CN113799601A - Input control method, device and medium for vehicle-mounted LCD display screen and automobile - Google Patents
Input control method, device and medium for vehicle-mounted LCD display screen and automobile Download PDFInfo
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- 230000015556 catabolic process Effects 0.000 abstract 1
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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—Arrangement of adaptations of instruments
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- B60K35/22—
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
Abstract
The invention provides an input control method of a vehicle-mounted LCD display screen, which is applied to a screen menu type OSD (on screen display) chip and comprises the following steps: acquiring a signal to be displayed according to a first channel, and judging whether the signal to be displayed is abnormal or not; when the signal to be displayed is not abnormal, the signal to be displayed collected according to the first channel is sent to the LCD display screen; and when the signal to be displayed is abnormal, acquiring the signal to be displayed according to a second channel, and transmitting the signal to be displayed acquired according to the second channel to the LCD display screen. The invention realizes the safety level control when the automobile instrument is integrated into the multimedia center control, can effectively avoid the problem that the LCD display screen has no output or display error when software and hardware faults or system breakdown occurs through double-channel acquisition, ensures that the LCD display screen normally outputs instrument signals, and is beneficial to protecting the safety of a driver.
Description
Technical Field
The invention relates to the technical field of information, in particular to an input control method, device and medium for a vehicle-mounted LCD display screen and an automobile.
Background
In recent years, automobile multimedia is rapidly developed, and the trend of integrating automobile instruments into multimedia center control is remarkable. In the prior art, when an automobile instrument and a multimedia central control are integrated into a whole, a multimedia control chip simultaneously realizes the tasks of instrument display and multimedia display. The instrument signal or the multimedia signal is transmitted to the microcontroller through the CAN bus, then transmitted to the multimedia control chip through the microcontroller, and finally the multimedia control chip controls the LCD display screen to output the instrument signal or the multimedia signal.
However, the existing multimedia control chip does not have security level control. When a hardware or software fault occurs in the multimedia control chip or system, the LCD display screen may have a fault or display error without any display, so that a driver cannot see a correct instrument signal, such as key information of vehicle speed, oil quantity, rotation speed, etc., from the LCD display screen.
Disclosure of Invention
The invention provides an input control method, device and medium of a vehicle-mounted LCD display screen and an automobile, and aims to solve the problems that safety level control is lacked and potential safety hazards are large when an existing automobile instrument is integrated into multimedia center control.
The invention is realized in this way, a method for controlling input of a vehicle-mounted LCD display screen, the method comprises:
collecting a signal to be displayed according to a first channel;
judging whether the signal to be displayed is abnormal or not;
when the signal to be displayed is not abnormal, the signal to be displayed collected according to the first channel is sent to the LCD display screen;
and when the signal to be displayed is abnormal, acquiring the signal to be displayed according to a second channel, and transmitting the signal to be displayed acquired according to the second channel to the LCD display screen.
Optionally, the method is applied to an on-screen menu type adjustment OSD chip, the OSD chip is connected with a multimedia control chip, the multimedia control chip is connected with a microcontroller, and the microcontroller receives a signal to be displayed through a CAN bus;
the acquiring the signal to be displayed according to the first channel comprises the following steps:
and acquiring a signal to be displayed from the multimedia control chip according to a first preset period.
Optionally, the OSD chip is further connected with the microcontroller through a preset interface, and the microcontroller receives a signal to be displayed through a CAN bus;
the acquiring the signal to be displayed according to the second channel comprises:
and acquiring a signal to be displayed from the microcontroller according to a second preset period.
Optionally, the determining whether the signal to be displayed is abnormal includes:
acquiring signals to be displayed corresponding to a plurality of continuous periods;
comparing signals to be displayed corresponding to adjacent periods;
and if the signals to be displayed corresponding to the adjacent periods are all kept unchanged, determining that the signals to be displayed are abnormal, otherwise, determining that the signals to be displayed are not abnormal.
Optionally, the preset interface includes a universal asynchronous receiver transmitter and/or a serial peripheral interface.
An input control device for an on-vehicle LCD display screen, the device comprising:
the first acquisition module is used for acquiring a signal to be displayed according to a first channel;
the judging module is used for judging whether the signal to be displayed acquired by the first acquisition module is abnormal or not;
the first acquisition module is further used for sending the signal to be displayed acquired according to the first channel to the LCD display screen when the signal to be displayed is not abnormal;
and the second acquisition module is used for acquiring the signal to be displayed according to a second channel when the signal to be displayed is abnormal, and transmitting the signal to be displayed acquired according to the second channel to the LCD display screen.
Optionally, the first acquisition module is connected with a multimedia control chip, the multimedia control chip is connected with a microcontroller, and the microcontroller receives a signal to be displayed through a CAN bus;
the first acquisition module is used for acquiring signals to be displayed from the multimedia control chip according to a first preset period.
Optionally, the second acquisition module is further connected with the microcontroller through a preset interface, and the microcontroller receives a signal to be displayed through a CAN bus;
and the second acquisition module is used for acquiring a signal to be displayed from the microcontroller according to a second preset period.
A computer-readable storage medium, which stores a computer program that, when executed by a processor, implements the input control method of the on-vehicle LCD display screen as described above.
An automobile comprises an input control device of a vehicle-mounted LCD display screen, and the input control device of the vehicle-mounted LCD display screen realizes the input control method of the vehicle-mounted LCD display screen.
The embodiment of the invention updates the input control mode of the conventional vehicle-mounted LCD display screen, acquires the signal to be displayed according to the first channel and judges whether the signal to be displayed is abnormal or not; when the signal to be displayed is not abnormal, the signal to be displayed collected according to the first channel is sent to the LCD display screen; when the signal to be displayed is abnormal, acquiring the signal to be displayed according to a second channel, and sending the signal to be displayed acquired according to the second channel to the LCD display screen; therefore, the safety level control of the automobile instrument in the multimedia central control integration is realized, the problem that the LCD display screen has no output or display errors when software and hardware faults or a system is crashed can be effectively avoided through the double-channel acquisition, the normal output of instrument signals by the LCD display screen is guaranteed, and the safety of a driver is protected.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a block diagram of an input control system of a vehicle LCD display according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating an implementation of an input control method for a vehicle-mounted LCD display according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating an implementation of step S202 in the input control method for the on-vehicle LCD display screen according to an embodiment of the present invention;
FIG. 4 is a block diagram of an input control device of a vehicle LCD display according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a computer device according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The following describes in detail the input control method of the on-vehicle LCD display provided in this embodiment. The embodiment of the invention solves the problems of lack of safety level control and larger potential safety hazard when the existing automobile instrument is integrated into the multimedia central control, realizes the safety level control when the automobile instrument is integrated into the multimedia central control, can effectively avoid the problem that an LCD display screen does not output or display errors when software and hardware faults or a system is crashed by a double-channel acquisition mode, ensures that the LCD display screen outputs instrument signals normally, is beneficial to a driver to master vehicle driving information in time, and is convenient for driving and improving the safety.
FIG. 1 is an input control system for a vehicle LCD display screen provided by the present invention. As shown in fig. 1, the input control system of the on-vehicle LCD display screen includes: microcontroller 01, multimedia control chip 02, OSD chip 03, LCD display screen 04. The OSD chip 03 is connected with the microcontroller 01, the multimedia control chip 02 and the LCD screen 04 respectively. The microcontroller 01 is also connected with the multimedia control chip 02.
Here, the microcontroller 01 receives a signal to be displayed from the CAN bus. The signal to be displayed includes but is not limited to a meter signal and a multimedia signal. In this embodiment, the signal to be displayed may be transmitted to the LCD 04 for displaying according to the first channel or the second channel.
In the first channel, the signal to be displayed is received from the CAN bus through the microcontroller 01, and then signal processing including but not limited to filtering processing, format conversion and the like is performed through the multimedia control chip 02, and the processed signal is transmitted to the LCD display screen 04 through the OSD chip 03 for display. Correspondingly, the OSD chip 03 receives a signal to be displayed from the multimedia control chip 02.
In the second channel, the signal to be displayed is received from the CAN bus through the microcontroller 01, and then transmitted to the LCD display screen 04 through the OSD chip 03 for display. Correspondingly, the OSD chip 03 receives a signal to be displayed from the microcontroller 01.
Under a conventional condition, when the multimedia control chip 02 or system software and hardware normally work, the signal to be displayed is transmitted according to a first channel. The OSD chip 03 collects signals to be displayed according to the first channel, that is, the signals to be displayed are collected from the multimedia control chip 02. And sending the signal to be displayed collected according to the first channel to the LCD display screen 04. At this time, the OSD chip is equivalent to a signal channel without any processing. When the multimedia control chip 02 or system software and hardware have faults, the OSD chip 03 can quickly recognize that the signal to be displayed is abnormal, switches a transmission channel of the signal to be displayed, interacts with the microcontroller 01 through a preset interface of the OSD chip 03, collects the signal to be displayed according to a second channel, namely directly receives the signal to be displayed from the microcontroller 01, and sends the signal to be displayed, collected according to the second channel, to the LCD display screen 04.
Optionally, the microcontroller 01 and the multimedia control chip 02 are connected and communicated through a universal asynchronous receiver transmitter (SPI) and/or a serial peripheral interface (UART); the microcontroller and the OSD chip 03 are connected and communicated through a universal asynchronous receiving and transmitting transmitter SPI and/or a serial peripheral interface UART.
According to the embodiment of the invention, the OSD chip 03 is added in the existing automobile instrument-multimedia central control integration, and the transmission channel of the microcontroller 01 for transmitting the signal to be displayed to the LCD display screen 04 is expanded, so that the safety level control when the automobile instrument-multimedia central control integration is realized, the problem that the LCD display screen has no output or display error when software and hardware faults or a system is broken down can be effectively avoided through a double-channel acquisition mode, the normal output of the instrument signal by the LCD display screen is ensured, a driver can timely master the vehicle driving information, and the driving is facilitated and the safety is improved.
Fig. 2 is a flowchart illustrating an implementation of an input control method for a vehicle-mounted LCD display screen according to the present invention. The control method of the vehicle-mounted LCD display screen is applied to an OSD chip 03, as shown in FIG. 2, and comprises the following steps:
in step S201, a signal to be displayed is acquired according to a first channel.
As mentioned above, the OSD chip 03 is connected to the multimedia control chip 02, the multimedia control chip 02 is connected to the microcontroller 01, and the microcontroller 01 receives a signal to be displayed through the CAN bus. The acquiring of the signal to be displayed according to the first channel specifically comprises: and acquiring a signal to be displayed from the multimedia control chip according to a first preset period.
Here, the signal to be displayed is transmitted through the first channel by default, and the OSD chip 03 acquires the signal to be displayed by default through the first channel, that is, the signal to be displayed is acquired from the multimedia control chip 02.
In step S202, it is determined whether the signal to be displayed is abnormal.
Optionally, the signal to be displayed includes, but is not limited to, a meter signal, a multimedia signal. Under normal conditions, the signal to be displayed is changed, and if the multimedia control chip 02 or system software and hardware fails, the OSD chip 03 cannot receive the normal signal to be displayed from the multimedia control chip 02, or the received signal to be displayed is continuously unchanged. As a preferred example of the present invention, as shown in fig. 3, the step S202 of determining whether the signal to be displayed is abnormal includes:
in step S301, signals to be displayed corresponding to several consecutive periods are acquired.
In this embodiment, the OSD chip receives a signal to be displayed from the multimedia control chip 02 according to a first preset period. The signals to be displayed corresponding to a plurality of continuous periods are taken as a detection group, and the number of the periods included in the detection group can be specifically set according to actual needs.
In step S302, signals to be displayed corresponding to adjacent periods are compared.
And traversing the signals to be displayed corresponding to the adjacent periods in the detection group, and comparing whether the signals to be displayed corresponding to the adjacent periods are the same.
In step S303, if the signals to be displayed corresponding to the adjacent periods are all kept unchanged, it is determined that the signals to be displayed are abnormal.
In step S304, if the signal to be displayed corresponding to any adjacent period changes, it is determined that the signal to be displayed is not abnormal.
If the signals to be displayed corresponding to adjacent periods in the detection group are the same, that is, the signals to be displayed corresponding to the adjacent periods are all kept unchanged, the signals to be displayed are considered to be abnormal, and it indicates that the OSD chip 03 cannot receive normal instrument signals or multimedia signals from the multimedia control chip 02. Otherwise, as long as the signal to be displayed corresponding to any adjacent period in the detection group changes, that is, the signal to be displayed is a changed signal, it is determined that the signal to be displayed is not abnormal, indicating that the OSD chip 03 can receive a normal instrument signal or multimedia signal from the multimedia control chip 02.
In step S203, when the signal to be displayed is not abnormal, the signal to be displayed collected according to the first channel is sent to the LCD display screen.
Here, when the signal to be displayed is not abnormal, it indicates that the OSD chip 03 can receive a normal signal to be displayed from the multimedia control chip 02, and then the OSD chip 03 continues to collect the signal to be displayed according to the first channel. The signal to be displayed reaches the microcontroller 01 through the CAN bus, then reaches the LCD display screen 04 through the multimedia control chip 02 and then reaches the LCD display screen 04 through the OSD chip 03 for displaying.
In step S204, when the signal to be displayed is abnormal, the signal to be displayed is collected according to the second channel, and the signal to be displayed collected according to the second channel is sent to the LCD display screen.
When the signal to be displayed is abnormal, it indicates that the OSD chip 03 cannot receive normal instrument signals or multimedia signals from the multimedia control chip 02, and then the OSD chip 03 cuts off the input channel of the abnormal signal.
Here, the OSD chip 03 is also connected to the microcontroller 01 via a predetermined interface. The preset interface comprises a universal asynchronous receiving and transmitting transmitter SPI and/or a serial peripheral interface UART. And after the signal to be displayed reaches the microcontroller 01 through the CAN bus, the signal to be displayed is directly transmitted to the OSD chip 03 through the preset interface. The acquiring of the signal to be displayed according to the second channel specifically comprises the following steps: and acquiring a signal to be displayed from the microcontroller according to a second preset period. The OSD chip 03 interacts with the microcontroller 01 through the preset interface, collects signals to be displayed according to a second preset period, and sends the signals to be displayed to the LCD display screen 04.
It should be understood that the first preset period and the second preset period are set according to practical applications, and may be the same or different, and are not limited herein.
According to the embodiment of the invention, the OSD chip is added in the existing automobile instrument and multimedia central control integration, whether the signal to be displayed is normal is acquired and identified from the multimedia control chip through the OSD chip, the signal to be displayed is directly transmitted to the LCD screen when the signal to be displayed is normal, the transmission channel of the multimedia chip is switched when the signal to be displayed is abnormal, the signal to be displayed is acquired from the microcontroller and transmitted to the LCD screen, the safety level control when the automobile instrument is integrated into the multimedia central control is realized, the problem that the LCD screen does not output or has display errors when software and hardware faults or a system is crashed can be effectively avoided through the dual-channel acquisition, the normal output of the instrument signal by the LCD screen is ensured, and the safety of a driver is protected.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
In an embodiment, an input control device of a vehicle-mounted LCD display screen is provided, and the input control device of the vehicle-mounted LCD display screen is applied to an OSD chip, and corresponds to the input control method of the vehicle-mounted LCD display screen in the above embodiments one to one. As shown in FIG. 4, the input control device of the vehicle-mounted LCD display screen comprises a first acquisition module 41, a judgment module 42 and a second acquisition module 43. The functional modules are explained in detail as follows:
a first collecting module 41, configured to collect a signal to be displayed according to a first channel;
a judging module 42, configured to judge whether the signal to be displayed acquired by the first acquiring module is abnormal;
the first acquisition module 41 is further configured to, when the signal to be displayed is not abnormal, send the signal to be displayed acquired according to the first channel to the LCD display screen;
and the second acquisition module 43 is configured to acquire the signal to be displayed according to the second channel when the signal to be displayed is abnormal, and send the signal to be displayed, acquired according to the second channel, to the LCD display screen.
Optionally, the first acquisition module 41 is connected to a multimedia control chip, the multimedia control chip is connected to a microcontroller, and the microcontroller receives a signal to be displayed through a CAN bus;
the first collecting module 41 is configured to collect a signal to be displayed from the multimedia control chip according to a first preset period.
Optionally, the second acquisition module 43 is further connected to the microcontroller through a preset interface;
the second collecting module 43 is configured to collect a signal to be displayed from the microcontroller according to a second preset period.
Optionally, the determining module 42 includes:
the device comprises an acquisition unit, a display unit and a display unit, wherein the acquisition unit is used for acquiring signals to be displayed corresponding to a plurality of continuous periods;
the comparison unit is used for comparing signals to be displayed corresponding to adjacent periods;
and the result unit is used for considering that the signal to be displayed is abnormal if the signals to be displayed corresponding to the adjacent periods are kept unchanged, otherwise, considering that the signal to be displayed is not abnormal.
For specific limitations of the input control device of the on-vehicle LCD display screen, reference may be made to the above limitations of the input control method of the on-vehicle LCD display screen, which are not described herein again. All or part of each module in the input control device of the vehicle-mounted LCD display screen can be realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a computer device is provided, which may be a server, the internal structure of which may be as shown in fig. 5. The computer device includes a processor, a memory, a network interface, and a database connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement an input control method for an on-vehicle LCD display.
In one embodiment, a computer device is provided, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the following steps when executing the computer program:
collecting a signal to be displayed according to a first channel; judging whether the signal to be displayed is abnormal or not;
when the signal to be displayed is not abnormal, the signal to be displayed collected according to the first channel is sent to the LCD display screen;
and when the signal to be displayed is abnormal, acquiring the signal to be displayed according to a second channel, and transmitting the signal to be displayed acquired according to the second channel to the LCD display screen.
In another embodiment, an automobile is provided, which comprises an input control device of an on-board LCD display screen, wherein the input control device of the on-board LCD display screen realizes the input control method of the LCD display screen.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, databases, or other media used in embodiments provided herein may include non-volatile and/or volatile memory. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. An input control method of a vehicle-mounted LCD display screen is characterized by comprising the following steps:
collecting a signal to be displayed according to a first channel;
judging whether the signal to be displayed is abnormal or not;
when the signal to be displayed is not abnormal, the signal to be displayed collected according to the first channel is sent to the LCD display screen;
and when the signal to be displayed is abnormal, acquiring the signal to be displayed according to a second channel, and transmitting the signal to be displayed acquired according to the second channel to the LCD display screen.
2. The input control method of the vehicle-mounted LCD display screen according to claim 1, characterized in that the method is applied to an OSD chip for screen menu adjustment, the OSD chip is connected with a multimedia control chip, the multimedia control chip is connected with a microcontroller, and the microcontroller receives a signal to be displayed through a CAN bus;
the acquiring the signal to be displayed according to the first channel comprises the following steps:
and acquiring a signal to be displayed from the multimedia control chip according to a first preset period.
3. The input control method of the vehicle-mounted LCD display screen according to claim 2, wherein the OSD chip is further connected with the microcontroller through a preset interface, and the microcontroller receives the signal to be displayed through a CAN bus;
the acquiring the signal to be displayed according to the second channel comprises:
and acquiring a signal to be displayed from the microcontroller according to a second preset period.
4. The input control method of the on-vehicle LCD display of any one of claims 1 to 3, wherein the determining whether the signal to be displayed is abnormal includes:
acquiring signals to be displayed corresponding to a plurality of continuous periods;
comparing signals to be displayed corresponding to adjacent periods;
and if the signals to be displayed corresponding to the adjacent periods are all kept unchanged, determining that the signals to be displayed are abnormal, otherwise, determining that the signals to be displayed are not abnormal.
5. The input control method of the vehicular LCD display screen according to claim 3, wherein the preset interface comprises a universal asynchronous receiver transmitter and/or a serial peripheral interface.
6. An input control device for a vehicle-mounted LCD display screen, the device comprising:
the first acquisition module is used for acquiring a signal to be displayed according to a first channel;
the judging module is used for judging whether the signal to be displayed acquired by the first acquisition module is abnormal or not;
the first acquisition module is further used for sending the signal to be displayed acquired according to the first channel to the LCD display screen when the signal to be displayed is not abnormal;
and the second acquisition module is used for acquiring the signal to be displayed according to a second channel when the signal to be displayed is abnormal, and transmitting the signal to be displayed acquired according to the second channel to the LCD display screen.
7. The input control device of the vehicle-mounted LCD display screen according to claim 6, wherein the first acquisition module is connected with a multimedia control chip, the multimedia control chip is connected with a microcontroller, and the microcontroller receives a signal to be displayed through a CAN bus;
the first acquisition module is used for acquiring signals to be displayed from the multimedia control chip according to a first preset period.
8. The input control device of the vehicular LCD display screen according to claim 7, wherein the second acquisition module is further connected to the microcontroller through a preset interface, and the microcontroller receives a signal to be displayed through a CAN bus;
and the second acquisition module is used for acquiring a signal to be displayed from the microcontroller according to a second preset period.
9. A computer-readable storage medium storing a computer program, wherein the computer program, when executed by a processor, implements the input control method of the LCD display panel for vehicles according to any one of claims 1 to 5.
10. An automobile characterized by comprising an input control device of an on-vehicle LCD display screen, which implements the input control method of the LCD display screen according to any one of claims 1 to 5.
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| CN202010536423.0A CN113799601A (en) | 2020-06-12 | 2020-06-12 | Input control method, device and medium for vehicle-mounted LCD display screen and automobile |
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| CN202010536423.0A CN113799601A (en) | 2020-06-12 | 2020-06-12 | Input control method, device and medium for vehicle-mounted LCD display screen and automobile |
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