Multifunctional digital integrated instrument system

Abstract

The invention relates to the technical field of instruments and meters, and discloses a multifunctional digital integrated instrument system which comprises a broken code screen display device connected with an automobile main power supply, the broken code screen display device comprises a display structure and a circuit board structure, the circuit board structure comprises two glass substrates, a circuit structure is etched between the two glass substrates, and the display structure is connected with the display structure. Through the control logic of the control circuit, the light path is displayed through passing and shielding. The circuit structure comprises a Bluetooth module, a radio module and a CAN communication module; according to the invention, the Bluetooth module and the radio module are integrated, the integration level and the stability of the instrument are improved, the use of a stepping motor is reduced, the weight of the instrument is greatly reduced, the use of a liquid crystal display screen is reduced, and the cost and the energy consumption are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of integrated instruments, and in particular to a multifunctional digital integrated instrument system. Background Art

[0002] In the current field of commercial vehicle combination instruments, a variety of technologies are widely used to display vehicle speed, speed and other gauge information. Among them, stepper motor control technology is a common method, which uses a stepper motor to drive the rotation of the pointer to accurately indicate the corresponding speed or speed value. In addition, the existing display method often combines the use of ordinary LEDs as backlight sources, and alarms are displayed by silk-screening patterns on the surface to enhance the clarity and readability of the display effect.

[0003] However, due to the presence of the stepper motor and pointer mechanism, the entire instrument device is relatively large and heavy, which to a certain extent limits the development demand for miniaturization and lightweighting of the instrument. Secondly, although ordinary LED backlights can improve the display effect to a certain extent, their power consumption and cost are relatively high, and it is difficult to achieve more complex display functions.

[0004] As a result, the industry began to try to use liquid crystal displays (LCDs) as an alternative. LCDs have the advantages of small size, light weight, low power consumption, and rich display content, making the instrumentation thinner and lighter, and more in line with modern development needs. However, the price of LCDs is relatively high, which increases the cost of the instrumentation to a certain extent. In addition, since the integration of LCDs is difficult, professional technical support and complex production processes are required, which also limits their widespread application in commercial vehicle combination instruments.

[0005] In addition, although modern car instrument clusters are already able to display basic information such as vehicle speed and RPM, most instruments can only provide simple displays for entertainment functions such as radio and Bluetooth, and are unable to directly implement these functions. External devices are usually required to complete these functions, which not only increases costs, but also reduces the integration of the entire vehicle's internal system, which is not conducive to improving the performance and reliability of the vehicle. Summary of the invention

[0006] The present invention is intended to provide a multifunctional digital integrated instrument system to solve the problems in the prior art of large volume, high weight, high manufacturing cost and great integration difficulty of automobile instruments.

[0007] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a multifunctional digital integrated instrument system. This scheme uses the entire screen to display the alarm indicator light, reduces the use of stepper motors, greatly reduces the weight of the instrument, and reduces the use of liquid crystal display screens, reducing costs and energy consumption. On the basis of ensuring the display function of the instrument, Bluetooth and radio modules are integrated to improve the integration and stability of the instrument. The system includes a broken code screen display device connected to the main power supply of the car, the broken code screen display device includes a display structure and a circuit board structure, the circuit board structure includes two glass substrates, and a circuit structure is etched between the two glass substrates. By controlling the on and off of the circuit, the light path is displayed by passing and blocking; the circuit structure includes a Bluetooth module, a radio module and a CAN communication module; it has low voltage, overvoltage, and power consumption reduction protection functions.

[0008] The principles and advantages of this solution are:

[0009] At present, in order to meet the needs of lightweight and miniaturized automobile instruments, liquid crystal displays are usually used for instrument displays to meet the diverse display effects. However, due to the difficulty of the process and high integration complexity of liquid crystal displays, it is difficult to further diversify the applications based on liquid crystal displays, resulting in the existing car Bluetooth and radio functions still being implemented through external devices, and it is difficult to effectively integrate Bluetooth, radio and liquid crystal displays. In addition, the price of liquid crystal displays is expensive, which further limits the application of liquid crystal displays, resulting in the large space occupied by the entertainment function devices of the car, increasing the corresponding weight, and also bringing about the energy consumption of the car.

[0010] However, this solution designs a new broken code screen, etches the circuit between two glass substrates, and realizes the display function by controlling the on and off of the circuit to achieve the passage and shielding of light. For the part that needs color display, the corresponding color is applied to the pattern through silk screen printing technology to achieve the required display effect, and no longer needs to use LCD screen for display, thus jumping out of the limitations of LCD screens, breaking through the technical difficulties of LCD screens, and realizing the integration of instruments and entertainment devices, greatly reducing the difficulty of integration and production costs.

[0011] In addition, this solution uses the entire screen to display the alarm indicator light, thereby reducing the use of stepper motors, greatly reducing the weight of the instrument, making it cheaper and performing better in extreme environments. At the same time, this solution integrates Bluetooth modules and radio modules on the basis of ensuring the display function of the instrument, so that the Bluetooth and radio functions are no longer required through external devices. While improving the degree of integration, it reduces the size of the instrument, allowing it to realize multiple functions on one component, thereby reducing the status of components and improving the stability and consistency of the instrument.

[0012] Furthermore, the display structure includes a display screen, on which a corresponding color pattern is provided.

[0013] Furthermore, a backlight lamp bead is provided on the PCB on the back of the broken code screen, and the display brightness of the backlight lamp bead is controlled by control logic. The backlight lamp bead at the corresponding position can be controlled to display by directly powering on, thereby replacing the use of the LCD screen, reducing costs while ensuring the display effect.

[0014] Furthermore, the circuit structure includes a microcontroller, and the microcontroller receives and sends data through a CAN transceiver; the microcontroller sends instructions to the display structure through a segment driver.

[0015] Furthermore, the Bluetooth module is communicatively connected with the microcontroller via an asynchronous receiver / transmitter.

[0016] Furthermore, the radio module is communicatively connected to the Bluetooth module via an audio input line.

[0017] Furthermore, a first voltage stabilizer is provided between the power input terminal of the microcontroller and the output terminal of the main power supply of the car; a current converter is provided between the output pin of the microcontroller and the main power supply of the car; the input terminal of the Bluetooth module is connected to the output terminal of the current converter; the output terminal of the current converter is also connected to the second voltage stabilizer, and the output terminal of the second voltage stabilizer is connected to the input terminal of the radio module.

[0018] Furthermore, the CAN communication module is connected to the main power supply of the car through high and low level lines; wherein, the CAN communication module includes a CAN transceiver, the TXD pin of the CAN transceiver is connected to CAN_TXD, and the RXD pin of the CAN transceiver is connected to CAN_RXD; the STBY pin of the CAN transceiver is connected in series with a resistor R19 and grounded; the CAN_H pin of the CAN transceiver is connected in series with a group of first resistors and then connected to the high level line; the CAN_L pin of the CAN transceiver is connected in series with a second resistor and then connected to the low level line, the series resistor matches the CAN bus impedance, and D4 is connected in parallel to prevent electrostatic input; the VIO pin of the CAN transceiver is connected to the CAN_3V3 power supply terminal, and is connected in parallel with a capacitor C31 and then grounded.

[0019] Furthermore, the circuit board structure includes a cable connector; the second pin of the cable connector is connected to the LCD_RST interface; the third pin is connected to the LCD_SCLK interface; the fourth pin is connected to the LCD_SDI interface; the fifth pin is connected to the LCD_SS interface; the sixth pin is connected to the main power supply and serves as a driving voltage pin of the display structure, a chip bead is connected to the output end of the sixth pin, a capacitor C394 is connected to the other end of the chip bead, and the other end of the capacitor C394 is grounded; the seventh pin and the tenth pin of the cable connector are connected in parallel and grounded; the eighth pin is a positive power connection pin; the ninth pin is connected to capacitor C393 and grounded.

[0020] Furthermore, a resistor R22 is connected to the output end of the first resistor, a capacitor C32 and a resistor R23 are connected in parallel to the other end of the resistor R22, the other end of the capacitor C32 is grounded, and the other end of the resistor R23 is connected to the low level line. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The present invention is a principle block diagram of a multifunctional digital integrated instrument system.

[0022] Figure 2 The present invention is a circuit structure diagram of a CAN transceiver in a circuit board structure of a multifunctional digital integrated instrument system.

[0023] Figure 3 The present invention is a circuit structure diagram of a cable connector in a circuit board structure of a multifunctional digital integrated instrument system.

[0024] Figure 4 The present invention is a display structure diagram of a multifunctional digital integrated instrument system display screen. DETAILED DESCRIPTION

[0025] The following is further described in detail through specific implementation methods:

[0026] The reference numerals in the drawings of the specification include: microcontroller 1, CAN transceiver 2, car main power supply 3, segment driver 4, display structure 5, Bluetooth module 6, radio module 7, first voltage regulator 8, current converter 9, second voltage regulator 10, memory 11, audio amplifier 12, backlight module 13, cable connector 14.

[0027] Embodiment 1

[0028] This embodiment is basically as shown in the attached Figure 1As shown, a multifunctional digital integrated instrument system integrates Bluetooth and radio modules on the basis of ensuring the instrument display function, so that multiple functions can be realized on one component, reducing the component status, higher integration, and improved stability and consistency. The system includes a broken code screen display device connected to the main power supply of the car, and the broken code screen display device includes a display structure and a circuit board structure. In this embodiment, the circuit board structure includes two glass substrates, and a circuit structure is etched between the two glass substrates. By controlling the on and off of the circuit, the passage and shielding of the light path are realized, thereby realizing the display function.

[0029] Among them, the display structure includes a display screen, and a corresponding color pattern is provided on the display screen. That is, for the part that needs color display, in this embodiment, the corresponding color is applied to the pattern through silk screen printing technology to achieve the required display effect, thereby reducing the use of LCD screens and reducing production costs, and it performs better in extreme environments.

[0030] At the same time, backlight beads are mounted on the PCB on the back of the broken code screen, that is, a circuit is engraved on the glass substrate, and backlight beads are arranged on the back of the circuit. The specific number of backlight beads can be set according to specific usage requirements, and the glass substrate used can also meet the layout requirements of the backlight beads. By arranging more backlight beads, the display effect of the instrument in places with strong light is enhanced. At the same time, the display brightness of the backlight beads is controlled by control logic, that is, by controlling the number of some backlight beads that are turned off, a soft display effect can be achieved in a dark state, thereby replacing the LCD screen to meet the display requirements.

[0031] The circuit structure includes an integrated Bluetooth module, a radio module and a CAN communication module. In this embodiment, by independently dividing the area on the circuit board, etching the Bluetooth module, the radio module and the CAN communication module respectively, the electromagnetic compatibility problem of the outside world is avoided, the integration stability is improved, and the working state of the instrument is ensured. In this embodiment, the CAN communication module adopts a CAN transceiver 2.

[0032] In this embodiment, as shown in the attached Figure 1 As shown, the circuit structure includes a microcontroller 1, which communicates with the data of the main power supply 3 of the car through the CAN transceiver 2. The microcontroller 1 sends instructions to the display structure 5 through the segment driver 4 to realize the display function. The Bluetooth module 6 communicates with the microcontroller 1 through an asynchronous receiver-transmitter (UART), and the radio module 7 communicates with the Bluetooth module 6 through an audio input line (Line In).

[0033] Specifically, a first voltage regulator 8 is provided between the power input terminal of the microcontroller 1 and the output terminal of the vehicle main power supply 3. The positive power pole of the vehicle main power supply 3 is connected to the input terminal of the first voltage regulator 8. The first voltage regulator 8 converts the vehicle main power supply 3 into a 3.3V power supply and inputs it into the microcontroller 1.

[0034] A current converter 9 is also provided between the output pin of the microcontroller 1 and the main power supply 3 of the car. The output pin of the microcontroller 1 is connected to one input end of the current converter 9, and the positive power supply of the main power supply 3 of the car is connected to the other input end of the current converter 9. The current converter 9 converts the power output of the main power supply 3 of the car into a 5V power supply, and connects it to the Bluetooth module 6, so that the input end of the Bluetooth module 6 is connected to the output end of the current converter 9. The output end of the Bluetooth module 6 is also connected to an audio amplifier 12 through a digital-to-analog converter, so as to adjust Bluetooth communication and audio-related parameters to realize the Bluetooth function.

[0035] At the same time, the output end of the current converter 9 is also connected to the second voltage regulator 10, and the output end of the second voltage regulator 10 is connected to the input end of the radio module 7, so that the current passing through the second voltage regulator 10 is converted into 3.3V and then connected to the radio module 7. The radio module 7 is externally connected to the FM radio to realize the radio broadcasting function.

[0036] A memory 11 is also provided at one output end of the microcontroller 1, and data storage and reading are realized through the memory 11. Another output end of the microcontroller 1 is connected to the input end of the segment driver 4, and the output end of the segment driver 4 is connected to the input end of the display structure 5, and the display function is realized by sending instructions or data to the display structure 5 through the segment driver 4.

[0037] A backlight module 13 is also connected to the output end of the enable pin of the microcontroller 1. The output end of the backlight module 13 is connected to the input end of the display structure 5. By turning on or off the backlight module 13, the display effect under different light intensity conditions is achieved. In this embodiment, the backlight module 13 is a backlight lamp bead.

[0038] In this embodiment, the CAN communication module is connected to the main power supply 3 of the vehicle through high and low level lines. The connection circuit diagram of the CAN communication module, i.e., the CAN transceiver 2, is shown in the attached figure. Figure 2As shown, in this embodiment, the CAN transceiver 2 adopts a high-speed transceiver chip of model TJA1042T / 3, and the TXD pin of the chip is connected to CAN_TXD to realize the transmission of CAN data between the microcontroller 1 and the main power supply 3 of the car. The RXD pin of the CAN transceiver 2 is connected to CAN_RXD to realize the reception and transmission of CAN data between the microcontroller 1 and the main power supply 3 of the car. The GND pin of the CAN transceiver 2 is grounded, and the VCC pin of the CAN transceiver 2 is connected to the power supply end, wherein the VCC pin is connected in parallel with capacitor C28 and capacitor C27 and then grounded, and the other end of capacitor C27 is connected to the 5V power supply.

[0039] The STBY pin of the CAN transceiver 2 is connected in series with a resistor R19 and grounded. The CAN_H pin of the CAN transceiver is connected in series with a group of first resistors and then connected to the high level line. Among them, the first resistor is a 0Ω resistor, specifically including a resistor R20 and a first resistor R0603, one end of the resistor R20 is connected to the CAN_H pin, and the other end is connected to one end of the first resistor R0603, and the other end of the first resistor R0603 is connected to the CAN_H pin. One end of the first resistor R0603 is connected to the high level line.

[0040] The CAN_L pin of the CAN transceiver is connected in series with a second resistor and then connected to the low level line, wherein the second resistor is a 0Ω resistor, specifically including a resistor R21 and a second resistor R0603, one end of the resistor R21 is connected to the CAN_L pin, and the other end is connected to one end of the second resistor R0603, and the other end of the second resistor R0603 is connected to the CAN_L pin. One end of the second resistor R0603 is connected to the low level line.

[0041] The VIO pin of the CAN transceiver is connected to the CAN_3V3 power supply terminal, and is connected to ground after being connected in parallel with capacitor C31.

[0042] A resistor R22 is also connected to the output end of the first resistor, a capacitor C32 and a resistor R23 are connected in parallel to the other end of the resistor R22, the other end of the capacitor C32 is grounded, and the other end of the resistor R23 is connected to the low level line.

[0043] A capacitor C29 is also connected to the high level line, the other end of the capacitor C29 is connected in series to one end of a capacitor C30, one end of the capacitor C30 is grounded, and the other end is connected to the low level line.

[0044] A static discharge protection device is also connected between the high level line and the low level line, and the other end of the static discharge protection device is grounded. In this embodiment, a series resistor is used to match the CAN bus impedance, and D4 is connected in parallel to prevent static input, that is, to match the electrostatic breakdown diode to avoid damage when the voltage is too high, so as to protect the circuit safety and stability.

[0045] The circuit board structure includes a cable connector 14. In this embodiment, the cable connector 14 can be a surface mount flexible circuit board of model FPC_SMD_10P. Figure 3 As shown, the second pin of the cable connector is connected to the LCD_RST interface; the third pin is connected to the LCD_SCLK interface; the fourth pin is connected to the LCD_SDI interface; and the fifth pin is connected to the LCD_SS interface.

[0046] The sixth pin is connected to the 5V main power supply as the driving voltage pin of the display structure. A patch bead is connected to the output end of the sixth pin. In this embodiment, the patch bead can be a patch bead of model BLM18EG601SN1. A capacitor C394 is connected to the other end of the patch bead, and the other end of the capacitor C394 is grounded.

[0047] The seventh pin and the tenth pin of the cable connector 14 are connected in parallel and then grounded; the eighth pin is a 3.3V positive power connection pin; the ninth pin is connected to the capacitor C393 and grounded, and the eleventh pin and the twelfth pin are grounded respectively.

[0048] After integration, the overall display status of the display is as shown in the attached Figure 4 As shown, the alarm indicator light is displayed through the entire screen, and the Bluetooth module 6 and the radio module 7 are respectively integrated in the divided display screen areas, and multiple functions can be realized on one component through an orderly line layout, thereby reducing the component status and improving the integration, stability and consistency of the instrument.

[0049] In this solution, the entire screen is used to display the alarm indicator light, thereby reducing the use of stepper motors and greatly reducing the weight of the instrument. Compared with traditional LCD screens, the use of liquid crystals is also reduced, making it cheaper and performing better in extreme environments. At the same time, this solution integrates Bluetooth modules and radio modules on the basis of ensuring the display function of the instrument, so that the Bluetooth function and radio function are no longer required through external devices. While improving the integration, the volume of the instrument is reduced, so that multiple functions can be realized on one component, so as to reduce the status of components and improve the stability and consistency of the instrument.

[0050] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A multifunctional digital integrated instrument system, characterized in that: The invention comprises a broken code screen display device connected to the main power supply of the automobile, the broken code screen display device comprises a display structure and a circuit board structure, the circuit board structure comprises two glass substrates, a circuit structure is etched between the two glass substrates, and the display is realized by passing and blocking the light path through the control logic of the control circuit; the circuit structure comprises a Bluetooth module, a radio module and a CAN communication module.

2. A multifunctional digital integrated instrument system according to claim 1, characterized in that: The display structure comprises a display screen, on which a corresponding color pattern is arranged.

3. A multifunctional digital integrated instrument system according to claim 1, characterized in that: Backlight lamp beads are arranged on the PCB at the back of the broken code screen, and the display brightness of the backlight lamp beads is controlled by control logic.

4. A multifunctional digital integrated instrument system according to claim 1, characterized in that: The circuit structure includes a microcontroller, and the microcontroller receives and sends data through a CAN communication module; the microcontroller sends instructions to the display structure through a segment driver.

5. A multifunctional digital integrated instrument system according to claim 4, characterized in that: The Bluetooth module is connected to the microcontroller for communication via an asynchronous receiver-transmitter.

6. A multifunctional digital integrated instrument system according to claim 5, characterized in that: The radio module is communicatively connected with the Bluetooth module via an audio input line.

7. A multifunctional digital integrated instrument system according to claim 6, characterized in that: A first voltage stabilizer is provided between the power input terminal of the microcontroller and the output terminal of the main power supply of the car; a current converter is provided between the output pin of the microcontroller and the main power supply of the car; the input terminal of the Bluetooth module is connected to the output terminal of the current converter; the output terminal of the current converter is also connected to the second voltage stabilizer, and the output terminal of the second voltage stabilizer is connected to the input terminal of the radio module.

8. A multifunctional digital integrated instrument system according to claim 4, characterized in that: The CAN communication module is connected to the main power supply of the car through high and low level lines; wherein the CAN communication module includes a CAN transceiver, the TXD pin of the CAN transceiver is connected to CAN_TXD, and the RXD pin of the CAN transceiver is connected to CAN_RXD; the STBY pin of the CAN transceiver is connected in series with a resistor R19 and grounded; the CAN_H pin of the CAN transceiver is connected in series with a group of first resistors and then connected to the high level line; the CAN_L pin of the CAN transceiver is connected in series with a second resistor and then connected to the low level line, the series resistor matches the CAN bus impedance, and D4 is connected in parallel to prevent static electricity input; the VIO pin of the CAN transceiver is connected to the CAN_3V3 power supply terminal, and is connected in parallel with a capacitor C31 and then grounded.

9. The multifunctional digital integrated instrument system according to claim 1, characterized in that: The circuit board structure includes a cable connector; the second pin of the cable connector is connected to the LCD_RST interface; the third pin is connected to the LCD_SCLK interface; the fourth pin is connected to the LCD_SDI interface; the fifth pin is connected to the LCD_SS interface; the sixth pin is connected to the main power supply and serves as a driving voltage pin of the display structure, a chip bead is connected to the output end of the sixth pin, a capacitor C394 is connected to the other end of the chip bead, and the other end of the capacitor C394 is grounded; the seventh pin and the tenth pin of the cable connector are connected in parallel and grounded; the eighth pin is a positive power connection pin; the ninth pin is connected to the capacitor C393 and grounded.

10. The multifunctional digital integrated instrument system according to claim 8, characterized in that: A resistor R22 is also connected to the output end of the first resistor, a capacitor C32 and a resistor R23 are connected in parallel to the other end of the resistor R22, the other end of the capacitor C32 is grounded, and the other end of the resistor R23 is connected to the low level line.

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