CN115657471A - Liquid crystal screen temperature self-adaptive control method and equipment for special vehicle - Google Patents
Liquid crystal screen temperature self-adaptive control method and equipment for special vehicle Download PDFInfo
- Publication number
- CN115657471A CN115657471A CN202211164281.5A CN202211164281A CN115657471A CN 115657471 A CN115657471 A CN 115657471A CN 202211164281 A CN202211164281 A CN 202211164281A CN 115657471 A CN115657471 A CN 115657471A
- Authority
- CN
- China
- Prior art keywords
- liquid crystal
- temperature
- crystal screen
- component
- screen
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention discloses a liquid crystal display temperature self-adaptive control method and equipment for a special vehicle, wherein the method comprises the steps of obtaining resistance encountered on a heat flow path of a component; carrying out thermal simulation on the work of the liquid crystal screen according to the arrangement position of the vehicle-mounted liquid crystal screen on the vehicle to obtain a thermal simulation data model of the work of the liquid crystal screen, obtaining the maximum stable temperature of the work of components of the liquid crystal screen, and substituting the maximum stable temperature into the thermal simulation data model to obtain a thermal simulation result of the work of the liquid crystal screen; obtaining a temperature range in which the liquid crystal screen can not work completely according to a thermal simulation result of the liquid crystal screen; the brightness of the liquid crystal display screen is adaptively adjusted according to the temperature range in which the liquid crystal display screen can not work completely, and the normal display function of the liquid crystal display screen under the full-time global scene is realized; carrying out a heat balance test of the scheme on the vehicle under the scenes of high temperature and high cold limit temperature, and verifying the accuracy of the scheme; the invention can realize the monitoring and protection of the full-time full-domain liquid crystal display screen temperature control system.
Description
Technical Field
The invention belongs to the technical field of liquid crystal screen temperature control, and particularly relates to a liquid crystal screen temperature self-adaptive control method and liquid crystal screen temperature self-adaptive control equipment for a special vehicle.
Background
The utilization rate of the liquid crystal display screen is higher and higher on the automobile, but the use environment of special vehicles is very severe, and the liquid crystal display screen can be normally used all the time. The liquid crystal screen of the consumer product usually has the working temperature of 0-50 ℃ at normal temperature, the working temperature of the liquid crystal screen of the industrial grade of-20-70 ℃ and the working temperature of the display screen of the conventional civil standard grade of-30-85 ℃. However, for the field of special vehicles, it is obvious that the three products are difficult to meet the requirements, and the severe cold regions with global climate lower than-30 ℃ are widely distributed, and the special vehicles execute important tasks in these regions, and if the black screen, the flower screen and other unavailable faults occur, the signal communication, situation perception, even control system functions and the like are seriously damaged, so that the execution of the important tasks is influenced, and the adverse consequences are very serious. Related enterprises in the industry can use the liquid crystal screen with special care aiming at vehicles which are often in extreme environments, such as engineering off-road vehicles, and in case of the liquid crystal screen not working, besides very poor user experience, the liquid crystal instrument does not work, and great hidden danger is also caused to driving safety.
In the existing scheme, manufacturers using all liquid crystal instruments can heat the liquid crystal screen by adopting resistance wires, heating films and other modes. For example, there is a prior art that discloses a power supply and protection method of a dual protection circuit considering temperature, which includes: the input end of the voltage reduction module is connected with an external power supply, and a fuse is connected in series in a connecting passage of the external power supply and the voltage reduction module; the temperature protection module comprises a temperature sensor component and a control unit; the output end of the voltage reduction module is connected with the temperature sensor component through the control unit, the temperature sensor component transmits the output sensing temperature signal to the control unit, and the control unit controls the output state of the voltage reduction module. Although the scheme can realize double protection of electric resistance and thermal shock resistance, and the circuit can be recovered automatically, and can be applied to the technical field of circuit protection; according to the scheme, double protection of current overload and temperature is realized through the self-recovery fuse and the temperature protection circuit constructed based on the temperature sensor, the circuit stability is high, and the damage prevention capability is strong; but the power supply can be protected only at high temperature, and the working characteristic is that under the extremely cold and low temperature environment, the temperature rise processing is firstly carried out on the display screen, and then the control system controls each display control system to realize the corresponding function; in a high-temperature environment, the temperature of the display screen is firstly reduced, then the control system controls each display control system to realize corresponding functions, the whole temperature control process consumes a long time, and the system still cannot work normally in the temperature control process, so that the functional requirement of the vehicle-mounted display screen for displaying all the time cannot be met; and the temperature control process strategy of temperature rise and temperature fall is not discussed in detail, and the control risk of the application process may exist.
In addition, the prior art publication No. CN214335408U, entitled a liquid crystal screen heating control and detection circuit, discloses that a liquid crystal screen heating control and detection circuit includes a heating control circuit and a heating detection circuit, both of which are connected with both ends of a heating component on a liquid crystal screen; the circuit can not only improve the testability of the display, but also detect failure devices in time, avoid the damage of the liquid crystal screen caused by out-of-control heating of the liquid crystal screen and improve the reliability of the display; but the power supply can be protected only at high temperature, and the functional requirement of the vehicle-mounted display screen for displaying all the time cannot be met; the scheme has the functional characteristics of controlling the accuracy and the safety in the temperature rising process, only adopts a design method of a tube temperature control and rise circuit in the temperature rising process, and cannot realize the functions of a monitoring and protecting device of a full-time global display screen temperature control system.
Therefore, there is an urgent need for a device capable of monitoring and protecting a full-time global liquid crystal display screen temperature control system to solve the above-mentioned defects of the prior art.
Disclosure of Invention
Aiming at the defects or improvement requirements in the prior art, the invention provides a liquid crystal display temperature self-adaptive control method and equipment for a special vehicle, wherein a drive circuit is optimally controlled in a low-temperature state and a high-temperature state, and algorithm simulation calibration and simulation calculation of an ultra-wide temperature zone are carried out, so that self-adaptive adjustment of brightness is realized, and the normal display function guarantee of the liquid crystal display screen in a full-time global scene is realized by increasing or reducing the temperature of screen backlight; scheme deployment is carried out at the initial stage of development of the vehicle-mounted display control system, and through optimization of circuit design, algorithm control and simulation verification, front-end reasonable design is achieved, and difficulty in matching of a rear-mounted system and reliability risks are avoided; the invention does not need to additionally increase a hardware heating system or a cooling system, and can overcome the defect that the existing liquid crystal screen temperature control technology cannot realize full-time global display screen temperature control monitoring and protection.
In order to achieve the above object, a first aspect of the present invention provides a liquid crystal display temperature adaptive control method for a special vehicle, comprising the following steps:
s1: confirming the heating coefficients of the components according to the printed circuit board, the components and the type selection of the components of the vehicle-mounted liquid crystal screen, and obtaining the resistance of the components of the liquid crystal screen on a heat flow path;
s2: carrying out thermal simulation on the work of the liquid crystal screen according to the arrangement position of the vehicle-mounted liquid crystal screen on the vehicle to obtain a thermal simulation data model of the work of the liquid crystal screen;
s3, obtaining the thermal resistance of a heat source junction of the liquid crystal screen component and a component packaging shell and the power consumption of the component in a normal temperature state according to the specification of the semiconductor component;
s4, calculating the temperature rise of the liquid crystal display device on the heat flow path according to the resistance of the liquid crystal display device on the heat flow path, the heat resistance of a heat source junction of the device and a device packaging shell and the power consumption of the liquid crystal display device in a normal temperature state;
s5, calculating the maximum working stable temperature of the liquid crystal screen component according to the temperature rise of the liquid crystal screen component on the heat flow path;
s6, substituting the maximum stable working temperature of the liquid crystal screen component into the thermal simulation data model to obtain a thermal simulation result of the liquid crystal screen;
s7: reversely simulating according to the working thermal simulation result of the liquid crystal screen to obtain the temperature range in which the liquid crystal screen can not work completely;
s8: the brightness of the liquid crystal display screen is adaptively adjusted according to the temperature range in which the liquid crystal display screen can not work completely, and the normal display function of the liquid crystal display screen under the full-time global scene is realized;
s9: and (4) carrying out a heat balance test on the vehicle under the scenes of high temperature and high cold limit temperature of the scheme in the steps S1 to S8, and verifying the accuracy of the scheme.
Further, the obtaining of the temperature range in which the liquid crystal panel in step S7 is completely inoperable includes:
s71: calculating the maximum stable temperature of the vehicle-mounted liquid crystal screen at the highest ambient temperature;
s72: according to the heating coefficient corresponding to the components in the component specification under the rated power, the backlight of the liquid crystal screen is adjusted to be low so as to reduce the actual power of the components of the liquid crystal screen, and the components enter a low power consumption mode; obtaining the maximum environment temperature of the liquid crystal screen when the liquid crystal screen works at the maximum stable temperature according to the temperature saving reverse simulation in the component specification;
s73: according to the maximum heating coefficient of the components at the maximum power in the component specification, performing simulation calculation on the components from the lowest working temperature to the lower temperature gradually to obtain the lowest working temperature which can be obtained by heating when the liquid crystal screen works at a low temperature;
s74: and obtaining the temperature range in which the liquid crystal screen can not work completely according to the maximum ambient temperature of the liquid crystal screen when the liquid crystal screen works at the maximum stable temperature and the minimum working temperature which can be obtained by heating when the liquid crystal screen works at a low temperature.
Further, step S8 further includes:
s81, detecting and acquiring the actual working temperature of the liquid crystal screen through a temperature sensor on a liquid crystal screen component;
s82, judging whether the actual working temperature of the liquid crystal screen is higher than the maximum environment temperature of the liquid crystal screen when the liquid crystal screen works at the maximum stable temperature; if yes, controlling the liquid crystal display screen to enter a low power consumption mode through software, reducing the brightness of the liquid crystal display screen, and repeating the steps S81 and S82; otherwise, executing the next step;
s83, judging whether the actual working temperature of the liquid crystal screen is lower than the lowest working temperature which can be obtained by heating when the liquid crystal screen works in a low-temperature state; if so, controlling the liquid crystal display screen to enable the screen brightness of the liquid crystal display screen to be maximum through software, and entering a maximum power working state; otherwise, executing the next step;
and S84, controlling the liquid crystal display screen to enter a low power consumption mode through software, and simultaneously reducing the brightness of the liquid crystal display screen.
Further, the liquid crystal screen components in the step S1 include liquid crystal screen components with component cooling fins and liquid crystal screen components without component cooling fins; the liquid crystal screen components without the component radiating fins comprise high-power liquid crystal screen components and low-power liquid crystal screen components.
Further, for the liquid crystal panel component with the component heat sink, the maximum stable temperature Tcmax1 of the liquid crystal panel component operation is expressed by the formula (1):
Tcmax1＝TJ-P*(RJC+RCS+RSA) (1)
wherein TJ is the heat source junction temperature of the component; p is the power consumption of the component in the normal temperature state; RJC is the temperature difference between a heat source junction of the component and a component packaging shell; RCS is the thermal resistance from the packaging shell of the component to the radiating fin of the component; RSA represents the thermal resistance of the component heat sink to the environment;
the thermal resistance RCA between the component packaging shell and the environment is calculated by the following formula (2):
RCA＝RCS+RSA＝0(2)。
further, for the liquid crystal panel component without the component heat sink, the maximum stable temperature Tcmax2 of the high-power liquid crystal panel component is represented by formula (3):
Tcmax2＝TJ-P*(RJC+RCA) (3)
wherein: RCA is the thermal resistance between the package and the environment.
Further, for a liquid crystal panel component without a component heat sink, a maximum stable temperature Tcmax3 at which the low-power liquid crystal panel component operates is represented by equation (4):
Tcmax3＝TJ-P*RJA(4)
wherein RJA is the thermal resistance between the heat source junction of the component and the environment.
The second aspect of the invention provides a liquid crystal display temperature adaptive control system for a special vehicle, which comprises:
the liquid crystal screen component thermal resistance acquisition module is used for confirming the heating coefficient of the components according to the printed circuit board, the components and the type selection of the components of the vehicle-mounted liquid crystal screen and obtaining the resistance of the liquid crystal screen components on a heat flow path;
the simulation model establishing module is used for carrying out thermal simulation on the work of the liquid crystal screen according to the arrangement position of the vehicle-mounted liquid crystal screen on the vehicle to obtain a thermal simulation data model of the work of the liquid crystal screen;
the component parameter acquisition module is used for acquiring the thermal resistance of a heat source junction of the liquid crystal screen component and a component packaging shell and the power consumption of the component in a normal temperature state according to the specification of the semiconductor component;
the component heating acquisition module is used for calculating the heating of the components on the heat flow path according to the resistance of the liquid crystal screen components on the heat flow path, the heat resistance of the heat source junctions of the components and the component packaging shell and the power consumption of the liquid crystal screen components in the normal temperature state;
the maximum stable temperature acquisition module for the operation of the components is used for calculating the maximum stable temperature of the operation of the liquid crystal screen components according to the temperature rise of the liquid crystal screen components on the heat flow path;
the thermal simulation result acquisition module is used for substituting the maximum stable working temperature of the liquid crystal screen components into the thermal simulation data model to acquire the thermal simulation result of the liquid crystal screen;
the liquid crystal screen complete non-working temperature range acquisition module is used for reversely simulating according to a liquid crystal screen working thermal simulation result to acquire a liquid crystal screen complete non-working temperature range;
the liquid crystal display full-time domain normal display adjusting module is used for adaptively adjusting the brightness of a liquid crystal display screen according to the temperature range in which the liquid crystal display screen can not work completely, so that the normal display function of the liquid crystal display screen in a full-time global scene is realized; and
the thermal balance test verification module is used for carrying out a thermal balance test of the liquid crystal screen on the vehicle under the scenes of high temperature and high cold limit temperature and verifying the accuracy of the scheme.
A third aspect of the present invention provides an electronic device, comprising: at least one processor, at least one memory, and a communication interface; wherein the content of the first and second substances,
the processor, the memory and the communication interface are communicated with each other;
the memory stores program instructions which can be executed by the processor, and the program instructions are called by the processor to execute the liquid crystal display temperature adaptive control method for the special vehicle provided by any one of the various implementation manners of the first aspect of the invention.
A fourth aspect of the present invention provides a non-transitory computer-readable storage medium, wherein the non-transitory computer-readable storage medium stores computer instructions that cause the computer to execute the liquid crystal display temperature adaptive control method for a special vehicle provided in any one of the various implementation manners of the first aspect of the present invention.
In general, compared with the prior art, the above technical solutions conceived by the present invention can achieve the following beneficial effects:
(1) The invention relates to a liquid crystal display temperature self-adaptive control method for a special vehicle, which is characterized in that a drive circuit is optimally controlled in a low-temperature state and a high-temperature state, the self-adaptive adjustment of the brightness of a liquid crystal display screen is realized by combining the algorithm simulation calibration and the simulation calculation of an ultra-wide temperature zone, and the normal display function guarantee of the liquid crystal display screen in a full-time global scene is realized by increasing or reducing the self temperature of the screen backlight.
(2) According to the liquid crystal display temperature self-adaptive control method for the special vehicle, optimization design is carried out at the initial development stage of a vehicle-mounted display control system, front-end reasonable design is achieved through optimization circuit design, algorithm control and simulation verification, and difficulty in matching and reliability risk of a rear-end loading system are avoided.
(3) According to the liquid crystal display temperature self-adaptive control method for the special vehicle, a hardware heating system or a cooling system does not need to be additionally arranged, the temperature rise parameter characteristics of each component are analyzed and matched through accurate thermal temperature field simulation calculation, the power consumption output of the liquid crystal display is controlled through software algorithm optimization, the self-adjustment under the extremely cold condition is realized, the power consumption is improved, and the working temperature of the system is increased through means such as screen system display brightness improvement; get into lower consumption mode through the self-regulation under high temperature environment, realize self-heating and reduce, reduce self operating temperature to realize full time universe function normal and do not increase extra auxiliary heating, the cost is reduced on the whole.
Drawings
FIG. 1 is a schematic flow chart of a liquid crystal display temperature self-adaptive control method for a special vehicle according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a simulation model of the installation and arrangement positions of the liquid crystal display screen in the adaptive temperature control method for the special vehicle according to the embodiment of the invention;
FIG. 3 is a schematic diagram of thermal simulation calculation of a liquid crystal display temperature adaptive control method for a special vehicle according to an embodiment of the present invention;
FIG. 4 is a schematic flow chart of a liquid crystal display temperature self-adaptive control method for a special vehicle according to an embodiment of the present invention for obtaining a temperature range in which the liquid crystal display is completely inoperable;
FIG. 5 is a schematic diagram of a thermal simulation high temperature result of a liquid crystal display temperature adaptive control method for a special vehicle according to an embodiment of the present invention;
FIG. 6 is a schematic diagram illustrating a high temperature improvement result of a liquid crystal display temperature adaptive control method for a special vehicle according to an embodiment of the present invention;
FIG. 7 is a diagram illustrating the improvement result of the adaptive control method for the LCD panel temperature of the special vehicle according to the embodiment of the present invention;
fig. 8 is a schematic flow chart of a liquid crystal display temperature adaptive control method for a special vehicle according to an embodiment of the present invention, wherein the liquid crystal display temperature adaptive control method adaptively adjusts the brightness of a liquid crystal display according to a temperature range in which the liquid crystal display is completely inoperable;
FIG. 9 is a schematic structural diagram of a liquid crystal display temperature adaptive control system for a special vehicle according to an embodiment of the present invention;
fig. 10 is a schematic physical structure diagram of an electronic device according to an embodiment of the invention.
PCB: printed Circuit Board.
Tc: temperature Case, the Case Temperature of the components.
TJ: temperature Junction, junction Temperature within the component.
RJA: the Junction to Ambient represents the total thermal resistance from the heat source Junction (Junction) of the component to the surrounding cooling air (Ambient), and the temperature rise of the component is obtained by multiplying the total thermal resistance by the calorific value of the heat source Junction (Junction) of the component.
RJC: and (3) connecting to Case, which represents the thermal resistance between the heat source Junction of the component and the component packaging shell, and the temperature difference between the heat source Junction and the component packaging shell is obtained by multiplying the thermal resistance by the calorific value.
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. In addition, the technical features involved in the respective embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present invention. Based on this recognition, each block in the flowchart or block diagrams may represent a module, a program segment, or a portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
As shown in fig. 1 to 8, a first aspect of the present invention provides a liquid crystal display temperature adaptive control method for a special vehicle, including the following steps:
s1: confirming the heating coefficients of the components according to the Printed Circuit Board (PCB) of the vehicle-mounted liquid crystal screen, the components and the type selection of the components, and obtaining the resistance of the components of the liquid crystal screen on a heat flow path; the resistance of the component on the heat flow path comprises a thermal resistance RCS from a component packaging shell to a component cooling fin, a thermal resistance RSA from the component cooling fin to the environment and a thermal resistance RJA between a heat source junction of the component and the environment; the resistance of heat on the heat flow path is the magnitude of the heat transfer capacity between media, and indicates the magnitude of temperature rise caused by 1W of heat, and the unit is ℃/W or K/W. Multiplying thermal power consumption by thermal resistance to obtain the temperature rise on the heat transfer path;
s2: carrying out thermal simulation on the work of the liquid crystal screen according to the arrangement position of the vehicle-mounted liquid crystal screen on the vehicle to obtain a thermal simulation data model (shown in figure 2) of the work of the liquid crystal screen;
s3, obtaining the thermal resistance RJC between the heat source junction of the liquid crystal screen component and the component packaging shell and the power consumption P of the component in a normal temperature state according to the specification of the semiconductor component;
s4, calculating the temperature rise of the liquid crystal screen component on the heat flow path according to the resistance of the liquid crystal screen component on the heat flow path, the thermal resistance RJC of the heat source junction of the component and the component packaging shell and the power consumption P of the liquid crystal screen component in the normal temperature state;
s5, calculating the maximum working stable temperature of the liquid crystal screen component according to the temperature rise of the liquid crystal screen component on the heat flow path (as shown in figure 3); the liquid crystal screen components comprise liquid crystal screen components with component radiating fins and liquid crystal screen components without component radiating fins; the liquid crystal screen components without component radiating fins comprise high-power liquid crystal screen components and low-power liquid crystal screen components;
for a liquid crystal screen component with a component radiating fin, such as a liquid crystal screen main component MCU, the maximum stable temperature Tcmax1 of the liquid crystal screen component in work is expressed by the formula (1):
Tcmax1＝TJ-P*(RJC+RCS+RSA) (1)
wherein TJ is the heat source junction temperature of the component; p is power consumption (usually 25 °) of the component at normal temperature; RJC is the thermal resistance between a heat source junction of the component and a component packaging shell; RCS is the thermal resistance from the packaging shell of the component to the radiating fin of the component; RSA represents the thermal resistance of the component heat sink to the environment;
the thermal resistance between the component packaging shell and the environment is calculated by the formula (2):
RCA＝RCS+RSA＝0(2)；
for the liquid crystal screen component without the component radiating fin, the maximum stable temperature Tcmax2 of the high-power liquid crystal screen component is represented by formula (3):
Tcmax2＝TJ-P*(RJC+RCA) (3)
wherein: RCA is the thermal resistance between the packaging shell of the component and the environment;
for the liquid crystal screen component without the component radiating fin, the maximum stable temperature Tcmax3 of the small-power liquid crystal screen component is represented by the formula (4):
Tcmax3＝TJ-P*RJA (4)
wherein RJA is the thermal resistance between the heat source junction of the component and the environment;
s6, substituting the maximum stable working temperature of the liquid crystal screen components into the thermal simulation data model to obtain a thermal simulation result of the liquid crystal screen;
s7: reversely simulating according to the working thermal simulation result of the liquid crystal screen to obtain the temperature range (as shown in FIG. 4) in which the liquid crystal screen can not work at all; the method specifically comprises the following steps:
s71: calculating the maximum stable temperature of the vehicle-mounted liquid crystal screen at the highest ambient temperature (as shown in fig. 5, a thermal simulation high-temperature result);
s72: according to the heating coefficient corresponding to the components in the component specification under the rated power, the backlight is turned down to reduce the actual power of the components of the liquid crystal screen, so that the components enter a low power consumption mode; obtaining the maximum ambient temperature of the liquid crystal screen when the liquid crystal screen works at the maximum stable temperature according to the temperature saving temperature reverse simulation in the component specification, and recording the maximum ambient temperature as T1 (for example, FIG. 6 is a thermal simulation high temperature improvement result);
s73: according to the maximum heating coefficient of the components in the specification of the components at the maximum power, performing simulation calculation on the components from the lowest working temperature to the lower temperature direction step by step to obtain the lowest working temperature which can be obtained by heating when the liquid crystal screen works at a low temperature state, and recording the lowest working temperature as T2 (for example, a thermal simulation low-temperature improvement result is shown in FIG. 7);
s74: obtaining a temperature range in which the liquid crystal screen can not work completely according to the maximum environment temperature of the liquid crystal screen obtained in the step S32 when the liquid crystal screen works at the maximum stable temperature and the minimum working temperature obtained in the step S33 when the liquid crystal screen works at a low temperature through heating;
s8: the brightness of the liquid crystal display screen is adaptively adjusted according to the temperature range in which the liquid crystal display screen can not work completely, and the normal display function of the liquid crystal display screen under the full-time global scene is realized; specifically, according to the temperature range in which the liquid crystal screen cannot work at all, the actual working temperature of the liquid crystal screen is compared with the maximum ambient temperature of the liquid crystal screen when the liquid crystal screen works at the maximum stable temperature and the minimum working temperature which can be obtained by heating when the liquid crystal screen works at a low temperature, and the brightness of the liquid crystal screen display screen is adaptively adjusted according to the comparison result, so that the normal display function of the liquid crystal screen under the full-time global scene is realized (as shown in fig. 8); the method specifically comprises the following steps:
s81, detecting and acquiring the actual working temperature of the liquid crystal screen through a temperature sensor on a liquid crystal screen component;
s82, judging whether the actual working temperature of the liquid crystal screen is higher than the maximum environment temperature of the liquid crystal screen when the liquid crystal screen works at the maximum stable temperature; if yes, controlling the liquid crystal display screen to enter a low power consumption mode through software, reducing the brightness of the liquid crystal display screen, and repeating the steps S81 and S82; otherwise, executing the next step;
s83, judging whether the actual working temperature of the liquid crystal screen is lower than the lowest working temperature which can be obtained by heating when the liquid crystal screen works in a low-temperature state; if so, controlling the liquid crystal display screen to enable the screen brightness of the liquid crystal display screen to be maximum through software, and entering a maximum power working state; otherwise, executing the next step;
and S84, controlling the liquid crystal display screen to enter a low power consumption mode through software, and simultaneously reducing the brightness of the liquid crystal display screen.
When the actual working temperature of the liquid crystal screen is higher than the maximum environment temperature T1 of the liquid crystal screen working at the maximum stable temperature, the liquid crystal screen display screen is controlled by software to enter a low power consumption mode and simultaneously the brightness of the liquid crystal screen display screen is reduced; when the actual working temperature of the liquid crystal screen is lower than the lowest working temperature T2 which can be obtained by heating when the liquid crystal screen works in a low-temperature state, controlling the display screen of the liquid crystal screen by software to enable the display screen to enter a maximum power working state; when the actual working temperature of the liquid crystal screen reaches the lowest working temperature T2 which can be obtained by heating when the liquid crystal screen works in a low-temperature state, controlling the liquid crystal screen display screen to enter a low-power-consumption mode through software, and simultaneously reducing the brightness of the liquid crystal screen display screen; the normal display function guarantee of the liquid crystal display screen in the full-time global scene is realized by increasing or reducing the temperature of the backlight of the liquid crystal screen;
s9: and (5) carrying out a heat balance test of the scheme in the steps S1 to S8 on the vehicle under the scenes of high temperature and high cold limit temperature, and verifying the accuracy of the scheme.
The implementation basis of the embodiment of the invention is realized by carrying out programmed processing through equipment with a processor function; therefore, in engineering practice, the technical solutions and functions thereof of the embodiments of the present invention can be packaged into various modules; based on the practical situation, as shown in fig. 9, a second aspect of the present invention provides a liquid crystal panel temperature adaptive control system for a special vehicle, including a liquid crystal panel component thermal resistance obtaining module, configured to determine a heating coefficient of a component according to a type selection of a printed circuit board, the component, and the component of a vehicle-mounted liquid crystal panel, and obtain a resistance encountered by the liquid crystal panel component on a heat flow path; the simulation model establishing module is used for carrying out thermal simulation on the work of the liquid crystal screen according to the arrangement position of the vehicle-mounted liquid crystal screen on the vehicle to obtain a thermal simulation data model of the work of the liquid crystal screen; the component parameter acquisition module is used for acquiring the thermal resistance of a heat source junction of the liquid crystal screen component and a component packaging shell and the power consumption of the component in a normal temperature state according to the specification of the semiconductor component; the component heating acquisition module is used for calculating the heating of the components on the heat flow path according to the resistance of the liquid crystal screen components on the heat flow path, the heat resistance of the heat source junctions of the components and the component packaging shell and the power consumption of the liquid crystal screen components in the normal temperature state; the maximum stable temperature acquisition module for the operation of the components is used for calculating the maximum stable temperature of the operation of the liquid crystal screen components according to the temperature rise of the liquid crystal screen components on the heat flow path; the thermal simulation result acquisition module is used for substituting the maximum stable working temperature of the liquid crystal screen components into the thermal simulation data model to acquire the thermal simulation result of the liquid crystal screen; the liquid crystal screen complete non-working temperature range acquisition module is used for reversely simulating according to a liquid crystal screen working thermal simulation result to acquire a liquid crystal screen complete non-working temperature range; the liquid crystal display full-time domain normal display adjusting module is used for adaptively adjusting the brightness of the liquid crystal display screen according to the temperature range in which the liquid crystal display screen can not work completely, and realizing the normal display function of the liquid crystal display screen in a full-time domain scene; and the thermal balance test verification module is used for carrying out a thermal balance test of the liquid crystal screen on the vehicle under the scenes of high temperature and high cold limit temperature and verifying the accuracy of the scheme.
The measuring method of the first aspect of the present invention is implemented by an electronic device, and as shown in fig. 10, a third aspect of the present invention provides an electronic device, including: the system comprises at least one processor (processor), a communication Interface (Communications Interface), at least one memory (memory) and a communication bus, wherein the at least one processor, the communication Interface and the at least one memory are communicated with each other through the communication bus; the at least one processor may invoke logic instructions in the at least one memory to perform all or a portion of the steps of the methods provided by the various method embodiments described above; that is, the memory stores program instructions executable by the processor, and the processor calls the program instructions to execute the liquid crystal display temperature adaptive control method for the special vehicle provided by any one of the various implementation modes of the first aspect.
The logic instructions in the at least one memory may be implemented in software functional units and stored in a computer readable storage medium when sold or used as a stand-alone product. Based on such understanding, a fourth aspect of the present invention provides a non-transitory computer-readable storage medium for storing computer instructions, by which a computer executes the liquid crystal panel temperature adaptive control method for a special vehicle provided in any one of the various implementation manners of the first aspect; the technical solution of the present invention, which is substantially or partly contributed to by the prior art, may be embodied in a software product, where the computer software product is stored in a storage medium and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method described in the method embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk, and various media capable of storing program codes.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort. Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. Based on the understanding, the above technical solutions substantially or otherwise contributing to the prior art may be embodied in the form of a software product, which may be stored in a computer-readable storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the various embodiments or some parts of the embodiments.
The invention provides a liquid crystal screen temperature self-adaptive control method for special vehicles, which is characterized in that a drive circuit is optimally controlled in a low-temperature state and a high-temperature state, and algorithm simulation calibration and simulation calculation of an ultra-wide temperature zone are carried out, so that self-adaptive adjustment of the brightness of a liquid crystal screen display screen is realized, and the normal display function guarantee of the liquid crystal screen in a full-time global scene is realized by increasing or reducing the self temperature of screen backlight; the method carries out optimization design at the initial development stage of the vehicle-mounted display and control system, realizes front-end reasonable design through optimization circuit design, algorithm control and simulation verification, and avoids difficult matching and reliability risk of a rear-end loading system.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A liquid crystal screen temperature self-adaptive control method for a special vehicle is characterized by comprising the following steps:
s1: confirming the heating coefficients of the components according to the printed circuit board, the components and the type selection of the components of the vehicle-mounted liquid crystal screen, and obtaining the resistance of the components of the liquid crystal screen on a heat flow path;
s2: carrying out thermal simulation on the work of the liquid crystal screen according to the arrangement position of the vehicle-mounted liquid crystal screen on the vehicle to obtain a thermal simulation data model of the work of the liquid crystal screen;
s3, obtaining the thermal resistance of a heat source junction of the liquid crystal screen component and a component packaging shell and the power consumption of the component in a normal temperature state according to the specification of the semiconductor component;
s4, calculating the temperature rise of the liquid crystal screen component on the heat flow path according to the resistance of the liquid crystal screen component on the heat flow path, the heat resistance of a heat source junction of the component and a component packaging shell and the power consumption of the liquid crystal screen component in a normal temperature state;
s5, calculating the maximum working stable temperature of the liquid crystal screen component according to the temperature rise of the liquid crystal screen component on the heat flow path;
s6, substituting the maximum stable working temperature of the liquid crystal screen components into the thermal simulation data model to obtain a thermal simulation result of the liquid crystal screen;
s7: reversely simulating according to the working thermal simulation result of the liquid crystal screen to obtain the temperature range in which the liquid crystal screen can not work completely;
s8: the brightness of the liquid crystal display screen is adaptively adjusted according to the temperature range in which the liquid crystal display screen can not work completely, and the normal display function of the liquid crystal display screen under the full-time global scene is realized;
s9: and (5) carrying out a heat balance test of the scheme in the steps S1 to S8 on the vehicle under the scenes of high temperature and high cold limit temperature, and verifying the accuracy of the scheme.
2. The adaptive temperature control method for the liquid crystal display panel of the special vehicle as claimed in claim 1, wherein the obtaining of the temperature range in which the liquid crystal display panel is completely inoperable in step S7 comprises:
s71: calculating the maximum stable temperature of the vehicle-mounted liquid crystal screen at the highest ambient temperature;
s72: according to the heating coefficient corresponding to the components in the component specification under the rated power, the backlight is turned down to reduce the actual power of the components of the liquid crystal screen, so that the components enter a low power consumption mode; obtaining the maximum environment temperature of the liquid crystal screen when the liquid crystal screen works at the maximum stable temperature according to the temperature saving reverse simulation in the component specification;
s73: according to the maximum heating coefficient of the components in the specification of the components at the maximum power, performing simulation calculation on the components from the lowest working temperature to a lower temperature direction step by step to obtain the lowest working temperature which can be obtained by heating when the liquid crystal screen works at a low temperature;
s74: and obtaining the temperature range in which the liquid crystal screen can not work completely according to the maximum environment temperature of the liquid crystal screen when the liquid crystal screen works at the maximum stable temperature and the minimum working temperature which can be obtained by heating when the liquid crystal screen works at a low temperature.
3. The liquid crystal display temperature self-adaptive control method for the special vehicle as claimed in claim 2, wherein the step S8 further comprises:
s81, detecting and acquiring the actual working temperature of the liquid crystal screen through a temperature sensor on a liquid crystal screen component;
s82, judging whether the actual working temperature of the liquid crystal screen is higher than the maximum environment temperature of the liquid crystal screen when the liquid crystal screen works at the maximum stable temperature; if yes, controlling the liquid crystal display screen to enter a low power consumption mode through software, reducing the brightness of the liquid crystal display screen, and repeating the steps S81 and S82; otherwise, executing the next step;
s83, judging whether the actual working temperature of the liquid crystal screen is lower than the lowest working temperature which can be obtained by heating when the liquid crystal screen works in a low-temperature state; if so, controlling the liquid crystal display screen to enable the screen brightness of the liquid crystal display screen to be maximum through software, and entering a maximum power working state; otherwise, executing the next step;
and S84, controlling the liquid crystal display screen to enter a low power consumption mode through software, and simultaneously reducing the brightness of the liquid crystal display screen.
4. The liquid crystal display temperature self-adaptive control method for the special vehicle as claimed in any one of claims 1 to 3, wherein the liquid crystal display components in the step S1 comprise a liquid crystal display component with component cooling fins and a liquid crystal display component without component cooling fins; the liquid crystal screen components without the component radiating fins comprise high-power liquid crystal screen components and low-power liquid crystal screen components.
5. The self-adaptive control method for the temperature of the liquid crystal display panel for the special vehicle as claimed in claim 4, wherein for the liquid crystal display panel component with the component cooling fin, the maximum stable temperature Tcmax1 of the liquid crystal display panel component in operation is expressed by the following formula (1):
Tcmax1＝TJ-P*(RJC+RCS+RSA) (1)
wherein TJ is the heat source junction temperature of the component; p is the power consumption of the component in the normal temperature state; RJC is the temperature difference between a heat source junction of the component and a component packaging shell; RCS is the thermal resistance from the packaging shell of the component to the radiating fin of the component; RSA represents the thermal resistance of the component heat sink to the environment;
the thermal resistance RCA between the component packaging shell and the environment is calculated by the formula (2):
RCA＝RCS+RSA＝0(2)。
6. the self-adaptive liquid crystal display temperature control method for special vehicles as claimed in claim 5, wherein for a liquid crystal display component without a component cooling fin, the maximum stable temperature Tcmax2 of the high-power liquid crystal display component operation is represented by formula (3):
Tcmax2＝TJ-P*(RJC+RCA) (3)
wherein: RCA is the thermal resistance between the package casing and the environment.
7. The self-adaptive control method for the temperature of the liquid crystal display panel of the special vehicle as claimed in claim 6, wherein for the liquid crystal display panel component without a component cooling fin, the maximum stable temperature Tcmax3 of the low-power liquid crystal display panel component is represented by formula (4):
Tcmax3＝TJ-P*RJA(4)
wherein RJA is the thermal resistance between the heat source junction of the component and the environment.
8. The liquid crystal display temperature adaptive control system for the special vehicle is characterized by being used for realizing the liquid crystal display temperature adaptive control method for the special vehicle according to any one of claims 1 to 7, and comprising the following steps:
the liquid crystal screen component thermal resistance acquisition module is used for confirming the heating coefficient of the components according to the printed circuit board, the components and the type selection of the components of the vehicle-mounted liquid crystal screen and obtaining the resistance of the liquid crystal screen components on a heat flow path;
the simulation model establishing module is used for carrying out thermal simulation on the work of the liquid crystal screen according to the arrangement position of the vehicle-mounted liquid crystal screen on the vehicle to obtain a thermal simulation data model of the work of the liquid crystal screen;
the component parameter acquisition module is used for acquiring the thermal resistance of a heat source junction of the liquid crystal screen component and a component packaging shell and the power consumption of the component in a normal temperature state according to the specification of the semiconductor component;
the component heating acquisition module is used for calculating the heating of the components on the heat flow path according to the resistance of the liquid crystal screen components on the heat flow path, the heat resistance of the heat source junctions of the components and the component packaging shell and the power consumption of the liquid crystal screen components in the normal temperature state;
the maximum stable temperature acquisition module for the operation of the components is used for calculating the maximum stable temperature of the operation of the liquid crystal screen components according to the temperature rise of the liquid crystal screen components on the heat flow path;
the thermal simulation result acquisition module is used for substituting the maximum stable working temperature of the liquid crystal screen components into the thermal simulation data model to acquire the thermal simulation result of the liquid crystal screen;
the liquid crystal screen complete non-working temperature range acquisition module is used for reversely simulating according to a liquid crystal screen working thermal simulation result to acquire a liquid crystal screen complete non-working temperature range;
the liquid crystal display full-time domain normal display adjusting module is used for adaptively adjusting the brightness of the liquid crystal display screen according to the temperature range in which the liquid crystal display screen can not work completely, and realizing the normal display function of the liquid crystal display screen in a full-time domain scene; and
the thermal balance test verification module is used for carrying out a thermal balance test of the liquid crystal screen on the vehicle under the scenes of high temperature and high cold limit temperature and verifying the accuracy of the scheme.
9. An electronic device, comprising: at least one processor, at least one memory, and a communication interface; wherein, the first and the second end of the pipe are connected with each other,
the processor, the memory and the communication interface are in communication with each other;
the memory stores program instructions executable by the processor, and the program instructions are called by the processor to execute the liquid crystal display temperature adaptive control method for the special vehicle as claimed in any one of claims 1 to 7.
10. A non-transitory computer-readable storage medium storing computer instructions for causing a computer to execute the lcd panel temperature adaptive control method for a special vehicle according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211164281.5A CN115657471A (en) | 2022-09-23 | 2022-09-23 | Liquid crystal screen temperature self-adaptive control method and equipment for special vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211164281.5A CN115657471A (en) | 2022-09-23 | 2022-09-23 | Liquid crystal screen temperature self-adaptive control method and equipment for special vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115657471A true CN115657471A (en) | 2023-01-31 |
Family
ID=84984984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211164281.5A Pending CN115657471A (en) | 2022-09-23 | 2022-09-23 | Liquid crystal screen temperature self-adaptive control method and equipment for special vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115657471A (en) |
-
2022
- 2022-09-23 CN CN202211164281.5A patent/CN115657471A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107833568B (en) | Screen brightness adjusting method and device and display terminal | |
| US10209145B2 (en) | Failure diagnosis method and system of temperature sensor of switch device | |
| CN103047027B (en) | A kind of engine control and device | |
| US20120176115A1 (en) | Power supply controller | |
| CN109782827A (en) | Cooling control method and equipment, electronic equipment and computer readable storage medium | |
| US11328580B2 (en) | Testing of a network of hazard warning devices | |
| US20160299551A1 (en) | Method and controller for power throttling upon system on portable device, corresponding portable device, and corresponding computer program products | |
| CN110907726B (en) | Vehicle controller thermal test system and method | |
| CN105319009A (en) | System and method for correcting offset of pressure sensor | |
| JP5428810B2 (en) | Remaining life estimation method and remaining life estimation system | |
| KR102634812B1 (en) | Method, apparatus and electronic device for estimating screen light leakage amount | |
| CN105302179A (en) | Thermal control method and thermal control system | |
| CN115657471A (en) | Liquid crystal screen temperature self-adaptive control method and equipment for special vehicle | |
| US9651600B2 (en) | Power up detecting system | |
| KR20150009312A (en) | Temperature management system of battery pack and method thereof | |
| JP2020008480A (en) | Temperature sensor abnormality determination device and temperature sensor abnormality determination method | |
| CN110739902B (en) | Motor temperature sensor fault processing method and device | |
| CN109921397A (en) | Overcurrent protection method and system | |
| KR20190088017A (en) | Monitoring apparatus for a cooling apparatus | |
| CN113586503A (en) | Serial connection control method of multiple fan speed regulation modules and system for realizing method | |
| CN219456392U (en) | High-low temperature testing device for chip | |
| CN114856792B (en) | Fan rotating speed control method, device, equipment and readable storage medium | |
| CN114635782B (en) | Troubleshooting method of vehicle cooling system and related equipment | |
| US20240118347A1 (en) | Method and Apparatus for Monitoring Parameter of Battery Pack, and Storage Medium | |
| US20240056752A1 (en) | Device and method for controlling virtual engine sound |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |