Folding screen assembly, electronic device and control method

Abstract

The present application relates to the technical field of display devices, and discloses a folding screen assembly, including a flexible screen, a first frame, a second frame, and a driving mechanism. The first frame is used to support a part of the flexible screen, and the second frame is used to support another part of the flexible screen. The first frame and the second frame can generate relative rotation, so that the angle between the first frame and the second frame increases or decreases, thereby driving the flexible screen to unfold or fold. The driving mechanism includes a DC motor and a transmission assembly. The DC motor is connected to the first frame and / or the second frame through the transmission assembly. The DC motor is used to provide rotational power for the first frame and / or the second frame, so as to generate relative rotation between the first frame and the second frame. The present application can realize the automatic unfolding or folding of the folding screen assembly, thereby improving the convenience of user use and the technological sense of the product. The present application also discloses an electronic device and a control method.

Description

Technical Field

[0001] The present application relates to the technical field of display devices, and in particular to a folding screen assembly, an electronic device and a control method. Background Art

[0002] With the continuous upgrading of electronic products, users' demand for the intelligence and convenience of electronic products is also increasing. In order to meet users' demand for large screens and small volumes, with the emergence of flexible screens, foldable screen electronic products have also appeared. When users need to watch the screen, they can unfold the electronic product to increase the screen area. When users do not need to watch the screen, they can fold the electronic product to reduce the volume of the electronic product and make it easier to store the electronic product.

[0003] However, foldable screen electronic products require users to manually unfold or fold the screen, which will reduce the user's convenience and the technological sense of the product. Summary of the invention

[0004] The present application provides a folding screen assembly that can realize automatic unfolding or folding of a flexible screen, thereby enhancing the convenience and experience of users.

[0005] In the first aspect, the present application provides a folding screen assembly, including a flexible screen, a first frame, a second frame and a driving mechanism. The first frame is used to support a part of the flexible screen, and the first frame includes a first surface perpendicular to the thickness direction of the first frame. The second frame is used to support another part of the flexible screen, and the second frame includes a second surface perpendicular to the thickness direction of the second frame. The first frame and the second frame can generate relative rotation, so that the angle between the first surface and the second surface increases or decreases, thereby driving the flexible screen to unfold or fold. The driving mechanism includes a DC motor and a transmission assembly, and the DC motor is connected to the first frame and / or the second frame through the transmission assembly. The DC motor is used to provide rotational power for the first frame and / or the second frame, so as to generate relative rotation between the first frame and the second frame.

[0006] This application can realize automatic unfolding or folding of the folding screen assembly by setting a driving mechanism, thereby improving the convenience of user use and the technological sense of the product.

[0007] In some implementations of the present application, there are two drive mechanisms, and the two drive mechanisms can be arranged on the same side of the folding screen assembly along the first direction, or can be arranged on both sides of the folding screen assembly along the first direction. The first direction is the extension direction of the rotation axis of the first frame and the second frame to generate relative rotation.

[0008] When the two driving mechanisms are arranged on the same side of the folding screen assembly along the first direction, one of the driving mechanisms is connected to the first frame, and the other driving mechanism is connected to the second frame.

[0009] When two driving mechanisms are arranged on both sides of the folding screen assembly along the first direction, one of the driving mechanisms may be connected to the first frame and the other driving mechanism may be connected to the second frame; alternatively, both driving mechanisms may be connected to the first frame and the second frame.

[0010] In some implementations of the present application, the transmission assembly is a gear set, and the gear set includes a driving gear and at least one driven gear. The driving gear is connected to the DC motor, and the driven gear is connected to the first frame or the second frame.

[0011] In some implementations of the present application, the driving gear meshes with the driven gear. In other implementations of the present application, at least one transmission gear is provided between the driving gear and the driven gear, and the driving gear transmits power to the driven gear through the transmission gear.

[0012] In some implementations of the present application, a connecting member is provided between the driven gear and the first frame or the second frame, one end of the connecting member is connected to the driven gear, and the other end of the connecting member is connected to the first frame or the second frame.

[0013] In some implementations of the present application, a control unit is also included, which is electrically connected to the DC motor. The control unit is used to receive a state change instruction and control the operation of the DC motor according to the state change instruction to make the folding screen assembly unfold, fold or hover.

[0014] In some implementations of the present application, the control unit includes:

[0015] A processor, used for identifying a state change instruction and generating a drive instruction according to the state change instruction;

[0016] The motor driving chip is electrically connected to the processor. The motor driving chip is set corresponding to the DC motor, and the motor driving chip is electrically connected to the DC motor corresponding to it. The motor driving chip receives the driving instructions issued by the processor and controls the operation of the DC motor corresponding to it according to the driving instructions.

[0017] In some implementations of the present application, the processor includes:

[0018] A system chip, used for identifying a state change instruction and generating a corresponding first control instruction according to the state change instruction;

[0019] The microcontrol unit is electrically connected to the system chip and the motor drive chip respectively; and the microcontrol unit receives a first control instruction issued by the system chip, and generates a corresponding second control instruction according to the first control instruction, and the second control instruction is a drive instruction.

[0020] In some implementations of the present application, a detection unit is also included, which is electrically connected to the DC motor. The detection unit detects and outputs the current rotation angle value and rotation speed value of the DC motor; and the detection unit is also electrically connected to the processor or the motor driver chip. The processor or the motor driver chip can receive the rotation angle value and rotation speed value sent by the detection unit, and adjust the rotation angle and rotation speed of the DC motor according to the rotation angle value and the rotation speed value.

[0021] In some implementations of the present application, the number of driving mechanisms is at least two, and each driving mechanism is disposed between the first frame and the second frame; the processor or motor driving chip can also control the synchronous operation of each motor according to the rotation angle value and rotation speed value received by it.

[0022] In a second aspect, the present application provides a control method for a folding screen assembly as in the first aspect, comprising:

[0023] Receive a state change instruction, where the state change instruction is used to change the folding screen component to a first state;

[0024] Based on the state change instruction, generate and output a drive instruction for the motor drive chip, and receive the travel monitoring information of the DC motor;

[0025] In response to the opening and closing angle of the folding screen assembly fed back in the travel monitoring information reaching an angle corresponding to the first state, it is determined that the folding screen assembly is in the first state.

[0026] In some implementations of the present application, the following is also included:

[0027] An interrupt signal instructing to set the folding screen assembly to a hovering state is received during the operation of the DC motor;

[0028] In response to the interrupt signal, determining that the current angle of the folding screen assembly has not reached a preset angle corresponding to the hovering state, and continuing to instruct the DC motor to operate;

[0029] Determine that the current angle of the folding screen assembly has reached a preset angle, and generate and output an instruction to stop the operation of the DC motor.

[0030] In some implementations of the present application, the following is also included:

[0031] An interrupt signal instructing to set the folding screen assembly to a hovering state is received during the operation of the DC motor;

[0032] In response to the interrupt signal, determining that the current angle of the folding screen assembly has exceeded a preset angle corresponding to the hovering state, and instructing the DC motor to run in the reverse direction;

[0033] Determine that the current angle of the folding screen assembly has been reduced to a preset angle, and generate and output an instruction to stop the operation of the DC motor.

[0034] In some implementations of the present application, the driving instruction comes from a system chip, and the driving instruction is generated by the system chip based on the state change instruction and the current state confirmation information of the folding screen component.

[0035] In some implementations of the present application, the driving instruction comes from a microcontroller unit, and the driving instruction is generated by the microcontroller unit based on the state change instruction and the current state confirmation information of the folding screen component.

[0036] In a third aspect, the present application provides an electronic device comprising a first shell, a second shell and a folding screen assembly as in the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 The folding screen assembly provided in one embodiment of the present application is shown in FIG. Figure 1 ;

[0038] FIG. 2 ( a ) shows a schematic diagram of a folding screen assembly in an unfolded state in some embodiments;

[0039] FIG2( b ) shows a schematic diagram of a folding screen assembly in a folded state in some embodiments;

[0040] Figure 3 A second perspective view of a folding screen assembly provided in one embodiment of the present application is shown;

[0041] FIG4 (a) shows a top view of a folding screen assembly provided in one embodiment of the present application. Figure 1 ;

[0042] FIG4 ( b ) shows a second top view of the folding screen assembly provided in one embodiment of the present application;

[0043] FIG5( a ) shows a cross-sectional view taken along the AA direction of FIG4( a );

[0044] FIG5( b ) shows a BB cross-sectional view of FIG4( b );

[0045] Figure 6 A top view of a folding screen assembly provided in one embodiment of the present application is shown. Figure 3 ;

[0046] Figure 7 Shows Figure 6 CC section view of ;

[0047] Figure 8 A fourth top view of a folding screen assembly provided in one embodiment of the present application is shown;

[0048] Fig. 9 Shows Figure 8 DD section view;

[0049] Fig.10 The structure of the control unit in one embodiment of the present application is shown. Figure 1 ;

[0050] Fig.11 It shows a structural block diagram 2 of the control unit in one embodiment of the present application;

[0051] Fig.12 The control method flow of the folding screen assembly provided in one embodiment of the present application is shown. Figure 1 ;

[0052] Fig.13 A second flow chart of a control method for a folding screen assembly provided in one embodiment of the present application is shown. DETAILED DESCRIPTION

[0053] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0054] The present application provides a folding screen assembly that can be widely used in electronic devices. The electronic device can be a mobile phone, a laptop computer, a tablet computer, a mobile phone accessory, a laptop computer accessory, a tablet computer accessory, etc., and the present application does not limit this. The present application is described below by taking the folding screen assembly applied to a mobile phone as an example.

[0055] Figure 1 Schematic diagram of the structure of the folding screen assembly in some embodiments is shown. Figure 1 The folding screen assembly includes a flexible screen 1, a first frame 2, a second frame 3 and a driving mechanism 4. The first frame 2 is used to support a part of the flexible screen 1, and the first frame 2 includes a first surface 21 perpendicular to the thickness direction of the first frame 2. The second frame 3 is used to support another part of the flexible screen 1, and the second frame 3 includes a second surface 31 perpendicular to the thickness direction of the second frame 3. The first frame 2 and the second frame 3 can generate relative rotation to increase or decrease the angle between the first surface 21 and the second surface 31, thereby driving the flexible screen 1 to unfold or fold. When the flexible screen 1 is unfolded, as shown in Figure 2 (a), the angle between the first surface 21 and the second surface 31 is 180°. When the flexible screen 1 is folded, as shown in Figure 2 (b), the angle between the first surface 21 and the second surface 31 is 0°. Return Figure 1The driving mechanism 4 includes a DC motor 41 and a transmission assembly 42. The transmission assembly 42 can be a gear set. The DC motor 41 is connected to the first frame 2 and / or the second frame 3 through the transmission assembly 42. The DC motor 41 is used to provide rotational power for the first frame 2 and / or the second frame 3, so that the first frame 2 and the second frame 3 can achieve relative rotation with the help of the transmission assembly 42.

[0056] By setting up a driving mechanism 4, the present application can realize automatic unfolding or folding of the folding screen assembly without the need for manual operation by the user, thus freeing the user's hands, thereby improving the user's convenience and the technological sense of the product.

[0057] In some implementations of the present application, the DC motor 41 may be a brushless DC motor with a diameter of less than 6 mm, an output torque of 0.2-0.6 mN·m, a rotation speed of 10000-50000 r / min, and an efficiency of 90%. Since the folding screen assembly is used in electronic devices such as mobile phones and tablets, which are generally small in size and have a high demand for space, the DC motor 41 is preferably 2-6 mm.

[0058] This application sets the drive motor as a brushless DC motor, which can make the motor provide greater rotational force and generate less heat. Specifically, compared with stepper motors of the same volume, DC motors have the characteristics of large torque, high speed and high efficiency. For example, for a motor with a diameter of 4-6mm, the output torque of the stepper motor is 0.02-0.3mN·m, the speed is less than 10000r / min, and the efficiency is 50%-60%; while the output torque of the brushless DC motor is 0.38-0.6mN·m, the speed is 10000-50000r / min, and the efficiency is 90%. Comparing the above parameters of the stepper motor and the brushless DC motor, it can be seen that since the brushless DC motor has a higher output torque, it can provide greater rotational force for the folding screen assembly.

[0059] In addition, the torque of the DC motor 41 in the driving mechanism 4 is transmitted to the outside through the gear set. In actual production, the rotation speed of the folding screen assembly is determined by the output speed of the driving mechanism 4. Since the rotation speed of the folding screen assembly is required to be a constant, the output speed of the driving mechanism 4 is also a constant. Since the output speed of the driving mechanism 4 is equal to the speed of the DC motor 41 divided by the transmission ratio of the gear set, under the premise that the output speed of the driving mechanism 4 remains unchanged, the speed of the DC motor 41 is positively correlated with the transmission ratio of the gear set. Since the speed of the DC motor 41 is relatively high, the transmission ratio of the gear set should also be increased accordingly. At the same time, since the output torque of the driving mechanism 4 is the output torque of the DC motor 41 multiplied by the transmission ratio of the gear set, under the premise that the transmission ratio of the gear set is increased, the output torque of the driving mechanism 4 can also be further increased, thereby further providing greater rotational force for the folding screen assembly.

[0060] In addition, compared with the stepper motor, the DC motor 41 has no brushes to generate friction, so it is more efficient and generates less heat, which can effectively prevent the electronic product from getting hot, thereby enhancing the user experience and increasing the service life of the electronic product.

[0061] In some implementations of the present application, the driving mechanism 4 can be connected to one of the first frame 2 and the second frame 3, or can be connected to both the first frame 2 and the second frame 3. When the driving mechanism 4 is only connected to the first frame 2, the driving mechanism 4 can drive the first frame 2 to rotate so that the angle between the first frame 2 and the second frame 3 changes. When the driving mechanism 4 is only connected to the second frame 3, the driving mechanism 4 can drive the second frame 3 to rotate so that the angle between the first frame 2 and the second frame 3 changes. When the driving mechanism 4 is connected to both the first frame 2 and the second frame 3, the driving mechanism 4 can simultaneously drive the first frame 2 and the second frame 3 to rotate in opposite directions so that the angle between the first frame 2 and the second frame 3 decreases, or drive the first frame 2 and the second frame 3 to rotate in opposite directions so that the angle between the first frame 2 and the second frame 3 increases.

[0062] The present application does not limit the number of driving mechanisms 4. As long as the power of the DC motor 41 can be transmitted to the first frame 2 and / or the second frame 3, and the structure can ensure that the frame can be effectively rotated, it is within the protection scope of the present application. Specifically, a driving mechanism 4 includes a DC motor 41 and a transmission assembly 42. The DC motor 41 can be connected to one of the first frame 2 and the second frame 3 through the transmission assembly 42, or it can be connected to both the first frame 2 and the second frame 3. The number of driving mechanisms 4 can be set with reference to the opening and closing force requirements of the folding screen assembly in actual application. When one driving mechanism 4 can meet the opening and closing force requirements of the folding screen assembly, the folding screen assembly can include only one driving mechanism 4. When one driving mechanism 4 cannot meet the opening and closing force requirements of the folding screen assembly, the folding screen assembly can also include multiple driving mechanisms 4, and control multiple driving mechanisms 4 to work together to provide a greater rotational torque for the folding screen assembly.

[0063] For example, in some implementations of the present application, the number of the driving mechanisms 4 is two, and the two driving mechanisms 4 can be arranged along the X direction (recorded as an example of the first direction) on the geometric center line of the folding screen assembly (such as Figure 1 on the same side as the dashed line L in Figure 1 As shown), it can also be set along the X direction on the geometric center line of the folding screen component (as shown Figure 3 The two sides of the Figure 3). The X direction is the extension direction of the rotation axis of the first frame 2 and the second frame 3 that generate relative rotation.

[0064] Further, when the two driving mechanisms 4 are arranged on the same side of the geometric center line of the folding screen assembly along the X direction, the two driving mechanisms 4 can be juxtaposed or arranged in series. Figure 4 (a) shows a top view of the two driving mechanisms 4 arranged in parallel on the same side of the geometric center line of the folding screen assembly along the X direction, and Figure 5 (a) shows an AA-direction cross-sectional view of Figure 4 (a). Figure 4 (b) shows a top view of the two driving mechanisms 4 arranged in series on the same side of the geometric center line of the folding screen assembly along the X direction, and Figure 5 (b) shows a BB-direction cross-sectional view of Figure 4 (b). Referring to Figures 4 (a), 4 (b), 5 (a) and 5 (b), when the two driving mechanisms 4 are arranged on the same side of the geometric center line of the folding screen assembly along the X direction, one of the driving mechanisms 4 is connected to the first frame 2 to drive the first frame 2 to rotate, and the other driving mechanism 4 is connected to the second frame 3 to drive the second frame 3 to rotate.

[0065] Furthermore, when the two driving mechanisms 4 are arranged on both sides of the geometric center line of the folding screen assembly along the X direction, one of the driving mechanisms 4 can be connected to the first frame 2, and the other driving mechanism 4 can be connected to the second frame 3; or both driving mechanisms 4 can be connected to both the first frame 2 and the second frame 3.

[0066] Figure 6 A schematic diagram showing two driving mechanisms 4 are arranged on both sides of the geometric center line of the folding screen assembly along the X direction, and one driving mechanism 4 is connected to the first frame 2, and the other driving mechanism 4 is connected to the second frame 3. Figure 7 Shows Figure 6 CC section view of the reference Figure 6 and Figure 7 When the flexible screen 1 needs to be unfolded or folded, the two driving mechanisms 4 can respectively drive the first frame 2 and the second frame 3 to rotate toward or away from each other.

[0067] Figure 8 A schematic diagram showing two driving mechanisms 4 disposed on both sides of the geometric center line of the folding screen assembly along the X direction, and the two driving mechanisms 4 are connected to both the first frame 2 and the second frame 3, Fig. 9 Shows Figure 8 DD section view. Figure 8 and Fig. 9 When the flexible screen 1 needs to be unfolded or folded, each driving mechanism 4 can simultaneously drive the first frame 2 and the second frame 3 to rotate toward or away from each other. This design can balance the forces on the first frame 2 and the second frame 3.

[0068] The present application does not limit the structure of the transmission assembly 42, and any structure that can transmit the power of the DC motor 41 to the first frame 2 or the second frame 3 is within the protection scope of the present application. The present application is described below by taking the transmission assembly 42 as a gear set as an example.

[0069] Figure 7 and Fig. 9 The schematic diagrams of the structures of different transmission components 42 are shown respectively. Figure 7 and Fig. 9 The transmission assembly 42 includes a driving gear 421 and at least one driven gear 422. Figure 7 For example, the driving gear 421 is connected to the DC motor 41, and the driven gear 422 is connected to the first frame 2 or the second frame 3 through the connecting member 43. The connecting member 43 is arranged between the driven gear 422 and the first frame 2 or the second frame 3, one end of the connecting member 43 is connected to the driven gear 422, and the other end of the connecting member 43 is connected to the first frame 2 or the second frame 3. Exemplarily, a groove 44 is opened on the side wall of the first frame 2 or the second frame 3, and the connecting member 43 is inserted into the groove 44 to enhance the structural strength.

[0070] In some embodiments of the present application, reference Figure 7 , the driving gear 421 is meshed with the driven gear 422, and the driving gear 421 can directly transmit power to the driven gear 422. In other embodiments of the present application, refer to Fig. 9 At least one transmission gear 423 is provided between the driving gear 421 and the driven gear 422 . The driving gear 421 and the driven gear 422 are respectively meshed with the transmission gear 423 . The driving gear 421 transmits power to the driven gear 422 through the transmission gear 423 .

[0071] In some implementations of the present application, the folding screen assembly also includes a control unit. Since the folding screen assembly provided in the present application can be automatically unfolded or folded according to instructions sent by the user (for example, through a touch screen or a button, etc.), a control unit needs to be provided in such an implementation. Specifically, the control unit is electrically connected to the DC motor 41, and the control unit is used to receive a state change instruction, and control the operation of the DC motor 41 according to the state change instruction to make the folding screen assembly unfold, fold or hover. Specifically, when the folding screen assembly is in a hovering state, the angle between the first surface 21 and the second surface 31 is less than 180° and greater than 0°. Exemplarily, when the folding screen assembly is in a hovering state, the angle between the first surface 21 and the second surface 31 can be 90°.

[0072] In some implementations of the present application, the control unit includes a processor and a motor drive chip 53. The processor is used to identify a state change instruction and generate a drive instruction according to the state change instruction. The motor drive chip 53 is electrically connected to the processor, the motor drive chip 53 is arranged corresponding to the DC motor 41, and the motor drive chip 53 is electrically connected to the DC motor 41 corresponding thereto. The motor drive chip 53 receives the drive instruction issued by the processor and controls the operation of the DC motor 41 corresponding thereto according to the drive instruction.

[0073] The present application does not limit the specific structure of the processor. In some embodiments, the processor includes a system-on-a-chip (SOC) 51 and a microcontroller unit (MCU) 52. In other embodiments, if the computing power of the system chip 51 and the capabilities of the general-purpose I / O ports (GPIO) can meet the control requirements, the microcontroller unit 52 can also be omitted. The present application is described below by taking the processor including the system chip 51 and the microcontroller unit 52 as an example.

[0074] The system chip 51 is used to identify the state change instruction and generate a corresponding first control instruction according to the state change instruction. Specifically, the user can input the state change instruction through various information interaction methods such as buttons, touch screens or gestures. The state change instruction can be to instruct the folding screen component to unfold, fold or hover. When the user enters the state change instruction, the state change instruction is recognized by the system chip 51, and the system chip 51 will generate and issue a first control instruction corresponding to the state change instruction. Exemplarily, the state change instruction can be an unfold instruction, a fold instruction or a hover instruction.

[0075] The microcontroller unit 52 is electrically connected to the system chip 51 and the motor driving chip 53 respectively, and receives the first control instruction sent by the system chip 51, and generates a second control instruction corresponding to the first control instruction according to the first control instruction. The second control instruction is a driving instruction.

[0076] The present application does not limit the number of DC motors 41. When the output torque of a single DC motor 41 cannot meet the opening and closing force requirements, two or more DC motors 41 may be provided to work together to provide greater torque. Fig.10 It shows a structural block diagram of the control unit when the number of DC motor 41 is one. Fig.11The structure block diagram of the control unit is shown when there are multiple DC motors 41. When there are multiple DC motors 41, one motor driver chip 53 can be used to control multiple DC motors 41, or the motor driver chips 53 can be set to be equal to the number of DC motors 41 and correspond one to one, and each motor driver chip 53 controls the corresponding DC motor 41.

[0077] In order to enable those skilled in the art to better understand the technical solution of the present application, the operation of the control unit is described below through an embodiment. Fig.11 When the system chip 51 recognizes the expansion instruction input by the user, the system chip 51 generates a first control instruction corresponding to the expansion instruction, and sends the first control instruction to the micro control unit 52. After receiving the first control instruction, the micro control unit 52 generates a second control instruction corresponding to the first control instruction, and sends it to each motor drive chip 53. In this embodiment, the number of motor drive chips 53 is two, namely, 1# motor drive chip 531 and 2# motor drive chip 532. The number of DC motors 41 is two, namely, 1# DC motor 411 and 2# DC motor 412. Among them, 1# motor drive chip 531 receives the second control instruction issued by the micro control unit 52, and controls the corresponding 1# DC motor 411 to run according to the second control instruction. 2# motor drive chip 532 receives the second control instruction issued by the micro control unit 52, and controls the corresponding 2# DC motor 412 to run according to the second control instruction. 1# DC motor 411 and 2# DC motor 412 work simultaneously to drive the folding screen assembly to unfold.

[0078] In some implementations of the present application, a detection unit 54 is further included, and the number of the detection units 54 is equal to and one-to-one corresponding to the DC motor 41. The detection unit 54 is electrically connected to the DC motor 41 corresponding thereto to detect and output the current rotation angle value and rotation speed value of the DC motor 41. In addition, the detection unit 54 is also electrically connected to the processor or motor driver chip 53, and the processor or motor driver chip 53 can receive the rotation angle value and rotation speed value sent by the detection unit 54, and adjust the rotation angle and rotation speed of the DC motor 41 according to the rotation angle value and rotation speed value. Exemplarily, the detection unit 54 can be a Hall sensor and / or an encoder.

[0079] Specifically, in some embodiments, if the motor driver chip 53 has more powerful functions, the detection unit 54 can be directly electrically connected to the motor driver chip 53, and send the rotation angle value and rotation speed value detected by it to the motor driver chip 53, and then the motor driver chip 53 adjusts the rotation angle and rotation speed of the DC motor 41 according to the rotation angle value and rotation speed value. In other embodiments, if the motor driver chip 53 has fewer functions, the detection unit 54 can be electrically connected to the processor.

[0080] In the case where the detection unit 54 is electrically connected to the processor, if the processor includes a system chip 51 and a micro control unit 52, the detection unit 54 is electrically connected to the micro control unit 52, and the micro control unit 52 can receive the rotation angle value and the rotation speed value sent by the detection unit 54, and adjust the rotation angle and the rotation speed of the DC motor 41 according to the rotation angle value and the rotation speed value. In the case where the detection unit 54 is electrically connected to the processor, if the processor includes a system chip 51 but does not include a micro control unit 52, the detection unit 54 is electrically connected to the system chip 51, and the system chip 51 can receive the rotation angle value and the rotation speed value sent by the detection unit 54, and adjust the rotation angle and the rotation speed of the DC motor 41 according to the rotation angle value and the rotation speed value. Compared with stepper motors, although DC motors have the characteristics of large torque, high speed and high efficiency, from the perspective of software control, the precision control of DC motors is more difficult. In other words, it is more difficult for DC motors to achieve high-precision operations. By setting the detection unit 54, the present application can accurately control the opening and closing angle and opening and closing speed of the folding screen assembly, thereby compensating for the defects of the DC motor in terms of precision.

[0081] In order to enable those skilled in the art to better understand the technical solution of the present application, the function and connection relationship of the detection unit 54 are described in detail below through an embodiment. Fig.11 , the number of detection units 54 is two, namely, 1# detection unit 541 and 2# detection unit 542. Among them, 1# detection unit 541 is electrically connected to 1# DC motor 411 to detect the current rotation angle value and rotation speed value of 1# DC motor 411. 2# detection unit 542 is electrically connected to 2# DC motor 412 to detect the current rotation angle value and rotation speed value of 2# DC motor 412. 1# detection unit 541 and 2# detection unit 542 are also electrically connected to micro control unit 52, and micro control unit 52 can adjust the rotation angle and rotation speed of 1# DC motor 411 and 2# DC motor 412 respectively according to the rotation angle value and rotation speed value output by 1# detection unit 541 and 2# detection unit 542.

[0082] In actual applications, the rotation speed of the folding screen assembly is required to be within a certain range. The present application can detect the rotation speed value of the folding screen assembly in real time by setting a detection unit 54. When the rotation speed value of the folding screen assembly is too large, the microcontrol unit 52 can control the DC motor 41 to reduce the speed by sending instructions to the motor driver chip 53; when the rotation speed value of the folding screen assembly is too small, the microcontrol unit 52 can control the DC motor 41 to increase the speed by sending instructions to the motor driver chip 53, so that the rotation speed of the folding screen assembly is kept within a preset range, thereby improving the stability of the rotation speed of the folding screen assembly. In addition, the microcontrol unit 52 can also detect the rotation angle value of the folding screen assembly in real time to ensure that the folding screen assembly can be rotated to the preset angle required by the user (i.e., the corresponding angle of the unfolded state, folded state or hovering state), so as to accurately control the opening and closing angle of the folding screen assembly.

[0083] In some implementations of the present application, when there are multiple drive mechanisms 4, each drive mechanism 4 is disposed between the first frame 2 and the second frame 3. The processor or motor drive chip 53 electrically connected to the detection unit 54 can also control the DC motors 41 to operate synchronously according to the received rotation angle value and rotation speed value, so as to prevent structural damage caused by inconsistent operation of the DC motors 41.

[0084] Further, when the detection unit 54 is electrically connected to the micro-control unit 52, the micro-control unit 52 can obtain the preset rotation angle value that the DC motor 41 should reach at different time points through calculation. When the current rotation angle value of one or more DC motors 41 is different from the current preset angle value, the micro-control unit 52 can change the rotation angle of the DC motor 41 by sending instructions to the motor driving chip 53, so that the current rotation angle value of each DC motor 41 is the same as the preset angle value at the current time point, thereby realizing the synchronous operation of each DC motor 41. When the current rotation angle values ​​of each DC motor 41 are equal, the micro-control unit 52 can control each DC motor 41 to run at the same preset rotation speed to ensure that each DC motor 41 can subsequently run stably and synchronously.

[0085] Similar to the above circuit, since the present application uses a DC motor 41, the process control also includes monitoring the travel of the DC motor 41, etc., so it needs to be implemented with dedicated software and control procedures.

[0086] Second, refer to Fig.12 The present application provides a control method for a folding screen assembly as in the first aspect, comprising:

[0087] Step S1: receiving a state change instruction, where the state change instruction is used to change the folding screen component to a first state.

[0088] Among them, the first state can be an unfolded state, a folded state or a hovering state. The user can input a state change instruction through various information interaction methods such as buttons, touch screens or gestures. The state change instruction can instruct the folding screen component to unfold, fold or hover.

[0089] Step S2: Based on the state change instruction, generate and output a drive instruction for the motor drive chip 53 , and receive the travel monitoring information of the DC motor 41 .

[0090] When the state change instruction is received, the system generates a driving instruction for the motor driver chip 53 based on the state change instruction, so that the motor driver chip 53 controls the operation of the DC motor 41 after receiving the driving instruction. During the operation of the DC motor 41, the system monitors the stroke of the DC motor 41 (i.e., the rotation angle value of the DC motor 41).

[0091] Step S3: In response to the opening and closing angle of the folding screen assembly fed back in the travel monitoring information reaching an angle corresponding to the first state, it is determined that the folding screen assembly is in the first state.

[0092] When the opening and closing angle of the folding screen assembly reaches an angle corresponding to the first state, the system confirms that the folding screen assembly is in the first state corresponding to the state change instruction.

[0093] In order to enable those skilled in the art to better understand the technical solution of the present application, the control method of the folding screen component is described in detail below, taking the state change instruction input by the user as an expansion instruction as an example.

[0094] refer to Fig.13 When the system chip recognizes the unfolding instruction input by the user received by the system, the system detects the current state of the folding screen assembly through the Hall sensor or acceleration sensor of the electronic product. If the current state of the folding screen assembly is the unfolded state, the system confirms that the folding screen assembly is in the unfolded state, and the control unit will not control the DC motor 41 to operate. When the current state of the folding screen assembly is the folded state or the hovering state, the system chip 51 generates a first control instruction corresponding to the unfolding instruction, and sends the first control instruction to the micro control unit 52. After receiving the first control instruction, the micro control unit 52 generates a second control instruction (i.e., a driving instruction) corresponding to the first control instruction, and sends it to each motor driving chip 53. After receiving the second control instruction issued by the micro control unit 52, the motor driving chip 53 controls the corresponding DC motor 41 to operate according to the second control instruction to drive the folding screen assembly to unfold. During the operation of the DC motor 41, the detection unit 54 monitors the stroke (i.e., the rotation angle) of the DC motor 41, and determines whether an interrupt signal set to the hovering state is received during the operation of the DC motor 41.

[0095] If the system chip 51 receives an interrupt signal during the process of the DC motor 41 driving the folding screen assembly to unfold, the DC motor 41 drives the folding screen assembly to rotate to the hovering state, and when the detection unit 54 detects that the rotation angle of the DC motor 41 reaches the preset angle corresponding to the hovering state (that is, when the angle between the first frame 2 and the second frame 3 is 90°), the DC motor 41 is controlled to stop running. At this time, the system confirms that the folding screen assembly is in the hovering state.

[0096] If the system chip 51 does not receive an interrupt signal during the process of the DC motor 41 driving the folding screen assembly to unfold, the DC motor 41 drives the folding screen assembly to continue to rotate until the detection unit 54 detects that the rotation angle of the DC motor 41 reaches the preset angle corresponding to the unfolded state (that is, when the angle between the first frame 2 and the second frame 3 is 180°), and then controls the DC motor 41 to stop running. Subsequently, the Hall sensor or acceleration sensor of the electronic product detects the opening and closing state of the folding screen assembly. If it is detected that the folding screen assembly is in the unfolded state, the system confirms that the folding screen assembly is in the unfolded state, and the control operation is completed. If it is detected that the folding screen assembly is not in the unfolded state, the device abnormality is reported.

[0097] Although in Fig.13 In the implementation mode, the driving instruction is generated by the microcontroller unit 52 according to the state change instruction issued by the user and the current state confirmation information of the folding screen component. However, in some other implementation modes of the present application, the driving instruction may also come directly from the system chip 51. Specifically, if the computing power of the system chip 51 and the capabilities of the general-purpose I / O ports (GPIO, General-Purpose IO ports) can meet the control requirements, the microcontroller unit 52 can be omitted, and the driving instruction comes from the system chip 51. If the computing power of the system chip 51 and the capabilities of the general-purpose I / O ports (GPIO, General-Purpose IO ports) cannot meet the control requirements, the microcontroller unit 52 cannot be omitted, and the driving instruction comes from the microcontroller unit 52.

[0098] When the driving instruction comes from the system chip 51, the driving instruction is generated by the system chip 51 according to the state change instruction issued by the user and the current state confirmation information of the folding screen component. When the driving instruction comes from the micro control unit 52, the driving instruction is generated by the micro control unit 52 according to the state change instruction issued by the user and the current state confirmation information of the folding screen component.

[0099] In some implementations of the present application, the user may also input an interrupt signal to set the folding screen assembly to a hovering state during the operation of the DC motor 41. When the system receives an interrupt signal during the operation of the DC motor 41, the system responds to the interrupt signal and determines the current angle of the folding screen assembly. Exemplarily, the user can input an interrupt signal through a variety of information interaction methods such as buttons, touch screens, or gestures, or can input an interrupt signal by manually touching the device so that the DC motor 41 senses an obstruction; the user can also input an interrupt signal through voice control so that the system recognizes the sound.

[0100] When the system receives an interrupt signal and the current angle of the folding screen assembly has not reached the preset angle corresponding to the hovering state, it continues to instruct the DC motor 41 to run until it is determined that the current angle of the folding screen assembly has reached the preset angle, and generates and outputs an instruction to stop the operation of the DC motor 41.

[0101] When the system receives an interrupt signal and the current angle of the folding screen assembly has exceeded the preset angle corresponding to the hovering state, the DC motor 41 is instructed to run in reverse until it is determined that the current angle of the folding screen assembly has been reduced to the preset angle, and an instruction to stop the operation of the DC motor 41 is generated and output.

[0102] In a third aspect, the present application provides an electronic device, comprising a first shell (not shown in the figure), a second shell (not shown in the figure) and a folding screen assembly as in the first aspect.

[0103] In some implementations of the present application, the first housing and the second housing are hingedly connected via a hinge, the first frame 2 is connected to the first housing, and the second frame 3 is connected to the second housing. The first housing and the second housing can generate relative rotation via the hinge, so that the first frame 2 and the second frame 3 can generate relative rotation.

[0104] The above is an explanation of the implementation mode of the present application by specific specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Although the description of the present application will be introduced in conjunction with some embodiments, this does not mean that the features of this application are limited to the implementation mode. On the contrary, the purpose of introducing the application in conjunction with the implementation mode is to cover other options or modifications that may be extended based on the claims of the present application. The present application can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present application, some specific details are omitted in the description. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0105] In the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0106] In the embodiments of the present application, "and / or" is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0107] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0108] In the description of the present application, it should be noted that the terms "upper", "lower", "top", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and 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.

[0109] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "setting", "installation", "connection" and "fitting" 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 an indirect connection 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.

[0110] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A folding screen assembly, characterized in that: include: Flexible screen; A first frame, used to support a portion of the flexible screen, the first frame comprising a first surface perpendicular to a thickness direction of the first frame; A second frame, used to support another part of the flexible screen, the second frame comprising a second surface perpendicular to the thickness direction of the second frame, and the first frame and the second frame can generate relative rotation to increase or decrease the angle between the first surface and the second surface, so as to drive the flexible screen to unfold or fold; A driving mechanism, comprising a DC motor and a transmission assembly, wherein the DC motor has a diameter of 2 mm to 6 mm, the DC motor is connected to the first frame and / or the second frame through the transmission assembly, and the DC motor is used to provide rotational power for the first frame and / or the second frame, so as to generate relative rotation between the first frame and the second frame; A control unit, electrically connected to the DC motor, and configured to receive a state change instruction and control the operation of the DC motor according to the state change instruction so as to enable the folding screen assembly to unfold, fold or hover; The control unit includes: A processor, used for identifying the state change instruction, and generating a driving instruction according to the state change instruction; the processor includes a system chip and a micro control unit, the system chip is used for identifying the state change instruction, and generating a corresponding first control instruction according to the state change instruction; the micro control unit is electrically connected to the system chip and the motor driving chip respectively; and the micro control unit receives the first control instruction issued by the system chip, and generates a corresponding second control instruction according to the first control instruction, and the second control instruction is the driving instruction; a motor driving chip, electrically connected to the processor, the motor driving chip being arranged corresponding to the DC motor, and the motor driving chip being electrically connected to the DC motor corresponding thereto, the motor driving chip receiving the driving instruction issued by the processor, and controlling the operation of the DC motor corresponding thereto according to the driving instruction; The folding screen assembly also includes a detection unit, which is electrically connected to the DC motor, and the detection unit detects and outputs the current rotation angle value and rotation speed value of the DC motor; and the detection unit is also electrically connected to the processor or the motor driver chip, and the processor or the motor driver chip can receive the rotation angle value and the rotation speed value sent by the detection unit, and adjust the rotation angle and rotation speed of the DC motor according to the rotation angle value and the rotation speed value.

2. The folding screen assembly according to claim 1, characterized in that: There are two driving mechanisms, and the two driving mechanisms are arranged on the same side of the folding screen assembly along a first direction, and the first direction is the extension direction of the rotation axis of the first frame and the second frame to generate relative rotation; one of the driving mechanisms is connected to the first frame, and the other driving mechanism is connected to the second frame.

3. The folding screen assembly according to claim 1, characterized in that: The number of the driving mechanisms is two, and the two driving mechanisms are arranged on both sides of the folding screen assembly along a first direction, and the first direction is an extension direction of a rotation axis of the first frame and the second frame for relative rotation; One of the driving mechanisms is connected to the first frame, and the other driving mechanism is connected to the second frame; or The two driving mechanisms are both connected to the first frame and the second frame.

4. The folding screen assembly according to claim 1, characterized in that: The transmission assembly is a gear set, and the gear set includes: A driving gear connected to the DC motor; at least one driven gear connected to the first frame or the second frame; The driving gear meshes with the driven gear, or At least one transmission gear is further provided between the driving gear and the driven gear, and the driving gear transmits power to the driven gear through the transmission gear.

5. The folding screen assembly according to claim 4, characterized in that: A connecting member is provided between the driven gear and the first frame or the second frame, one end of the connecting member is connected to the driven gear, and the other end of the connecting member is connected to the first frame or the second frame.

6. The folding screen assembly according to claim 1, characterized in that: The number of the driving mechanisms is at least two, and each driving mechanism is arranged between the first frame and the second frame; the processor or the motor driving chip can also control the synchronous operation of each motor according to the rotation angle value and the rotation speed value received by it.

7. A control method for a folding screen assembly as claimed in any one of claims 1 to 6, characterized in that: include: receiving a state change instruction, wherein the state change instruction is used to change the folding screen component to a first state; Based on the state change instruction, generate and output a drive instruction for a motor drive chip, and receive travel monitoring information of the DC motor; In response to the opening and closing angle of the folding screen assembly fed back in the travel monitoring information reaching an angle corresponding to the first state, it is determined that the folding screen assembly is in the first state.

8. The control method of the folding screen assembly according to claim 7, characterized in that: During the operation of the DC motor, an interrupt signal instructing to set the folding screen assembly to a hovering state is received; In response to the interrupt signal, determining that the current angle of the folding screen assembly has not reached a preset angle corresponding to the hovering state, and continuing to instruct the DC motor to operate; Determine that the current angle of the folding screen assembly has reached a preset angle, and generate and output an instruction to stop the operation of the DC motor.

9. The control method of the folding screen assembly according to claim 7, characterized in that: During the operation of the DC motor, an interrupt signal instructing to set the folding screen assembly to a hovering state is received; In response to the interrupt signal, determining that the current angle of the folding screen assembly has exceeded a preset angle corresponding to the hovering state, and instructing the DC motor to run in reverse; Determine that the current angle of the folding screen assembly has been reduced to a preset angle, and generate and output an instruction to stop the operation of the DC motor.

10. The control method of the folding screen assembly according to claim 7, characterized in that: The driving instruction comes from the system chip; The driving instruction is generated by the system chip based on the state change instruction and the current state confirmation information of the folding screen component.

11. The control method of the folding screen assembly according to claim 7, characterized in that: The driving instruction comes from a micro control unit; The driving instruction is generated by the microcontroller unit based on the state change instruction and the current state confirmation information of the folding screen component.

12. An electronic device, characterized in that: It comprises a first shell, a second shell and the folding screen assembly according to any one of claims 1 to 6.

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