Projection equipment, sliding cover control circuit and method

Abstract

The embodiment of the invention belongs to the technical field of projection, and provides projection equipment and a sliding cover control circuit and method, and the projection equipment comprises a main board, a display board, a limiting switch board, a sliding cover motor and a sliding cover. The display panel is connected with the main board, the limiting switch board and the sliding cover motor. The sliding cover motor is also connected with the sliding cover; the display panel is used for receiving a target command signal sent by the mainboard; the target command signal is a power-on command signal or a standby command signal; receiving a first state signal of the sliding cover sent by the limiting switch plate; the first state signal is used for representing that the sliding cover does not reach a target position corresponding to the target command signal; according to the target command signal and the first state signal, a driving signal is sent to a sliding cover motor, and the driving signal is used for indicating the sliding cover motor to drive the sliding cover to move towards the target position. According to the projection equipment, the display panel and the sliding cover control method provided by the invention, the electromagnetic compatibility problem of the sliding cover control circuit of the projection equipment can be improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of display technology, and in particular to a projection device, a sliding cover control circuit, and a method. Background Art

[0002] The lens of a projection device is typically protected by a sliding cover, which is typically controlled by a sliding cover motor and automatically opens and closes when the device is turned on or off. Existing sliding cover control circuits typically include a mainboard, display board, motor driver board, limit switch board, and sliding cover motor. These multiple modules coordinate and control each other to achieve control of the projection device's sliding cover. However, existing sliding cover control circuits for projection devices have complex and redundant circuitry, which can easily lead to electromagnetic compatibility (EMC) issues. Summary of the Invention

[0003] Embodiments of the present application provide a projection device, a slide control circuit, and a method for solving EMC problems caused by cumbersome and redundant circuits in a slide control circuit of a projection device.

[0004] In a first aspect, an embodiment of the present application provides a projection device, comprising: a main board, a display board, a limit switch board, a slide motor, and a slide; the display board is connected to the main board, the limit switch board, and the slide motor, respectively; and the slide motor is also connected to the slide;

[0005] The display panel is used for:

[0006] receiving a target command signal sent by the mainboard; the target command signal is a power-on command signal or a standby command signal;

[0007] receiving a first state signal of the slide sent by the limit switch plate; the first state signal is used to indicate that the slide has not reached the target position corresponding to the target command signal;

[0008] A driving signal is sent to the slide motor according to the target command signal and the first state signal, wherein the driving signal is used to instruct the slide motor to drive the slide to move toward the target position.

[0009] Optionally, the display panel includes a control unit and a configurable hybrid logic unit; the control unit is connected to the main board, the configurable hybrid logic unit, and the limit switch board respectively, and the configurable hybrid logic unit is also connected to the sliding cover motor;

[0010] The control unit is used to:

[0011] receiving a target command signal sent by the main board, and receiving the first state signal sent by the limit switch board;

[0012] generating a rotation direction signal of the sliding motor according to the target command signal and the first state signal;

[0013] An enable signal and the motor rotation direction signal are sent to the configurable hybrid logic unit; the enable signal is used to enable the configurable hybrid logic unit to send a drive signal to the sliding motor according to the motor rotation direction signal.

[0014] Optionally, the configurable hybrid logic unit includes: a communication module, a control module, and a drive output module; the communication module is connected to the control unit, the control module, and the drive output module respectively, and the control module is also connected to the drive output module;

[0015] The communication module is configured to receive the enable signal and the motor rotation direction signal, and send the enable signal to the control module and send the enable signal and the motor rotation direction signal to the drive output module;

[0016] The control module is configured to send a control signal to the drive output module based on the enable signal; the control signal is configured to control the drive frequency of the drive output module;

[0017] The driving output module is used to send a driving signal to the sliding cover motor according to the driving frequency based on the motor rotation direction signal.

[0018] Optionally, the configurable hybrid logic unit further includes: a target interface; the target interface is connected to the control module and the drive output module respectively;

[0019] The target interface is used to receive a level signal;

[0020] The control module is configured to determine a driving mode of the sliding cover motor according to the level signal and send a control signal corresponding to the driving mode to the driving output module; different driving modes correspond to different level signals;

[0021] The driving output module is used to determine the motor control parameters according to the level signal, and generate the driving signal according to the motor control parameters.

[0022] Optionally, the control unit is further configured to receive a second state signal of the slide cover sent by the limit switch plate, and send a disable signal to the communication module, wherein the second state signal is used to indicate that the slide cover has reached the target position corresponding to the target command signal;

[0023] The communication module is used to send the disabling signal to the control module and the drive output module.

[0024] Optionally, the projection device further includes: a power supply board; the power supply board is connected to the main board and the display board respectively, and is connected to the limit switch board through the display board;

[0025] The power supply board is used to supply power to the main board, the display board and the limit switch board.

[0026] In a second aspect, the present application provides a slide control circuit, which is applied to a projection device and includes: a main board, a display board, a limit switch board, a slide motor, and a slide; the display board is connected to the main board, the limit switch board, and the slide motor respectively; the slide motor is also connected to the slide;

[0027] The display panel is used for:

[0028] receiving a target command signal sent by the mainboard; the target command signal is a power-on command signal or a standby command signal;

[0029] receiving a first state signal of the slide sent by the limit switch plate; the first state signal is used to indicate that the slide has not reached the target position corresponding to the target command signal;

[0030] A driving signal is sent to the slide motor according to the target command signal and the first state signal, wherein the driving signal is used to instruct the slide motor to drive the slide to move toward the target position.

[0031] In a third aspect, the present application provides a sliding cover control method, which is applied to the projection device according to any one of the first aspects, and the method includes:

[0032] The display panel receives a target command signal sent by the main board; the target command signal is a power-on command signal or a standby command signal;

[0033] The display panel receives a first state signal of the slide sent by the limit switch panel; the first state signal is used to indicate that the slide has not reached the target position corresponding to the target command signal;

[0034] The display panel sends a driving signal to the slide motor according to the target command signal and the first state signal, and the driving signal is used to instruct the slide motor to drive the slide to move toward the target position.

[0035] Optionally, the display panel includes a control unit and a configurable hybrid logic unit; the control unit is connected to the main board, the configurable hybrid logic unit, and the limit switch board respectively, and the configurable hybrid logic unit is also connected to the sliding cover motor;

[0036] The control unit receives the target command signal sent by the main board, and receives the first state signal sent by the limit switch board;

[0037] The control unit generates a rotation direction signal of the sliding motor according to the target command signal and the first state signal;

[0038] The control unit sends an enable signal and the motor rotation direction signal to the configurable hybrid logic unit; the enable signal is used to enable the configurable hybrid logic unit to send a drive signal to the sliding motor according to the motor rotation direction signal.

[0039] Optionally, the configurable hybrid logic unit includes: a communication module, a control module, and a drive output module; the communication module is connected to the control unit, the control module, and the drive output module respectively, and the control module is also connected to the drive output module;

[0040] The communication module receives the enable signal and the motor rotation direction signal, sends the enable signal to the control module, and sends the enable signal and the motor rotation direction signal to the drive output module;

[0041] The control module sends a control signal to the drive output module based on the enable signal; the control signal is used to control the drive frequency of the drive output module;

[0042] The driving output module sends a driving signal to the sliding motor according to the driving frequency based on the motor rotation direction signal.

[0043] The projection device, slider control circuit, and method provided in this embodiment include a slider drive circuit comprising only a mainboard, a display panel, a limit switch panel, a slider motor, and a slider; the display panel is connected to the mainboard, the limit switch panel, and the slider motor, respectively; and the slider motor is also connected to the slider. Compared to the prior art, this application eliminates the motor drive panel, controlling the direction and speed of rotation of the slider motor solely through the display panel. This approach not only eliminates the need for production line programming of the motor drive panel but also simplifies the structure of the slider control circuit of the projection device, reducing unnecessary wiring and thus saving space. It also avoids EMC issues caused by redundant wiring. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the implementation methods in the embodiments of the present application or related technologies, a brief introduction will be given below to the drawings required for use in the embodiments or related technology descriptions. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0045] Figure 1 It is a structural schematic diagram of a projection device;

[0046] Figure 2 is a schematic diagram of a projection lens slide cover;

[0047] Figure 3 A schematic diagram of a sliding cover control circuit provided by the prior art;

[0048] Figure 4 A schematic structural diagram of a projection device provided in an embodiment of the present application;

[0049] Figure 5 A schematic structural diagram of a second projection device provided in an embodiment of the present application;

[0050] Figure 6 A schematic structural diagram of a third projection device provided in an embodiment of the present application;

[0051] Figure 7 A schematic structural diagram of a fourth projection device provided in an embodiment of the present application;

[0052] Figure 8 A flowchart of a sliding cover control method provided in an embodiment of the present application;

[0053] Figure 9 A flowchart of a second sliding cover control method provided in an embodiment of the present application;

[0054] Figure 10 This is a flow chart of a third sliding cover control method provided in an embodiment of the present application.

[0055] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0056] In order to make the purpose, implementation mode and advantages of the present application clearer, the exemplary implementation mode of the present application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0057] It should be noted that the brief descriptions of terms in this application are only for the purpose of facilitating the understanding of the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise specified, these terms should be understood according to their ordinary and usual meanings.

[0058] In addition, the terms "comprises" and "comprising" and any variations thereof are intended to cover but not exclude inclusion, for example, a product or device comprising a list of components is not necessarily limited to those components expressly listed but may include other components not expressly listed or inherent to such product or device.

[0059] The following is an exemplary description of the architecture of the projection device mentioned in this application. The projection device mentioned in this application can be a common light source projection device, such as an LED light source projection device, or a laser light source projection device, which is not limited in this application.

[0060] Figure 1 This is a structural diagram of a projection device. Figure 1 As shown in the figure, after the upper shell of the projection device is disassembled, the internal structure is divided according to optical function, and can include a light source 100, an optical engine 200, and a projection lens 300. Among them, the optical engine 200 may include light modulation components, such as phase light modulators (PLMs) such as light rods and relay lenses, and amplitude modulation devices.

[0061] Projection equipment often protects the projection lens by installing an automatic sliding cover on the upper housing. Figure 2 Schematic diagram of a projection lens slide cover. Figure 2 As shown, when the projection device is closed, the slide cover blocks the projection lens. When the device is turned on, the slide cover motor controls the upper cover to open. After the slide cover is fully opened, the picture begins to display normally. When the device is closed, the picture is first turned off, the lens no longer emits light, and then the slide cover motor controls the slide cover to slowly close fully, and the device is turned off or enters standby mode.

[0062] Figure 3 A schematic diagram of a sliding cover control circuit provided by the prior art is shown in FIG. Figure 3 As shown, the existing slider control circuit includes a main board, a display board, a motor drive board, a limit switch board, a slider motor, and a slider. The display board includes a main microcontroller unit (MCU), while the motor drive board includes a secondary MCU and a driver integrated circuit (IC). The slider function of a projection device requires controlling the speed and direction of the slider motor. Currently, the motor drive board in the slider control circuit controls the speed and direction of the slider motor.

[0063] For example, continue to refer to Figure 3 When the projection device receives the power-on command, the mainboard sends a "power-on remote control command signal" to the display board's main MCU. The display board is connected to the motor driver board. After receiving the "power-on remote control command signal," the display board's main MCU transmits the "power-on command signal" to the motor driver board's sub-MCU. The limit switch board is connected to the motor driver board. Synchronously, the limit switch board transmits the slider's current position signal, the "not fully open state signal," to the motor driver board's sub-MCU. After receiving these two signals, the motor driver board's sub-MCU transmits the "Pulse Width Modulation (PWM) control signal," the "enable signal," and the "direction signal" to the driver IC. The PWM signal is used to control the slider motor's rotational frequency (or speed), while the direction signal is used to control the slider motor's rotational direction. The motor driver board is connected to the slider motor. After receiving these signals, the motor driver board outputs corresponding motor drive signals to the slider motor to control its rotation. When the slider is fully opened, the limit switch board transmits its current position signal ("fully open state signal") to the motor driver board's slave MCU. The motor driver board's slave MCU then stops issuing "PWM control signals" and simultaneously transmits a "slider opening completion signal" back to the display board's master MCU. At this point, the display board's master MCU controls the device to begin normal lighting and display.

[0064] When the projector receives the standby command, the mainboard sends a "standby remote control command signal" to the display board's main MCU, controlling the projector to first turn off the lights and screen display. The display board's main MCU then transmits the "standby command signal" to the motor driver board's sub-MCU. Simultaneously, the limit switch board transmits its current position signal, the "not fully closed state signal," to the motor driver board's sub-MCU. After receiving these two signals, the internal program of the motor driver board's sub-MCU transmits the "PWM control signal," "enable signal," and "direction signal" to the motor driver IC. The motor driver board then outputs the motor drive signal to the slider motor, controlling its rotation. When the slider is fully closed, the limit switch board transmits its current position signal, the "fully closed state signal," to the motor driver board's sub-MCU. The motor driver board's sub-MCU controls the PWM control signal and simultaneously transmits the "slide closing completion signal" back to the display board's main MCU, entering standby mode.

[0065] The motor driver board used in current slider control circuits requires a separate production line programming process, which is complex. Furthermore, these motor driver boards are often incompatible with the slider control circuit, resulting in redundant interfaces and unnecessary space usage within the projection device. Furthermore, the numerous and complex wiring (including power and signal lines) within the overall circuit architecture makes existing circuits prone to EMC issues, impacting circuit performance and, in turn, the performance of the projection device.

[0066] In view of this, the present application provides a projection device, which can control the speed and rotation direction of the drive motor only by using a display panel, removes the motor drive board, simplifies the circuit structure of the sliding cover control circuit, and thus avoids the need for a separate burning program for the motor drive board. It can also avoid EMC problems caused by complex circuits and redundant connections, thereby improving the overall performance of the circuit board and even the projection device.

[0067] The technical solutions of the present application and the technical solutions of the present application are described in detail below with reference to specific embodiments. The following specific embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in certain embodiments. In the description of the present application, unless otherwise clearly specified and limited, each term should be understood in a broad sense within the art. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0068] Figure 4 This is a schematic diagram of the structure of a projection device provided in an embodiment of the present application. It should be understood that Figure 4 Only the structure of the slide control circuit in the projection device is shown, and other structures not related to this application are not shown. Figure 4 As shown, the projection device includes: a main board, a display board, a limit switch board, a slide motor, and a slide; the display board is connected to the main board, the limit switch board, and the slide motor respectively; and the slide motor is also connected to the slide.

[0069] In this application Figure 4 Based on the structure of the provided projection device, when the projection device is powered on or preparing to enter a standby or shutdown state, the mainboard sends a target command signal to the display panel. This target command signal can be a power-on command signal or a standby command signal, depending on the actual application scenario. For example, if the projection device is powered on, the target command signal is a power-on command signal; if the target device is preparing to enter a standby or shutdown state, the target command signal is a standby command signal. Accordingly, the display panel receives the target command signal sent by the mainboard.

[0070] At the same time, the display panel receives a first status signal of the slider transmitted by the limit switch board. This first status signal indicates that the slider has not reached the target position corresponding to the target command signal. The target position referred to herein is related to the target command signal. For example, if the target command signal is a power-on command signal, the target position is the position of the slider when it is fully opened; if the target command signal is a standby command signal, the target position is the position of the slider when it is fully closed.

[0071] Subsequently, after receiving the target command signal and the first status signal, the display panel sends a drive signal to the slider motor based on the target command signal and the first status signal. The drive signal is used to instruct the slider motor to move the slider to the target position. For example, if the target command signal is a power-on command signal, the display panel sends a drive signal to the slider motor based on the target command signal and the first status signal. The drive signal is used to instruct the slider motor to move the slider to the fully open position. If the target command signal is a standby command signal, the display panel sends a drive signal to the slider motor based on the target command signal and the first status signal. The drive signal is used to instruct the slider motor to move the slider to the fully closed position. The drive signal may be, for example, an "A+, A-, B+, B-" signal.

[0072] This application does not limit the circuit configuration of the mainboard, which is specifically related to the function of the projection device. The limit switch board can be any functional module capable of detecting the position of the slider, such as a position sensor. Specifically, this application does not limit the circuit implementation of the limit switch board. The slider motor can be any motor capable of driving the slider, and this application does not limit the type of slider motor or the shape of the slider. Figure 5 A schematic diagram of the structure of the second projection device provided in the embodiment of the present application is shown in FIG. Figure 5 As shown, regarding the display panel, one possible implementation method is that the display panel may include a control unit and a configurable hybrid logic unit. The control unit is connected to the main board, the configurable hybrid logic unit, and the limit switch board respectively, and the configurable hybrid logic unit is also connected to the sliding cover motor.

[0073] In this implementation, when the projection device is to be opened or closed, the control unit receives a target command signal sent by the main board, and receives a first status signal sent by the limit switch board; then, a sliding motor rotation direction signal is generated based on the target command signal and the first status signal; subsequently, the control unit sends an enable signal and a motor rotation direction signal to the configurable hybrid logic unit; the enable signal is used to enable the configurable hybrid logic unit to send a drive signal to the sliding motor according to the motor rotation direction signal.

[0074] The control unit may be, for example, an MCU. The configurable hybrid logic unit may be a logic unit programmed based on any programmable logic unit (e.g., a field programmable gate array (FPGA)). This configurable hybrid logic unit can output a PWM signal for the sliding motor and control the movement of the sliding motor based on a direction signal.

[0075] In this embodiment, the projection device's slider drive circuit includes only a mainboard, a display board, a limit switch board, a slider motor, and a slider. The display board is connected to the mainboard, limit switch board, and slider motor, respectively; the slider motor is also connected to the slider. Compared to the prior art, the projection device of this application eliminates the motor drive board, controlling the rotation direction and speed of the slider motor solely through the display board. This approach not only eliminates the need for production line programming of the motor drive board but also simplifies the structure of the projection device's slider control circuit, reducing unnecessary wiring and thus saving space. It also avoids EMC issues caused by redundant wiring.

[0076] The configurable hybrid logic unit is described in detail below through specific embodiments.

[0077] Figure 6 This is a schematic diagram of the structure of the third projection device provided in the embodiment of the present application, as shown in FIG. Figure 6 As shown, a possible implementation method is to configure a hybrid logic unit, including: a communication module, a control module, and a drive output module; the communication module is connected to the control unit, the control module and the drive output module respectively, and the control module is also connected to the drive output module.

[0078] The communication module may be, for example, an Inter-Integrated Circuit Bus (IICBus). The control module and the drive output module may be, for example, a logic module in a configurable hybrid logic unit.

[0079] In this implementation, when the projection device is powered on, or about to enter a shutdown or standby state, the communication module receives the enable signal and motor rotation direction signal sent by the control unit, sends the enable signal to the control module, and sends the enable signal and motor rotation direction signal to the drive output module. Subsequently, based on the enable signal, the control module sends a control signal to the drive output module; this control signal is used to control the drive frequency of the drive output module, thereby controlling the rotation speed of the sliding motor; this control signal can be, for example, a PWM signal. Based on the motor rotation direction signal, the drive output module sends a drive signal to the sliding motor, controlling the sliding motor to rotate according to the rotation speed corresponding to the drive frequency and the rotation direction indicated by the motor rotation direction signal.

[0080] In this embodiment, the configurable hybrid logic unit includes only a communication module, a control module, and a drive output module. The communication module is used for signal transmission, and the control module is used to send a control signal to the drive output module based on an acquired enable signal. This control signal controls the drive frequency of the drive output module, thereby controlling the speed of the slider motor. The drive output module is used to output a drive signal based on the control signal, the enable signal, and the motor rotation direction signal, thereby controlling the rotation of the slider motor. In this way, the configurable hybrid logic unit does not include any redundant circuits, and the entire circuit is fully adapted to the slider control requirements of projection equipment. This simplifies the slider control circuit, reduces unnecessary wiring connections, and improves the EMC issues of the slider control circuit in the prior art.

[0081] Continue to refer to Figure 6 Optionally, the configurable hybrid logic unit may further include: a target interface; the target interface is connected to the control module and the drive output module respectively.

[0082] The target interface is used to receive level signals. The level signals referred to here are high and low level signals. The level signals can be sent by the mainboard or other electrical device modules, and are not limited here.

[0083] Under the above implementation, the control module, for example, can receive a level signal obtained through a target interface, determine the drive mode of the slide motor according to the level signal, and send a control signal corresponding to the drive mode to the drive output module; different drive modes correspond to different level signals. Exemplarily, high and low level signals can, for example, correspond to different drive modes respectively. The drive mode mentioned here can, for example, be determined based on whether the slide motor is subdivided and the degree of subdivision. For example, a high level signal can correspond to subdivision (specifically, the degree of subdivision is not limited, and can be any one of 2 subdivisions, 4 subdivisions, 16 subdivisions, etc.), and a low level signal can correspond to no subdivision.

[0084] Accordingly, the drive output module can determine motor control parameters based on the level signal and generate a drive signal based on the motor control parameters. The motor control parameters can be, for example, stepping degrees, i.e., the number of degrees of rotation of the slider motor controlled by a PWM signal. For example, in the non-subdivision mode, the control module can send one PWM pulse per second. After receiving one PWM pulse, the drive output module outputs a drive signal to control the slider motor to rotate 2 degrees. Subsequently, if the control module receives a level signal (e.g., a high-level signal, depending on the actual situation) via the target interface, the drive mode changes from non-subdivision to subdivision. The PWM pulse output frequency of the control module can be changed to, for example, 4 PWM pulses per second. Accordingly, the drive output module receives the level signal via the target interface and adjusts its motor control parameters based on the level signal, for example, changing the frequency to 0.5 degrees for each PWM pulse received. By changing the motor control parameters in this manner, the drive mode of the slider motor can be adjusted.

[0085] This method allows for adjustment of the slider's motion, allowing for control of the slider's sliding mode through a single interface. This streamlined structure allows for the selection of different slider modes, enriching application scenarios and better meeting user needs. Using a higher resolution mode reduces slider motion noise, enhancing the user experience.

[0086] Optionally, the control unit may also receive a second state signal of the slide sent by the limit switch plate and send a disable signal to the communication module. The second state signal is used to indicate that the slide has reached the target position corresponding to the target command signal.

[0087] For example, when the projection device is powered on, if the slider moves to the fully open position, it indicates that the slider has reached the target position corresponding to the target command signal. At this time, the limit switch plate sends a second status signal to the control unit. After receiving the second status signal, the control unit sends a disable signal to the communication module. After receiving the enable signal, the communication module sends a disable signal to the control module and the drive output module, thereby causing the control module to stop sending control signals to the drive output module, and the drive output module also stops outputting drive signals accordingly. The slider motor stops rotating, and the slider remains at the target position corresponding to the power-on command signal.

[0088] When the projection device is turned off or in standby mode, if the slider moves to the fully closed position, it indicates that the slider has reached the target position corresponding to the target command signal. At this time, the limit switch plate sends a second status signal to the control unit. After receiving the second status signal, the control unit sends a disable signal to the communication module. After receiving the enable signal, the communication module sends a disable signal to the control module and the drive output module, causing the control module to stop sending control signals to the drive output module, and the drive output module also stops outputting drive signals. The slider motor stops rotating, and the slider remains in the target position corresponding to the standby command signal.

[0089] The projection device may be powered by an external power supply, and may also include a power board to power the circuit. Figure 7 This is a structural diagram of the fourth projection device provided in the embodiment of the present application, as shown in FIG. Figure 7 As shown, for example, the power board can be connected to the main board and the display board respectively, and connected to the limit switch board through the display board to supply power to the main board, the display board and the limit switch board.

[0090] The present application also provides a slide control circuit, which is applied to a projection device and includes: a main board, a display board, a limit switch board, a slide motor, and a slide; the display board is connected to the main board, the limit switch board, and the slide motor respectively; the slide motor is also connected to the slide;

[0091] The display panel is used for:

[0092] receiving a target command signal sent by the mainboard; the target command signal is a power-on command signal or a standby command signal;

[0093] receiving a first state signal of the slide sent by the limit switch plate; the first state signal is used to indicate that the slide has not reached the target position corresponding to the target command signal;

[0094] A driving signal is sent to the slide motor according to the target command signal and the first state signal, wherein the driving signal is used to instruct the slide motor to drive the slide to move toward the target position.

[0095] The present application also provides a sliding cover control method, which is applied to the projection device as described in any one of the above embodiments. Figure 8 A flow chart of a sliding cover control method provided in an embodiment of the present application is shown as follows: Figure 8 As shown, the method includes:

[0096] S101: The display panel receives a target command signal sent by the main board.

[0097] The target command signal is a power-on command signal or a standby command signal.

[0098] S102: The display panel receives a first state signal of the sliding cover sent by the limit switch panel.

[0099] The first state signal is used to indicate that the sliding cover has not reached the target position corresponding to the target command signal.

[0100] S103: The display panel sends a driving signal to the slide motor according to the target command signal and the first state signal. The driving signal is used to instruct the slide motor to drive the slide to move to the target position.

[0101] Optionally, the display panel includes a control unit and a configurable hybrid logic unit; the control unit is connected to the main board, the configurable hybrid logic unit, and the limit switch board respectively, and the configurable hybrid logic unit is also connected to the sliding cover motor. In this implementation, Figure 9 The flowchart of the second sliding cover control method provided in the embodiment of the present application is as follows: Figure 9 As shown, the sliding cover control method may include the following steps:

[0102] S201: The control unit receives a target command signal sent by the main board, and receives a first state signal sent by the limit switch board.

[0103] The control unit generates a sliding motor rotation direction signal according to the target command signal and the first state signal.

[0104] S202 : The control unit sends an enable signal and a motor rotation direction signal to the configurable hybrid logic unit.

[0105] The enable signal is used to enable the configurable hybrid logic unit to send a drive signal to the sliding motor according to the motor rotation direction signal.

[0106] Optionally, a hybrid logic unit may be configured, including: a communication module, a control module, and a drive output module; the communication module is connected to the control unit, the control module, and the drive output module respectively, and the control module is also connected to the drive output module.

[0107] In this implementation, Figure 10 The flowchart of the third sliding cover control method provided in the embodiment of the present application is as follows: Figure 10 As shown, the sliding cover control method may include the following steps:

[0108] S301 , the communication module receives an enable signal and a motor rotation direction signal, sends the enable signal to the control module, and sends the enable signal and the motor rotation direction signal to the drive output module.

[0109] S302 : The control module sends a control signal to the drive output module based on the enable signal; the control signal is used to control the drive frequency of the drive output module.

[0110] S303 : The drive output module sends a drive signal to the sliding motor according to the drive frequency based on the motor rotation direction signal.

[0111] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of modules is only a logical function division. In actual implementation, there may be other division methods, such as multiple modules can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interface, device or module, which can be electrical, mechanical or other forms.

[0112] Modules described as separate components may or may not be physically separate, and components shown as modules may or may not be physical units, that is, they may be located in one place or distributed across multiple network elements. Some or all of these modules may be selected to achieve the purpose of this embodiment based on actual needs.

[0113] In addition, the functional modules in the various embodiments of the present application may be integrated into a single processing unit, or each module may exist physically separately, or two or more modules may be integrated into a single unit. The above-mentioned modules may be implemented in the form of hardware or hardware plus software functional units.

[0114] The integrated modules implemented in the form of software function modules can be stored in a computer-readable storage medium. The software function modules stored in a storage medium include a number of instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) or a processor to execute some of the steps of the methods of various embodiments of the present application.

[0115] It should be understood that the processor described above may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), or application-specific integrated circuits (ASICs). A general-purpose processor may be a microprocessor or any conventional processor. The steps of the method disclosed in the application may be directly executed by a hardware processor or by a combination of hardware and software modules within the processor.

[0116] The memory may include a high-speed RAM memory, and may also include non-volatile storage NVM, such as at least one disk memory, and may also be a USB flash drive, a mobile hard disk, a read-only memory, a magnetic disk or an optical disk.

[0117] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus. Buses can be classified into address buses, data buses, and control buses. For ease of illustration, the buses in the drawings of this application are not limited to just one bus or just one type of bus.

[0118] The computer-readable storage medium may be implemented by any type of volatile or non-volatile memory device, or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The storage medium may be any available medium that can be accessed by a general-purpose or special-purpose computer.

[0119] Those skilled in the art will appreciate that all or part of the steps in the above-described method embodiments can be implemented using hardware associated with program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments. The aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0120] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

[0121] For ease of explanation, the above description has been made with reference to specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations are possible. The above embodiments are selected and described to better explain the principles and practical applications, so that those skilled in the art can better utilize the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. A projection device, characterized in that: The projection device includes: a main board, a display board, a limit switch board, a slide motor, and a slide cover; the display board is connected to the main board, the limit switch board, and the slide motor respectively; the slide motor is also connected to the slide cover; The display panel is used for: receiving a target command signal sent by the mainboard; the target command signal is a power-on command signal or a standby command signal; receiving a first state signal of the slide sent by the limit switch plate; the first state signal is used to indicate that the slide has not reached the target position corresponding to the target command signal; A driving signal is sent to the slide motor according to the target command signal and the first state signal, wherein the driving signal is used to instruct the slide motor to drive the slide to move toward the target position.

2. The projection device according to claim 1, wherein: The display panel includes a control unit and a configurable hybrid logic unit; the control unit is connected to the main board, the configurable hybrid logic unit, and the limit switch board respectively, and the configurable hybrid logic unit is also connected to the sliding cover motor; The control unit is used to: receiving a target command signal sent by the main board, and receiving the first state signal sent by the limit switch board; generating a rotation direction signal of the sliding motor according to the target command signal and the first state signal; An enable signal and the motor rotation direction signal are sent to the configurable hybrid logic unit; the enable signal is used to enable the configurable hybrid logic unit to send a drive signal to the sliding motor according to the motor rotation direction signal.

3. The projection device according to claim 2, characterized in that The configurable hybrid logic unit includes: a communication module, a control module, and a drive output module; the communication module is connected to the control unit, the control module, and the drive output module respectively, and the control module is also connected to the drive output module; The communication module is configured to receive the enable signal and the motor rotation direction signal, and send the enable signal to the control module and send the enable signal and the motor rotation direction signal to the drive output module; The control module is configured to send a control signal to the drive output module based on the enable signal; the control signal is configured to control the drive frequency of the drive output module; The driving output module is used to send a driving signal to the sliding cover motor according to the driving frequency based on the motor rotation direction signal.

4. The projection device according to claim 3, characterized in that The configurable hybrid logic unit further includes: a target interface; the target interface is connected to the control module and the drive output module respectively; The target interface is used to receive a level signal; The control module is configured to determine a driving mode of the sliding cover motor according to the level signal and send a control signal corresponding to the driving mode to the driving output module; different driving modes correspond to different level signals; The driving output module is used to determine the motor control parameters according to the level signal, and generate the driving signal according to the motor control parameters.

5. The projection device according to claim 3, characterized in that The control unit is further configured to receive a second state signal of the slide cover sent by the limit switch plate and send a disable signal to the communication module, wherein the second state signal is used to indicate that the slide cover has reached the target position corresponding to the target command signal; The communication module is used to send the disabling signal to the control module and the drive output module.

6. The projection device according to any one of claims 1 to 5, characterized in that: The projection device further includes: a power supply board; the power supply board is connected to the main board and the display board respectively, and is connected to the limit switch board through the display board; The power supply board is used to supply power to the main board, the display board and the limit switch board.

7. A sliding cover control circuit, characterized in that: The circuit is applied to a projection device, comprising: a main board, a display board, a limit switch board, a slide motor, and a slide; the display board is connected to the main board, the limit switch board, and the slide motor respectively; the slide motor is also connected to the slide; The display panel is used for: receiving a target command signal sent by the mainboard; the target command signal is a power-on command signal or a standby command signal; receiving a first state signal of the slide sent by the limit switch plate; the first state signal is used to indicate that the slide has not reached the target position corresponding to the target command signal; A driving signal is sent to the slide motor according to the target command signal and the first state signal, wherein the driving signal is used to instruct the slide motor to drive the slide to move toward the target position.

8. A sliding cover control method, characterized in that: The method is applied to the projection device according to any one of claims 1 to 6, and the method includes: The display panel receives a target command signal sent by the main board; the target command signal is a power-on command signal or a standby command signal; The display panel receives a first state signal of the slide sent by the limit switch panel; the first state signal is used to indicate that the slide has not reached the target position corresponding to the target command signal; The display panel sends a driving signal to the slide motor according to the target command signal and the first state signal, and the driving signal is used to instruct the slide motor to drive the slide to move toward the target position.

9. The method according to claim 8, characterized in that The display panel includes a control unit and a configurable hybrid logic unit; the control unit is connected to the main board, the configurable hybrid logic unit, and the limit switch board respectively, and the configurable hybrid logic unit is also connected to the sliding cover motor; The control unit receives the target command signal sent by the main board, and receives the first state signal sent by the limit switch board; The control unit generates a rotation direction signal of the sliding motor according to the target command signal and the first state signal; The control unit sends an enable signal and the motor rotation direction signal to the configurable hybrid logic unit; the enable signal is used to enable the configurable hybrid logic unit to send a drive signal to the sliding motor according to the motor rotation direction signal.

10. The sliding cover control method according to claim 9, characterized in that: The configurable hybrid logic unit includes: a communication module, a control module, and a drive output module; the communication module is connected to the control unit, the control module, and the drive output module respectively, and the control module is also connected to the drive output module; The communication module receives the enable signal and the motor rotation direction signal, sends the enable signal to the control module, and sends the enable signal and the motor rotation direction signal to the drive output module; The control module sends a control signal to the drive output module based on the enable signal; the control signal is used to control the drive frequency of the drive output module; The driving output module sends a driving signal to the sliding motor according to the driving frequency based on the motor rotation direction signal.

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