Motorcycle instrument nixie tube control display circuit and control method

Abstract

The invention discloses a motorcycle instrument nixie tube control display circuit and a control method, the motorcycle instrument nixie tube control display circuit comprises an acquisition module, an LED driving module, a power supply module and a communication module, the power supply module is used for supplying power to each component, and the communication module is used for connecting an MCU with a vehicle machine for communication. The acquisition signal output end of the acquisition module is connected with the acquisition signal input end of the MCU, and the photosensitive signal output end of the photosensitive circuit is connected with the photosensitive signal input end of the MCU; the signal input end of the LED driving module is connected with the driving signal output end of the MCU LED, and the driving output end of the LED driving module is connected with the driving input end of the LED display module. The LED display units can be uniformly driven through the LED driving module, and the LED lamps in the same LED display unit can be controlled through different control pins.

Description

Technical Field

[0001] The invention relates to the technical field of instrument equipment, and in particular to a motorcycle instrument digital tube control display circuit and a control method. Background Art

[0002] Digital tube is a common electronic display device, mainly used to display numbers, letters or simple symbols, and is widely used in various electronic devices. Digital tubes are usually composed of multiple light-emitting diodes (LEDs), which are controlled to light up or extinguish individually, so as to combine into different characters for display. Traditionally, they are designed in an analogy to the previous 1 / 2duty method of liquid crystal, and there are the following technical problems: 1. When multiple digital tubes are displayed at the same time, uneven brightness may occur, affecting the display effect; 2. In order to avoid flickering, the 1 / 2Duty design requires a higher refresh frequency; 3. The lighting time and order of each digital tube need to be precisely controlled, which puts higher requirements on the design and debugging of the hardware circuit. Therefore, a new digital tube control display circuit is urgently needed. Summary of the invention

[0003] The present invention aims to solve the technical problems existing in the prior art, and in particular innovatively proposes a motorcycle instrument digital tube control display circuit and a control method, which can uniformly drive each LED display unit through an LED driving module, and control the LED lights in the same LED display unit through different control pins.

[0004] In order to achieve the above-mentioned object, the present invention provides a motorcycle instrument digital tube control display circuit, including an acquisition module, an LED drive module, a power module and a communication module, wherein the power module is used to supply power to various components, and the communication module is used to connect the MCU with the vehicle computer for communication, the acquisition signal output end of the acquisition module is connected to the MCU acquisition signal input end, and the photosensitive signal output end of the photosensitive circuit is connected to the MCU photosensitive signal input end; the LED drive module signal input end is connected to the MCU LED drive signal output end, and the LED drive module drive output end is connected to the LED display module drive input end;

[0005] The LED driver module includes an LED driver chip U4, wherein the driving signal input end of the LED driver chip U4 is connected to the MCULED driving signal output end, the clock end of the LED driver chip U4 is connected to the MCULED driving clock end, the LED driver chip U4LE end is connected to the MCUPD06 / SEG34 end, the working voltage end of the LED driver chip U4 is connected to the SY_5V end of the power module, one end of the capacitor C27 and one end of the capacitor C28, the other end of the capacitor C27 and the other end of the capacitor C28 are both connected to the power ground, and the LED driver chip U4OE end is connected to the MCUPD07 / SEG33 end;

[0006] The communication signal output end of the LED driver chip U4 is connected to the driving signal input end of the LED driver chip U5, the clock end of the LED driver chip U5 is connected to the MCULED driving clock end, the LED driver chip U5LE end is connected to the MCUPD06 / SEG34 end, the working voltage end of the LED driver chip U5 is connected to the SY_5V end of the power module, one end of the capacitor C29 and one end of the capacitor C30, and the other end of the capacitor C29 and the other end of the capacitor C30 are both connected to the power ground;

[0007] The communication signal output end of the LED driver chip U5 is connected to the drive signal input end of the LED driver chip U6, the clock end of the LED driver chip U6 is connected to the MCULED drive clock end, the LED driver chip U6LE end is connected to the MCUPD06 / SEG34 end, the working voltage end of the LED driver chip U6 is connected to the SY_5V end of the power module, one end of the capacitor C31 and one end of the capacitor C32, and the other end of the capacitor C31 and the other end of the capacitor C32 are both connected to the power ground;

[0008] The LED display module includes a plurality of LED display units, and each driving output end of the LED driving chip U4, the LED driving chip U5, and the LED driving chip U6 is respectively connected to the driving input end of each LED display unit.

[0009] In the above scheme: the power module includes a positive electrode of a diode D6 connected to a positive electrode of a diode D1, one end of a capacitor C5, one end of a capacitor C6, one end of a capacitor C7, one end of a capacitor C8 and a power supply end of the vehicle machine ACC; a negative electrode of a diode D6 connected to a negative electrode of a diode D1, one end of an electrolytic capacitor EC1, one end of a capacitor C9, one end of a capacitor C10, one end of a capacitor C11, one end of a capacitor C12 and a Drain end of a DC-DC power chip; the other end of the capacitor C5, the other end of the capacitor C6, the other end of the capacitor C7, the other end of the capacitor C8, the other end of the electrolytic capacitor EC1, the other end of the capacitor C9, the other end of the capacitor C10, the other end of the capacitor C11 and the other end of the capacitor C12 are all connected to the power ground; the working voltage end of the DC-DC power chip is connected to one end of the capacitor C4; the other end of the capacitor C4 is connected to the ground end of the DC-DC power chip; the feedback end of the DC-DC power chip Connect one end of the resistor R3 and one end of the resistor R10, the other end of the resistor R10 is connected to the ground end of the DC-DC power supply chip, the other end of the resistor R3 is the SY_5V end of the power module, and outputs a 5V voltage. The other end of the resistor R3 is connected to one end of the inductor L1, one end of the electrolytic capacitor EC3, one end of the electrolytic capacitor EC4, one end of the electrolytic capacitor EC2 and one end of the resistor R13; one end of the inductor L1 is connected to the ground end of the DC-DC power supply chip, one end of the resistor R12 and one end of the Schottky diode D2, the other end of the inductor L1, the other end of the electrolytic capacitor EC3, the other end of the electrolytic capacitor EC4, the other end of the electrolytic capacitor EC2, the other end of the resistor R12, the other end of the resistor R13, and the other two ends of the Schottky diode D2 are all connected to the power ground, the CS end of the DC-DC power supply chip is connected to one end of the resistor R9, and the other end of the resistor R9 is connected to the ground end of the DC-DC power supply chip.

[0010] In the above scheme: the collection module includes a power collection circuit, a high beam collection circuit, a left turn collection circuit, and a right turn collection circuit.

[0011] The power collection circuit includes a resistor R76, one end of which is connected to the ACC power supply end of the vehicle machine and one end of the capacitor C56; the other end of the resistor R76 is connected to one end of the resistor R77 and one end of the resistor R78; the other end of the resistor R78 is connected to the MCU power supply power collection signal input end and the cathode of the voltage stabilizing diode ZD2; the other end of the resistor R77, the other end of the capacitor C56 and the anode of the voltage stabilizing diode ZD2 are all connected to the power ground;

[0012] The high beam collection circuit includes a diode D3 whose positive electrode is connected to the high beam signal end of the vehicle computer, a diode D3 whose negative electrode is connected to one end of a resistor R16, the other end of the resistor R16 is connected to one end of a resistor R17, one end of a capacitor C14, a negative electrode of a voltage zener diode ZD1 and one end of a resistor R19, the other end of the capacitor C14, the positive electrode of the voltage zener diode ZD1 and the other end of the resistor R19 are all connected to the power ground; the other end of the resistor R17 is connected to the MCU high beam collection signal input end.

[0013] In the above scheme: the left turn acquisition circuit includes a diode D4 cathode connected to the left turn signal end of the vehicle computer, the diode D4 anode connected to one end of the resistor R18 and one end of the resistor R20, the other end of the resistor R18 is connected to the SY_5V end of the power module, the other end of the resistor R20 is connected to one end of the resistor R21 and one end of the capacitor C19, the other end of the resistor R21 is connected to the MCU left turn acquisition signal input end, and the other end of the capacitor C19 is connected to the power ground;

[0014] The right turn acquisition circuit includes a diode D5 whose cathode is connected to the left turn signal end of the vehicle computer, and a diode D5 whose anode is connected to one end of a resistor R14 and one end of a resistor R22. The other end of the resistor R14 is connected to the SY_5V end of the power module. The other end of the resistor R22 is connected to one end of a resistor R23 and one end of a capacitor C18. The other end of the resistor R23 is connected to the right turn acquisition signal input end of the MCU, and the other end of the capacitor C18 is connected to the power ground.

[0015] In the above scheme: the OUT15 end of the LED driver chip U6 is connected to one end of the resistor R101, the other end of the resistor R101 is connected to one end of the resistor R102 and the gate of the MOS tube Q9, the other end of the resistor R102 is connected to the SY_5V end of the power module and the source of the MOS tube Q9, the drain of the MOS tube Q9 is connected to one end of the resistor R103 and the COM1 end of each LED display unit, and the other end of the resistor R103 is connected to the power ground;

[0016] The LED driver chip U6 OUT14 end is connected to one end of the resistor R104, the other end of the resistor R104 is connected to one end of the resistor R105 and the gate of the MOS tube Q10, the other end of the resistor R105 is connected to the SY_5V end of the power module and the source of the MOS tube Q10, the drain of the MOS tube Q10 is connected to one end of the resistor R106 and the COM2 end of each LED display unit, and the other end of the resistor R106 is connected to the power ground;

[0017] The LED driver chip U6 OUT13 end is connected to one end of the resistor R107, the other end of the resistor R107 is connected to one end of the resistor R108 and the gate of the MOS tube Q11, the other end of the resistor R108 is connected to the SY_5V end of the power module and the source of the MOS tube Q11, the drain of the MOS tube Q11 is connected to one end of the resistor R109 and the COM3 end of each LED display unit, and the other end of the resistor R109 is connected to the power ground;

[0018] The OUT12 end of the LED driver chip U6 is connected to one end of the resistor R110, the other end of the resistor R110 is connected to one end of the resistor R111 and the gate of the MOS tube Q12, the other end of the resistor R111 is connected to the SY_5V end of the power module and the source of the MOS tube Q12, the drain of the MOS tube Q12 is connected to one end of the resistor R112 and the COM4 end of each LED display unit, and the other end of the resistor R112 is connected to the power ground.

[0019] In the above scheme: the communication module includes a one-line communication circuit, a two-way communication circuit and a 485 communication circuit;

[0020] The one-line circuit includes one end of a resistor R45 connected to the one-line signal end of the vehicle and one end of a resistor R42, the other end of the resistor R42 is connected to the SY_5V end of the power module, the other end of the resistor R45 is connected to one end of a capacitor C24, one end of a resistor R47 and the base of a transistor Q6, the collector of the transistor Q6 is connected to one end of a resistor R36 and the base of a transistor Q4, the other end of the capacitor C24, the other end of the resistor R47, the emitter of the transistor Q6 and the emitter of the transistor Q4 are all connected to the power ground; the collector of the transistor Q4 is connected to the one-line signal input end of the MCU and one end of a resistor R29, the other end of the resistor R36 and the other end of the resistor R29 are both connected to the SY_5V end of the power module;

[0021] The bidirectional communication circuit includes one end of a resistor R43 connected to the bidirectional signal input end of the MCU, the other end of the resistor R43 connected to the base of the transistor Q5, the collector of the transistor Q5 connected to one end of the resistor R32, one end of the resistor R37 and one end of the capacitor C22, the other end of the resistor R32 connected to the MCU communication signal sending end, the collector of the transistor Q5 and the other end of the capacitor C22 are both connected to the power ground; the other end of the resistor R37 is connected to one end of the capacitor C23, one end of the resistor R44 and the base of the transistor Q3, the other end of the capacitor C23, the other end of the resistor R44 and the emitter of the transistor Q3 are all connected to the power ground, the collector of the transistor Q3 is connected to one end of the resistor R28 and one end of the resistor R34, the other end of the resistor R28 is connected to the SY_5V end of the power module, the other end of the resistor R34 is connected to one end of the capacitor C81 and the MCU communication signal receiving end, and the other end of the capacitor C81 is connected to the power ground.

[0022] In the above scheme: the 485 communication circuit includes a 485 communication chip U11, the communication output end of the 485 communication chip U11 is connected to one end of the capacitor C430, one end of the resistor R79 and the MCU485 communication signal receiving end, the other end of the resistor R79 is connected to the SY_5V end of the power module, and the other end of the capacitor C430 is connected to the power ground; the enabling end of the 485 communication chip U11 is connected to one end of the capacitor C429, one end of the resistor R84 and the MCU485 communication enabling end, the other end of the resistor R84 is connected to the SY_5V end of the power module, and the other end of the capacitor C429 is connected to the power ground; the communication input end of the 485 communication chip U11 is connected to one end of the capacitor C428 and the MCU485 communication signal sending end, and the other end of the capacitor C428 is connected to the power ground; the power supply voltage end of the 485 communication chip U11 is connected to one end of the capacitor C82, the capacitor C 57 one end and the SY_5V end of the power module, the other end of the capacitor C82 and the other end of the capacitor C57 are both connected to the power ground; the output end of the 485 communication chip U11B is connected to the first end of the filter L2, the output end of the 485 communication chip U11A is connected to the second end of the filter L2, the fourth end of the filter L2 is connected to one end of the resistor R83, one end of the resistor R82, one end of the resistor R80 and one end of the resistor R81, and the other end of the resistor R82 is connected to the power ground; the other end of the resistor R80 and the other end of the resistor R81 are both connected to the B end of the RS485 port of the vehicle computer, the third end of the filter L2 is connected to the other end of the resistor R83, one end of the resistor R95, one end of the resistor R85 and one end of the resistor R89, the other end of the resistor R95 is connected to the SY_5V end of the power module, and the other end of the resistor R85 and the other end of the resistor R89 ​​are both connected to the A end of the RS485 port of the vehicle computer.

[0023] In the above scheme: it also includes a photosensitive circuit, which includes a positive electrode of a photosensitive element U3 connected to the SY_5V end of the power module, a negative electrode of the photosensitive element U3 connected to one end of a resistor R56, one end of a resistor R55 and one end of a capacitor C26, the other end of the resistor R56 and the other end of the capacitor C26 are both connected to the power ground, and the other end of the resistor R55 is connected to the MCU photosensitivity signal input end.

[0024] In the above scheme: one end of capacitor C23, one end of resistor R44 and the base of transistor Q3, the other end of capacitor C23, the other end of resistor R44 and the emitter of transistor Q3 are all connected to the power ground, the collector of transistor Q3 is connected to one end of resistor R28 and one end of resistor R34, the other end of resistor R28 is connected to the SY_5V end of the power module, the other end of resistor R34 is connected to one end of capacitor C81 and the MCU communication signal receiving end, and the other end of capacitor C81 is connected to the power ground.

[0025] The present invention also provides a motorcycle instrument digital tube control method, comprising a motorcycle instrument digital tube control display circuit in the above scheme, and further comprising the following steps:

[0026] S1: display control;

[0027] S1-1: Select the type of digital tube;

[0028] S1-2: Control according to the programmed segment code table;

[0029] S1-3: The specific characters displayed are controlled by the segment selection pin, and the corresponding digital tubes are displayed according to the bit selection pin.

[0030] S1-4: Use dynamic scanning to quickly switch the bit selection signals in sequence, and use the visual persistence effect of the human eye to achieve simultaneous display of multiple digital tubes.

[0031] S1-5: adjust the duty cycle of the segment selection signal through PWM to control the brightness;

[0032] S2 performs short circuit detection in real time;

[0033] S2-1, MCU determines whether it has received a signal to turn on the motorcycle lights:

[0034] If the MCU does not receive the control signal to turn on the motorcycle lights, it will proceed to the next step;

[0035] If the MCU receives a control signal to turn on the motorcycle lights, step S2-4 is executed;

[0036] S2-2, MCU outputs the light-off level to the MCU light control output terminal, so that the transistor Q7 is in the cut-off state;

[0037] S2-3, the MCU determines whether the short-circuit detection signal received by the MCU headlight short-circuit detection signal terminal is less than or equal to the preset short-circuit voltage value:

[0038] If the short-circuit detection signal received by the MCU headlight short-circuit detection signal terminal is less than or equal to the preset short-circuit voltage value, it means that the headlight disconnection level output by the MCU to the MCU headlight control output terminal is correct; at this time, the motorcycle headlights are not lit;

[0039] If the short-circuit detection signal received by the MCU headlight short-circuit detection signal terminal is greater than the preset short-circuit voltage value, it means that the headlight disconnection level output by the MCU to the MCU headlight control output terminal is incorrect and needs to be repaired;

[0040] S2-4, MCU outputs the light-on level to the MCU light control output terminal, so that the transistor Q7 is in the on state;

[0041] S2-5, the MCU determines whether the short-circuit detection signal received by the MCU headlight short-circuit detection signal terminal is less than or equal to the preset short-circuit voltage value:

[0042] If the short-circuit detection signal received by the MCU headlight short-circuit detection signal terminal is less than or equal to the preset short-circuit voltage value, it means that the headlight disconnection level output by the MCU to the MCU headlight control output terminal is incorrect and needs to be repaired;

[0043] If the short-circuit detection signal received by the MCU headlight short-circuit detection signal terminal is greater than the preset short-circuit voltage value, it means that the headlight disconnection level output by the MCU to the MCU headlight control output terminal is correct; proceed to the next step;

[0044] S2-6, the MCU determines whether the feedback detection signal received by the MCU headlight output feedback signal input terminal is greater than or equal to the preset feedback voltage value:

[0045] If the feedback detection signal received by the MCU headlight output feedback signal input terminal is greater than or equal to the preset feedback voltage value, it means that the motorcycle headlight power supply is normal, and the next step is executed;

[0046] If the feedback detection signal received by the MCU headlight output feedback signal input terminal is less than the preset feedback voltage value, it means that the motorcycle headlight power supply is abnormal and needs to be repaired;

[0047] S2-7, judging whether the motorcycle lights are on:

[0048] If the motorcycle lights are on, you can drive on the road with the motorcycle lights on;

[0049] If the motorcycle lights are not on, it means that the motorcycle lights are damaged and need to be replaced. To detect whether the motorcycle lights are on, a light sensor can be set to detect.

[0050] In summary, the beneficial effects of the present invention are: stable control, clear display, the ability to display corresponding pictures or effects according to the control of the control circuit, fast response speed, and suitable for dynamic display. The circuit design is simple, the control logic is not complicated, and it is easy to integrate into various electronic devices. The modular design is easy to replace, simple to repair, and reduces maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 It is a system diagram of the present invention.

[0052] Figure 2 This is the circuit diagram of the MCU.

[0053] Figure 3 This is the circuit diagram of the LED driver module.

[0054] Figure 4 It is the circuit diagram of LED display module.

[0055] Figure 5 This is the circuit diagram of the power module.

[0056] Figure 6 It is the circuit diagram of the power collection circuit.

[0057] Figure 7 This is the circuit diagram of the high beam collection circuit.

[0058] Figure 8 It is the circuit diagram of the left turn acquisition circuit.

[0059] Fig. 9 It is the circuit diagram of the right turn acquisition circuit.

[0060] Fig.10 It is the circuit diagram of the communication module.

[0061] Fig.11 It is the circuit diagram of the photosensitive circuit.

[0062] Fig.12 It is the circuit diagram of the Bluetooth LED display circuit.

[0063] Fig.13 This is the circuit diagram of the car light output circuit.

[0064] Fig.14 This is the circuit diagram of the headlight enabling circuit.

[0065] Fig.15 A three-dimensional schematic diagram of the present invention Figure 1 .

[0066] Fig.16 A three-dimensional schematic diagram of the present invention Figure 2 .

[0067] Fig.17 For the purpose of illustrating the present invention Figure 1 .

[0068] Fig.18 For the purpose of illustrating the present invention Figure 2 .

[0069] Fig.19 It is a schematic diagram of the upper cover in the present invention.

[0070] Fig. 20 Schematic diagram of the bottom shell of the present invention.

[0071] Fig.21 It is a schematic diagram of the support member in the present invention.

[0072] Fig. 22 is a schematic diagram of a backlight assembly in the present invention. DETAILED DESCRIPTION

[0073] The present invention will be further described below by way of embodiments and in conjunction with the accompanying drawings:

[0074] like Figure 1 to Figure 14 As shown, a motorcycle instrument digital tube control display circuit includes an acquisition module, an LED drive module, a power module and a communication module. The power module is used to power various components, and the communication module is used to connect MCUU16 with the vehicle computer for communication. The acquisition signal output end of the acquisition module is connected to the acquisition signal input end of MCUU16, and the photosensitive signal output end of the photosensitive circuit is connected to the photosensitive signal input end of MCUU16; the signal input end of the LED drive module is connected to the LED drive signal output end of MCUU16, and the drive output end of the LED drive module is connected to the drive input end of the LED display module.

[0075] The headlight output circuit includes a resistor R46 connected to the MCUU16 headlight control output terminal at one end, the resistor R46 connected to the resistor R48 at one end, the capacitor C36 at one end and the transistor Q7 base at the other end, the resistor R48 at the other end, the capacitor C36 at the other end and the transistor Q7 emitter at the other end are connected to the power ground, the transistor Q7 collector is connected to the resistor R41 at one end and the resistor R38 at one end, the resistor R41 at the other end and the resistor R38 at the other end are connected to the MOS tube T1 gate and the resistor R35 at one end. , the other end of the resistor R35 is connected to the 12V battery power supply end, the source of the MOS tube T1 is connected to one end of the resistor R26 and one end of the resistor R33, the other end of the resistor R33 is connected to the base of the transistor Q2, the other end of the resistor R26 is connected to the emitter of the transistor Q2 and the 12V battery power supply end, the collector of the transistor Q2 is connected to one end of the resistor R39, the other end of the resistor R39 is connected to the MCUU16 headlight short circuit detection signal end and one end of the resistor R40, and the other end of the resistor R40 is connected to the power ground;

[0076] The drain of MOS tube T1 is the light control output end, connected to the body light, the drain of MOS tube T1 is connected to one end of resistor R72 and one end of capacitor C34, the other end of resistor R72 is the light output feedback signal output end, connected to the light output feedback signal input end of MCUU16, one end of capacitor C33 and one end of resistor R73, the other end of capacitor C33, the other end of resistor R73 and the other end of capacitor C34 are connected to the power ground;

[0077] The light enabling circuit includes a resistor R49, one end of which is connected to the output end of the light enabling signal of the vehicle body, the other end of which is connected to one end of a resistor R50 and one end of a resistor R51, the other end of which is connected to the input end of the light enabling signal of MCUU16 and one end of a capacitor C25, and the other end of the resistor R51 and the other end of the capacitor C25 are both connected to the power ground;

[0078] The power module includes a diode D6 positive electrode connected to the positive electrode of the diode D1, one end of the capacitor C5, one end of the capacitor C6, one end of the capacitor C7, one end of the capacitor C8 and the ACC power supply end of the vehicle machine, a diode D6 negative electrode connected to the negative electrode of the diode D1, one end of the electrolytic capacitor EC1, one end of the capacitor C9, one end of the capacitor C10, one end of the capacitor C11, one end of the capacitor C12 and the DC-DC power chip U1Drain end, the other end of the capacitor C5, the other end of the capacitor C6, the other end of the capacitor C7, the other end of the capacitor C8, the other end of the electrolytic capacitor EC1, the other end of the capacitor C9, the other end of the capacitor C10, the other end of the capacitor C11, and the other end of the capacitor C12 are all connected to the power ground, the working voltage end of the DC-DC power chip U1 is connected to one end of the capacitor C4, the other end of the capacitor C4 is connected to the ground end of the DC-DC power chip U1, and the feedback end of the DC-DC power chip U1 is connected One end of the resistor R3 and one end of the resistor R10, the other end of the resistor R10 is connected to the ground end of the DC-DC power chip U1, the other end of the resistor R3 is the SY_5V end of the power module, outputting a 5V voltage, the other end of the resistor R3 is connected to one end of the inductor L1, one end of the electrolytic capacitor EC3, one end of the electrolytic capacitor EC4, one end of the electrolytic capacitor EC2 and one end of the resistor R13; one end of the inductor L1 is connected to the ground end of the DC-DC power chip U1, one end of the resistor R12 and one end of the Schottky diode D2, the other end of the inductor L1, the other end of the electrolytic capacitor EC3, the other end of the electrolytic capacitor EC4, the other end of the electrolytic capacitor EC2, the other end of the resistor R12, the other end of the resistor R13, and the other two ends of the Schottky diode D2 are all connected to the power ground, the CS end of the DC-DC power chip U1 is connected to one end of the resistor R9, and the other end of the resistor R9 is connected to the ground end of the DC-DC power chip U1;

[0079] The collection module includes a power collection circuit, a high beam collection circuit, a left turn collection circuit, and a right turn collection circuit.

[0080] The power collection circuit includes a resistor R76, one end of which is connected to the ACC power supply end of the vehicle machine and one end of the capacitor C56; the other end of the resistor R76 is connected to one end of the resistor R77 and one end of the resistor R78; the other end of the resistor R78 is connected to the MCUU16 power supply power collection signal input end and the cathode of the voltage-stabilizing diode ZD2; the other end of the resistor R77, the other end of the capacitor C56 and the anode of the voltage-stabilizing diode ZD2 are all connected to the power ground;

[0081] The high-beam collection circuit includes a diode D3 anode connected to the high-beam signal end of the vehicle, a diode D3 cathode connected to one end of a resistor R16, the other end of the resistor R16 connected to one end of a resistor R17, one end of a capacitor C14, a cathode of a voltage-stabilizing diode ZD1 and one end of a resistor R19, the other end of the capacitor C14, a cathode of a voltage-stabilizing diode ZD1 and the other end of the resistor R19 are all connected to the power ground; the other end of the resistor R17 is connected to the high-beam collection signal input end of the MCUU16;

[0082] The left turn acquisition circuit includes a diode D4 cathode connected to the left turn signal end of the vehicle computer, a diode D4 anode connected to one end of a resistor R18 and one end of a resistor R20, the other end of the resistor R18 connected to the SY_5V end of the power module, the other end of the resistor R20 connected to one end of a resistor R21 and one end of a capacitor C19, the other end of the resistor R21 connected to the left turn acquisition signal input end of MCUU16, and the other end of the capacitor C19 connected to the power ground;

[0083] The right turn acquisition circuit includes a diode D5 cathode connected to the left turn signal terminal of the vehicle computer, a diode D5 anode connected to one end of a resistor R14 and one end of a resistor R22, the other end of the resistor R14 is connected to the SY_5V terminal of the power module, the other end of the resistor R22 is connected to one end of a resistor R23 and one end of a capacitor C18, the other end of the resistor R23 is connected to the right turn acquisition signal input terminal of MCUU16, and the other end of the capacitor C18 is connected to the power ground;

[0084] The communication module includes a one-line communication circuit, a two-way communication circuit and a 485 communication circuit.

[0085] The one-line circuit includes one end of a resistor R45 connected to the one-line signal end of the vehicle and one end of a resistor R42, the other end of the resistor R42 connected to the SY_5V end of the power module, the other end of the resistor R45 connected to one end of the capacitor C24, one end of the resistor R47 and the base of the transistor Q6, the collector of the transistor Q6 connected to one end of the resistor R36 and the base of the transistor Q4, the other end of the capacitor C24, the other end of the resistor R47, the emitter of the transistor Q6 and the emitter of the transistor Q4 are all connected to the power ground; the collector of the transistor Q4 is connected to the one-line signal input end of the MCUU16 and one end of the resistor R29, and the other end of the resistor R36 and the other end of the resistor R29 are both connected to the SY_5V end of the power module;

[0086] The bidirectional communication circuit includes a resistor R43, one end of which is connected to the bidirectional signal input end of MCUU16, the other end of which is connected to the base of transistor Q5, the collector of transistor Q5 is connected to one end of resistor R32, one end of resistor R37 and one end of capacitor C22, the other end of resistor R32 is connected to the communication signal sending end of MCUU16, the collector of transistor Q5 and the other end of capacitor C22 are both connected to the power ground; the other end of resistor R37 is connected to one end of capacitor C23, one end of resistor R44 and the base of transistor Q3, the other end of capacitor C23, the other end of resistor R44 and the emitter of transistor Q3 are all connected to the power ground, the collector of transistor Q3 is connected to one end of resistor R28 and one end of resistor R34, the other end of resistor R28 is connected to the SY_5V end of the power module, the other end of resistor R34 is connected to one end of capacitor C81 and the communication signal receiving end of MCUU16, and the other end of capacitor C81 is connected to the power ground;

[0087] The 485 communication circuit includes a 485 communication chip U11, wherein the communication output end of the 485 communication chip U11 is connected to one end of a capacitor C430, one end of a resistor R79 and a communication signal receiving end of the MCUU16485, the other end of the resistor R79 is connected to the SY_5V end of the power module, and the other end of the capacitor C430 is connected to the power ground; the enable end of the 485 communication chip U11 is connected to one end of a capacitor C429, one end of a resistor R84 and a communication enable end of the MCUU16485, the other end of the resistor R84 is connected to the SY_5V end of the power module, and the other end of the capacitor C429 is connected to the power ground; the communication input end of the 485 communication chip U11 is connected to one end of a capacitor C428 and a communication signal sending end of the MCUU16485, and the other end of the capacitor C428 is connected to the power ground; the power supply voltage end of the 485 communication chip U11 is connected to one end of a capacitor C82, one end of a resistor R84 and a communication enable end of the MCUU16485, the other end of the resistor R84 is connected to the SY_5V end of the power module, and the other end of the capacitor C429 is connected to the power ground. One end of capacitor C57 is connected to the SY_5V end of the power module, and the other end of capacitor C82 and the other end of capacitor C57 are connected to the power ground; the output end of 485 communication chip U11B is connected to the first end of filter L2, the output end of 485 communication chip U11A is connected to the second end of filter L2, the fourth end of filter L2 is connected to one end of resistor R83, one end of resistor R82, one end of resistor R80 and one end of resistor R81, and the other end of resistor R82 is connected to the power ground; the other end of resistor R80 and the other end of resistor R81 are connected to the B end of RS485 port of the vehicle computer, the third end of filter L2 is connected to the other end of resistor R83, one end of resistor R95, one end of resistor R85 and one end of resistor R89, the other end of resistor R95 is connected to the SY_5V end of the power module, and the other end of resistor R85 and the other end of resistor R89 ​​are connected to the A end of RS485 port of the vehicle computer;

[0088] It also includes a photosensitive circuit, the photosensitive circuit includes a positive electrode of a photosensitive element U3 connected to the SY_5V terminal of a power module, a negative electrode of the photosensitive element U3 connected to one end of a resistor R56, one end of a resistor R55 and one end of a capacitor C26, the other end of the resistor R56 and the other end of the capacitor C26 are both connected to the power ground, and the other end of the resistor R55 is connected to the photosensitive signal input terminal of MCUU16;

[0089] It also includes a Bluetooth LED display circuit, which includes a positive electrode of a light-emitting diode LED19 connected to a Bluetooth signal output terminal of MCUU16 and one end of a resistor R8, a negative electrode of the light-emitting diode LED19 connected to one end of a resistor R6, and the other end of the resistor R6 and the other end of the resistor R8 are both connected to a power ground;

[0090] The LED driver module includes an LED driver chip U4, wherein the driving signal input end of the LED driver chip U4 is connected to the LED driving signal output end of the MCUU16, the clock end of the LED driver chip U4 is connected to the LED driving clock end of the MCUU16, the LE end of the LED driver chip U4 is connected to the MCUU16PD06 / SEG34 end, the working voltage end of the LED driver chip U4 is connected to the SY_5V end of the power module, one end of the capacitor C27 and one end of the capacitor C28, the other end of the capacitor C27 and the other end of the capacitor C28 are both connected to the power ground, and the OE end of the LED driver chip U4 is connected to the MCUU16PD07 / SEG33 end;

[0091] The communication signal output end of LED driver chip U4 is connected to the driving signal input end of LED driver chip U5, the clock end of LED driver chip U5 is connected to the MCUU16LED driving clock end, the LED driver chip U5LE end is connected to the MCUU16PD06 / SEG34 end, the working voltage end of LED driver chip U5 is connected to the SY_5V end of the power module, one end of capacitor C29 and one end of capacitor C30, and the other end of capacitor C29 and the other end of capacitor C30 are both connected to the power ground;

[0092] The communication signal output end of LED driver chip U5 is connected to the driving signal input end of LED driver chip U6, the clock end of LED driver chip U6 is connected to the MCUU16LED driving clock end, the LED driver chip U6LE end is connected to the MCUU16PD06 / SEG34 end, the working voltage end of LED driver chip U6 is connected to the SY_5V end of the power module, one end of capacitor C31 and one end of capacitor C32, and the other end of capacitor C31 and the other end of capacitor C32 are both connected to the power ground;

[0093] The LED display module includes a plurality of LED display units, each driving output end of the LED driver chip U4, the LED driver chip U5, and the LED driver chip U6 is respectively connected to the driving input end of each LED display unit, each LED display unit is provided with 4 LED diodes, and the positive poles of the 4 LED diodes are respectively connected to different control pins, and the negative poles of the LED diodes of the same LED display unit are all connected to the same driving output end of the LED driver chip;

[0094] The LED driver chip U6 OUT15 terminal is connected to one end of the resistor R101, the other end of the resistor R101 is connected to one end of the resistor R102 and the gate of the MOS tube Q9, the other end of the resistor R102 is connected to the SY_5V terminal of the power module and the source of the MOS tube Q9, the drain of the MOS tube Q9 is connected to one end of the resistor R103 and the COM1 terminal of each LED display unit, and the other end of the resistor R103 is connected to the power ground;

[0095] The LED driver chip U6 OUT14 terminal is connected to one end of the resistor R104, the other end of the resistor R104 is connected to one end of the resistor R105 and the gate of the MOS tube Q10, the other end of the resistor R105 is connected to the SY_5V terminal of the power module and the source of the MOS tube Q10, the drain of the MOS tube Q10 is connected to one end of the resistor R106 and the COM2 terminal of each LED display unit, and the other end of the resistor R106 is connected to the power ground;

[0096] The LED driver chip U6 OUT13 terminal is connected to one end of the resistor R107, the other end of the resistor R107 is connected to one end of the resistor R108 and the gate of the MOS tube Q11, the other end of the resistor R108 is connected to the SY_5V terminal of the power module and the source of the MOS tube Q11, the drain of the MOS tube Q11 is connected to one end of the resistor R109 and the COM3 terminal of each LED display unit, and the other end of the resistor R109 is connected to the power ground;

[0097] The OUT12 end of the LED driver chip U6 is connected to one end of the resistor R110, the other end of the resistor R110 is connected to one end of the resistor R111 and the gate of the MOS tube Q12, the other end of the resistor R111 is connected to the SY_5V end of the power module and the source of the MOS tube Q12, the drain of the MOS tube Q12 is connected to one end of the resistor R112 and the COM4 end of each LED display unit, and the other end of the resistor R112 is connected to the power ground.

[0098] The present invention also provides a motorcycle instrument digital tube control method, comprising the following steps:

[0099] S1: display control;

[0100] S1-1: Select the type of digital tube;

[0101] S1-2: Control according to the programmed segment code table;

[0102] S1-3: The specific characters displayed are controlled by the segment selection pin, and the corresponding digital tubes are displayed according to the bit selection pin.

[0103] S1-4: Use dynamic scanning to quickly switch the bit selection signals in sequence, and use the visual persistence effect of the human eye to achieve simultaneous display of multiple digital tubes.

[0104] S1-5: adjust the duty cycle of the segment selection signal through PWM to control the brightness;

[0105] S2 performs short circuit detection in real time;

[0106] S2-1, MCU determines whether it has received a signal to turn on the motorcycle lights:

[0107] If the MCU does not receive the control signal to turn on the motorcycle lights, it will proceed to the next step;

[0108] If the MCU receives a control signal to turn on the motorcycle lights, step S2-4 is executed;

[0109] S2-2, MCU outputs the light-off level to the MCU light control output terminal, so that the transistor Q7 is in the cut-off state;

[0110] S2-3, the MCU determines whether the short-circuit detection signal received by the MCU headlight short-circuit detection signal terminal is less than or equal to the preset short-circuit voltage value:

[0111] If the short-circuit detection signal received by the MCU headlight short-circuit detection signal terminal is less than or equal to the preset short-circuit voltage value, it means that the headlight disconnection level output by the MCU to the MCU headlight control output terminal is correct; at this time, the motorcycle headlights are not lit;

[0112] If the short-circuit detection signal received by the MCU headlight short-circuit detection signal terminal is greater than the preset short-circuit voltage value, it means that the headlight disconnection level output by the MCU to the MCU headlight control output terminal is incorrect and needs to be repaired;

[0113] S2-4, MCU outputs the light-on level to the MCU light control output terminal, so that the transistor Q7 is in the on state;

[0114] S2-5, the MCU determines whether the short-circuit detection signal received by the MCU headlight short-circuit detection signal terminal is less than or equal to the preset short-circuit voltage value:

[0115] If the short-circuit detection signal received by the MCU headlight short-circuit detection signal terminal is less than or equal to the preset short-circuit voltage value, it means that the headlight disconnection level output by the MCU to the MCU headlight control output terminal is incorrect and needs to be repaired;

[0116] If the short-circuit detection signal received by the MCU headlight short-circuit detection signal terminal is greater than the preset short-circuit voltage value, it means that the headlight disconnection level output by the MCU to the MCU headlight control output terminal is correct; proceed to the next step;

[0117] S2-6, the MCU determines whether the feedback detection signal received by the MCU headlight output feedback signal input terminal is greater than or equal to the preset feedback voltage value:

[0118] If the feedback detection signal received by the MCU headlight output feedback signal input terminal is greater than or equal to the preset feedback voltage value, it means that the motorcycle headlight power supply is normal, and the next step is executed;

[0119] If the feedback detection signal received by the MCU headlight output feedback signal input terminal is less than the preset feedback voltage value, it means that the motorcycle headlight power supply is abnormal and needs to be repaired;

[0120] S2-7, judging whether the motorcycle lights are on:

[0121] If the motorcycle lights are on, you can drive on the road with the motorcycle lights on;

[0122] If the motorcycle lights are not on, it means that the motorcycle lights are damaged and need to be replaced. To detect whether the motorcycle lights are on, a light sensor can be set to detect.

[0123] The control display circuit of the present invention is suitable for Figures 15 to 22 The motorcycle instrument shown is mainly composed of an instrument body and a backlight assembly, wherein the instrument body includes a display screen 1, an upper cover 2 and a bottom shell 3, the display screen 1 is used to display operating parameters, the upper cover 2 and the bottom shell 3 are arranged up and down, and the backlight assembly and the display screen 1 are both arranged in the bottom shell 3 through a mounting structure, and a display glass 4 for displaying the display screen is arranged on the upper cover 2, and the display glass is glass silk-screen.

[0124] The backlight assembly includes a PCB board 5, a light guide plate 6, a light guide plate support 7 and a light homogenizer 8, and the light homogenizer 8, the light guide plate 6, the light guide plate support 7 and the PCB board 5 are arranged in sequence below the display screen 1, and one end of the light guide plate 6 is set as an arc-shaped light guide end 6a extending toward the light guide plate support 7, and the light guide end 6a is located outside the light guide plate support 7. At the same time, a backlight light source that can directly illuminate the light guide end 6a is arranged on the PCB board 5. Preferably, the backlight light source is an LED lamp.

[0125] The backlight source directly shines on the light guide end, and then the light is refracted and reflected in the light guide plate. Since the light guide plate is provided with an arc-shaped light guide end, the light can cover the entire light guide plate. Finally, under the action of the light uniformity sheet, the light projected onto the display screen is guaranteed to be uniform.

[0126] To reduce the loss of light energy, the thickness of the light guide plate 6 gradually decreases from one side of the light guide end to the other side. Preferably, the light guide end is arranged at the front side. To facilitate the processing of the light guide plate, the light guide plate 6 is made of PMMA material, that is, organic glass.

[0127] The mounting structure includes a support member 10 disposed in the bottom shell 3, a rectangular cavity for mounting the display screen 1, the light homogenizer 8, the light guide plate 6, and the light guide plate support 7 is disposed in the support member 10, and limiting posts 10a for limiting the upward movement of the display screen are disposed on the four sides of the cavity, and the PCB board 5 is disposed on the support member 10 and located at the lower end of the cavity, that is, the display screen 1, the light homogenizer 8, the light guide plate 6, and the light guide plate support 7 are disposed in the cavity through the limiting posts and the PCB board. Preferably, two limiting posts are disposed at intervals on each side of the cavity.

[0128] To facilitate the installation of the PCB board, a positioning column 10b is provided on the bottom surface of the support member 10, and a positioning notch 5a is correspondingly provided on the PCB board. To achieve the installation of the light-homogenizing sheet, a light-homogenizing positioning hole 8a for installing the light-homogenizing sheet is provided on the light-homogenizing sheet 8, and a light-homogenizing positioning column 10d capable of passing through the light-homogenizing positioning hole is provided on the support member 10. Preferably, the light-homogenizing positioning hole is provided on the ear of the light-homogenizing sheet, and at least two light-homogenizing positioning holes are provided. When two light-homogenizing positioning holes are provided, the two light-homogenizing positioning holes are provided on two non-adjacent sides, and the two light-homogenizing positioning holes are not provided in an axisymmetric manner.

[0129] To ensure the installation of the light guide plate, a positioning block 7a is provided on the light guide plate support 7, a positioning groove 10e corresponding to the positioning block is provided on the support member 10, and positioning blocks are provided on the four sides of the light guide plate support block.

[0130] A menu button 11 and a setting button 12 for adjusting the displayed content are arranged outside the instrument body. Preferably, the display screen is arranged higher than the supporting member, and an operating hole for the menu button and the setting button to extend out is arranged on the upper cover.

[0131] In order to achieve the sealing between the upper cover and the bottom shell, a multi-layer step sealing structure is adopted between the upper cover 2 and the bottom shell 3, and a sealing ring 9 is arranged in the inner layer. The multi-layer step sealing structure specifically includes an inner layer protrusion 3a arranged on the bottom shell 3 and an outer layer protrusion 3b arranged on the bottom shell 3, a middle layer groove 3c is arranged between the inner layer protrusion 3a and the outer layer protrusion 3b, and the height of the inner layer protrusion 3a is greater than the height of the outer layer protrusion 3b, and at the same time, a step with a lower outer side and a higher inner side is arranged on the end face of the outer layer protrusion 3b, an inner layer groove 2a for the inner layer protrusion 3a to be inserted, a middle layer protrusion 2b that can be inserted into the middle layer groove 3c, and a matching protrusion 2c that matches the outer layer protrusion 3b, and a spacing is left between the middle layer protrusion and the outer layer protrusion, and the sealing ring 9 is arranged in the inner layer groove 2a, and a small protrusion for limiting the sealing ring is arranged in the inner layer groove. Preferably, a supporting rib is arranged between the middle layer protrusion 2b and the matching protrusion 2c. This structure can effectively prevent water from entering the instrument body.

[0132] A vent hole is provided below the bottom shell 3, and a waterproof breathable membrane 13 is provided in the vent hole to prevent water from entering. To facilitate the installation of the waterproof breathable membrane, a breathable column is provided in the bottom shell, and the vent hole is provided in the breathable column. At the same time, a waterproof connector 14 for data or power input and output is provided on the bottom shell 3.

[0133] In order to realize the installation between the support member 10 and the bottom shell 3, a support positioning column 3d is provided on the bottom shell 3, and a support positioning hole 10c for the support positioning column to pass through is provided on the support member 10, and the mounting bolts between the bottom shell and the upper cover pass through the support member, thereby reducing the setting of the mounting bolts. In order to facilitate the installation of the entire instrument, a mounting nut is embedded on the bottom surface of the bottom shell.

Claims

1. A motorcycle instrument digital tube control display circuit, characterized in that: It includes an acquisition module, an LED driving module, a power module and a communication module. The power module is used to supply power to various components. The communication module is used to connect the MCU (U16) with the vehicle computer for communication. The acquisition signal output end of the acquisition module is connected to the acquisition signal input end of the MCU (U16). The photosensitive signal output end of the photosensitive circuit is connected to the photosensitive signal input end of the MCU (U16). The LED driving module signal input end is connected to the MCU (U16) LED driving signal output end. The LED driving module driving output end is connected to the LED display module driving input end. The LED driver module comprises an LED driver chip U4, wherein the driving signal input terminal of the LED driver chip U4 is connected to the LED driving signal output terminal of the MCU (U16), the clock terminal of the LED driver chip U4 is connected to the LED driving clock terminal of the MCU (U16), the LED driver chip U4LE terminal is connected to the MCU (U16) PD06 / SEG34 terminal, the LED driver chip U4 working voltage terminal is connected to the SY_5V terminal of the power module, one end of the capacitor C27 and one end of the capacitor C28, the other end of the capacitor C27 and the other end of the capacitor C28 are both connected to the power ground, and the LED driver chip U4OE terminal is connected to the MCU (U16) PD07 / SEG33 terminal; The communication signal output end of the LED driver chip U4 is connected to the drive signal input end of the LED driver chip U5, the clock end of the LED driver chip U5 is connected to the LED drive clock end of the MCU (U16), the LED driver chip U5LE end is connected to the MCU (U16) PD06 / SEG34 end, the working voltage end of the LED driver chip U5 is connected to the SY_5V end of the power module, one end of the capacitor C29 and one end of the capacitor C30, and the other end of the capacitor C29 and the other end of the capacitor C30 are both connected to the power ground; The communication signal output end of the LED driver chip U5 is connected to the drive signal input end of the LED driver chip U6, the clock end of the LED driver chip U6 is connected to the LED drive clock end of the MCU (U16), the LED driver chip U6LE end is connected to the MCU (U16) PD06 / SEG34 end, the working voltage end of the LED driver chip U6 is connected to the SY_5V end of the power module, one end of the capacitor C31 and one end of the capacitor C32, and the other end of the capacitor C31 and the other end of the capacitor C32 are both connected to the power ground; The LED display module includes a plurality of LED display units, and each driving output end of the LED driving chip U4, the LED driving chip U5, and the LED driving chip U6 is respectively connected to the driving input end of each LED display unit.

2. A motorcycle instrument digital tube control display circuit according to claim 1, characterized in that: The power module comprises a positive electrode of a diode D6 connected to a positive electrode of a diode D1, one end of a capacitor C5, one end of a capacitor C6, one end of a capacitor C7, one end of a capacitor C8 and a power supply end of a vehicle machine ACC; a negative electrode of a diode D6 connected to a negative electrode of a diode D1, one end of an electrolytic capacitor EC1, one end of a capacitor C9, one end of a capacitor C10, one end of a capacitor C11, one end of a capacitor C12 and a Drain end of a DC-DC power chip (U1); the other ends of the capacitor C5, the other ends of the capacitor C6, the other ends of the capacitor C7, the other ends of the capacitor C8, the other ends of the electrolytic capacitor EC1, the other ends of the capacitor C9, the other ends of the capacitor C10, the other ends of the capacitor C11 and the other ends of the capacitor C12 are all connected to a power ground; a working voltage end of the DC-DC power chip (U1) is connected to one end of a capacitor C4, the other end of the capacitor C4 is connected to a ground end of the DC-DC power chip (U1), and a feedback end of the DC-DC power chip (U1) is connected to a power ground. One end of the resistor R3 and one end of the resistor R10, the other end of the resistor R10 is connected to the ground end of the DC-DC power chip (U1), the other end of the resistor R3 is the SY_5V end of the power module, outputting a 5V voltage, the other end of the resistor R3 is connected to one end of the inductor L1, one end of the electrolytic capacitor EC3, one end of the electrolytic capacitor EC4, one end of the electrolytic capacitor EC2 and one end of the resistor R13; one end of the inductor L1 is connected to the ground end of the DC-DC power chip (U1), one end of the resistor R12 and one end of the Schottky diode D2, the other ends of the inductor L1, the other ends of the electrolytic capacitor EC3, the other ends of the electrolytic capacitor EC4, the other ends of the electrolytic capacitor EC2, the other ends of the resistor R12, the other ends of the resistor R13 and the other two ends of the Schottky diode D2 are all connected to the power ground, the CS end of the DC-DC power chip (U1) is connected to one end of the resistor R9, and the other end of the resistor R9 is connected to the ground end of the DC-DC power chip (U1).

3. A motorcycle instrument digital tube control display circuit according to claim 2, characterized in that: The collection module includes a power collection circuit, a high beam collection circuit, a left turn collection circuit, and a right turn collection circuit. The power collection circuit includes a resistor R76, one end of which is connected to the ACC power supply end of the vehicle computer and one end of the capacitor C56; the other end of the resistor R76 is connected to one end of the resistor R77 and one end of the resistor R78; the other end of the resistor R78 is connected to the MCU (U16) power supply power collection signal input end and the cathode of the voltage-stabilizing diode ZD2; the other end of the resistor R77, the other end of the capacitor C56 and the anode of the voltage-stabilizing diode ZD2 are all connected to the power ground; The high beam collection circuit includes a diode D3 whose positive electrode is connected to the high beam signal end of the vehicle computer, a diode D3 whose negative electrode is connected to one end of a resistor R16, the other end of the resistor R16 is connected to one end of a resistor R17, one end of a capacitor C14, a negative electrode of a voltage-stabilizing diode ZD1 and one end of a resistor R19, the other end of the capacitor C14, the positive electrode of the voltage-stabilizing diode ZD1 and the other end of the resistor R19 are all connected to the power ground; the other end of the resistor R17 is connected to the high beam collection signal input end of the MCU (U16).

4. A motorcycle instrument digital tube control display circuit according to claim 3, characterized in that: The left-turn acquisition circuit includes a diode D4 cathode connected to the left-turn signal end of the vehicle computer, a diode D4 anode connected to one end of a resistor R18 and one end of a resistor R20, the other end of the resistor R18 connected to the SY_5V end of the power module, the other end of the resistor R20 connected to one end of a resistor R21 and one end of a capacitor C19, the other end of the resistor R21 connected to the left-turn acquisition signal input end of the MCU (U16), and the other end of the capacitor C19 connected to the power ground; The right turn acquisition circuit includes a diode D5 whose cathode is connected to the left turn signal terminal of the vehicle computer, and a diode D5 whose anode is connected to one end of a resistor R14 and one end of a resistor R22. The other end of the resistor R14 is connected to the SY_5V terminal of the power module. The other end of the resistor R22 is connected to one end of a resistor R23 and one end of a capacitor C18. The other end of the resistor R23 is connected to the right turn acquisition signal input terminal of the MCU (U16). The other end of the capacitor C18 is connected to the power ground.

5. A motorcycle instrument digital tube control display circuit according to claim 2, characterized in that: The LED driver chip U6 OUT15 end is connected to one end of the resistor R101, the other end of the resistor R101 is connected to one end of the resistor R102 and the gate of the MOS tube Q9, the other end of the resistor R102 is connected to the SY_5V end of the power module and the source of the MOS tube Q9, the drain of the MOS tube Q9 is connected to one end of the resistor R103 and the COM1 end of each LED display unit, and the other end of the resistor R103 is connected to the power ground; The LED driver chip U6 OUT14 end is connected to one end of the resistor R104, the other end of the resistor R104 is connected to one end of the resistor R105 and the gate of the MOS tube Q10, the other end of the resistor R105 is connected to the SY_5V end of the power module and the source of the MOS tube Q10, the drain of the MOS tube Q10 is connected to one end of the resistor R106 and the COM2 end of each LED display unit, and the other end of the resistor R106 is connected to the power ground; The LED driver chip U6 OUT13 end is connected to one end of the resistor R107, the other end of the resistor R107 is connected to one end of the resistor R108 and the gate of the MOS tube Q11, the other end of the resistor R108 is connected to the SY_5V end of the power module and the source of the MOS tube Q11, the drain of the MOS tube Q11 is connected to one end of the resistor R109 and the COM3 end of each LED display unit, and the other end of the resistor R109 is connected to the power ground; The OUT12 end of the LED driver chip U6 is connected to one end of the resistor R110, the other end of the resistor R110 is connected to one end of the resistor R111 and the gate of the MOS tube Q12, the other end of the resistor R111 is connected to the SY_5V end of the power module and the source of the MOS tube Q12, the drain of the MOS tube Q12 is connected to one end of the resistor R112 and the COM4 end of each LED display unit, and the other end of the resistor R112 is connected to the power ground.

6. A motorcycle instrument digital tube control display circuit according to claim 2, characterized in that: The communication module includes a one-line communication circuit, a two-way communication circuit and a 485 communication circuit; The one-line circuit includes a resistor R45, one end of which is connected to the one-line signal end of the vehicle and one end of the resistor R42; the other end of the resistor R42 is connected to the SY_5V end of the power module; the other end of the resistor R45 is connected to one end of the capacitor C24, one end of the resistor R47 and the base of the transistor Q6; the collector of the transistor Q6 is connected to one end of the resistor R36 and the base of the transistor Q4; the other end of the capacitor C24, the other end of the resistor R47, the emitter of the transistor Q6 and the emitter of the transistor Q4 are all connected to the power ground; the collector of the transistor Q4 is connected to the one-line signal input end of the MCU (U16) and one end of the resistor R29; the other end of the resistor R36 and the other end of the resistor R29 are both connected to the SY_5V end of the power module; The bidirectional communication circuit includes one end of a resistor R43 connected to the bidirectional communication signal input end of the MCU (U16), the other end of the resistor R43 connected to the base of the transistor Q5, the collector of the transistor Q5 connected to one end of a resistor R32, one end of a resistor R37 and one end of a capacitor C22, the other end of the resistor R32 connected to the communication signal sending end of the MCU (U16), the collector of the transistor Q5 and the other end of the capacitor C22 are both connected to the power ground; the other end of the resistor R37 is connected to one end of the capacitor C23, one end of the resistor R44 and the base of the transistor Q3, the other end of the capacitor C23, the other end of the resistor R44 and the emitter of the transistor Q3 are all connected to the power ground, the collector of the transistor Q3 is connected to one end of a resistor R28 and one end of a resistor R34, the other end of the resistor R28 is connected to the SY_5V end of the power module, the other end of the resistor R34 is connected to one end of a capacitor C81 and the communication signal receiving end of the MCU (U16), and the other end of the capacitor C81 is connected to the power ground.

7. A motorcycle instrument digital tube control display circuit according to claim 6, characterized in that: The 485 communication circuit includes a 485 communication chip U11, wherein the communication output end of the 485 communication chip U11 is connected to one end of a capacitor C430, one end of a resistor R79 and a 485 communication signal receiving end of the MCU (U16), the other end of the resistor R79 is connected to the SY_5V end of the power module, and the other end of the capacitor C430 is connected to the power ground; the enabling end of the 485 communication chip U11 is connected to one end of a capacitor C429, one end of a resistor R84 and a 485 communication enabling end of the MCU (U16), the other end of the resistor R84 is connected to the SY_5V end of the power module, and the other end of the capacitor C429 is connected to the power ground; the communication input end of the 485 communication chip U11 is connected to one end of a capacitor C428 and a 485 communication signal sending end of the MCU (U16), and the other end of the capacitor C428 is connected to the power ground; the power supply voltage end of the 485 communication chip U11 is connected to one end of a capacitor C82 , one end of capacitor C57 and the SY_5V end of the power module, the other end of capacitor C82 and the other end of capacitor C57 are both connected to the power ground; the output end of the 485 communication chip U11B is connected to the first end of the filter L2, the output end of the 485 communication chip U11A is connected to the second end of the filter L2, the fourth end of the filter L2 is connected to one end of the resistor R83, one end of the resistor R82, one end of the resistor R80 and one end of the resistor R81, and the other end of the resistor R82 is connected to the power ground; the other end of the resistor R80 and the other end of the resistor R81 are both connected to the B end of the RS485 port of the vehicle computer, the third end of the filter L2 is connected to the other end of the resistor R83, one end of the resistor R95, one end of the resistor R85 and one end of the resistor R89, the other end of the resistor R95 is connected to the SY_5V end of the power module, and the other end of the resistor R85 and the other end of the resistor R89 ​​are both connected to the A end of the RS485 port of the vehicle computer.

8. A motorcycle instrument digital tube control and display circuit according to claim 2, characterized in that: It also includes a photosensitive circuit, which includes a positive electrode of a photosensitive element U3 connected to the SY_5V end of a power module, a negative electrode of the photosensitive element U3 connected to one end of a resistor R56, one end of a resistor R55 and one end of a capacitor C26, the other end of the resistor R56 and the other end of the capacitor C26 are both connected to a power ground, and the other end of the resistor R55 is connected to a photosensitive signal input end of the MCU (U16).

9. A motorcycle instrument digital tube control and display circuit according to claim 2, characterized in that: One end of capacitor C23, one end of resistor R44 and the base of transistor Q3, the other end of capacitor C23, the other end of resistor R44 and the emitter of transistor Q3 are all connected to the power ground, the collector of transistor Q3 is connected to one end of resistor R28 and one end of resistor R34, the other end of resistor R28 is connected to the SY_5V end of the power module, the other end of resistor R34 is connected to one end of capacitor C81 and the communication signal receiving end of MCU (U16), and the other end of capacitor C81 is connected to the power ground.

10. A motorcycle instrument digital tube control method, characterized in that: The motorcycle instrument digital tube control display circuit according to any one of claims 1 to 9 further comprises the following steps: S1: Display control; S1-1: Select the type of digital tube; S1-2: Control according to the programmed segment code table; S1-3: The specific characters displayed are controlled by the segment selection pin, and the corresponding digital tubes are displayed according to the bit selection pin; S1-4: Adopt dynamic scanning mode, quickly switch the bit selection signal in sequence, and use the visual persistence effect of the human eye to realize the simultaneous display of multiple digital tubes; S1-5: adjust the duty cycle of the segment selection signal through PWM to control the brightness; S2 performs short circuit detection in real time; S2-1, MCU determines whether it has received a signal to turn on the motorcycle lights: If the MCU does not receive the control signal to turn on the motorcycle lights, it will proceed to the next step; If the MCU receives a control signal to turn on the motorcycle lights, step S2-4 is executed; S2-2, MCU outputs the light-off level to the MCU light control output terminal, so that the transistor Q7 is in the cut-off state; S2-3, the MCU determines whether the short-circuit detection signal received by the MCU headlight short-circuit detection signal terminal is less than or equal to the preset short-circuit voltage value: If the short-circuit detection signal received by the MCU headlight short-circuit detection signal terminal is less than or equal to the preset short-circuit voltage value, it means that the headlight disconnection level output by the MCU to the MCU headlight control output terminal is correct; at this time, the motorcycle headlights are not lit; If the short-circuit detection signal received by the MCU headlight short-circuit detection signal terminal is greater than the preset short-circuit voltage value, it means that the headlight disconnection level output by the MCU to the MCU headlight control output terminal is incorrect and needs to be repaired; S2-4, MCU outputs the light-on level to the MCU light control output terminal, so that the transistor Q7 is in the on state; S2-5, the MCU determines whether the short-circuit detection signal received by the MCU headlight short-circuit detection signal terminal is less than or equal to the preset short-circuit voltage value: If the short-circuit detection signal received by the MCU headlight short-circuit detection signal terminal is less than or equal to the preset short-circuit voltage value, it means that the headlight disconnection level output by the MCU to the MCU headlight control output terminal is incorrect and needs to be repaired; If the short-circuit detection signal received by the MCU headlight short-circuit detection signal terminal is greater than the preset short-circuit voltage value, it means that the headlight disconnection level output by the MCU to the MCU headlight control output terminal is correct; proceed to the next step; S2-6, the MCU determines whether the feedback detection signal received by the MCU headlight output feedback signal input terminal is greater than or equal to the preset feedback voltage value: If the feedback detection signal received by the MCU headlight output feedback signal input terminal is greater than or equal to the preset feedback voltage value, it means that the motorcycle headlight power supply is normal, and the next step is executed; If the feedback detection signal received by the MCU headlight output feedback signal input terminal is less than the preset feedback voltage value, it means that the motorcycle headlight power supply is abnormal and needs to be repaired; S2-7, judging whether the motorcycle lights are on: If the motorcycle lights are on, you can drive on the road with the motorcycle lights on; If the motorcycle lights are not on, it means that the motorcycle lights are damaged and need to be replaced. To detect whether the motorcycle lights are on, a light sensor can be set to detect.

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