Colored liquid crystal instrument with CAN (Controller Area Network) awakening function

Abstract

The utility model discloses a color liquid crystal instrument with a CAN (Controller Area Network) awakening function, which comprises a liquid crystal display circuit, an analog quantity acquisition circuit, a CAN bus communication circuit, a power output circuit, a power supply circuit and a main controller, the CAN bus communication circuit comprises a CAN network message transmission module and a CAN control module which are connected with each other, the CAN bus communication circuit is provided with two paths of CAN transceivers, each path of CAN transceiver is respectively connected with one path of CAN bus for communication, one path of CAN transceiver has an awakening function, and the other path of CAN transceiver has an awakening function. And the main controller is connected with the power supply controller, the CAN bus communication circuit, the analog quantity acquisition circuit, the power output circuit and the liquid crystal display circuit.

Description

Technical Field

[0001] This utility model relates to the field of automotive electronics technology, and more specifically, to a color LCD instrument with CAN communication function, power output, analog input and CAN wake-up function. Background Technology

[0002] With the rapid development of automotive CAN bus technology, more and more vehicles are equipped with instrument clusters featuring CAN bus communication capabilities, achieving convenience, flexibility, and reliability in vehicle control. However, current color LCD instrument clusters generally suffer from the following problems:

[0003] 1. There is no sleep / standby mode.

[0004] 2. Unable to wake up and enter normal mode via message. Utility Model Content

[0005] This utility model provides a color LCD instrument with CAN wake-up to solve the technical problems existing in the prior art.

[0006] To achieve the above objectives, this utility model provides a color LCD instrument with CAN wake-up, comprising: an LCD display circuit, an analog signal acquisition circuit, a CAN bus communication circuit, a power output circuit, a power supply circuit, and a main controller, wherein:

[0007] The power supply circuit includes an interconnected power acquisition circuit and a power controller.

[0008] The CAN bus communication circuit includes an interconnected CAN network message transmission module and a CAN control module. The CAN bus communication circuit has two CAN transceivers, each connected to one CAN bus for communication. One of the CAN transceivers has a wake-up function.

[0009] The main controller is connected to the power controller, CAN bus communication circuit, analog signal acquisition circuit, power output circuit, and LCD display circuit.

[0010] In one embodiment of this utility model, the power acquisition circuit includes a 24V power input circuit and a wake-up circuit that are connected to each other.

[0011] In one embodiment of this utility model, the liquid crystal display circuit has a 16-bit color liquid crystal display circuit with adjustable brightness.

[0012] In one embodiment of this utility model, the analog signal acquisition circuit provides 7 independent channels for acquiring analog resistance signals.

[0013] In one embodiment of this utility model, the power output circuit has short-circuit protection and overcurrent protection functions.

[0014] In one embodiment of this utility model, the main controller is a 32-bit microprocessor from GigaDevice, model GD32F470.

[0015] In one embodiment of this utility model, the power acquisition circuit uses a linear power supply.

[0016] The color LCD instrument with CAN wake-up provided by this utility model has the following advantages:

[0017] 1. Without hardwired wake-up, the instrument can be powered by messages to enable it to work normally;

[0018] 2. When the instrument has no hardware wake-up conditions and no wake-up message, the instrument can enter a low-power sleep mode to reduce power consumption;

[0019] 3. The instrument's wake-up message can be configured in advance. Not all messages can wake up the instrument, thus avoiding false wake-ups.

[0020] 4. Special protection has been implemented for the power supply circuit to ensure that the product meets the ISO7637 standard. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of a color LCD instrument with CAN wake-up according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of a CAN bus communication circuit and a wake-up circuit according to an embodiment of the present invention. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Figure 1This is a schematic diagram of the structure of a color LCD instrument with CAN wake-up according to an embodiment of the present invention, as shown below. Figure 1 As shown, this utility model provides a color LCD instrument with CAN wake-up, which includes: an LCD display circuit 1, an analog signal acquisition circuit 2, a CAN bus communication circuit 3, a power output circuit 4, a power supply circuit 5, and a main controller 6, wherein:

[0026] The power supply circuit 5 includes a power acquisition circuit 51 and a power controller 52 that are interconnected.

[0027] Figure 2 This is a schematic diagram of a CAN bus communication circuit and a wake-up circuit according to an embodiment of the present invention, as shown below. Figure 2 As shown, the CAN bus communication circuit 3 includes an interconnected CAN network message transmission module and a CAN control module (e.g., a JTA1145 chip). The CAN network message transmission module is used to transmit messages containing various information data. When the message is a wake-up message, it can wake up the instrument; when the message contains a sleep or standby command, it can control the instrument to enter sleep or standby mode. The CAN bus communication circuit 3 has two CAN transceivers, each connected to one CAN bus for communication. Figure 2 (The image shows one of the channels), one of which has a CAN transceiver with a wake-up function.

[0028] The main controller 6 is connected to the power controller 52, the CAN bus communication circuit 3, the analog signal acquisition circuit 2, the power output circuit 4, and the LCD display circuit 1.

[0029] like Figure 2 As shown, in one embodiment of this utility model, the power acquisition circuit includes a 24V power input circuit and a wake-up circuit that are connected to each other.

[0030] In one embodiment of this utility model, the liquid crystal display circuit 1 has a 16-bit color liquid crystal display circuit with adjustable brightness.

[0031] In one embodiment of this utility model, the analog signal acquisition circuit 2 provides 7 independent analog resistance signal acquisition channels.

[0032] In one embodiment of this utility model, the power output circuit 4 has short-circuit protection and overcurrent protection functions.

[0033] In one embodiment of this utility model, the main controller 6 is a 32-bit microprocessor from GigaDevice, model GD32F470.

[0034] In one embodiment of this utility model, the power acquisition circuit 51 uses a linear power supply.

[0035] The color LCD instrument with CAN wake-up provided by this utility model has the following advantages:

[0036] 1. Without hardwired wake-up, the instrument can be powered by messages to enable it to work normally;

[0037] 2. When the instrument has no hardware wake-up conditions and no wake-up message, the instrument can enter a low-power sleep mode to reduce power consumption;

[0038] 3. The instrument's wake-up message can be configured in advance. Not all messages can wake up the instrument, thus avoiding false wake-ups.

[0039] 4. Special protection has been implemented for the power supply circuit to ensure that the product meets the ISO7637 standard.

[0040] Those skilled in the art will understand that the accompanying drawings are merely schematic diagrams of one embodiment, and the modules or processes shown in the drawings are not necessarily essential for implementing this utility model.

[0041] Those skilled in the art will understand that the modules in the apparatus of the embodiments can be distributed in the apparatus of the embodiments as described in the embodiments, or they can be located in one or more devices different from this embodiment with corresponding changes. The modules of the above embodiments can be combined into one module, or they can be further divided into multiple sub-modules.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A color LCD instrument with CAN wake-up function, characterized in that, include: The circuit includes an LCD display circuit, an analog signal acquisition circuit, a CAN bus communication circuit, a power output circuit, a power supply circuit, and a main controller, among which: The power supply circuit includes an interconnected power acquisition circuit and a power controller. The CAN bus communication circuit includes an interconnected CAN network message transmission module and a CAN control module. The CAN bus communication circuit has two CAN transceivers, each connected to one CAN bus for communication. One of the CAN transceivers has a wake-up function. The main controller is connected to the power controller, CAN bus communication circuit, analog signal acquisition circuit, power output circuit, and LCD display circuit.

2. The color LCD instrument with CAN wake-up according to claim 1, characterized in that, The power acquisition circuit includes an interconnected 24V power input circuit and a wake-up circuit.

3. The color LCD instrument with CAN wake-up according to claim 1, characterized in that, The liquid crystal display circuit has a 16-bit color liquid crystal display circuit with adjustable brightness.

4. The color LCD instrument with CAN wake-up according to claim 1, characterized in that, The analog signal acquisition circuit provides 7 independent channels for acquiring analog resistance signals.

5. The color LCD instrument with CAN wake-up according to claim 1, characterized in that, The power output circuit has short-circuit protection and overcurrent protection functions.

6. The color LCD instrument with CAN wake-up according to claim 1, characterized in that, The main controller is a 32-bit microprocessor from GigaDevice, model GD32F470.

7. The color LCD instrument with CAN wake-up according to claim 1, characterized in that, The power acquisition circuit uses a linear power supply.

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