A digital instrument panel control board card

Abstract

The utility model discloses a kind of digital instrument screen control board card, it is related to control board card technical field, including: power supply circuit, communication circuit, MCU circuit and nixie tube driving circuit, and power supply circuit is sequentially connected with communication circuit, MCU circuit and nixie tube driving circuit;Power supply circuit is used to convert the voltage required by the chip set on control board card for the power supply provided by outside;Communication circuit is used to exchange between the external information between control board card and external module;MCU circuit is used to carry out information processing to the external information received by communication circuit;Nixie tube driving circuit is used to receive the information transmitted by MCU circuit, and drive nixie tube display.The utility model solves the problem that when there are three nixie tube driving chips in series in the existing digital instrument screen control board card, the third group of nixie tube of digital instrument screen will display the signal transmitted by the first nixie tube driving temporarily.

Description

Technical Field

[0001] This utility model relates to the field of control board technology, and more specifically, to a digital instrument panel control board. Background Technology

[0002] In many fields such as industrial control, automotive electronics, and intelligent instruments, digital instrument panels are key components for information display, and their display quality and stability are crucial for users to obtain accurate information. The digital instrument panel control board, as the core control unit of the digital instrument panel, is responsible for driving display elements such as digital tubes, presenting various data to users in an intuitive digital format.

[0003] Existing digital instrument panel control boards are based on circuits using serially connected digital tube driver chips. One digital tube driver chip drives a corresponding group of digital tubes. When three digital tube driver chips are connected in series, the third group of digital tubes on the digital instrument panel will briefly display the signal transmitted by the first digital tube driver, which can cause confusion for users.

[0004] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0005] In view of the problems in the related technologies, this utility model proposes a digital instrument panel control board to overcome the above-mentioned technical problems existing in the existing related technologies.

[0006] Therefore, the specific technical solution adopted by this utility model is as follows:

[0007] A digital instrument panel control board includes: a power supply circuit, a communication circuit, an MCU circuit, and a digital tube driving circuit, wherein the power supply circuit is connected to the communication circuit, the MCU circuit, and the digital tube driving circuit in sequence.

[0008] The power supply circuit is used to convert the externally supplied power into the voltage required by the chipset on the control board.

[0009] Communication circuitry is used to exchange external information between the control board and external modules.

[0010] MCU circuits are used to process external information received by communication circuits.

[0011] The digital tube driver circuit is used to receive information transmitted by the MCU circuit and drive the digital tube to display the information.

[0012] Furthermore, the power supply circuit includes: a power connection module, a step-down module, a first filter module, a linear regulator module, and a second filter module, and the power connection module, the step-down module, and the linear regulator module are connected in sequence, the first filter module is connected to the step-down module, and the second filter module is connected to the linear regulator module.

[0013] A power connection module for connecting to an externally supplied power source;

[0014] A step-down module is used to step down the external power supply to obtain a 5V voltage;

[0015] The first filtering module is used to filter the obtained 5V voltage.

[0016] A linear voltage regulator module is used to convert the obtained 5V voltage to 3V voltage;

[0017] The second filtering module is used to filter the obtained 3V voltage.

[0018] Furthermore, the power connection module includes a connector J1 and a capacitor C1, wherein the first interface of the connector J1 is connected to one end of the capacitor C1 and connected to 24V, and the fourth interface of the connector J1 is connected to the other end of the capacitor C1 and connected to 24VGND.

[0019] Furthermore, the first filtering module includes a capacitor C2, with one end of the capacitor C2 connected to the output terminal of the step-down module and the other end of the capacitor C2 grounded.

[0020] Furthermore, the linear voltage regulator module includes: chip U3, photodiode D1, inductor R2, capacitor C3, capacitor C4 and capacitor C11;

[0021] Among them, the first pin of chip U3 is connected to one end of capacitor C3, one end of capacitor C4 and one end of photodiode D1 in sequence and grounded. The other end of photodiode D1 is connected to one end of inductor R2. The other end of inductor R2 is connected to the other end of capacitor C3, the other end of capacitor C4 and the second pin of chip U3 and connected to 3.3V.

[0022] The third pin of chip U3 is connected to one end of capacitor C11 and connected to 5V, while the other end of capacitor C11 is grounded.

[0023] Furthermore, the second filtering module includes: capacitors C5, C6, C7, C8, C9 and C10;

[0024] One end of capacitor C10 is connected to one end of capacitor C5, one end of capacitor C6, one end of capacitor C7, one end of capacitor C8 and one end of capacitor C9 in sequence and connected to 3.3V. The other end of capacitor C10 is connected to the other end of capacitor C5, the other end of capacitor C6, the other end of capacitor C7, the other end of capacitor C8 and the other end of capacitor C9 in sequence and grounded.

[0025] Furthermore, the communication circuit includes chip U2 and resistor R1;

[0026] In this circuit, the sixth pin of chip U2 is connected to one end of resistor R1, and the other end of resistor R1 is connected to the seventh pin of chip U2.

[0027] Furthermore, the MCU circuit includes: chip U1, resistor R3, and capacitor C12;

[0028] The seventh pin of chip U1 is connected to one end of resistor R3 and connected to 3.3V. The other end of resistor R3 is connected to one end of capacitor C12, and the other end of capacitor C12 is grounded.

[0029] Furthermore, the digital tube driving circuit includes: chip U4, chip U5, chip U6, connector J3, connector J4, connector P4, resistor R4, capacitor C13, resistor R5, capacitor C14, resistor R6, capacitor C15, inductor R7, inductor R8, resistor R10, and resistor R11.

[0030] Among them, the eighteenth pin of chip U4 is connected to one end of resistor R4, the other end of resistor R4 is connected to one end of capacitor C13 and the nineteenth pin of chip U4 and connected to 5V, and the other end of capacitor C13 is grounded.

[0031] The eighteenth pin of chip U5 is connected to one end of resistor R5, the other end of resistor R5 is connected to one end of capacitor C14 and the nineteenth pin of chip U5 and connected to 5V, and the other end of capacitor C14 is grounded.

[0032] The eighteenth pin of chip U6 is connected to one end of resistor R6, the other end of resistor R6 is connected to one end of capacitor C15 and the nineteenth pin of chip U6 and connected to 5V, and the other end of capacitor C15 is grounded.

[0033] The first pin of connector J3 is connected to 3.3V, the second pin of connector J3 is connected to one end of inductor R7, the third pin of connector J3 is grounded, and the fourth pin of connector J3 is connected to one end of inductor R8.

[0034] The sixth pin of connector P4 is connected to one end of resistor R11, and the other end of resistor R11 is grounded. The fifth pin of connector P4 is connected to one end of resistor R10, and the other end of resistor R10 is grounded.

[0035] The beneficial effects of this utility model are as follows:

[0036] This invention uses a parallel connection of digital tube driver chips and utilizes an MCU chip to directly transmit the decoded information to a specific digital tube driver that needs to work, unlike the series connection method where all digital tube driver chips need to work. It enables the board design to be completed based on the parallel connection of digital tube driver chips, and solves the problem that when there are three digital tube driver chips connected in series in the existing digital instrument control board, the third group of digital tubes on the digital instrument screen will briefly display the signal transmitted by the first digital tube driver. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of a digital instrument panel control board according to an embodiment of the present utility model;

[0039] Figure 2 This is a circuit diagram of a power connection module in a digital instrument panel control board according to an embodiment of the present utility model;

[0040] Figure 3 This is a circuit diagram of a step-down module in a digital instrument panel control board according to an embodiment of the present utility model;

[0041] Figure 4 This is a circuit diagram of a linear voltage regulator module in a digital instrument panel control board according to an embodiment of the present utility model;

[0042] Figure 5 This is a circuit diagram of the first filtering module in a digital instrument panel control board according to an embodiment of the present utility model;

[0043] Figure 6 This is a circuit diagram of the second filter module in a digital instrument panel control board according to an embodiment of the present utility model;

[0044] Figure 7 This is a circuit diagram of chip U2 in the communication circuit of a digital instrument panel control board according to an embodiment of the present invention;

[0045] Figure 8 This is a circuit diagram of connector J2 in the communication circuit of a digital instrument panel control board according to an embodiment of the present invention;

[0046] Figure 9 This is a circuit diagram of the MCU circuit in a digital instrument panel control board according to an embodiment of the present utility model;

[0047] Figure 10 This is a circuit diagram of chip U4 in the digital tube driving circuit of a digital instrument panel control board according to an embodiment of the present utility model;

[0048] Figure 11 This is a circuit diagram of chip U5 in the digital tube driving circuit of a digital instrument panel control board according to an embodiment of the present utility model;

[0049] Figure 12 This is a circuit diagram of chip U6 in the digital tube driving circuit of a digital instrument panel control board according to an embodiment of the present utility model;

[0050] Figure 13 This is a circuit diagram of connector J4 in the digital tube driving circuit of a digital instrument panel control board according to an embodiment of the present utility model;

[0051] Figure 14 This is a circuit diagram of connector J3 in the digital tube driving circuit of a digital instrument panel control board according to an embodiment of the present utility model;

[0052] Figure 15 This is a circuit diagram of connector P4 in the digital tube driving circuit of a digital instrument panel control board according to an embodiment of the present utility model.

[0053] Figure 16 This is an electrical connection diagram of a digital instrument panel control board according to an embodiment of the present utility model.

[0054] In the picture:

[0055] 1. Power supply circuit; 101. Power connection module; 102. Step-down module; 103. First filter module; 104. Linear regulator module; 105. Second filter module; 2. Communication circuit; 3. MCU circuit; 4. Digital tube driver circuit. Detailed Implementation

[0056] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0057] According to an embodiment of the present invention, a digital instrument panel control board is provided.

[0058] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figure 1-15As shown, the digital instrument panel control board according to an embodiment of the present utility model includes: a power supply circuit 1, a communication circuit 2, an MCU circuit 3, and a digital tube driving circuit 4, and the power supply circuit 1 is connected to the communication circuit 2, the MCU circuit 3, and the digital tube driving circuit 4 in sequence.

[0059] Power supply circuit 1 is used to convert the externally supplied power into the voltage required by the chipset on the control board.

[0060] It should be noted that the control board requires an external DC_24V power supply. However, the MCU chip on this control board requires a DC_3.3V power supply; the digital tube driver chip requires a DC_5V power supply, and input and output ground isolation is not required; a DC-DC step-down module is used to convert DC_24V to DC_5V, and an LDO linear regulator is used to convert DC_5V to DC_3.3V.

[0061] The control board chipset includes chips U1, U2, U3, U4, U5, U6, and U7.

[0062] Communication circuit 2 is used to exchange external information between the control board and external modules; it mainly receives information from external modules that needs to be displayed on the digital instrument panel.

[0063] Among them, communication circuit 2 is the input port of the control board, which supports RS485 communication.

[0064] MCU circuit 3 is used to process the external information received by communication circuit 2 and transmit the processed information to the digital tube driver chip that needs to work.

[0065] Among them, the MCU circuit 3 is the core of the entire control board. It processes the external information received by the communication circuit 2 and then transmits the processed information to the digital tube driver chips that need to work, including chip U4, chip U5 and chip U6.

[0066] Digital tube driver circuit 4 is used to receive information transmitted by the MCU circuit and drive the digital tube to display.

[0067] Among them, the digital tube driver circuit 4 is the driver circuit for the digital tube, which executes the signal output by the MCU circuit 3 to drive the corresponding digital tube display.

[0068] In one embodiment, the power supply circuit 1 includes: a power connection module 101, a step-down module 102, a first filter module 103, a linear regulator module 104, and a second filter module 105, and the power connection module 101, the step-down module 102, and the linear regulator module 103 are connected in sequence, the first filter module 103 is connected to the step-down module 102, and the second filter module 105 is connected to the linear regulator module 103.

[0069] The power connection module 101 is used to connect to an externally supplied power source;

[0070] The step-down module 102 is used to step down the externally supplied power supply to obtain a 5V voltage;

[0071] The first filtering module 103 is used to filter the obtained 5V voltage;

[0072] Linear regulator module 104 is used to convert the obtained 5V voltage to 3V voltage; linear regulator module 104 is an LDO linear regulator.

[0073] The second filtering module 105 is used to filter the obtained 3V voltage.

[0074] In one embodiment, the power connection module 101 includes a connector J1 and a capacitor C1, wherein the first interface of the connector J1 is connected to one end of the capacitor C1 and connected to 24V, and the fourth interface of the connector J1 is connected to the other end of the capacitor C1 and connected to 24VGND.

[0075] In one embodiment, the first filtering module 103 includes a capacitor C2, one end of which is connected to the output terminal of the step-down module 102, and the other end of which is grounded.

[0076] In one embodiment, the linear regulator module 104 includes: chip U3, photodiode D1, inductor R2, capacitor C3, capacitor C4 and capacitor C11;

[0077] Among them, the first pin of chip U3 is connected to one end of capacitor C3, one end of capacitor C4 and one end of photodiode D1 in sequence and grounded. The other end of photodiode D1 is connected to one end of inductor R2. The other end of inductor R2 is connected to the other end of capacitor C3, the other end of capacitor C4 and the second pin of chip U3 and connected to 3.3V.

[0078] The third pin of chip U3 is connected to one end of capacitor C11 and connected to 5V, while the other end of capacitor C11 is grounded.

[0079] In one embodiment, the second filtering module 105 includes: capacitor C5, capacitor C6, capacitor C7, capacitor C8, capacitor C9 and capacitor C10.

[0080] One end of capacitor C10 is connected to one end of capacitor C5, one end of capacitor C6, one end of capacitor C7, one end of capacitor C8 and one end of capacitor C9 in sequence and connected to 3.3V. The other end of capacitor C10 is connected to the other end of capacitor C5, the other end of capacitor C6, the other end of capacitor C7, the other end of capacitor C8 and the other end of capacitor C9 in sequence and grounded.

[0081] In one embodiment, the communication circuit 2 includes a chip U2 and a resistor R1;

[0082] In this circuit, the sixth pin of chip U2 is connected to one end of resistor R1, and the other end of resistor R1 is connected to the seventh pin of chip U2.

[0083] In addition, in specific applications, the above-mentioned communication circuit 2 also includes a connector J2, wherein the first pin of connector J2 is used to connect to RS485_A, the second pin of connector J2 is used to connect to RS485_B, and the third pin of connector J2 is used to ground.

[0084] In one embodiment, the MCU circuit 3 includes: chip U1, resistor R3 and capacitor C12;

[0085] The seventh pin of chip U1 is connected to one end of resistor R3 and connected to 3.3V. The other end of resistor R3 is connected to one end of capacitor C12, and the other end of capacitor C12 is grounded.

[0086] In one embodiment, the digital tube driving circuit 4 includes: chip U4, chip U5, chip U6, connector J3, connector J4, connector P4, resistor R4, capacitor C13, resistor R5, capacitor C14, resistor R6, capacitor C15, inductor R7, inductor R8, resistor R10, and resistor R11.

[0087] Among them, the eighteenth pin of chip U4 is connected to one end of resistor R4, the other end of resistor R4 is connected to one end of capacitor C13 and the nineteenth pin of chip U4 and connected to 5V, and the other end of capacitor C13 is grounded.

[0088] The eighteenth pin of chip U5 is connected to one end of resistor R5, the other end of resistor R5 is connected to one end of capacitor C14 and the nineteenth pin of chip U5 and connected to 5V, and the other end of capacitor C14 is grounded.

[0089] The eighteenth pin of chip U6 is connected to one end of resistor R6, the other end of resistor R6 is connected to one end of capacitor C15 and the nineteenth pin of chip U6 and connected to 5V, and the other end of capacitor C15 is grounded.

[0090] The first pin of connector J3 is connected to 3.3V, the second pin of connector J3 is connected to one end of inductor R7, the third pin of connector J3 is grounded, and the fourth pin of connector J3 is connected to one end of inductor R8.

[0091] The sixth pin of connector P4 is connected to one end of resistor R11, and the other end of resistor R11 is grounded. The fifth pin of connector P4 is connected to one end of resistor R10, and the other end of resistor R10 is grounded.

[0092] To facilitate understanding of the above-mentioned technical solutions of this utility model, the working principle or operation method of this utility model in actual process will be described in detail below.

[0093] like Figure 16 As shown, in practical applications, this utility model utilizes a power supply circuit 1 connected to an external power source to provide DC_24V power. Then, a step-down module 102 reduces the voltage to DC_5V, and an LDO linear regulator converts DC_5V to DC_3.3V, which can then power other circuits. The communication circuit 2 receives external information and transmits it to the MCU circuit 3 for information processing. The processed information is then transmitted to the digital tube driver chip that needs to work. Finally, the digital tube driver circuit 4 executes the signal output by the MCU circuit 3 to drive the corresponding digital tube display.

[0094] In summary, by utilizing the above-mentioned technical solution of this utility model, this utility model adopts a parallel connection of digital tube driver chips and uses an MCU chip to directly transmit the decoded information to a specific digital tube driver that needs to work, unlike the series connection method where all digital tube driver chips need to work. This allows for the completion of the board design based on parallel digital tube driver chips, and solves the problem that when three digital tube driver chips are connected in series in existing digital instrument control boards, the third group of digital tubes on the digital instrument screen will briefly display the signal transmitted by the first digital tube driver.

[0095] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0096] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A digital instrument panel control board, characterized in that, include: The system includes a power supply circuit, a communication circuit, an MCU circuit, and a digital tube driver circuit, wherein the power supply circuit is sequentially connected to the communication circuit, the MCU circuit, and the digital tube driver circuit. The power supply circuit is used to convert the externally supplied power into the voltage required by the chipset on the control board; The communication circuit is used to exchange external information between the control board and external modules; The MCU circuit is used to process external information received by the communication circuit. The digital tube driver circuit is used to receive information transmitted by the MCU circuit and drive the digital tube to display.

2. The digital instrument panel control board according to claim 1, characterized in that, The power supply circuit includes: a power connection module, a step-down module, a first filter module, a linear regulator module, and a second filter module, wherein the power connection module, the step-down module, and the linear regulator module are connected in sequence, the first filter module is connected to the step-down module, and the second filter module is connected to the linear regulator module. The power connection module is used to connect to an externally supplied power source; The step-down module is used to step down the externally supplied power supply to obtain a 5V voltage; The first filtering module is used to filter the obtained 5V voltage. The linear voltage regulator module is used to convert the obtained 5V voltage into 3V voltage; The second filtering module is used to filter the obtained 3V voltage.

3. The digital instrument panel control board according to claim 2, characterized in that, The power connection module includes a connector J1 and a capacitor C1, wherein the first interface of the connector J1 is connected to one end of the capacitor C1 and connected to 24V, and the fourth interface of the connector J1 is connected to the other end of the capacitor C1 and connected to 24VGND.

4. A digital instrument panel control board according to claim 2, characterized in that, The first filtering module includes a capacitor C2, one end of which is connected to the output terminal of the step-down module, and the other end of which is grounded.

5. A digital instrument panel control board according to claim 2, characterized in that, The linear voltage regulator module includes: chip U3, photodiode D1, inductor R2, capacitor C3, capacitor C4 and capacitor C11; Wherein, the first pin of the chip U3 is connected to one end of the capacitor C3, one end of the capacitor C4 and one end of the photodiode D1 in sequence and grounded; the other end of the photodiode D1 is connected to one end of the inductor R2; the other end of the inductor R2 is connected to the other end of the capacitor C3, the other end of the capacitor C4 and the second pin of the chip U3 and connected to 3.3V. The third pin of the chip U3 is connected to one end of the capacitor C11 and connected to 5V, while the other end of the capacitor C11 is grounded.

6. A digital instrument panel control board according to claim 2, characterized in that, The second filtering module includes: capacitor C5, capacitor C6, capacitor C7, capacitor C8, capacitor C9 and capacitor C10; One end of capacitor C10 is connected to one end of capacitor C5, one end of capacitor C6, one end of capacitor C7, one end of capacitor C8, and one end of capacitor C9 in sequence and is connected to 3.3V. The other end of capacitor C10 is connected to the other end of capacitor C5, the other end of capacitor C6, the other end of capacitor C7, the other end of capacitor C8, and the other end of capacitor C9 in sequence and is grounded.

7. A digital instrument panel control board according to claim 1, characterized in that, The communication circuit includes chip U2 and resistor R1; The sixth pin of the chip U2 is connected to one end of the resistor R1, and the other end of the resistor R1 is connected to the seventh pin of the chip U2.

8. A digital instrument panel control board according to claim 1, characterized in that, The MCU circuit includes: chip U1, resistor R3 and capacitor C12; The seventh pin of the chip U1 is connected to one end of the resistor R3 and is connected to 3.3V. The other end of the resistor R3 is connected to one end of the capacitor C12, and the other end of the capacitor C12 is grounded.

9. A digital instrument panel control board according to claim 1, characterized in that, The digital tube driving circuit includes: chip U4, chip U5, chip U6, connector J3, connector J4, connector P4, resistor R4, capacitor C13, resistor R5, capacitor C14, resistor R6, capacitor C15, inductor R7, inductor R8, resistor R10, and resistor R11. Wherein, the eighteenth pin of the chip U4 is connected to one end of the resistor R4, the other end of the resistor R4 is connected to one end of the capacitor C13 and the nineteenth pin of the chip U4 and is connected to 5V, and the other end of the capacitor C13 is grounded; The eighteenth pin of the chip U5 is connected to one end of the resistor R5, the other end of the resistor R5 is connected to one end of the capacitor C14 and the nineteenth pin of the chip U5 and connected to 5V, and the other end of the capacitor C14 is grounded. The eighteenth pin of the chip U6 is connected to one end of the resistor R6, the other end of the resistor R6 is connected to one end of the capacitor C15 and the nineteenth pin of the chip U6 and connected to 5V, and the other end of the capacitor C15 is grounded. The first pin of connector J3 is connected to 3.3V, the second pin of connector J3 is connected to one end of inductor R7, the third pin of connector J3 is grounded, and the fourth pin of connector J3 is connected to one end of inductor R8. The sixth pin of connector P4 is connected to one end of resistor R11, and the other end of resistor R11 is grounded. The fifth pin of connector P4 is connected to one end of resistor R10, and the other end of resistor R10 is grounded.

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