Automotive display driving system and its signal transmission method, driving method of the signal to be displayed, vehicle

Abstract

A vehicle display driving system and its signal transmission method, a driving method for the signal to be displayed, and a vehicle are disclosed. This relates to the field of vehicle technology and omits the need for a serializer / deserializer chip and a power supply chip, simplifying the architecture and reducing costs. The vehicle display driving system includes a control system, a first custom connector, a transmission line, a second custom connector, and a display system. The control system is configured to output multiple sub-signals, at least one of which is transmitted using a DP or eDP protocol. The first custom connector includes at least one DP or eDP interface. At least one first custom connector is connected to the control system. The transmission line includes multiple connecting lines. The first custom connector is connected to the transmission line. The second custom connector includes at least one DP or eDP interface. The second custom connector is connected to an adapter connecting line. The display system is connected to multiple second sub-transmission ports of the second custom connector. The display system is configured to receive the signal to be displayed and display it under the control of the signal.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to an automotive display driving system and its signal transmission method, a driving method for the signal to be displayed, and a vehicle. Background Technology

[0002] With the development of vehicle technology, people have higher and higher requirements for in-vehicle displays; high-resolution and high-refresh-rate in-vehicle display devices have appeared on the market, which has brought new challenges to the driving of in-vehicle display devices. Summary of the Invention

[0003] The technical problem solved by this application is: how to omit the encoder / decoder chip and its related power supply chip in the automotive display driver system, thereby simplifying the automotive display driver system and reducing costs.

[0004] On one hand, this application provides an automotive display driving system, including a control system, at least one first custom connector, at least one transmission line, at least one second custom connector, and at least one display system; the control system is configured to output at least one set of signals to be displayed, the signals to be displayed including multiple sub-signals, at least one of the multiple sub-signals being transmitted using a DP or eDP protocol; the first custom connector includes multiple first sub-transmission ports and multiple second sub-transmission ports corresponding to the multiple sub-signals in the set of signals to be displayed, each of the multiple first sub-transmission ports and multiple second sub-transmission ports including at least one DP or eDP interface corresponding to at least one sub-signal transmitted using a DP or eDP protocol; at least one first custom connector The system is connected to multiple first sub-transmission ports; the transmission line includes multiple connecting lines; the multiple connecting lines are respectively connected to the adapted second sub-transmission ports in the first custom connector; the second custom connector includes multiple first sub-transmission ports and multiple second sub-transmission ports corresponding to multiple sub-signals in a set of signals to be displayed, and each of the multiple first sub-transmission ports and multiple second sub-transmission ports includes at least one DP or eDP interface corresponding to at least one sub-signal transmitted using the DP or eDP protocol; the multiple first sub-transmission ports of the second custom connector are respectively connected to the adapted connecting lines; the display system is connected to the multiple second sub-transmission ports of the second custom connector, and the display system is configured to receive the signals to be displayed and display them under the control of the signals to be displayed.

[0005] The beneficial effects of some embodiments of this application are as follows: By setting a first custom connector and a second custom connector, both of which are custom physical interfaces, multiple sub-transmission ports in the connectors correspond to the transmission of multiple sub-signals, realizing that multiple sub-signals output by the control system, such as video sub-signals that require high-speed transmission and control command sub-signals and interrupt sub-signals that do not require high-speed transmission, can be directly transmitted in parallel over long distances; each sub-signal does not need to be encoded by a stringer chip and then deserialized by a deserializer chip, realizing the direct driving of each sub-signal to the display system, shortening the transmission path of each sub-signal, and improving the transmission rate of each sub-signal; the stringer chip and its related power supply chip in the traditional solution are omitted, simplifying the automotive display driving system and significantly reducing costs; and the first custom connector and the second custom connector can be reused, with a wide range of applications.

[0006] In some embodiments, the multiple sub-signals of the signal to be displayed include video sub-signals, which are transmitted to the display system via the DP or eDP interface of the first custom connector and the DP or eDP interface of the second custom connector using the DP or eDP protocol.

[0007] In some embodiments, the control system includes a system-on-a-chip (SoC) connected to a plurality of first sub-transmission ports of at least one first custom connector. The SoC is configured to output at least one set of signals to be displayed, and at least one sub-signal of the signals to be displayed is transmitted using a DP or eDP protocol.

[0008] A system-on-a-chip (SoC) is an integrated circuit with a specific purpose, which contains a complete system and all the embedded software.

[0009] In some embodiments, the control system includes a system-on-a-chip (SoC) and at least one first conversion chip. The DP or eDP interfaces of a plurality of first sub-transmission ports of a first custom connector are connected to the SoC through the first conversion chip. The SoC is configured to output at least one set of initial signals to be displayed, the initial signals to be displayed including a plurality of initial sub-signals, at least one of the initial sub-signals being transmitted in accordance with an initial protocol. The first conversion chip is configured to receive the initial sub-signals transmitted in accordance with the initial protocol and convert them into sub-signals transmitted in accordance with the DP protocol.

[0010] In some embodiments, the control system includes a system-on-a-chip (SoC) and at least one first conversion chip. When the control system is configured to output multiple sets of signals to be displayed, the SoC includes at least one set of first output ports and at least one set of second output ports. The DP or eDP interfaces of multiple first sub-transmission ports of at least one first custom connector are respectively connected to at least one set of second output ports of the SoC through the first conversion chip. At least one first custom connector is correspondingly connected to at least one set of first output ports of the SoC. The SoC is configured to output a set of initial signals to be displayed through a set of second output ports and output a set of signals to be displayed through a set of first output ports. The initial signals to be displayed include multiple initial sub-signals, and at least one initial sub-signal is transmitted using an initial protocol. The first conversion chip is configured to receive the initial sub-signals transmitted using the initial protocol and convert them into sub-signals transmitted using the DP protocol.

[0011] In some embodiments, the display system includes a first vehicle-mounted display device connected to a second custom connector, wherein the first vehicle-mounted display device is configured to drive the display using a DP or eDP protocol.

[0012] In some embodiments, at least one display system includes a second vehicle-mounted display device and a second conversion chip, wherein the DP or eDP interfaces of a plurality of second sub-transmission ports of a second custom connector are connected to the second vehicle-mounted display device through the second conversion chip; the second conversion chip is configured to receive sub-signals transmitted in DP or eDP protocol and convert them into initial sub-signals transmitted in initial protocol; wherein the second vehicle-mounted display device is configured to drive the display in initial protocol.

[0013] In some embodiments, the signal to be displayed includes a video sub-signal, a DP control sub-signal, an interrupt sub-signal, a control command sub-signal, and a hot-plug sub-signal; the plurality of first sub-transmission ports and the plurality of second sub-transmission ports of the first custom connector each include a DP or eDP interface, a pair of DP control sub-signal transmission ports, a pair of control command sub-signal transmission ports, a hot-plug sub-signal transmission port, and an interrupt sub-signal transmission port. The DP or eDP interface includes at least a pair of video sub-signal transmission ports for transmitting video sub-signals; a pair of DP control sub-signal transmission ports for transmitting DP control sub-signals; a pair of control command sub-signal transmission ports for transmitting control command sub-signals; a hot-plug sub-signal transmission port for transmitting hot-plug sub-signals; and an interrupt sub-signal transmission port for transmitting interrupt sub-signals.

[0014] In some embodiments, the signal to be displayed further includes a backlight on sub-signal and a backlight brightness adjustment sub-signal; the multiple first sub-transmission ports and multiple second sub-transmission ports of the first custom connector further include a backlight on sub-signal transmission port and a backlight brightness adjustment sub-signal transmission port, wherein the backlight on sub-signal transmission port is used to transmit the backlight on sub-signal; and the backlight brightness adjustment sub-signal transmission port is used to transmit the backlight brightness adjustment sub-signal.

[0015] In some embodiments, the DP or eDP interface includes four pairs of video sub-signal transmission ports.

[0016] In some embodiments, the multiple connecting lines of the transmission line are coaxial connecting lines.

[0017] On the other hand, this application provides a signal transmission method for an automotive display driving system, applied to the aforementioned automotive display driving system. The signal transmission method for the automotive display driving system includes: the control system outputting at least one set of signals to be displayed, the signals to be displayed including multiple sub-signals, at least one of the multiple sub-signals being transmitted using a DP or eDP protocol; the multiple sub-signals of the signals to be displayed output by the control system being transmitted in parallel to the display system through a first custom connector, a transmission line, and a second custom connector; and the display system receiving the signals to be displayed and displaying them under the drive of the signals to be displayed.

[0018] By setting up a first custom connector and a second custom connector, both of which are custom physical interfaces, multiple sub-transmission ports in the connectors correspond to the transmission of multiple sub-signals, enabling the direct long-distance parallel transmission of multiple sub-signals output by the control system. For example, video sub-signals that require high-speed transmission and control command sub-signals and interrupt sub-signals that do not require high-speed transmission can be transmitted directly. Each sub-signal does not need to be encoded by an encoder chip and then deserialized by a deserializer chip, realizing the direct driving of each sub-signal to the display system, shortening the transmission path of each sub-signal, and improving the transmission rate of each sub-signal.

[0019] On the other hand, this application provides a driving method for a signal to be displayed, applied to the above-described automotive display driving system. The signal to be displayed received by the display system includes a video sub-signal, an interrupt sub-signal, and a control command sub-signal. The display system also receives a power-on signal. The time period in which the working level of the power-on signal is located is a first time period. The working level of the interrupt sub-signal is located in the first time period. The working level of the video sub-signal is located in the first time period. The working level of the control command sub-signal is located in the first time period.

[0020] The driving method for the displayed signal can achieve DP / EDP protocol transmission that meets the requirements of automotive display driving systems. The customized data timing transmission is parallel, eliminating the need for serialization by a serializer, resulting in higher real-time performance and accuracy. Because the data is not serialized, it has lower requirements for wiring and lower requirements for radiated emissions and interference immunity.

[0021] In some embodiments, the signal to be displayed further includes a backlight on sub-signal and a backlight brightness adjustment sub-signal; the operating level of the backlight brightness adjustment sub-signal is in a second time period; the operating level of the backlight on sub-signal is in the second time period; wherein, the second time period is included in the first time period.

[0022] In another aspect, this application provides a vehicle including the automotive display drive system as described above.

[0023] By setting up a first and a second custom connector, both of which are custom physical interfaces, multiple sub-transmission ports in the connectors correspond to the transmission of multiple sub-signals. This enables the direct, long-distance parallel transmission of multiple sub-signals output by the control system, such as video sub-signals requiring high-speed transmission and control command sub-signals and interrupt sub-signals that do not require high-speed transmission. Each sub-signal no longer needs to be encoded by an encoding chip and then deserialized by a deserializing chip, allowing each sub-signal to directly drive the display system. This shortens the transmission path of each sub-signal and improves its transmission rate. Furthermore, it eliminates the need for encoding / deserializing chips and their associated power supply chips in traditional solutions, simplifying the automotive display drive system and significantly reducing costs. Attached Figure Description

[0024] Figure 1A This is a schematic diagram of a display driver architecture provided in an embodiment of this application;

[0025] Figure 1B A schematic diagram of a planar structure of a stringer chip provided in an embodiment of this application;

[0026] Figure 2 A schematic diagram of an automotive display driving system provided in an embodiment of this application;

[0027] Figure 3 This is a schematic diagram of another automotive display driving system provided in an embodiment of this application;

[0028] Figure 4 A schematic diagram of another automotive display driving system provided in this application embodiment;

[0029] Figure 5 A schematic diagram of another automotive display driving system provided in this application embodiment;

[0030] Figure 6 A schematic diagram of another automotive display driving system provided in this application embodiment;

[0031] Figure 7A A matching circuit diagram for the DP protocol provided in this application embodiment;

[0032] Figure 7B A matching circuit diagram for the eDP protocol provided in this application embodiment;

[0033] Figure 8A A schematic diagram of a DP protocol transmission channel provided in an embodiment of this application;

[0034] Figure 8B A schematic diagram of an eDP protocol transmission channel provided in an embodiment of this application;

[0035] Figure 9 A schematic diagram of the pinout of a first custom connector provided in an embodiment of this application;

[0036] Figure 10 A schematic diagram of another first custom connector pin configuration provided in this application embodiment;

[0037] Figure 11 A schematic diagram illustrating a general standard interface definition for the DP protocol provided in this application embodiment;

[0038] Figure 12 A schematic diagram illustrating the definition of a Type-C general standard interface provided in an embodiment of this application;

[0039] Figure 13 This application provides a step diagram of a signal transmission method for an automotive display driving system according to an embodiment of the present application.

[0040] Figure 14 A standard transmission timing diagram of DP protocol or eDP protocol is provided for embodiments of this application;

[0041] Figure 15 This is a transmission timing diagram of a first custom connector provided for an embodiment of this application. Detailed Implementation

[0042] To enable those skilled in the art to better understand the technical solutions of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0043] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0044] With the advancement of vehicle intelligence, vehicles are increasingly equipped with high-resolution in-vehicle displays that provide a wide range of critical information, enabling drivers to operate the vehicle safely and effectively.

[0045] The vehicle's control chip integrates multiple drive control ports for in-vehicle display devices, commonly including DP (DisplayPort), eDP (Embedded DisplayPort), MIPI (Mobile Industry Processor Interface), LVDS (Low-Voltage Differential Signaling), and so on. DP, eDP, MIPI, and LVDS are different interface standards, and they differ in application, performance, and physical interface.

[0046] Among them, the DP protocol port is a digital display interface that supports high-resolution video and audio transmission. It is used to connect computers or other devices to display devices such as monitors or televisions, and can be used for both internal and external display connections. The eDP protocol port is an internal digital display interface based on the DP architecture and protocol. It is an extension of the DP architecture and protocol for embedded applications. The eDP protocol is fully compatible with the DP protocol and is used for internal display connections. It is widely used in various products with embedded display panels, such as all-in-one computers, laptops, and tablets. Currently, most automotive display devices use the DP protocol or eDP protocol to transmit video signals. The MIPI protocol port is an interface standard for mobile devices and embedded systems, standardizing the internal interfaces of mobile devices such as cameras, displays, basebands, and RF interfaces. The LVDS protocol port is a low-voltage differential signal transmission interface used to reduce electromagnetic interference during data transmission and is widely used in LCD displays and embedded systems.

[0047] Since LVDS and MIPI protocols cannot be directly transmitted over long distances through automotive wiring harnesses, additional conversion chips are required, such as FPD-LINK (encoding and deserializing) chips or GMSL (Gigabit Multimedia Serial Link) chips. The encoder chip in the conversion chip encodes the LVDS and MIPI protocols into FPD-LINK or GMSL protocols. After long-distance transmission, the deserializer chip in the conversion chip deserializes the FPD-LINK or GMSL protocols back into the corresponding LVDS and MIPI protocols, which are then delivered to the corresponding in-vehicle display device.

[0048] While the DP protocol can enable long-distance transmission in consumer electronics, it cannot meet the specific data signal transmission requirements of automobiles. For example, it cannot support the transmission of I2C (Inter-Integrated Circuit), INT (Interrupt), and ERR (Error) data. Therefore, additional conversion chips, such as FPD-LINK or GMSL chips, are required. The serializer chip in the conversion chip serializes the DP protocol into the FPD-LINK or GMSL protocol. After long-distance transmission, the deserializer chip in the conversion chip deserializes the FPD-LINK or GMSL protocol back into the corresponding DP protocol, which is then delivered to the corresponding in-vehicle display device.

[0049] Currently, the specific method for driving the vehicle-mounted display device 5 through string encoding and decoding is as follows: Figure 1AAs shown, signal 2 output by control chip 1 is transmitted via DP protocol and / or MIPI protocol and / or LVDS protocol, etc. Control chip 1 transmits the DP protocol and / or MIPI protocol and / or LVDS protocol, etc., to conversion chip 3, such as the encoder chip 3-1 in FPD-LINK chip or GMSL chip; encoder chip 3-1 encodes the received DP protocol and / or MIPI protocol and / or LVDS protocol, etc., into FPD-LINK protocol or GMSL protocol, and transmits the FPD-LINK protocol or GMSL protocol through... The automotive wiring harness 4, such as a coaxial cable or twisted-pair cable, transmits over a long distance to the deserializer chip 3-2 in the conversion chip 3. The deserializer chip 3-2 deserializes the received FPD-LINK protocol or GMSL protocol into the corresponding DP protocol and / or MIPI protocol and / or LVDS protocol, and transmits the deserialized DP protocol and / or MIPI protocol and / or LVDS protocol to the vehicle display device 5. After receiving the DP protocol and / or MIPI protocol and / or LVDS protocol, the vehicle display device 5 outputs the display screen corresponding to signal 2. Figure 1B The figure shown is a schematic diagram of the planar structure of the stringer chip 3-1.

[0050] This encoding and deserialization driving method is very complex. Signal 2 needs to go through the following link: control chip 1 → encoder chip 3-1 → automotive wiring harness 4 → deserializer chip 3-2 → vehicle display device 5 before it can reach the vehicle display device 5 for display. The transmission path is long, the cost is high, and the development difficulty is great.

[0051] In some embodiments, such as Figure 2As shown, this application provides an automotive display driving system 100, including a control system 10, at least one first custom connector 30, at least one transmission line 50, at least one second custom connector 40, and at least one display system 20; the control system 10 is configured to output at least one set of signals to be displayed 60, the signals to be displayed 60 including multiple sub-signals 61, at least one of the multiple sub-signals 61 being transmitted using a DP or eDP protocol; the first custom connector 30 includes multiple first sub-transmission ports 31 and multiple second sub-transmission ports 32 corresponding to the multiple sub-signals 61 in the set of signals to be displayed 60, each of the multiple first sub-transmission ports 31 and multiple second sub-transmission ports 32 including at least one DP or eDP interface corresponding to at least one sub-signal 61 transmitted using a DP or eDP protocol; the multiple first sub-transmission ports 31 of the at least one first custom connector 30 The system is connected to the control system 10; the transmission line 50 includes multiple connecting lines 51, each of which includes a DP coaxial cable; the multiple connecting lines 51 are respectively connected to the adapted second sub-transmission ports 32 in the first custom connector 30; the second custom connector 40 includes multiple first sub-transmission ports 41 and multiple second sub-transmission ports 42 corresponding to multiple sub-signals 61 in a set of signals to be displayed 60, each of the multiple first sub-transmission ports 41 and multiple second sub-transmission ports 42 including at least one DP or eDP interface corresponding to at least one sub-signal 61 transmitted using the DP or eDP protocol; the multiple first sub-transmission ports 41 of the second custom connector 40 are respectively connected to the adapted connecting lines 51; the display system 20 is connected to the multiple second sub-transmission ports 42 of the second custom connector 40, and the display system 20 is configured to receive the signals to be displayed 60 and display them under the control of the signals to be displayed 60.

[0052] For example, such as Figure 2 As shown, the control system 10 includes, for example, three sets of signal transmission interfaces 11. Each set of signal transmission interfaces 11 includes multiple signal output interfaces 11-N, for example, four signal output interfaces 11-N, namely, the first signal output interface 11-1, the second signal output interface 11-2, the third signal output interface 11-3, and the fourth signal output interface 11-4. The control system 10 can output a set of signals to be displayed 60 through one set of signal transmission interfaces 11, and output three sets of signals to be displayed 60 through the three sets of signal transmission interfaces 11.

[0053] For example, such as Figure 2As shown, a set of signals to be displayed 60 includes multiple sub-signals 61, for example, four sub-signals 61, namely, a first sub-signal 61-1, a second sub-signal 61-2, a third sub-signal 61-3, and a fourth sub-signal 61-4. Each sub-signal 61 is transmitted through a signal output interface 11-N adapted to it using an adapted signal protocol. It can be understood that the first sub-signal 61-1 is transmitted through the first signal output interface 11-1 using the transmission protocol adapted to the first sub-signal 61-1; the second sub-signal 61-2 is transmitted through the second signal output interface 11-2 using the transmission protocol adapted to the second sub-signal 61-2; the third sub-signal 61-3 is transmitted through the third signal output interface 11-3 using the transmission protocol adapted to the third sub-signal 61-3; and the fourth sub-signal 61-4 is transmitted through the fourth signal output interface 11-4 using the transmission protocol adapted to the fourth sub-signal 61-4. "Adaptation" here is interpreted as a specific sub-signal 61 being output through a specific signal output interface 11-N and transmitted through a specific signal protocol. It can be understood that a specific sub-signal 61 can only be output through a specific signal output interface 11-N and transmitted through a specific signal protocol; a specific sub-signal 61 cannot be output through other signal output interfaces 11-N, nor can it be transmitted through other signal protocols.

[0054] For example, such as Figure 2As shown, the automotive display driving system 100 includes, for example, three first custom connectors 30. Each first custom connector 30 corresponds to a set of signal transmission interfaces 11. Each first custom connector 30 includes multiple first sub-transmission ports 31 and multiple second sub-transmission ports 32, each corresponding to multiple sub-signals 61 in a set of signals to be displayed 60. For example, it includes four first sub-transmission ports 31 and four corresponding second sub-transmission ports 32. The four first sub-transmission ports 31 are the first first sub-transmission port 31-1, the second first sub-transmission port 31-2, the third first sub-transmission port 31-3, and the fourth first sub-transmission port 31-4, respectively. The four second sub-transmission ports 32 are the first second second sub-transmission port 32-1, the second second second sub-transmission port 32-2, the third second second sub-transmission port 32-3, and the fourth second sub-transmission port 32-4, respectively. The first sub-transmission port 31 and the second sub-transmission port 32 of the first custom connector 30 are in one-to-one correspondence, that is, the first first sub-transmission port 31-1 of the first custom connector 30 is connected to the first second sub-transmission port 32-1; the second first sub-transmission port 31-2 is connected to the second second sub-transmission port 32-2; the third first sub-transmission port 31-3 is connected to the third second sub-transmission port 32-3; and the fourth first sub-transmission port 31-4 is connected to the fourth second sub-transmission port 32-4. The multiple first sub-transmission ports 31 of the first custom connector 30 are respectively connected to the multiple adapted signal output interfaces 11-N, that is, the first first sub-transmission port 31-1 is connected to the first signal output interface 11-1; the second first sub-transmission port 31-2 is connected to the second signal output interface 11-2; the third first sub-transmission port 31-3 is connected to the third signal output interface 11-3; and the fourth first sub-transmission port 31-4 is connected to the fourth signal output interface 11-4.

[0055] For example, such as Figure 2As shown, the automotive display driving system 100 includes, for example, three second custom connectors 40, each corresponding to a first custom connector 30. Each second custom connector 40 includes multiple first sub-transmission ports 41 and multiple second sub-transmission ports 42 corresponding to multiple sub-signals 61 in a set of signals to be displayed 60, for example, four first sub-transmission ports 41 and four corresponding second sub-transmission ports 42; the four first sub-transmission ports 41 are respectively the first first sub-transmission port 41-1, the second first sub-transmission port 41-2, the third first sub-transmission port 41-3, and the fourth first sub-transmission port 41-4; the four second sub-transmission ports 42 are respectively the first second sub-transmission port 42-1, the second second sub-transmission port 42-2, the third second sub-transmission port 42-3, and the fourth second sub-transmission port 42-4. The first sub-transmission port 41 and the second sub-transmission port 42 of the second custom connector 40 are in one-to-one correspondence, that is, the first first sub-transmission port 41-1 of the second custom connector 40 is connected to the first second sub-transmission port 42-1; the second first sub-transmission port 41-2 is connected to the second second sub-transmission port 42-2; the third first sub-transmission port 41-3 is connected to the third second sub-transmission port 42-3; and the fourth first sub-transmission port 41-4 is connected to the fourth second sub-transmission port 42-4. The multiple second sub-transmission ports 32 of the first custom connector 30 are respectively connected to the multiple adapted first sub-transmission ports 41 in the second custom connector 40 through the connecting lines 51 in the transmission line 50. The first second sub-transmission port 32-1 of the first custom connector 30 is connected to the first first sub-transmission port 41-1 of the second custom connector 40 via a matching connecting cable 51; the second second sub-transmission port 32-2 of the first custom connector 30 is connected to the second first sub-transmission port 41-2 of the second custom connector 40 via a matching connecting cable 51; the third second sub-transmission port 32-3 of the first custom connector 30 is connected to the third first sub-transmission port 41-3 of the second custom connector 40 via a matching connecting cable 51; and the fourth second sub-transmission port 32-4 of the first custom connector 30 is connected to the fourth first sub-transmission port 41-4 of the second custom connector 40 via a matching connecting cable 51.

[0056] It should be noted that, in order to facilitate transmission, reduce the area occupied by multiple connecting lines 51, and avoid the messy distribution of multiple connecting lines 51, four connecting lines 51 are combined into one transmission line 50. It can be understood that the multiple connecting lines 51 within the transmission line 50 are insulated from each other and do not affect each other.

[0057] For example, such as Figure 2As shown, the automotive display drive system 100 includes, for example, three display systems 20. Each display system 20 corresponds to a second custom connector 40. Each display system 20 includes multiple signal input interfaces 21, for example, four signal input interfaces 21, namely a first signal input interface 21-1, a second signal input interface 21-2, a third signal input interface 21-3, and a fourth signal input interface 21-4. The multiple signal input interfaces 21 are respectively connected to multiple adapted second sub-transmission ports 42 in the second custom connector 40. That is, the first signal input interface 21-1 is connected to the first second sub-transmission port 42-1 in the second custom connector 40; the second signal input interface 21-2 is connected to the second second sub-transmission port 42-2 in the second custom connector 40; the third signal input interface 21-3 is connected to the third second sub-transmission port 42-3 in the second custom connector 40; and the fourth signal input interface 21-4 is connected to the fourth second sub-transmission port 42-4 in the second custom connector 40. The display system 20 displays in response to the received display signal 60.

[0058] For example, the matching circuit diagram of the DP protocol is as follows: Figure 7A As shown, the matching circuit diagram for the eDP protocol is as follows: Figure 7B As shown, the matching circuit requirements for the DP protocol and the eDP protocol are the same. Therefore, it can be seen that the DP protocol is fully compatible with the eDP protocol. Since the DP protocol is fully compatible with the eDP protocol, both the DP protocol and the eDP protocol can be transmitted through the DP interface, or both the DP protocol and the eDP protocol can be transmitted through the eDP interface.

[0059] For example, such as Figure 2 As shown, the first signal output interface 11-1 can be a DP or eDP interface; the first first sub-transmission port 31-1 of the first custom connector 30 can also be a DP or eDP interface, and the first second sub-transmission port 32-1 of the first custom connector 30 can also be a DP or eDP interface; the first first sub-transmission port 41-1 of the second custom connector 40 can also be a DP or eDP interface, and the first second sub-transmission port 42-1 of the second custom connector 40 can also be a DP or eDP interface; the first signal input interface 21-1 of the display system 20 can also be a DP or eDP interface. The sub-signal 61 of the display signal 60 output by the control system 10, which is transmitted using the DP or eDP protocol, is transmitted through the lines where the aforementioned DP or eDP interfaces are located.

[0060] Some embodiments of this disclosure, by setting a first custom connector 30 and a second custom connector 40, both of which are custom physical interfaces, allow the control system 10 to synchronously output multiple sub-signals 61 through multiple sub-ports corresponding to multiple sub-signals 61. For example, video sub-signals DP requiring high-speed transmission and control command sub-signals i2c and interrupt sub-signals int that do not require high-speed transmission can be directly transmitted in parallel over long distances. Each sub-signal 61 does not need to be encoded by the encoding chip 3-1 and then deserialized by the deserializing chip 3-2, thus realizing direct driving of the display system 20 by each sub-signal 61, shortening the transmission path of each sub-signal 61, and improving the transmission rate of each sub-signal 61. The encoding / deserializing chip and its related power supply chip in the traditional solution are omitted, simplifying the automotive display driving system 100 and significantly reducing costs. Furthermore, the first custom connector 30 and the second custom connector 40 can be reused, making it widely applicable.

[0061] In some embodiments, such as Figure 3 As shown, the multiple sub-signals 61 of the signal to be displayed 60 include a video sub-signal DP. The video sub-signal DP is transmitted to the display system 20 via the DP or eDP interface of the first custom connector 30, such as the first first sub-transmission port 31-1 and the first second sub-transmission port 32-1 of the first custom connector 30, and the DP or eDP interface of the second custom connector 40, such as the first first sub-transmission port 41-1 and the first second sub-transmission port 42-1 of the second custom connector 40.

[0062] In some embodiments, such as Figure 3 As shown, the control system 10 includes a system-on-a-chip (SOC), which is connected to a plurality of first sub-transmission ports 31 of at least one first custom connector 30. The SOC is configured to output at least one set of signals to be displayed 60, and at least one sub-signal 61 of the signals to be displayed 60 is transmitted in DP or eDP protocol.

[0063] For example, a system-on-a-chip (SoC) is a dedicated integrated circuit that contains a complete system and all embedded software. The SoC connects to, for example, three first custom connectors 30, and outputs, for example, three sets of signals 60 to be displayed; one set of signals 60 is transmitted through a first custom connector 30, wherein each set of signals 60 contains at least one sub-signal 61, such as a video sub-signal DP, which is transmitted directly using the DP or eDP protocol.

[0064] In some embodiments, such as Figure 3As shown, the display system 20 includes a first vehicle-mounted display device 22, which is connected to a second custom connector 40. The first vehicle-mounted display device 22 is configured to drive the display using a DP or eDP protocol.

[0065] For example, such as Figure 3 As shown, at least one sub-signal 61 output by the system-on-a-chip (SoC), such as a video sub-signal DP, is transmitted via the DP or eDP interface of the first custom connector 30 and the second custom connector 40 using the DP or eDP protocol. Specifically, at least one sub-signal 61 output by the SoC, such as the video sub-signal DP, is transmitted via the DP or eDP protocol to the first sub-transmission port 31-1 of the first custom connector 30, and then transmitted over a long distance via the transmission line 50 from the first second sub-transmission port 32-1 of the first custom connector 30 to the first sub-transmission port 41-1 of the second custom connector 40, and finally transmitted via the first second sub-transmission port 42-1 of the second custom connector 40 to the first vehicle-mounted display device 22. The first vehicle-mounted display device 22 can be directly driven to display an image by the sub-signal 61 transmitted using the DP or eDP protocol. It is understood that the first vehicle-mounted display device 22 includes at least one DP or eDP interface.

[0066] For example, since the DP protocol is fully compatible with the eDP protocol, the DP protocol and the eDP protocol can be transmitted through a DP interface, or the DP protocol and the eDP protocol can be transmitted through an eDP interface. Furthermore, the sub-signal 61 output by the system-on-a-chip (SOC) in the form of the DP or eDP protocol can directly drive the first vehicle display device 22 with the DP or eDP interface. That is, after the DP protocol and the eDP protocol are transmitted to the display system 20 in the above manner, if the interface of the first vehicle display device 22 includes the DP or eDP interface, the DP protocol and the eDP protocol can directly drive the first vehicle display device 22.

[0067] Using the DP protocol / eDP (open source and free) as a display driver in automobiles, the first vehicle display device 22 uses a TCON chip with a matching DP or eDP protocol, which can save the encoding and deserializing chip and directly transmit the DP protocol / eDP protocol over long distances.

[0068] In some embodiments, such as Figure 4As shown, the control system 10 includes a system-on-a-chip (SOC) and at least one first conversion chip 70. The DP or eDP interfaces of multiple first sub-transmission ports 31 of the first custom connector 30 are connected to the SOC through the first conversion chip 70. The SOC is configured to output at least one set of initial signals to be displayed 60', which includes multiple initial sub-signals 61'. At least one initial sub-signal 61' is transmitted using an initial protocol. The first conversion chip 70 is configured to receive the initial sub-signals 61' transmitted using the initial protocol and convert them into sub-signals 61' transmitted using the DP protocol.

[0069] For example, the initial protocol includes the LVDS protocol or the MIPI protocol; the first conversion chip 70 includes an LVDS to DP chip 71 or a MIPI to DP chip 72.

[0070] Specifically, an initial sub-signal 61' output by the system-on-a-chip (SoC), such as an initial video sub-signal DP', is transmitted to an LVDS-to-DP converter chip 71 via the LVDS protocol. The LVDS-to-DP converter chip 71 converts the initial sub-signal 61' transmitted via the LVDS protocol, such as the initial video sub-signal DP', into a sub-signal 61 transmitted via the DP protocol, such as the video sub-signal DP, and outputs it to the control system 10. It can be understood that, apart from the initial sub-signal 61' transmitted via the LVDS protocol, which needs to be converted by the LVDS-to-DP converter chip 71, other initial sub-signals 61' output by the SoC do not need to be converted and are directly treated as sub-signals 61 and output to the control system 10. The sub-signal 61 transmitted in DP protocol, such as the video sub-signal DP, is transmitted to the first first sub-transmission port 31-1 of the first custom connector 30. It is then transmitted over a long distance via the transmission line 50 from the first second sub-transmission port 32-1 of the first custom connector 30 to the first first sub-transmission port 41-1 of the second custom connector 40. Finally, it is transmitted from the first second sub-transmission port 42-1 of the second custom connector 40 to the first vehicle display device 22.

[0071] Alternatively, an initial sub-signal 61' output by the system-on-a-chip (SoC), such as an initial video sub-signal DP', is transmitted to a MIPI-to-DP converter 72 via the MIPI protocol. The MIPI-to-DP converter 72 converts the initial sub-signal 61' transmitted via the MIPI protocol, such as the initial video sub-signal DP', into a sub-signal 61 transmitted via the DP protocol, such as the video sub-signal DP, and outputs it to the control system 10. It can be understood that, apart from the initial sub-signal 61' transmitted via the MIPI protocol, which needs to be converted by the MIPI-to-DP converter 72, other initial sub-signals 61' output by the SoC do not need to be converted and are directly treated as sub-signals 61 and output to the control system 10. The sub-signal 61 transmitted in DP protocol, such as the video sub-signal DP, is transmitted to the first first sub-transmission port 31-1 of the first custom connector 30. It is then transmitted over a long distance via the transmission line 50 from the first second sub-transmission port 32-1 of the first custom connector 30 to the first first sub-transmission port 41-1 of the second custom connector 40. Finally, it is transmitted from the first second sub-transmission port 42-1 of the second custom connector 40 to the first vehicle display device 22.

[0072] It should be noted that the first sub-transmission port 31-1 of the first custom connector 30 is a DP or eDP interface, and the first second sub-transmission port 32-1 of the first custom connector 30 is also a DP or eDP interface; the first first sub-transmission port 41-1 of the second custom connector 40 is also a DP or eDP interface, and the first second sub-transmission port 42-1 of the second custom connector 40 is also a DP or eDP interface; the first signal input interface 21-1 of the first vehicle display device 22 is also a DP or eDP interface.

[0073] In some embodiments, such as Figure 5As shown, the control system 10 includes a system-on-a-chip (SOC) and at least one first conversion chip 70. When the control system 10 is configured to output multiple sets of signals to be displayed 60, the SOC includes at least one set of first output ports 12 and at least one set of second output ports 13. The DP or eDP interfaces of multiple first sub-transmission ports 31 of at least one first custom connector 30 are respectively connected to at least one set of second output ports 13 of the SOC through the first conversion chip 70. At least one first custom connector 30 is correspondingly connected to at least one set of first output ports 12 of the SOC. The SOC is configured to output a set of initial signals to be displayed 60' through a set of second output ports 13 and a set of signals to be displayed 60 through a set of first output ports 12. The initial signals to be displayed 60' include multiple initial sub-signals 61', and at least one initial sub-signal 61' is transmitted using an initial protocol. The first conversion chip 70 is configured to receive the initial sub-signals 61' transmitted using the initial protocol and convert them into sub-signals 61 transmitted using the DP protocol.

[0074] For example, such as Figure 5 As shown, the control system 10 outputs three sets of signals 60 to be displayed, and the automotive display drive system 100 includes three first custom connectors 30. The initial protocol includes LVDS protocol or MIPI protocol; the first conversion chip 70 includes an LVDS to DP chip 71 or a MIPI to DP chip 72.

[0075] For example, such as Figure 5 As shown, the control system 10 includes a system-on-a-chip (SOC) and two first conversion chips 70. The SOC includes a set of first output ports 12 and two sets of second output ports 13. The SOC outputs a set of signals to be displayed 60 through the first output ports 12. Each signal 60 includes a sub-signal transmitted using the DP or eDP protocol, such as a video sub-signal DP. Multiple first sub-output ports in the first output ports 12 are respectively connected to multiple first sub-transmission ports 31 of one of the first custom connectors 30. For example, a sub-output port in the first output port 12 that outputs a sub-signal transmitted using the DP or eDP protocol is connected to the DP sub-signal in the first custom connector 30 via a DP interface. Sub-output ports in the first output port 12 that output other sub-signals are respectively connected to the first sub-transmission ports 31 in the first custom connector 30 that transmit the corresponding sub-signals. The set of signals to be displayed 60 is transmitted through this first custom connector 30, wherein at least one sub-signal 61, such as the video sub-signal DP, is directly transmitted using the DP or eDP protocol.

[0076] For example, such as Figure 5As shown, the DP or eDP interfaces of multiple first sub-transmission ports 31 of another first custom connector 30 are connected to the first conversion chip 70, such as the LVDS to DP chip 71. The first conversion chip 70, such as the LVDS to DP chip 71, is connected to a sub-transmission port of one of the second output ports 13 of the system-on-a-chip (SOC) that outputs sub-signals transmitted using an initial protocol, such as the LVDS protocol. The SOC outputs a set of initial display signals 60' through this second output port 13. The initial display signals 60' include multiple initial sub-signals 61', one of which is an initial video sub-signal. The initial sub-signal 61' transmitted via LVDS protocol is sent to the LVDS-to-DP converter chip 71. The LVDS-to-DP converter chip 71 converts the initial sub-signal 61' transmitted via LVDS protocol, such as the initial video sub-signal DP', into a sub-signal 61 transmitted via DP protocol, such as the video sub-signal DP, and outputs it to the control system 10. It can be understood that, apart from the initial sub-signal 61' transmitted via LVDS protocol, which needs to be converted by the LVDS-to-DP converter chip 71, other initial sub-signals 61' output by the system-on-a-chip (SOC) do not need to be converted and are directly treated as sub-signals 61 and output to the control system 10. The sub-signal 61 transmitted via DP protocol, such as the video sub-signal DP, is transmitted to the first first sub-transmission port 31-1 of the first custom connector 30, and then transmitted over a long distance via the transmission line 50 from the first second sub-transmission port 32-1 of the first custom connector 30 to the first first sub-transmission port 41-1 of the second custom connector 40, and finally transmitted via the first second sub-transmission port 42-1 of the second custom connector 40 to the first vehicle display device 22.

[0077] It should be noted that the first sub-transmission port 31-1 of the first custom connector 30 is a DP or eDP interface, and the first second sub-transmission port 32-1 of the first custom connector 30 is also a DP or eDP interface; the first first sub-transmission port 41-1 of the second custom connector 40 is also a DP or eDP interface, and the first second sub-transmission port 42-1 of the second custom connector 40 is also a DP or eDP interface; the first signal input interface 21-1 of the first vehicle display device 22 is also a DP or eDP interface.

[0078] For example, such as Figure 5As shown, the DP or eDP interfaces of multiple first sub-transmission ports 31 of another first custom connector 30 are connected to the first conversion chip 70, such as the MIPI to DP chip 72. The first conversion chip 70, such as the MIPI to DP chip 72, is connected to the sub-transmission port of another set of second output ports 13 of the system-on-a-chip (SOC) that outputs sub-signals transmitted using an initial protocol, such as the MIPI protocol. The SOC outputs a set of initial display signals 60' through this second output port 13. The initial display signals 60' include multiple initial sub-signals 61', one of which is an initial video sub-signal. The initial sub-signal 61' transmitted via the MIPI protocol is sent to the MIPI-to-DP converter chip 72. The MIPI-to-DP converter chip 72 converts the initial sub-signal 61' transmitted via the MIPI protocol, such as the initial video sub-signal DP', into a sub-signal 61 transmitted via the DP protocol, such as the video sub-signal DP, and outputs it to the control system 10. It can be understood that, apart from the initial sub-signal 61' transmitted via the MIPI protocol, which needs to be converted by the MIPI-to-DP converter chip 72, other initial sub-signals 61' output by the system-on-a-chip (SOC) do not need to be converted and are directly output to the control system 10 as sub-signals 61. The sub-signal 61 transmitted via the DP protocol, such as the video sub-signal DP, is transmitted to the first first sub-transmission port 31-1 of the first custom connector 30, and then transmitted over a long distance via the transmission line 50 from the first second sub-transmission port 32-1 of the first custom connector 30 to the first first sub-transmission port 41-1 of the second custom connector 40, and finally transmitted via the first second sub-transmission port 42-1 of the second custom connector 40 to the first vehicle display device 22.

[0079] It should be noted that the first sub-transmission port 31-1 of the first custom connector 30 is a DP or eDP interface, and the first second sub-transmission port 32-1 of the first custom connector 30 is also a DP or eDP interface; the first first sub-transmission port 41-1 of the second custom connector 40 is also a DP or eDP interface, and the first second sub-transmission port 42-1 of the second custom connector 40 is also a DP or eDP interface; the first signal input interface 21-1 of the first vehicle display device 22 is also a DP or eDP interface.

[0080] In some embodiments, such as Figure 6As shown, at least one display system 20 includes a second vehicle-mounted display device 23 and a second conversion chip 80. The DP or eDP interfaces of a plurality of second sub-transmission ports 42 of the second custom connector 40 are connected to the second vehicle-mounted display device 23 through the second conversion chip 80. The second conversion chip 80 is configured to receive sub-signals 61 transmitted in DP or eDP protocol and convert them into initial sub-signals 61' transmitted in initial protocol. The second vehicle-mounted display device 23 is configured to drive the display in initial protocol.

[0081] For example, such as Figure 6 As shown, the second vehicle-mounted display device 23 has multiple signal input interfaces 21 including LVDS interfaces, for example, the first signal input interface 21-1 is an LVDS interface; the second custom connector 40 has multiple second sub-transmission ports 42 including DP or eDP interfaces, for example, the first first sub-transmission port 41-1 is a DP or eDP interface. Since the DP or eDP interface of the second custom connector 40 cannot transmit signals to the second vehicle display device 23 with an LVDS interface, the DP or eDP protocol transmitted from the DP or eDP interface of the second custom connector 40 needs to be converted by the second conversion core 80, which includes a DP to LVDS chip 81. For example, the DP or eDP protocol transmitted from the DP or eDP interface of the second custom connector 40 is converted to an LVDS protocol by the DP to LVDS chip 81, and then the LVDS protocol is transmitted to the LVDS interface of the second vehicle display device 23. Alternatively, the multiple signal input interfaces 21 of the second vehicle display device 23 include MIPI interfaces, for example, the first signal input interface 21-1 is a MIPI interface. The multiple second sub-transmission ports 42 of the second custom connector 40 include DP or eDP interfaces, for example, the first first sub-transmission port 41-1 is a DP or eDP interface. The DP or eDP protocol transmitted from the DP or eDP interface of the second custom connector 40 is converted into the MIPI protocol by the DP to MIPI chip 82, and then the MIPI protocol is transmitted to the MIPI interface of the second vehicle display device 23; thereby driving the second vehicle display device 23 to perform display.

[0082] The second vehicle-mounted display device 23 can be directly driven to display images by sub-signals 61 transmitted using the LVDS or MIPI protocol. It is understood that the second vehicle-mounted display device 23 includes at least one LVDS or MIPI interface.

[0083] In some embodiments, the signal to be displayed 60 includes a video sub-signal DP, a DP control sub-signal aux, an interrupt sub-signal int, a control command sub-signal i2c, and a hot-plug sub-signal hpd; such as Figure 9As shown, the first custom connector 30 includes multiple first sub-transmission ports 31 and multiple second sub-transmission ports 32, each comprising a DP or eDP interface, a pair of DP control sub-signal transmission ports AUXP / AUXN, a pair of control command sub-signal transmission ports I2C-SDA / I2C-SCL, a hot-plug sub-signal transmission port HPD, and an interrupt sub-signal transmission port INT. The DP or eDP interface includes at least one pair of video sub-signal transmission ports TXP / TXN, which are used to transmit the video sub-signal DP; the pair of DP control sub-signal transmission ports AUXP / AUXN are used to transmit the DP control sub-signal aux; the pair of control command sub-signal transmission ports I2C-SDA / I2C-SCL are used to transmit the control command sub-signal i2c; the hot-plug sub-signal transmission port HPD is used to transmit the hot-plug sub-signal hpd; and the interrupt sub-signal transmission port INT is used to transmit the interrupt sub-signal int. In some embodiments, the video sub-signal transmission ports TXP / TXN may also be referred to as DP interfaces.

[0084] In some embodiments, the signal to be displayed 60 further includes a backlight on sub-signal bl-en and a backlight brightness adjustment sub-signal bl-pwm; such as Figure 9 As shown, the first custom connector 30 also includes a backlight on sub-transmission port 31 and a backlight brightness adjustment sub-transmission port 32, which are used to transmit the backlight on sub-signal BL-EN and the backlight brightness adjustment sub-signal BL-PWM. The backlight on sub-signal BL-EN is used to transmit the backlight on sub-signal bl-en; the backlight brightness adjustment sub-signal BL-PWM is used to transmit the backlight brightness adjustment sub-signal bl-pwm.

[0085] For example, both the DP protocol and the eDP protocol are free and open-source high-definition digital display interface standards developed by VESA (Video Electronics Standards Association). Figure 8A , Figure 8B As shown, the physical layer transmission channels are all composed of the main link 202, the power enable pin 201, and the hot-swappable pin 203. These essential channels have been defined in the interface definitions of the first custom connector 30 and the second custom connector 40.

[0086] In some embodiments, the DP or eDP interface of the first custom connector 30 includes four pairs of video sub-signal transmission ports TXP / TXN, namely TX0P / TX0N, TX1P / TX1N, TX2P / TX2N, and TX3P / TX3N. The video sub-signal transmission ports TXP / TXN are used to transmit the differential signals of the video sub-signal DP.

[0087] For example, the system-on-a-chip (SoC) can output a display signal 60 and transmit it via a corresponding protocol, such as DP, MIPI, LVDS, or I2C. The display signal 60 can be an image, text, GIF, video, audio, or control signals from the display system 20. These control signals include, but are not limited to, Universal Asynchronous Receiver / Receiver (UART), interrupt sub-signal int, control command sub-signal i2c, hot-plug sub-signal hpd, backlight on sub-signal bl-en, backlight brightness adjustment sub-signal bl-pwm, and error feedback sub-signal ERR. If the encoder / deserializer is removed and these control signals from the display system 20 need to be transmitted directly, then these signals need to be defined to facilitate long-distance parallel transmission.

[0088] For example, I2C (Inter-Integrated Circuit) is a two-wire serial communication bus, mainly used to transmit some control commands; INT (Interrupt signal) is a signal sent by the terminal driver when the user types, and its corresponding operation is to normally close all processes, used for interrupt signal feedback; ERR (Error feedback signal) refers to the occurrence of an error; BL_EN is used to turn on the backlight; BL_PWM is used to adjust the backlight brightness; UART (Universal Asynchronous Receiver / Transmitter) is a universal serial data bus used for asynchronous communication.

[0089] For example, to meet the maximum transmission requirements, such as Figure 9 As shown, the first custom connector 30 can have 16 first sub-transmission ports 31, with 16 corresponding connecting lines 51 for transmitting various signals. For example, the first custom connector 30's multiple first sub-transmission ports 31 may include: four pairs of video sub-signal transmission ports TXP / TXN, one pair of DP control sub-signal transmission ports AUXP / AUXN, one pair of control command sub-signal transmission ports I2C-SDA / I2C-SCL, a hot-plug sub-signal transmission port HPD, an interrupt sub-signal transmission port INT, a backlight on sub-signal transmission port BL-EN, and a backlight brightness adjustment sub-signal transmission port BL-PWM. Multiple second sub-transmission ports 32 are configured correspondingly to the multiple first sub-transmission ports 31, i.e., the multiple second sub-transmission ports 32 are also set to 16, and connected to 16 corresponding connecting lines 51. The second custom connector 40 is similar to the first custom connector 30.

[0090] The number of 16 first sub-transmission ports 31 and the corresponding 16 connecting lines 51 of the first custom connector 30 can be reduced or decreased according to the needs of transmitting multiple sub-signals 61. For example, the number of 16 first sub-transmission ports 31 and the corresponding 16 connecting lines 51 of the first custom connector 30 can be reduced or decreased according to the different resolutions and refresh rates of the transmitted video sub-signals DP.

[0091] In some embodiments, taking DP protocol 1.4 as an example, the transmission rate of one pair of video sub-signal transmission ports TXP / TXN, such as TX0P / TX0N, can be, for example, 8Gbps. The transmission rate of four pairs of video sub-signal transmission ports TXP / TXN, such as TX0P / TX0N, TX1P / TX1N, TX2P / TX2N, and TX3P / TX3N, can be as high as, for example, 32Gbps. Theoretically, one pair of video sub-signal transmission ports TXP / TXN can transmit 2K resolution video at a refresh rate of 60Hz, which can be achieved using only one pair of video sub-signal transmission ports TXP / TXN.

[0092] To ensure reliable signal transmission, the interrupt sub-signal int requires a separate connection line 51 for transmission. The backlight on sub-signal bl-en and the backlight brightness adjustment sub-signal bl-pwm can both be transmitted transparently through the control command sub-signal transmission port I2C-SDA / I2C-SCL, and are transmitted to the display system 20 via connection line 51. Therefore, if... Figure 10 As shown, the first custom connector 30 can have at least eight first sub-transmission ports 31, namely a pair of video sub-signal transmission ports TXP / TXN, a pair of DP control sub-signal transmission ports AUXP / AUXN, a pair of control command sub-signal transmission ports I2C-SDA / I2C-SCL, a hot-plug sub-signal transmission port HPD, and an interrupt sub-signal transmission port INT. Multiple second sub-transmission ports 32 are configured correspondingly to the multiple first sub-transmission ports 31, meaning there are also eight second sub-transmission ports 32, and they are connected to eight corresponding connecting lines 51. The second custom connector 40 is configured similarly to the first custom connector 30.

[0093] For example, the first custom connector 30 requires a maximum of 16 first sub-transmission ports 31 and corresponding 16 connecting cables 51. The number of first sub-transmission ports 31 and corresponding connecting cables 51 can be customized according to actual needs. Furthermore, to save costs, commercially available mature interfaces and cables can be used, and these interfaces and cables can be customized to meet specific physical interface requirements. Commercially available mature interfaces include the DP protocol universal interface and the Type-C interface, while commercially available mature cables are coaxial cables.

[0094] The definition of the DP protocol's general standard interface is as follows: Figure 11As shown, the DP standard interface is 20 pins, which meets the requirement of the first custom connector 30's maximum interface of 16 pins. The definition of the Type-C general standard interface is as follows. Figure 12 As shown, the Type-C standard interface has 24 pins, which also meets the requirement of the first custom connector 30 to maximize the interface to 16 pins. Therefore, the DP standard interface or Type-C standard interface can be customized according to the actual needs of the project to become the desired custom physical interface. The second custom connector 40 is similar to the first custom connector 30.

[0095] In some embodiments, the multiple connecting lines 51 of the transmission line 50 are coaxial connecting lines.

[0096] On the other hand, this application provides a signal transmission method for an automotive display driving system, applied to the automotive display driving system 100 described above, such as... Figure 13 As shown, the signal transmission method of the automotive display driving system includes: S1, the control system 10 outputs at least one set of signals to be displayed 60, the signals to be displayed 60 include multiple sub-signals 61, and at least one of the multiple sub-signals 61 is transmitted using the DP or eDP protocol; S2, the multiple sub-signals 61 of the signals to be displayed 60 output by the control system 10 are transmitted in parallel to the display system 20 through a first custom connector 30, a transmission line 50, and a second custom connector 40; S3, the display system 20 receives the signals to be displayed 60 and displays them under the drive of the signals to be displayed 60.

[0097] Some embodiments of this disclosure, by setting a first custom connector 30 and a second custom connector 40, both of which are custom physical interfaces, allow multiple sub-transmission ports in the connectors to transmit multiple sub-signals 61. This enables the multiple sub-signals 61 output by the control system 10, such as the video sub-signal DP which requires high-speed transmission, and the control command sub-signals i2c and interrupt sub-signals int which do not require high-speed transmission, to be directly transmitted in parallel over long distances. Each sub-signal 61 does not need to be encoded by the encoding chip 3-1 and then deserialized by the deserializing chip 3-2. This enables each sub-signal 61 to directly drive the display system 20, shortens the transmission path of each sub-signal 61, and improves the transmission rate of each sub-signal 61.

[0098] On the other hand, this application provides a driving method 200 for a signal to be displayed, applied in the automotive display driving system 100 described above. The signal to be displayed 60 received by the display system 20 includes a video sub-signal DP, an interrupt sub-signal int, and a control command sub-signal i2c. The display system 20 also receives a power-on signal LCD-VCC. Figure 15As shown, the operating level of the power-on signal LCD-VCC is in the first time period t1; the operating level of the interrupt sub-signal int is in the first time period t1; the operating level of the video sub-signal DP is in the first time period t1; and the operating level of the control command sub-signal i2c is in the first time period t1.

[0099] In some embodiments, the signal to be displayed 60 further includes a backlight on sub-signal bl-en and a backlight brightness adjustment sub-signal bl-pwm; such as Figure 15 As shown, the working level of the backlight brightness adjustment sub-signal bl-pwm is in the second time period t2; the working level of the backlight on sub-signal bl-en is in the second time period t2; wherein, the second time period t2 is included in the first time period t1.

[0100] like Figure 14 The diagram shown is a standard transmission timing diagram for the DP or eDP protocol, including the transmission timing of the power-on signal LCD-VCC, the eDP protocol, and the hot-plug sub-signal hpd, but it does not meet the transmission requirements of automobiles. In addition to the standard DP / EDP protocol transmission timing, the transmission timing of the interrupt sub-signal int, the control command sub-signal i2c, and the backlight brightness adjustment sub-signal bl-pwm also needs to be added. The interrupt sub-signal int needs to remain high after the power-on signal LCD-VCC is completed until power-off. The backlight brightness adjustment sub-signal bl-pwm needs to maintain a stable waveform output during the backlight on sub-signal bl-en, and the duty cycle of this waveform can be adjusted as needed. The control command sub-signal i2c (i2c-sda / i2c-scl) starts outputting after the hot-plug sub-signal hpd handshake signal goes high. During output, screen configuration, register status, and other operations can be read as needed, and it is turned off after power-off. Through the above timing, DP / EDP protocol transmission that meets the requirements of the automotive display driver system 100 can be achieved.

[0101] As can be seen from the driving method 200 for the signal to be displayed, the custom data timing transmission is parallel, without the need for serialization by a serializer, resulting in higher real-time performance and accuracy. Since the data is not serialized, its requirements for wiring are lower, and it has lower requirements for radiated emissions and interference immunity.

[0102] Some embodiments of the driving method 200 for the signal to be displayed can better realize the DP / EDP protocol transmission that meets the requirements of the automotive display driving system 100, and achieve better transmission effect.

[0103] In another aspect, this application provides a vehicle including the automotive display drive system 100 as described above.

[0104] Some embodiments of this disclosure, by setting a first custom connector 30 and a second custom connector 40, both of which are custom physical interfaces, allow multiple sub-transmission ports in the connectors to transmit multiple sub-signals 61. This enables the direct, long-distance parallel transmission of multiple sub-signals 61 output by the control system 10, such as the video sub-signal DP requiring high-speed transmission and the control command sub-signals i2c and interrupt sub-signals int that do not require high-speed transmission. Each sub-signal 61 does not need to be encoded by the encoding chip 3-1 and then deserialized by the deserializing chip 3-2, thus enabling each sub-signal 61 to directly drive the display system 20, shortening the transmission path of each sub-signal 61, and improving the transmission rate of each sub-signal 61. This eliminates the need for the encoding / deserializing chip and its related power supply chip in traditional solutions, simplifying the automotive display drive system 100 and significantly reducing costs.

Claims

1. An automotive display driving system, characterized by comprising: The application relates to a display system, comprising: a control system configured to output at least one set of to-be-displayed signals, the to-be-displayed signals comprising a plurality of sub-signals, at least one of the plurality of sub-signals being transmitted in a DP or eDP protocol; at least one first customized connector, the first customized connector comprising a plurality of first sub-transmission ports and a plurality of second sub-transmission ports corresponding to the plurality of sub-signals in the set of to-be-displayed signals respectively, the plurality of first sub-transmission ports and the plurality of second sub-transmission ports each comprising at least one DP or eDP interface corresponding to at least one of the sub-signals transmitted in the DP or eDP protocol; the plurality of first sub-transmission ports of the at least one first customized connector being connected to the control system; at least one transmission line, the transmission line comprising a plurality of connection lines; the plurality of connection lines being connected to the second sub-transmission ports of the first customized connector adaptedly; at least one second customized connector, the second customized connector comprising a plurality of first sub-transmission ports and a plurality of second sub-transmission ports corresponding to the plurality of sub-signals in the set of to-be-displayed signals respectively, the plurality of first sub-transmission ports and the plurality of second sub-transmission ports each comprising at least one DP or eDP interface corresponding to at least one of the sub-signals transmitted in the DP or eDP protocol; the plurality of first sub-transmission ports of the second customized connector being connected to the connection lines adaptedly; at least one display system, the display system being connected to the plurality of second sub-transmission ports of the second customized connector, the display system being configured to receive the to-be-displayed signals and display under the control of the to-be-displayed signals; the to-be-displayed signals comprising a video sub-signal, a DP control sub-signal, an interrupt sub-signal, a control command sub-signal, a hot plug sub-signal, a backlight opening sub-signal, and a backlight brightness adjustment sub-signal; the plurality of first sub-transmission ports and the plurality of second sub-transmission ports of the first customized connector each comprising: the DP or eDP interface, the DP or eDP interface comprising at least one pair of video sub-signal transmission ports for transmitting the video sub-signal; a pair of DP control sub-signal transmission ports for transmitting the DP control sub-signal; a pair of control command sub-signal transmission ports for transmitting the control command sub-signal, the backlight opening sub-signal, and the backlight brightness adjustment sub-signal; a hot plug sub-signal transmission port for transmitting the hot plug sub-signal; an interrupt sub-signal transmission port for transmitting the interrupt sub-signal.

2. The automotive display driving system of claim 1, wherein, the plurality of sub-signals of the to-be-displayed signals comprising a video sub-signal, the video sub-signal being transmitted to the display system through the DP or eDP interface of the first customized connector and the DP or eDP interface of the second customized connector in the DP or eDP protocol.

3. The automotive display driving system of claim 1, wherein, The control system comprises a system chip connected with the plurality of first sub-transmission ports of the at least one first customized connector, and the system chip is configured to output the at least one set of to-be-displayed signals, and at least one of the sub-signals of the to-be-displayed signals is transmitted in the DP or eDP protocol.

4. The automotive display driving system of claim 1, wherein, The control system comprises a system chip and at least one first conversion chip, and the DP or eDP interfaces of the plurality of first sub-transmission ports of the first customized connector are connected with the system chip through the first conversion chip. The system chip is configured to output at least one set of initial to-be-displayed signals, and the initial to-be-displayed signals comprise a plurality of initial sub-signals, and at least one of the initial sub-signals is transmitted in an initial protocol; and the first conversion chip is configured to receive the initial sub-signals transmitted in the initial protocol and convert them into the sub-signals transmitted in the DP protocol.

5. The automotive display driving system of claim 1, wherein, The control system comprises a system chip and at least one first conversion chip, and in the case that the control system is configured to output a plurality of sets of to-be-displayed signals, the system chip comprises at least one set of first output ports and at least one set of second output ports, the DP or eDP interfaces of the plurality of first sub-transmission ports of the at least one first customized connector are connected with the at least one set of second output ports of the system chip through the first conversion chip respectively, and the at least one first customized connector is connected with the at least one set of first output ports of the system chip correspondingly. The system chip is configured to output a set of initial to-be-displayed signals through a set of the second output ports and output a set of to-be-displayed signals through a set of the first output ports; the initial to-be-displayed signals comprise a plurality of initial sub-signals, and at least one of the initial sub-signals is transmitted in an initial protocol; and the first conversion chip is configured to receive the initial sub-signals transmitted in the initial protocol and convert them into the sub-signals transmitted in the DP protocol.

6. The automotive display driving system according to any one of claims 1 to 5, characterized by, The display system comprises a first vehicle-mounted display device connected with the second customized connector, wherein the first vehicle-mounted display device is configured to drive display in the DP or eDP protocol.

7. The automotive display driving system according to any one of claims 1 to 5, characterized by, At least one of the display systems comprises a second vehicle-mounted display device and a second conversion chip, and the DP or eDP interfaces of the plurality of second sub-transmission ports of the second customized connector are connected with the second vehicle-mounted display device through the second conversion chip. The second conversion chip is configured to receive the sub-signals transmitted in the DP or eDP protocol and convert them into initial sub-signals transmitted in an initial protocol. The second vehicle-mounted display device is configured to drive display in the initial protocol.

8. The automotive display driving system according to any one of claims 1 to 5, characterized by, The DP or eDP interface comprises four pairs of video sub-signal transmission ports.

9. The automotive display driving system of claim 1, wherein, The plurality of connection lines of the transmission line are coaxial connection lines.

10. A signal transmission method of an automotive display driving system, applied in the automotive display driving system according to any one of claims 1-9, characterized in that, The control system outputs at least one set of to-be-displayed signals, and the to-be-displayed signals comprise a plurality of sub-signals, and at least one of the sub-signals is transmitted in a DP or eDP protocol. ​ The multiple sub-signals of the to-be-displayed signal output by the control system are transmitted in parallel to a display system through a first custom connector, a transmission line, and a second custom connector; The display system receives the to-be-displayed signal and displays under the driving of the to-be-displayed signal.

11. A driving method of a signal to be displayed, applied to the automobile display driving system according to any one of claims 1 to 9, characterized by, The to-be-displayed signal received by the display system includes a video sub-signal, an interrupt sub-signal, and a control command sub-signal, and the display system also receives a power-on signal; The working level of the power-on signal is in a first time period, the working level of the interrupt sub-signal is in the first time period, the working level of the video sub-signal is in the first time period, and the working level of the control command sub-signal is in the first time period.

12. The driving method of a display signal according to claim 11, wherein The to-be-displayed signal further includes a backlight-on sub-signal and a backlight brightness adjustment sub-signal; The working level of the backlight brightness adjustment sub-signal is in a second time period, and the working level of the backlight-on sub-signal is in the second time period; The second time period is contained in the first time period.

13. A vehicle characterized by comprising: The automobile display driving system includes any one of the automobile display driving systems in claims 1-9.

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