A switching machine control system and a vehicle-mounted product

Abstract

This invention discloses a power on / off control system and an in-vehicle product. The system includes a switch module, a switch state detection module, a first enable module, a second enable module, a power output module, and a control module. The switch state detection module outputs a first-level signal when the switch module is in a closed state and a second-level signal when the switch module is in an open state. The first enable module outputs a first enable signal when the switch state detection module outputs the first-level signal. The control module controls the second enable module to output a second enable signal when the switch state detection module outputs the second-level signal and a data saving completion signal is received or the duration of the second-level signal output by the switch state detection module reaches a preset duration. The power output module outputs a power supply voltage upon receiving the first enable signal and stops outputting the power supply voltage upon receiving the second enable signal. This invention enables the in-vehicle product to power off only after data saving is complete.

Description

Technical Field

[0001] This invention relates to the field of control technology, and in particular to a power on / off control system and an in-vehicle product. Background Technology

[0002] With the rapid development of automobiles, there are more and more in-vehicle products (such as touch screens) inside cars.

[0003] When the power button of an existing in-vehicle product is pressed, it directly turns the product on or off. When the product is turned off directly, the data has not yet been saved, which can lead to data loss and program loss, resulting in poor stability and reliability of the in-vehicle product. Summary of the Invention

[0004] This invention provides a power-on / off control system and an in-vehicle product, enabling the in-vehicle product to be powered off only after data saving is complete, thereby improving the stability and reliability of the in-vehicle product.

[0005] According to one aspect of the present invention, a power on / off control system is provided, comprising: a power on / off module, a power on / off state detection module, a first enable module, a second enable module, a power output module, and a control module;

[0006] The switch state detection module is connected to the switch module. The switch state detection module is used to output a first level signal when the switch module is in the closed state and to output a second level signal when the switch module is in the open state.

[0007] The first enabling module is connected to the switch state detection module and the first enabling module is connected to the control terminal of the power output module. The first enabling module is used to output a first enabling signal to the power output module when the switch state detection module outputs the first level signal.

[0008] The control module is connected to the switch state detection module, the control module is connected to the control terminal of the second enable module, and the second enable module is connected to the control terminal of the power output module. The control module is used to control the second enable module to output a second enable signal to the power output module when the switch state detection module outputs the second level signal and receives a data saving completion signal from the device to be powered or when the duration of the second level signal output by the switch state detection module reaches a preset duration.

[0009] The first end of the power output module is connected to the first power source, and the second end of the power output module is connected to the power source of the device to be powered. The power output module is used to output a power supply voltage to the device to be powered when it receives the first enable signal, or to stop outputting the power supply voltage when it receives the second enable signal, so as to shut down the device to be powered.

[0010] Optionally, the power-on / off control system also includes an input voltage detection module;

[0011] The first end of the input voltage detection module is connected to the first power supply, and the second end of the input voltage detection module is connected to the control end of the power output module. The input voltage detection module is used to output a third enable signal to the power output module when the first power supply voltage provided by the first power supply is greater than a first preset voltage. The power output module is used to stop outputting the power supply voltage when it receives the third enable signal.

[0012] Optionally, the control module is also connected to the second terminal of the first power supply or the power output module. The control module is used to control the second enable module to output a second enable signal to the power output module when the first power supply voltage provided by the first power supply or the power supply voltage output by the power output module is less than the second preset voltage.

[0013] Optionally, the power-on / off control system also includes an electrostatic discharge (ESD) protection module;

[0014] The first end of the electrostatic discharge protection module is connected to the second power source, and the second end of the electrostatic discharge protection module is connected to the switch status detection module.

[0015] Optionally, the first enabling module includes a first transistor and a second transistor;

[0016] The control electrode of the first transistor is connected to the switch state detection module, the first electrode of the first transistor is grounded, and the second electrode of the first transistor is connected to the control electrode of the second transistor.

[0017] The first terminal of the second transistor is connected to the second power supply, the second terminal of the second transistor is connected to the first power supply, and the second terminal of the second transistor is also connected to the control terminal of the power output module.

[0018] Optionally, the second enabling module includes a third transistor;

[0019] The control electrode of the third transistor is connected to the control module, the first electrode of the third transistor is grounded, and the second electrode of the third transistor is connected to the control terminal of the power output module.

[0020] Optionally, the power output module includes a fourth transistor;

[0021] The control electrode of the fourth transistor is connected to the first enabling module, and the control electrode of the fourth transistor is also connected to the second enabling module. The first electrode of the fourth transistor is connected to the first power supply, and the second electrode of the fourth transistor is connected to the device to be powered.

[0022] Optionally, the power-on / off control system may also include an energy storage module;

[0023] The control terminal of the power output module is connected to the first power source through the energy storage module.

[0024] Optionally, the power-on / off control system also includes a first filtering module;

[0025] The second end of the power output module is connected to the first filter module.

[0026] According to another aspect of the present invention, an in-vehicle product is provided, which includes the power on / off control system described in any embodiment of the present invention.

[0027] The technical solution of this invention, when the vehicle-mounted product is needed, involves pressing the switch module, closing the switch module, and the switch status detection module outputting a first-level signal. The first enable module outputs a first enable signal based on the first-level signal, turning on the power output module. This allows the second terminal of the power output module to output a supply voltage, powering the device to be powered (e.g., the vehicle-mounted product), thus enabling the power-on control of the vehicle-mounted product. When the vehicle-mounted product is not needed, pressing the switch module opens the switch module, and the switch status detection module outputs a second-level signal. After the control module detects the second-level signal from the switch status detection module, it will control the power output module to stop outputting the supply voltage only if it receives a data saving completion signal from the device to be powered (e.g., the vehicle-mounted product), or if the duration of the second-level signal output by the switch status detection module reaches a preset duration. This ensures that the vehicle-mounted product is powered on only after data saving is complete, improving the stability and reliability of the vehicle-mounted product. The technical solution of this invention solves the problem of data loss when vehicle-mounted products are powered off, and enables vehicle-mounted products to be powered off only after data is saved, thereby improving the stability and reliability of vehicle-mounted products.

[0028] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the circuit structure of a power-on / off control system provided in an embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of the circuit structure of another power-on / off control system provided in an embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram of the circuit structure of another power-on / off control system provided in an embodiment of the present invention. Detailed Implementation

[0033] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0034] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the term "comprising" and any variations thereof are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0035] Figure 1 This is a circuit structure diagram of a power on / off control system provided in an embodiment of the present invention. Optionally, refer to... Figure 1The power on / off control system includes: a switch module 101, a switch state detection module 102, a first enable module 103, a second enable module 104, a power output module 105, and a control module 106. The switch state detection module 102 is connected to the switch module 101 and outputs a first-level signal when the switch module 101 is in a closed state and a second-level signal when the switch module 101 is in an open state. The first enable module 103 is connected to the switch state detection module 102 and is connected to the control terminal of the power output module 105. The first enable module 103 outputs a first enable signal to the power output module 105 when the switch state detection module 102 outputs the first-level signal. The control module 106 is connected to the switch state detection module 102. The control module 106 is connected to the control terminal of the second enable module 104, and the second enable module 104 is connected to the control terminal of the power output module 105. The control module 106 is used to control the second enable module 104 to output a second enable signal to the power output module 105 when the switch state detection module 102 outputs a second level signal and receives a data saving completion signal from the device to be powered or when the duration of the second level signal output by the switch state detection module 102 reaches a preset duration. The first terminal of the power output module 105 is connected to the first power supply V1, and the second terminal Vout of the power output module 105 is connected to the power supply terminal of the device to be powered. The power output module 105 is used to output a power supply voltage to the device to be powered when it receives the first enable signal, or to stop outputting the power supply voltage when it receives the second enable signal, so as to shut down the device to be powered.

[0036] Specifically, the device to be powered can be, for example, an in-vehicle product, or a computer or server. When the in-vehicle product needs to be used, the switch module 101 is pressed, closing the switch module 101. The switch status detection module 102 detects that the switch module 101 is closed and outputs a first level signal. The first enable module 103 outputs a first enable signal based on the first level signal. The first enable signal is, for example, a low level. The first power supply voltage provided by the first power source is, for example, a 12V DC voltage, which is a high level. Then, a voltage difference is formed between the control terminal and the first terminal of the power output module 105, causing the power output module 105 to conduct. As a result, the second terminal Vout of the power output module 105 outputs the supply voltage to power the device to be powered, enabling the device to be powered to turn on and start operating (e.g., the in-vehicle product). Furthermore, when the control module 106 detects that the switch state detection module 102 outputs a first-level signal, it will not output a control signal to the second enable module 104. The second enable module 104 is in the on state by default. Alternatively, the control module 106 controls the second enable module 104 to be turned on, so that the second enable module 104 outputs a low-level signal to the control terminal of the power output module 105, thereby ensuring that the power output module 105 is turned on and that the power output module 105 supplies power to the device to be powered.

[0037] When the vehicle-mounted product is not needed, pressing the switch module 101 disconnects it. The switch status detection module 102 detects that the switch module 101 is disconnected and outputs a second-level signal. After the control module 106 detects that the switch status detection module 102 outputs the second-level signal, if the control module 106 receives a data saving completion signal from the device to be powered (e.g., the vehicle-mounted product), or if the control module 106 detects that the duration of the second-level signal output by the switch status detection module 102 reaches a preset duration, the control module 106 will control the second enable module 104 to be in the off state. The second terminal of the second enable module 104 will be a high-level signal, that is, the second enable module 104 will output a second enable signal. For example, if the second enable signal is high, the power output module 105 will not be turned on, and the second terminal Vout of the power output module 105 will stop outputting the power supply voltage, thereby turning off the device to be powered (e.g., the vehicle-mounted product). Therefore, the control module 106 will only control the power output module 105 to stop outputting the power supply voltage after receiving the data saving completion signal or detecting that the duration of the second level signal output by the switch state detection module 102 has reached the preset duration. This ensures that the vehicle product is powered off only after the data saving is completed, thus improving the stability and reliability of the vehicle product.

[0038] Wherein, the first level signal is a low level signal and the second level signal is a high level signal; or, the first level signal is a high level signal and the second level signal is a low level signal.

[0039] In this embodiment, when the vehicle-mounted product is needed, pressing the switch module closes it, and the switch status detection module outputs a first-level signal. The first enable module outputs a first enable signal based on the first-level signal, turning on the power output module. This allows the second terminal of the power output module to output a supply voltage, powering the device to be powered (e.g., the vehicle-mounted product) and enabling it to start operating. This achieves power-on control of the vehicle-mounted product. When the vehicle-mounted product is not needed, pressing the switch module opens it, and the switch status detection module outputs a second-level signal. After detecting the second-level signal from the switch status detection module, the control module will only control the power output module to stop outputting the supply voltage if it receives a data saving completion signal from the device to be powered (e.g., the vehicle-mounted product) or if the duration of the second-level signal output by the switch status detection module reaches a preset duration. This ensures that the vehicle-mounted product is powered on only after data saving is complete, improving the stability and reliability of the vehicle-mounted product. The technical solution of this embodiment solves the problem of data loss when vehicle-mounted products are powered off, and enables vehicle-mounted products to be powered off only after data saving is completed, thereby improving the stability and reliability of vehicle-mounted products.

[0040] Based on the above technical solutions, Figure 2 This is a circuit structure diagram of another power-on / off control system provided in an embodiment of the present invention. Optionally, refer to... Figure 2 The power-on / off control system also includes an input voltage detection module 201; the first end of the input voltage detection module 201 is connected to the first power supply V1, and the second end of the input voltage detection module 201 is connected to the control terminal of the power output module 105. The input voltage detection module 201 is used to output a third enable signal to the power output module 105 when the first power supply voltage provided by the first power supply V1 is greater than the first preset voltage; the power output module 105 is used to stop outputting the power supply voltage when it receives the third enable signal.

[0041] Specifically, when the input voltage detection module 201 detects that the first power supply voltage provided by the first power supply V1 is greater than the first preset voltage, it indicates that the first power supply voltage is too high and may damage the equipment to be powered. The input voltage detection module 201 outputs a third enable signal, such as a high-level signal, which makes the power output module 105 not conduct, thereby stopping the output of the power supply voltage and achieving the effect of protecting the equipment to be powered.

[0042] Optionally, the control module 106 is also connected to the second terminal Vout of the first power supply V1 or the power output module 105. The control module 106 is used to control the second enable module 104 to output a second enable signal to the power output module 105 when the first power supply voltage provided by the first power supply V1 or the power supply voltage output by the power output module 105 is less than the second preset voltage.

[0043] Specifically, please refer to Figure 2 When the control module 106 detects that the first power supply voltage is lower than the second preset voltage, indicating that the first power supply voltage is too low, the control module 106 will control the second enable module 104 to output a second enable signal to the power output module 105, causing the power output module 105 to de-conduct and thus stop outputting the power supply voltage. Therefore, it can avoid the voltage output by the power supply voltage output module 105 being too low, and avoid unstable operation of the equipment to be powered.

[0044] In another embodiment, the control module 106 can also be connected to the second terminal Vout of the power output module 105. When the power supply voltage output by the power output module 105 is less than the second preset voltage, the control module 104 can output a second enable signal to the power output module 105.

[0045] Optionally, continue to refer to Figure 2 The power-on / off control system also includes an electrostatic discharge (ESD) protection module 107; the first end of the ESD protection module 107 is connected to a second power supply, and the second end of the ESD protection module is connected to the switch status detection module 102.

[0046] Specifically, the second power supply is, for example, grounded. The electrostatic discharge (ESD) protection module 107 can prevent ESD from damaging the switch status detection module 102, and avoid ESD from affecting the first and second level signals output by the switch status detection module 102. This prevents the first enable module 103 and the second enable module 104 from misjudging the level signals output by the switch status detection module 102, thereby ensuring the accuracy of the control of the power output module 105, improving the reliability of the power on / off control system, and further improving the reliability of the vehicle-mounted product.

[0047] Figure 3 This is a circuit structure diagram of another power-on / off control system provided in an embodiment of the present invention. Optionally, refer to... Figure 3The first enabling module 103 includes a first transistor Q1 and a second transistor Q2; the control electrode of the first transistor Q1 is connected to the switch state detection module 102, the first electrode of the first transistor Q1 is grounded, and the second electrode of the first transistor Q1 is connected to the control electrode of the second transistor Q2; the first electrode of the second transistor Q2 is connected to the second power supply, the second electrode of the second transistor Q2 is connected to the first power supply V1, and the second electrode of the second transistor Q2 is also connected to the control terminal of the power output module 105.

[0048] Specifically, when the vehicle-mounted product needs to be used, pressing the switch module 101 closes the switch module 101. The switch status detection module 102 detects that the switch module 101 is closed and outputs a first level signal. For example, the first level signal is a low level signal. The first transistor Q1 is not turned on, so the second terminal of the first transistor Q1 is at a high level. The second transistor Q2 is turned on, so the second terminal of the second transistor Q2 is at a low level. That is, the output first enable signal is low level. The first power supply voltage provided by the first power supply is, for example, a 12V DC voltage, which is at a high level. Then, a voltage difference is formed between the control terminal and the first terminal of the power output module 105, causing the power output module 105 to conduct. Thus, the second terminal Vout of the power output module 105 outputs the supply voltage to power the device to be powered, enabling the device to be powered to turn on and start operating (e.g., the vehicle-mounted product).

[0049] Optionally, continue to refer to Figure 3 The second enabling module 104 includes a third transistor Q3; the control electrode of the third transistor Q3 is connected to the control module 106, the first electrode of the third transistor Q3 is grounded, and the second electrode of the third transistor Q3 is connected to the control terminal of the power output module 105.

[0050] Specifically, when the vehicle-mounted product is not needed, pressing the switch module 101 disconnects it. The switch status detection module 102 detects that the switch module 101 is disconnected and outputs a second-level signal, such as a high-level signal. After the control module 106 detects that the switch status detection module 102 outputs the second-level signal, if the control module 106 receives a data saving completion signal from the device to be powered (e.g., the vehicle-mounted product), or if the control module 106 detects that the duration of the second-level signal output by the switch status detection module 102 reaches a preset duration, the control module 106 will output a low-level signal, controlling the third transistor Q3 to be in the off state. The second terminal of the third transistor Q3 becomes a high-level signal, i.e., the third transistor Q3 outputs a second enable signal. Then, the power output module 105 is not turned on, and the second terminal Vout of the power output module 105 stops outputting the power supply voltage, causing the device to be powered (e.g., the vehicle-mounted product) to shut down. Therefore, the control module 106 will only control the power output module 105 to stop outputting the power supply voltage after receiving the data saving completion signal or detecting that the duration of the second level signal output by the switch state detection module 102 has reached the preset duration. This ensures that the vehicle product is powered off only after the data saving is completed, thus improving the stability and reliability of the vehicle product.

[0051] Optionally, continue to refer to Figure 3 The power output module 105 includes a fourth transistor Q4; the control electrode of the fourth transistor Q4 is connected to the first enable module 103, the control electrode of the fourth transistor Q4 is also connected to the second enable module 104, the first electrode of the fourth transistor Q4 is connected to the first power supply, and the second electrode of the fourth transistor Q4 is connected to the device to be powered.

[0052] Specifically, when the vehicle-mounted product needs to be used, the switch module 101 is pressed, the switch module 101 is closed, the switch status detection module 102 detects that the switch module 101 is closed, and will output a first level signal. The first enable module 103 outputs a first enable signal according to the first level signal. The first enable signal is, for example, a low level. The first power supply voltage provided by the first power supply is, for example, a 12V DC voltage, which is a high level. Then, a voltage difference is formed between the control electrode and the first electrode of the fourth transistor Q4, so that the fourth transistor Q4 is turned on. Thus, the second electrode Vout of the fourth transistor Q4 outputs the power supply voltage to power the device to be powered, so that the device to be powered is turned on and the device to be powered (e.g., the vehicle-mounted product) starts to operate. When the vehicle-mounted product is not needed, pressing the switch module 101 disconnects it. The switch status detection module 102 detects that the switch module 101 is disconnected and outputs a second-level signal. After the control module 106 detects that the switch status detection module 102 outputs the second-level signal, if the control module 106 receives a data saving completion signal from the device to be powered (e.g., the vehicle-mounted product), or if the control module 106 detects that the duration of the second-level signal output by the switch status detection module 102 reaches a preset duration, the control module 106 will control the second enable module 104 to be in the off state. The second terminal of the second enable module 104 will be a high-level signal, that is, the second enable module 104 will output a second enable signal. For example, if the second enable signal is high, the fourth transistor Q4 will not be turned on, and the second terminal Vout of the fourth transistor Q4 will stop outputting the power supply voltage, thus turning off the device to be powered (e.g., the vehicle-mounted product). Therefore, the control module 106 will only control the fourth transistor Q4 to stop outputting the power supply voltage after receiving the data saving completion signal or detecting that the duration of the second level signal output by the switch state detection module 102 has reached the preset duration. This ensures that the vehicle product is powered off only after the data saving is completed, thus improving the stability and reliability of the vehicle product.

[0053] Optionally, continue to refer to Figure 2 and Figure 3 The power on / off control system also includes an energy storage module 108; the control terminal of the power output module 105 is connected to the first power supply V1 through the energy storage module 108.

[0054] Specifically, the first power supply V1 provides the first power supply voltage. By setting up the energy storage module 108, the first power supply V1 first charges the energy storage module 108, and then the energy storage module 108 outputs voltage to the control terminal of the power output module 105, so that the power output module 105 gradually reaches the first power supply voltage, avoiding large instantaneous voltage and causing a large impact on the power output module 105, thus achieving the effect of protecting the power output module 105 and helping to extend the life of the power on / off control system.

[0055] Optionally, continue to refer to Figure 3The energy storage module 108 includes a first capacitor C1; the first terminal of the first capacitor C1 is connected to the first power supply V1, and the second terminal of the first capacitor C1 is connected to the control terminal of the power output module 105.

[0056] Specifically, the first power supply V1 first charges the first capacitor C1, and then the first capacitor C1 outputs voltage to the control terminal of the power output module 105, so that the power output module 105 gradually reaches the first power supply voltage, avoiding a large instantaneous voltage that could cause a significant impact on the power output module 105. The capacitance value of the first capacitor C1 is set to be relatively small, for example, 100nF, so that the charging and discharging time of the first capacitor C1 will not be too long, and the control module 106 implements delayed shutdown control.

[0057] Optionally, continue to refer to Figure 2 and Figure 3 The power on / off control system also includes a first filter module 109; the second terminal Vout of the power output module 105 is connected to the first filter module 109.

[0058] Specifically, by setting the first filter module 109, noise is filtered out, and the voltage output by the power output module 105 is prevented from containing too much noise, thereby providing better power to the equipment to be powered (such as vehicle products), enabling the equipment to be powered to operate stably, and improving the reliability of the power-on and power-off control system.

[0059] Optionally, continue to refer to Figure 2 and Figure 3 The power-on / off control system also includes a second filter module 110; the first end of the second filter module 110 is connected to the second power supply, and the second end of the second filter module 110 is connected to the switch status detection module 102.

[0060] Specifically, the second power supply is, for example, grounded. By setting up a second filter module 110, noise is filtered out and debouncing is performed to avoid the first and second level signals output by the switch state detection module 102 containing too much noise. This allows the control module 106 to accurately obtain the signal output by the switch state detection module 102, thereby improving the accuracy of the control module 106's judgment.

[0061] Optionally, continue to refer to Figure 3 The switch module 101 includes a first switch S1, and the switch status detection module 102 includes a status detection interface A1; the first end of the first switch S1 is grounded, and the second end of the first switch S1 is connected to the status detection interface A1.

[0062] Specifically, the first terminal of the first switch S1 is grounded. When the first switch S1 is closed, the state detection interface A1 is at a low level, that is, the switch state detection module 102 outputs a first level signal; when the first switch S1 is open, the state detection interface A1 is at a high level, that is, the switch state detection module 102 outputs a second level signal.

[0063] Optionally, continue to refer to Figure 3 The first filter module 109 includes a second capacitor C2, a third capacitor C3, a fourth capacitor C4, and a fifth capacitor C5. The first terminal of the second capacitor C2 is connected to the second terminal Vout of the power output module 105, and the second terminal of the second capacitor C2 is grounded. The second capacitor C2, the third capacitor C3, the fourth capacitor C4, and the fifth capacitor C5 are connected in parallel.

[0064] Optionally, continue to refer to Figure 3 The second filtering module 110 includes a sixth capacitor C6, the first terminal of the sixth capacitor C6 is the first terminal of the second filtering module 110, and the second terminal of the sixth capacitor C6 is the second terminal of the second filtering module 110.

[0065] Optionally, continue to refer to Figure 3 The power-on / off control system also includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, and an eleventh resistor R11. The status detection interface A1 is connected to the first terminal of the eleventh resistor R11. The second terminal of the eleventh resistor R11 is connected to the control electrode of the first transistor Q1 through the first resistor R1. The control electrode of the first transistor Q1 is grounded through the second resistor R2. The second electrode of the first transistor Q1 is connected to the first power supply V1 through the third resistor R3. The control electrode of the second transistor Q2... The control terminal of the first transistor Q1 is connected to the second terminal of the first transistor Q1 through the fourth resistor R4. The control terminal of the second transistor Q2 is grounded through the fifth resistor R5. The second terminal of the second transistor Q2 is connected to the first terminal of the sixth resistor R6. The second terminal of the sixth resistor R6 is connected to the first power supply V1 through the seventh resistor R7. The second terminal of the sixth resistor R6 is also connected to the second terminal of the first capacitor C1. The control terminal of the third transistor Q3 is grounded through the eighth resistor R8. The second terminal of the third transistor Q3 is connected to the control terminal of the fourth transistor Q4 through the ninth resistor R9. The control terminal of the third transistor Q3 is connected to the control module 106 through the tenth resistor R10.

[0066] Optionally, continue to refer to Figure 3The power-on / off control system also includes a twelfth resistor R12, a thirteenth resistor R13, and a seventh capacitor C7; the second terminal Vout of the first power supply V1 or power output module 105 is connected to the first terminal of the twelfth resistor R12, the second terminal of the twelfth resistor R12 is connected to the first terminal of the thirteenth resistor R13, the second terminal of the thirteenth resistor R13 is grounded, and the control module 106 is connected to the first terminal of the thirteenth resistor R13; the seventh capacitor C7 is connected in parallel with the thirteenth resistor R13.

[0067] Optionally, continue to refer to Figure 3 The input voltage detection module 201 includes: a Zener diode D1, a fourteenth resistor R14, a fifth transistor Q5, a fifteenth resistor R15, a sixth transistor Q6, a sixteenth resistor R16, and a seventeenth resistor R17; the first power supply V1 is connected to the first terminal of the Zener diode D1, and the second terminal of the Zener diode D1 is connected to the control terminal of the fifth transistor Q5 through the fourteenth resistor R14; the first terminal of the fifth transistor Q5 is grounded, and the second terminal of the fifth transistor Q5 is connected to the control terminal of the sixth transistor Q6 through the fifteenth resistor R15; the first terminal of the sixth transistor Q6 is connected to the first power supply V1, the control terminal of the sixth transistor Q6 is connected to the first power supply V1 through the sixteenth resistor R16, and the second terminal of the sixth transistor Q6 is connected to the control terminal of the power output module 105 through the seventeenth resistor R17.

[0068] Specifically, when the first power supply V1 is greater than the first preset voltage, the Zener diode D1 is turned on, causing the fifth transistor Q5 to turn on. The second terminal of the fifth transistor Q5 outputs a low level, causing the sixth transistor Q6 to turn on. The second terminal of the sixth transistor Q6 outputs a high level signal, i.e., outputs the third enable signal, causing the power output module 105 to turn off, thereby stopping the output of the power supply voltage. This avoids the power supply voltage output by the power output module 105 being too high, achieving the effect of protecting the power output module 105 and the device to be powered.

[0069] The technical solution of this invention also provides an in-vehicle product, which includes the power-on / off control system provided in any of the above embodiments. The in-vehicle product can be, for example, a central control screen inside a vehicle, or a dashcam or other product inside the vehicle. The technical effects of the in-vehicle product, including the power-on / off control system provided in any of the above embodiments, are similar to those of the power-on / off control system, and will not be repeated here.

[0070] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A power on / off control system, characterized in that, include: The module includes a switch module, a switch status detection module, a first enable module, a second enable module, a power output module, and a control module. The switch state detection module is connected to the switch module. The switch state detection module is used to output a first level signal when the switch module is in the closed state and to output a second level signal when the switch module is in the open state. The first enabling module is connected to the switch state detection module and the first enabling module is connected to the control terminal of the power output module. The first enabling module is used to output a first enabling signal to the power output module when the switch state detection module outputs the first level signal. The control module is connected to the switch state detection module, the control module is connected to the control terminal of the second enable module, and the second enable module is connected to the control terminal of the power output module. The control module is used to control the second enable module to output a second enable signal to the power output module when the switch state detection module outputs the second level signal and receives a data saving completion signal from the device to be powered or when the duration of the second level signal output by the switch state detection module reaches a preset duration. The first end of the power output module is connected to the first power source, and the second end of the power output module is connected to the power source of the device to be powered. The power output module is used to output a power supply voltage to the device to be powered when it receives the first enable signal, or to stop outputting the power supply voltage when it receives the second enable signal, so as to shut down the device to be powered.

2. The power on / off control system according to claim 1, characterized in that, It also includes an input voltage detection module; The first end of the input voltage detection module is connected to the first power supply, and the second end of the input voltage detection module is connected to the control end of the power output module. The input voltage detection module is used to output a third enable signal to the power output module when the first power supply voltage provided by the first power supply is greater than the first preset voltage. The power output module is used to stop outputting the power supply voltage when it receives the third enable signal.

3. The power on / off control system according to claim 1, characterized in that, The control module is also connected to the second end of the first power supply or the power output module. The control module is used to control the second enable module to output a second enable signal to the power output module when the first power supply voltage provided by the first power supply or the power supply voltage output by the power output module is less than the second preset voltage.

4. The power on / off control system according to claim 1, characterized in that, It also includes an electrostatic discharge protection module; The first end of the electrostatic discharge protection module is connected to the second power source, and the second end of the electrostatic discharge protection module is connected to the switch status detection module.

5. The power on / off control system according to claim 1, characterized in that, The first enabling module includes a first transistor and a second transistor; The control electrode of the first transistor is connected to the switch state detection module, the first electrode of the first transistor is grounded, and the second electrode of the first transistor is connected to the control electrode of the second transistor. The first terminal of the second transistor is connected to the second power supply, the second terminal of the second transistor is connected to the first power supply, and the second terminal of the second transistor is also connected to the control terminal of the power output module.

6. The power on / off control system according to claim 1, characterized in that, The second enabling module includes a third transistor; The control electrode of the third transistor is connected to the control module, the first electrode of the third transistor is grounded, and the second electrode of the third transistor is connected to the control terminal of the power output module.

7. The power on / off control system according to claim 1, characterized in that, The power output module includes a fourth transistor; The control electrode of the fourth transistor is connected to the first enabling module, and the control electrode of the fourth transistor is also connected to the second enabling module. The first electrode of the fourth transistor is connected to the first power supply, and the second electrode of the fourth transistor is connected to the device to be powered.

8. The power on / off control system according to claim 1, characterized in that, It also includes energy storage modules; The control terminal of the power output module is connected to the first power source through the energy storage module.

9. The power on / off control system according to claim 1, characterized in that, It also includes a first filtering module; The second end of the power output module is connected to the first filter module.

10. A vehicle-mounted product, characterized in that, Includes the power on / off control system as described in any one of claims 1-9.

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