Full liquid crystal instrument with multi-road gateway function

Abstract

The utility model relates to a full liquid crystal instrument with a multi-path gateway function, which comprises a main controller, and a multi-path gateway communication circuit, a liquid crystal display circuit, a storage circuit, an output driving circuit, a backlight circuit, a clock circuit and an operation interface which are connected with the main controller, the plurality of CAN communication interfaces are respectively communicated with the plurality of CAN buses, the liquid crystal display circuit is used for displaying relevant information of a vehicle in real time, the storage circuit is used for storing programs of the main controller, icons to be displayed by the liquid crystal display circuit and accumulated mileage of an instrument, and the output driving circuit is connected with other output interfaces except for liquid crystal. The backlight circuit is connected with a constant current source, the constant current source provides constant current for the backlight circuit, the clock circuit adopts a special clock chip to independently supply power, and the operation interface uses a key as a man-machine operation interface.

Description

TECHNICAL FIELD

[0001] The utility model relates to a digital full-color liquid crystal instrument, especially to a CAN bus color liquid crystal instrument with gateway function instead of traditional instrument external gateway module. BACKGROUND

[0002] CAN bus technology is more and more widely used in the design of automobile electronic control unit due to its outstanding advantages. At present, with the rapid development of automobile technology, more and more vehicles require higher and higher self-instrument, not only the function of the instrument is practical, the performance is stable, and also need to connect various vehicle body electrical appliances. At the same time, the reliability, real-time and flexibility of CAN bus data communication are improved. At present, the CAN bus color liquid crystal instrument generally has the following problems:

[0003] 1. The information between multiple CAN buses cannot be exchanged.

[0004] 2. The instrument needs to be connected with gateway module, which is not easy to debug.

[0005] 3. The instrument wiring is difficult and the cost is too high. INVENTION CONTENTS

[0006] The utility model provides a full liquid crystal instrument with multiple gateway functions to solve the technical problems existing in the prior art.

[0007] In order to achieve the above purpose, the utility model provides a full liquid crystal instrument with multiple gateway functions, which comprises a main controller and a plurality of gateway communication circuits, liquid crystal display circuits, storage circuits, output drive circuits, backlight circuits, clock circuits and operation interfaces connected with the main controller,

[0008] The multiple gateway communication circuits have a plurality of CAN communication interfaces, and the plurality of CAN communication interfaces respectively communicate with the plurality of CAN buses,

[0009] The liquid crystal display circuit is used for real-time display of vehicle related information,

[0010] The storage circuit is used for storing the program of the main controller, the icon to be displayed by the liquid crystal display circuit and the cumulative mileage of the instrument,

[0011] The output drive circuit is connected with other output interfaces except liquid crystal,

[0012] The backlight circuit is connected with a constant current source, and the constant current source provides constant current for the backlight circuit,

[0013] The clock circuit adopts a dedicated clock chip for independent power supply,

[0014] The operation interface uses a key as a man-machine operation interface.

[0015] In an embodiment of the utility model, liquid crystal display circuit uses 12.3 inch digital TFT liquid crystal screen.

[0016] In an embodiment of the utility model, other output interface includes loudspeaker.

[0017] In an embodiment of the utility model, main controller is MC9S12XEQ512MAA-T18 chip.

[0018] In an embodiment of the utility model, multiway gateway communication circuit includes CAN bus transceiver TJA1042 and the circuit protector of CAN bus transceiver TJA1042 connection.

[0019] The full liquid crystal instrument with multiway gateway function provided by the utility model uses NXP automobile level chip MC9S12XEQ512MAA, utilizes multiway CAN bus communication, makes the instrument have multiway gateway function, has strong information processing capacity to complete information interaction between each module. Meanwhile, the utility model additionally has video processing, 12.3 inch digital color liquid crystal, loudspeaker, clock and other partial circuits, so that the instrument has more rich display information than traditional color instrument, interface is clear and lifelike and the like. While meeting market demand, also enriches user's use experience. Compared with traditional instrument external gateway module, the utility model increases gateway function in the instrument interior, can greatly reduce cost, and can realize complex logic control through software, greatly simplifies vehicle body wiring, and further improves reliability. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will briefly introduce the drawing needed to be used in embodiment or prior art description, and obviously, the drawing in the following description is only some embodiments of the utility model, and for ordinary skilled person in the art, other drawings can be obtained according to these drawings without paying creative labor.

[0021] Figure 1 It is the structure schematic diagram of the full liquid crystal instrument with multiway gateway function of an embodiment of the utility model;

[0022] Figure 2 It is the principle schematic diagram of multiway gateway communication circuit. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative effort fall within the scope of the present application.

[0024] Figure 1 The structure diagram of the full liquid crystal instrument with the multi-path gateway function in an embodiment of the present application is shown in the figure, Figure 1 The full liquid crystal instrument with the multi-path gateway function provided by the present application comprises a main controller 1, a multi-path gateway communication circuit 2 connected with the main controller 1, a liquid crystal display circuit 3, a storage circuit 4, an output driving circuit 5, a backlight circuit 6, a clock circuit 7 and an operation interface 8,

[0025] The multi-path gateway communication circuit 2 has a plurality of CAN communication interfaces 21, and the plurality of CAN communication interfaces respectively communicate with a plurality of CAN buses 9. In addition, the plurality of CAN communication interfaces can also realize communication with each module. The multi-path gateway communication circuit 2 can realize data exchange of different networks, and the internal network interface matching resistor can be selected by wiring whether to be connected.

[0026] The liquid crystal display circuit 3 is used for displaying vehicle related information in real time,

[0027] The storage circuit 4 is used for storing the program of the main controller, the icons to be displayed by the liquid crystal display circuit 3 and the instrument cumulative mileage,

[0028] The output driving circuit 5 is connected with other output interfaces except liquid crystal,

[0029] The backlight circuit 6 is connected with a constant current source 10. The constant current source 10 provides constant current for the backlight circuit, and is not affected by the change of the vehicle body voltage, thereby improving the stability of the backlight current.

[0030] The clock circuit 7 adopts a special clock chip for independent power supply, so as to ensure accurate time information.

[0031] The operation interface 8 uses a key as a man-machine operation interface, so as to facilitate drivers and other personnel to view and set corresponding information,

[0032] In an embodiment of the present application, the liquid crystal display circuit 3 uses a 12.3-inch digital TFT liquid crystal screen, and various vehicle related information is displayed on the digital TFT liquid crystal screen.

[0033] In an embodiment of the present application, the other output interfaces include a loudspeaker.

[0034] In an embodiment of the utility model, the main controller 1 is MC9S12XEQ512MAA-T18 chip, this is the car level chip that NXP company promoted, has high speed signal processing rate, the chip is with liquid crystal controller and CAN controller, saves the cost, and strengthens stability, improves product quality greatly.

[0035] In an embodiment of the utility model, the multiway gateway communication circuit 2 includes CAN bus transceiver TJA1042 and the circuit protection device connected with CAN bus transceiver TJA1042.

[0036] Figure 2 It is the principle schematic diagram of multiway gateway communication circuit as shown in Figure 2 Figure 2 It is 1 way CAN bus communication circuit in multiway gateway circuit, and multiway gateway circuit is mainly formed by multiple CAN bus transceiver TJA1042 of NXP company, and they are connected to main controller MC9S12XEQ512MAA and receive CAN message information. Figure 2 Two elements V5 and L29 can protect CAN bus transceiver TJA1042. Each CAN bus can receive multiple network nodes, and the number of CAN bus is selected according to actual needs, and combination can realize communication between modules and multiple CAN buses, so as to replace the gateway module connected to the instrument, and achieve the function of gateway.

[0037] The full liquid crystal instrument with multiway gateway function provided by the utility model uses NXP car level chip MC9S12XEQ512MAA, utilizes multiway CAN bus communication, so that the instrument has multiway gateway function, has powerful information processing capacity to complete information interaction with each module. Meanwhile, the utility model additionally has video processing, 12.3 inch digital color liquid crystal, loudspeaker, clock and other partial circuits, so that the instrument has more rich display information than traditional color instrument, interface is clear and lifelike, and the like. While meeting market demand, also enrich the user's use experience. Compared with traditional instrument external gateway module, the utility model increases gateway function in the instrument, can greatly reduce cost, and can realize complex logic control through software, greatly simplifies vehicle body wiring, and further improves reliability.

[0038] Those skilled in the art can understand that: the drawing is only a schematic diagram of an embodiment, and the module or flow in the drawing is not necessarily necessary for implementing the utility model.

[0039] ​Those skilled in the art can understand that the modules in the device in the embodiments can be distributed in the device in the embodiments as described in the embodiments, or can be changed to be located in one or more devices different from the embodiments. The modules in the above embodiments can be combined into one module, or can be further split into multiple sub-modules.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features therein can be replaced by equivalent ones; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A fully LCD instrument with multi-channel gateway function, characterized in that, The application relates to a vehicle information display device, which comprises a main controller and a multi-channel gateway communication circuit, a liquid crystal display circuit, a storage circuit, an output driving circuit, a backlight circuit, a clock circuit and an operation interface connected with the main controller. The multi-channel gateway communication circuit has multiple CAN communication interfaces which respectively communicate with multiple CAN buses. The liquid crystal display circuit is used for displaying vehicle related information in real time. The storage circuit is used for storing the program of the main controller, icons to be displayed by the liquid crystal display circuit and instrument accumulated mileage. The output driving circuit is connected with other output interfaces except the liquid crystal. The backlight circuit is connected with a constant current source which provides constant current for the backlight circuit. The clock circuit adopts a special clock chip and is independently powered. The operation interface uses keys as the man-machine operation interface. The liquid crystal display circuit uses a 12.3-inch digital TFT liquid crystal screen.

2. The all-liquid crystal instrument with multi-path gateway function according to claim 1, characterized in that, The other output interfaces include a loudspeaker.

3. The all-liquid crystal instrument with multi-path gateway function according to claim 1, characterized in that, The main controller is an MC9S12XEQ512MAA-T18 chip.

4. The all-liquid crystal instrument with multi-path gateway function according to claim 1, characterized in that, The multi-channel gateway communication circuit comprises a CAN bus transceiver TJA1042 and circuit protection devices connected with the CAN bus transceiver TJA1042.

5. The all-liquid crystal instrument with multi-path gateway function according to claim 1, characterized in that, ​

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