Dot matrix screen system and automobile

Abstract

The utility model belongs to the field of automobile LED lamp control, and particularly relates to a lattice screen system and an automobile. A plurality of two-stage lamp panel frameworks; the two-stage lamp panel architecture comprises a first-stage lamp panel, a second-stage lamp panel, a third-stage lamp panel, a fourth-stage lamp panel, a fifth-stage lamp panel and a sixth-stage lamp panel, the second-stage lamp panel is electrically connected with the first LVDS transmission module of the first-stage lamp panel through a second LVDS transmission module; wherein the first-stage lamp panel and the second-stage lamp panel are hard PCBs (Printed Circuit Board). The main control board is connected with the first-stage lamp board through the CAN-FD bus, the second-stage lamp board is in cascade connection with the first-stage lamp board through the LVDS, a large-area lamp board in the related technology is divided into two small lamp boards, the second-stage lamp board is in cascade connection through the LVDS, the second-stage lamp board does not need to be independently connected with the main control board, the number of wire harnesses is further reduced, and meanwhile the number of the divided two-stage lamp boards is reduced. And the structure of the curved-surface automobile lamp is better fitted, and the mounting stability is improved.

Description

Technical Field

[0001] This utility model belongs to the field of automotive LED lighting control, specifically relating to a dot matrix screen system and an automobile. Background Technology

[0002] With the development of automotive intelligence, automotive vision systems are empowering the fashion, trendiness, and personalization of car appearance. The visual effects of automotive lighting displays are becoming increasingly complex, and users' demand for cooler and more personalized visuals is rapidly driving the development of automotive dot matrix screen systems.

[0003] The architecture of the dot matrix display system in related technologies is as follows: the main MCU of the main control board is directly connected to each lamp board through an internal bus. The lamp board is a large-area rigid or flexible board, and each lamp board is controlled by a slave MCU. During use, it was found that the lamp board installation could not conform to the curved shape of the lamp fixture, resulting in poor stability after installation. Furthermore, the wiring harnesses between the main control board and each lamp board are arranged in a star pattern, increasing the difficulty of designing the internal structure of the lamp fixture.

[0004] The wiring harnesses from the main controller to each lamp board are arranged in a star shape, which increases the difficulty of the internal structure design of the lamp. Using rigid lamp boards makes it difficult to fit the curved shape of the lamp due to their large area, while using flexible lamp boards increases the assembly difficulty and reduces reliability.

[0005] Therefore, how to improve the installation stability of the lamp boards while reducing the number of wiring harnesses between the main control board and each lamp board is a technical problem that urgently needs to be solved.

[0006] It should be noted that the information disclosed in this background section is only for understanding the background technology of the present application concept, and therefore, the above description is not considered to constitute prior art information. Utility Model Content

[0007] This disclosure provides at least one dot matrix screen system and one automobile.

[0008] In a first aspect, embodiments of this disclosure provide a dot matrix screen system, including:

[0009] Main control board;

[0010] Multiple two-level lamp board architectures are provided, each of which is electrically connected to the main control board.

[0011] The two-level lamp board architecture includes:

[0012] The first-level lamp board is electrically connected to the main MCU control module of the main control board via the CAN-FD bus from the MCU control module.

[0013] The second-level lamp board is electrically connected to the first LVDS transmission module of the first-level lamp board through the second LVDS transmission module.

[0014] The first-level lamp board and the second-level lamp board are rigid PCB boards.

[0015] In one optional implementation, the main control board further includes:

[0016] A lighting effect storage module is electrically connected to the main MCU control module and is used to store dynamic lighting effects;

[0017] A receiving module, which is electrically connected to the main MCU control module, and is used to receive vehicle body commands;

[0018] The first communication module is electrically connected to the main MCU control module and electrically connected to the first-level lamp board via the CAN-FD bus.

[0019] In one optional embodiment, the first-stage lamp panel further includes:

[0020] The second communication module is electrically connected to the slave MCU control module and electrically connected to the master MCU control module of the main control board via the CAN-FD bus;

[0021] A communication conversion module, which is electrically connected to the MCU control module, and is used to convert the SPI signal from the MCU control module into a single-ended signal;

[0022] The first LED driver display module is electrically connected to the communication conversion module and is used to drive the LED display based on the received single-ended signal.

[0023] In one optional embodiment, the second-stage lamp panel further includes:

[0024] The second LED driver display module is electrically connected to the second LVDS transmission module and is used to receive single-ended signals from the LVDS transmission module to drive the LED display.

[0025] In one optional implementation, the first LVDS transmission module is electrically connected to both the first LED driver display module and the communication conversion module.

[0026] Furthermore, the first LVDS transmission module is used to convert single-ended signals into differential signal pairs and transmit them to the second LVDS transmission module;

[0027] The second LVDS transmission module is used to convert the received differential signal pairs into single-ended signals.

[0028] In one alternative implementation, the first LVDS transmission module and the second LVDS transmission module are connected via twisted pair or ribbon cable.

[0029] Secondly, embodiments of this disclosure also provide a dot matrix screen system, including:

[0030] The main MCU control module is located on the main control board;

[0031] Multiple slave MCU control modules are electrically connected to the master MCU control module, and each slave MCU control module is set on the corresponding first-level lamp board;

[0032] The first-stage lamp board also includes a first LED driver display module, which is electrically connected to the MCU control module;

[0033] The second LED driver display module is mounted on the second-level lamp board and is electrically connected to the second LVDS transmission module of the second-level lamp board;

[0034] The second LVDS transmission module of the second-level lamp board is electrically connected to the first LVDS transmission module of the first-level lamp board.

[0035] In one optional implementation, the main control board further includes:

[0036] A lighting effect storage module is electrically connected to the main MCU control module and is used to store dynamic lighting effects;

[0037] A receiving module, which is electrically connected to the main MCU control module, and is used to receive vehicle body commands;

[0038] The first communication module is electrically connected to the main MCU control module and electrically connected to the first-level lamp board via a CAN-FD bus;

[0039] A front-end protection unit, which is electrically connected to the main MCU control module;

[0040] The power module is used to provide a constant voltage to the first-stage lamp board and the second-stage lamp board.

[0041] In one optional embodiment, the first-stage lamp panel further includes:

[0042] The second communication module is electrically connected to the slave MCU control module and electrically connected to the master MCU control module of the main control board via the CAN-FD bus;

[0043] A communication conversion module, which is electrically connected to the MCU control module, is used to convert the SPI signal from the MCU control module into a single-ended signal.

[0044] Thirdly, embodiments of this disclosure also provide an automobile, including an automobile body and a dot matrix screen system as described above.

[0045] The beneficial effects of this utility model are that the dot matrix screen system and the main control board of the car are connected to the first-level lamp board through the CAN-FD bus, and the second-level lamp board is cascaded with the first-level lamp board through LVDS. This divides the large-area lamp board in related technologies into two small lamp boards. By cascading the second-level lamp board through LVDS, there is no need to connect the second-level lamp board separately to the main control board, which further reduces the number of wiring harnesses. At the same time, the two-level lamp boards after division are more in line with the structure of curved car lights, improving installation stability.

[0046] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description and the accompanying drawings.

[0047] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0048] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in 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 utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0049] Figure 1 This is a schematic block diagram of a dot matrix screen system provided in an embodiment of the present disclosure;

[0050] Figure 2 A circuit diagram of the main MCU control module provided in an embodiment of this disclosure;

[0051] Figure 3 A circuit diagram of a lighting effect storage module provided in an embodiment of this disclosure;

[0052] Figure 4 A circuit diagram of the first communication module provided in an embodiment of this disclosure;

[0053] Figure 5 Circuit diagram of the front-end protection module provided in the embodiments of this disclosure;

[0054] Figure 6 A power module circuit diagram provided for an embodiment of this disclosure;

[0055] Figure 7 A circuit diagram of the MCU control module provided for embodiments of this disclosure;

[0056] Figure 8 A circuit diagram of the second communication module provided in an embodiment of this disclosure;

[0057] Figure 9 A circuit diagram of a communication conversion module provided in an embodiment of this disclosure;

[0058] Figure 10 A circuit diagram of the first LVDS transmission module provided in an embodiment of this disclosure;

[0059] Figure 11 A circuit diagram of the second LVDS transmission module provided in an embodiment of this disclosure. Detailed Implementation

[0060] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0061] Research revealed that the architecture of the dot matrix screen system in related technologies involves the main control board's main MCU directly connecting to each LED board via an internal bus, with each LED board controlled by a slave MCU. This architecture presents the following problems:

[0062] First, the wiring harnesses from the main controller to each lamp board are arranged in a star shape, which increases the difficulty of the internal structure design of the lamps.

[0063] Secondly, rigid light panels, due to their large area, are difficult to fit the curved shape of the light fixture.

[0064] Third, using flexible circuit boards for the lamp panel increases the difficulty of assembly and results in poor installation stability.

[0065] Based on the above research, this disclosure provides a dot matrix screen system and an automobile. By dividing a large-area light panel into two smaller light panels connected in series, the fit to the curvature of the light fixture is improved, and the installation stability is also enhanced. Moreover, the two smaller light panels after division use LVDS to transmit control commands, eliminating the need for an additional slave MCU and reducing the total amount of wiring harness.

[0066] The shortcomings of the above solutions are the result of the inventor's practical experience and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure should be considered as the inventor's contribution to this disclosure.

[0067] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0068] The following detailed description, with reference to the accompanying drawings, describes some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0069] Please see Figure 1 At least one embodiment provides a dot matrix screen system, including: a main control board; and multiple two-level lamp board architectures, each electrically connected to the main control board; wherein the two-level lamp board architecture includes: a first-level lamp board, which is electrically connected to the main MCU control module of the main control board via a CAN-FD bus from an MCU control module; and a second-level lamp board, which is electrically connected to the first LVDS transmission module of the first-level lamp board via a second LVDS transmission module, wherein the first-level lamp board and the second-level lamp board are rigid PCB boards.

[0070] The main control board is connected to the first-level lamp board via CAN-FD bus, and the second-level lamp board is cascaded with the first-level lamp board via LVDS. This divides the large-area lamp board in related technologies into two smaller lamp boards. By cascading the second-level lamp board via LVDS, there is no need to connect the second-level lamp board separately to the main control board, which further reduces the number of wiring harnesses. At the same time, the two-level lamp boards are more in line with the structure of curved car lights, improving installation stability.

[0071] Please continue reading. Figure 1 The main control board also includes:

[0072] The lighting effect storage module is electrically connected to the main MCU control module and is used to store dynamic lighting effects. Specifically, the circuit of the lighting effect storage module is as follows: Figure 3 As shown, it includes Flash chip U7, model number GD25B512MEY2GR. Flash chip U7 is connected to the main MCU control module via SPI and is used to store the lighting effect signals downloaded from the vehicle's CAN-FD bus. It can store dynamic lighting effects of 6000 LED dot matrix screens for up to 200 seconds.

[0073] The receiving module is electrically connected to the main MCU control module and is used to receive vehicle body commands.

[0074] Specifically, in a preferred embodiment, the receiving module is a CAN transceiver, model TJA1044T. The CAN-H and CAN-L interfaces of the CAN transceiver are connected to the vehicle's CAN bus network, and the RXD and TXD interfaces are electrically connected to the main MCU control module.

[0075] The first communication module is electrically connected to the main MCU control module and electrically connected to the first-level lamp board via the CAN-FD bus.

[0076] The front-end protection unit is electrically connected to the main MCU control module and is used to deal with interference when the vehicle body is powered, and to protect the downstream circuit from reverse connection operation and external ESD and signal interference.

[0077] The power module provides a constant voltage to the first-stage and second-stage LED panels, supplying the necessary power for the LED display.

[0078] The circuit diagram of the main MCU control module is as follows: Figure 2 As shown, it includes the main MCU chip U6, model number NXPFS32K146. The main MCU chip U6 receives the lighting signal from the CAN bus of the vehicle body through the receiving module, and transmits the dynamic lighting effect corresponding to the lighting signal to the slave MCU control module of the first-level lamp board through the internal CAN-FD.

[0079] The circuit diagram of the first communication module is as follows: Figure 4 As shown, the system includes a CAN transceiver chip U4, model number TITCAN1044AV. Pins 1 and 4 of chip U4 are connected to the main MCU chip U6. Pin 5 of chip U4 is an external 3.3V level conversion interface VIO, allowing chip U4 to directly adapt to the voltage of the main MCU chip U6 for communication. Chip U4 is connected to the CAN transceiver on the first-stage lamp board via an internal CAN-FD bus.

[0080] The circuit diagram of the front-end protection module is as follows: Figure 5 As shown, the system includes a TVS diode T1, filter capacitors C1-C4, a reverse-biased diode D1, and a reverse-biased PMOS transistor Q4. The positive terminal of the TVS diode T1 is connected to the vehicle body voltage level KL56. The drain terminal of the reverse-biased PMOS transistor Q4 is connected to the vehicle body voltage level KL56. A Zener diode D4 and a capacitor C115 are connected in series between the gate and source terminals of the reverse-biased PMOS transistor Q4 to protect it.

[0081] The circuit diagram of the power module is as follows: Figure 6As shown, the constant voltage BUCK chip U10, model MPQ4436A, supports a maximum output current of 6A, which can cover the particle current requirements of the first-stage and second-stage lamp boards. Inductor L8 and capacitors C103-C112 serve as input filters, while small-value capacitors C72, C73, C75, and C76 are used for output filters, resulting in a more stable power output and effectively suppressing electromagnetic compatibility noise radiated by the chip. Pin 14 of chip U10 is a fault feedback interface, connected to the main MCU chip U6 via a resistor divider network. It provides feedback of a low-level fault status when the main MCU chip U6's output voltage is abnormal. The output voltage can be set by adjusting the ratio of resistors R20 and R16. Preferably, the output voltage can be designed to be 4V to reduce the overall system's rated power consumption.

[0082] In some embodiments, the first-stage lamp panel further includes:

[0083] The second communication module is electrically connected to the slave MCU control module and electrically connected to the master MCU control module of the main control board via the CAN-FD bus.

[0084] A communication conversion module, which is electrically connected to the MCU control module, is used to convert the SPI signal from the MCU control module into a single-ended signal.

[0085] The first LED driver display module is electrically connected to the communication conversion module and is used to drive the LED display based on the received single-ended signal.

[0086] The circuit diagram of the MCU control module is as follows: Figure 7 As shown, the system includes the MCU chip U8, model number NXPS32K116, which is an M0 core MCU and contains one SPI communication interface for connection to the second communication module. Selecting an M0 core MCU as the slave MCU chip for the first-stage LED board maximizes the utilization of MCU resources and reduces the cost of a high-performance MCU.

[0087] The circuit diagram of the second communication module is as follows: Figure 8 As shown, its chip is the same as that of the first communication module, model TITCAN1044AV. It receives internal CAN-FD bus signals and transmits them to the slave MCU chip U8 via twisted pair.

[0088] The circuit diagram of the communication conversion module is as follows: Figure 9As shown, the system includes a conversion chip U3, model TI LP5899-Q1, which receives SPI signals from the MCU chip U8 and converts them into CCSI (Continuous Clock Serial Interface) for communication. CCSI includes SCLK, SIN, and SOUT. The SCLK clock signal is cascaded in a one-to-many star connection, with the output from conversion chip U3 connected to each LED driver chip within the LED driver display module. The SIN and SOUT data links are daisy-chained. The output from pin 8 of conversion chip U3 is sequentially connected in series with each LED driver chip before returning to pin 7 of conversion chip U3 to complete the transmission. A ferrite bead B2, resistor R24, and small-value capacitor C19 are added to pin 9 of conversion chip U3 to optimize the clock signal waveform and improve electromagnetic compatibility. MPZ1608S121ATDH55 is preferred for B2, and the resistor value of R24 is preferably in the range of 10R-100R. The capacitor value of C19 is preferably in the range of 2.2pF-100pF.

[0089] In some embodiments, the second-level lamp board further includes: a second LED driving display module, which is electrically connected to the second LVDS transmission module and is used to receive a single-ended signal from the LVDS transmission module to drive the LED display.

[0090] The first LVDS transmission module is electrically connected to the first LED driver display module and the communication conversion module, respectively; and the first LVDS transmission module is used to convert single-ended signals into differential signal pairs and transmit them to the second LVDS transmission module; the second LVDS transmission module is used to convert the received differential signal pairs into single-ended signals.

[0091] The first LVDS transmission module is as follows Figure 10 As shown, it includes:

[0092] The LVDS Driver chip U2 is model number TI DS90LV027AQ-Q1.

[0093] The LVDS Receiver chip U4 is model TI DS90LT012AQ-Q1;

[0094] The LVDS Driver chip U2 converts the single-ended SIN and SCLK signals into differential pairs of SIN_DIF+, SIN_DIF-, SCLK_DIF+, and SCLK_DIF-, which are then transmitted to the second-stage LED board using twisted-pair or stripline cables.

[0095] The LVDS Receiver chip U4 converts the SOUT_DIF+ and SOUT_DIF- differential pairs transmitted from the second-level LED board into SOUT.

[0096] The second LVDS transmission module is as follows Figure 11 As shown, including;

[0097] The LVDS Receiver chip U10 is model TI DS90LV028AQ-Q1.

[0098] The LVDS Driver chip U11 is model number TI DS90LV011AQ-Q1.

[0099] The LVDS Receiver chip U10 converts the SIN_DIF+, SIN_DIF-, SCLK_DIF+, and SCLK_DIF- differential pair signals transmitted from the first-level LED board into SIN and SCLK single-ended signals.

[0100] The LVDS Driver chip U11 converts the SOUT signal from the second LED driver display module into a differential pair of SOUT_DIF+ and SOUT_DIF- and sends it back to the first-stage lamp board. Ferrite beads B23 and B24 are placed on pins 6 and 7 of the LVDS Receiver chip U10 to reduce electromagnetic compatibility issues; B23 and B24 are preferably MPZ1608S121ATDH5.

[0101] In a preferred embodiment, the first LVDS transmission module and the second LVDS transmission module are connected via twisted pair or stripline cable.

[0102] Please see Figure 1 At least one embodiment also provides a dot matrix screen system, comprising: a main MCU control module disposed on a main control board; a plurality of slave MCU control modules electrically connected to the main MCU control module, each slave MCU control module being disposed on a corresponding first-level lamp board; the first-level lamp board further comprising a first LED driver display module electrically connected to the slave MCU control modules; a second LED driver display module disposed on a second-level lamp board and electrically connected to a second LVDS transmission module of the second-level lamp board; the second LVDS transmission module of the second-level lamp board being electrically connected to the first LVDS transmission module of the first-level lamp board.

[0103] The main control board is connected to the first-level lamp board via CAN-FD bus, and the second-level lamp board is cascaded with the first-level lamp board via LVDS. This divides the large-area lamp board in related technologies into two smaller lamp boards. By cascading the second-level lamp board via LVDS, there is no need for the second-level lamp board to be connected to the main control board separately, which further reduces the number of wiring harnesses. At the same time, the two-level lamp boards are more in line with the structure of curved car lights, improving installation stability.

[0104] In some embodiments, the main control board further includes:

[0105] The lighting effect storage module is electrically connected to the main MCU control module and is used to store dynamic lighting effects. Specifically, the circuit of the lighting effect storage module is as follows: Figure 3 As shown, it includes Flash chip U7, model number GD25B512MEY2GR. Flash chip U7 is connected to the main MCU control module via SPI and is used to store dynamic lighting effects downloaded from the vehicle's CAN-FD bus. It can store dynamic lighting effects of 6000 LED dot matrix screens for up to 200 seconds.

[0106] A receiving module, which is electrically connected to the main MCU control module, and is used to receive vehicle body commands;

[0107] The first communication module is electrically connected to the main MCU control module and electrically connected to the first-level lamp board via the CAN-FD bus.

[0108] The front-end protection module is electrically connected to the main MCU control module and is used to deal with interference when the vehicle body is powered, and to protect the downstream circuit from reverse connection operation and external ESD and signal interference.

[0109] The power module provides a constant voltage to the first-stage and second-stage lamp boards, providing the necessary power for image display.

[0110] The circuit diagram of the main MCU control module is as follows: Figure 2 As shown, it includes the main MCU chip U6, model number NXPFS32K146. The main MCU chip U6 receives the lighting signal from the CAN bus of the vehicle body through the receiving module, and transmits the lighting effect signal corresponding to the lighting signal to the slave MCU control module of the first-level lamp board through the internal CAN-FD.

[0111] The circuit diagram of the first communication module is as follows: Figure 4 As shown, the system includes a CAN transceiver chip U4, model number TITCAN1044AV. Pins 1 and 4 of chip U4 are connected to the main MCU chip U6. Pin 5 of chip U4 is a level conversion interface VIO with an external 3.3V supply, enabling chip U4 to directly adapt to the voltage of the main MCU chip U6 for communication. It is connected to the CAN transceiver on the first-stage lamp board via an internal CAN-FD bus.

[0112] The circuit diagram of the front-end protection module is as follows: Figure 5 As shown, the system includes a TVS diode T1, filter capacitors C1-C4, a reverse protection diode D1, and a reverse protection PMOS transistor Q4. The positive terminal of the TVS diode is connected to the vehicle body voltage level KL56. The drain terminal of the PMOS transistor Q4 is connected to the vehicle body voltage level KL56. A Zener diode D4 and a capacitor C115 are connected in series between the gate and source terminals of the PMOS transistor Q4 to protect it.

[0113] The circuit diagram of the power module is as follows: Figure 6 As shown, the constant voltage BUCK chip U10, model MPQ4436A, supports a maximum output current of 6A, which can cover the particle current requirements of the first-stage and second-stage lamp boards. Inductor L8 and capacitors C103-C112 serve as input filters, while small-value capacitors C72, C73, C75, and C76 are used for output filters, resulting in a more stable power output and effectively suppressing electromagnetic compatibility noise radiated by the chip. Pin 14 of chip U10 is a fault feedback interface, connected to the main MCU chip U6 via a resistor divider network. It provides feedback of a low-level fault status when the main MCU chip U6's output voltage is abnormal. The output voltage can be set by adjusting the ratio of resistors R20 and R16. Preferably, the output voltage can be designed to be 4V to reduce the overall system's rated power consumption.

[0114] In some embodiments, the first-stage lamp panel further includes:

[0115] The second communication module is electrically connected to the slave MCU control module and electrically connected to the master MCU control module of the main control board via the CAN-FD bus.

[0116] A communication conversion module, which is electrically connected to the MCU control module, is used to convert the SPI signal from the MCU control module into a single-ended signal.

[0117] The first LED driver display module is electrically connected to the communication conversion module and is used to drive the LED display based on the received single-ended signal.

[0118] The circuit diagram of the MCU control module is as follows: Figure 7 As shown, the system includes an MCU chip U8, model number NXPS32K116, which is an M0 core MCU and contains one SPI communication interface for connection to the second communication module. Selecting an M0 core MCU as the first-stage LED board slave MCU chip U8 maximizes the utilization of the MCU's resources and reduces the cost of a high-performance MCU.

[0119] The circuit diagram of the second communication module is as follows: Figure 8 As shown, its chip is the same as the chip of the first communication module, model TITCAN1044AV. It receives internal CAN-FD bus signals and transmits them to the slave MCU chip U8 through twisted pair.

[0120] The circuit diagram of the communication conversion module is as follows: Figure 9As shown, the system includes a conversion chip U3, model TI LP5899-Q1, which receives SPI signals from the MCU chip U8 and converts them into CCSI (Continuous Clock Serial Interface) for communication. CCSI includes SCLK, SIN, and SOUT. The SCLK clock signal is cascaded in a one-to-many star connection, with the output from conversion chip U3 connected to each LED driver chip within the LED driver display module. The SIN and SOUT data links are daisy-chained. The output from pin 8 of conversion chip U3 is sequentially connected in series with each LED driver chip before returning to pin 7 of conversion chip U3 to complete the transmission. A ferrite bead B2, resistor R24, and small-value capacitor C19 are added to pin 9 of conversion chip U3 to optimize the clock signal waveform and improve electromagnetic compatibility. MPZ1608S121ATDH55 is preferred for B2, and the resistor value of R24 is preferably in the range of 10R-100R. The capacitor value of C19 is preferably in the range of 2.2pF-100pF.

[0121] In some embodiments, the second-level lamp board further includes: a second LED driving display module, which is electrically connected to the second LVDS transmission module and is used to receive a single-ended signal from the LVDS transmission module to drive the LED display.

[0122] The first LVDS transmission module is electrically connected to the first LED driver display module and the communication conversion module, respectively; and the first LVDS transmission module is used to convert single-ended signals into differential signal pairs and transmit them to the second LVDS transmission module; the second LVDS transmission module is used to convert the received differential signal pairs into single-ended signals.

[0123] The first LVDS transmission module is as follows Figure 10 As shown, it includes:

[0124] The LVDS Driver chip U2 is model number TI DS90LV027AQ-Q1.

[0125] The LVDS Receiver chip U4 is model TI DS90LT012AQ-Q1;

[0126] The LVDS Driver chip U2 converts the single-ended SIN and SCLK signals into differential pairs of SIN_DIF+, SIN_DIF-, SCLK_DIF+, and SCLK_DIF-, which are then transmitted to the second-stage LED board using twisted-pair or stripline cables.

[0127] The LVDS Receiver chip U4 converts the SOUT_DIF+ and SOUT_DIF- differential pairs transmitted from the second-level LED board into SOUT.

[0128] The second LVDS transmission module is as follows Figure 11 As shown, including;

[0129] The LVDS Receiver chip U10 is model TI DS90LV028AQ-Q1.

[0130] The LVDS Driver chip U11 is model number TI DS90LV011AQ-Q1.

[0131] The LVDS Receiver chip U10 converts the SIN_DIF+, SIN_DIF-, SCLK_DIF+, and SCLK_DIF- differential pair signals transmitted from the first-level LED board into SIN and SCLK single-ended signals.

[0132] The LVDS Driver chip U11 converts the SOUT signal from the second LED driver display module into a differential pair of SOUT_DIF+ and SOUT_DIF- and sends it back to the first-stage lamp board. Ferrite beads B23 and B24 are placed on pins 6 and 7 of the LVDS Receiver chip U10 to reduce electromagnetic compatibility issues; B23 and B24 are preferably MPZ1608S121ATDH5.

[0133] In a preferred embodiment, the first LVDS transmission module and the second LVDS transmission module are connected via twisted pair or stripline cable.

[0134] At least one embodiment also provides an automobile, including an automobile body and a dot matrix screen system as described above.

[0135] In summary, this utility model provides a dot matrix screen system and an automobile. The dot matrix screen system includes: a main control board; and multiple two-level lamp board architectures, each electrically connected to the main control board. Each two-level lamp board architecture includes: a first-level lamp board, electrically connected to the main MCU control module of the main control board via a CAN-FD bus from an MCU control module; and a second-level lamp board, electrically connected to the first LVDS transmission module of the first-level lamp board via a second LVDS transmission module. Both the first-level and second-level lamp boards are rigid PCBs. The main control board connects to the first-level lamp board via a CAN-FD bus, and the second-level lamp board is cascaded with the first-level lamp board via LVDS. This divides the large-area lamp board in related technologies into two smaller lamp boards. By cascading the second-level lamp board via LVDS, it is unnecessary to connect the second-level lamp board separately to the main control board, further reducing the number of wiring harnesses. Furthermore, the divided two-level lamp boards better conform to the structure of curved automotive lights, improving installation stability.

[0136] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A dot matrix screen system, characterized in that, include: Main control board; Multiple two-level lamp board architectures are provided, each of which is electrically connected to the main control board. The two-level lamp board architecture includes: The first-level lamp board is electrically connected to the main MCU control module of the main control board via the CAN-FD bus from the MCU control module. The second-level lamp board is electrically connected to the first LVDS transmission module of the first-level lamp board through the second LVDS transmission module. The first-level lamp board and the second-level lamp board are rigid PCB boards.

2. The dot matrix screen system as described in claim 1, characterized in that, The main control board also includes: A lighting effect storage module is electrically connected to the main MCU control module and is used to store dynamic lighting effects; A receiving module, which is electrically connected to the main MCU control module, and is used to receive vehicle body commands; The first communication module is electrically connected to the main MCU control module and electrically connected to the first-level lamp board via the CAN-FD bus.

3. The dot matrix screen system as described in claim 1, characterized in that, The first-level light panel also includes: The second communication module is electrically connected to the slave MCU control module and electrically connected to the master MCU control module of the main control board via the CAN-FD bus; A communication conversion module, which is electrically connected to the MCU control module, and is used to convert the SPI signal from the MCU control module into a single-ended signal; The first LED driver display module is electrically connected to the communication conversion module and is used to drive the LED display based on the received single-ended signal.

4. The dot matrix screen system as described in claim 3, characterized in that, The second-level light panel also includes: The second LED driver display module is electrically connected to the second LVDS transmission module and is used to receive single-ended signals from the LVDS transmission module to drive the LED display.

5. The dot matrix screen system as described in claim 4, characterized in that, The first LVDS transmission module is electrically connected to both the first LED driver display module and the communication conversion module. Furthermore, the first LVDS transmission module is used to convert single-ended signals into differential signal pairs and transmit them to the second LVDS transmission module; The second LVDS transmission module is used to convert the received differential signal pairs into single-ended signals.

6. The dot matrix screen system as described in claim 1, characterized in that, The first LVDS transmission module is connected to the second LVDS transmission module via twisted pair or stripline cable.

7. A dot matrix screen system, characterized in that, include: The main MCU control module is located on the main control board; Multiple slave MCU control modules are electrically connected to the master MCU control module, and each slave MCU control module is set on the corresponding first-level lamp board; The first-stage lamp board also includes a first LED driver display module, which is electrically connected to the MCU control module; The second LED driver display module is mounted on the second-level lamp board and is electrically connected to the second LVDS transmission module of the second-level lamp board; The second LVDS transmission module of the second-level lamp board is electrically connected to the first LVDS transmission module of the first-level lamp board.

8. The dot matrix screen system as described in claim 7, characterized in that, The main control board also includes: A lighting effect storage module is electrically connected to the main MCU control module and is used to store dynamic lighting effects; A receiving module, which is electrically connected to the main MCU control module, and is used to receive vehicle body commands; The first communication module is electrically connected to the main MCU control module and electrically connected to the first-level lamp board via a CAN-FD bus; A front-end protection unit, which is electrically connected to the main MCU control module; The power module is used to provide a constant voltage to the first-stage lamp board and the second-stage lamp board.

9. The dot matrix screen system as described in claim 8, characterized in that, The first-level light panel also includes: The second communication module is electrically connected to the slave MCU control module and electrically connected to the master MCU control module of the main control board via the CAN-FD bus; A communication conversion module, which is electrically connected to the MCU control module, is used to convert the SPI signal from the MCU control module into a single-ended signal.

10. A car, characterized in that, Includes the vehicle body and the dot matrix screen system as described in any one of claims 1-9.

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