Motor driving circuit, motor driving method and display device

Abstract

The embodiment of the invention provides a motor driving circuit, a motor driving method and a display device, the motor driving circuit is applied to the display device, and the display device comprises a flexible display panel, a first driving motor and a second driving motor; the motor driving circuit is used for providing a first driving signal for the first driving motor and providing a second driving signal for the second driving motor; wherein the first driving signal is used for pre-charging the first driving motor before the first driving motor rotates, and is used for de-charging the first driving motor after the first driving motor is turned off; the second driving signal is used for pre-charging the second driving motor before the second driving motor rotates, and is used for de-charging the second driving motor after the second driving motor is turned off. According to the embodiment of the invention, the curling or unfolding of the flexible display panel can be more stably realized, so that the curling control response effect of the flexible display panel can be effectively improved.

Description

Technical Field

[0001] The present application belongs to the field of display technology, and in particular, relates to a motor driving circuit, a motor driving method and a display device. Background Art

[0002] In the field of display panel technology, with the continuous development of display technology, based on the market demand for larger and better display effects, foldable displays, sliding displays, and rollable displays have emerged. At present, the flexible display panels in organic light-emitting diode (OLED) display devices have the bendable characteristics of materials and structures, which provides the possibility for the diversity of product appearance, such as curved display devices and slidable display devices.

[0003] However, for the existing rollable display device, the problem of unstable and smooth curling or unfolding control still easily occurs during the curling process of the display panel, thereby affecting the curling control response effect of the flexible display panel. Summary of the invention

[0004] The embodiments of the present application provide a motor driving circuit, a motor driving method and a display device, which can more stably realize the curling or unfolding of the flexible display panel, thereby effectively improving the curling control response effect of the flexible display panel.

[0005] In a first aspect, an embodiment of the present application provides a motor driving circuit, which is applied to a display device, wherein the display device includes a flexible display panel, a first driving motor and a second driving motor; the first driving motor is connected to a first side of the flexible display panel, and the second driving motor is connected to a second side of the flexible display panel;

[0006] The motor driving circuit is electrically connected to the first driving motor and the second driving motor, and the first driving motor and the second driving motor are used to drive the flexible display panel to curl or unfold under the control of the motor driving circuit;

[0007] The motor driving circuit is used to provide a first driving signal to the first driving motor and a second driving signal to the second driving motor;

[0008] Among them, the first drive signal is used to pre-charge the first drive motor before the first drive motor rotates, and to de-charge the first drive motor after the first drive motor is turned off; the second drive signal is used to pre-charge the second drive motor before the second drive motor rotates, and to de-charge the second drive motor after the second drive motor is turned off.

[0009] According to the implementation scheme of the first aspect of the present application, in order to facilitate the effective smooth startup or shutdown of the first drive motor and the second drive motor, the first drive signal and the second drive signal each include N control signals, where N is a positive integer; in the motor pre-charging stage, the N control signals in the first drive signal and the second drive signal are alternately enabled to pre-charge the coils of the first drive motor and the second drive motor, respectively; in the motor rotation stage, the first drive signal is used to maintain the coil power of the first drive motor, and the second drive signal is used to maintain the coil power of the second drive motor; in the motor de-powering stage, the N control signals in the first drive signal and the second drive signal are alternately enabled to de-power the coils of the first drive motor and the second drive motor, respectively.

[0010] In this embodiment, the motor pre-charging stage, motor rotation stage and motor de-powering stage are set to control the motor system operation degree of the first drive motor and the second drive motor respectively, which is beneficial to achieve steady and smooth motor startup and motor shutdown of the first drive motor and the second drive motor, and further helps to improve the overall response rate of the motor system to operational controls such as display curling or unfolding.

[0011] According to the implementation scheme of the first aspect of the present application, in order to more reasonably achieve steady starting of the first drive motor and the second drive motor, at the start of the motor rotation phase, the motor drive circuit simultaneously sends a first starting power signal to the first drive motor and a second starting power signal to the second drive motor, so that the first drive motor and the second drive motor are started synchronously.

[0012] According to an implementation scheme of the first aspect of the present application, at a target moment in the motor rotation phase, the motor drive circuit simultaneously sends a first power-off signal to the first drive motor and a second power-off signal to the second drive motor, so that the first drive motor and the second drive motor stop rotating synchronously when the end moment of the motor power-off phase is reached; the target moment is set between the start moment of the motor rotation phase and the end moment of the motor rotation phase.

[0013] According to the implementation scheme of the first aspect of the present application, combined with the actual motor operating state, in order to facilitate the effective realization of efficient control of the motor system operating levels corresponding to the first drive motor and the second drive motor, so as to achieve more reasonable smooth starting and stopping of the motor based on the above-mentioned first drive signal and the second drive signal, in the motor pre-charging stage, any one of the N control signals includes multiple enable pulses, the pulse widths of the multiple enable pulses decrease successively, and different control signals in the N control signals appear alternately; in the motor rotation stage, any one of the N control signals includes multiple enable pulses, and the pulse widths of the multiple enable pulses are consistent; in the motor de-powering stage, any one of the N control signals includes multiple enable pulses, and the pulse widths of the multiple enable pulses increase successively.

[0014] According to the implementation scheme of the first aspect of the present application, in the motor pre-charging stage, the pulse intervals of multiple pulse signals in the N control signals decrease successively; in the motor rotation stage, the pulse intervals between any two pulse signals in the multiple pulse signals in the N control signals are the same; in the motor power-off stage, the pulse intervals of multiple pulse signals in the N control signals increase successively.

[0015] According to the implementation scheme of the first aspect of the present application, in the motor pre-charging stage, the minimum pulse width of the multiple enable pulses in the N control signals is the first pulse width; in the motor rotation stage, the pulse width of the multiple enable pulses in the N control signals is the second pulse width; in the motor power-off stage, the minimum pulse width of the multiple enable pulses in the N control signals is the third pulse width; wherein the first pulse width is greater than or equal to the second pulse width, and the second pulse width is less than or equal to the third pulse width.

[0016] According to the implementation scheme of the first aspect of the present application, the motor drive circuit includes a motor control module and a motor drive module; the motor control module is electrically connected to the control main board in the display device, and is used to receive a curling control signal sent by the control main board, and provide a drive control signal to the motor drive module in response to the curling control signal; the motor drive module is electrically connected to the first drive motor and the second drive motor respectively, and the motor drive module is used to provide a first drive signal to the first drive motor in response to the drive control signal, and provide a second drive signal to the second drive motor.

[0017] According to the implementation scheme of the first aspect of the present application, the motor drive circuit also includes a power conversion module; the power conversion module is electrically connected to the power voltage signal end, and the power conversion module is used to receive the power voltage signal provided by the power voltage signal end, and convert the power voltage signal to obtain a first target voltage signal, and supply power to the motor control module and the motor drive module according to the first target voltage signal.

[0018] According to an implementation scheme of the first aspect of the present application, the first target voltage signal includes a first voltage signal and a second voltage signal; the power conversion module includes a first power conversion sub-module and a second power conversion sub-module; the first power conversion sub-module is used to convert the power supply voltage signal into a first voltage signal, and transmit the first voltage signal to the first power signal terminal of the motor control module and the second power signal terminal of the motor drive module to provide signal power to the signal control operation of the motor control module and the motor drive module; the second power conversion sub-module is used to convert the power supply voltage signal into a second voltage signal, and transmit the second voltage signal to the third power signal terminal of the motor drive module, and the motor drive module is used to provide working power to the first drive motor and the second drive motor based on the second voltage signal.

[0019] According to an implementation of the first aspect of the present application, a voltage value of the first voltage signal is smaller than a voltage value of the second voltage signal.

[0020] According to an implementation scheme of the first aspect of the present application, the power conversion module also includes a resistance switching submodule, which includes a first resistor and a second resistor; the resistance switching submodule is electrically connected between the second power conversion submodule and the third power signal terminal of the motor drive module; the resistance switching submodule is used to switch the first resistor to the second resistor when the voltage value of the second voltage signal exceeds a preset voltage threshold; wherein the resistance value of the second resistor is greater than the resistance value of the first resistor.

[0021] According to an implementation scheme of the first aspect of the present application, the resistance switching submodule includes a first switch unit and a second switch unit; the first switch unit and the first resistor are connected in series between the second power conversion submodule and the third power signal terminal of the motor drive module, and the second switch unit and the second resistor are connected in series between the second power conversion submodule and the third power signal terminal of the motor drive module; when the voltage value of the second voltage signal exceeds a preset voltage threshold, the first switch unit is turned off and the second switch unit is turned on to switch the first resistor to the second resistor.

[0022] According to the implementation scheme of the first aspect of the present application, the voltage signal detection end of the motor drive module is electrically connected to the power supply voltage signal end; the motor drive module is also used to receive the power supply voltage signal through the voltage signal detection end, and when the power supply voltage signal exceeds a preset voltage range, send a target signal to the motor control module; the motor control module is electrically connected to the power conversion module, and the motor control module is used to send an adjustment signal corresponding to the power supply voltage signal of the power conversion module to the power conversion module in response to the target signal; the power conversion module is used to convert the power supply voltage signal in response to the adjustment signal to obtain a converted second target voltage signal.

[0023] According to an implementation of the first aspect of the present application, the second target voltage signal is smaller than the first target voltage signal.

[0024] Based on the same inventive concept, in a second aspect, an embodiment of the present application provides a motor driving method, which is applied to any implementation method provided in the first aspect of the present application: the motor driving method includes:

[0025] providing a first drive signal to the first drive motor, and providing a second drive signal to the second drive motor;

[0026] Among them, the first drive signal is used to pre-charge the first drive motor before the first drive motor rotates, and to de-charge the first drive motor after the first drive motor is turned off; the second drive signal is used to pre-charge the second drive motor before the second drive motor rotates, and to de-charge the second drive motor after the second drive motor is turned off.

[0027] Based on the same inventive concept, in a third aspect, a display device includes a motor driving circuit as in any one of the embodiments of the first aspect of the present application.

[0028] The embodiments of the present application provide a motor drive circuit, a motor drive method and a display device, wherein a first drive signal is sent to a first drive motor through a motor drive circuit, so as to pre-charge the first drive motor before the first drive motor rotates, and to de-energize the first drive motor after the first drive motor is turned off. A second drive signal is provided to a second drive motor in coordination with the motor drive circuit, so as to pre-charge the second drive motor before the second drive motor rotates, and to de-energize the second drive motor after the second drive motor is turned off. A motor drive circuit, a motor drive method and a display device according to the embodiments of the present application, by pre-charging the motors before the first drive motor and the second drive motor are officially started, and de-energizing after the first drive motor and the second drive motor are turned off, is conducive to the coordinated realization of a smoother start and shutdown of the first drive motor and the second drive motor, thereby reducing the noise generated during the start and shutdown process, so as to achieve a more stable curling or unfolding of the flexible display panel, and further effectively improve the curling control response effect of the flexible display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0030] Figure 1 is a structural schematic diagram of a motor drive circuit provided in an embodiment of the present application;

[0031] Figure 2is a schematic diagram of the motor system operation degree of the first drive motor or the second drive motor provided in an embodiment of the present application;

[0032] Figure 3 is a signal waveform diagram of a first driving signal or a second driving signal provided in an embodiment of the present application;

[0033] Figure 4 is a structural schematic diagram of another motor drive circuit provided in an embodiment of the present application;

[0034] Figure 5 is a structural schematic diagram of another motor drive circuit provided in an embodiment of the present application;

[0035] Figure 6 is a structural schematic diagram of another motor drive circuit provided in an embodiment of the present application;

[0036] Figure 7 is a structural schematic diagram of another motor drive circuit provided in an embodiment of the present application;

[0037] Figure 8 This is a schematic diagram of another motor drive circuit provided in an embodiment of the present application.

[0038] Fig. 9 is a flow chart of a motor driving method provided in an embodiment of the present application;

[0039] Fig.10 It is a structural schematic diagram of a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0040] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0041] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0042] It should be understood that the term "and / or" used in this article is only a description of the association relationship of 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.

[0043] It should be noted that the transistor in the embodiment of the present application can be an N-type transistor or a P-type transistor. For an N-type transistor, the on-level is a high level and the off-level is a low level. That is, when the gate of the N-type transistor is at a high level, the first end and the second end thereof are connected, and when the gate of the N-type transistor is at a low level, the first end and the second end thereof are disconnected. For a P-type transistor, the on-level is a low level and the off-level is a high level. That is, when the control terminal of the P-type transistor is at a low level, the first end and the second end thereof are connected, and when the control terminal of the P-type transistor is at a high level, the first end and the second end thereof are disconnected. In a specific implementation, the gate of each of the above-mentioned transistors is used as its control terminal, and, according to the signal of the gate of each transistor and its type, the first end thereof can be used as the source electrode and the second end as the drain electrode, or the first end thereof can be used as the drain electrode and the second end as the source electrode, and no distinction is made here. In addition, the on-level and the off-level in the embodiment of the present invention are both general terms, and the on-level refers to any level that can turn on the transistor, and the off-level refers to any level that can turn off / turn off the transistor.

[0044] In the embodiments of the present application, the term “electrically connected” may refer to a direct electrical connection between two components, or may refer to an electrical connection between two components via one or more other components.

[0045] In the embodiment of the present application, the first node, the second node and the third node are only defined for the convenience of describing the circuit structure, and the first node, the second node and the third node are not actual circuit units.

[0046] It is obvious to those skilled in the art that various modifications and changes can be made in the present application without departing from the spirit or scope of the present application. Therefore, the present application is intended to cover modifications and changes of the present application that fall within the scope of the corresponding claims (technical solutions for protection) and their equivalents. It should be noted that the implementation methods provided in the embodiments of the present application can be combined with each other without contradiction.

[0047] Before describing the technical solutions provided by the embodiments of the present application, in order to facilitate the understanding of the embodiments of the present application, the present application first specifically describes the problems existing in the related art:

[0048] As mentioned above, the inventors of the present application have discovered that in the related art, the display panel is still prone to curling or unfolding control being not stable and smooth enough during curling, thereby affecting the curling control response effect of the flexible display panel.

[0049] In response to the above technical problems, the embodiments of the present application provide a motor driving circuit, a motor driving method and a display device, which can solve the problem in the related art that the flexible display panel is not curled or unfolded stably and smoothly during the curling process of the display panel.

[0050] It should be noted that the embodiments provided in this application are not intended to limit the scope of the disclosure of this application.

[0051] The following first introduces the motor drive circuit provided in the embodiment of the present application. Figure 1 The schematic diagram of the structure of a motor driving circuit 10 provided in an embodiment of the present application is shown. The motor driving circuit 10 is applied to a display device, which includes a flexible display panel, a first driving motor 20 and a second driving motor 30 .

[0052] Specific as Figure 1 As shown, the first driving motor 20 is connected to the first side of the flexible display panel, and the second driving motor 30 is connected to the second side of the flexible display panel.

[0053] The motor driving circuit 10 is electrically connected to the first driving motor 20 and the second driving motor 30 respectively. The first driving motor 20 and the second driving motor 30 are used to drive the flexible display panel to curl or unfold under the control of the motor driving circuit 10 .

[0054] For example, when a display is required, the motor driving circuit 10 may control the first driving motor 20 and the second driving motor 30 to operate in coordination to expand the display area by unfolding the flexible display panel. In a scenario where display is not required, the motor driving circuit 10 may also control the first driving motor 20 and the second driving motor 30 to operate to appropriately curl the flexible display panel to reduce the space it occupies.

[0055] Specifically, the motor driving circuit 10 may be used to provide a first driving signal to the first driving motor 20 , and to provide a second driving signal to the second driving motor 30 .

[0056] The first driving signal may be used to pre-charge the first driving motor 20 before the first driving motor 20 rotates, and to de-energize the first driving motor 20 after the first driving motor 20 is turned off.

[0057] The second driving signal is used to pre-charge the second driving motor 30 before the second driving motor 30 rotates, and to de-energize the second driving motor 30 after the second driving motor 30 is turned off.

[0058] It should be noted that the shutting down of the first drive motor 20 and the second drive motor 30 may specifically mean that the first drive motor 20 and the second drive motor 30 stop rotating.

[0059] In this embodiment, pre-charging and delayed power de-energization are used to ensure that the motor operation level (for example, coil charging level) of the first drive motor 20 and the second drive motor 30 is in a stable state during the process from rotation to shutdown, thereby effectively reducing the starting noise caused by the drive motor rotating while energized during startup and the braking noise caused by the drive motor rotating while de-energized during braking.

[0060] The embodiment of the present application provides a motor drive circuit 10, through which a first drive signal is sent to a first drive motor 20, so as to pre-charge the first drive motor 20 before the first drive motor 20 rotates, and to de-energize the first drive motor 20 after the first drive motor 20 is turned off. The motor drive circuit 10 provides a second drive signal to a second drive motor 30 in coordination, so as to pre-charge the second drive motor 30 before the second drive motor 30 rotates, and to de-energize the second drive motor 30 after the second drive motor 30 is turned off.

[0061] A motor drive circuit 10 in an embodiment of the present application pre-charges the motors before the first drive motor 20 and the second drive motor 30 officially rotate, and de-charges the motors after the first drive motor 20 and the second drive motor 30 are turned off, which is conducive to coordinated realization of smoother startup and shutdown of the first drive motor 20 and the second drive motor 30, thereby reducing the noise generated during the startup and shutdown process, so that the flexible display panel can be curled or unfolded more stably, and the curling control response effect of the flexible display panel can be effectively improved.

[0062] In addition, the embodiment of the present application uses the same motor driving circuit 10 to simultaneously control and drive the first driving motor 20 and the second driving motor 30, thereby effectively saving space in the display device and facilitating coordinated control of the motors.

[0063] See below Figure 2 , Figure 2 Schematic diagram of the motor system operation degree of the first drive motor 20 or the second drive motor 30 provided in the embodiment of the present application. According to some embodiments of the present application, more specifically, in order to effectively realize the smooth start or stop of the first drive motor 20 and the second drive motor 30, optionally, the first drive signal and the second drive signal each include N control signals, where N is a positive integer.

[0064] like Figure 2 As shown, in the motor pre-charging stage T1, N control signals in the first drive signal and the second drive signal are alternately enabled to respectively pre-charge the coils of the first drive motor 20 and the second drive motor 30. Before the first drive motor 20 and the second drive motor 30 officially rotate, in the motor pre-charging stage T1, the motor system operation degree of the first drive motor 20 or the second drive motor 30 is gradually enhanced.

[0065] In the motor rotation stage T2, the first drive signal is used to maintain the coil power of the first drive motor 20, and the second drive signal is used to maintain the coil power of the second drive motor 30. In this motor rotation stage T2, the motor system operation level of the first drive motor 20 or the second drive motor 30 remains stable. In this case, when the coils of the first drive motor 20 and the second drive motor 30 are fully charged, the smooth start or smooth shutdown of the first drive motor 20 and the second drive motor 30 can be effectively achieved.

[0066] In the motor de-energizing stage T3, N control signals in the first drive signal and the second drive signal are alternately enabled to respectively de-energize the coils of the first drive motor 20 and the second drive motor 30. In the motor de-energizing stage T3, after the first drive motor 20 and the second drive motor 30 are shut down, the first drive motor 20 or the second drive motor 30 is de-energized again, and the operation degree of the motor system is gradually weakened in this stage.

[0067] In this embodiment, the motor pre-charging stage T1, the motor rotation stage T2 and the motor de-powering stage T3 are set to control the motor system operation levels of the first drive motor 20 and the second drive motor 30 respectively, which is beneficial to achieve steady and smooth motor startup and motor shutdown of the first drive motor 20 and the second drive motor 30, and further beneficial to improve the overall response rate of the motor system to operational controls such as display curling or unfolding.

[0068] According to some embodiments of the present application, optionally, please continue to refer to Figure 2 In order to more reasonably realize the steady starting of the first drive motor 20 and the second drive motor 30, at the starting time t1 of the motor rotation phase T2, the motor drive circuit 10 can simultaneously send a first starting power signal to the first drive motor 20 and a second starting power signal to the second drive motor 30, so that the first drive motor 20 and the second drive motor 30 are started synchronously.

[0069] Optionally, at the target time t2 in the motor rotation stage T2, the motor drive circuit 10 simultaneously sends a first power-off signal to the first drive motor 20 and a second power-off signal to the second drive motor 30, so that the first drive motor 20 and the second drive motor 30 stop rotating synchronously when they reach the end time of the motor power-off stage T3.

[0070] The target time t2 is set between the start time t1 of the motor rotation phase T2 and the end time t3 of the motor rotation phase T2. The specific time point of the target time t2 can be flexibly set according to the motor models of the first drive motor 20 and the second drive motor 30.

[0071] It should be emphasized that in order to facilitate the coordinated curling control or coordinated unfolding control of the flexible display panel by the first drive motor 20 and the second drive motor 30, the first start power signal and the second start power signal are synchronously sent by the motor drive circuit 10 to the corresponding drive motors, and the first shut-off power signal and the second shut-off power signal are synchronously sent by the motor drive circuit 10 to the corresponding drive motors.

[0072] See below Figure 3 , Figure 3 Schematic diagram of the signal waveform of the first drive signal or the second drive signal provided in the embodiment of the present application. According to some embodiments of the present application, optionally, in combination with the actual motor operating state, in order to facilitate the effective realization of efficient control of the motor system operating degree corresponding to the first drive motor 20 and the second drive motor 30, so as to realize more reasonable smooth motor starting and stopping based on the above-mentioned first drive signal and the second drive signal, the present embodiment further refines the waveforms of the N control signals.

[0073] like Figure 3 As shown, taking N=4 as an example, the four control signals are PhaseA, PhaseB, PhaseC and PhaseD.

[0074] In the motor pre-charging stage T1, any control signal among PhaseA, PhaseB, PhaseC and PhaseD includes a plurality of enable pulses, the pulse widths of the plurality of enable pulses decrease in sequence, and different control signals among the N control signals appear alternately.

[0075] In the motor rotation phase T2, any control signal of PhaseA, PhaseB, PhaseC and PhaseD includes a plurality of enable pulses, and the pulse widths of the plurality of enable pulses are consistent.

[0076] In the motor de-energization stage T3 , any control signal in PhaseA, PhaseB, PhaseC and PhaseD includes a plurality of enable pulses, and the pulse widths of the plurality of enable pulses increase sequentially.

[0077] According to some embodiments of the present application, optionally, continue as follows Figure 3 As shown, in the motor pre-charging stage T1, the pulse intervals of the multiple pulse signals of any control signal in PhaseA, PhaseB, PhaseC and PhaseD decrease in sequence.

[0078] In the motor rotation phase T2, for any control signal in Phase A, Phase B, Phase C and Phase D, the pulse interval between any two pulse signals of the multiple pulse signals of the control signal in this phase is the same.

[0079] In the motor de-energization stage T3 , the pulse intervals of the multiple pulse signals of any control signal in PhaseA, PhaseB, PhaseC and PhaseD increase sequentially.

[0080] More specifically, according to some embodiments of the present application, in combination with the actual motor operating state, in the motor pre-charging stage T1, the minimum pulse width of the multiple enable pulses in the N control signals is the first pulse width. In the motor rotation stage T2, the pulse width of the multiple enable pulses in the N control signals is the second pulse width. In the motor de-energizing stage T3, the minimum pulse width of the multiple enable pulses in the N control signals is the third pulse width. The first pulse width is greater than or equal to the second pulse width, and the second pulse width is less than or equal to the third pulse width.

[0081] In this embodiment, by setting the above-mentioned first pulse width to be greater than or equal to the second pulse width, and the second pulse width to be less than or equal to the third pulse width, the enable pulse widths of the N control signals in each stage change with the operating conditions of the motor, which is more conducive to achieving smooth startup or smooth shutdown of the first drive motor 20 and the second drive motor 30, thereby facilitating the reduction of noise generated during the formal startup or shutdown of the drive motor.

[0082] It needs to be added that Figure 3 In the example, N=4 is used for expansion, but in some other embodiments, the number of the above control signals can also be 3, 5, etc., which can be flexibly set in combination with the actual drive motor model and the interface configuration of the motor drive circuit 10, and this application does not impose strict restrictions on this.

[0083] See below Figure 4 , Figure 4 1 is a schematic diagram of the structure of another motor drive circuit 10 provided in an embodiment of the present application. Figure 4 As shown, according to some embodiments of the present application, more specifically, combined with actual display scenarios, in order to facilitate more efficient and accurate control of the first drive motor 20 and the second drive motor 30 by the motor drive circuit 10, the above-mentioned motor drive circuit 10 may include a motor control module 110 and a motor drive module 120.

[0084] The motor control module 110 can be electrically connected to a control mainboard in the display device. The motor control module 110 can be used to receive a curling control signal sent by the control mainboard, and provide a driving control signal to the motor driving module 120 in response to the curling control signal.

[0085] The motor driving module 120 is electrically connected to the first driving motor 20 and the second driving motor 30 respectively. The motor driving module 120 is used to provide a first driving signal to the first driving motor 20 and a second driving signal to the second driving motor 30 in response to a driving control signal.

[0086] It should be understood that, considering the motor control scenario, the motor control module 110 and the control mainboard in the display panel may be communicatively connected via a GPIO (General-Purpose Input / Output Ports) interface or the like.

[0087] In addition, in addition to receiving the curling control signal sent by the control motherboard in the display device in response, the above-mentioned motor control module 110 can also be provided with other interfaces according to actual needs. The interface can be, for example, a SWD (Serial Wire Debug) interface or a UART (Universal Asynchronous Receiver / Transmitter) interface, etc., and this application does not impose strict restrictions.

[0088] In this way, the multi-faceted command control of the motor control module 110 can be fully realized, thereby facilitating more flexible control of the first drive motor 20 and the second drive motor 30 .

[0089] See below Figure 5 , Figure 5 1 is a schematic diagram of the structure of another motor drive circuit 10 provided in an embodiment of the present application. Figure 5 As shown, according to some embodiments of the present application, optionally, the motor drive circuit 10 may further include a power conversion module 130 .

[0090] The power conversion module 130 can be electrically connected to the power voltage signal terminal DC, and the power conversion module 130 is used to receive the power voltage signal provided by the power voltage signal terminal DC. The power voltage signal can be a DC voltage signal, and its voltage value can be, for example, 12V (volts) or 5V, depending on the actual power voltage requirement.

[0091] The power conversion module 130 can be used to convert the received power voltage signal to obtain a converted first target voltage signal, and supply power to the motor control module 110 and the motor drive module 120 according to the first target voltage signal.

[0092] See below Figure 6 , Figure 6 1 is a schematic diagram of the structure of another motor drive circuit 10 provided in an embodiment of the present application. Figure 6 As shown, according to some embodiments of the present application, more specifically, the first target voltage signal may include a first voltage signal and a second voltage signal. The power conversion module 130 may include a first power conversion submodule 131 and a second power conversion submodule 132 .

[0093] Specifically, the above-mentioned first power conversion submodule 131 can be used to convert the power supply voltage signal into a first voltage signal, and transmit the first voltage signal to the first power supply signal terminal of the motor control module 110 and the second power supply signal terminal of the motor drive module 120 to provide signal power to the signal control operations of the motor control module 110 and the motor drive module 120.

[0094] The above-mentioned second power conversion submodule 132 is used to convert the power supply voltage signal into a second voltage signal, and transmit the second voltage signal to the third power supply signal terminal of the motor drive module 120. The motor drive module 120 is used to provide working power to the first drive motor 20 and the second drive motor 30 based on the second voltage signal.

[0095] Optionally, in combination with the signal power supply and working power supply requirements in an actual working scenario, the voltage value of the first voltage signal is less than the voltage value of the second voltage signal. Exemplarily, the first voltage signal may be 3.3V, for example, and the second voltage signal may be 5V, for example.

[0096] See below Figure 7 , Figure 7 1 is a schematic diagram of the structure of another motor drive circuit 10 provided in an embodiment of the present application. Figure 7 As shown, according to some embodiments of the present application, optionally, in order to effectively ensure the safety and reliability of the motor drive module 120 and related components, the above-mentioned power conversion module 130 may also include a resistance switching submodule 133, and the resistance switching submodule 133 may include a first resistor and a second resistor.

[0097] The resistance switching submodule 133 is electrically connected between the second power conversion submodule 132 and the third power signal terminal of the motor driving module 120. The resistance switching submodule 133 can be used to switch the first resistor to the second resistor when the voltage value of the second voltage signal exceeds a preset voltage threshold. The resistance value of the second resistor is greater than the resistance value of the first resistor.

[0098] In this embodiment, when the voltage value of the second voltage signal exceeds the preset voltage threshold, the first resistor is switched in the corresponding branch to introduce a second resistor with a larger resistance value to perform current limiting protection, thereby fully ensuring the safety and reliability of the motor drive module 120 and related devices connected thereto.

[0099] According to some embodiments of the present application, more specifically, in order to facilitate more reasonable and feasible switching control of the first resistor and the second resistor, the above-mentioned resistor switching submodule 133 may specifically include a first switch unit and a second switch unit.

[0100] The first switch unit and the first resistor are connected in series between the second power conversion submodule 132 and the third power signal terminal of the motor drive module 120 , and the second switch unit and the second resistor are connected in series between the second power conversion submodule 132 and the third power signal terminal of the motor drive module 120 .

[0101] In this way, when the voltage value of the second voltage signal exceeds the preset voltage threshold, the first switch unit can be turned off and the second switch unit can be turned on, so that the first resistor is switched to the second resistor.

[0102] See below Figure 8 , Figure 8 1 is a schematic diagram of the structure of another motor drive circuit 10 provided in an embodiment of the present application. Figure 8 As shown, according to some embodiments of the present application, optionally, in order to more flexibly and effectively realize the power supply to the motor control module 110 and the motor drive module 120, the voltage signal detection terminal of the above-mentioned motor drive module 120 is DC electrically connected to the power supply voltage signal terminal.

[0103] The motor drive module 120 can also be used to receive a power supply voltage signal through a voltage signal detection terminal, and send a target signal to the motor control module 110 when the power supply voltage signal exceeds a preset voltage range. The target signal can be an analog signal or a digital signal.

[0104] The motor control module 110 is electrically connected to the power conversion module 130 . The motor control module 110 can be used to send a regulation signal corresponding to the power supply voltage signal to the power conversion module 130 in response to a target signal.

[0105] The power conversion module 130 may be configured to receive the adjustment signal and convert the power voltage signal in response to the adjustment signal, thereby obtaining a converted second target voltage signal.

[0106] In this embodiment, the motor drive module 120 can directly detect the power supply voltage signal at the power supply voltage signal end DC. When the power supply voltage signal exceeds the preset voltage range, the motor control module 110 sends a target signal to enable the motor control module 110 to control the power supply signal adjustment amplitude of the power conversion module 130, thereby ensuring that the second target voltage signal finally converted by the power conversion module 130 meets the actual power supply requirements.

[0107] Optionally, considering the actual power supply scenario, the power supply voltage signal is usually prone to abnormally being too high. In this case, the second target voltage signal is smaller than the first target voltage signal.

[0108] For example, if the voltage value of the power supply voltage signal is too large, the motor control module 110 can control and adjust the power signal adjustment amplitude of the power conversion module 130, so that the voltage value of the second target voltage signal converted by the power conversion module 130 is reduced, so that the second target voltage signal finally provided to the motor control module 110 and the motor drive module 120 meets the power supply requirements.

[0109] Based on the motor driving circuit provided in the above embodiments, accordingly, the embodiments of the present application further provide a motor driving method, which is applied to the motor driving circuit provided in any of the above embodiments of the present application. Fig. 9 is a flow chart of a motor driving method provided in an embodiment of the present application. Fig. 9 As shown, the motor driving method includes:

[0110] S910, providing a first drive signal to the first drive motor, and providing a second drive signal to the second drive motor; wherein the first drive signal is used to pre-charge the first drive motor before the first drive motor rotates, and to de-charge the first drive motor after the first drive motor is turned off; the second drive signal is used to pre-charge the second drive motor before the second drive motor rotates, and to de-charge the second drive motor after the second drive motor is turned off.

[0111] Based on the motor driving circuit provided in the above embodiment, the present application also provides a display device, including the motor driving circuit provided in the above embodiment of the present application. Fig.10 , Fig.10 A schematic diagram of the structure of a display device provided in an embodiment of the present application. Fig.10 The provided display device 1000 includes the motor driving circuit 10 provided by any of the above embodiments of the present application. Fig.10 In the embodiment, a mobile phone is used as an example to illustrate the display device 1000. It can be understood that the display device provided in the embodiment of the present application can be a wearable product, a computer, a television, a car display device, or other display devices with display functions, and the present application does not impose specific restrictions on this. The display device provided in the embodiment of the present application has the beneficial effects of the motor drive circuit 10 provided in the embodiment of the present application. For details, please refer to the specific description of the motor drive circuit 10 in the above embodiments, and this embodiment will not be repeated here.

[0112] It should be understood that the specific structure of the circuit and the cross-sectional structure of the motor drive circuit provided in the drawings of the embodiments of the present application are only some examples and are not used to limit the present application. In addition, the above embodiments provided in the present application can be combined with each other if there is no contradiction.

[0113] It should be clear that each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. According to the embodiments described above in this application, these embodiments do not describe all the details in detail, nor do they limit the application to only the specific embodiments described. Obviously, many modifications and changes can be made based on the above description. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the application, so that technicians in the relevant technical field can make good use of the application and the modified use based on the application. The application is only limited by the claims and their full scope and equivalents.

[0114] Those skilled in the art should understand that the above embodiments are exemplary rather than restrictive. Different technical features appearing in different embodiments can be combined to achieve beneficial effects. Based on the study of the drawings, the specification and the claims, those skilled in the art should be able to understand and implement other variations of the disclosed embodiments. In the claims, the term "comprising" does not exclude other structures; the quantity involves "one" but does not exclude multiple; the terms "first" and "second" are used to indicate names rather than to indicate any specific order. Any figure marks in the claims should not be understood as limiting the scope of protection. The appearance of certain technical features in different dependent claims does not mean that these technical features cannot be combined to achieve beneficial effects.

Claims

1. A motor drive circuit, characterized in that: The motor driving circuit is applied to a display device, which includes a flexible display panel, a first driving motor and a second driving motor; the first driving motor is connected to a first side of the flexible display panel, and the second driving motor is connected to a second side of the flexible display panel; The motor driving circuit is electrically connected to the first driving motor and the second driving motor, and the first driving motor and the second driving motor are used to drive the flexible display panel to curl or unfold under the control of the motor driving circuit; The motor driving circuit is used to provide a first driving signal to the first driving motor and a second driving signal to the second driving motor; The first drive signal is used to pre-charge the first drive motor before the first drive motor rotates, and to de-charge the first drive motor after the first drive motor is turned off; the second drive signal is used to pre-charge the second drive motor before the second drive motor rotates, and to de-charge the second drive motor after the second drive motor is turned off.

2. The motor drive circuit according to claim 1, characterized in that: The first driving signal and the second driving signal each include N control signals, where N is a positive integer; In the motor pre-charging stage, N control signals in the first drive signal and the second drive signal are alternately enabled to pre-charge the coils of the first drive motor and the second drive motor respectively; In the motor rotation stage, the first drive signal is used to maintain the coil power of the first drive motor, and the second drive signal is used to maintain the coil power of the second drive motor; In the motor de-energization stage, N control signals in the first drive signal and the second drive signal are alternately enabled to de-energize the coils of the first drive motor and the second drive motor respectively; Preferably, at the start of the motor rotation phase, the motor drive circuit simultaneously sends a first start-up power signal to the first drive motor and sends a second start-up power signal to the second drive motor, so that the first drive motor and the second drive motor are started synchronously; Preferably, at a target moment in the motor rotation phase, the motor drive circuit simultaneously sends a first power-off signal to the first drive motor and a second power-off signal to the second drive motor, so that the first drive motor and the second drive motor stop rotating synchronously when the end moment of the motor power-off phase is reached; the target moment is set between the start moment of the motor rotation phase and the end moment of the motor rotation phase.

3. The motor drive circuit according to claim 2, characterized in that: In the motor pre-charging stage, any control signal among the N control signals includes a plurality of enable pulses, the pulse widths of the plurality of enable pulses decrease in sequence, and different control signals among the N control signals appear alternately; In the motor rotation stage, any control signal among the N control signals includes a plurality of enable pulses, and the pulse widths of the plurality of enable pulses are consistent; In the motor de-energization stage, any control signal among the N control signals includes a plurality of enable pulses, and the pulse widths of the plurality of enable pulses increase sequentially; Preferably, in the motor pre-charging stage, the pulse intervals of the plurality of pulse signals in the N control signals are reduced in sequence; In the motor rotation stage, the pulse intervals between any two pulse signals of the plurality of pulse signals in the N control signals are the same; In the motor de-energization stage, the pulse intervals of the plurality of pulse signals in the N control signals are increased sequentially; Preferably, in the motor pre-charging stage, the minimum pulse width among the multiple enable pulses in the N control signals is the first pulse width; In the motor rotation stage, the pulse width of the plurality of enable pulses in the N control signals is a second pulse width; In the motor power-off stage, the minimum pulse width among the multiple enable pulses in the N control signals is the third pulse width; The first pulse width is greater than or equal to the second pulse width, and the second pulse width is less than or equal to the third pulse width.

4. The motor drive circuit according to claim 1, characterized in that: The motor drive circuit includes a motor control module and a motor drive module; The motor control module is electrically connected to the control mainboard in the display device, and is used to receive a curling control signal sent by the control mainboard, and provide a driving control signal to the motor driving module in response to the curling control signal; The motor driving module is electrically connected to the first driving motor and the second driving motor respectively, and is used for providing the first driving signal to the first driving motor and providing the second driving signal to the second driving motor in response to the driving control signal.

5. The motor drive circuit according to claim 4, characterized in that: The motor drive circuit also includes a power conversion module; The power conversion module is electrically connected to the power voltage signal end, and is used to receive the power voltage signal provided by the power voltage signal end, convert the power voltage signal to obtain a first target voltage signal, and supply power to the motor control module and the motor drive module according to the first target voltage signal.

6. The motor drive circuit according to claim 5, characterized in that: The first target voltage signal includes a first voltage signal and a second voltage signal; the power conversion module includes a first power conversion submodule and a second power conversion submodule; The first power conversion submodule is used to convert the power supply voltage signal into the first voltage signal, and transmit the first voltage signal to the first power signal terminal of the motor control module and the second power signal terminal of the motor drive module, so as to provide signal power for the signal control operation of the motor control module and the motor drive module; The second power conversion submodule is used to convert the power supply voltage signal into the second voltage signal, and transmit the second voltage signal to the third power signal terminal of the motor drive module, and the motor drive module is used to provide working power to the first drive motor and the second drive motor based on the second voltage signal; Preferably, a voltage value of the first voltage signal is smaller than a voltage value of the second voltage signal.

7. The motor drive circuit according to claim 6, characterized in that: The power conversion module further includes a resistance switching submodule, and the resistance switching submodule includes a first resistor and a second resistor; The resistance switching submodule is electrically connected between the second power conversion submodule and the third power signal terminal of the motor driving module; the resistance switching submodule is used to switch the first resistor to the second resistor when the voltage value of the second voltage signal exceeds a preset voltage threshold; Wherein, the resistance value of the second resistor is greater than the resistance value of the first resistor; Preferably, the resistance switching submodule includes a first switch unit and a second switch unit; The first switch unit and the first resistor are connected in series between the second power conversion submodule and the third power signal terminal of the motor drive module, and the second switch unit and the second resistor are connected in series between the second power conversion submodule and the third power signal terminal of the motor drive module; When the voltage value of the second voltage signal exceeds a preset voltage threshold, the first switch unit is turned off and the second switch unit is turned on to switch the first resistor to the second resistor.

8. The motor drive circuit according to claim 5, characterized in that: The voltage signal detection terminal of the motor driving module is electrically connected to the power supply voltage signal terminal; The motor driving module is also used to receive the power supply voltage signal through the voltage signal detection end, and send a target signal to the motor control module when the power supply voltage signal exceeds a preset voltage range; The motor control module is electrically connected to the power conversion module, and the motor control module is used to send a regulation signal corresponding to the power supply voltage signal of the power conversion module to the power conversion module in response to the target signal; The power conversion module is used for converting the power voltage signal in response to the adjustment signal to obtain a converted second target voltage signal; Preferably, the second target voltage signal is smaller than the first target voltage signal.

9. A motor driving method, characterized in that: Applicable to the motor driving circuit according to any one of claims 1 to 8; the motor driving method comprises: providing a first drive signal to the first drive motor, and providing a second drive signal to the second drive motor; The first drive signal is used to pre-charge the first drive motor before the first drive motor rotates, and to de-charge the first drive motor after the first drive motor is turned off; the second drive signal is used to pre-charge the second drive motor before the second drive motor rotates, and to de-charge the second drive motor after the second drive motor is turned off.

10. A display device, characterized in that: The display device comprises the motor driving circuit according to any one of claims 1-8.

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