Display screen power supply control method and device, vehicle-mounted display screen and storage medium

Abstract

The application relates to the technical field of vehicle control, and discloses a display screen power supply control method and device, a vehicle-mounted display screen and a storage medium, the method comprising the following steps: collecting the voltage of a load circuit to obtain a load voltage; amplifying the load voltage through a differential amplification circuit to obtain an amplified load voltage; comparing the amplified load voltage with a reference voltage through a voltage comparison circuit to obtain a comparison result; and when the comparison result is that the amplified load voltage is greater than the reference voltage, controlling a power supply to maintain an abnormal display state of the display screen. Through the collection and amplification of the load voltage, when the amplified load voltage is greater than the reference voltage, the power supply is controlled to maintain the abnormal display state of the display screen, so that the problem that when the abnormal display phenomenon of the display screen needs to be reproduced, an external detection circuit needs to be connected to control the opening and closing of the power supply, resulting in a complex circuit structure and high cost, is solved, the monitoring circuit is simplified, and the circuit structure is simple and low in cost.

Description

Technical Field

[0001] This invention relates to the field of vehicle control technology, and in particular to a power control method, device, vehicle-mounted display screen, and storage medium for a display screen. Background Technology

[0002] In the development of automotive displays, lighting up the display requires coordinating the power-on and signal transmission timing among multiple companies, including car manufacturers, display manufacturers, and chip suppliers. Due to the involvement of multiple companies, the transparency between them is not very high. In the later stages of development, the screen may exhibit some abnormal displays that are difficult to reproduce. For such abnormal displays, it can be determined that there is a current abnormality, but it is uncertain where the current abnormality is located. Therefore, it is necessary to monitor the current. The phenomenon is usually reproduced by repeatedly turning the main power supply on and off to change the voltage difference. However, it is not possible to monitor manually at all times. Therefore, an external detection circuit is needed to control the power supply switching when abnormal displays occur, resulting in a complex circuit structure and high cost. Summary of the Invention

[0003] The main objective of this invention is to provide a power control method, device, vehicle display screen, and storage medium for a display screen, aiming to solve the technical problem that existing technologies require an external detection circuit to control the power supply during abnormal display phenomena, resulting in complex circuit structures and high costs.

[0004] To achieve the above objectives, the present invention provides a power supply control method for a display screen, which is applied to an in-vehicle display screen. The in-vehicle display screen includes a power supply, a load circuit, a differential amplifier circuit, and a voltage comparison circuit. The method includes the following steps:

[0005] The voltage of the load circuit is collected to obtain the load voltage;

[0006] The load voltage is amplified by the differential amplifier circuit to obtain the amplified load voltage;

[0007] The amplified load voltage is compared with the reference voltage using the voltage comparison circuit to obtain the comparison result.

[0008] When the comparison result shows that the amplified load voltage is greater than the reference voltage, the power supply is controlled to maintain the abnormal display state of the display screen.

[0009] Optionally, the vehicle-mounted display screen further includes a voltage cutoff circuit, wherein amplifying the load voltage through the differential amplifier circuit to obtain the amplified load voltage includes:

[0010] When the voltage cutoff circuit is turned on, the load voltage is sent to the differential amplifier circuit through the voltage cutoff circuit;

[0011] The load voltage is amplified by the differential amplifier circuit to obtain the amplified load voltage.

[0012] Optionally, the vehicle-mounted display screen further includes a timing circuit, and before sending the load voltage through the voltage cutoff circuit to the differential amplifier circuit when the voltage cutoff circuit is turned on, it further includes:

[0013] The timing circuit sends a level signal to the voltage cutoff circuit according to a preset power-on / off time interval.

[0014] The voltage cutoff circuit is controlled to remain in the on state according to the level signal.

[0015] Optionally, the step of controlling the power supply to maintain the abnormal display state of the screen when the comparison result shows that the amplified load voltage is greater than the reference voltage includes:

[0016] When the comparison result indicates that the amplified load voltage is greater than the reference voltage, the voltage comparison circuit outputs a high level.

[0017] The high-level signal controls the power supply to remain powered on, thereby maintaining the abnormal display state of the screen.

[0018] Optionally, the vehicle-mounted display screen further includes a relay circuit, wherein controlling the power supply to remain powered on via the high-level signal to maintain the display screen in an abnormal display state includes:

[0019] The high-level signal is input to the relay circuit;

[0020] The high-level signal controls the relay circuit to remain in the conducting state and controls the power supply to remain powered on, thereby maintaining the abnormal display state of the screen.

[0021] Optionally, after comparing the amplified load voltage with the reference voltage through the voltage comparison circuit to obtain the comparison result, the method further includes:

[0022] When the comparison result indicates that the amplified load voltage is less than or equal to the reference voltage, the voltage comparison circuit outputs a low level.

[0023] The low level controls the relay circuit to remain under the control of the timing circuit.

[0024] The relay circuit controls the power supply to power on and off based on the timing circuit.

[0025] Optionally, controlling the power supply to power on and off via the relay circuit based on the timing circuit includes:

[0026] The timing circuit sends a level signal to the voltage cutoff circuit according to a preset power-on / off time interval.

[0027] The relay circuit is turned on and off according to the level signal, so as to control the power supply to turn on and off.

[0028] Furthermore, to achieve the above objectives, the present invention also proposes a display screen power control device, the display screen power control device comprising:

[0029] The acquisition module is used to acquire the voltage of the load circuit and obtain the load voltage.

[0030] An amplification module is used to amplify the load voltage through a differential amplifier circuit to obtain an amplified load voltage;

[0031] The comparison module is used to compare the amplified load voltage with the reference voltage through a voltage comparison circuit to obtain a comparison result;

[0032] The control module is used to control the power supply to maintain the abnormal display state of the display screen when the comparison result shows that the amplified load voltage is greater than the reference voltage.

[0033] Furthermore, to achieve the above objectives, the present invention also proposes an in-vehicle display screen, which includes a timing circuit and a power supply, a relay circuit, a load circuit, a voltage cutoff circuit, a differential amplifier circuit, and a voltage comparison circuit connected in sequence. The voltage comparison circuit is also connected to the relay circuit, and the timing circuit is connected to both the relay circuit and the voltage cutoff circuit. The in-vehicle display screen is configured to implement the display screen power control method described above.

[0034] In addition, to achieve the above objectives, the present invention also proposes a storage medium storing a display power control program, wherein the display power control program, when executed by a processor, implements the steps of the display power control method as described above.

[0035] This invention obtains the load voltage by acquiring the voltage of the load circuit; amplifies the load voltage using a differential amplifier circuit; compares the amplified load voltage with a reference voltage using a voltage comparison circuit; and controls the power supply to maintain the abnormal display state of the screen when the amplified load voltage is greater than the reference voltage. By acquiring and amplifying the load voltage, and controlling the power supply when the amplified load voltage exceeds the reference voltage to maintain the abnormal display state, this invention solves the problem of complex and costly circuit structures caused by the need for external detection circuits to control the power supply during abnormal display phenomena. It simplifies the monitoring circuit, resulting in a simpler and lower-cost circuit structure. Attached Figure Description

[0036] Figure 1 This is a flowchart illustrating the first embodiment of the power control method for a display screen according to the present invention.

[0037] Figure 2 This is a schematic diagram of a vehicle-mounted display screen structure according to an embodiment of the display screen power control method of the present invention;

[0038] Figure 3 This is a flowchart illustrating the second embodiment of the power control method for a display screen according to the present invention.

[0039] Figure 4 This is a flowchart illustrating the third embodiment of the power control method for a display screen according to the present invention.

[0040] Figure 5 This is a structural block diagram of the first embodiment of the power control device for the display screen of the present invention.

[0041] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0042] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0043] like Figure 1 As shown, this embodiment of the invention provides a power control method for a display screen. Figure 1 This is a flowchart illustrating the first embodiment of the power control method for a display screen according to the present invention.

[0044] In this embodiment, the power control method for the display screen is applied to an in-vehicle display screen. The in-vehicle display screen includes a power supply, a load circuit, a differential amplifier circuit, and a voltage comparison circuit. The power control method for the display screen includes the following steps:

[0045] Step S10: Collect the voltage of the load circuit to obtain the load voltage.

[0046] It should be noted that the execution subject in this embodiment is the controller in the vehicle display screen, but it can also be other devices with the same or similar functions. This embodiment does not impose specific limitations on this. This embodiment takes the vehicle display screen as an example for specific explanation.

[0047] It is understandable that the vehicle-mounted display screen includes a timing circuit and, in sequence, a power supply, a relay circuit, a load circuit, a voltage cutoff circuit, a differential amplifier circuit, and a voltage comparator circuit. The voltage comparator circuit is also connected to the relay circuit, and the timing circuit is connected to both the relay circuit and the voltage cutoff circuit. Figure 2 As shown, Figure 2 This is a schematic diagram of the structure of an in-vehicle display screen.

[0048] It is worth noting that the main function of the load circuit is to extract electrical energy from the power source and convert it into the required form.

[0049] In this specific implementation, the load circuit in this embodiment is a power-consuming circuit on the display circuit board. It can refer to a single IC circuit, multiple power-consuming ICs, or a circuit that supplies power to the display screen. This embodiment does not impose any specific limitations on this.

[0050] It's worth noting that IC circuits, short for Integrated Circuits, are circuits that integrate multiple electronic components (such as transistors, resistors, and capacitors) onto a single semiconductor chip. The advantages of IC circuits include small size, low power consumption, high reliability, and low cost.

[0051] Step S20: The load voltage is amplified by the differential amplifier circuit to obtain the amplified load voltage.

[0052] It should be noted that the differential amplifier circuit is used to amplify the load voltage collected by the load circuit and send the amplified load voltage to the voltage comparator circuit.

[0053] Step S30: The amplified load voltage is compared with the reference voltage through the voltage comparison circuit to obtain the comparison result.

[0054] It should be noted that the load voltage is the voltage across a small resistor in the load circuit. The voltage difference is small, and after being amplified by the differential amplifier circuit, it is easy to compare with the reference voltage.

[0055] As is understandable, a voltage comparator circuit is used to compare the magnitudes of two input voltages and generate a corresponding output signal. A voltage comparator circuit typically consists of an operational amplifier and some feedback components. The output of a voltage comparator circuit is usually a digital signal, i.e., a high or low level. More functions can be achieved by connecting other circuits or components, such as LEDs or relays.

[0056] Step S40: When the comparison result shows that the amplified load voltage is greater than the reference voltage, control the power supply to maintain the abnormal display state of the display screen.

[0057] It should be noted that the power supply is used to provide power to the load circuit.

[0058] As can be understood, a reference voltage is a fixed voltage value used as a reference in a circuit. It is typically used to compare, calibrate, or control the voltage or current of other circuit components.

[0059] In a specific implementation, when the comparison result shows that the amplified load voltage is greater than the reference voltage, the voltage comparison circuit outputs a high level. The high level controls the power supply to provide power to the load circuit, keeping the screen powered on and maintaining the abnormal display state of the display screen.

[0060] This embodiment obtains the load voltage by acquiring the voltage of the load circuit; the load voltage is then amplified by a differential amplifier circuit to obtain the amplified load voltage; a voltage comparison circuit compares the amplified load voltage with a reference voltage to obtain the comparison result; when the comparison result shows that the amplified load voltage is greater than the reference voltage, the power supply is controlled to maintain the abnormal display state of the screen. By acquiring and amplifying the load voltage, and controlling the power supply when the amplified load voltage is greater than the reference voltage to maintain the abnormal display state, this method solves the problem of complex circuit structure and high cost caused by the need for an external detection circuit to control the power supply during abnormal display, thus simplifying the monitoring circuit and resulting in a simpler and lower-cost circuit structure.

[0061] refer to Figure 3 , Figure 3 This is a flowchart illustrating the second embodiment of the power control method for a display screen according to the present invention.

[0062] Based on the first embodiment described above, the vehicle-mounted display screen further includes a voltage cutoff circuit. Step S20 in the display screen power control method of this embodiment includes:

[0063] Step S201: When the voltage cutoff circuit is turned on, the load voltage is sent to the differential amplifier circuit through the voltage cutoff circuit.

[0064] It should be noted that the voltage cutoff circuit remains off for a long time, but becomes on after receiving a signal from the timing circuit.

[0065] In the specific implementation, after receiving the signal from the timing circuit, the voltage cutoff circuit changes from cutoff to conduction. When the voltage cutoff circuit is on, the load voltage is sent to the differential amplifier circuit through the voltage cutoff circuit.

[0066] Furthermore, the vehicle display screen also includes a timing circuit. Before sending the load voltage to the differential amplifier circuit through the voltage cutoff circuit when the voltage cutoff circuit is turned on, the method further includes: sending a level signal to the voltage cutoff circuit through the timing circuit according to a preset power-on / off time interval; and controlling the voltage cutoff circuit to remain in the on state according to the level signal.

[0067] It should be noted that the timing circuit is used to generate or control signals at specific time intervals. It can generate precise time delays, pulse widths, periods, and other signals according to specific application requirements. The timing circuit may include one or more of the following: RC timing circuit, 555 timer circuit, quartz crystal timing circuit, voltage regulator circuit, etc. This embodiment does not impose specific limitations on this. The RC timing circuit consists of a resistor (R) and a capacitor (C). By adjusting the values ​​of the resistor and capacitor, the time constant of the timing circuit can be determined, thereby controlling the time delay or pulse width of the output signal. The 555 timer circuit is a commonly used integrated circuit used to generate stable time delays, pulse widths, periods, and other signals. It has multiple operating modes, such as monostable, multistable, and oscillator modes, and the appropriate mode and parameters can be selected for design as needed. The quartz crystal timing circuit utilizes the resonant characteristics of a quartz crystal to generate stable frequency and periodic signals. The voltage regulator circuit achieves timing control of the circuit by controlling the stability of the current or voltage. For example, by adjusting the output voltage of the voltage regulator, the operating time of other components in the circuit can be controlled.

[0068] In practical implementation, the timing circuit can independently time how long after power-on it sends a level signal to the voltage cutoff circuit, and control the cutoff circuit to conduct through the level information, so as to transmit the collected load circuit voltage to the differential amplifier circuit.

[0069] Step S202: The load voltage is amplified by the differential amplifier circuit to obtain the amplified load voltage.

[0070] Understandably, in order to facilitate comparison with the reference voltage, the load voltage acquired by the load circuit needs to be amplified by a differential amplifier circuit to obtain the amplified load voltage.

[0071] In this embodiment, when the voltage cutoff circuit is turned on, the load voltage is sent to the differential amplifier circuit via the voltage cutoff circuit; the differential amplifier circuit amplifies the load voltage to obtain an amplified load voltage. By amplifying the load voltage via the differential amplifier circuit when the voltage cutoff circuit is turned on, it is easier to compare the load voltage with a reference voltage, thus improving the accuracy of the comparison result.

[0072] refer to Figure 4 , Figure 4 This is a flowchart illustrating the third embodiment of the power control method for a display screen according to the present invention.

[0073] Based on the first and second embodiments described above, step S40 in the display power control method of this embodiment includes:

[0074] Step S401: When the comparison result shows that the amplified load voltage is greater than the reference voltage, the voltage comparison circuit outputs a high level.

[0075] It should be noted that the voltage comparator circuit is used to compare the amplified load voltage with the reference voltage and generate a corresponding output signal, i.e., high level or low level, based on the comparison result.

[0076] In the specific implementation, when the amplified load voltage is greater than the reference voltage, the voltage comparator circuit outputs a high level.

[0077] It is understandable that a high level refers to a state where the voltage value of an electrical signal is relatively high. In digital circuits, a high level usually represents a logical "1", indicating that the signal is in a high potential state.

[0078] Step S402: The power supply is kept powered on by the high level to maintain the abnormal display state of the display screen.

[0079] It should be noted that the power-on state refers to the working state of the circuit when the power supply is turned on. The power supply is kept in the power-on state by controlling the power supply level to continuously supply power to the load circuit, so as to keep the screen from going down and maintain the abnormal display state of the display screen.

[0080] Furthermore, the vehicle-mounted display screen also includes a relay circuit. The step of controlling the power supply to remain powered on through the high level to maintain the abnormal display state of the display screen includes: inputting the high level to the relay circuit; controlling the relay circuit to remain in a conducting state through the high level, and controlling the power supply to remain powered on to maintain the abnormal display state of the display screen.

[0081] It should be noted that the relay circuit is used to control the power supply voltage. The relay circuit receives signals from the timing circuit and turns on and off at regular intervals. If it receives a high level from the voltage comparison circuit, it remains in the conducting state.

[0082] It is understandable that when the relay circuit is in the conducting state, the power supply supplies power to the load circuit through the relay circuit to keep the screen powered on and maintain the abnormal display state of the display screen.

[0083] Furthermore, after comparing the amplified load voltage with the reference voltage through the voltage comparison circuit to obtain the comparison result, the method further includes: when the comparison result is that the amplified load voltage is less than or equal to the reference voltage, outputting a low level through the voltage comparison circuit; controlling the relay circuit to remain under the control of the timing circuit through the low level; and controlling the power supply to power on and off through the relay circuit based on the timing circuit.

[0084] It should be noted that when the amplified load voltage is less than or equal to the reference voltage, the voltage comparator circuit outputs a low level. A low level means that the signal or voltage in the circuit is in a low state. In digital circuits, a low level usually represents logic 0, which means a logical "false" or "off" state.

[0085] Understandably, as long as the acquired load voltage does not exceed the reference voltage, the relay circuit will continuously receive a low level, maintaining the relay circuit under the control of the timing circuit. The timing circuit can time the time interval between the power-on and power-off of the relay circuit, thereby controlling the power supply to power on and off.

[0086] Furthermore, the step of controlling the power supply to power on and off via the relay circuit based on the timing circuit includes: sending a level signal to the voltage cutoff circuit via the timing circuit according to a preset power-on / off time interval; and controlling the relay circuit to turn on and off according to the level signal, so as to control the power supply to power on and off.

[0087] It should be noted that the timing circuit can time the power-on and power-off time intervals of the relay circuit, i.e., preset the power-on and power-off time intervals. The timing circuit sends a level signal to the voltage cutoff circuit according to the power-on and power-off time intervals, and controls the relay circuit to turn on and off through the level signal, thereby controlling the power supply to turn on and off.

[0088] It is understandable that power-on and power-off include power-on and power-off. The power supply is controlled to power on and off by controlling the relay circuit through level signals. That is, when the relay circuit is on, the power supply is powered on, and when the relay circuit is off, the power supply is powered off.

[0089] In this embodiment, when the amplified load voltage is greater than the reference voltage, the voltage comparison circuit outputs a high level; this high level controls the power supply to remain powered on, thus maintaining the abnormal display state of the screen. Through this method, when the amplified load voltage is greater than the reference voltage, the voltage comparison circuit outputs a high level to control the power supply to remain powered on, thereby maintaining the abnormal display state of the screen. The circuit structure is simple and low-cost.

[0090] Reference Figure 5 , Figure 5 This is a structural block diagram of the first embodiment of the power control device for the display screen of the present invention.

[0091] like Figure 5 As shown, the display power control device proposed in this embodiment of the invention includes:

[0092] The acquisition module 10 is used to acquire the voltage of the load circuit and obtain the load voltage.

[0093] The amplification module 20 is used to amplify the load voltage through a differential amplifier circuit to obtain the amplified load voltage.

[0094] The comparison module 30 is used to compare the amplified load voltage with the reference voltage through a voltage comparison circuit to obtain a comparison result.

[0095] The control module 40 is used to control the power supply to maintain the abnormal display state of the display screen when the comparison result is that the amplified load voltage is greater than the reference voltage.

[0096] This embodiment obtains the load voltage by acquiring the voltage of the load circuit; the load voltage is then amplified by a differential amplifier circuit to obtain the amplified load voltage; a voltage comparison circuit compares the amplified load voltage with a reference voltage to obtain the comparison result; when the comparison result shows that the amplified load voltage is greater than the reference voltage, the power supply is controlled to maintain the abnormal display state of the screen. By acquiring and amplifying the load voltage, and controlling the power supply when the amplified load voltage is greater than the reference voltage to maintain the abnormal display state, this method solves the problem of complex circuit structure and high cost caused by the need for an external detection circuit to control the power supply during abnormal display, thus simplifying the monitoring circuit and resulting in a simpler and lower-cost circuit structure.

[0097] In one embodiment, the amplification module 20 is further configured to send the load voltage to the differential amplification circuit through the voltage cutoff circuit when the voltage cutoff circuit is turned on; and amplify the load voltage through the differential amplification circuit to obtain the amplified load voltage.

[0098] In one embodiment, the amplification module 20 is further configured to send a level signal to the voltage cutoff circuit through the timing circuit according to a preset power-on / off time interval; and control the voltage cutoff circuit to remain in a conducting state according to the level signal.

[0099] In one embodiment, the control module 40 is further configured to output a high level through the voltage comparison circuit when the comparison result is that the amplified load voltage is greater than the reference voltage; and to control the power supply to remain powered on through the high level so as to maintain the abnormal display state of the display screen.

[0100] In one embodiment, the control module 40 is further configured to input the high-level signal to the relay circuit; control the relay circuit to remain in a conducting state through the high-level signal, and control the power supply to remain powered on, so as to maintain the abnormal display state of the display screen.

[0101] In one embodiment, the comparison module 30 is further configured to output a low level through the voltage comparison circuit when the comparison result is that the amplified load voltage is less than or equal to the reference voltage; control the relay circuit to maintain the state controlled by the timing circuit through the low level; and control the power supply to power on and off through the relay circuit based on the timing circuit.

[0102] In one embodiment, the comparison module 30 is further configured to send a level signal to the voltage cutoff circuit through the timing circuit according to a preset power-on / off time interval; and control the relay circuit to turn on and off according to the level signal, so as to control the power supply to power on and off.

[0103] Furthermore, to achieve the above objectives, the present invention also proposes an in-vehicle display screen, which includes a timing circuit and a power supply, a relay circuit, a load circuit, a voltage cutoff circuit, a differential amplifier circuit, and a voltage comparison circuit connected in sequence. The voltage comparison circuit is also connected to the relay circuit, and the timing circuit is connected to both the relay circuit and the voltage cutoff circuit. The in-vehicle display screen is configured to implement the display screen power control method described above.

[0104] Since this vehicle display screen adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0105] Furthermore, this embodiment of the invention also proposes a storage medium storing a display power control program, which, when executed by a processor, implements the steps of the display power control method described above.

[0106] Since this storage medium adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0107] It should be understood that the above are merely illustrative examples and do not constitute any limitation on the technical solutions of the present invention. In specific applications, those skilled in the art can make settings as needed, and the present invention does not impose any restrictions on this.

[0108] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of this invention. In practical applications, those skilled in the art can select some or all of the workflow to achieve the purpose of this embodiment according to actual needs, and no restrictions are imposed here.

[0109] In addition, for technical details not described in detail in this embodiment, please refer to the display power control method provided in any embodiment of the present invention, which will not be repeated here.

[0110] Furthermore, it should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0111] It should be understood that although the steps in the flowcharts of this application's embodiments are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some of the steps in the figures may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be performed alternately or in turn with other steps or at least a portion of the sub-steps or stages of other steps.

[0112] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0113] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as read-only memory (ROM) / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0114] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A power control method for a display screen, characterized in that, The power control method for the display screen is applied to an in-vehicle display screen, which includes a power supply, a load circuit, a differential amplifier circuit, and a voltage comparison circuit. The method includes: The voltage of the load circuit is collected to obtain the load voltage; The load voltage is amplified by the differential amplifier circuit to obtain the amplified load voltage; The amplified load voltage is compared with the reference voltage using the voltage comparison circuit to obtain the comparison result. When the comparison result indicates that the amplified load voltage is greater than the reference voltage, the power supply is controlled to maintain the abnormal display state of the display screen. The vehicle-mounted display screen further includes a voltage cutoff circuit, wherein amplifying the load voltage through the differential amplifier circuit to obtain the amplified load voltage includes: When the voltage cutoff circuit is turned on, the load voltage is sent to the differential amplifier circuit through the voltage cutoff circuit; The load voltage is amplified by the differential amplifier circuit to obtain the amplified load voltage; The vehicle-mounted display screen further includes a timing circuit, and before sending the load voltage to the differential amplifier circuit through the voltage cutoff circuit when the voltage cutoff circuit is turned on, the system further includes: The timing circuit sends a level signal to the voltage cutoff circuit according to a preset power-on / off time interval. The voltage cutoff circuit is controlled to remain in the on state according to the level signal.

2. The method as described in claim 1, characterized in that, The step of controlling the power supply to maintain the abnormal display state of the screen when the comparison result shows that the amplified load voltage is greater than the reference voltage includes: When the comparison result indicates that the amplified load voltage is greater than the reference voltage, the voltage comparison circuit outputs a high level. The high-level signal controls the power supply to remain powered on, thereby maintaining the abnormal display state of the screen.

3. The method as described in claim 2, characterized in that, The vehicle-mounted display screen also includes a relay circuit, wherein the high-level control of the power supply to maintain the power-on state in order to maintain the abnormal display state of the display screen includes: The high-level signal is input to the relay circuit; The high-level signal controls the relay circuit to remain in the conducting state and controls the power supply to remain powered on, thereby maintaining the abnormal display state of the screen.

4. The method as described in claim 3, characterized in that, After comparing the amplified load voltage with the reference voltage through the voltage comparison circuit to obtain the comparison result, the method further includes: When the comparison result indicates that the amplified load voltage is less than or equal to the reference voltage, the voltage comparison circuit outputs a low level. The low level controls the relay circuit to remain under the control of the timing circuit. The relay circuit controls the power supply to power on and off based on the timing circuit.

5. The method as described in claim 4, characterized in that, The step of controlling the power supply to power on and off via the relay circuit based on the timing circuit includes: The timing circuit sends a level signal to the voltage cutoff circuit according to a preset power-on / off time interval. The relay circuit is turned on and off according to the level signal, so as to control the power supply to turn on and off.

6. A power control device for a display screen, characterized in that, The power control device for the display screen is applied to an in-vehicle display screen, which includes a power supply, a load circuit, a differential amplifier circuit, a voltage cutoff circuit, a timing circuit, and a voltage comparison circuit. The power control device for the display screen includes: The acquisition module is used to acquire the voltage of the load circuit to obtain the load voltage; An amplification module is used to amplify the load voltage through the differential amplifier circuit to obtain an amplified load voltage; The comparison module is used to compare the amplified load voltage with the reference voltage through the voltage comparison circuit to obtain a comparison result; The control module is used to control the power supply to maintain the abnormal display state of the display screen when the comparison result shows that the amplified load voltage is greater than the reference voltage. The amplification module is further configured to send the load voltage to the differential amplification circuit through the voltage cutoff circuit when the voltage cutoff circuit is turned on; and amplify the load voltage through the differential amplification circuit to obtain the amplified load voltage. The amplification module is also used to send a level signal to the voltage cutoff circuit through the timing circuit according to a preset power-on / off time interval; and to control the voltage cutoff circuit to remain in the conducting state according to the level signal.

7. A vehicle-mounted display screen, characterized in that, The vehicle-mounted display screen includes a timing circuit and a power supply, a relay circuit, a load circuit, a voltage cutoff circuit, a differential amplifier circuit, and a voltage comparison circuit connected in sequence. The voltage comparison circuit is also connected to the relay circuit. The timing circuit is connected to the relay circuit and the voltage cutoff circuit respectively. The vehicle-mounted display screen is configured to implement the display screen power control method as described in any one of claims 1 to 5.

8. A storage medium, characterized in that, The storage medium stores a display power control program, which, when executed by a processor, implements the display power control method as described in any one of claims 1 to 5.

Images