A control system for a vehicle-mounted split display screen

Abstract

The application provides a control system of a vehicle-mounted separated display screen, and relates to the technical field of vehicle-mounted equipment, and comprises a control module arranged in an SOC of a host computer and a response module arranged in an SOC of a display screen; the control module is used for generating a video signal and sending the video signal to the display screen, and is also used for listening to a state of the display screen through port mapping, generating a corresponding control instruction when an abnormal state of the display screen occurs, and sending the control instruction to the display screen; the response module is used for receiving the video signal and performing display output, and is also used for monitoring the state of the display screen and changing the state of the display screen according to the control instruction sent by the host computer. The control function of the vehicle-mounted separated display screen is realized in the SOC of the host computer and the SOC of the display screen, and the hardware and manpower costs are reduced.

Description

Technical Field

[0001] This application relates to the field of vehicle-mounted equipment technology, and in particular to a control system for a vehicle-mounted split display screen. Background Technology

[0002] In-vehicle computers are specialized automotive information products developed specifically for the unique operating environment and electrical circuit characteristics of automobiles. They are resistant to high temperatures, dust, and shock, and can be integrated with automotive electronic circuits. They support in-vehicle internet access, audio-visual entertainment, satellite positioning, voice navigation, games, telephone calls, and other functions. With the increasing demands of drivers and passengers for in-vehicle entertainment systems, in-vehicle navigation systems, as the main entertainment terminal in automobiles, are playing an increasingly important role in automotive electronic equipment.

[0003] Split-type displays are characterized by flexible installation methods, good heat dissipation, flexible size design, and no added burden to the main unit's structural design. They offer significant advantages in controlling the viewing distance and angle between the display and the driver. Currently, more and more in-vehicle entertainment systems are adopting this type of split-type display.

[0004] Current in-vehicle entertainment systems typically use a host MCU (Microcontroller Unit) to independently control the display module. This approach is costly, and a separate communication protocol needs to be developed between the MCU and the SOC (System-on-a-Chip) to handle various data exchanges. It also requires collaboration between two development teams to debug and match the two modules. This results in significant manpower investment and high hardware costs. Furthermore, joint debugging can easily lead to uncontrollable problems and numerous troubleshooting points. Summary of the Invention

[0005] In view of this, this application provides a control system and method for a vehicle-mounted split display screen, which sets the control system of the split display screen on the host computer on the SOC, thereby solving the above-mentioned technical problems in the present invention.

[0006] This application provides a control system for a vehicle-mounted split display screen, including: a control module disposed in the host SOC and a response module disposed in the display screen SOC;

[0007] The control module is used to generate video signals and send them to the display screen, and also to monitor the status of the display screen through port mapping. When the display screen has an abnormal status, it generates corresponding control commands and sends them to the display screen.

[0008] The response module is used to receive video signals and output them for display, and also to monitor the status of the display screen and change the status of the display screen according to the control commands sent by the host.

[0009] Furthermore, the control module includes: a video signal generation unit, a status monitoring unit, a control signal generation unit, and a transmission unit;

[0010] The video signal generation unit is used to generate video signals;

[0011] The status monitoring unit is used to monitor the status of the display screen through the control I / O port of the serializer and send abnormal status information to the control signal generation unit.

[0012] The control signal generation unit is used to receive abnormal status information of the display screen and generate control commands for the display screen in IIC bus communication format.

[0013] The transmitting unit is used to transmit video signals and control commands to the deserializer of the display screen via a serializer and an LDVS harness.

[0014] Furthermore, the video signal is a DSI signal or an LVDS signal.

[0015] Furthermore, the response module includes: an initialization unit, a receiving unit, a display unit, a backlight management unit, a touch unit, and a status monitoring unit;

[0016] The initialization unit is used to initialize the deserializer, display chip, and touch chip;

[0017] The receiving unit is used to receive the video signal and control command after being parsed and processed by the deserializer, and send the video signal to the display unit and the control command to the backlight management unit.

[0018] The display unit is used to output video signals in the form of images;

[0019] The backlight management unit is used to turn on the screen backlight device, turn off the screen backlight device, or adjust the brightness of the backlight device according to the received control command.

[0020] The touch unit is used to capture touch data from the display screen, convert the touch data into data in the IIC bus communication format, and then send it to the input system; the input system includes at least a keyboard and a mouse;

[0021] The status monitoring unit is used to monitor the status of the display screen and output a status signal to the deserializer.

[0022] Furthermore, the initialization unit includes:

[0023] The deserializer initialization subunit is used to configure the deserializer's control I / O ports as the control I / O ports associated with the serializer;

[0024] The display initialization subunit is used to initialize the display chip based on the display screen initialization timing and write parameters, and then turn on the screen backlight device after initialization is complete.

[0025] The touch initialization subunit is used to initialize the touch chip based on the touch initialization timing.

[0026] Furthermore, the status monitoring unit includes:

[0027] The temperature monitoring subunit is used to monitor the temperature of the display screen and send the temperature status information to the control I / O port of the deserializer;

[0028] The screen status monitoring subunit is used to monitor the screen status and send the screen status to the control I / O port of the deserializer.

[0029] Furthermore, the temperature monitoring subunit includes: an output terminal of a thermistor, a first power supply terminal, a first resistor, a second resistor, a third resistor, a temperature comparator, a first capacitor, a second capacitor, a third capacitor, a fourth resistor, a monitoring output terminal, and a second power supply terminal; wherein,

[0030] The output terminal of the thermistor is connected to pin 1 of the temperature comparator through one end of the second resistor; the first power supply terminal is connected to pin 3 of the temperature comparator through one end of the first resistor and one end of the third resistor; the common terminal of the second resistor and the third resistor is grounded, and pin 2 of the temperature comparator is grounded.

[0031] Pin 5 of the temperature comparator is connected to the second power supply terminal through one end of the first capacitor, one end of the second capacitor, and one end of the fourth resistor. Pin 4 of the temperature comparator is connected to the monitoring output terminal through the common terminal of the third capacitor C89 and the fourth resistor. The common terminal of the first capacitor, the second capacitor, and the third capacitor is grounded.

[0032] The thermistor outputs the display temperature; the temperature comparator compares the display temperature with 45 degrees Celsius. If the display temperature is greater than 45 degrees Celsius, the monitoring output terminal outputs "1" to the corresponding feedback pin of the control IO port of the deserializer, where "1" indicates an abnormal temperature condition; otherwise, it outputs "0" to the corresponding feedback pin of the control IO port of the deserializer, where "0" indicates a normal temperature condition.

[0033] Furthermore, the screen status monitoring subunit is specifically used for:

[0034] When a screen error is detected, a "1" is sent to the corresponding feedback pin of the deserializer's control I / O port, indicating that the screen status is abnormal; otherwise, a "0" is sent to the corresponding feedback pin of the deserializer's control I / O port, indicating that the screen status is normal.

[0035] Furthermore, the control signal generation unit includes:

[0036] The temperature control subunit is used to issue a control command to "set the backlight brightness to 10% of the maximum brightness value" when three consecutive abnormal temperature values ​​of "1" are obtained.

[0037] The screen control subunit is used to issue a control command to "turn off the screen backlight device and initialize the display screen" when three consecutive abnormal screen status values ​​of "1" are obtained.

[0038] This application transfers control of the display screen from the MCU to the SOC, achieving greater software integration. At the same time, it makes full use of the mapping functions of the DSI deserializer and serializer to map various signals of the display screen to the host, enabling the SOC to completely take over the original MCU's work, thus reducing hardware and labor costs. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0040] Figure 1 A functional structure diagram of the control system for the vehicle-mounted split display screen provided in an embodiment of this application;

[0041] Figure 2 A structural functional diagram of the control module of the SOC installed in the host computer provided in the embodiments of this application;

[0042] Figure 3 A structural functional diagram of a response module of a SOC installed on a display screen, provided in an embodiment of this application;

[0043] Figure 4 A circuit diagram of a temperature monitoring subunit provided in an embodiment of this application. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0045] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0046] First, a brief introduction to the design concept of the embodiments of this application will be given.

[0047] Currently, the main design approach for in-vehicle entertainment system displays is to use an MCU to control the display module independently. This approach is costly, and a separate communication protocol needs to be developed between the MCU and the SOC to complete various data exchanges. It also requires collaboration and debugging between two development teams to achieve proper matching of the two modules. Furthermore, it requires a significant investment of development manpower and has high hardware costs. Joint debugging can easily lead to uncontrollable problems and numerous troubleshooting points.

[0048] To address the aforementioned technical problems, this application provides a control system for a vehicle-mounted split display screen. In this system, the control module of the host unit is located within the System-on-Chip (SoC), and the response module of the display screen is also located within the SoC. This transfers control of the display screen from the MCU to the SoC, achieving greater software integration. Simultaneously, it fully utilizes the mapping functions of the DSI deserializer and serializer to map various signals from the display screen to the host unit, enabling the SoC to completely take over the original MCU's operations. This application improves the integration and accuracy of the display module's control through signal mapping, feedback control, and signal conversion.

[0049] After introducing the application scenarios and design concepts of the embodiments of this application, the technical solutions provided by the embodiments of this application will be described below.

[0050] like Figure 1 As shown, this application embodiment provides a control system for a vehicle-mounted split display screen, including: a control module 100 disposed in the host SOC, and a response module 200 disposed in the display screen SOC;

[0051] like Figure 2 As shown, the control module 100 includes: a video signal generation unit 101, a status monitoring unit 102, a control signal generation unit 103, and a transmission unit 104;

[0052] The video signal generation unit 101 is used to generate a video signal; the video signal can be a DSI signal or an LVDS signal.

[0053] The status monitoring unit 102 is used to monitor the status of the display screen through the control I / O port of the serializer and send abnormal status information to the control signal generation unit.

[0054] For example, a feedback pin of the deserializer's GPIO port controls the switching of the backlight device; correspondingly, a feedback pin of the serializer's GPIO port is used to receive the switching signal from the SOC controlling the backlight device. Deserializer initialization requires configuring the output of the deserializer's GPIO port to match the output of the serializer's GPIO1 port.

[0055] The control signal generation unit 103 is used to receive abnormal status information of the display screen and generate control commands for the display screen in IIC bus communication format.

[0056] The transmitting unit 104 is used to transmit video signals and control commands to the deserializer of the display screen via a serializer and an LDVS harness.

[0057] like Figure 3 As shown, the response module 200 includes: an initialization unit 201, a receiving unit 202, a display unit 203, a backlight management unit 204, a touch unit 205, and a status monitoring unit 206;

[0058] The initialization unit 201 is used to initialize the deserializer, the display chip, and the touch chip;

[0059] The screen hardware design connects the original MCU control I / O to the circuit of the deserializer unit, and the power supply of the deserializer is taken from the power supply of the overall split screen.

[0060] The SOC adds control circuitry for the display chip and touch chip, and connects the corresponding control ports to the serializer's peripheral circuitry.

[0061] The initialization of the deserializer unit is added to the SOC Driver, and the control I / O port of the deserializer is configured as the control I / O port associated with the serializer.

[0062] Add initialization to the SOC Driver, refer to the initialization timing and write parameters provided by the screen manufacturer for initialization, and then turn on the screen backlight device after initialization is complete.

[0063] The touch processing unit initialization is added to the SOC Driver. The initialization timing is referenced from the touch manufacturer. At this point, the main control logic of the split screen is complete, and the display chip and touch chip can work normally.

[0064] When the control program is set in the MCU, the above initialization unit is not needed. However, when it is ported to the SOC, the initialization unit needs to be set so that the display chip and the touch chip can work properly.

[0065] The receiving unit 202 is used to receive the video signal and control command after being parsed and processed by the deserializer, and send the video signal to the display unit and the control command to the backlight management unit.

[0066] The display unit 203 is used to output video signals in the form of images;

[0067] The backlight management unit 204 is used to turn on the screen backlight device, turn off the screen backlight device, or adjust the brightness of the backlight device according to the received control command.

[0068] The touch unit 205 is used to capture touch data from the display screen, convert the touch data into IIC bus communication format data, and then send it to the input system; the input system includes at least a keyboard and a mouse;

[0069] The status monitoring unit 206 is used to monitor the status of the display screen and output a status signal to the deserializer.

[0070] In this embodiment, the status monitoring unit includes a temperature monitoring subunit and a screen status monitoring subunit:

[0071] The temperature monitoring subunit is used to monitor the display temperature and send the temperature status information to the control I / O port of the deserializer; that is, when the display temperature exceeds 45 degrees Celsius, the display brightness will be reduced to reduce power consumption and temperature.

[0072] like Figure 4 As shown, the temperature monitoring subunit includes: the output terminal RTC_DET of a thermistor, a first power supply terminal Vcc1, a first resistor R1, a second resistor R2, a third resistor R3, a temperature comparator U1, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth resistor R4, a monitoring output TFT_NEC_DET, and a second power supply terminal Vcc2; wherein, the voltage of the first power supply terminal Vcc1 and the second power supply terminal Vcc2 is 3V;

[0073] The output terminal RTC_DET of the thermistor is connected to pin 1 of the temperature comparator U1 through one end of the second resistor R2; the first power supply terminal Vcc1 is connected to pin 3 of the temperature comparator U1 through one end of the first resistor R1 and the third resistor R3; the common terminal of the second resistor R2 and the third resistor R3 is grounded, and pin 2 of the temperature comparator U1 is grounded.

[0074] Pin 5 of temperature comparator U1 is connected to the second power supply terminal Vcc2 through one end of the first capacitor C1, the second capacitor C2, and one end of the fourth resistor R4. Pin 4 of temperature comparator U1 is connected to the monitoring output TFT_NEC_DET through the common terminal of the third capacitor C3 and the fourth resistor R4. The common terminal of the first capacitor C1, the second capacitor C2, and the third capacitor C3 is grounded.

[0075] The thermistor outputs the screen temperature; the temperature comparator U1 compares the screen temperature with 45 degrees Celsius. If the screen temperature is greater than 45 degrees Celsius, the monitoring output terminal outputs "1" to the corresponding feedback pin of the control IO port of the deserializer, where "1" indicates an abnormal temperature. Otherwise, it outputs "0" to the corresponding feedback pin of the control IO port of the deserializer, where "0" indicates a normal temperature.

[0076] The screen status monitoring subunit is used to monitor the screen status and send the screen status to the control I / O port of the deserializer. Specifically, it is used for:

[0077] When a screen error is detected, a "1" is sent to the corresponding feedback pin of the deserializer's control I / O port, indicating that the screen status is abnormal; otherwise, a "0" is sent to the corresponding feedback pin of the deserializer's control I / O port, indicating that the screen status is normal.

[0078] Correspondingly, the control signal generation unit includes:

[0079] The temperature control subunit is used to issue a control command to "set the backlight brightness to 10% of the maximum brightness value" when three consecutive abnormal temperature values ​​of "1" are obtained.

[0080] The screen control subunit is used to issue a control command to "turn off the screen backlight device and initialize the display screen" when three consecutive abnormal screen status values ​​of "1" are obtained.

[0081] The purpose of setting up three consecutive monitoring sessions is to rule out the possibility that outliers are caused by data jumps.

[0082] Furthermore, although the operations of the method of this application are described in a specific order in the accompanying drawings, this does not require or imply that these operations must be performed in that specific order, or that all the operations shown must be performed to achieve the desired result. Additionally or alternatively, certain steps may be omitted, multiple steps may be combined into one step, and / or one step may be broken down into multiple steps.

[0083] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A control system for a vehicle-mounted split display screen, characterized in that, include: The control module is located in the host SOC and the response module is located in the display SOC; The control module is used to generate video signals and send them to the display screen, and also to monitor the status of the display screen through port mapping. When the display screen has an abnormal status, it generates corresponding control commands and sends them to the display screen. The response module is used to receive video signals and output them for display, and also to monitor the status of the display screen and change the status of the display screen according to the control commands sent by the host. The control module includes: a video signal generation unit, a status monitoring unit, a control signal generation unit, and a transmission unit; The video signal generation unit is used to generate video signals; The status monitoring unit is used to monitor the status of the display screen through the control I / O port of the serializer and send abnormal status information to the control signal generation unit. The control signal generation unit is used to receive abnormal status information of the display screen and generate control commands for the display screen in IIC bus communication format. The transmitting unit is used to transmit video signals and control commands to the deserializer of the display screen via a serializer and an LDVS harness; The response module includes: an initialization unit, a receiving unit, a display unit, a backlight management unit, a touch unit, and a status monitoring unit; The initialization unit is used to initialize the deserializer, display chip, and touch chip; The receiving unit is used to receive the video signal and control command after being parsed and processed by the deserializer, and send the video signal to the display unit and the control command to the backlight management unit. The display unit is used to output video signals in the form of images; The backlight management unit is used to turn on the screen backlight device, turn off the screen backlight device, or adjust the brightness of the backlight device according to the received control command. The touch unit is used to capture touch data from the display screen, convert the touch data into data in the IIC bus communication format, and then send it to the input system; the input system includes at least a keyboard and a mouse; The status monitoring unit is used to monitor the status of the display screen and output a status signal to the deserializer.

2. The control system for the vehicle-mounted split display screen according to claim 1, characterized in that, The video signal is either a DSI signal or an LVDS signal.

3. The control system for the vehicle-mounted split display screen according to claim 1, characterized in that, The initialization unit includes: The deserializer initialization subunit is used to configure the deserializer's control I / O ports as the control I / O ports associated with the serializer; The display initialization subunit is used to initialize the display chip based on the display screen initialization timing and write parameters, and then turn on the screen backlight device after initialization is complete. The touch initialization subunit is used to initialize the touch chip based on the touch initialization timing.

4. The control system for the vehicle-mounted split display screen according to claim 3, characterized in that, The status monitoring unit includes: The temperature monitoring subunit is used to monitor the temperature of the display screen and send the temperature status to the control I / O port of the deserializer; The screen status monitoring subunit is used to monitor the screen status and send the screen status to the control I / O port of the deserializer.

5. The control system for the vehicle-mounted split display screen according to claim 4, characterized in that, The temperature monitoring subunit includes: an output terminal of a thermistor, a first power supply terminal, a first resistor, a second resistor, a third resistor, a temperature comparator, a first capacitor, a second capacitor, a third capacitor, a fourth resistor, a monitoring output terminal, and a second power supply terminal; wherein, The output terminal of the thermistor is connected to the pin (1) of the temperature comparator through one end of the second resistor; the first power supply terminal is connected to the pin (3) of the temperature comparator through one end of the first resistor and the third resistor; the common terminal of the second resistor and the third resistor is grounded, and the pin (2) of the temperature comparator is grounded; The pin (5) of the temperature comparator is connected to the second power supply terminal through one end of the first capacitor, one end of the second capacitor and one end of the fourth resistor, and the pin (4) of the temperature comparator is connected to the monitoring output terminal through the common terminal of the third capacitor and the fourth resistor; the common terminal of the first capacitor, the second capacitor and the third capacitor is grounded; The thermistor outputs the display temperature; the temperature comparator compares the display temperature with 45 degrees Celsius. If the display temperature is greater than 45 degrees Celsius, the monitoring output terminal outputs "1" to the corresponding feedback pin of the control IO port of the deserializer. "1" indicates an abnormal temperature state. Otherwise, it outputs "0" to the corresponding feedback pin of the control IO port of the deserializer. "0" indicates a normal temperature state.

6. The control system for the vehicle-mounted split display screen according to claim 5, characterized in that, The screen status monitoring subunit is specifically used for: When a screen error is detected, a "1" is sent to the corresponding feedback pin of the control I / O port of the deserializer, indicating that the screen status is abnormal; otherwise, a "0" is sent to the corresponding feedback pin of the control I / O port of the deserializer, indicating that the screen status is normal.

7. The control system for the vehicle-mounted split display screen according to claim 6, characterized in that, The control signal generation unit includes: The temperature control subunit is used to issue a control command to "set the backlight brightness to 10% of the maximum brightness value" when three consecutive abnormal temperature values ​​"1" are obtained. The screen control subunit is used to issue a control command to "turn off the screen backlight device and initialize the display screen" when three consecutive screen status abnormal values ​​"1" are obtained.

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