Screen wake-up circuit, vehicle control system, and vehicle

Abstract

The screen wake-up circuit comprises a power supply control circuit, an input end of the power supply control circuit being configured to receive a power supply control signal output by a vehicle controller, and the power supply control circuit being configured to output a wake-up signal based on the power supply control signal; a wake-up circuit, an input end of the wake-up circuit being coupled to an output end of the power supply control circuit, and an output end of the wake-up circuit being configured to be coupled to a vehicle screen; and a coaxial cable, a first end of the coaxial cable being coupled to the vehicle controller and the output end of the power supply control circuit respectively, and a second end of the coaxial cable being coupled to a screen controller and the input end of the wake-up circuit respectively; in this way, after the vehicle controller is powered on, the power supply control circuit outputs the wake-up signal, the coaxial cable transmits the wake-up signal to the wake-up circuit, and the vehicle screen is woken up through the wake-up circuit, thereby solving the problem of inconsistent power management of the vehicle screen and the vehicle controller and improving the stability of the vehicle entertainment system.

Description

TECHNICAL FIELD

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

[0002] With the popularity of vehicle-mounted screens in vehicles, the reliability of vehicle-mounted screens also attracts more attention from consumers. Generally, before using a vehicle-mounted screen, the vehicle-mounted screen needs to be woken up first.

[0003] Currently, there are mainly two methods to wake up a vehicle-mounted screen: one is that a CAN controller wakes up a screen controller after receiving an ignition signal (IGN) sent by a vehicle, and the screen controller wakes up the vehicle-mounted screen. The second is to wake up the screen controller through a dedicated hard line, thereby waking up the vehicle-mounted screen.

[0004] However, when waking up a vehicle-mounted screen through an IGN or a dedicated hard line, there is a problem of inconsistent power management, thereby causing transmission abnormalities when a vehicle controller transmits a video signal to a vehicle-mounted screen, and affecting the normal use of a vehicle entertainment system. SUMMARY

[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 a vehicle-mounted screen after a vehicle controller is powered on. In this way, the vehicle-mounted screen does not need to be woken up through an IGN or a dedicated hard line, thereby solving the problem of inconsistent power management of the vehicle-mounted screen and the vehicle controller, and improving the stability of the vehicle entertainment system.

[0006] The technical solutions of the present application are as follows:

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

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

[0009] a wake-up circuit, an input end of the wake-up circuit being coupled to an output end of the power control circuit, and an output end of the wake-up circuit being configured to be coupled to a vehicle-mounted screen; the wake-up circuit being configured to process the wake-up signal to wake up the vehicle-mounted screen;

[0010] a coaxial cable, a first end of the coaxial cable being coupled to the vehicle controller and the output end of the power control circuit respectively, and a second end of the coaxial cable being coupled to the screen controller and the input end of the wake-up circuit respectively; the coaxial cable being configured to transmit a video signal output by the vehicle controller to the screen controller, and being further configured 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; the input terminal of the power control circuit is coupled to a first end of the first resistor, the second end of the first resistor is coupled to a control terminal of the first transistor, the first end of the first transistor is coupled to a first power supply, and the second end of the first transistor is coupled to a first end of the second resistor; the output terminal of the power control circuit is the second end of the second resistor.

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

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

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

[0015] The diagnostic circuit has its input terminal coupled to the output terminal of the power control circuit, and its output terminal is used to couple to the vehicle controller; the diagnostic circuit is used to output diagnostic signals.

[0016] The vehicle controller is also used to receive diagnostic signals output from the output terminal of the diagnostic circuit and determine the status of the vehicle screen based on the diagnostic signals; if the diagnostic signal is less than a first preset voltage, the vehicle screen is determined to be in a normal state and a video signal is output; or if the diagnostic signal is greater than a second preset voltage, the vehicle screen is determined to be in an abnormal state and the video signal output is stopped.

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

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

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

[0020] In a second aspect, the present application provides a vehicle control system, comprising a vehicle controller, a screen controller and the screen wake-up circuit according to any one of the first aspect;

[0021] The vehicle controller and the screen controller are coupled through the screen wake-up circuit, and 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 a vehicle screen based on the wake-up signal, and to transmit the video signal to the screen controller;

[0023] The screen controller is configured to control the 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 a state of the vehicle screen based on the diagnostic signal; in a case where the diagnostic signal is less than a first preset voltage, determine that the state of the vehicle screen is a normal state, and output the video signal, or in a case where the diagnostic signal is greater than a second preset voltage, determine that the state of the vehicle screen is an abnormal state, and stop outputting the video signal.

[0026] In a third aspect, the present application provides a vehicle, comprising a vehicle screen and the vehicle control system according to any one of the second aspect; wherein the vehicle screen is configured to display a video signal output by the vehicle control system in a case where the vehicle screen is woken up.

[0027] The second aspect to the third aspect of the present application can refer to the detailed description of the first aspect; and the beneficial effects of the second aspect to the third aspect can refer to the beneficial effect analysis of the first aspect, which will not be repeated here.

[0028] The embodiment of the application provides a screen wake-up circuit, a vehicle control system and a vehicle, and the screen wake-up circuit comprises a power supply control circuit, an 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; a wake-up circuit, an input end of the wake-up circuit is coupled with an output end of the power supply control circuit, and an output end of the wake-up circuit is used for being coupled with a vehicle-mounted screen; the wake-up circuit is used for processing the wake-up signal to wake up the vehicle-mounted screen; a coaxial cable, a first end of the coaxial cable is coupled with the vehicle controller and the output end of the power supply control circuit respectively, a second end of the coaxial cable is coupled with a screen controller and an input end of the wake-up circuit respectively, and the coaxial cable is used for transmitting a video signal output by the vehicle controller to the screen controller and is also used for transmitting the wake-up signal output by the power supply control circuit to the wake-up circuit; in this way, after the vehicle controller is powered on, the power supply control circuit outputs the wake-up signal, the coaxial cable transmits the wake-up signal to the wake-up circuit, so that the vehicle-mounted screen is woken up through the wake-up circuit; in this way, after the vehicle controller is powered on (the vehicle is powered on), the vehicle-mounted screen will be woken up, the problem that power management of the vehicle-mounted screen and the vehicle controller is inconsistent is solved, and the stability of the vehicle entertainment system is improved. BRIEF DESCRIPTION OF DRAWINGS

[0029] The drawings incorporated into the specification and forming a part of the specification, show embodiments consistent with the application, and together with the specification serve to explain the principles of the application.

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below, and obviously, other drawings can also be obtained by those skilled in the art without creative labor.

[0031] Figure 1 A structural schematic diagram of a screen wake-up circuit provided by the embodiment of the application is shown in the figure.

[0032] Figure 2 A structural schematic diagram of another screen wake-up circuit provided by the embodiment of the application is shown in the figure.

[0033] Figure 3 A structural schematic diagram of another screen wake-up circuit provided by the embodiment of the application is shown in the figure.

[0034] Figure 4 A structural schematic diagram of another screen wake-up circuit provided by the embodiment of the application is shown in the figure.

[0035] Figure 5 A structural schematic diagram of another screen wake-up circuit provided by the embodiment of the application is shown in the figure.

[0036] Figure 6Another structural diagram of a screen wake-up circuit provided by an embodiment of the present application is shown in FIG. 2.

[0037] Figure 7 Another structural diagram of a screen wake-up circuit provided by an embodiment of the present application is shown in FIG. 2.

[0038] Figure 8 A structural diagram of a vehicle control system provided by an embodiment of the present application is shown in FIG. 3.

[0039] Figure 9 A structural diagram of a vehicle provided by an embodiment of the present application is shown in FIG. 4. DETAILED DESCRIPTION

[0040] For the purpose of making the purpose and embodiments of the present application more clear, the following will combine the drawings in the exemplary embodiments of the present application to clearly and completely describe the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application.

[0041] It should be noted that the brief description of the terms in the present application is only for the convenience of understanding the following described embodiments, and is not intended to limit the embodiments of the present application. Unless otherwise specified, these terms should be understood according to their ordinary and general meanings.

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

[0043] In the present application, the terms "include" and "have" and any variations thereof are intended to cover but not exclusive inclusion, for example, a product or device including a series of components does not necessarily limit to all the components clearly listed, but can include other components not clearly listed or inherent to these products or devices.

[0044] In the present application, the term "and / or" is only a description of the association relationship between the associated objects, which means that there can be three relationships, for example, A and / or B can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in the present application generally represents an "or" relationship between the front and rear associated objects.

[0045] With the popularity of vehicle screens in vehicles, the reliability of vehicle screens is also more concerned by consumers. At present, a special hard line can be output from the vehicle machine end alone to control the vehicle screen to wake up the vehicle screen; the IGN signal sent by the vehicle machine end can also be used to wake up the vehicle screen. However, this will cause inconsistent power management and affect the vehicle screen to receive the video signal output by the vehicle controller of the vehicle machine end. For example, the vehicle machine end outputs the video signal through the vehicle controller, but the screen controller of the vehicle machine end does not receive the IGN signal, so that the vehicle screen is in a closed state, thereby causing the video signal transmission to fail. When the vehicle machine end outputs the wake-up signal to the vehicle screen through the special hard line, there is a time delay, so that when the video signal output by the vehicle controller is transmitted to the vehicle screen, the vehicle screen is in a closed state, thereby causing the video signal transmission to fail. In addition, waking up the vehicle screen through the special hard line will not only increase the hardware cost, but also increase the cost of the wire harness of the whole vehicle.

[0046] To solve the above problems, the embodiment of the present application provides a screen wake-up circuit. The screen wake-up circuit includes a power control circuit, an 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, an input end of the wake-up circuit is coupled with an output end of the power control circuit, and an output end of the wake-up circuit is used to be coupled with a vehicle screen; the wake-up circuit is used to wake up the vehicle screen based on the wake-up signal; a coaxial cable, a first end of the coaxial cable is coupled with the vehicle controller and the output end of the power control circuit respectively, a second end of the coaxial cable is coupled with the screen controller and the input end of the wake-up circuit respectively, 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; in this way, after the vehicle controller is powered on, the power control circuit outputs the wake-up signal, and the coaxial cable transmits the wake-up signal to the wake-up circuit to wake up the vehicle screen through the wake-up circuit; in this way, after the vehicle controller is powered on (the vehicle is powered on), the vehicle screen will be woken up, thereby solving the problem of inconsistent power management of the 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 is described below. It is known to those skilled in the art that, with the development of technology and the emergence of new scenarios, the technical solutions provided by the embodiment of the present application are also applicable to similar technical problems.

[0048] Reference Figure 1 The embodiment of the present application provides a screen wake-up circuit, which includes a power control circuit 12 used to receive a power control signal output by a vehicle controller 11, a wake-up circuit 13 and a coaxial cable 14.

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

[0050] In some embodiments, the screen wake-up circuit is applied in a vehicle. 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 vehicle screen based on the power control signal. The embodiments of the present application are not limited to the application scenario of the screen wake-up circuit, and the following embodiments are exemplarily described with the screen wake-up circuit applied in a vehicle.

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

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

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

[0054] Exemplarily, after the vehicle screen 16 is woken up, the vehicle controller 11 outputs a video signal to the coaxial cable 14, and the coaxial cable 14 transmits the video signal to the screen controller 15. After the screen controller 15 receives the video signal, the screen controller 15 controls the 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 central processing unit (CPU) or a microcontroller unit (MCU). The screen controller 15 can be an MCU. The embodiments of the present application are not limited to this. In the following embodiments, the vehicle controller 11 is taken as an example of a CPU, and the screen controller 15 is taken as an example of an MCU.

[0057] The screen wake-up circuit provided in the 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 the power control signal, the wake-up circuit 13 processes the wake-up signal after receiving the wake-up signal through the coaxial cable 14, so that the screen controller 15 wakes up the vehicle screen 16 based on the processed wake-up signal. Since the wake-up signal and the video signal are transmitted through the coaxial cable 14, the consistency of the wake-up signal and the video signal transmission can be ensured, so that the consistency of the power management of the vehicle screen 16 and the vehicle controller 11 can be ensured, thereby improving the stability of the vehicle entertainment system.

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

[0059] The input end of the power control circuit 12 is coupled with the first end a1 of the first resistor R1, the second end b1 of the first resistor R1 is coupled with the control end d1 of the first transistor Q1, and the first end a2 of the first transistor Q1 is coupled with the first power supply; the second end b2 of the first transistor Q1 is coupled with the first end a3 of the second resistor R2; and 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 case that the first power supply is 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 in the case that the first transistor Q1 is in the on state, the stable voltage is output through the second end b2 of the first transistor Q1. The application 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 case that the first power supply is integrated in the vehicle controller 11 and outputs a stable voltage through the SV port (SVpower) port of the vehicle controller 11 as an example for illustrative description.

[0061] For example, when the vehicle is powered on, the COUT port (Control_Output port) of the vehicle controller 11 outputs a power control signal, and 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 processes the power control signal by current limiting; then, 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 be turned on 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 configured 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 turn-on condition of the first transistor Q1, so that the first end a2 of the first transistor Q1 and the second end b2 of the first transistor Q1 are turned on, the second end b2 of the first transistor Q1 will output the stable voltage.

[0063] The first end a3 of the second resistor R2 is configured 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. The processed stable voltage includes a wake-up signal, and the coaxial cable 14 receives the wake-up signal and transmits the wake-up signal to the wake-up circuit 13. After the wake-up circuit 13 processes the wake-up signal, the wake-up circuit 13 will wake up the vehicle screen 16 through the screen controller 15 based on the processed wake-up signal.

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

[0065] 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 with the first end a1 of the first resistor R1.

[0066] For example, when the COUT port of the vehicle controller 11 outputs a power control signal, the control end d2 of the second transistor Q2 is configured 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 be turned on according to the power control signal. When the power control signal satisfies the turn-on condition of the second transistor Q2, the second transistor Q2 is turned on, 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. Then, 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 the wake-up circuit 13 can process the wake-up signal, and then wake up the vehicle screen 16 through the screen controller 15 based on the processed wake-up signal. The process is the same as the above-mentioned embodiments, and will not be described here.

[0067] It can be understood that by connecting the control end d1 of the first transistor Q1 and the second end b4 of the second transistor Q2 in series, the first transistor Q1 and the second transistor Q2 have a delay characteristic. In this way, in the case of a sudden change of the power supply control signal, that is, the power supply control signal has a sharp pulse, the first transistor Q1 can be prevented from being affected by 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 can be metal-oxide-semiconductor field-effect transistors (MOS transistors).

[0069] For example, the first transistor Q1 can be a P-channel MOS transistor. At this time, the control end d1 of the first transistor Q1 is the gate of the P-channel MOS transistor, the first end a2 of the first transistor Q1 is the source of the P-channel MOS transistor, and the second end b2 of the first transistor Q1 is the drain of the P-channel MOS transistor. The second transistor Q2 can be an N-channel MOS transistor, the control end d2 of the second transistor Q2 is the gate of the N-channel MOS transistor, the first end a4 of the second transistor Q2 is the drain of the N-channel MOS transistor, and the second end 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 end d1 of the first transistor Q1 and the first end a2 of the first transistor Q1 is greater than a first threshold value; and the conduction condition of the second transistor Q2 can be that the forward voltage between the control end d2 of the second transistor Q2 and the second end b4 of the second transistor Q2 is greater than a second threshold value. The first threshold value and the second threshold value can be the same. When the power supply control signal output by the vehicle controller 11 is a high level greater than the first threshold value and greater than the second threshold value, the first transistor Q1 and the second transistor Q2 will be turned on. The numerical value of the first threshold value and the second threshold value is not limited in the present application. In the present application, the power supply control signal output by the vehicle controller 11 is taken as an example, which is a high level greater than the first threshold value and greater than the second threshold value.

[0071] In addition, the voltage value of the stable voltage output by the first voltage source is not limited in the present application. In the following embodiments, the voltage value of the stable voltage output by the first voltage source is taken as an example, which is 5V.

[0072] Exemplarily, after the vehicle is powered on, the COUT port of the vehicle controller 11 will output a high level which can simultaneously satisfy the turn-on 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 tube (the control end d2 of the second transistor Q2) receives the high level, the N-channel MOS tube (the second transistor Q2) will be turned on, so that the source of the N-channel MOS tube (the second end b4 of the second transistor Q2) outputs a high level, so that the first end a1 of the first resistor R1 receives the high level. After the first resistor R1 processes the high level, the second end b1 of the first resistor R1 outputs the processed high level.

[0073] The gate of the P-channel MOS tube (the control end d1 of the first transistor Q1) receives the processed high level, and the P-channel MOS tube (the first transistor Q1) will be turned on. At this time, the drain of the P-channel MOS tube (the second end b2 of the first transistor Q1) will output the 5V voltage received by the source of the P-channel MOS tube (the first end 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 comprises a third resistor R3 and a fourth resistor R4.

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

[0076] Exemplarily, after the second end b3 of the second resistor R2 outputs the wake-up signal to the coaxial cable 14, the first end a5 of the third resistor R3 receives the wake-up signal through the coaxial cable 14. When the first end a5 of the third resistor R3 receives the wake-up signal, the first end a6 of the fourth resistor R4 will receive the residual ripple voltage (such as a high-frequency voltage signal) in the wake-up signal, and the second end 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 realize the filtering processing of the wake-up signal. Then, the third resistor R3 processes the current of the filtered wake-up signal to obtain a processed wake-up signal. The second end b5 of the third resistor R3 outputs the processed wake-up signal to the screen controller 15, and the WUS port (Wakeup_Signal port) of the screen controller 15 receives the processed wake-up signal, and the vehicle-mounted screen 16 is woken up in response to the processed wake-up signal.

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

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

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

[0080] For example, after the second end b3 of the second resistor R2 outputs the wake-up signal, the second end b7 of the first capacitor C1 receives the wake-up signal; then, 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 signal is processed by the wake-up circuit 13, the processed wake-up signal is output to the screen controller 15, so that the screen controller 15 wakes up the vehicle screen 16 in response to the processed wake-up signal.

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

[0082] For example, after the vehicle screen 16 is woken up by the processed wake-up signal, the vehicle controller 11 outputs a video signal; the first end a7 of the first capacitor C1 receives the video signal. After the first capacitor C1 preliminarily processes the video signal (for example, isolates direct current), the second end b7 of the first capacitor C1 outputs the preliminarily processed video signal. The first end a13 of the coaxial cable 14 receives the preliminarily processed video signal output by the second end b7 of the first capacitor C1, and outputs the preliminarily processed video signal through the second end b13 of the coaxial cable 14. The first end a8 of the second capacitor C2 receives the preliminarily processed video signal output by the second end b13 of the coaxial cable 14, and processes the preliminarily processed video signal again (for example, further isolates direct current); after the second capacitor C2 processes the preliminarily processed video signal again, the second end b8 of the second capacitor C2 outputs the processed video signal to the screen controller 15. After the video signal input end of the screen controller 15 receives the processed video signal, the screen controller 15 controls the vehicle screen 16 to display the processed video signal in response to the processed video signal.

[0083] In some embodiments, the vehicle machine system gradually changes from an integrated solution (for example, the vehicle machine and the vehicle screen 16 are integrally arranged) to a separated solution (the vehicle machine and the vehicle screen 16 are separated). In the separated solution, the vehicle machine and the vehicle screen 16 are connected by a coaxial transmission cable to transmit signals such as video signals through the coaxial transmission cable. Therefore, the reliability and stability of the coaxial transmission cable and the related hot plug diagnosis design are particularly important.

[0084] Generally, the state of the vehicle screen 16 is detected by reading the registers in the serializer chip through CPU polling, that is, the hot plug of the vehicle screen 16 is detected. However, in the case of plugging the vehicle screen 16 and the wire harness (for example, the coaxial transmission cable, the video transmission line) of the vehicle machine end, if the serializer chip fails or the wire harness of the vehicle machine end fails (for example, short circuit, open circuit), the vehicle controller will not be able to detect the vehicle screen 16, and will stop outputting the wake-up signal or the video signal. Therefore, the failure rate is high, which will affect the use of the vehicle screen 16 and reduce the stability of the vehicle entertainment system. At this time, not only the normal use of the vehicle screen 16 is affected, but also it is inconvenient to determine the fault point, that is, the vehicle controller cannot judge whether the abnormal state of the vehicle screen 16 is caused by the failure of the serializer chip or the failure of the wire harness of the vehicle machine end; therefore, the maintenance efficiency will be reduced.

[0085] Therefore, in order to further solve the above technical problems, in some embodiments, with reference to Figure 6 The embodiment of the present application provides a screen wake-up circuit, which further comprises a diagnosis circuit 17.

[0086] The output end of the diagnosis circuit 17 is coupled with the vehicle controller 11, and the input end of the diagnosis circuit 17 is coupled with the output end of the power supply control circuit 12. The diagnosis circuit 17 is configured to process the received initial diagnosis signal to output a diagnosis signal; and the vehicle controller 11 is configured to receive the diagnosis signal output by the output end of the diagnosis circuit 17, and determine the state of the vehicle screen 16 based on the diagnosis signal.

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

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

[0089] In some embodiments, the present application provides a screen wake-up circuit, which is described with reference to Figure 7 The diagnosis 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] The input end of the diagnosis circuit 17 is the first end a9 of the fifth resistor R5, the second end b9 of the fifth resistor R5 is coupled with the first end a11 of the seventh resistor R7; the first end a10 of the sixth resistor R6 is coupled with 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 diagnosis circuit 17 is the second end b11 of the seventh resistor R7; the first end a12 of the third capacitor C3 is coupled with 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 of the coaxial cable 14 receives the 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 the to-be-processed diagnosis signal. When the first end a9 of the fifth resistor R5 receives the to-be-processed diagnosis signal, the fifth resistor R5 and the seventh resistor R7 perform current limiting processing on the to-be-processed diagnosis signal, and the sixth resistor R6 and the third capacitor C3 constitute a resistor-capacitor filter (RC filter) to filter the to-be-processed diagnosis signal, so as to obtain the diagnosis signal. The second end b11 of the seventh resistor R7 outputs the diagnosis signal, and the DIAGN port of the vehicle controller 11 receives the diagnosis signal, so as to enable the vehicle controller 11 to determine the state of the vehicle-mounted screen 16 based on the diagnosis signal.

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

[0093] In some embodiments, the first preset voltage can be equal to the second preset voltage, or the first preset voltage can be greater than the second preset voltage. The embodiments of the present application are not limited in this regard. In the following embodiments, the first preset voltage is greater than the second preset voltage.

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

[0095] In this circuit, the wake-up circuit 13 is connected in parallel with the power control circuit 12 and the diagnostic circuit 17, respectively, while the power control circuit 12 and the diagnostic circuit 17 are connected in series. This means the fourth resistor R4 is connected in parallel with the second resistor R2, the fifth resistor R5, and the sixth resistor R6, respectively, while the second resistor R2, the fifth resistor R5, and the sixth resistor R6 are connected in series. Therefore, the total resistance in the screen wake-up circuit when the vehicle screen 16 is in an abnormal state is greater than the total resistance in the screen wake-up circuit when the 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 also configured to stop outputting the video signal when the in-vehicle screen 16 is in an abnormal state.

[0097] For example, when 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 vehicle screen 16 based on the diagnostic signal, V1 (the first preset voltage), and V2 (the second preset voltage). Specifically, if the voltage value of the diagnostic signal is greater than V2, the vehicle controller 11 determines that the vehicle screen 16 is disconnected from the screen controller 15 (e.g., the vehicle screen 16 is not connected to the wiring harness connector), meaning the vehicle screen 16 is in an abnormal state; the vehicle controller 11 stops outputting video signals. If the voltage value of the diagnostic signal is less than V1, the vehicle controller 11 determines that the vehicle screen 16 is connected to the screen controller 15 (the vehicle screen 16 is connected to the wiring harness connector), meaning the 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 vehicle screen 16 to display the video signal.

[0098] It is understandable that when the vehicle controller 11 and diagnostic circuit 17 detect the status of the in-vehicle screen 16, the diagnostic signal output by the diagnostic circuit 17 is determined based on the conduction status of the power control circuit 12 and the wake-up circuit 13. Therefore, if the vehicle controller 11 determines that the in-vehicle screen 16 is in an abnormal state based on the diagnostic signal, and the in-vehicle screen 16 is connected to the wiring harness connector, it means that the screen wake-up circuit (the wiring harness at the vehicle end) is faulty. This reduces the failure rate, improves the stability of the vehicle entertainment system, and makes it easier to determine the cause of the fault when the in-vehicle screen 16 is in an abnormal state, thus improving maintenance efficiency.

[0099] like Figure 8 As shown, in some embodiments, based on the screen wake-up circuit provided in the above embodiments, a vehicle control system is also provided, including a vehicle controller, a screen controller, and a screen wake-up circuit as described in any of the above embodiments.

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

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

[0102] The screen controller is configured to control the vehicle screen to display the video signal.

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

[0104] The vehicle controller is further configured to receive the diagnostic signal output by the screen wake-up circuit and determine a state of the vehicle screen based on the diagnostic signal; in a case where the diagnostic signal is less than a first preset voltage, the vehicle controller determines that the state of the vehicle screen is a normal state and outputs the video signal, or in a case where the diagnostic signal is greater than a second preset voltage, the vehicle controller determines that the state of the vehicle screen is an abnormal state and stops outputting the video signal.

[0105] For specific limitations and achievable benefits of the vehicle control system, reference can be made to the limitations of the screen wake-up circuit described above, which will not be repeated here.

[0106] As shown in FIG. 1, Figure 9 In some embodiments, a vehicle is also provided, including a vehicle screen and a vehicle control system according to any of the embodiments described above; wherein the vehicle screen is configured to display the video signal output by the vehicle control system when the vehicle screen is woken up.

[0107] For specific limitations and achievable benefits of the vehicle, reference can be made to the limitations of the screen wake-up circuit described above, which will not be repeated here.

[0108] The above is merely specific embodiments of the present application, but the protection scope of the present application is not limited thereto, any changes or replacements within the technical scope disclosed in the present application should be covered within 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, include: A power control circuit, the input terminal of which is used to receive a 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; a wake-up circuit, the output terminal of which is used to be coupled to the vehicle screen; the wake-up circuit is used to process the wake-up signal to wake up the vehicle screen. A coaxial cable, wherein the first end of the coaxial cable is coupled to the output terminals of the vehicle controller and the power control circuit respectively, and the second end of the coaxial cable is coupled to the input terminals of the screen controller and the wake-up circuit respectively. The coaxial cable is used to transmit the video signal output by the vehicle controller to the screen controller, and also to transmit the wake-up signal output by the power control circuit to the wake-up circuit. The screen wake-up circuit also includes: A diagnostic circuit, wherein the input terminal of the diagnostic circuit is coupled to the output terminal of the power control circuit, and the output terminal of the diagnostic circuit is used to couple to the vehicle controller; the diagnostic circuit is used to output diagnostic signals. The vehicle controller is also configured to receive the diagnostic signal output from the output terminal of the diagnostic circuit, and determine the state of the vehicle screen based on the diagnostic signal; if the diagnostic signal is less than a first preset voltage, determine that the state of the vehicle screen is normal and output the video signal; or, if the diagnostic signal is greater than a second preset voltage, determine that the state of the vehicle screen is abnormal and stop outputting the video signal. The diagnostic circuit includes a fifth resistor, a sixth resistor, a seventh resistor, and a third capacitor; the input terminal of the diagnostic circuit is the first terminal of the fifth resistor, and the second terminal of the fifth resistor and the first terminal of the sixth resistor are both coupled to the first terminal of the seventh resistor; the second terminal of the sixth resistor is grounded; the output terminal of the diagnostic circuit is the second terminal of the seventh resistor; the first terminal of the third capacitor is coupled to the second terminal of the seventh resistor, and the second terminal of the third capacitor is grounded. When the power control circuit outputs a stable voltage after processing based on the power control signal, part of the voltage is transmitted to the wake-up circuit via a coaxial cable as a wake-up signal; another part of the voltage is transmitted to the diagnostic circuit as a diagnostic signal to be processed.

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 terminal of the power control circuit is coupled to a first end of the first resistor, the second end of the first resistor is coupled to a control terminal of the first transistor, the first end of the first transistor is coupled to a first power supply, and the second end of the first transistor is coupled to a first end of the second resistor; the output terminal 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 terminal of which is the control terminal of the second transistor, the first terminal of the second transistor is grounded, and the second terminal of the second transistor is coupled to the first terminal 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 terminal of the wake-up circuit is the first terminal of the third resistor, and the output terminal of the wake-up circuit is the second terminal of the third resistor; the first terminal of the fourth resistor is coupled to the first terminal of the third resistor, and the second terminal of the fourth resistor is grounded.

5. The screen wake-up circuit according to claim 1, characterized in that, It also includes a first capacitor and a second capacitor; 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 the 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 the screen controller.

6. A vehicle control system, characterized in that, Includes a vehicle controller, a screen controller, and a screen wake-up circuit as described in any one of claims 1-5; The vehicle controller and the screen controller are coupled through the screen wake-up circuit, and the vehicle controller is used to output video signals and power control signals. The screen wake-up circuit is used to output a wake-up signal based on the power control signal, so as to wake up the 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 display of the video signal on the vehicle screen.

7. The vehicle control system according to claim 6, characterized in that, The screen wake-up circuit is also used to output diagnostic signals; The vehicle controller is further configured to receive the diagnostic signal output by the screen wake-up circuit, and determine the state of the vehicle screen based on the diagnostic signal; if the diagnostic signal is less than a first preset voltage, determine that the state of the vehicle screen is normal and output the video signal; or, if the diagnostic signal is greater than a second preset voltage, determine that the state of the vehicle screen is abnormal and stop outputting the video signal.

8. A vehicle, characterized in that, It includes an in-vehicle screen and a vehicle control system as described in claim 6 or 7; wherein the in-vehicle screen is used to display video signals output by the vehicle control system when the system is activated.

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