Screen wake-up circuit, vehicle control system and vehicle

Abstract

The invention provides a screen wake-up circuit, a vehicle control system and a vehicle, the screen wake-up circuit comprises a power supply control circuit, the input end of the power supply control circuit is used for receiving a power supply control signal output by a vehicle controller, and the power supply control circuit is used for outputting a wake-up signal based on the power supply control signal; the input end of the wake-up circuit is coupled with the output end of the power supply control circuit, and the output end of the wake-up circuit is used for being coupled with a vehicle-mounted screen; the first end of the coaxial cable is coupled with the output end of the vehicle controller and the output end of the power supply control circuit, and the second end of the coaxial cable is coupled with the input end of the screen controller and the input end of the wake-up circuit; thus, after the vehicle controller is powered on, the power supply control circuit outputs the wake-up signal, and the coaxial cable transmits the wake-up signal to the wake-up circuit so as to wake up the vehicle-mounted screen through the wake-up circuit, thereby solving the problem that the power supply management of the vehicle-mounted screen and the vehicle controller is inconsistent, and improving the stability of the vehicle entertainment system.

Description

Technical Field

[0001] The present disclosure relates to the field of vehicle technologies, and in particular, to a screen wake-up circuit, a vehicle control system, and a vehicle. Background Art

[0002] With the popularization of in-vehicle screens in vehicles, the reliability of in-vehicle screens has received more attention from consumers. Generally, before using an in-vehicle screen, it is necessary to wake up the in-vehicle screen first.

[0003] Currently, there are mainly two methods to wake up an in-vehicle screen: One is that after the CAN controller receives the ignition signal (Ignition Switch, IGN) sent by the vehicle, the CAN controller wakes up the screen controller, and the screen controller wakes up the in-vehicle screen. The other is to wake up the screen controller through a dedicated hard wire, thereby waking up the in-vehicle screen.

[0004] However, when waking up the in-vehicle screen through IGN or a dedicated hard wire, there is a problem of inconsistent power management, which leads to abnormal transmission when the vehicle controller transmits a video signal to the in-vehicle screen, affecting the normal use of the vehicle entertainment system. Summary of the Invention

[0005] To solve the above technical problems, the present application provides a screen wake-up circuit, a vehicle control system, and a vehicle, which can wake up the in-vehicle screen after the vehicle controller is powered on. In this way, there is no need to wake up the in-vehicle screen through IGN or a dedicated hard wire, solving the problem of inconsistent power management between the in-vehicle screen and the vehicle controller, and improving the stability of the vehicle entertainment system.

[0006] The technical solution of the present application is as follows:

[0007] In a first aspect, the present application provides a screen wake-up circuit, including:

[0008] A power control circuit, the input end of the power control circuit is used to receive the power control signal output by the vehicle controller, and the power control circuit is used to output a wake-up signal based on the power control signal;

[0009] A wake-up circuit, the input end of the wake-up circuit is coupled to the output end of the power control circuit, and the output end of the wake-up circuit is used to be coupled to the in-vehicle screen; the wake-up circuit is used to process the wake-up signal to wake up the in-vehicle screen;

[0010] A coaxial cable, the first end of the coaxial cable is respectively coupled to the vehicle controller and the output end of the power control circuit, and the second end of the coaxial cable is respectively coupled to the screen controller and the input end of the wake-up circuit. The coaxial cable is used to transmit the video signal output by the vehicle controller to the screen controller, and is also used to transmit the wake-up signal output by the power control circuit to the wake-up circuit.

[0011] In some embodiments, the power control circuit includes: a first transistor, a first resistor, and a second resistor; an input end of the power control circuit is coupled to a first end of the first resistor, a second end of the first resistor is coupled to a control end of the first transistor, a first end of the first transistor is coupled to a first power supply, a second end of the first transistor is coupled to a first end of the second resistor; an output end of the power control circuit is a second end of the second resistor.

[0012] In some embodiments, the power control circuit further includes a second transistor, an input end of the power control circuit is a control end of the second transistor, a first end of the second transistor is grounded, and a second end of the second transistor is coupled to a first end of the first resistor.

[0013] In some embodiments, the wake-up circuit includes a third resistor and a fourth resistor; an input end of the wake-up circuit is a first end of the third resistor, an output end of the wake-up circuit is a second end of the third resistor; a first end of the fourth resistor is coupled to the first end of the third resistor, and a second end of the fourth resistor is grounded.

[0014] In some embodiments, the screen wake-up circuit further includes:

[0015] a diagnostic circuit, an input end of the diagnostic circuit is coupled to an output end of the power control circuit, and an output end of the diagnostic circuit is used to be coupled to a vehicle controller; the diagnostic circuit is used to output a diagnostic signal;

[0016] The vehicle controller is further used to receive the diagnostic signal output from the output end of the diagnostic circuit, and determine the state of the in-vehicle screen based on the diagnostic signal; when the diagnostic signal is less than a first preset voltage, determine that the state of the in-vehicle screen is a normal state and output a video signal, or, when the diagnostic signal is greater than a second preset voltage, determine that the state of the in-vehicle screen is an abnormal state and stop outputting the video signal.

[0017] In some embodiments, the diagnostic circuit includes a fifth resistor, a sixth resistor, a seventh resistor, and a third capacitor; an input end of the diagnostic circuit is a first end of the fifth resistor, a second end of the fifth resistor and a first end of the sixth resistor are both coupled to a first end of the seventh resistor; a second end of the sixth resistor is grounded; an output end of the diagnostic circuit is a second end of the seventh resistor; a first end of the third capacitor is coupled to the second end of the seventh resistor, and a second end of the third capacitor is grounded.

[0018] In some embodiments, a first capacitor and a second capacitor are further included;

[0019] A first end of the first capacitor is coupled to the vehicle controller, and a second end of the first capacitor is coupled to a first end of a coaxial cable; a first end of the second capacitor is coupled to a second end of the coaxial cable, and a second end of the second capacitor is coupled to a screen controller.

[0020] In a second aspect, the present application provides a vehicle control system, including a vehicle controller, a screen controller, and a screen wake-up circuit as described in any embodiment of the first aspect;

[0021] The vehicle controller and the screen controller are coupled through the screen wake-up circuit. The vehicle controller is configured to output a video signal and a power control signal;

[0022] The screen wake-up circuit is configured to output a wake-up signal based on the power control signal to wake up the in-vehicle screen based on the wake-up signal, and is further configured to transmit the video signal to the screen controller;

[0023] The screen controller is configured to control the in-vehicle screen to display the video signal.

[0024] In some embodiments, the screen wake-up circuit is further configured to output a diagnostic signal;

[0025] The vehicle controller is further configured to receive the diagnostic signal output by the screen wake-up circuit and determine the state of the in-vehicle screen based on the diagnostic signal; when the diagnostic signal is less than a first preset voltage, determine that the state of the in-vehicle screen is a normal state and output the video signal, or when the diagnostic signal is greater than a second preset voltage, determine that the state of the in-vehicle screen is an abnormal state and stop outputting the video signal.

[0026] In a third aspect, the present application provides a vehicle, including an in-vehicle screen and a vehicle control system as described in any embodiment of the second aspect; wherein, the in-vehicle screen is configured to display the video signal output by the vehicle control system when being woken up.

[0027] The descriptions of the second aspect to the third aspect in the present application can refer to the detailed description of the first aspect; and, for the beneficial effects of the descriptions of the second aspect to the third aspect, reference can be made to the analysis of the beneficial effects of the first aspect, which will not be elaborated here.

[0028] The embodiment of the present application provides a screen wake-up circuit, a vehicle control system and a vehicle. The screen wake-up circuit includes a power control circuit. The input end of the power control circuit is used to receive a power control signal output by a vehicle controller. The power control circuit is used to output a wake-up signal based on the power control signal. A wake-up circuit, the input end of the wake-up circuit is coupled to the output end of the power control circuit, and the output end of the wake-up circuit is used to be coupled to an in-vehicle screen. The wake-up circuit is used to process the wake-up signal to wake up the in-vehicle screen. A coaxial cable, the first end of the coaxial cable is respectively coupled to the vehicle controller and the output end of the power control circuit, and the second end of the coaxial cable is respectively coupled to the screen controller and the input end of the wake-up circuit. The coaxial cable is used to transmit a video signal output by the vehicle controller to the screen controller, and is also used to transmit the wake-up signal output by the power control circuit to the wake-up circuit. In this way, after the vehicle controller is powered on, the power control circuit outputs a wake-up signal, and the coaxial cable transmits the wake-up signal to the wake-up circuit to wake up the in-vehicle screen through the wake-up circuit. In this way, after the vehicle controller is powered on (the vehicle is powered on), the in-vehicle screen will be woken up, solving the problem of inconsistent power management between the in-vehicle screen and the vehicle controller, and improving the stability of the vehicle entertainment system. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings herein are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0031] Figure 1 It is a schematic structural diagram of a screen wake-up circuit provided by an embodiment of the present application;

[0032] Figure 2 It is a schematic structural diagram of another screen wake-up circuit provided by an embodiment of the present application;

[0033] Figure 3 It is a schematic structural diagram of another screen wake-up circuit provided by an embodiment of the present application;

[0034] Figure 4 It is a schematic structural diagram of another screen wake-up circuit provided by an embodiment of the present application;

[0035] Figure 5 It is a schematic structural diagram of another screen wake-up circuit provided by an embodiment of the present application;

[0036] Figure 6Schematic diagram of another screen wake-up circuit provided by an embodiment of the present application;

[0037] Figure 7 Schematic diagram of another screen wake-up circuit provided by an embodiment of the present application;

[0038] Figure 8 Schematic diagram of a vehicle control system provided by an embodiment of the present application;

[0039] Figure 9 Schematic diagram of a vehicle provided by an embodiment of the present application. Detailed implementation manners

[0040] To make the purpose and implementation manners of the present application clearer, the following will clearly and completely describe the exemplary implementation manners of the present application with reference to the accompanying drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only a part of the embodiments of the present application, rather than all of the embodiments.

[0041] It should be noted that the brief description of the terms in the present application is only for facilitating the understanding of the subsequent described implementation manners, rather than intending to limit the implementation manners of the present application. Unless otherwise specified, these terms should be understood in their ordinary and general meanings.

[0042] The terms "first", "second", "third", etc. in the description, claims and the above-mentioned drawings of the present application are used to distinguish similar or homogeneous objects or entities, and do not necessarily mean to limit a specific order or sequence, unless otherwise noted. It should be understood that such terms can be interchanged under appropriate circumstances.

[0043] The terms "comprising" and "having" in the present application and any variations thereof are intended to cover but not exclusively include. For example, a product or device comprising a series of components does not necessarily have to be limited to all the components clearly listed, but may include other components not clearly listed or inherent to these products or devices.

[0044] The term "and / or" in the present application is only a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in the present application generally represents an "or" relationship between the associated objects before and after.

[0045] With the popularization of in-vehicle screens in vehicles, the reliability of in-vehicle screens has received more attention from consumers. Currently, a dedicated hard wire can be separately output from the in-vehicle computer to control the in-vehicle screen to wake it up; the in-vehicle screen can also be woken up according to the IGN signal sent by the in-vehicle computer. However, this will lead to inconsistent power management and affect the in-vehicle screen's reception of the video signal output by the vehicle controller at the in-vehicle computer end. For example, the in-vehicle computer outputs a video signal through the vehicle controller, but the screen controller at the in-vehicle computer end does not receive the IGN signal, resulting in the in-vehicle screen being in the off state, thus causing the video signal transmission to fail. When the in-vehicle computer outputs a wake-up signal to the in-vehicle screen through a dedicated hard wire, there is a time delay, so when the video signal output by the vehicle controller is transmitted to the in-vehicle screen, the in-vehicle screen is in the off state, resulting in the video signal transmission failure. In addition, waking up the in-vehicle screen through a dedicated hard wire will not only increase the hardware cost but also increase the cost of the vehicle's wiring harness.

[0046] In view of the above problems, an embodiment of the present application provides a screen wake-up circuit. The screen wake-up circuit includes a power control circuit. The input end of the power control circuit is used to receive the power control signal output by the vehicle controller. The power control circuit is used to output a wake-up signal based on the power control signal; a wake-up circuit, the input end of the wake-up circuit is coupled to the output end of the power control circuit, and the output end of the wake-up circuit is used to be coupled to the in-vehicle screen; the wake-up circuit is used to wake up the in-vehicle screen based on the wake-up signal; a coaxial cable, the first end of the coaxial cable is respectively coupled to the vehicle controller and the output end of the power control circuit, and the second end of the coaxial cable is respectively coupled to the screen controller and the input end of the wake-up circuit. The coaxial cable is used to transmit the video signal output by the vehicle controller to the screen controller and is also used to transmit the wake-up signal output by the power control circuit to the wake-up circuit; thus, after the vehicle controller is powered on, the power control circuit outputs a wake-up signal, and the coaxial cable transmits the wake-up signal to the wake-up circuit to wake up the in-vehicle screen through the wake-up circuit; in this way, after the vehicle controller is powered on (the vehicle is powered on), the in-vehicle screen will be woken up, solving the problem of inconsistent power management between the in-vehicle screen and the vehicle controller and improving the stability of the vehicle entertainment system.

[0047] The screen wake-up circuit provided by the embodiment of the present application will be described below. As is known to those of ordinary skill in the art, with the development of technology and the emergence of new scenarios, the technical solution provided by the embodiment of the present application is equally applicable to similar technical problems.

[0048] Refer to Figure 1 An embodiment of the present application provides a screen wake-up circuit, including a power control circuit 12 for receiving the power control signal output by the vehicle controller 11, a wake-up circuit 13, and a coaxial cable 14.

[0049] Among them, the input end of the power control circuit 12 is used to be coupled to the output end of the vehicle controller 11 to receive the power control signal output by the vehicle controller 11. The power control circuit 12 is used to output a wake-up signal based on the power control signal.

[0050] In some embodiments, taking the screen wake-up circuit applied in a vehicle as an example, when the vehicle is powered on, the vehicle controller 11 outputs a power control signal, and the power control circuit 12 outputs a wake-up signal for waking up the in-vehicle screen based on this power control signal. The application scenarios of the screen wake-up circuit in the embodiments of the present application are not limited. The following embodiments will take the screen wake-up circuit applied in a vehicle as an example for illustrative description.

[0051] As Figure 1 shown, the input end of the wake-up circuit 13 is coupled to the output end of the power control circuit 12, and the output end of the wake-up circuit 13 is used to be coupled to the in-vehicle screen 16 through the screen controller 15. The wake-up circuit 13 is used to process the wake-up signal to wake up the in-vehicle screen 16.

[0052] Exemplarily, when the power control circuit 12 outputs a wake-up signal, the wake-up circuit 13 performs filtering and current-limiting processing on this wake-up signal, and the screen controller 15 wakes up the in-vehicle screen 16 in response to the processed wake-up signal.

[0053] The first end of the coaxial cable 14 is respectively used to be coupled to the vehicle controller 11 and the output end of the power control circuit 12, and the second end of the coaxial cable 14 is respectively coupled to the wake-up circuit 13 and the screen controller 15. The coaxial cable 14 transmits the video signal output by the vehicle controller 11 to the screen controller 15, and is also used to transmit the wake-up signal output by the power control circuit 12 to the wake-up circuit 13.

[0054] Exemplarily, after the in-vehicle screen 16 is woken up, the vehicle controller 11 will output a video signal to the coaxial cable 14, and the coaxial cable 14 transmits the video signal to the screen controller 15. After receiving the video signal, the screen controller 15 will control the in-vehicle screen 16 to display the video signal.

[0055] In some embodiments, the coaxial cable 14 is a coaxial transmission cable, also known as a video transmission line.

[0056] In some embodiments, the vehicle controller 11 can be a main control unit (Central Processing Unit, CPU), or a microcontroller unit (Microcontroller Unit, MCU). The screen controller 15 can be an MCU. The embodiments of the present application are not limited thereto. In the following embodiments, the vehicle controller 11 will be taken as a CPU and the screen controller 15 as an MCU for illustration.

[0057] The screen wake-up circuit provided by this application, after the vehicle is powered on, outputs a power control signal through the vehicle controller 11. The power control circuit 12 outputs a wake-up signal according to this power control signal. After the wake-up circuit 13 receives the wake-up signal through the coaxial cable 14, it processes the wake-up signal so that the screen controller 15 wakes up the in-vehicle screen 16 based on the processed wake-up signal. Since both the wake-up signal and the video signal are transmitted through the coaxial cable 14, it is possible to ensure the consistency of the transmission of the wake-up signal and the video signal. In this way, it is possible to ensure the consistency of the power management of the in-vehicle screen 16 and the vehicle controller 11, thereby improving the stability of the vehicle entertainment system.

[0058] In some embodiments, this application provides a screen wake-up circuit. As Figure 2 shown, the power control circuit 12 in the screen wake-up circuit includes: a first transistor Q1, a first resistor R1, and a second resistor R2.

[0059] Among them, the input end of the power control circuit 12 is coupled to the first end a1 of the first resistor R1. The second end b1 of the first resistor R1 is coupled to the control end d1 of the first transistor Q1. The first end a2 of the first transistor Q1 is coupled to the first power supply. The second end b2 of the first transistor Q1 is coupled to the first end a3 of the second resistor R2. The output end of the power control circuit 12 is the second end b3 of the second resistor R2.

[0060] In some embodiments, taking the first power supply being integrated in the vehicle controller 11 as an example, when the vehicle is powered on, the first power supply integrated in the vehicle controller 11 outputs a stable voltage. The first end a2 of the first transistor Q1 will receive the stable voltage output by the first power supply and, when the first transistor Q1 is in the on state, output the stable voltage through the second end b2 of the first transistor Q1. This application embodiment does not limit whether the first power supply is a separate power supply or integrated in the vehicle controller 11. In the following embodiments, taking the first power supply being integrated in the vehicle controller 11 and outputting a stable voltage through the SV port (SVpower) port of the vehicle controller 11 as an example for exemplary illustration.

[0061] Exemplarily, when the vehicle is powered on, the COUT port (Control_Output port) of the vehicle controller 11 outputs a power control signal. The first end a1 of the first resistor R1 is used to receive the power control signal. When the first end a1 of the first resistor R1 receives the power control signal, the first resistor R1 performs current limiting processing on the power control signal. After that, the second end b1 of the first resistor R1 outputs the processed power control signal. After the control end d1 of the first transistor Q1 receives the processed power control signal, the first transistor Q1 determines whether to conduct according to the received processed power control signal.

[0062] When the first power supply (the SV port of the vehicle controller 11) outputs a preset stable voltage, the first end a2 of the first transistor Q1 is used to receive the stable voltage output by the first power supply. When the first end a2 of the first transistor Q1 receives the stable voltage output by the first power supply, and the processed power control signal satisfies the conduction condition of the first transistor Q1, so that the first end a2 and the second end b2 of the first transistor Q1 are conducted, the second end b2 of the first transistor Q1 will output a stable voltage.

[0063] The first end a3 of the second resistor R2 is used to receive the stable voltage. When the first end a3 of the second resistor R2 receives the stable voltage, the second resistor R2 will perform current limiting processing on the stable voltage. The second end b3 of the second resistor R2 outputs the processed stable voltage. Among them, the processed stable voltage includes a wake-up signal. After the coaxial cable 14 receives the wake-up signal, it transmits the wake-up signal to the wake-up circuit 13; after the wake-up circuit 13 processes the wake-up signal, based on the processed wake-up signal, it wakes up the in-vehicle screen 16 through the screen controller 15.

[0064] In some embodiments, the present application provides a screen wake-up circuit. Refer to Figure 3 , the power control circuit 12 in the screen wake-up circuit further includes: a second transistor Q2.

[0065] Among them, the input end of the power control circuit 12 is the control end d2 of the second transistor Q2. The first end a4 of the second transistor Q2 is grounded, and the second end b4 of the second transistor Q2 is coupled to the first end a1 of the first resistor R1.

[0066] Exemplarily, when the COUT port of the vehicle controller 11 outputs a power control signal, the control end d2 of the second transistor Q2 is used to receive the power control signal. When the control end d2 of the second transistor Q2 receives the power control signal, the second transistor Q2 determines whether to conduct according to the power control signal. When the power control signal satisfies the conduction condition of the second transistor Q2, the second transistor Q2 conducts, and the second end b4 of the second transistor Q2 outputs the power control signal, so that the first end a1 of the first resistor R1 receives the power control signal. After that, the power control circuit 12 outputs a wake-up signal to the coaxial cable 14 based on the power control signal, and the coaxial cable 14 transmits the wake-up signal to the wake-up circuit 13, so that after the wake-up circuit 13 processes the wake-up signal, based on the processed wake-up signal, it wakes up the in-vehicle screen 16 through the screen controller 15. The process is the same as that in the above embodiment and will not be described here again.

[0067] It can be understood that by connecting the control terminal d1 of the first transistor Q1 in series with the second terminal b4 of the second transistor Q2, a delay characteristic can be achieved between the first transistor Q1 and the second transistor Q2; thus, in the case where the power control signal suddenly changes, that is, the power control signal has a sharp pulse, the first transistor Q1 can be protected from the sharp pulse, thereby reducing the probability of damage to the first transistor Q1 and ensuring the stability of the first transistor Q1.

[0068] In some embodiments, the first transistor Q1 and the second transistor Q2 may be Metal-Oxide-Semiconductor Field-Effect Transistors (MOS transistors).

[0069] Exemplarily, the first transistor Q1 may be a P-channel MOS transistor. In this case, the control terminal d1 of the first transistor Q1 is the gate of the P-channel MOS transistor, the first terminal a2 of the first transistor Q1 is the source of the P-channel MOS transistor, and the second terminal b2 of the first transistor Q1 is the drain of the P-channel MOS transistor. The second transistor Q2 may be an N-channel MOS transistor, the control terminal d2 of the second transistor Q2 is the gate of the N-channel MOS transistor, the first terminal a4 of the second transistor Q2 is the drain of the N-channel MOS transistor, and the second terminal b4 of the second transistor Q2 is the source of the N-channel MOS transistor.

[0070] In some embodiments, the conduction condition of the first transistor Q1 is that the forward voltage between the control terminal d1 and the first terminal a2 of the first transistor Q1 is greater than the first threshold; the conduction condition of the second transistor Q2 may be that the forward voltage between the control terminal d2 and the second terminal b4 of the second transistor Q2 is greater than the second threshold. Among them, the first threshold and the second threshold may be the same. When the power control signal output by the vehicle controller 11 is a high level greater than the first threshold and greater than the second threshold, the first transistor Q1 and the second transistor Q2 will conduct. The embodiments of the present application do not limit the values of the first threshold and the second threshold. In the embodiments of the present application, the case where the power control signal output by the vehicle controller 11 is a high level greater than the first threshold and greater than the second threshold will be taken as an example for illustrative purposes.

[0071] In addition, the embodiments of the present application do not limit the voltage value of the stable voltage output by the first voltage source. In the following embodiments, the case where the voltage value of the stable voltage output by the first voltage source is 5V will be taken as an example for illustrative purposes.

[0072] Exemplarily, after the vehicle is powered on, the COUT port of the vehicle controller 11 will output a high level that can simultaneously satisfy the conduction conditions of the first transistor Q1 and the second transistor Q2, and the SV power port of the vehicle controller 11 will output a 5V voltage. When the gate of the N-channel MOS transistor (the control terminal d2 of the second transistor Q2) receives a high level, the N-channel MOS transistor (the second transistor Q2) will conduct, causing the source of the N-channel MOS transistor (the second terminal b4 of the second transistor Q2) to output a high level, so that the first terminal a1 of the first resistor R1 receives a high level. After the first resistor R1 limits the current of the high level, the second terminal b1 of the first resistor R1 outputs the processed high level.

[0073] Wherein, after the gate of the P-channel MOS transistor (the control terminal d1 of the first transistor Q1) receives the processed high level, the P-channel MOS transistor (the first transistor Q1) will conduct. At this time, the drain of the P-channel MOS transistor (the second terminal b2 of the first transistor Q1) will output the 5V voltage received by the source of the P-channel MOS transistor (the first terminal a2 of the first transistor Q1).

[0074] In some embodiments, the present application provides a screen wake-up circuit. Referring to Figure 4 , the wake-up circuit 13 in the screen wake-up circuit includes: a third resistor R3 and a fourth resistor R4.

[0075] Wherein, the input terminal of the wake-up circuit 13 is the first terminal a5 of the third resistor R3, and the output terminal of the wake-up circuit 13 is the second terminal b5 of the third resistor R3; the first terminal a6 of the fourth resistor R4 is coupled to the first terminal a5 of the third resistor R3, and the second terminal b6 of the fourth resistor R4 is grounded.

[0076] Exemplarily, after the second terminal b3 of the second resistor R2 outputs a wake-up signal to the coaxial cable 14, the first terminal a5 of the third resistor R3 receives the wake-up signal through the coaxial cable 14. When the first terminal a5 of the third resistor R3 receives the wake-up signal, the first terminal a6 of the fourth resistor R4 will receive the residual ripple voltage (such as, high-frequency voltage signal) in the wake-up signal, and the second terminal b6 of the fourth resistor R4 will guide the residual ripple voltage in the wake-up signal to the ground to eliminate it, so as to implement filtering processing of the wake-up signal. Then, the third resistor R3 limits the current of the filtered wake-up signal to obtain a processed wake-up signal. The second terminal b5 of the third resistor R3 outputs the processed wake-up signal to the screen controller 15. After the WUS port (Wakeup_Signal port) of the screen controller 15 receives the processed wake-up signal, it wakes up the in-vehicle screen 16 in response to the processed wake-up signal.

[0077] In some embodiments, the present application provides a screen wake-up circuit. Referring to Figure 5, the screen wake-up circuit further includes: a first capacitor C1 and a second capacitor C2.

[0078] Wherein, a first end a7 of the first capacitor C1 is coupled to the vehicle controller 11, a second end b7 of the first capacitor C1 is coupled to a first end a13 of the coaxial cable 14, a first end a8 of the second capacitor C2 is coupled to a second end b13 of the coaxial cable 14, and a second end b8 of the second capacitor C2 is coupled to the screen controller 15.

[0079] In some embodiments, a second end b3 of the second resistor R2 is coupled to a second end b7 of the first capacitor C1, and the second end b7 of the first capacitor C1 is configured to receive a wake-up signal output from the second end b3 of the second resistor R2; a first end a5 of the third resistor R3 is coupled to a first end a8 of the second capacitor C2, and the first end a8 of the second capacitor C2 is configured to output a wake-up signal.

[0080] Exemplarily, after the second end b3 of the second resistor R2 outputs a wake-up signal, the second end b7 of the first capacitor C1 receives the wake-up signal; thereafter, the first end a8 of the second capacitor C2 outputs the wake-up signal to the first end a5 of the third resistor R3, so that the wake-up signal is transmitted to the wake-up circuit 13. After the wake-up circuit 13 processes the wake-up signal, the processed wake-up signal is output to the screen controller 15, so that the screen controller 15 wakes up the in-vehicle screen 16 in response to the processed wake-up signal.

[0081] In some embodiments, a first end a7 of the first capacitor C1 is coupled to a video signal output end of the vehicle controller 11, and the first end a7 of the first capacitor C1 is configured to receive a video signal output from the vehicle controller 11. A second end b8 of the second capacitor C2 is coupled to a video signal input end of the screen controller 15, and the second end b8 of the second capacitor C2 is configured to output a video signal to the screen controller 15.

[0082] Exemplarily, after the in-vehicle screen 16 is awakened by the processed wake-up signal, the vehicle controller 11 outputs a video signal; the first terminal a7 of the first capacitor C1 receives the video signal. After the first capacitor C1 preliminarily processes the video signal (e.g., isolates the DC current), the second terminal b7 of the first capacitor C1 outputs the preliminarily processed video signal. The first terminal a13 of the coaxial cable 14 receives the preliminarily processed video signal output from the second terminal b7 of the first capacitor C1 and outputs the preliminarily processed video signal through the second terminal b13 of the coaxial cable 14. The first terminal a8 of the second capacitor C2 receives the preliminarily processed video signal output from the second terminal b13 of the coaxial cable 14 and performs further processing (e.g., further isolates the DC current); after the second capacitor C2 further processes the preliminarily processed video signal, the second terminal b8 of the second capacitor C2 outputs the further processed video signal to the screen controller 15. After the video signal input terminal of the screen controller 15 receives the further processed video signal, in response to the further processed video signal, it controls the in-vehicle screen 16 to display the further processed video signal.

[0083] In some embodiments, since the in-vehicle system gradually changes from an integrated solution (e.g., the in-vehicle computer and the in-vehicle screen 16 are integrally arranged) to a separated solution (the in-vehicle computer and the in-vehicle screen 16 are separated). In the separated solution, the in-vehicle computer and the in-vehicle screen 16 are connected by a coaxial transmission cable to transmit signals such as video through the coaxial transmission cable. Thus, the reliability, stability of the coaxial transmission cable and the related diagnostic hot plug design are particularly important.

[0084] Usually, the state of the in-vehicle screen 16 is detected by the CPU polling to read the registers in the serializer chip, that is, the hot plug of the in-vehicle screen 16 is detected. However, when the in-vehicle screen 16 is plugged into the wiring harness at the in-vehicle computer end (e.g., coaxial transmission cable, video transmission line), if the serializer chip fails or the wiring harness at the in-vehicle computer end fails (e.g., short circuit, open circuit), the vehicle controller will not be able to detect the in-vehicle screen 16 and stop outputting the wake-up signal or video signal. Thus, the failure rate is relatively high, which will affect the use of the in-vehicle screen 16 and reduce the stability of the vehicle entertainment system. At this time, it not only affects the normal use of the in-vehicle screen 16, but also is not convenient to determine the fault point, that is, the vehicle controller cannot determine whether the abnormal state of the in-vehicle screen 16 is caused by the failure of the serial chip or the failure of the wiring harness at the in-vehicle computer end; thus, the maintenance efficiency will be reduced.

[0085] Therefore, in order to further solve the above technical problems, in some embodiments, referring to Figure 6 , the embodiment of the present application provides a screen wake-up circuit, further including: a diagnostic circuit 17.

[0086] Among them, the output end of the diagnostic circuit 17 is used to be coupled to the vehicle controller 11, and the input end of the diagnostic circuit 17 is coupled to the output end of the power control circuit 12. The diagnostic circuit 17 is used to process the received initial diagnostic signal to output a diagnostic signal; the vehicle controller 11 is used to receive the diagnostic signal output from the output end of the diagnostic circuit 17 and determine the state of the in-vehicle screen 16 based on the diagnostic signal.

[0087] In some embodiments, since the wake-up circuit 13 is respectively connected in parallel with the power control circuit 12 and the diagnostic circuit 17 through a coaxial cable 14; therefore, when the power control circuit 12 outputs a processed stable voltage based on a power control signal, a part of the voltage is transmitted to the wake-up circuit 13 as a wake-up signal through the coaxial cable 14; and another part of the voltage is transmitted to the diagnostic circuit 17 as a diagnostic signal to be processed.

[0088] Exemplarily, for the processed stable voltage output by the power control circuit 12, a part of the processed stable voltage is output to the wake-up circuit 13 as a wake-up signal through the coaxial cable 14; another part of the processed stable voltage is output to the diagnostic circuit 17 as a diagnostic signal to be processed, so that the diagnostic circuit 17 processes the diagnostic signal to be processed, obtains a diagnostic signal and outputs it. The vehicle controller 11 receives the diagnostic signal output from the output end of the diagnostic circuit 17 and determines the state of the in-vehicle screen 16 based on the diagnostic signal.

[0089] In some embodiments, the present application provides a screen wake-up circuit. Refer to Figure 7 , the diagnostic circuit 17 in the screen wake-up circuit includes: a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, and a third capacitor C3.

[0090] Among them, the input end of the diagnostic circuit 17 is the first end a9 of the fifth resistor R5, the second end b9 of the fifth resistor R5 is coupled to the first end a11 of the seventh resistor R7; the first end a10 of the sixth resistor R6 is coupled to the first end a11 of the seventh resistor R7, and the second end b10 of the sixth resistor R6 is grounded; the output end of the diagnostic circuit 17 is the second end b11 of the seventh resistor R7; the first end a12 of the third capacitor C3 is coupled to the second end b11 of the seventh resistor R7, and the second end b12 of the third capacitor C3 is grounded.

[0091] Exemplarily, the first end a13 in the coaxial cable 14 receives a wake-up signal and outputs the wake-up signal to the wake-up circuit 13 through the second end b13 of the coaxial cable 14; the second end b3 of the second resistor R2 outputs a diagnostic signal to be processed. When the first end a9 of the fifth resistor R5 receives the diagnostic signal to be processed, the fifth resistor R5 and the seventh resistor R7 perform current limiting processing on the diagnostic signal to be processed, and the sixth resistor R6 and the third capacitor C3 form a resistor-capacitor filter (RC filter) to perform filtering processing on the diagnostic signal to be processed, so as to obtain a diagnostic signal. The second end b11 of the seventh resistor R7 outputs the diagnostic signal, and the DIAGN port (diagnose_ad_Vlotage port) of the vehicle controller 11 receives the diagnostic signal, so that the vehicle controller 11 determines the state of the in-vehicle screen 16 based on the diagnostic signal.

[0092] In some embodiments, the vehicle controller 11 is configured to determine that the state of the in-vehicle screen 16 is a normal state when the diagnostic signal is less than a first preset voltage; or, determine that the state of the in-vehicle screen 16 is an abnormal state when the diagnostic signal is greater than a second preset voltage.

[0093] In some embodiments, the first preset voltage may be equal to the second preset voltage, and the first preset voltage may also be greater than the second preset voltage. The embodiments of the present application do not limit this. In the following embodiments, an example in which the first preset voltage is greater than the second preset voltage will be used for exemplary illustration.

[0094] Exemplarily, in the case where the in-vehicle screen 16 is in an abnormal state (the in-vehicle screen 16 is disconnected from the screen controller 15); since the wake-up circuit 13 will be disconnected from the coaxial cable 14, that is, only the diagnostic circuit 17 is conducted with the power control circuit 12; therefore, the first preset voltage is determined based on the voltage output by the power control circuit 12 (the processed stable voltage) after being divided by the resistors (such as the fifth resistor R5 and the sixth resistor R6) in the diagnostic circuit 17. In the case where the in-vehicle screen 16 is in a normal state (the in-vehicle screen 16 is coupled to the screen controller 15); since both the wake-up circuit 13 and the diagnostic circuit 17 are conducted with the power control circuit 12; therefore, the second preset voltage is determined based on the voltage output by the power control circuit 12 (the processed stable voltage) after being divided by the resistors (such as the fourth resistor R4) in the wake-up circuit 13 and the resistors (such as the fifth resistor R5 and the sixth resistor R6) in the diagnostic circuit 17.

[0095] Among them, since the wake-up circuit 13 is respectively connected in parallel with the power control circuit 12 and the diagnostic circuit 17, and the power control circuit 12 and the diagnostic circuit 17 are connected in series, that is, the fourth resistor R4 is respectively connected in parallel with the second resistor R2, the fifth resistor R5 and the sixth resistor R6, and the second resistor R2, the fifth resistor R5 and the sixth resistor R6 are connected in series. Therefore, when the in-vehicle screen 16 is in an abnormal state, the total resistance in the screen wake-up circuit is greater than the total resistance in the screen wake-up circuit when the in-vehicle screen 16 is in a normal state; that is, the first preset voltage is greater than the second preset voltage.

[0096] In some embodiments, the vehicle controller 11 is configured to output a video signal when the in-vehicle screen 16 is in a normal state; the vehicle controller 11 is further configured to stop outputting the video signal when the in-vehicle screen 16 is in an abnormal state.

[0097] Exemplarily, in the case where the voltage value of the first preset voltage is V1 and the voltage value of the second preset voltage is V2. When the DIAGN port of the vehicle controller 11 receives a diagnostic signal, the vehicle controller 11 determines the state of the in-vehicle screen 16 based on the diagnostic signal, V1 (the first preset voltage) and V2 (the second preset voltage). Among them, when the voltage value of the diagnostic signal is greater than V2, the vehicle controller 11 determines that the in-vehicle screen 16 is disconnected from the screen controller 15 (for example, the in-vehicle screen 16 is not plugged into the wire harness connector), that is, the in-vehicle screen 16 is in an abnormal state; the vehicle controller 11 stops outputting the video signal. When the voltage value of the diagnostic signal is less than V1, the vehicle controller 11 determines that the in-vehicle screen 16 is connected to the screen controller 15 (the in-vehicle screen 16 is plugged into the wire harness connector), that is, the in-vehicle screen 16 is in a normal state; the vehicle controller 11 outputs a video signal so that the video signal is output to the screen controller 15 through the coaxial cable 14, and the screen controller 15 controls the in-vehicle screen 16 to display the video signal.

[0098] It can be understood that when the vehicle controller 11 and the diagnostic circuit 17 detect the state of the in-vehicle screen 16, since the diagnostic signal output by the diagnostic circuit 17 is determined based on the conduction conditions of the power control circuit 12 and the wake-up circuit 13. Therefore, when the vehicle controller 11 determines that the in-vehicle screen 16 is in an abnormal state according to the diagnostic signal and the in-vehicle screen 16 is plugged into the wire harness connector, it means that there is a fault in the screen wake-up circuit (the wire harness at the vehicle head unit). In this way, the failure rate can be reduced, the stability of the vehicle entertainment system can be improved; and it is more convenient to determine the cause of the fault when the in-vehicle screen 16 is in an abnormal state, and the maintenance efficiency can be improved.

[0099] As Figure 8 shown, in some embodiments, based on the screen wake-up circuit provided in the above embodiment, a vehicle control system is further provided, including a vehicle controller, a screen controller and the screen wake-up circuit according to any one of the above embodiments;

[0100] The vehicle controller and the screen controller are coupled through a screen wake-up circuit. The vehicle controller is used to output a video signal and a power control signal;

[0101] The screen wake-up circuit is used to output a wake-up signal based on the power control signal to wake up the in-vehicle screen based on the wake-up signal, and is also used to transmit the video signal to the screen controller;

[0102] The screen controller is used to control the in-vehicle screen to display the video signal.

[0103] In some embodiments, the screen wake-up circuit is further used to output a diagnostic signal;

[0104] The vehicle controller is further used to receive the diagnostic signal output by the screen wake-up circuit and determine the state of the in-vehicle screen based on the diagnostic signal; when the diagnostic signal is less than the first preset voltage, it is determined that the state of the in-vehicle screen is normal and the video signal is output, or when the diagnostic signal is greater than the second preset voltage, it is determined that the state of the in-vehicle screen is abnormal and the output of the video signal is stopped.

[0105] For the specific limitations and achievable beneficial effects of the vehicle control system, reference can be made to the limitations on the screen wake-up circuit in the foregoing text, which will not be elaborated herein.

[0106] As Figure 9 shown, in some embodiments, a vehicle is further provided, including an in-vehicle screen and the vehicle control system according to any one of the foregoing embodiments; wherein, the in-vehicle screen is used to display the video signal output by the vehicle control system when it is awakened.

[0107] For the specific limitations and achievable beneficial effects of the vehicle, reference can be made to the limitations on the screen wake-up circuit in the foregoing text, which will not be elaborated herein.

[0108] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A screen wake-up circuit, characterized in that, Comprising: A power control circuit, the input end of the power control circuit is used to receive a power control signal output by a vehicle controller, and the power control circuit is used to output a wake-up signal based on the power control signal; A wake-up circuit, the output end of the wake-up circuit is used to be coupled to an in-vehicle screen; The wake-up circuit is used to process the wake-up signal to wake up the in-vehicle screen; A coaxial cable, the first end of the coaxial cable is respectively coupled to the vehicle controller and the output end of the power control circuit, the second end of the coaxial cable is respectively coupled to a screen controller and the input end of the wake-up circuit, and the coaxial cable is used to transmit a video signal output by the vehicle controller to the screen controller, and is also used to transmit the wake-up signal output by the power control circuit to the wake-up circuit.

2. The screen wake-up circuit according to claim 1, characterized in that, The power control circuit includes: a first transistor, a first resistor, and a second resistor; the input end of the power control circuit is coupled to the first end of the first resistor, the second end of the first resistor is coupled to the control end of the first transistor, the first end of the first transistor is coupled to a first power supply, the second end of the first transistor is coupled to the first end of the second resistor; the output end of the power control circuit is the second end of the second resistor.

3. The screen wake-up circuit according to claim 2, characterized in that, The power control circuit further includes a second transistor, the input end of the power control circuit is the control end of the second transistor, the first end of the second transistor is grounded, and the second end of the second transistor is coupled to the first end of the first resistor.

4. The screen wake-up circuit according to claim 1, characterized in that, The wake-up circuit includes a third resistor and a fourth resistor; the input end of the wake-up circuit is the first end of the third resistor, the output end of the wake-up circuit is the second end of the third resistor; the first end of the fourth resistor is coupled to the first end of the third resistor, and the second end of the fourth resistor is grounded.

5. The screen wake-up circuit according to any one of claims 1-4, characterized in that, The screen wake-up circuit further includes: A diagnostic circuit, the input end of the diagnostic circuit is coupled to the output end of the power control circuit, and the output end of the diagnostic circuit is used to be coupled to the vehicle controller; the diagnostic circuit is used to output a diagnostic signal; The vehicle controller is further used to receive the diagnostic signal output by the output end of the diagnostic circuit, and determine the state of the in-vehicle screen based on the diagnostic signal; when the diagnostic signal is less than a first preset voltage, determine that the state of the in-vehicle screen is a normal state and output the video signal, or, when the diagnostic signal is greater than a second preset voltage, determine that the state of the in-vehicle screen is an abnormal state and stop outputting the video signal.

6. The screen wake-up circuit according to claim 5, characterized in that, The diagnostic circuit includes a fifth resistor, a sixth resistor, a seventh resistor, and a third capacitor; the input end of the diagnostic circuit is the first end of the fifth resistor, the second end of the fifth resistor and the first end of the sixth resistor are both coupled to the first end of the seventh resistor; the second end of the sixth resistor is grounded; the output end of the diagnostic circuit is the second end of the seventh resistor; the first end of the third capacitor is coupled to the second end of the seventh resistor, and the second end of the third capacitor is grounded.

7. The screen wake-up circuit according to claim 1, characterized in that, It further includes a first capacitor and a second capacitor; The first end of the first capacitor is coupled to the vehicle controller, and the second end of the first capacitor is coupled to the first end of the coaxial cable; the first end of the second capacitor is coupled to the second end of the coaxial cable, and the second end of the second capacitor is coupled to the screen controller.

8. A vehicle control system, characterized in that, It includes a vehicle controller, a screen controller, and a screen wake-up circuit as described in any one of claims 1-7; The vehicle controller and the screen controller are coupled through the screen wake-up circuit, and the vehicle controller is used to output a video signal and a power control signal; The screen wake-up circuit is used to output a wake-up signal based on the power control signal to wake up the in-vehicle screen based on the wake-up signal, and is also used to transmit the video signal to the screen controller; The screen controller is used to control the in-vehicle screen to display the video signal.

9. The vehicle control system according to claim 8, characterized in that, The screen wake-up circuit is further used to output a diagnostic signal; The vehicle controller is further used to receive the diagnostic signal output by the screen wake-up circuit and determine the state of the in-vehicle screen based on the diagnostic signal; when the diagnostic signal is less than the first preset voltage, determine that the state of the in-vehicle screen is a normal state and output the video signal, or, when the diagnostic signal is greater than the second preset voltage, determine that the state of the in-vehicle screen is an abnormal state and stop outputting the video signal.

10. A vehicle, characterized in that, It includes an in-vehicle screen and a vehicle control system as described in claim 8 or 9; wherein, the in-vehicle screen is used to display the video signal output by the vehicle control system when it is woken up.

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