CN111619344B - Liquid crystal instrument display system, method and storage medium - Google Patents
Liquid crystal instrument display system, method and storage medium Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
- B60K35/20—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
- B60K35/21—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor using visual output, e.g. blinking lights or matrix displays
- B60K35/22—Display screens
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
- B60K35/20—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
- B60K35/28—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor characterised by the type of the output information, e.g. video entertainment or vehicle dynamics information; characterised by the purpose of the output information, e.g. for attracting the attention of the driver
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
- B60R16/0231—Circuits relating to the driving or the functioning of the vehicle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
- B60K2360/16—Type of output information
- B60K2360/167—Vehicle dynamics information
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Abstract
The application discloses a liquid crystal instrument display system, a method and a storage medium, wherein the liquid crystal instrument display system comprises a Controller Area Network (CAN) bus, a single chip microcomputer, a control chip, a timing controller, a liquid crystal communication Liquid Crystal Module (LCM) module and an external memory, wherein the Controller Area Network (CAN) bus, the single chip microcomputer, the control chip, the timing controller and the liquid crystal communication LCM module are sequentially in communication connection; the CAN bus is used for acquiring automobile operation parameters of an externally connected vehicle-mounted system; the singlechip is in communication connection with the timing controller and is used for transmitting the written character command to the timing controller when the control chip fails; the timing controller is used for downloading character information from an external memory after receiving a character writing instruction; the single chip microcomputer is also used for transmitting the automobile operation parameters to the timing controller when the timing controller downloads the character information from the external memory; and the timing controller is also used for generating a first driving signal to drive the LCM according to the character information and the automobile operation parameters. The method and the device for displaying the automobile running parameters have the advantage that the automobile running parameters can be displayed when the liquid crystal instrument fails.
Description
Technical Field
The present application relates to the field of meter display technologies, and in particular, to a liquid crystal meter display system, method, and storage medium.
Background
At present, the traditional instrument can not meet the development requirements of automobile intellectualization and electromotion, and the liquid crystal instrument can display key information related to driving such as endurance mileage, battery capacity, driving assistance function, navigation and the like, and can form friendly interaction with a user to gradually replace the traditional instrument. Meanwhile, as a main information output port in the vehicle, the liquid crystal instrument will cooperate with other display components to realize the development trend of multi-screen fusion in the future.
Although the integrated information of the existing liquid crystal instrument is more comprehensive and more intelligent, the liquid crystal instrument has the defect of being not negligible, the whole liquid crystal instrument comprises configuration elements such as a CPU (central processing unit), an electronic screen and the like, and when the configuration elements are abnormal, the phenomenon that the liquid crystal instrument is black and crashed can be caused; different from the mechanical instrument, the functional displays of the liquid crystal instrument are relatively independent, and the functional displays of the liquid crystal instrument are mutually influenced, namely when the power supply of the liquid crystal instrument or the video signal fails, all information on the liquid crystal instrument can not be displayed, and the life safety of a driver can be seriously threatened.
Disclosure of Invention
The application mainly aims to provide a liquid crystal instrument display system, a liquid crystal instrument display method and a storage medium, and aims to solve the technical problem that in the prior art, when a liquid crystal instrument fails, the operating parameters of an automobile cannot be displayed.
In order to achieve the above object, an embodiment of the present application provides a liquid crystal instrument display system, where the liquid crystal instrument display system includes a controller area network CAN bus, a single chip, a control chip, a timing controller, a liquid crystal communication LCM module, and an external memory, which are sequentially in communication connection with each other;
the CAN bus is used for acquiring automobile operation parameters of an externally connected vehicle-mounted system;
the single chip microcomputer is in communication connection with the timing controller and is used for transmitting a character writing instruction to the timing controller when the control chip fails;
the timing controller is used for downloading character information from the external memory after receiving the character writing instruction;
the single chip microcomputer is also used for transmitting the automobile operation parameters to the timing controller when the timing controller downloads character information from the external memory;
the timing controller is further used for generating a first driving signal to drive the LCM according to the character information and the automobile operation parameters.
Optionally, the timing controller includes an OSD chip for displaying screen characters, and the OSD chip is respectively in communication connection with the single chip microcomputer and the external memory based on a serial peripheral interface SPI;
the single chip microcomputer is used for transmitting a character writing instruction to the OSD chip when the control chip fails;
the OSD chip is used for downloading character information from the external memory after receiving the character writing instruction;
the single chip microcomputer is also used for transmitting the automobile operation parameters to the OSD chip when the OSD chip downloads character information from the external memory.
Optionally, the single chip microcomputer is further configured to detect whether the control chip has a fault.
Optionally, the control chip includes a main control chip or a pass-through chip.
Optionally, the single chip microcomputer is further configured to obtain the vehicle operating parameters from the CAN bus in a Universal Asynchronous Receiver Transmitter (UART) mode when the control chip works normally;
the single chip microcomputer is also used for transmitting the automobile operation parameters to the control chip in an I2C mode.
Optionally, the control chip is configured to process the vehicle operation parameter and output a video signal to the timing controller;
the timing controller is further used for processing the video signal to generate a second driving signal to drive the LCM.
The application also provides a liquid crystal instrument display method which is applied to a liquid crystal instrument display system, wherein the liquid crystal instrument display system comprises a CAN bus, a single chip microcomputer, a control chip, a timing controller, a liquid crystal communication LCM module and an external memory, the CAN bus, the single chip microcomputer, the control chip, the timing controller and the liquid crystal communication LCM module are sequentially in communication connection, the external memory is in communication connection with the timing controller, and the single chip microcomputer is synchronously in communication connection with the timing controller;
the liquid crystal instrument display method comprises the following steps:
judging whether a control chip in the liquid crystal instrument has a fault or not;
when the control chip breaks down, a first driving signal is output to drive the LCM based on the single chip microcomputer, the external memory and the timing controller.
Optionally, the step of determining whether the control chip in the liquid crystal instrument fails includes:
acquiring communication data of the single chip microcomputer and the control chip;
comparing the communication data with preset standard data;
when the communication data is inconsistent with the preset standard data, judging that the control chip has a fault;
and when the communication data is consistent with the preset standard data, judging that the control chip works normally.
Optionally, when the control chip fails, the step of outputting a first driving signal to drive the LCM module based on the single chip, the external memory, and the timing controller includes:
acquiring a write-in character instruction output by the singlechip, and transmitting the write-in character instruction to the timing controller;
after receiving the character writing instruction, downloading character information from the external memory to the timing controller;
acquiring automobile operation parameters output by the singlechip, and transmitting the automobile operation parameters to the timing controller;
and acquiring a first driving signal output by the timing controller based on the character information and the automobile running parameters, and driving the LCM based on the first driving signal.
The present application further provides a computer storage medium having a liquid crystal meter display program stored thereon, which when executed by a processor, performs the steps of the liquid crystal meter display method described above.
The application discloses a liquid crystal instrument display system, a method and a storage medium, wherein the liquid crystal instrument display system comprises a Controller Area Network (CAN) bus, a single chip microcomputer, a control chip, a timing controller, a liquid crystal communication Liquid Crystal Module (LCM) and an external memory, wherein the Controller Area Network (CAN) bus, the single chip microcomputer, the control chip, the timing controller and the liquid crystal communication LCM are sequentially in communication connection; the CAN bus is used for acquiring automobile operation parameters of an externally connected vehicle-mounted system; the single chip microcomputer is in communication connection with the timing controller and is used for transmitting a character writing instruction to the timing controller when the control chip fails; the timing controller is used for downloading character information from the external memory after receiving the character writing instruction; the single chip microcomputer is also used for transmitting the automobile operation parameters to the timing controller when the timing controller downloads character information from the external memory; the timing controller is further used for generating a first driving signal to drive the LCM according to the character information and the automobile operation parameters. This application draws out the independent design with the timing controller on the LCM module (timing controller does not integrate inside the LCM module), the communication of external memory and singlechip and timing controller has been increased simultaneously, therefore, this application is when the liquid crystal instrument breaks down, need not transmit car operating parameter to OSD chip through control chip, but by the singlechip will write in character instruction and car operating parameter transmission to OSD chip, the OSD chip downloads the character and handles character and car operating parameter from external memory, then form first drive signal drive LCM module, thereby can show car operating parameter when having realized the liquid crystal instrument trouble.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
Fig. 1 is a schematic diagram of a hardware structure of an alternative system according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a circuit framework of a liquid crystal instrument display system according to the present application;
FIG. 3 is a schematic flow chart of a first embodiment of a display method of a liquid crystal instrument according to the present application;
FIG. 4 is a schematic flow chart illustrating a third exemplary embodiment of a display method of a liquid crystal display device according to the present application;
FIG. 5 is a schematic diagram of functional modules of a display device of the liquid crystal instrument according to the present application;
FIG. 6 is a schematic view of another circuit framework of the LCD instrument display system of the present application;
FIG. 7 is a schematic view of an interface of a vehicle-mounted system when a main control chip of the liquid crystal instrument of the present application is normal;
fig. 8 is a schematic view of an interface of a vehicle-mounted system when a main control chip of the liquid crystal instrument fails.
The implementation, functional features and advantages of the objectives of the present application will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In the following description, suffixes such as "module", "component", or "unit" used to denote elements are used only for the convenience of description of the present application, and have no specific meaning by themselves. Thus, "module", "component" or "unit" may be used mixedly.
As shown in fig. 1, fig. 1 is a schematic structural diagram of a robot in a hardware operating environment according to an embodiment of the present application.
As shown in fig. 1, the structural design of the liquid crystal instrument display system includes nodes and servers, and the device structure thereof may include: a processor 1001, such as a CPU, a memory 1005, and a communication bus 1002. The communication bus 1002 is used for realizing connection communication between the processor 1001 and the memory 1005. The memory 1005 may be a high-speed RAM memory or a non-volatile memory (e.g., a magnetic disk memory). The memory 1005 may alternatively be a storage device separate from the processor 1001.
Optionally, the lcd instrument display system may further include a user interface, a network interface, a camera, an RF (Radio Frequency) circuit, a sensor, an audio circuit, a WiFi module, and the like. The user interface may include a Display screen (Display), touch screen, camera (including AR/VR devices), etc., and the optional user interface may also include a standard wired interface, a wireless interface. The network interface may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface, bluetooth interface, probe interface, 3G/4G/5G networking communication interface, etc.).
Those skilled in the art will appreciate that the configuration of the liquid crystal meter display system shown in fig. 1 does not constitute a limitation of the liquid crystal meter display system and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a kind of computer storage medium, may include therein an operating system, a network communication module, and a liquid crystal meter display program. The operating system is a program for managing and controlling hardware and software resources of the liquid crystal instrument display system, and supports the operation of the liquid crystal instrument display program and other software and/or programs. The network communication module is used for realizing communication among the components in the memory 1005 and communication with other hardware and software in the liquid crystal instrument display system.
In the liquid crystal meter display system shown in fig. 1, the processor 1001 is configured to execute a liquid crystal meter display program stored in the memory 1005, and implement the following steps:
judging whether a control chip in the liquid crystal instrument has a fault or not;
when the control chip breaks down, a first driving signal is output to drive the LCM based on the single chip microcomputer, the external memory and the timing controller.
Further, the processor 1001 may call the liquid crystal meter display program stored in the memory 1005, and also perform the following operations:
acquiring communication data of the single chip microcomputer and the control chip;
comparing the communication data with preset standard data;
when the communication data is inconsistent with the preset standard data, judging that the control chip has a fault;
and when the communication data is consistent with the preset standard data, judging that the control chip works normally.
Further, the processor 1001 may call the liquid crystal meter display program stored in the memory 1005, and also perform the following operations:
acquiring a write-in character instruction output by the singlechip, and transmitting the write-in character instruction to the timing controller;
after receiving the character writing instruction, downloading character information from the external memory to the timing controller;
acquiring automobile operation parameters output by the singlechip, and transmitting the automobile operation parameters to the timing controller;
and acquiring a first driving signal output by the timing controller based on the character information and the automobile running parameters, and driving the LCM based on the first driving signal.
The application provides a liquid crystal instrument display system, as shown in fig. 2, applied to a vehicle-mounted system.
At present, the traditional instrument can not meet the development requirements of automobile intellectualization and electromotion, and the liquid crystal instrument can display key information related to driving such as endurance mileage, battery capacity, driving assistance function, navigation and the like, and can form friendly interaction with a user to gradually replace the traditional instrument. Meanwhile, as a main information output port in the vehicle, the liquid crystal instrument will cooperate with other display components to realize the development trend of multi-screen fusion in the future.
Although the integrated information of the existing liquid crystal instrument is more comprehensive and more intelligent, the liquid crystal instrument has the defect of being not negligible, the whole liquid crystal instrument comprises configuration elements such as a CPU (central processing unit), an electronic screen and the like, and when the configuration elements are abnormal, the phenomenon that the liquid crystal instrument is black and crashed can be caused; different from the mechanical instrument, the functional displays of the liquid crystal instrument are relatively independent, and the functional displays of the liquid crystal instrument are mutually influenced, namely when the power supply of the liquid crystal instrument or the video signal fails, all information on the liquid crystal instrument can not be displayed, and the life safety of a driver can be seriously threatened.
In order to solve the above problem, referring to fig. 2, in an embodiment of the present application, the liquid crystal instrument display system includes a Controller Area Network (CAN) bus, a single chip, a control chip, a timing Controller, a liquid crystal communication (LCM) module, and an external memory, which are sequentially in communication connection with each other, the single chip, the control chip, the timing Controller, and the liquid crystal communication (LCM) module, and the external memory is in communication connection with the timing Controller;
the CAN bus is used for acquiring automobile operation parameters of an externally connected vehicle-mounted system;
the single chip microcomputer is in communication connection with the timing controller and is used for transmitting a character writing instruction to the timing controller when the control chip fails;
the timing controller is used for downloading character information from the external memory after receiving the character writing instruction;
the single chip microcomputer is also used for transmitting the automobile operation parameters to the timing controller when the timing controller downloads character information from the external memory;
the timing controller is further used for generating a first driving signal to drive the LCM according to the character information and the automobile operation parameters.
In this embodiment, the control chip includes a main control chip or a pass-to-pass chip; the single chip microcomputer is in communication connection with the timing controller and detects whether the control chip fails, and when the single chip microcomputer detects that the control chip fails, the written character instruction is transmitted to the timing controller; the timing controller downloads character information from an external memory after receiving a character writing instruction; then the singlechip transmits the automobile running parameters of the externally connected vehicle-mounted system collected by the CAN bus to the timing controller when the timing controller downloads character information from an external memory; and finally, generating a first driving signal to drive the LCM by the timing controller according to the character information and the automobile operation parameters. At this time, except for the fact that the display effect of the liquid crystal instrument is different (the display effect is not as rich as a normal display effect), referring to fig. 7 and 8, fig. 7 is an Interface schematic diagram of vehicle-mounted system information when the main control chip of the liquid crystal instrument is normal; fig. 8 is a schematic view of an interface of vehicle-mounted system information when the main control chip of the liquid crystal instrument fails, and in fig. 8, some vehicle operation parameter information is still effectively displayed to a driver for viewing, and the driver is reminded by information of "ERROR (abnormal display)".
In addition, the timing controller includes an On Screen Display (OSD) chip, which is an abbreviation of On Screen Display and is applied to a CRT/LCD Display to generate special characters or graphics On the Screen of the Display for users to get some messages. The control IC can display some special characters and figures at any position on the screen, and becomes an important message generating device on the human-computer interface. In the application, the OSD chip is respectively in communication connection with the single chip microcomputer and the external memory based on a Serial Peripheral Interface (SPI); when the control chip is in fault, the single chip transmits a character writing instruction to the OSD chip; then the OSD chip downloads character information from an external memory after receiving the character writing instruction; the single chip microcomputer transmits the automobile operation parameters of the externally connected vehicle-mounted system collected by the CAN bus to the OSD chip when the OSD chip downloads the character information from the external memory; and finally, generating a first driving signal to drive the LCM by the OSD chip according to the character information and the automobile operation parameters, referring to FIG. 6, transmitting the control signal to a gray power supply and a grid controller (powered by the grid power supply) in the LCM by the OSD chip, transmitting the control signal and data to a data driver in the LCM by the timing controller, transmitting the gray voltage to the data driver and the liquid crystal screen by the gray power supply, and transmitting the control signal to the liquid crystal screen by the grid controller, thereby displaying the automobile operation parameters on the liquid crystal screen. Except for the fact that the display effect of a User Interface (UI) of the liquid crystal instrument is different (the display effect is not as rich as a normal display effect), the certain automobile operation parameter information can be effectively displayed for a driver to see, and the information of the ERROR is provided to remind the driver.
In the embodiment, the liquid crystal instrument display system comprises a Controller Area Network (CAN) bus, a single chip microcomputer, a control chip, a timing controller, a liquid crystal communication Liquid Crystal Module (LCM) and an external memory, wherein the Controller Area Network (CAN) bus, the single chip microcomputer, the control chip, the timing controller and the liquid crystal communication LCM are sequentially in communication connection; the CAN bus is used for acquiring automobile operation parameters of an externally connected vehicle-mounted system; the single chip microcomputer is in communication connection with the timing controller and is used for transmitting a character writing instruction to the timing controller when the control chip fails; the timing controller is used for downloading character information from the external memory after receiving the character writing instruction; the single chip microcomputer is also used for transmitting the automobile operation parameters to the timing controller when the timing controller downloads character information from the external memory; the timing controller is further used for generating a first driving signal to drive the LCM according to the character information and the automobile operation parameters. This application draws out the independent design with the timing controller on the LCM module (timing controller does not integrate inside the LCM module), the communication of external memory and singlechip and timing controller has been increased simultaneously, therefore, this application is when the liquid crystal instrument breaks down, need not transmit car operating parameter to OSD chip through control chip, but by the singlechip will write in character instruction and car operating parameter transmission to OSD chip, the OSD chip downloads the character and handles character and car operating parameter from external memory, then form first drive signal drive LCM module, thereby can show car operating parameter when having realized the liquid crystal instrument trouble.
In another embodiment, the single chip microcomputer is in communication connection with the timing controller and detects whether the control chip has a fault, and when the single chip microcomputer detects that the control chip normally works, the single chip microcomputer obtains the automobile operation parameters from the CAN bus in a Universal Asynchronous Receiver/Transmitter (UART) mode; then the singlechip transmits the automobile operation parameters to a control chip for processing in an I2C (Inter-Integrated Circuit, bidirectional two-wire system synchronous serial bus) mode, and outputs video signals to a timing controller; the timing controller processes the video signal to generate a second driving signal to drive the LCM, namely the timing controller processes the LVDS or TTL image data signal sent by the master control and then drives and controls a driver, a controller and a power supply on the LCM after the clock signal is processed.
The application also provides a display method of the liquid crystal instrument, which is applied to a display system of the liquid crystal instrument. Referring to fig. 2, the liquid crystal instrument display system includes a CAN bus, a single chip, a control chip, a timing controller, a liquid crystal communication LCM module, and an external memory, which are sequentially in communication connection, and the single chip is in communication connection with the timing controller synchronously.
Referring to fig. 3, the liquid crystal instrument display method includes:
step S10, judging whether the control chip in the liquid crystal instrument has a fault;
although the integrated information of the existing liquid crystal instrument is more comprehensive and more intelligent, the liquid crystal instrument has the defect of being not negligible, the whole liquid crystal instrument comprises configuration elements such as a CPU (central processing unit), an electronic screen and the like, and when the configuration elements are abnormal, the phenomenon that the liquid crystal instrument is black and crashed can be caused; different from the mechanical instrument, the functional displays of the liquid crystal instrument are relatively independent, and the functional displays of the liquid crystal instrument are mutually influenced, namely when the power supply of the liquid crystal instrument or the video signal fails, all information on the liquid crystal instrument can not be displayed, and the life safety of a driver can be seriously threatened.
In the technical scheme disclosed by the application, the control chip comprises a main control chip or a pass-through chip (if the split type machine is adopted, the control chip is the pass-through chip); when the control chip is in fault and normal, the mode for driving the LCM is different, so that whether the control chip in the liquid crystal instrument is in fault or not needs to be judged, and according to the fault or normal work of the control chip, how to output the driving signal to drive the LCM is determined.
And step S20, outputting a first driving signal to drive the LCM based on the single chip, the external memory and the timing controller when the control chip fails.
When the control chip breaks down, the first driving signal is output to drive the LCM based on the single chip microcomputer, the external memory and the timing controller.
In this embodiment, whether a control chip in the liquid crystal instrument fails is judged firstly, and when the control chip fails, a first driving signal is output to drive the LCM module based on the single chip microcomputer, the external memory and the timing controller, so that when the liquid crystal instrument fails, the single chip microcomputer does not need to transmit the automobile operation parameters to the timing controller, but the single chip microcomputer transmits the written character instruction and the automobile operation parameters to the timing controller, the timing controller downloads characters from the external memory and processes the characters and the automobile operation parameters, and then the first driving signal is formed to drive the LCM module, so that the automobile operation parameters can be displayed when the liquid crystal instrument fails.
Further, in the second embodiment of the liquid crystal instrument display method of the present application, step S10 includes:
step S11, acquiring communication data of the single chip microcomputer and the control chip;
in the technical scheme disclosed in the application, the singlechip and the control chip communicate to generate shape data.
Step S12, comparing the communication data with preset standard data;
step S13, when the communication data is inconsistent with the preset standard data, judging that the control chip has a fault;
and step S14, when the communication data is consistent with the preset standard data, judging that the control chip works normally.
In the present embodiment, the communication data is compared with the preset standard data; when the communication data is inconsistent with the preset standard data, the control chip is judged to be in fault, so that when the control chip is abnormal, the singlechip transmits the written character instruction and the automobile running parameters to the timing controller, the timing controller downloads characters from an external memory and processes the characters and the automobile running parameters, and then a first driving signal is formed to drive the LCM, so that the automobile running parameters can be displayed when the liquid crystal instrument is in fault.
When the communication data is consistent with the preset standard data, judging that the control chip works normally, transmitting the automobile operation parameters to the control chip by the single chip, and outputting a video signal to the timing controller after the control chip processes the automobile operation parameters; the timing controller processes the video signal to generate a second driving signal to drive the LCM, namely the timing controller processes the LVDS or TTL image data signal sent by the master control and then drives and controls a driver, a controller and a power supply on the LCM after the clock signal is processed.
Further, in the third embodiment of the liquid crystal instrument display method of the present application, referring to fig. 4, step S20 includes:
step S21, acquiring a write-in character instruction output by the singlechip, and transmitting the write-in character instruction to the timing controller;
in the technical scheme disclosed by the application, the character instruction refers to an instruction for processing a character or a character string.
Step S22, after receiving the character writing command, downloading character information from the external memory to the timing controller;
step S23, obtaining automobile operation parameters output by the singlechip and transmitting the automobile operation parameters to the timing controller;
in the technical scheme disclosed in the application, the automobile operation parameters comprise information such as speed mileage, rotating speed, engine oil pressure, water temperature, fuel oil and charging.
And step S24, acquiring a first driving signal output by the timing controller based on the character information and the automobile running parameters, and driving the LCM based on the first driving signal.
In the technical scheme disclosed by the application, the timing controller processes LVDS or TTL image data signals and clock signals sent by a master controller; the shift register is used for storing and converting image data signals and clock signals into control signals, row and column signals and RSDS signals which can be identified by the screen, and controlling the work of MOSFET tubes in the screen to control the torsion degree of liquid crystal molecules, so that the information is transmitted to the LCM module to be displayed.
In the embodiment, the singlechip transmits the written character instruction and the automobile operation parameters to the timing controller, the timing controller downloads characters from an external memory and processes the characters and the automobile operation parameters, and then a first driving signal is formed to drive the LCM, so that the automobile operation parameters can be displayed when the liquid crystal instrument fails.
Referring to fig. 5, the present application also provides a liquid crystal instrument display device, including:
the judging module is used for judging whether a control chip in the liquid crystal instrument breaks down or not;
and the driving module is used for outputting a first driving signal to drive the LCM based on the singlechip, the external memory and the timing controller when the control chip fails.
Optionally, the determining module includes:
the first acquisition unit is used for acquiring communication data of the single chip microcomputer and the control chip;
the comparison unit is used for comparing the communication data with preset standard data;
the first judging unit is used for judging that the control chip has a fault when the communication data is inconsistent with the preset standard data;
and the second judging unit is used for judging that the control chip works normally when the communication data is consistent with the preset standard data.
Optionally, the driving module comprises:
the second acquisition unit is used for acquiring a written character instruction output by the singlechip and transmitting the written character instruction to the timing controller;
the downloading unit is used for downloading character information from the external memory to the timing controller after receiving the character writing instruction;
the third acquisition unit is used for acquiring the automobile operation parameters output by the singlechip and transmitting the automobile operation parameters to the timing controller;
and the fourth acquisition unit is used for acquiring a first driving signal output by the timing controller based on the character information and the automobile running parameters and driving the LCM based on the first driving signal.
The present application further provides a computer storage medium having a liquid crystal meter display program stored thereon, which when executed by a processor, performs the steps of the liquid crystal meter display method described above.
In the embodiments of the liquid crystal instrument display system, method and storage medium of the present application, all technical features of the embodiments of the liquid crystal instrument display method are included, and the expanding and explaining contents of the specification are basically the same as those of the embodiments of the liquid crystal instrument display method, and are not described herein again.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a robot device (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present application.
The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application, or which are directly or indirectly applied to other related technical fields, are included in the scope of the present application.
Claims (10)
1. The liquid crystal instrument display system is characterized by comprising a Controller Area Network (CAN) bus, a single chip microcomputer, a control chip, a timing controller, a liquid crystal communication Liquid Crystal Module (LCM) and an external memory, wherein the Controller Area Network (CAN) bus, the single chip microcomputer, the control chip, the timing controller and the liquid crystal communication LCM are sequentially in communication connection;
the CAN bus is used for acquiring automobile operation parameters of a vehicle-mounted system connected outside the liquid crystal instrument display system;
the single chip microcomputer is in communication connection with the timing controller and is used for transmitting a character writing instruction to the timing controller when the control chip fails;
the timing controller is used for downloading character information from the external memory after receiving the character writing instruction;
the single chip microcomputer is also used for transmitting the automobile operation parameters to the timing controller when the timing controller downloads character information from the external memory;
the timing controller is further used for generating a first driving signal to drive the LCM according to the character information and the automobile operation parameters.
2. The liquid crystal instrument display system of claim 1, wherein the timing controller comprises an OSD chip for on screen character display, the OSD chip being in communication connection with the single chip microcomputer and an external memory, respectively, based on a serial peripheral interface SPI;
the single chip microcomputer is used for transmitting a character writing instruction to the OSD chip when the control chip fails;
the OSD chip is used for downloading character information from the external memory after receiving the character writing instruction;
the single chip microcomputer is also used for transmitting the automobile operation parameters to the OSD chip when the OSD chip downloads character information from the external memory.
3. The liquid crystal instrument display system of claim 2, wherein the single chip microcomputer is further configured to detect whether the control chip has a fault.
4. The liquid crystal instrument display system of claim 3, wherein the control chip comprises a master control chip or a pass-through chip.
5. The liquid crystal instrument display system of claim 1, wherein the single chip is further configured to obtain the vehicle operating parameters from the CAN bus in a UART manner when the control chip is operating normally;
the single chip microcomputer is also used for transmitting the automobile operation parameters to the control chip in a bidirectional two-wire system synchronous serial bus I2C mode.
6. The liquid crystal instrument display system of claim 5, wherein the control chip is configured to process the vehicle operating parameters and output a video signal to the timing controller;
the timing controller is further used for processing the video signal to generate a second driving signal to drive the LCM.
7. A liquid crystal instrument display method is applied to a liquid crystal instrument display system and is characterized in that the liquid crystal instrument display system comprises a CAN bus, a single chip microcomputer, a control chip, a timing controller, a liquid crystal communication LCM module and an external memory, wherein the CAN bus, the single chip microcomputer, the control chip, the timing controller and the liquid crystal communication LCM module are sequentially in communication connection, the external memory is in communication connection with the timing controller, and the single chip microcomputer is synchronously in communication connection with the timing controller;
the liquid crystal instrument display method comprises the following steps:
judging whether a control chip in the liquid crystal instrument has a fault or not;
when the control chip breaks down, a first driving signal is output to drive the LCM based on the single chip microcomputer, the external memory and the timing controller.
8. The liquid crystal instrument display method of claim 7, wherein the step of determining whether the control chip in the liquid crystal instrument is malfunctioning comprises:
acquiring communication data of the single chip microcomputer and the control chip;
comparing the communication data with preset standard data;
when the communication data is inconsistent with the preset standard data, judging that the control chip has a fault;
and when the communication data is consistent with the preset standard data, judging that the control chip works normally.
9. The method for displaying the liquid crystal instrument as claimed in claim 7, wherein the step of outputting the first driving signal to drive the LCM based on the single chip, the external memory and the timing controller when the control chip fails comprises:
acquiring a write-in character instruction output by the singlechip, and transmitting the write-in character instruction to the timing controller;
after receiving the character writing instruction, downloading character information from the external memory to the timing controller;
acquiring automobile operation parameters output by the singlechip, and transmitting the automobile operation parameters to the timing controller;
and acquiring a first driving signal output by the timing controller based on the character information and the automobile running parameters, and driving the LCM based on the first driving signal.
10. A storage medium, characterized in that the storage medium has stored thereon a liquid crystal meter display program, which when executed by a processor implements the steps of the liquid crystal meter display method according to any one of claims 7 to 9.
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| CN106627148A (en) * | 2016-11-25 | 2017-05-10 | 未来汽车科技（深圳）有限公司 | Car dashboard and emergency method for failure of car dashboard |
| KR20180074973A (en) * | 2016-12-26 | 2018-07-04 | 삼성전자주식회사 | Electronic device for linking/separating information between digital displays |
| CN107117033B (en) * | 2017-04-28 | 2020-03-06 | 北京新能源汽车股份有限公司 | Information display control method and device, instrument controller and electric automobile |
| CN207291681U (en) * | 2017-08-18 | 2018-05-01 | 中国重汽集团福建海西汽车有限公司 | Automobile using multifunction instrument display system |
| US20190114132A1 (en) * | 2017-10-12 | 2019-04-18 | Qualcomm Incorporated | Alternative display options for vehicle telltales |
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