Control device for lens switching and projection system

Abstract

The utility model discloses a control device for lens switching and a projection system, and relates to the technical field of projection. The control device for lens switching comprises a motion assembly which at least comprises a motion platform, and the motion platform is used for placing a plurality of lens modules; the driving module is electrically connected with the movement assembly; each position indication module comprises a detection unit and a position indication unit, and the position indication units are electrically connected with the detection units; and the main control module is electrically connected with the driving module and the position indication module, and is used for continuously outputting a target driving signal to the driving module according to a target position indication signal after receiving the target projection mode instruction, so as to drive the motion platform to move until the target lens module moves to a light path where the light beam output by the light source is located. Thus, multiple sets of light sources are not needed, multiple projection modes can be achieved only through one set of light sources, and the problem that the cost of a projection system is too high is effectively solved.

Description

Technical Field

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

[0002] In related technologies, in order to meet the needs of multi-functional projection lighting, a set of optical systems needs to realize different functions in a time-sharing manner. For example, the headlights realize the lighting function when the car is driving, and the headlights realize the movie projection function when the car is parked. However, the traditional design uses multiple sets of light sources and lens systems, which has the problem of high cost. Utility Model Content

[0003] The present application proposes a control device for lens switching and a projection system.

[0004] In a first aspect, an embodiment of the present application provides a control device for lens switching, the device comprising: a motion component, the motion component comprising at least a motion platform, the motion platform being used to place a plurality of lens modules, the plurality of lens modules corresponding one-to-one to a plurality of preset projection modes, and different lens modules being arranged at different positions on the motion platform; a driving module electrically connected to the motion component; a plurality of position indication modules, each of the position indication modules comprising a detection unit and a position indication unit, the plurality of position indication modules corresponding one-to-one to the plurality of preset projection modes, the position indication unit being electrically connected to the detection unit, the position indication unit being used to generate a position indication according to an output signal of the detection unit. The main control module is electrically connected to the driving module and the position indicating module, and is used to continuously output a target driving signal to the driving module according to the target position indicating signal after receiving the target projection mode instruction, so as to drive the motion platform to move until the target lens module moves to the optical path where the light beam output by the light source is located, the target projection mode is any preset projection mode among the multiple preset projection modes, the target lens module is a lens module among the multiple lens modules corresponding to the target projection mode, and the target position indicating signal is a position indicating signal output by the position indicating module corresponding to the target projection mode.

[0005] In a second aspect, an embodiment of the present application provides a projection system, which includes a light source, a plurality of lens modules, and the aforementioned control device for lens switching.

[0006] In the solution provided by the present application, the control device for lens switching includes: a motion component, the motion component includes at least a motion platform, the motion platform is used to place a plurality of lens modules, the plurality of lens modules correspond one-to-one to a plurality of preset projection modes, and different lens modules are set at different positions on the motion platform; a driving module, electrically connected to the motion component; a plurality of position indication modules, each of the position indication modules includes a detection unit and a position indication unit, the plurality of position indication modules correspond one-to-one to the plurality of preset projection modes, the position indication unit is electrically connected to the detection unit, and the position indication unit is used to generate a position indication signal according to the output signal of the detection unit, and to output the position indication signal to the detection unit. The position indication signal is output to a main control module; the main control module is electrically connected to the drive module and the position indication module, and is configured to, after receiving a target projection mode instruction, continuously output a target drive signal to the drive module according to the target position indication signal to drive the motion platform until the target lens module moves to the optical path of the light beam output by the light source, wherein the target projection mode is any one of the plurality of preset projection modes, the target lens module is a lens module corresponding to the target projection mode among the plurality of lens modules, and the target position indication signal is a position indication signal output by the position indication module corresponding to the target projection mode. In this way, under the lens switching control system provided in the present application, only one set of light sources is required to switch different lens modules according to different preset projection modes required to achieve switching between different preset projection modes; that is, without the need for multiple sets of light sources, only one set of light sources is required to achieve multiple projection modes, effectively solving the problem of excessive cost of the projection system. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0008] Figure 1 A system schematic diagram of a control device for lens switching provided by an embodiment of the present application is shown.

[0009] Figure 2 A schematic diagram showing the position of a baffle provided in an embodiment of the present application is shown.

[0010] Figure 3 A schematic structural diagram of a motion component provided in an embodiment of the present application is shown.

[0011] Figure 4 A system schematic diagram of a control device for lens switching provided by another embodiment of the present application is shown.

[0012] Figure 5 A module schematic diagram of a position indication module provided in an embodiment of the present application is shown.

[0013] Figure 6 A schematic diagram showing the position of another baffle provided in an embodiment of the present application is shown.

[0014] Figure 7 A circuit diagram of a driving module provided in an embodiment of the present application is shown.

[0015] Figure 8 A circuit diagram of a sensor provided in an embodiment of the present application is shown.

[0016] Figure 9 A circuit diagram of an operational amplifier comparator provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0017] In order 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 in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0018] It should be noted that in some of the processes described in the specification, claims and the above-mentioned figures of this application, multiple operations that appear in a specific order are included, and these operations may not be executed in the order in which they appear in this document or may be executed in parallel. The sequence numbers of the operations, such as S110, S120, etc., are merely used to distinguish between different operations, and the sequence numbers themselves do not represent any order of execution. In addition, these processes may include more or fewer operations, and these operations may be executed in sequence or in parallel. Also, the terms "first", "second", etc. in the specification, claims and the above-mentioned figures of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or server that includes a series of steps or sub-modules is not necessarily limited to those steps or sub-modules explicitly listed, but may include other steps or sub-modules not explicitly listed or inherent to such process, method, product, or device.

[0019] The inventor proposes a control device for lens switching and a projection system. The control device for lens switching provided by an embodiment of the present application is described in detail below.

[0020] Please refer to Figure 1 , Figure 1 This is a system diagram of a control device for lens switching provided in one embodiment of the present application. Figure 1 The control device for lens switching provided in an embodiment of the present application is described in detail.

[0021] In this embodiment, the control device 10 for lens switching includes a motion component 110 , a driving module 120 , a main control module 130 and a plurality of position indication modules 140 .

[0022] Optionally, the motion assembly 110 includes at least a motion platform 111, the motion platform 111 being used to place a plurality of lens modules 210, the plurality of lens modules 210 corresponding to a plurality of preset projection modes, and different lens modules 210 being arranged at different positions on the motion platform 111. The number of the plurality of lens modules 210 is not limited to Figure 1 4 of them, the number of which can be adjusted according to the actual number of projection modes; for example, if the projection system needs to realize projection of N preset projection modes, N lens modules 210 can be correspondingly set on the motion platform 111, where N is a positive integer greater than 1.

[0023] The driving module 120 is electrically connected to the motion component 110 .

[0024] Multiple position indication modules 140, each of the position indication modules 140 includes a detection unit 141 and a position indication unit 142, the multiple position indication modules 140 correspond one-to-one to the multiple preset projection modes, the position indication unit 142 is electrically connected to the detection unit 141, and the position indication unit 142 is used to generate a position indication signal according to the output signal of the detection unit 141, and output the position indication signal to the main control module 130.

[0025] The main control module 130 is electrically connected to the driving module 120 and the position indication module 140 respectively. The main control module 130 can also be understood as a controller, which is generally a code logic embedded chip. The main control module 130 is used to continuously output a target driving signal to the driving module 120 according to the target position indication signal after receiving the target projection mode instruction, so as to drive the motion platform 111 to move until the target lens module moves to the optical path where the light beam output by the light source is located. The target projection mode is any preset projection mode among multiple preset projection modes, and the target lens module is a lens module corresponding to the target projection mode among multiple lens modules 210. The target position indication signal is the position indication signal output by the position indication module corresponding to the target projection mode. It should be noted that the light source is not in Figure 1 As shown in Figure 1 The area enclosed by the dashed box 310 in the figure can be understood as the cross-sectional area of the optical path of the light beam output by the light source. If the target lens module overlaps with the dashed box 310, it can be considered that the target lens module has moved to the optical path of the light beam output by the light source, that is, the target lens module and the light output point of the alignment light source.

[0026] That is to say, by only using the control device 10 for lens switching provided by the present application, a set of light sources and multiple lens modules, a projection system capable of randomly switching between multiple projection modes can be produced at a relatively low cost.

[0027] In some embodiments, see Figure 1 In addition to the motion platform 111, the motion assembly 110 may also include a motor 112, a nut 113, a screw 114, and a spring body 115, as well as Figure 2 As shown, the control device 10 for lens switching further includes a base 150. The motion assembly 110 is movably mounted on the base 150. Specifically, the motion platform 111, the motor 112, the nut 113, the screw 114, and the spring 115 are all movably mounted on the base 150. Furthermore, a baffle 116 is fixedly mounted on the motion platform 111, and a plurality of the detection units are fixedly mounted on the base. The input end of the motor 112 is connected to the Figure 1 The driving module 120 is electrically connected, and the output shaft of the motor 112 is fixedly connected to one end of the screw 114; the screw 114 is arranged on the inner side of the nut 113, and the outer side of the nut 113 is fixedly provided with a motion platform 111, and both ends of the nut 113 are provided with a spring body 115.

[0028] In this mode, after receiving the target projection mode command, the main control module 130 continuously outputs a target drive signal to the drive module 120 based on the target position indication signal. The drive module 120 then rotates the drive motor 112 in response to the target drive signal, thereby driving the screw 114 to rotate, causing the nut 113 to drive the motion platform 111 to move horizontally. This in turn causes the target lens module, which is fixed to the motion platform 111, to move until it overlaps with the dotted line frame 310, i.e., to move the target lens module into the optical path of the light beam output by the light source. Of course, the baffle 116 on the motion platform 111 also moves accordingly.

[0029] For example, if Figure 1 The preset projection mode corresponding to the hexagonal lens module 210 is the high beam mode. Figure 1 The preset projection mode corresponding to the rectangular lens module 210 in the image is the movie mode; at the current moment, the projection system is Figure 1 In the high beam mode shown, if the high beam mode needs to be switched to the movie mode, that is, the movie mode is activated, the main control module 130 can continuously output the target driving signal to the driving module 120, and the driving module 120 can rotate the corresponding driving motor 112 according to the target driving signal, thereby driving the screw 114 to rotate together, so that the nut 113 drives the motion platform 111 to move horizontally, and then Figure 3 As shown, the rectangular lens module 210 fixed on the motion platform 111 is moved to overlap with the dotted frame 310, that is, the rectangular lens module 210 is moved to the optical path of the light beam output by the light source. In this way, the projection mode of the projection system can be quickly switched from high beam mode to movie mode.

[0030] In this embodiment, a control device for lens switching is used, and only one set of light sources is needed to switch different lens modules according to different preset projection modes required to achieve switching between different preset projection modes; that is, there is no need for multiple sets of light sources, and only one set of light sources is needed to achieve multiple projection modes, which effectively solves the problem of excessively high costs of projection systems.

[0031] Please refer to Figure 4 , Figure 4 This is a system diagram of a control device for lens switching provided in another embodiment of the present application. Figure 4 The control device for lens switching provided in an embodiment of the present application is described in detail.

[0032] In this embodiment, the control device 10 for lens switching includes a motion assembly 110, a drive module 120, a main control module 130, a plurality of position indication modules 140, and a power supply module 160. The power supply module 160 is connected to the main control module 130 to supply power to the main control module 130. The main control module 130 is electrically connected to the drive module 120, which is in turn electrically connected to the motion assembly 110. The output end of each position indication module 140 is connected to the main control module 130.

[0033] Optionally, the motion assembly 110 may include a motion platform 111, a motor 112, a nut 113, a screw 114, a spring 115, and a baffle 116. The control device 10 for lens switching further includes a base 150, wherein the motion platform 111, motor 112, nut 113, screw 114, and spring 115 are all disposed on the base 150. The input end of the motor 112 is electrically connected to the drive module 120, and the output shaft of the motor 112 is fixedly connected to one end of the screw 114. The screw 114 is disposed through the inner side of the nut 113, and the motion platform 111 is fixedly disposed on the outer side of the nut 113. The spring 115 is disposed at both ends of the nut 113. The motion platform 111 can be used to accommodate multiple lens modules 210. The multiple lens modules 210 correspond to multiple preset projection modes, and different lens modules 210 are disposed at different positions on the motion platform 111.

[0034] In this embodiment, the output end of each position indication module 140 is used to output a position indication signal to the main control module 130. This position indication signal is a first level signal or a second level signal. The first level signal indicates that the baffle has been detected, and the second level signal indicates that the baffle has not been detected. Multiple baffle detection modules correspond one-to-one to multiple preset projection modes. The first level signal and the second level signal are different. It should be noted that when any lens module 210 is within the optical path of the light beam output by the light source, the position indication module 140 corresponding to that lens module 210 is able to detect the baffle 116. In this way, whether multiple position indication modules 140 detect the baffle 116 can be used to determine which lens module 210 is currently within the optical path of the light beam output by the light source, thereby quickly determining which preset projection mode the projection system is currently in.

[0035] First, after receiving the target projection mode command, the main control module 130 can determine the current target position of the baffle 116 based on the multiple position indication signals received at the current moment. These multiple position indication signals correspond one-to-one with the multiple position indication modules 140. Based on the current position of the baffle 116 and the position of the target position indication module 140, the main control module 130 determines the target rotation direction of the motor 112 and continuously outputs a target drive signal that matches the target rotation direction to drive the motion platform 111 until the target lens module moves into the optical path of the light beam output by the light source.

[0036] Based on this, specifically, after receiving the target projection mode instruction, the main control module 130 continuously outputs the target drive signal to the driving module 120 according to the target position indication signal. If the first level signal is input by the target position indication module 140 within a first preset time period after startup, the main control module 130 continuously outputs the target drive signal to the driving module 120 for a second preset time period after the current moment to compress the spring body 115 to fix the target lens assembly. The target position indication module is a position indication module corresponding to the target projection mode. In other words, after receiving the target projection mode instruction, the main control module 130 continuously outputs the target drive signal to the driving module 120. If the target position indication module 140 corresponding to the target projection mode detects the baffle 116 within the first preset time period after startup, it indicates that the target lens assembly has moved to the optical path of the light beam output by the light source. However, considering that there is no internal stress when the spring body 115 is not compressed, and the target lens module is not fixed at this time, the target lens module is in an active state under conditions such as vibration; therefore, the target drive signal is continuously output to the drive module 120 within a second preset time after the current moment to compress the spring body 115 to fix the target lens group; it should be noted that within the second preset time, although the nut will continue to move, it only compresses the spring body 115, and the position of the target lens group does not change, that is, within the second preset time, the target lens group does not move in the horizontal direction.

[0037] Among them, the first preset time length and the second preset time length are both preset time length values, and the second preset time length is less than the first preset time length; of course, the first preset time length and the second preset time length can also be adjusted according to different actual needs. For example, the first preset time length can be 3 seconds, and the second preset time length can be 200 milliseconds. The first preset time length can be understood as the maximum time length threshold allowed for lens module switching set by the control device 10 for lens switching of the present application to protect the motor; in other words, when there is no abnormality in the motion component 110, within the first preset time length, the motor can be driven to rotate to drive the motion platform 111 to move, so that the target lens module moves to the optical path where the light beam output by the light source is located.

[0038] Optionally, after receiving the target projection mode instruction and continuously outputting the target drive signal to the driving module 120, if the target position indication module 140 receives no second level signal within a first preset time period, the main control module 130 outputs a prompt message and a drive stop signal to the driving module 120, wherein the prompt message is used to indicate that there is an abnormality in the motor or the motion component. In other words, after the main control module 130 activates the target projection mode and continuously outputs the target drive signal to the driving module 120, if the target position indication module 140 corresponding to the target projection mode does not detect the baffle 116 within the first preset time period after activation, it indicates that the target lens module has not moved to the optical path of the light beam output by the light source.

[0039] In some embodiments, see Figure 5 Each position indicating module 140 includes a detection unit 141 and a position indicating unit 142. The detection unit 141 is a sensor, and the position indicating unit 142 is an operational amplifier comparator. The detection units 141 are arranged at different positions in different baffle detection modules 150. The first input end of the position indicating unit 142 is connected to the output end of the detection unit 141, and the output end 1421 of the position indicating unit 142 is connected to the output end of the position indicating module 140. For example, if the motion component 110 only includes two position indicating modules 140, such as Figure 5 As shown, two detection units 141 are arranged at different positions in the motion component 110. The second input terminal of the position indicating unit 142 is used to input a reference voltage, and the output terminal of the detection unit 141 is used to output a detection voltage.

[0040] In this manner, the output terminal of the position indicating unit 142 is used to output the second level signal when the detection voltage is greater than the reference voltage; and the output terminal of the position indicating unit 142 is used to output the first level signal when the detection voltage is less than the reference voltage. The first level signal is a low level signal, and the second level signal is a high level signal.

[0041] Optionally, if the acquisition end of any detection unit 141 detects the baffle, it outputs a first voltage value; if the acquisition end of any detection unit 141 does not detect the baffle, it outputs a second voltage value, which is greater than the first voltage value. The sensor is a PI sensor with an integrated transmitter and receiver. When the acquisition end of the detection unit 141 is blocked by the baffle 116, the current generated by the receiving end will be relatively small, so that a lower voltage value (i.e., the aforementioned first voltage value) will be output at the output end of the detection unit 141. When the acquisition end of the detection unit 141 is not blocked by the baffle 116, the current at the receiving end of the detection unit 141 is relatively large, and a higher voltage value (i.e., the aforementioned second voltage value) will be output. It should be noted that the first voltage value output by the detection unit 141 is negatively correlated with the area of the collection end of the detection unit 141 blocked by the baffle 116. That is, when the baffle 116 moves with the motion platform, the first voltage value output when it only blocks a part of the collection end of a certain detection unit 141 is different from the first voltage value output when the collection end of a certain detection unit 141 is completely blocked, and the first voltage value generated by the former is greater than the first voltage value generated by the latter.

[0042] For example, if the current baffle 116 moves to Figure 2 At the detection unit 141 on the left, at this time, the collection end of the detection unit 141 on the left will be blocked by the baffle 116, which outputs a lower first voltage value to the position indicating unit 142, so that the position indicating unit 142 outputs a low level signal to the main control module 130; and Figure 5 If the acquisition end of the detection unit 141 on the right is not blocked by the baffle 116, it will output a higher second voltage value to the position indication unit 142, so that the position indication unit 142 will output a high level signal to the main control module 130. Figure 6 At the detection unit 141 on the right side shown in the figure, at this time, the collection end of the detection unit 141 on the right side will be blocked by the baffle 116, which outputs a lower first voltage value to the position indicating unit 142, so that the position indicating unit 142 outputs a low level signal to the main control module 130; and Figure 6 If the collection end of the detection unit 141 on the left is not blocked by the baffle 116 , it will output a higher second voltage value to the position indication unit 142 , and thus the position indication unit 142 will output a high-level signal to the main control module 130 .

[0043] That is, when the acquisition end of the target sensor in the target baffle detection module is blocked by the baffle 116, the detection voltage output by the target sensor to the position indication unit 142 is relatively small, and thus the position indication unit 142 outputs a low-level signal to the main control module 130. The main control module 130, through the input low-level signal, can indirectly determine that the target lens module has moved to the optical path of the light beam output by the light source by determining that the baffle 116 has moved to the target sensor. Thus, the main control module 130 can continuously output the target drive signal to the drive module 120 for a second preset time period after the current moment, thereby compressing the spring body 115 to fix the target lens assembly. In this way, a high-precision position sensor is no longer required to detect the position of the baffle. Instead, the position of the baffle is detected through high and low-level signals, which greatly reduces costs to a certain extent.

[0044] In some embodiments, the main control module 130 can be a S32K312NHTOMPAST chip, which can be used as a vehicle embedded chip and has CAN (Controller Area Network) communication. The switching of the lens module in this application can be controlled based on CAN communication. The driving module 120 can use an A4950E motor driving chip. The internal circuit diagram of the driving module 120 can be as follows: Figure 8 As shown, D67 and D66 are transient voltage suppressor diodes (TVS diodes) used to protect the pins of the motor driver chip from being damaged by the spike voltage generated by the coil; and Figure 7 The magnetic beads and capacitors are used to filter the noise in the circuit to reduce the electromagnetic interference (EMI) to the overall circuit of the driving module 120. The position indicating unit 142 can be used as Figure 9 In the LM2903 chip shown, each LM2903 chip includes two operational amplifier comparators, that is, one position indication module 140 uses one operational amplifier comparator.

[0045] The internal circuit diagram of the detection unit 141 can be as follows Figure 8 As shown, similarly, Figure 8 D5 and D6 are TVS diodes used to protect the pins from being damaged by the spike voltage generated by the coil; and Figure 9 The magnetic beads and capacitors are also used to filter noise in the circuit to reduce EMI interference to the internal circuit of the detection unit 141. Figure 8The pins Covered Right SWITCHOUT and Covered Left SWITCH OUT (corresponding to the output terminals of the aforementioned operational amplifier comparator) are both connected to the input terminals of the main control module 130 and connected to the controller. Figure 8 The pins ComL+ and ComR+ (corresponding to the second input terminal of the aforementioned op amp comparator) in the LM2903 chip are used to input a reference voltage. The reference voltage is divided into 1.65V by a resistor 10k and compared with the Covered Left pin and the Covered Right pin. When the voltage input to the Covered Left pin or the Covered Right pin (corresponding to the first input terminal of the aforementioned op amp comparator) is greater than the reference voltage 1.65V, the pin Covered Left SWITCHOUT or the pin Covered Right SWITCH OUT outputs a high-level signal to the main control module 130. Otherwise, a low-level signal is input to the main control module 130. When the detection unit 141 is blocked by the baffle 116, Figure 8 The output voltage of the middle pin Covered Right is about 0.3V; when the detection unit 141 is not blocked by the baffle 116, Figure 8 The output voltage of the Covered Right pin is approximately 2V.

[0046] In this mode, the first output port of the main control module 130 is connected to the first input port of the driving module 120, and the second output port of the main control module 130 is connected to the second input port of the driving module 120; the first output port of the driving module 130 is connected to the first input port of the motor 112, and the second output port of the driving module 130 is connected to the second input port of the motor 112. Based on this, the main control module 130 outputs the target drive signal to the driving module 120 through Moto IN1 (i.e., the first input port of the driving module 120) and Moto IN2 (i.e., the second input port of the driving module 120) to control the forward and reverse rotation of the motor 112. When Moto IN1 and Moto IN2 are both low-level signals, Figure 7 OUT1 (ie, the first output port of the driving module 130 ) and OUT2 (ie, the second output port of the driving module 130 ) are in a high impedance state, which is equivalent to a disconnected state. At this time, the motor 112 stops rotating. Figure 7 OUT1 and OUT2 in the J4 port are connected to the first input port and the second input port of the DC motor.

[0047] In this manner, the target driving signal may include a first driving level signal input to a first input terminal of the driving module 120, and a second driving level signal input to a second input terminal of the driving module 120. The driving module 120 is configured to drive the motor 112 to stop rotating when both the first driving level signal and the second driving level signal are low level signals; the driving module 120 is configured to drive the motor 112 to rotate forward when the first driving level signal is a high level signal and the second driving level signal is a low level signal, thereby driving the screw 114 to rotate forward, thereby moving the nut 115 in a first direction and the motion platform 111 fixed to the outside of the nut 115 in the first direction; and the driving module 120 is configured to drive the motor 112 to rotate reversely when the first driving level signal is a low level signal and the second driving level signal is a high level signal, thereby driving the screw 114 to rotate reversely, thereby moving the nut 115 in a second direction and the motion platform 111 fixed to the outside of the nut 115 in the second direction, wherein the second direction is opposite to the first direction. It should be noted that the forward rotation and the reverse rotation of the motor are two opposite directions of rotation. The specific direction of rotation as the forward rotation can be set according to actual conditions, and this embodiment does not impose any limitation on this.

[0048] For example, when Motor IN1 is a high level signal and Motor IN2 is a low level signal, the motor rotates forward to control the baffle 116 to move to Figure 6 At the detection unit 141 on the right, the detection unit 141 on the right will output a lower first voltage value to the position indication unit 142, so that the position indication unit 142 outputs a low-level signal to the main control module 130. The main control module 130 determines that the baffle 116 has moved to the detection unit 141 on the left (i.e., the target sensor) through the received low-level signal, to indirectly determine that the target lens module (i.e., the lens module corresponding to the high beam mode) has moved to the optical path where the light beam output by the light source is located, and continuously outputs the target drive signal to the drive module 120 within a second preset time length (e.g., 200 milliseconds) after the current moment, that is, wait for 200ms and then control the motor to stop rotating, so as to compress the spring body 115 to fix the target lens group.

[0049] Optionally, when Motor IN1 is a low level signal and Motor IN2 is a high level signal, the motor is reversed to control the baffle 116 to move to Figure 2At the detection unit 141 on the left, the detection unit 141 on the left will output a lower first voltage value to the position indicating unit 142, so that the position indicating unit 142 outputs a low-level signal to the main control module 130. The main control module 130 determines that the baffle 116 has moved to the detection unit 141 on the left (i.e., the target sensor) through the received low-level signal, to indirectly determine that the target lens module (i.e., the lens module corresponding to the movie mode or the light carpet mode) has moved to the optical path where the light beam output by the light source is located, and continuously outputs the target drive signal to the drive module 120 within a second preset time length (e.g., 200 milliseconds) after the current moment, that is, wait for 200ms and then control the motor to stop rotating, so as to compress the spring body 115 to fix the target lens group.

[0050] In this embodiment, under the lens switching control system provided in the present application, only one set of light sources is needed to realize different preset projection modes according to the requirements, and different lens modules are switched to realize switching of different preset projection modes; that is, there is no need for multiple sets of light sources, only one set of light source is needed to realize multiple projection modes, which effectively solves the problem of high cost of the projection system.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A control device for lens switching, characterized in that: The control device comprises: A motion assembly, the motion assembly comprising at least a motion platform, the motion platform being used to place a plurality of lens modules, the plurality of lens modules corresponding one-to-one to a plurality of preset projection modes, and different lens modules being arranged at different positions on the motion platform; a driving module, electrically connected to the motion component; a plurality of position indication modules, each comprising a detection unit and a position indication unit, the plurality of position indication modules corresponding one-to-one to the plurality of preset projection modes, the position indication unit being electrically connected to the detection unit, the position indication unit being configured to generate a position indication signal according to an output signal of the detection unit, and outputting the position indication signal to a main control module; A main control module is electrically connected to the driving module and the position indication module, respectively, and is used to continuously output a target driving signal to the driving module according to a target position indication signal after receiving a target projection mode instruction, so as to drive the motion platform to move until the target lens module moves to the optical path where the light beam output by the light source is located, wherein the target projection mode is any preset projection mode among the multiple preset projection modes, the target lens module is a lens module among the multiple lens modules corresponding to the target projection mode, and the target position indication signal is a position indication signal output by the position indication module corresponding to the target projection mode.

2. The control device for lens switching according to claim 1, characterized in that: The motion assembly includes a motor, a nut, a screw and a spring body; The input end of the motor is electrically connected to the driving module, and the output shaft of the motor is fixedly connected to one end of the screw; The screw is disposed through the inner side of the nut; The outer side of the nut is fixedly provided with the moving platform, and both ends of the nut are provided with the spring bodies.

3. The control device for lens switching according to claim 2, characterized in that: The control device for lens switching further comprises a base, the motion assembly is movably disposed on the base, a baffle is fixedly disposed on the motion platform, and the plurality of detection units are fixedly disposed on the base; The driving module drives the motor to rotate based on the target driving signal, and drives the screw to rotate, so that the nut moves, and drives the motion platform fixed on the outside of the nut to move.

4. The control device for lens switching according to claim 3, characterized in that: The detection unit is a sensor, the position indication unit is an operational amplifier comparator, the sensors in different position indication modules are arranged at different positions, the first input end of the operational amplifier comparator is connected to the output end of the sensor, the output end of the operational amplifier comparator is connected to the input end of the main control module, the second input end of the operational amplifier comparator is used to input a reference voltage, the output end of the sensor is used to output a detection voltage, and the position indication signal is a first level signal or a second level signal; The output terminal of the operational amplifier comparator is used to output the second level signal when the detection voltage is greater than the reference voltage; The output terminal of the operational amplifier comparator is used to output the first level signal when the detection voltage is lower than the reference voltage.

5. The control device for lens switching according to claim 4, characterized in that: When the acquisition end of any of the sensors detects the baffle, it outputs a first voltage value; If the acquisition end of any of the sensors does not detect the baffle, a second voltage value is output, and the second voltage value is greater than the first voltage value.

6. The control device for lens switching according to claim 4, characterized in that: After receiving the target projection mode instruction, the main control module continuously outputs the target driving signal to the driving module according to the target position indication signal. If the first level signal is received from the target position indication module within a first preset time after startup, the main control module continuously outputs the target driving signal to the driving module within a second preset time after the current moment to compress the spring body to fix the target lens module, wherein the second preset time is shorter than the first preset time. The target position indication module is a position indication module corresponding to the target projection mode. After receiving the target projection mode instruction, the main control module continuously outputs the target driving signal to the driving module according to the target position indication signal. If the second level signal input by the target position indication module is not received within the first preset time period, the main control module outputs a prompt message and outputs a drive stop signal to the driving module, and the prompt message is used to indicate that there is an abnormality in the motor or the motion component.

7. The control device for lens switching according to claim 3, characterized in that: After starting the target projection mode, the main control module determines the current target position of the baffle according to the multiple position indication signals received at the current moment, wherein the multiple position indication signals correspond one-to-one to the multiple position indication modules; The main control module determines the target rotation direction of the motor based on the current position of the baffle and the position of the target position indication module, and continuously outputs the target drive signal matching the target rotation direction to drive the motion platform to move until the target lens module moves to the optical path of the light beam output by the light source.

8. The control device for lens switching according to claim 2, characterized in that: The control device for lens switching further includes a power module, which is connected to the main control module and supplies power to the main control module; The first output port of the main control module is connected to the first input port of the driving module, and the second output port of the main control module is connected to the second input port of the driving module; The first output port of the driving module is connected to the first input port of the motor, and the second output port of the driving module is connected to the second input port of the motor.

9. The control device for lens switching according to claim 8, characterized in that: The target driving signal includes a first driving level signal input to the first input terminal, and a second driving level signal input to the second input terminal; The driving module is configured to drive the motor to stop rotating when the first driving level signal and the second driving level signal are both low level signals; The driving module is configured to drive the motor to rotate forward and drive the screw to rotate forward when the first driving level signal is a high-level signal and the second driving level signal is a low-level signal, so as to move the nut in a first direction and drive the motion platform fixed outside the nut to move in the first direction; The driving module is used to drive the motor to reverse and drive the screw to reverse when the first driving level signal is a low level signal and the second driving level signal is a high level signal, so that the nut moves in a second direction and drives the motion platform fixed on the outside of the nut to move in the second direction, and the second direction is opposite to the first direction.

10. A projection system, characterized in that: The projection system includes a light source, a plurality of lens modules, and a control device for lens switching according to any one of claims 1 to 9.

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