Control circuit, method, apparatus and system for flip instrument

Abstract

The present application discloses a control circuit, method, apparatus and system for a flip instrument. The control circuit comprises a controller, and a driving circuit and a limiting circuit connected to the controller; the driving circuit is used for receiving a first control signal, so that a driving mechanism drives a second display screen to move along a straight line segment and an arc segment of a first guide rail; the limiting circuit is used for generating a limiting signal when the second display screen moves to a limiting position; the controller is used for sending the first control signal to the driving circuit, and sending a second control signal to the driving circuit on the basis of the limiting signal, so that the driving circuit receives the second control signal and stops driving the second display screen. According to the technical solution provided by the present application, a display screen assembly can be controlled to perform multi-dimensional switching combining linear motion and rotational motion, improving the comfort and the sense of science and technology of screen switching.

Description

Control circuit, method, device and system for flip meter Technical Field

[0001] The present application belongs to the field of instrument control technology, and in particular relates to a control circuit, method, device and system for a flip instrument. Background Art

[0002] At present, the integration of vehicle intelligence and fun has become the development trend of smart cockpits. The different modes of vehicle multi-display instruments can meet the needs of users in different scenarios, and are therefore deeply loved by users.

[0003] In the prior art, under the layout of the display screen assembly shown in FIG1 , the corresponding instrument control method can only control the large and small display screens to perform simple flip switching, resulting in a relatively mechanical screen switching effect and a poor user experience.

[0004] Summary of the Invention

[0005] The embodiments of the present application provide a control circuit, method, device and system for a flip instrument, which can, at least to a certain extent, control the display screen assembly to perform multi-dimensional switching combining linear motion and rotational motion, thereby improving the comfort and sense of technology of screen switching and enhancing the user experience.

[0006] Other features and advantages of the present application will become apparent from the following detailed description, or may be learned in part by practice of the present application.

[0007] According to a first aspect of an embodiment of the present application, a control circuit for a flip instrument is provided. The flip instrument includes a housing, a display assembly, and a drive assembly. The display assembly includes a first display and a second display that are not simultaneously housed in the housing. The drive assembly includes a first guide rail and a drive mechanism. The control circuit includes a controller, a drive circuit, and a limit circuit connected to the controller.

[0008] The driving circuit is configured to receive a first control signal so as to enable the driving mechanism to drive the second display screen to move along the straight line segment and the arc segment of the first guide rail;

[0009] The limit circuit is configured to generate a limit signal when the second display screen moves to a limit position;

[0010] The controller is configured to send the first control signal to the driving circuit, and send a second control signal to the driving circuit according to the limit signal, so that the driving circuit receives the second control signal and stops driving the second display screen.

[0011] In some embodiments of the present application, based on the aforementioned solution, the driving circuit includes a driving motor.

[0012] In some embodiments of the present application, based on the aforementioned solution, the limit circuit includes an extension limit switch SW1 and a retraction limit switch SW2;

[0013] The extension limit switch SW1 is configured to generate a first limit signal when the second display screen extends out of the housing and moves to a first limit position;

[0014] The retraction limit switch SW2 is configured to generate a second limit signal when the second display screen is retracted into the housing and moves to a second limit position.

[0015] In some embodiments of the present application, based on the aforementioned solution, it further includes a power supply switching circuit connected to the controller;

[0016] The power supply switching circuit is configured to switch the power supply of the first display screen or the second display screen according to a third control signal of the controller when the second display screen moves to the power supply switching position.

[0017] In some embodiments of the present application, based on the aforementioned scheme, the power supply switching circuit includes a limit switch SW3 and a relay, the limit switch SW3 is connected to the relay, and the relay is respectively connected to the display circuit of the first display screen and the display circuit of the second display screen.

[0018] In some embodiments of the present application, based on the aforementioned solution, a reset circuit connected to the controller is further included, and the reset circuit includes an extended reset button K1 and a retracted reset button K2.

[0019] According to a second aspect of an embodiment of the present application, a method for controlling a flip instrument is provided. The method is executed by a controller and includes:

[0020] Sending a first control signal to the driving circuit so that the driving circuit receives the first control signal, thereby causing the driving mechanism to drive the second display screen to move along the straight line segment and the arc segment of the first guide rail;

[0021] The limit signal sent by the limit circuit is received, and a second control signal is sent to the driving circuit according to the limit signal, so that the driving circuit receives the second control signal and stops driving the second display screen to move.

[0022] According to a third aspect of an embodiment of the present application, a control device for a flip instrument is provided, the device being provided in a controller and comprising:

[0023] a first signal sending module configured to send a first control signal to the driving circuit, so that the driving circuit receives the first control signal, thereby causing the driving mechanism to drive the second display screen to move along the straight line segment and the arc segment of the first guide rail;

[0024] The second signal sending module is configured to receive the limit signal sent by the limit circuit and send a second control signal to the driving circuit according to the limit signal, so that the driving circuit receives the second control signal and stops driving the second display screen to move.

[0025] According to the fourth aspect of an embodiment of the present application, a control system for a flip instrument is provided, comprising a control circuit as described in any one of the first aspects above, and also comprising a central control device connected to the controller, wherein the central control device is at least configured to send a mode switching instruction to the controller so that the controller switches the working mode of the first display screen or the second display screen according to the mode switching instruction.

[0026] In some embodiments of the present application, based on the aforementioned solution, a remote controller is further included, and the remote controller is connected to the controller.

[0027] According to a fifth aspect of an embodiment of the present application, a vehicle is provided, comprising a control system as described in any one of the fourth aspects above.

[0028] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application.

[0029] According to the control circuit of the flip instrument provided in one or more embodiments of the present application, the driving circuit is controlled by the controller so that the driving mechanism drives the second display screen to move along the straight segments and arc segments of the first guide rail, and the second display screen is limited to a preset position by the limit signal of the limit circuit, thereby realizing multi-dimensional switching control between the second display screen and the first display screen, improving the comfort and sense of technology of screen switching, and enhancing the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings are incorporated into and constitute a part of the specification, illustrating embodiments consistent with the present application and, together with the specification, explaining the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can derive other drawings based on these drawings without inventive effort. In the drawings:

[0031] FIG1 shows a schematic diagram of the layout of large and small display screens in the prior art;

[0032] FIG2 shows an exploded view of a flip meter in an embodiment of the present application;

[0033] FIG3 is a schematic diagram showing a working state of the first display screen in an embodiment of the present application;

[0034] FIG4 is a schematic diagram showing a working state of the second display screen in an embodiment of the present application;

[0035] FIG5 shows a schematic diagram of a control circuit of a flip meter in an embodiment of the present application;

[0036] FIG6 shows a flow chart of a method for controlling a flip instrument in an embodiment of the present application;

[0037] FIG7 shows a structural diagram of a control device for a flip instrument in an embodiment of the present application;

[0038] FIG8 shows a structural diagram of a control system of a flip meter in an embodiment of the present application.

[0039] Description of reference numerals:

[0040] 1-housing; 2-display screen assembly; 21-first display screen; 22-second display screen; 3-drive assembly; 31-first guide rail; 311-straight segment; 312-arc segment; 312A-first arc segment; 312B-second arc segment; 32-drive mechanism; 321-drive motor; 322-gear; 4-rotation limit assembly; 421-rotation center. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0042] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner.In the following description, many specific details are provided so as to provide a full understanding of the embodiments of the present application. However, it will be appreciated by those skilled in the art that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps etc. can be adopted. In other cases, known methods, devices, implementations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0043] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically separate entities. That is, these functional entities may be implemented in software, in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0044] The flowcharts shown in the accompanying drawings are for illustrative purposes only and do not necessarily include all contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps may be decomposed, while others may be combined or partially combined. Therefore, the actual execution order may vary depending on the actual situation.

[0045] It should also be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that shown or described.

[0046] The control circuit of the flip meter provided in the first aspect of the embodiment of the present application is described in detail below with reference to FIG. 2 to FIG. 5 .

[0047] See Figure 2, which shows an exploded view of the flip instrument in an embodiment of the present application; see Figure 3, which shows a schematic diagram of the working state of the first display screen in an embodiment of the present application; see Figure 4, which shows a schematic diagram of the working state of the second display screen in an embodiment of the present application.

[0048] It should be noted that the control circuit in the embodiment of the present application is used to control the flip instrument shown in Figures 2 to 4, specifically to control the first display screen and the second display screen of the instrument to switch the working status.

[0049] As shown in Figures 2 to 4, the flip instrument includes: a housing 1; a display assembly 2, which includes at least a first display 21 and a second display 22 that are not simultaneously housed in the housing 1, the first display 21 and the second display 22 being connected to form a bent structure; a drive assembly 3, which includes a first guide rail 31 and a drive mechanism 32, the first guide rail 31 including at least a continuous straight line segment 311 and an arc segment 312, the drive mechanism 32 being fixedly connected to the second display 22, and the drive mechanism 32 driving the second display 22 when moving along the straight line segment 311 and the arc segment 312. The second display screen 22 performs linear motion and rotational motion respectively; the rotation limit component 4 is connected to the second display screen 22, and the rotation limit component 4 has a first limit position and a second limit position; wherein, the display screen component 2 is driven by the driving component 3 to perform rotational motion around the rotation center 421 of the rotation limit component 4 between the first limit position and the second limit position, when the display screen component 2 is located at the first limit position, the first display screen 21 is located at the preset position, and when the display screen component 2 is located at the second limit position, the second display screen 22 is located at the preset position.

[0050] Preferably, the preset position is the position of the first display screen 21 or the second display screen 22 in the working state. In the embodiment of the present application, the preset position is defined as a display position. The preset position of the first display screen 21 and the preset position of the second display screen 22 can be the same or different, and are preferably the same.

[0051] It should be noted that the connection of the first display screen 21 and the second display screen 22 to form a curved structure means that one side of the first display screen 21 is connected to one side of the second display screen 22, and after the connection, an angle is formed between the two displays to form the curved structure. Preferably, the angle between the first display screen 21 and the second display screen 22 can be 70 degrees to 90 degrees, for example, 75 degrees, 78 degrees, 80 degrees, etc., so that the display screen assembly 2 forms a curved structure that is approximately "L"-shaped or equal to "L".

[0052] In the embodiment of the present application, the size of the second display screen 22 is larger than that of the first display screen 21. For example, in the approximately "L"-shaped bending structure shown in Figures 2 to 4, the width of the second display screen 22 is larger than the width of the first display screen 21, and the length of the first display screen 21 is the same as the length of the second display screen 22. In the following, the second display screen 22 is referred to as the large screen and the first display screen 21 is referred to as the small screen, which will not be repeated below.

[0053] 5 , which shows a schematic diagram of a control circuit of a flip meter in an embodiment of the present application.

[0054] As shown in FIG5 , based on the structure of the above-mentioned flip meter, in order to realize the switching control of the large screen and small screen working states, a control circuit of the flip meter is proposed. The control circuit includes a controller, and a drive circuit and a limit circuit connected to the controller;

[0055] The driving circuit is configured to receive a first control signal so that the driving mechanism 32 drives the second display screen 22 to move along the straight line segment 311 and the arc segment 312 of the first guide rail 31;

[0056] The limit circuit is configured to generate a limit signal when the second display screen 22 moves to the limit position;

[0057] The controller is configured to send the first control signal to the driving circuit, and send a second control signal to the driving circuit according to the limit signal, so that the driving circuit receives the second control signal and stops driving the second display screen 22 .

[0058] In some embodiments, the drive mechanism 32 includes a drive motor 321 connected to the second display screen 22 and a gear 322 connected to the output shaft of the drive motor 321; the straight segment 311 and the arc segment 312 of the first guide rail 31 are configured as guide racks, which mesh with the gear 322. Preferably, the drive motor 321 is a uniform speed motor to drive the gear 322 to move at a uniform speed along the first guide rail 31, thereby ensuring that the display screen assembly 2 remains stable during movement. In this embodiment of the present application, two drive motors 321 are provided, each driving two gears 322 to cause the second display screen 22 to perform linear and rotational motion.

[0059] In some embodiments, the limit circuit includes an extension limit switch SW1 and a retraction limit switch SW2; the extension limit switch SW1 is configured to generate a first limit signal when the second display screen 22 is extended from the shell 1 and moves to a first limit position; the retraction limit switch SW2 is configured to generate a second limit signal when the second display screen 22 is retracted from the shell 1 and moves to a second limit position.

[0060] In some embodiments, the extension limit switch SW1 and the retraction limit switch SW2 can be set at the end of the movement trajectory of the second display screen 22. When the second display screen 22 moves to the limit position, the connecting rod of the limit switch touches the contacts of the switch, thereby closing the closed contacts or opening the contacts, generating a limit signal to stop the second display screen 22 at the limit position.

[0061] In some embodiments, when the controller controls the drive motor 321 to drive the gear 322 to move the second display screen 22, it is not limited to stopping at the limit position. During the movement of the second display screen 22, it can be controlled to hover at any position and alternately rotate forward and reverse to achieve personalized screen switching control, wherein forward rotation refers to controlling the second display screen 22 to extend out of the shell 1, and reverse rotation refers to controlling the display screen 22 to retract into the shell 1.

[0062] In some embodiments, in order to reduce energy consumption, a power supply switching circuit connected to the controller is further included;

[0063] The power supply switching circuit is configured to switch the power supply of the first display screen 21 or the second display screen 22 according to the third control signal of the controller when the second display screen 22 moves to the power supply switching position.

[0064] In some embodiments, the power supply switching circuit includes a limit switch SW3 and a relay, wherein the limit switch SW3 is connected to the relay, and the relay is respectively connected to the display circuit of the first display screen 21 and the display circuit of the second display screen 22. Preferably, the limit switch SW3 is a metal proximity switch.

[0065] For example, when switching from the large-screen working state to the small-screen working state, the second display screen 22 moves to the power switching position during the process of rotating back to the shell 1. The limit switch SW3 detects that the second display screen 22 is approaching and starts to work, so that the relay coil end is energized. After the relay is energized, the contact is switched to connect to the display circuit of the first display screen 21, so that the large screen is turned off and the small screen is turned on, which can effectively reduce energy consumption.

[0066] In some embodiments, as shown in Figures 3 and 4, the first guide rail 31 includes a continuous straight segment 311, a first arc segment 312A and a second arc segment 312B, and the two ends of the first arc segment 312A are smoothly connected to the straight segment 311 and the second arc segment 312B, respectively, thereby achieving a smooth transition between the straight segment 311 and the second arc segment 312B.

[0067] In some embodiments, in order to minimize the space occupied by the second display screen in the Z-axis direction during the rotational movement, the rotation angle of the second display screen in the second arc segment is 90 degrees, so that in the small-screen working state, the hollowing out at the bottom of the second display screen is smaller, making the overall structure of the instrument more beautiful.

[0068] In which, the power switching position can be set to the middle position of the second arc segment. For example, when the rotation angle of the second display screen in the second arc segment is 90 degrees, when the second display screen rotates 45 degrees clockwise or counterclockwise along the second arc segment, that is, when it reaches the power switching position, the power supply of the first display screen or the second display screen can be switched.

[0069] In some embodiments, a reset circuit connected to the controller is further included, and the reset circuit includes an extended reset button K1 and a retracted reset button K2.

[0070] It should be noted that when the extension reset button K1 is closed and the retraction reset button K2 is disconnected, a trigger signal for switching from the small screen to the large screen is sent to the controller, so that the controller controls the drive circuit to switch from the small screen working state to the large screen working state. Similarly, when the retraction reset button K2 is closed and the extension reset button K1 is disconnected, a trigger signal for switching from the large screen to the small screen is sent to the controller, so that the controller controls the drive circuit to switch from the large screen working state to the small screen working state.

[0071] In some embodiments, the switching between the large-screen working state and the small-screen working state is not limited to the above method. Control instructions can also be sent to the controller through an external remote control or other control terminal, for example, control instructions are sent to the controller through the vehicle's central control instrument, which is not limited here.

[0072] In some embodiments, the operating mode of the second display screen includes but is not limited to a welcome mode, a comfort mode, and a rest mode, and the operating mode of the first display screen includes but is not limited to a track mode.

[0073] Based on the above disclosure, the working principle of the control circuit of the flip instrument in the embodiment of the present application to control the small screen to switch to the large screen is as follows:

[0074] When switching from the small-screen working state to the large-screen working state, the extending reset button K1 is closed and the retracting reset button K2 is opened, and the controller sends the first control signal to the drive circuit to enable the drive mechanism 32 to drive the second display screen 22 to move along the straight segment 311 and the arc segment 312 of the first guide rail 31; when the second display screen 22 rotates to the middle position of the second arc segment 312, that is, when it rotates 45 degrees clockwise along the second arc segment 312, the limit switch SW3 detects that the second display screen 22 is approaching and starts working to energize the relay coil end. After the relay is energized, the contact is switched to connect to the display circuit of the second display screen 22, the first display screen 21 goes out, the second display screen lights up, and the vehicle switches from the small-screen track mode to the large-screen comfort mode. When the controller receives the limit signal sent by the limit circuit, it sends the second control signal to the drive circuit so that the drive circuit receives the second control signal and stops driving the second display screen 22, so that the second display screen 22 stops at the working position.

[0075] Among them, the control circuit of the flip instrument in the embodiment of the present application controls the switching of the large screen to the small screen, which is the reverse process of the above-mentioned control method and will not be repeated here.

[0076] Based on the above-disclosed content, the control circuit of the embodiment of the present application controls the driving circuit through the controller, so that the driving mechanism drives the second display screen to move along the straight segment and arc segment of the first guide rail, and limits the second display screen to a preset position through the limit signal of the limit circuit, thereby realizing multi-dimensional switching control of the second display screen and the first display screen, presenting a better screen switching effect, meeting the user's needs for the instrument working mode in different environments, and enhancing the comfort and sense of technology.

[0077] The following describes a method embodiment of the present application, which is executed in a controller of the control circuit described in the first aspect. For details not disclosed in the method embodiment of the present application, please refer to the control circuit embodiment described above.

[0078] 6 , which shows a flow chart of a method for controlling a flip meter in an embodiment of the present application.

[0079] As shown in FIG6 , according to a second aspect of an embodiment of the present application, a method for controlling a flip instrument is provided. The method is executed in a controller, including but not limited to steps S101 and S102:

[0080] Step S101. Sending a first control signal to a driving circuit so that the driving circuit receives the first control signal, thereby causing the driving mechanism to drive the second display screen to move along the straight line segment and the arc segment of the first guide rail;

[0081] Step S102: Receive a limit signal sent by the limit circuit, and send a second control signal to the driving circuit according to the limit signal, so that the driving circuit receives the second control signal and stops driving the second display screen to move.

[0082] In some embodiments of the present application, based on the aforementioned solution, the driving circuit includes a driving motor.

[0083] In some embodiments of the present application, based on the aforementioned solution, the limit circuit includes an extension limit switch SW1 and a retraction limit switch SW2;

[0084] The extension limit switch SW1 is configured to generate a first limit signal when the second display screen extends out of the housing and moves to a first limit position;

[0085] The retraction limit switch SW2 is configured to generate a second limit signal when the second display screen is retracted into the housing and moves to a second limit position.

[0086] In some embodiments of the present application, based on the aforementioned solution, it further includes a power supply switching circuit connected to the controller;

[0087] The power supply switching circuit is configured to switch the power supply of the first display screen or the second display screen according to a third control signal of the controller when the second display screen moves to the power supply switching position.

[0088] In some embodiments of the present application, based on the aforementioned scheme, the power supply switching circuit includes a limit switch SW3 and a relay, the limit switch SW3 is connected to the relay, and the relay is respectively connected to the display circuit of the first display screen and the display circuit of the second display screen.

[0089] In some embodiments of the present application, based on the aforementioned solution, a reset circuit connected to the controller is further included, and the reset circuit includes an extended reset button K1 and a retracted reset button K2.

[0090] The following describes an embodiment of the device of the present application, which is provided in the controller of the control circuit described in the first aspect of the embodiment of the present application. For details not disclosed in the embodiment of the device of the present application, please refer to the embodiment of the control circuit described above.

[0091] 7 , which shows a structural diagram of a control device for a flip meter in an embodiment of the present application.

[0092] As shown in FIG7 , according to a third aspect of an embodiment of the present application, a control device 200 for a flip instrument is provided. The device is provided in a controller and includes:

[0093] The first signal sending module 201 is configured to send a first control signal to the driving circuit, so that the driving circuit receives the first control signal, thereby causing the driving mechanism to drive the second display screen to move along the straight line segment and the arc segment of the first guide rail;

[0094] The second signal sending module 202 is used to receive the limit signal sent by the limit circuit, and send a second control signal to the driving circuit according to the limit signal, so that the driving circuit receives the second control signal and stops driving the second display screen to move.

[0095] Referring to FIG8 , there is shown a structural diagram of a control system of a flip meter in an embodiment of the present application.

[0096] As shown in Figure 8, according to the fourth aspect of an embodiment of the present application, a control system for a flip instrument is provided, including a control circuit as described in any of the first aspects above, and also including a central control device connected to the controller, and the central control device is at least configured to send a mode switching instruction to the controller so that the controller switches the working mode of the first display screen or the second display screen according to the mode switching instruction.

[0097] In some embodiments, the central control device is the vehicle's own central control instrument. The controller determines the content required to support communication diagnosis based on the communication interface (such as CAN interface and LIN interface, etc.) and functional requirements (such as sleep / wake-up, diagnosis), and reserves an interface with the vehicle.

[0098] In some embodiments, the vehicle's own environmental recognition system, such as an image recognition system, is used to identify changes in the surrounding environment. For example, when a user opens the car door and enters the driver's seat, a mode switching instruction is sent to the controller through the central control instrument so that the controller controls the display screen assembly to the large-screen working state, and the working mode is the power-on welcome mode; for another example, after the vehicle is started, a mode switching instruction is sent to the controller through the central control instrument so that the controller controls the large-screen working mode to switch to the comfort mode; for another example, when the vehicle enters a highway or a city expressway, a mode switching instruction is sent to the controller through the central control instrument so that the controller controls the switching to the small-screen working state, and the working mode is the track mode; for another example, when the user leaves the driver's seat, a mode switching instruction is sent to the controller through the central control instrument so that the controller controls the large-screen working mode to switch to the rest mode, and controls the display screen assembly to be powered off.

[0099] In some embodiments of the present application, based on the above solution, a remote controller is further included, and the remote controller is connected to the controller. Preferably, the remote controller is wirelessly connected to the controller.

[0100] According to a fifth aspect of an embodiment of the present application, a vehicle is provided, comprising a control system as described in any one of the fourth aspects above.

[0101] The foregoing is merely an embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of the claims of the present application.

Claims

1. A control circuit for a flip instrument, characterized in that: The flip instrument comprises a housing, a display screen assembly and a drive assembly, wherein the display screen assembly comprises a first display screen and a second display screen which are not simultaneously accommodated in the housing, the drive assembly comprises a first guide rail and a drive mechanism, and the control circuit comprises a controller, and a drive circuit and a limit circuit connected to the controller; The driving circuit is configured to receive a first control signal so that the driving mechanism drives the second display screen to move along the straight line segment and the arc segment of the first guide rail; The limit circuit is configured to generate a limit signal when the second display screen moves to a limit position; The controller is configured to send the first control signal to the driving circuit, and send the second control signal to the driving circuit according to the limit signal, so that the driving circuit receives the second control signal and stops driving the second display screen.

2. The control circuit according to claim 1, characterized in that: The driving circuit includes a driving motor.

3. The control circuit according to claim 1, characterized in that: The limit circuit includes an extension limit switch SW1 and a retraction limit switch SW2; The extension limit switch SW1 is configured to generate a first limit signal when the second display screen extends out of the housing and moves to a first limit position; The retraction limit switch SW2 is configured to generate a second limit signal when the second display screen is retracted into the housing and moves to a second limit position.

4. The control circuit according to claim 1, characterized in that: Also included is a power supply switching circuit connected to the controller; The power supply switching circuit is configured to switch the power supply of the first display screen or the second display screen according to a third control signal of the controller when the second display screen moves to the power supply switching position.

5. The control circuit according to claim 4, characterized in that: The power supply switching circuit includes a travel switch SW3 and a relay. The travel switch SW3 is connected to the relay. The relay is respectively connected to the display circuit of the first display screen and the display circuit of the second display screen.

6. The control circuit according to claim 1, characterized in that: It also includes a reset circuit connected to the controller, and the reset circuit includes an extended reset button K1 and a retracted reset button K2.

7. A method for controlling a flip instrument, characterized in that: The method is executed in a controller and includes: Sending a first control signal to the driving circuit so that the driving circuit receives the first control signal, so that the driving mechanism drives the second display screen to move along the straight line segment and the arc segment of the first guide rail; A limit signal sent by the limit circuit is received, and a second control signal is sent to the drive circuit according to the limit signal, so that the drive circuit receives the second control signal and stops driving the second display screen to move.

8. A control device for a flip instrument, characterized in that: The device is arranged in a controller and comprises: A first signal sending module is configured to send a first control signal to the driving circuit, so that the driving circuit receives the first control signal, so that the driving mechanism drives the second display screen to move along the straight line segment and the arc segment of the first guide rail; The second signal sending module is configured to receive the limit signal sent by the limit circuit, and send a second control signal to the driving circuit according to the limit signal, so that the driving circuit receives the second control signal and stops driving the second display screen to move.

9. A control system for a flip instrument, characterized in that: It includes a control circuit as described in any one of claims 1-6, and also includes a central control device connected to the controller, and the central control device is at least configured to send a mode switching instruction to the controller so that the controller switches the working mode of the first display screen or the second display screen according to the mode switching instruction.

10. The system according to claim 9, characterized in that A remote controller is also included, and the remote controller is connected to the controller.

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