect of the projection lens, thereby improving the user experience.

[0051] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0053] Figure 1 This is a schematic diagram of the system composition of the projection lens shift system provided in an embodiment of the present application;

[0054] Figure 2 A second schematic diagram of the system composition of the projection lens shift system provided in an embodiment of the present application;

[0055] Figure 3 A schematic diagram of the components and connections of a mobile position detection component provided in an embodiment of the present application;

[0056] Figure 4 One of the flowcharts of the projection lens shift method provided in the embodiment of the present application;

[0057] Figure 5 A second flowchart of the projection lens shifting method provided in an embodiment of the present application;

[0058] Figure 6 A third flowchart of the projection lens shifting method provided in an embodiment of the present application;

[0059] Figure 7 for Figure 6 A schematic flow chart of the sub-steps included in step S310;

[0060] Figure 8 for Figure 6 A schematic flow chart of the sub-steps included in step S320;

[0061] Fig. 9 A schematic diagram of the composition of a projection lens shift device provided in an embodiment of the present application.

[0062] Icons: 10-projection lens shift system; 20-target projection lens; 11-lens base; 12-shift base; 13-drive motor; 14-screw; 15-movement position detection component; 16-control unit; 121-shift groove; 122-first mounting slot; 123-second mounting slot; 17-limiting piece; 18-first transmission gear; 19-second transmission gear; 151-constant voltage source; 152-sliding rheostat; 153-movement detection circuit; 100-projection lens shift device; 110-movement position acquisition module; 120-drive parameter generation module; 130-motor drive shift module. DETAILED DESCRIPTION

[0063] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0064] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0065] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0066] In the description of the present application, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the application is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0067] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0068] In addition, relational terms such as the terms "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of further restrictions, the elements defined by the statement "comprise one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood by specific circumstances.

[0069] Through painstaking research, the applicant discovered that the existing projection lens shift operation is achieved by directly monitoring and adjusting the number of forward steps of the stepper motor used for the shift operation. It is impossible to accurately understand the actual shift status of the projection lens (for example, whether the moving position of the projection lens is close to the target position for achieving a clear shift effect for the projection image, or whether the moving position of the projection lens has reached the target position), and it is impossible to drive the projection lens to move to the target position when the projection image is clear in time, which affects the user's experience of using the projection device.

[0070] In this case, in order to ensure the shift effect of the projection lens, improve the shift accuracy and shift efficiency of the projection lens, and enhance the user experience, the embodiments of the present application achieve the above functions by providing a projection lens shift method, device and system.

[0071] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0072] Please refer to Figure 1 , Figure 1 1 is one of the system composition diagrams of the projection lens shift system 10 provided in the embodiment of the present application. In the embodiment of the present application, the projection lens shift system 10 can detect the real shift status of the target projection lens 20 in real time, and complete the lens shift operation timely and accurately based on the real shift status of the target projection lens 20 detected in real time, thereby improving the user experience. The projection lens shift system 10 may include a lens base 11, a shift base 12, a drive motor 13, a screw 14, and a moving position detection component 15.

[0073] In this embodiment, the driving motor 13 is mounted on the shift base 12, and the screw rod 14 is also mounted on the shift base 12. The driving motor 13 is in transmission connection with the screw rod 14, and the driving motor 13 drives the screw rod 14 to rotate relative to the shift base 12. The lens base 11 is used to mount the target projection lens 20. The lens base 11 is sleeved on the screw rod 14 and matches the thread of the screw rod 14, so that the lens base 11 moves with the target projection lens 20 on the screw rod 14 under the rotation of the screw rod 14, so as to perform lens shift for the target projection lens 20. In this process, the shift direction of the target projection lens 20 is the length extension direction of the screw rod 14.

[0074] Optionally, in the first implementation of this embodiment, a first synchronous wheel ( Figure 1(not shown), a second synchronous wheel is installed on the end of the screw rod 14 close to the drive motor 13, and the first synchronous wheel and the second synchronous wheel are connected by a transmission belt. At this time, the transmission belt will be simultaneously mounted on the first synchronous wheel and the second synchronous wheel, so that when the motor rotor of the drive motor 13 drives the first synchronous wheel to rotate, the first synchronous wheel will drive the second synchronous wheel to rotate through the transmission belt under the action of friction, causing the screw rod 14 to rotate accordingly. Among them, the first synchronous wheel rotates coaxially with the motor rotor, and the second synchronous wheel rotates coaxially with the screw rod 14.

[0075] Optionally, in a second implementation of the present embodiment, a first transmission gear 18 may be installed on the motor rotor of the drive motor 13, and a second transmission gear 19 may be installed on the end of the screw rod 14 close to the drive motor 13, the second transmission gear 19 is fixedly connected to the screw rod 14, and the second transmission gear 19 and the first transmission gear 18 are meshed with each other, so that when the motor rotor of the drive motor 13 drives the first transmission gear 18 to rotate, the second transmission gear 19 will rotate in the opposite direction relative to the rotation direction of the first transmission gear 18 under the action of gear meshing, so as to drive the screw rod 14 to rotate. Among them, the first transmission gear 18 rotates coaxially with the motor rotor, the second transmission gear 19 rotates coaxially with the screw rod 14, the first transmission gear 18 and the second transmission gear 19 respectively rotate at the same arc length, and the second transmission gear 19 and the screw rod 14 respectively rotate at the same angle.

[0076] Optionally, in this embodiment, a shift groove 121 for accommodating the lens base 11, and a first mounting groove 122 and a second mounting groove 123 communicating with the shift groove 121 may be provided on one side surface of the shift base 12, wherein the first mounting groove 122 is arranged close to the driving motor 13, the second mounting groove 123 and the first mounting groove 122 are arranged opposite to each other, the groove depth of the shift groove 121 is greater than the groove depth of the first mounting groove 122, and the groove depth of the first mounting groove 122 is consistent with the groove depth of the second mounting groove 123. One end of the screw rod 14 is accommodated in the first mounting groove 122, and the other end of the screw rod 14 is accommodated in the second mounting groove 123, and the end of the screw rod 14 accommodated in the first mounting groove 122 is drivingly connected to the driving motor 13, so that the screw rod 14 can rotate relative to the first mounting groove 122 and the second mounting groove 123.

[0077] The lens base 11 is accommodated in the axis-shift groove 121, and a limiting member 17 is installed on the side wall of the axis-shift groove 121 away from the screw rod 14. The base surface of the lens base 11 away from the bottom of the axis-shift groove 121 abuts against the limiting member 17, and the limiting member 17 restricts the lens base 11 from rotating with the rotation of the screw rod 14, and ensures that the lens base 11 can only move in the axis-shift groove 121 in the length extension direction of the screw rod 14 under the rotation of the screw rod 14.

[0078] In this embodiment, the moving position detection component 15 is installed on the shift base 12 and is used to detect the current moving position of the target projection lens 20 on the lead screw 14 .

[0079] Optionally, in a first implementation of this embodiment, the mobile position detection component 15 may include a tape measure structure and a tape length detector ( Figure 1 (not shown), the flexible ruler end of the tape measure structure is clamped on the lens base 11, the tape measure structure can apply tension to the flexible ruler included in it to store the flexible ruler, and the ruler length detector is used to detect the ruler length of the flexible ruler extending from the tape measure structure, wherein the tension direction applied by the tape measure structure to the flexible ruler is parallel to the axis shift direction of the target projection lens 20. When the target projection lens 20 moves on the lead screw 14, the flexible ruler of the tape measure structure will be pulled out of the tape measure structure by the lens base 11, or the flexible ruler clamped on the lens base 11 will be loosened accordingly and stored by the tape measure structure.

[0080] At this time, the length difference between the current extended length and the original extended length can be calculated based on the current extended length of the flexible ruler detected by the ruler length detector and the original extended length of the flexible ruler when the target projection lens 20 is at the shift origin position (the starting moving position for initially performing the shift operation), that is, the displacement of the current moving position of the target projection lens 20 relative to the shift origin position can be obtained.

[0081] Please refer to Figure 2 , Figure 22 is a schematic diagram of the system composition of the projection lens shift system 10 provided in the embodiment of the present application. In the embodiment of the present application, the projection lens shift system 10 further includes a control unit 16, which can be used to control the operation of the drive motor 13, so that the target projection lens 20 moves from the current moving position on the lead screw 14 to the target shift position corresponding to when the projection picture is clear under the action of the drive motor 13, wherein the target shift position is the moving position of the target projection lens 20 on the lead screw 14 when the projection picture is clear.

[0082] In this embodiment, the control unit 16 is electrically connected to the moving position detection component 15 and to the drive motor 13, and is used to obtain the current moving position of the target projection lens 20 on the screw rod 14 detected by the moving position detection component 15, and control the operating status of the drive motor 13 according to the current moving position.

[0083] Optionally, in the first implementation of the present embodiment, after obtaining the displacement of the current moving position detected by the moving position detection component 15 relative to the axis-shift origin position, the control unit 16 may send the displacement of the current moving position relative to the axis-shift origin position to a computer device through a network, and the computer device generates a matching target driving parameter for the drive motor 13 based on the displacement of the current moving position and the target axis-shift position relative to the axis-shift origin position, and feeds it back to the control unit 16. At this time, the control unit 16 will directly send the target driving parameter to the drive motor 13, so that the drive motor 13 drives the target projection lens 20 to move directly from the current moving position on the screw rod 14 to the target axis-shift position according to the target driving parameter, thereby timely and accurately achieving a clear axis-shift effect for the projection image.

[0084] Optionally, in a second implementation of the present embodiment, after obtaining the displacement of the current moving position detected by the moving position detection component 15 relative to the axis-shift origin position, the control unit 16 can generate matching target driving parameters for the drive motor 13 based on the displacement of the current moving position and the target axis-shift position relative to the axis-shift origin position, and control the operating condition of the drive motor 13 according to the target driving parameters, so that the drive motor 13 can drive the target projection lens 20 to move directly from the current moving position on the screw rod 14 to the target axis-shift position, thereby achieving a clear axis-shift effect of the projection picture in a timely and accurate manner.

[0085] Therefore, the present application can perform real-time detection of the actual shift status of the target projection lens 20 on the screw 14 through the above-mentioned projection lens shift system 10, and based on the difference between the actual shift status and the target shift position, promptly and accurately drive the target projection lens 20 to move to the target shift position when the projection image on the screw 14 is clear, thereby ensuring the shift effect of the projection lens while improving the shift accuracy and shift efficiency of the projection lens, thereby improving the user experience.

[0086] Optionally, see Figure 3 , Figure 3 1 is a schematic diagram of the composition and connection of the mobile position detection component 15 provided in the embodiment of the present application. In the second implementation of the present embodiment, the mobile position detection component 15 may include a constant voltage source 151, a sliding rheostat 152 and a mobile detection circuit 153. Both the two rectifier connection ends of the sliding rheostat 152 are electrically connected to the constant voltage source 151, and the relative position between the rheostat slider of the sliding rheostat 152 and the target projection lens 20 is fixed (that is, when the target projection lens 20 moves on the lead screw 14, the position of the rheostat slider on the sliding rheostat 152 will change), and at this time, the rheostat slider of the sliding rheostat 152 is fixedly connected to the lens base 11, and the rectifier length extension direction of the sliding rheostat 152 is parallel to the length extension direction of the lead screw 14.

[0087] The rectifier connection end of the sliding rheostat 152 near the axis shift origin is electrically connected to the first input end (IN1) of the movement detection circuit 153, and the rheostat slider of the sliding rheostat 152 is electrically connected to the second input end (IN2) of the movement detection circuit 153, so that the movement detection circuit 153 represents the displacement of the current movement position relative to the axis shift origin by showing an output voltage signal (Vout) matching the current movement position. The rectifier connection end of the sliding rheostat 152 near the axis shift origin is flush with the axis shift origin.

[0088] Therefore, this application can be Figure 3 The component composition of the moving position detection component 15 shown improves the detection accuracy of the moving position detection component 15 for the current moving position of the target projection lens 20 on the lead screw 14.

[0089] In the present application, in order to ensure that the above-mentioned projection lens shift system 10 can effectively improve the shift accuracy and shift efficiency of the projection lens while ensuring the shift effect of the projection lens, and improve the user experience, the embodiment of the present application realizes the above-mentioned functions by providing a projection lens shift method applied to the above-mentioned projection lens shift system 10. The projection lens shift method applied to the above-mentioned projection lens shift system 10 is described in detail below.

[0090] Please refer to Figure 4 , Figure 4 is one of the flow charts of the projection lens shift method provided in the embodiment of the present application. In the embodiment of the present application, Figure 4 The projection lens shift method shown may include steps S210 to S230, so that the target projection lens 20 can be timely and accurately moved to the target shift position on the lead screw 14 to ensure a clear projection image, thereby ensuring the shift effect of the projection lens and improving user experience.

[0091] Step S210: The moving position detection component detects the current moving position of the target projection lens on the lead screw.

[0092] Step S220 , the driving motor acquires a target driving parameter, wherein the target driving parameter is generated based on the current moving position and the target shift position, and the target shift position is the moving position of the target projection lens on the lead screw when the projection image is clear.

[0093] In this embodiment, the target driving parameter can be used to indicate the motor operation parameter corresponding to the drive motor 13 driving the target projection lens 20 to move from the current moving position on the screw rod 14 to the target axis shift position, and the target driving parameter includes the axis shift rotation direction and the axis shift compensation angle value of the drive motor 13, wherein the axis shift rotation direction is used to indicate the rotation direction of the drive motor 13 currently driving the target projection lens 20 to achieve the axis shift operation, and the axis shift compensation angle value is used to indicate the angle value required for the drive motor 13 to currently drive the target projection lens 20 to achieve the axis shift operation. The target driving parameter can be generated by a control unit 16 electrically connected to the drive motor 13, or generated by an external computer device and transmitted to the drive motor 13 via the control unit 16.

[0094] In one implementation of this embodiment, the motor rotor of the drive motor 13 is installed with a first transmission gear 18, and the screw rod 14 is installed with a second transmission gear 19, wherein the first transmission gear 18 and the second transmission gear 19 are meshed with each other. At this time, the step of generating the target drive parameter includes:

[0095] Calculating the displacement difference between the target shift position and the current shift position relative to the shift origin, and obtaining the shift compensation displacement for the target projection lens 20;

[0096] When the axis shift compensation displacement is not zero, the axis shift rotation direction of the driving motor 13 is determined according to the positive and negative properties of the axis shift compensation displacement;

[0097] The shift compensation angle value of the driving motor 13 is calculated according to the absolute value of the shift compensation displacement, the pitch of the screw rod 14 , the gear radius of the second transmission gear 19 , and the gear radius of the first transmission gear 18 .

[0098] Wherein, if the shift compensation displacement is zero, it means that the target projection lens 20 has currently achieved the shift effect when the projection picture is clear. At this time, the drive motor 13 can be controlled to stop rotating to maintain the shift effect when the current projection picture is clear. Wherein, the shift compensation angle value can be calculated based on the movement principle that the rotation arc lengths of the first transmission gear 18 and the second transmission gear 19 must be consistent, the rotation angles of the lead screw 14 and the second transmission gear 19 must be consistent, and the target projection lens 20 moves a pitch distance on the lead screw 14. The step of determining the shift rotation direction of the drive motor 13 according to the positive and negative attribute conditions of the shift compensation displacement includes:

[0099] If the positive and negative attribute status indicates that the axis shift compensation displacement is a positive number, the positive rotation direction of the drive motor 13 is used as the axis shift rotation direction of the drive motor 13;

[0100] If the positive and negative attribute status indicates that the offset compensation displacement is a negative number, the reverse rotation direction of the driving motor 13 is used as the offset rotation direction of the driving motor 13 .

[0101] Among them, when the positive and negative attribute status indicates that the axis shift compensation displacement is a positive number, the displacement of the target axis shift position relative to the axis shift origin is greater than the displacement of the current movement position relative to the axis shift origin. At this time, the drive motor 13 needs to increase the displacement of the current movement position of the target projection lens 20 relative to the axis shift origin, and the positive rotation direction of the drive motor 13 needs to be maintained unchanged, that is, the positive rotation direction of the drive motor 13 is used as the axis shift rotation direction of the drive motor 13, and the positive rotation direction is used to indicate the rotation direction of the drive motor 13 when increasing the displacement of the current movement position relative to the axis shift origin.

[0102] When the positive and negative attribute condition indicates that the axis shift compensation displacement is a negative number, the displacement of the target axis shift position relative to the axis shift origin is less than the displacement of the current movement position relative to the axis shift origin. At this time, the drive motor 13 needs to reduce the displacement of the current movement position of the target projection lens 20 relative to the axis shift origin, and the reverse direction of rotation of the drive motor 13 needs to be maintained unchanged, that is, the reverse direction of rotation of the drive motor 13 is used as the axis shift rotation direction of the drive motor 13. The reverse direction of rotation is used to indicate the rotation direction of the drive motor 13 when reducing the displacement of the current movement position relative to the axis shift origin. The reverse direction of rotation is opposite to the positive direction of rotation.

[0103] Step S230 : The driving motor drives the target projection lens to move to the target shift position on the lead screw according to the target driving parameters.

[0104] Therefore, the present application can perform real-time detection of the actual shift status of the projection lens on the screw 14 by executing the above-mentioned steps S210 to S230, and directly drive the projection lens to move to the target shift position on the screw 14 in a timely and accurate manner, so as to improve the shift accuracy and shift efficiency of the projection lens while ensuring the shift effect of the projection lens, and improve the user experience.

[0105] Optionally, see Figure 5 , Figure 5 This is the second flow chart of the projection lens shifting method provided in the embodiment of the present application. In the embodiment of the present application, Figure 5 The projection lens shift method shown is similar to Figure 4 Compared to the projection lens shift method shown, Figure 5 The projection lens shift method shown may further include step S240 and step S250, so as to accurately determine the target driving parameters required for the driving motor 13 to drive the target projection lens 20 to achieve a shift effect when the projection image is clear.

[0106] Step S240: the control unit obtains the current moving position detected by the moving position detection component.

[0107] In this embodiment, after detecting the current moving position of the target projection lens 20 on the lead screw 14, the moving position detection component 15 can feed back an output voltage signal matching the current moving position to the control unit 16, so that the control unit 16 can identify the displacement of the current moving position of the target projection lens 20 relative to the axis shift origin based on the output voltage signal.

[0108] In one implementation of this embodiment, the mobile position detection component 15 may include the above-mentioned constant voltage source 151, the above-mentioned sliding resistor 152 and the above-mentioned mobile detection circuit 153. The connection method of the above-mentioned constant voltage source 151, the above-mentioned sliding resistor 152 and the above-mentioned mobile detection circuit 153 is as follows: Figure 3 As shown, at this time, the step of the control unit 16 acquiring the current moving position detected by the moving position detection component 15 may include:

[0109] Receiving an output voltage signal transmitted by the mobile position detection component 15 through the mobile detection circuit 153;

[0110] According to the voltage value of the output voltage signal, the pre-stored voltage value of the constant voltage source 151, the rectifying length of the sliding rheostat 152, the rectifying resistance value of the sliding rheostat 152 and the internal resistance value of the movement detection circuit 153, the shifting resistance component value of the sliding rheostat 152 connected in parallel with the movement detection circuit 153 is calculated;

[0111] According to the pre-stored resistance length-resistance value variation curve of the sliding rheostat 152 , the displacement of the current moving position of the target projection lens 20 corresponding to the shift resistance component value relative to the shift origin is determined.

[0112] The resistance length-resistance value change curve can be used to represent the numerical mapping relationship between the variable resistor segment length from the variable resistor slider position to the rectifier connection end flush with the axis shift origin position of the sliding variable resistor 152 and the resistance value of the variable resistor gradation. In this case, the relationship between the displacement of the current moving position relative to the axis shift origin and the voltage value of the constant voltage source 151, the rectifier length of the sliding variable resistor 152, the rectifier resistance value of the sliding variable resistor 152 and the internal resistance value of the movement detection circuit 153 is represented by the following formula:

[0113]

[0114] Wherein, x is used to represent the displacement of the current moving position relative to the axis-shift origin, and x p It is used to represent the resistance length of the sliding rheostat 152, V O It is used to represent the voltage value of the output voltage signal transmitted by the movement detection circuit 153, V S It is used to indicate the voltage value of the constant voltage source 151, R p It is used to represent the resistance value of the sliding rheostat 152, R L It is used to indicate the internal resistance value of the movement detection circuit 153 .

[0115] Therefore, the present application can accurately identify the displacement of the current moving position of the target projection lens 20 relative to the axis shift origin through the execution process corresponding to the above step S240.

[0116] Step S250 : The control unit generates a target driving parameter for the driving motor according to the current moving position and the target axis shift position.

[0117] In this embodiment, the target driving parameters include the axis shift rotation direction and the axis shift compensation angle value of the driving motor 13. If the motor rotor of the driving motor 13 is equipped with a first transmission gear 18, and the screw rod 14 is equipped with a second transmission gear 19, wherein the first transmission gear 18 and the second transmission gear 19 are meshed with each other, then the control unit 16 generates the target driving parameters for the driving motor 13 according to the current moving position and the target axis shift position, including:

[0118] Calculating the displacement difference between the target shift position and the current shift position relative to the shift origin, and obtaining the shift compensation displacement for the target projection lens 20;

[0119] When the axis shift compensation displacement is not zero, the axis shift rotation direction of the driving motor 13 is determined according to the positive and negative properties of the axis shift compensation displacement;

[0120] The offset compensation angle value of the driving motor 13 is calculated according to the absolute value of the offset compensation displacement, the pitch of the screw rod 14 , the gear radius of the second transmission gear 19 , and the gear radius of the first transmission gear 18 .

[0121] Wherein, if the shift compensation displacement is zero, it means that the target projection lens 20 has currently achieved the shift effect when the projection picture is clear. At this time, the drive motor 13 can be controlled to stop rotating to maintain the shift effect when the current projection picture is clear. Wherein, the shift compensation angle value can be calculated based on the movement principle that the rotation arc lengths of the first transmission gear 18 and the second transmission gear 19 must be consistent, the rotation angles of the lead screw 14 and the second transmission gear 19 must be consistent, and the target projection lens 20 moves a pitch distance on the lead screw 14. The step of determining the shift rotation direction of the drive motor 13 according to the positive and negative attribute conditions of the shift compensation displacement includes:

[0122] If the positive and negative attribute status indicates that the axis shift compensation displacement is a positive number, the positive rotation direction of the drive motor 13 is used as the axis shift rotation direction of the drive motor 13;

[0123] If the positive and negative attribute status indicates that the offset compensation displacement is a negative number, the reverse rotation direction of the driving motor 13 is used as the offset rotation direction of the driving motor 13 .

[0124] Therefore, the present application can accurately determine the target driving parameters required when the driving motor 13 drives the target projection lens 20 to achieve a clear shift effect for the projection image through the respective execution processes of the above step S240 and step S250.

[0125] In the present application, in order to ensure that the control unit 16 included in the above-mentioned projection lens shift system 10 can cooperate with the movement position detection component 15 and the drive motor 13 to promptly and accurately drive the target projection lens 20 to move directly from the current movement position on the lead screw 14 to the target shift position, thereby improving the shift accuracy and efficiency of the projection lens and improving the user experience, the embodiment of the present application realizes the above-mentioned functions by providing a projection lens shift method applied to the above-mentioned control unit 16. The projection lens shift method applied to the above-mentioned control unit 16 is described in detail below.

[0126] Please refer to Figure 6 , Figure 6 This is the third flow chart of the projection lens shifting method provided in the embodiment of the present application. In the embodiment of the present application, Figure 6 The projection lens shift method shown may include steps S310 to S330, so as to timely and accurately drive the target projection lens 20 to move directly from the current moving position on the lead screw 14 to the target shift position, thereby improving the shift accuracy and efficiency of the projection lens and enhancing the user experience.

[0127] Step S310, obtaining the current moving position of the target projection lens on the lead screw detected by the moving position detection component.

[0128] Optionally, see Figure 7 , Figure 7 yes Figure 6 In one implementation of this embodiment, the mobile position detection component 15 may include a constant voltage source 151, a sliding resistor 152 and a mobile detection circuit 153. The connection method of the constant voltage source 151, the sliding resistor 152 and the mobile detection circuit 153 is as follows: Figure 3 As shown, at this time, the step S310 may include sub-steps S311 to S313 to accurately identify the current moving position of the target projection lens 20 on the lead screw 14 .

[0129] Sub-step S311, receiving an output voltage signal transmitted by the mobile position detection component through the mobile detection circuit.

[0130] Sub-step S312, calculates the shift resistance component value of the sliding resistor in parallel with the movement detection circuit according to the voltage value of the output voltage signal, the voltage value of the pre-stored constant voltage source, the rectification length of the sliding resistor, the rectification resistance value of the sliding resistor and the internal resistance value of the movement detection circuit.

[0131] Sub-step S313, determining the displacement of the current moving position of the target projection lens corresponding to the shift resistance component value relative to the shift origin according to the pre-stored resistance length-resistance value variation curve of the sliding rheostat.

[0132] The resistance length-resistance value change curve can be used to represent the numerical mapping relationship between the variable resistor segment length from the variable resistor slider position to the rectifier connection end flush with the axis shift origin position of the sliding variable resistor 152 and the resistance value of the variable resistor gradation. In this case, the relationship between the displacement of the current moving position relative to the axis shift origin and the voltage value of the constant voltage source 151, the rectifier length of the sliding variable resistor 152, the rectifier resistance value of the sliding variable resistor 152 and the internal resistance value of the movement detection circuit 153 is represented by the following formula:

[0133]

[0134] Wherein, x is used to represent the displacement of the current moving position relative to the axis-shift origin, and x p It is used to represent the resistance length of the sliding rheostat 152, V O It is used to represent the voltage value of the output voltage signal transmitted by the movement detection circuit 153, V S It is used to indicate the voltage value of the constant voltage source 151, R p It is used to represent the resistance value of the sliding rheostat 152, R L It is used to indicate the internal resistance value of the movement detection circuit 153 .

[0135] Therefore, the present application can accurately identify the displacement of the current moving position of the target projection lens 20 relative to the axis shift origin by executing the above sub-steps S311 to S313.

[0136] Step S320 , generating target driving parameters for the driving motor according to the current moving position and the target shift position, wherein the target shift position is the moving position of the target projection lens on the lead screw when the projection image is clear.

[0137] In this embodiment, the target driving parameters include the shift rotation direction and the shift compensation angle value of the driving motor 13 .

[0138] Optionally, see Figure 8 , Figure 8yes Figure 6 Schematic diagram of the flow chart of the sub-steps included in step S320 of the embodiment. In one implementation of the present embodiment, if the motor rotor of the driving motor 13 is installed with a first transmission gear 18, and the screw rod 14 is installed with a second transmission gear 19, wherein the first transmission gear 18 and the second transmission gear 19 are meshed with each other, then the step S320 may include sub-steps S321 to S323 to generate target driving parameters for the driving motor 13 for driving the target projection lens 20 to move directly from the current moving position on the screw rod 14 to the target axis shift position.

[0139] Sub-step S321, calculating the displacement difference between the target shift position and the current shift position relative to the shift origin, and obtaining the shift compensation displacement for the target projection lens.

[0140] Sub-step S322, when the offset compensation displacement is not zero, determining the offset rotation direction of the driving motor according to the positive and negative properties of the offset compensation displacement.

[0141] Sub-step S323, calculating the axis shift compensation angle value of the driving motor according to the absolute value of the axis shift compensation displacement, the pitch of the lead screw, the gear radius of the second transmission gear, and the gear radius of the first transmission gear.

[0142] The shift compensation angle value can be calculated based on the principle that the rotation arc lengths of the first transmission gear 18 and the second transmission gear 19 must be consistent, the rotation angles of the lead screw 14 and the second transmission gear 19 must be consistent, and the target projection lens 20 moves a pitch on the lead screw 14 by one turn of the lead screw 14. The step of determining the shift rotation direction of the drive motor 13 according to the positive and negative attributes of the shift compensation displacement includes:

[0143] If the positive and negative attribute status indicates that the axis shift compensation displacement is a positive number, the positive rotation direction of the drive motor 13 is used as the axis shift rotation direction of the drive motor 13;

[0144] If the positive and negative attribute status indicates that the offset compensation displacement is a negative number, the reverse rotation direction of the driving motor 13 is used as the offset rotation direction of the driving motor 13 .

[0145] Therefore, the present application can generate target driving parameters for driving the target projection lens 20 to directly move from the current moving position on the lead screw 14 to the target axis shift position for the driving motor 13 by executing the above sub-steps S321 to S323.

[0146] Step S330 , controlling the driving motor to drive the target projection lens to move to the target shift position on the lead screw according to the target driving parameters.

[0147] Therefore, the present application can timely and accurately drive the target projection lens 20 to move directly from the current moving position on the screw 14 to the target shift position by executing the above steps S310 to S330, thereby improving the shift accuracy and efficiency of the projection lens and improving the user experience.

[0148] In this application, in order to ensure that the control unit 16 can execute Figure 6 The projection lens shift method shown in the embodiment of the present application provides a projection lens shift device 100 that can be stored in the control unit 16 in the form of software or firmware, and implements the above functions by dividing the projection lens shift device 100 into functional modules. The specific components of the projection lens shift device 100 provided by the present application are described below.

[0149] Please refer to Fig. 9 , Fig. 9 1 is a schematic diagram of the components of a projection lens shift device 100 provided in an embodiment of the present application. In the embodiment of the present application, the projection lens shift device 100 may include a moving position acquisition module 110, a driving parameter generation module 120 and a motor driven shift module 130.

[0150] The moving position acquisition module 110 is used to acquire the current moving position of the target projection lens detected by the moving position detection component.

[0151] The driving parameter generating module 120 is used to generate target driving parameters for the driving motor according to the current moving position and the target shift position, wherein the target shift position is the moving position of the target projection lens on the lead screw when the projection image is clear.

[0152] The motor-driven axis-shift module 130 is used to control the driving motor to drive the target projection lens to move to the target axis-shift position on the lead screw according to the target driving parameters.

[0153] It should be noted that the basic principle and technical effects of the projection lens shift device 100 provided in the embodiment of the present application are similar to those of the aforementioned Figure 6 The projection lens shift method shown is the same. For the sake of simplicity, the parts not mentioned in this embodiment can be referred to above. Figure 6 The description of the projection lens shift method shown in FIG.

[0154] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely schematic, for example, the flowcharts and block diagrams in the accompanying drawings show the possible architecture, functions and operations of the devices, methods and computer program products according to the embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of a code, and the module, a program segment or a part of a code contains one or more executable instructions for implementing the specified logical functions. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or the flowchart, and the combination of boxes in the block diagram and / or the flowchart can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0155] In summary, in the projection lens shift method, device and system provided in the present application, the present application detects the current moving position of the target projection lens on the lead screw through a moving position detection component, and the drive motor generates a target driving parameter based on the current moving position of the target projection lens and the target shift position, driving the target projection lens on the lead screw from the current moving position to the target shift position corresponding to the projection picture being clear, thereby completing the lens shift operation in a timely and accurate manner based on the real shift condition of the projection lens detected in real time, so as to improve the shift accuracy and efficiency of the projection lens while ensuring the shift effect of the projection lens, thereby improving the user experience.

[0156] The above are only various implementations of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A projection lens shift method, characterized in that: The invention is applied to a projection lens shift system, wherein the shift system comprises a driving motor, a moving position detection component and a lead screw, the driving motor is used to drive the target projection lens to move on the lead screw, the moving position detection component comprises a constant voltage source, a sliding rheostat and a moving detection circuit, both the two rectifier connection ends of the sliding rheostat are electrically connected to the constant voltage source, the relative position between the rheostat slider of the sliding rheostat and the target projection lens is fixed, the rectifier connection end of the sliding rheostat flush with the position of the shift origin is electrically connected to the first input end of the moving detection circuit, the rheostat slider of the sliding rheostat is electrically connected to the second input end of the moving detection circuit, so as to represent the displacement of the current moving position of the target projection lens on the lead screw relative to the shift origin through the output voltage signal of the moving detection circuit; The axis-shifting method comprises: The moving position detection component detects the current moving position of the target projection lens on the lead screw; The drive motor acquires a target drive parameter, wherein the target drive parameter is generated based on the current moving position and a target axis shift position, and the target axis shift position is a moving position of the target projection lens on the lead screw when a projection image is clear; The driving motor drives the target projection lens to move to the target shift position on the lead screw according to the target driving parameter.

2. The tilt-shift method according to claim 1, characterized in that: The projection lens shift system further includes a control unit, the moving position detection component and the driving motor are electrically connected to the control unit respectively, and the shift method further includes: The control unit acquires the current moving position detected by the moving position detection component; The control unit generates a target driving parameter for the driving motor according to the current moving position and the target axis shift position.

3. The shifting method according to claim 1 or 2, characterized in that: The target driving parameters include the axis shift rotation direction and the axis shift compensation angle value of the driving motor, the motor rotor of the driving motor is equipped with a first transmission gear, and the lead screw is equipped with a second transmission gear, wherein the first transmission gear and the second transmission gear are meshed with each other, and the step of generating the target driving parameters includes: Calculating the displacement difference between the target shift position and the current shift position relative to the shift origin, and obtaining the shift compensation displacement for the target projection lens; When the axis shift compensation displacement is not zero, determining the axis shift rotation direction of the driving motor according to the positive and negative properties of the axis shift compensation displacement; The axis shift compensation angle value of the driving motor is calculated according to the absolute value of the axis shift compensation displacement, the pitch of the lead screw, the gear radius of the second transmission gear, and the gear radius of the first transmission gear.

4. The tilt-shift method according to claim 3, characterized in that: The step of determining the axis shift rotation direction of the driving motor according to the positive and negative attribute conditions of the axis shift compensation displacement comprises: If the positive and negative attribute status indicates that the offset compensation displacement is a positive number, the positive rotation direction of the drive motor is used as the offset rotation direction of the drive motor; If the positive and negative attribute status indicates that the offset compensation displacement is a negative number, the opposite rotation direction of the driving motor is used as the offset rotation direction of the driving motor.

5. A projection lens shifting method, characterized in that: A control unit applied to a projection lens shift system, wherein the shift system further comprises a driving motor, a moving position detection component and a lead screw, wherein the moving position detection component and the driving motor are electrically connected to the control unit respectively, wherein the driving motor is used to drive a target projection lens to move on the lead screw, wherein the moving position detection component comprises a constant voltage source, a sliding rheostat and a moving detection circuit, wherein both rectifier connection ends of the sliding rheostat are electrically connected to the constant voltage source, wherein the relative position between the rheostat slider of the sliding rheostat and the target projection lens is fixed, wherein the rectifier connection end of the sliding rheostat flush with the position of the shift origin is electrically connected to the first input end of the moving detection circuit, and the rheostat slider of the sliding rheostat is electrically connected to the second input end of the moving detection circuit, so as to represent the displacement of the current moving position of the target projection lens on the lead screw relative to the shift origin through the output voltage signal of the moving detection circuit; The axis-shifting method comprises: Acquire the current moving position of the target projection lens on the lead screw detected by the moving position detection component; generating a target driving parameter for the driving motor according to the current moving position and the target axis shift position, wherein the target axis shift position is the moving position of the target projection lens on the lead screw when the projection image is clear; The driving motor is controlled to drive the target projection lens to move to the target shift position on the lead screw according to the target driving parameter.

6. The tilt-shift method according to claim 5, characterized in that: The step of acquiring the current moving position of the target projection lens detected by the moving position detection component comprises: receiving an output voltage signal transmitted by the mobile position detection component through a mobile detection circuit; Calculating the axis shift resistance component value of the sliding rheostat connected in parallel with the movement detection circuit according to the voltage value of the output voltage signal, the pre-stored voltage value of the constant voltage source, the rectification length of the sliding rheostat, the rectification resistance value of the sliding rheostat and the internal resistance value of the movement detection circuit; The displacement of the current moving position of the target projection lens corresponding to the shift resistance component value relative to the shift origin is determined according to the pre-stored resistance length-resistance value variation curve of the sliding rheostat.

7. The tilt-shift method according to claim 6, characterized in that: The relationship between the displacement of the current moving position relative to the axis shift origin and the voltage value of the constant voltage source, the rectifying length of the sliding rheostat, the rectifying resistance value of the sliding rheostat and the internal resistance value of the movement detection circuit is expressed by the following formula: Wherein, x is used to represent the displacement of the current moving position relative to the axis-shift origin, and x p Used to indicate the total resistance length of the sliding rheostat, V O It is used to represent the voltage value of the output voltage signal transmitted by the movement detection circuit, V S Used to represent the voltage value of the constant voltage source, R p Used to indicate the resistance value of the sliding rheostat, R L Used to indicate the internal resistance value of the movement detection circuit.

8. The tilt-shift method according to any one of claims 5 to 7, characterized in that: The target driving parameters include the axis shift rotation direction and the axis shift compensation angle value of the driving motor, the motor rotor of the driving motor is equipped with a first transmission gear, the lead screw is equipped with a second transmission gear, wherein the first transmission gear and the second transmission gear are meshed with each other, and the step of generating the target driving parameters for the driving motor according to the current moving position and the target axis shift position includes: Calculating the displacement difference between the target shift position and the current shift position relative to the shift origin, and obtaining the shift compensation displacement for the target projection lens; When the axis shift compensation displacement is not zero, determining the axis shift rotation direction of the driving motor according to the positive and negative properties of the axis shift compensation displacement; The axis shift compensation angle value of the driving motor is calculated according to the absolute value of the axis shift compensation displacement, the pitch of the lead screw, the gear radius of the second transmission gear, and the gear radius of the first transmission gear.

9. A projection lens shift device, characterized in that: A control unit applied to a projection lens shift system, wherein the shift system further comprises a driving motor, a moving position detection component and a lead screw, wherein the moving position detection component and the driving motor are electrically connected to the control unit respectively, wherein the driving motor is used to drive a target projection lens to move on the lead screw, wherein the moving position detection component comprises a constant voltage source, a sliding rheostat and a moving detection circuit, wherein both rectifier connection ends of the sliding rheostat are electrically connected to the constant voltage source, wherein the relative position between the rheostat slider of the sliding rheostat and the target projection lens is fixed, wherein the rectifier connection end of the sliding rheostat flush with the position of the shift origin is electrically connected to the first input end of the moving detection circuit, and the rheostat slider of the sliding rheostat is electrically connected to the second input end of the moving detection circuit, so as to represent the displacement of the current moving position of the target projection lens on the lead screw relative to the shift origin through the output voltage signal of the moving detection circuit; The axis shifting device comprises: A moving position acquisition module, used to acquire the current moving position of the target projection lens detected by the moving position detection component; a driving parameter generating module, configured to generate a target driving parameter for the driving motor according to the current moving position and a target axis shift position, wherein the target axis shift position is a moving position of the target projection lens on the lead screw when a projection image is clear; The motor-driven axis-shift module is used to control the driving motor to drive the target projection lens to move to the target axis-shift position on the lead screw according to the target driving parameter.

10. A projection lens shift system, characterized in that: The shift system comprises a lens base, a shift base, a drive motor, a lead screw, a moving position detection component and a control unit, wherein the lens base is used to install a target projection lens; The drive motor and the screw rod are installed on the shifting base, and the drive motor is in transmission connection with the screw rod, wherein the drive motor can drive the screw rod to rotate relative to the shifting base; The lens base is sleeved on the screw and matches with the screw thread, wherein the lens base can move on the screw with the target projection lens under the rotation of the screw; The moving position detection component is installed on the shift base and detects the current moving position of the target projection lens on the lead screw; The control unit is electrically connected to the moving position detection component and to the driving motor, wherein the control unit controls the operation of the driving motor according to the current moving position after obtaining the current moving position detected by the moving position detection component, so that the target projection lens moves on the lead screw to a target axis shift position corresponding to a clear projection image; Wherein, the mobile position detection component includes a constant voltage source, a sliding rheostat and a mobile detection circuit; The two rectifier connection ends of the sliding rheostat are electrically connected to the constant voltage source, the rheostat slider of the sliding rheostat is fixedly connected to the lens base, and the rectifier length extension direction of the sliding rheostat is parallel to the length extension direction of the lead screw; The rectifying resistance connection end of the sliding rheostat close to the axis shift origin is electrically connected to the first input end of the movement detection circuit, and the rheostat slider of the sliding rheostat is electrically connected to the second input end of the movement detection circuit, and is used to transmit an output voltage signal matching the current movement position to the control unit through the movement detection circuit, wherein the rectifying resistance connection end of the sliding rheostat close to the axis shift origin is flush with the axis shift origin position, and the output voltage signal of the movement detection circuit is used to characterize the displacement of the current movement position relative to the axis shift origin.

11. The shift system according to claim 10, characterized in that: The motor rotor of the driving motor is provided with a first transmission gear, wherein the first transmission gear rotates coaxially with the motor rotor; A second transmission gear is fixedly mounted on the end of the lead screw near the drive motor, and the second transmission gear is meshed with the first transmission gear, wherein the second transmission gear rotates with the lead screw under the transmission action of the first transmission gear.

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