Vehicle-mounted projector screen control system and method

Abstract

The present invention discloses a vehicle-mounted projector screen control system and method, and relates to the technical field of vehicle-mounted projectors. In the present invention, when a vehicle accelerates or decelerates, a controller can control the length of a first connecting line released by a first motor to be less than a first preset length, and the first connecting line generates a pulling force to pull the projector screen tighter, which can suppress the shaking of the projector screen, and the length of the first connecting line released by the first motor is negatively correlated with the absolute value of acceleration. The greater the absolute value of acceleration, the greater the pulling force generated by the first connecting line on the projector screen, which can better suppress the shaking of the projector screen.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle-mounted projectors, and in particular to a vehicle-mounted projector screen control system and method. Background Art

[0002] With the enrichment of car cockpit entertainment scenes, the application of projectors in cockpits is becoming more and more common. The application scenarios of car projectors and indoor projectors are quite different. The screen of the car projector will shake during the driving process of the vehicle and cannot be in a stable state, which seriously affects the imaging effect and user experience. In order to improve the user experience, the industry needs to consider how to suppress the shaking of the car projector screen. Summary of the invention

[0003] The present invention solves the technical problem of how to suppress the shaking of the vehicle-mounted projector screen by providing a vehicle-mounted projector screen control system and method.

[0004] On the one hand, the embodiments of the present invention provide the following technical solutions:

[0005] A vehicle-mounted projector screen control system is applied to a vehicle-mounted projector screen, wherein the first end of the projector screen is fixed to the top of the vehicle body, and the system comprises a first connecting line, a first motor and a controller;

[0006] The second end of the projector screen is suitable for connecting to one end of a first connecting line, the other end of the first connecting line is connected to a first motor, the first motor is fixed to the vehicle floor and connected to the controller, and the first motor is used to retract or release the first connecting line;

[0007] The controller is used to obtain the acceleration of the vehicle when the projector screen is in an unfolded state, determine a first target length according to the acceleration, the first target length is negatively correlated with the absolute value of the acceleration and is less than a first preset length; and control the action of the first motor according to the first target length so that the actual length of the first connecting line between the second end of the projector screen and the first motor reaches the first target length.

[0008] Preferably, the projector screen is detachably connected to the first connecting line.

[0009] Preferably, the controller is further used to control the first motor to retract the first connecting line at a speed that is the same as the unfolding speed of the projector screen when unfolding the projector screen.

[0010] Preferably, the controller is further used to control the first motor to release the first connecting line at a speed that is the same as the retraction speed of the projector screen when the projector screen is retracted.

[0011] Preferably, the vehicle-mounted projector screen control system further includes a second connecting line and a second motor;

[0012] The second end of the projector screen is suitable for connecting to one end of a second connecting line, the other end of the second connecting line is connected to a second motor, the second motor is fixed to the vehicle floor and connected to the controller, and the second motor is used to retract or release the second connecting line;

[0013] The first motor is located directly below the projector screen, and the second motor is located behind the projector screen;

[0014] The controller is used to obtain the acceleration of the vehicle when the projector screen is in the unfolded state, determine a second target length according to the acceleration, the second target length is negatively correlated with the absolute value of the acceleration and is less than the second preset length; control the action of the second motor according to the second target length so that the actual length of the second connecting line between the second end of the projector screen and the second motor reaches the second target length.

[0015] On the other hand, the embodiment of the present invention also provides the following technical solution:

[0016] A method for controlling a screen of a vehicle-mounted projector is applied to the controller mentioned above, and the method comprises:

[0017] When the projector screen is in the unfolded state, the acceleration of the vehicle is obtained;

[0018] Determining a first target length according to the acceleration, where the first target length is negatively correlated with the absolute value of the acceleration and is less than the first preset length;

[0019] The first motor is controlled to move according to the first target length so that the actual length of the first connecting line between the second end of the projector screen and the first motor reaches the first target length.

[0020] Preferably, when the projector screen is in the unfolded state, before obtaining the acceleration of the vehicle, the method further includes:

[0021] When the projector screen is unfolded, the speed at which the first motor contracts the first connecting line is controlled to be the same as the unfolding speed of the projector screen.

[0022] Preferably, after controlling the first motor to move according to the first target length, the method further includes:

[0023] When the projector screen is retracted, the speed at which the first motor is controlled to release the first connecting line is the same as the retracting speed of the projector screen.

[0024] On the other hand, the embodiment of the present invention also provides the following technical solution:

[0025] An electronic device comprises a memory, a processor and a computer program stored in the memory and executable on the processor. When the processor executes the program, any of the above-mentioned vehicle-mounted projector screen control methods is implemented.

[0026] On the other hand, the embodiment of the present invention also provides the following technical solution:

[0027] A computer-readable storage medium stores a computer program, which implements any of the above-mentioned vehicle-mounted projector screen control methods when executed by a processor.

[0028] One or more technical solutions provided by the present invention have at least the following technical effects or advantages:

[0029] In the present invention, when the vehicle accelerates or decelerates, the controller can control the length of the first connecting line released by the first motor to be less than the first preset length. The first connecting line generates a tension to pull the projector screen tighter, which can suppress the shaking of the projector screen. The length of the first connecting line released by the first motor is negatively correlated with the absolute value of the acceleration. The larger the absolute value of the acceleration, the greater the tension generated by the first connecting line on the projector screen, which can better suppress the shaking of the projector screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0031] Figure 1 Schematic diagram of a vehicle-mounted projector screen control system in an embodiment of the present invention;

[0032] Figure 2 A schematic diagram of unfolding a projector screen in an embodiment of the present invention;

[0033] Figure 3 A schematic diagram of retracting a projector screen in an embodiment of the present invention;

[0034] Figure 4 It is a side view of a vehicle-mounted projector screen control system in an embodiment of the present invention;

[0035] Figure 5 The figure is a flow chart of a method for controlling a screen of a vehicle-mounted projector in an embodiment of the present invention. DETAILED DESCRIPTION

[0036] The embodiment of the present invention solves the technical problem of how to suppress the shaking of the vehicle-mounted projector screen by providing a vehicle-mounted projector screen control system and method.

[0037] In order to better understand the technical solution of the present invention, the technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0038] The vehicle-mounted projector screen control system of this embodiment is applied to a vehicle-mounted projector screen with flexibility, such as Figure 1 As shown, the first end of the projector screen is fixed to the top of the vehicle body, and the vehicle-mounted projector screen control system includes a first connecting line, a first motor and a controller; the second end of the projector screen is suitable for connecting to one end of the first connecting line, and the other end of the first connecting line is connected to the first motor, the first motor is fixed to the vehicle floor and connected to the controller, and the first motor is used to retract or release the first connecting line; the controller is used to obtain the acceleration of the vehicle when the projector screen is in an unfolded state, determine a first target length according to the acceleration, and the first target length is negatively correlated with the absolute value of the acceleration and is less than the first preset length; the first motor is controlled to act according to the first target length so that the actual length of the first connecting line between the second end of the projector screen and the first motor reaches the first target length.

[0039] Generally, the vehicle-mounted projector screen is fixed on the top of the vehicle body. When in use, the projector screen is controlled to slowly descend from the roof until it is fully unfolded; when not in use, the projector screen is controlled to slowly rise until it is fully retracted. In this embodiment, when the vehicle is stationary on a horizontal plane, the first motor is directly below the projector screen. When the projector screen is fully unfolded and naturally drooping, if the projector screen is connected to the first connecting line and the first connecting line is just straightened, the first connecting line does not generate tension on the projector screen, and the length of the first connecting line released by the first motor is the first preset length. Therefore, after the projector screen is connected to the first connecting line, when the vehicle is traveling at a constant speed, the length of the first connecting line released by the first motor is the first preset length; when the vehicle is accelerating, the acceleration is greater than zero, so that the length of the first connecting line released by the first motor is less than the first preset length, and the first connecting line generates a pulling force to pull the projector screen tighter, and the greater the acceleration, the shorter the length of the first connecting line released by the first motor, the greater the pulling force generated on the projector screen, and the shaking of the projector screen can be better suppressed; when the vehicle is decelerating, the acceleration is less than zero, so that the length of the first connecting line released by the first motor is less than the first preset length, and the first connecting line generates a pulling force to pull the projector screen tighter, and the smaller the acceleration, the shorter the length of the first connecting line released by the first motor, the greater the pulling force generated on the projector screen, and the shaking of the projector screen can be better suppressed. Of course, since the elasticity of the projector screen has a certain limit, the length of the first connecting line released by the first motor cannot be too short, otherwise the projector screen will be damaged.

[0040] In this embodiment, in order to facilitate the connection or disconnection of the projector screen and the first connecting line, the projector screen and the first connecting line are detachably connected, such as a common snap connection.

[0041] It can be understood that the projector screen will not only shake when it is fully extended, but also shake during the process of extension and retraction. In order to suppress the shaking of the projector screen during extension and retraction, the controller of this embodiment can also be used to control the first motor to retract the first connecting line at a speed that is the same as the extension speed of the projector screen when extending the projector screen; and to control the first motor to release the first connecting line at a speed that is the same as the retraction speed of the projector screen when retracting the projector screen.

[0042] like Figure 2 As shown, before unfolding the projector screen, the projector screen is in a completely retracted state, and the first connecting line can be connected to the second end of the projector screen, and the first connecting line is just straightened, at which time the length of the first connecting line released by the first motor reaches the maximum; when unfolding the projector screen, the projector screen slowly descends, and the speed at which the first motor retracts the first connecting line is the same as the unfolding speed of the projector screen, and the first connecting line slowly retracts until the projector screen is fully unfolded, and the length of the first connecting line released by the first motor reaches a first preset length, so that the first connecting line can suppress the shaking of the projector screen during the unfolding process. Figure 1 As shown, before the projector screen is retracted, the length of the first connecting line released by the first motor is a first preset length; Figure 3 As shown, when the projector screen is retracted, the projector screen slowly rises, and the speed at which the first motor releases the first connecting line is the same as the retraction speed of the projector screen. The first connecting line is slowly released until the projector screen is completely retracted, and the length of the first connecting line released by the first motor reaches the maximum. In this way, the first connecting line can suppress the shaking of the projector screen during the retraction process of the projector screen. At this time, the connection between the first connecting line and the projector screen can be disconnected to complete the recovery of the projector screen. Of course, since the user has no viewing demand during the unfolding and retracting of the projector screen, the requirement for suppressing the shaking of the projector screen is low, so there is no need to control the length of the released first connecting line through the acceleration of the vehicle.

[0043] In this embodiment, the projection angle of the projector of some vehicles can be changed so that the user can watch the projection while lying down. In this case, the projector screen needs to be tilted. Figure 4As shown, the vehicle-mounted projector screen control system of this embodiment also includes a second connecting line and a second motor; the second end of the projector screen is suitable for connecting to one end of the second connecting line, the other end of the second connecting line is connected to the second motor, the second motor is fixed to the vehicle floor and connected to the controller, and the second motor is used to retract or release the second connecting line; the first motor is located directly below the projector screen, and the second motor is located behind the projector screen; the controller is used to obtain the acceleration of the vehicle when the projector screen is in an unfolded state, determine a second target length according to the acceleration, the second target length is negatively correlated with the absolute value of the acceleration and is less than the second preset length; the second motor is controlled to operate according to the second target length so that the actual length of the second connecting line between the second end of the projector screen and the second motor reaches the second target length.

[0044] The working principle of the second connecting wire and the second motor is the same as that of the first connecting wire and the first motor, which will not be described here. When the user is watching the projection normally, the first connecting wire can be connected to the projector screen, and the first connecting wire and the first motor can work; when the user is lying down to watch the projection, the second connecting wire can be connected to the projector screen, and the second connecting wire and the second motor can work.

[0045] like Figure 5 As shown, this embodiment also provides a vehicle-mounted projector screen control method, which is applied to the controller mentioned above. The vehicle-mounted projector screen control method includes:

[0046] Step S1, when unfolding the projector screen, controlling the first motor to retract the first connecting line at a speed that is the same as the unfolding speed of the projector screen;

[0047] Step S2, when the projector screen is in an unfolded state, obtaining the acceleration of the vehicle;

[0048] Step S3, determining a first target length according to the acceleration, wherein the first target length is negatively correlated with the absolute value of the acceleration and is smaller than a first preset length;

[0049] Step S4, controlling the first motor to move according to the first target length so that the actual length of the first connecting line between the second end of the projector screen and the first motor reaches the first target length.

[0050] Step S5, when retracting the projector screen, controlling the first motor to release the first connecting line at a speed that is the same as the retracting speed of the projector screen.

[0051] Based on the same inventive concept as the above-mentioned vehicle-mounted projector screen control method, this embodiment also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the program, it implements the steps of any one of the above-mentioned vehicle-mounted projector screen control methods.

[0052] Among them, the bus architecture (represented by the bus), the bus can include any number of interconnected buses and bridges, and the bus links various circuits including one or more processors represented by the processor and memory represented by the memory. The bus can also link various other circuits such as peripherals, voltage regulators, and power management circuits together, which are all well known in the art and are therefore not further described herein. The bus interface provides an interface between the bus and the receiver and transmitter. The receiver and transmitter can be the same element, namely a transceiver, which provides a unit for communicating with various other devices on a transmission medium. The processor is responsible for managing the bus and general processing, while the memory can be used to store data used by the processor when performing operations.

[0053] Since the electronic device introduced in this embodiment is an electronic device used to implement the vehicle-mounted projector screen control method in the embodiment of the present invention, based on the vehicle-mounted projector screen control method introduced in the embodiment of the present invention, the technical personnel of this field can understand the specific implementation of the electronic device of this embodiment and its various variations, so how the electronic device implements the method in the embodiment of the present invention is not described in detail here. As long as the technical personnel of this field implement the electronic device used in the vehicle-mounted projector screen control method in the embodiment of the present invention, it belongs to the scope of protection of the present invention.

[0054] Based on the same inventive concept as the above-mentioned vehicle-mounted projector screen control method, the present invention also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it implements any of the above-mentioned vehicle-mounted projector screen control methods.

[0055] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0056] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0057] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0058] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0059] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0060] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A vehicle-mounted projector screen control system, applied to a vehicle-mounted projector screen, wherein the first end of the projector screen is fixed to the top of the vehicle body, characterized in that: The system includes a first connecting line, a first motor and a controller; The second end of the projector screen is suitable for connecting to one end of the first connecting line, the other end of the first connecting line is connected to the first motor, the first motor is fixed to the vehicle floor and connected to the controller, and the first motor is used to retract or release the first connecting line; The controller is used to obtain the acceleration of the vehicle when the projector screen is in the unfolded state, and determine a first target length according to the acceleration, wherein the first target length is negatively correlated with the absolute value of the acceleration and is less than a first preset length; The first motor is controlled to move according to the first target length so that an actual length of the first connecting line between the second end of the projector screen and the first motor reaches the first target length.

2. The vehicle-mounted projector screen control system according to claim 1, characterized in that: The projector screen and the first connecting line are detachably connected.

3. The vehicle-mounted projector screen control system according to claim 1, characterized in that: The controller is further configured to control the first motor to retract the first connecting line at a speed that is the same as a speed at which the projector screen is unfolded when the projector screen is unfolded.

4. The vehicle-mounted projector screen control system according to claim 1, characterized in that: The controller is further configured to control the first motor to release the first connecting line at a speed that is the same as a retraction speed of the projector screen when the projector screen is retracted.

5. The vehicle-mounted projector screen control system according to claim 1, characterized in that: Also includes a second connecting line and a second motor; The second end of the projector screen is suitable for connecting to one end of the second connecting line, the other end of the second connecting line is connected to the second motor, the second motor is fixed to the vehicle floor and connected to the controller, and the second motor is used to retract or release the second connecting line; The first motor is located directly below the projector screen, and the second motor is located behind the projector screen; The controller is used to obtain the acceleration of the vehicle when the projector screen is in the unfolded state, and determine a second target length according to the acceleration, wherein the second target length is negatively correlated with the absolute value of the acceleration and is less than a second preset length; The second motor is controlled to move according to the second target length so that the actual length of the second connecting line between the second end of the projector screen and the second motor reaches the second target length.

6. A method for controlling a screen of a vehicle-mounted projector, applied to a controller according to any one of claims 1 to 5, characterized in that: The method comprises: When the projector screen is in the unfolded state, the acceleration of the vehicle is obtained; Determining a first target length according to the acceleration, wherein the first target length is negatively correlated with an absolute value of the acceleration and is less than a first preset length; The first motor is controlled to move according to the first target length so that the actual length of the first connecting line between the second end of the projector screen and the first motor reaches the first target length.

7. The vehicle-mounted projector screen control method according to claim 6, characterized in that: When the projector screen is in the unfolded state, before obtaining the acceleration of the vehicle, the method further includes: When the projector screen is unfolded, the speed at which the first motor contracts the first connecting line is controlled to be the same as the unfolding speed of the projector screen.

8. The vehicle-mounted projector screen control method according to claim 6, characterized in that: After controlling the first motor to move according to the first target length, the method further includes: When the projector screen is retracted, the speed at which the first motor releases the first connecting line is controlled to be the same as the retracting speed of the projector screen.

9. An electronic device, characterized in that: The invention comprises a memory, a processor and a computer program stored in the memory and executable on the processor. When the processor executes the program, the vehicle-mounted projector screen control method of any one of claims 6 to 8 is implemented.

10. A computer-readable storage medium, characterized in that: A computer program is stored on a computer-readable storage medium, and when the computer program is executed by a processor, the method for controlling a vehicle-mounted projector screen of any one of claims 6 to 8 is implemented.

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