CN105636304A - Method, device and system for adjusting vehicle backlight brightness - Google Patents
Method, device and system for adjusting vehicle backlight brightness Download PDFInfo
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- CN105636304A CN105636304A CN201410640440.3A CN201410640440A CN105636304A CN 105636304 A CN105636304 A CN 105636304A CN 201410640440 A CN201410640440 A CN 201410640440A CN 105636304 A CN105636304 A CN 105636304A
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Abstract
The invention provides a method, a device and a system for adjusting vehicle backlight brightness. The method for adjusting brightness comprises following steps: detecting instructions of adjusting backlight brightness; obtaining corresponding adjusting control identifications from the instructions; sending the adjusting control identifications to display device controllers to make the display device controllers obtain corresponding target brightness values according to a preset mapping relation and send driving instructions to corresponding LED driving circuits to drive an LED to emit light with corresponding brightness. By use of the method, the device, and the system, the demand for adjusting vehicle backlight brightness can be better satisfied.
Description
Technical field
The present invention relates to technical field of automotive electronics, particularly relate to a kind of car load back light brightness regulating method, Apparatus and system.
Background technology
Along with the development of the progress of technology and automobile industry, the requirement of people's comfortableness to driving is more and more higher. The backlight illumination of each display device in Automobile, for instance instrument board, the amusement backlight such as main frame, switch, is best able to, as user, the part that direct feeling arrives, receives increasingly higher concern.
Existing automobile backlight has brightness unadjustable and two kinds of backlights of brightness scalable. The uncontrollable backlight of brightness includes two kinds, and one is that backlight illumination is just provided with before vehicle release, and brightness value is fixed, and user is difficult to backlight illumination is adjusted. Another kind is the pattern that backlight illumination is divided into day mode two kinds different with Night, and user can select as required.
For the adjustable automobile backlight of brightness, user can unify to adjust the brightness that in car, the brightness of all display devices is extremely same, although easy to adjust, but still cannot meet some demand of user, for instance safety etc., improves Consumer's Experience.
Summary of the invention
The problem that the embodiment of the present invention solves is how to regulate car load backlight illumination to meet user's request better.
For solving the problems referred to above, the embodiment of the present invention provides a kind of car load back light brightness regulating method, including: the instruction of detection adjusting backlight luminance; Corresponding regulable control mark is obtained from described regulating command; Described regulable control mark is respectively sent to each display device controller, make each display device controller described according to the mapping relations preset, obtain the target brightness value of correspondence respectively, and send driving instruction to corresponding LED drive circuit, to drive described LED to send the light of corresponding brightness.
Optionally, described target brightness value is the dutyfactor value of pulse width modulation wave.
Optionally, described default mapping relations are: the mapping curve of regulated value and the described target brightness value of the described backlight illumination preset, and described mapping curve is stored in each display device controller, described mapping curve and display device one_to_one corresponding.
Optionally, the described LED drive circuit transmission to each display device comprises the driving instruction of corresponding target brightness value, drives described LED to send the light of corresponding brightness, also includes: the target brightness value in described driving instruction is carried out gradual change Filtering Processing.
For solving the problems referred to above, the embodiment of the present invention additionally provides a kind of car load backlight illumination and regulates device, including: detection unit, for detecting the instruction of adjusting backlight luminance; First acquiring unit, for obtaining corresponding regulable control mark from described regulating command; Transmitting element, is respectively sent to each display device controller by described regulable control mark; Each display device controller described, according to the mapping relations preset, obtains the target brightness value of correspondence respectively, sends driving instruction to corresponding LED drive circuit, to drive described LED to send the light of corresponding brightness.
Optionally, described car load backlight illumination regulates device and also includes: filter unit, for the target brightness value in described driving instruction is carried out gradual change Filtering Processing.
The embodiment of the present invention additionally provides a kind of car load backlight illumination and regulates system, including: brightness regulator; Controller, is suitable to receive the backlight illumination adjustment signal that described brightness regulator produces, described backlight illumination is regulated signal and processes, generate the instruction of adjusting backlight luminance, and send the instruction of described adjusting backlight luminance to multiple display devices; Multiple display devices, be suitable to receive the instruction of the described adjusting backlight luminance that described controller sends, regulable control mark is obtained from the instruction of described adjusting backlight luminance, according to default mapping relations, obtain the target brightness value of correspondence respectively, and send driving instruction to corresponding LED drive circuit, drive described LED to send the light of corresponding brightness.
Optionally, described controller includes: A/D sample circuit, and the backlight illumination being suitable to that described brightness regulator is produced regulates signal and samples, and obtains the digital signal of correspondence; Signal processor, is suitable to described digital signal is processed, and generates the instruction of adjusting backlight luminance; CAN transceiver, is suitable to be respectively sent to the instruction of adjusting backlight luminance the controller of each display device.
Optionally, the plurality of display device, including: CAN transceiver, be suitable to receive the instruction of described adjusting backlight luminance; Memorizer, is suitable to the mapping relations storing regulable control mark corresponding to each display device with target brightness value; Processor, is suitable to obtain regulable control mark from the instruction of described adjusting backlight luminance, according to the mapping relations of storage in described memorizer, obtains corresponding target brightness value; LED drive circuit, is suitable to receive corresponding target brightness value, drives described LED to send the light of corresponding brightness.
Compared with prior art, the technical scheme of the embodiment of the present invention has the advantage that
After the regulable control getting backlight illumination identifies, the controller of each display device, according to the corresponding relation preset, obtains corresponding target brightness value, and drives LED circuit to send the light of corresponding brightness. By to default mapping relations adjustment, identify relative to same regulable control, the target brightness value that different display devices obtains can be different, and the brightness of the light that different display devices sends is also just different, therefore can meet user's demand to vehicle backlight illumination.
Further, by the target brightness value in driving instruction is carried out gradual change Filtering Processing, slow down brightness value and change to the speed of target brightness value from present intensity value, it is to avoid brightness flop excessive velocities and cause that the situation of human eye temporary blindness occurs.
Accompanying drawing explanation
Fig. 1 is the flow chart of a kind of car load back light brightness regulating method in the embodiment of the present invention;
Fig. 2 is the structural representation that a kind of car load backlight illumination in the embodiment of the present invention regulates device;
Fig. 3 is the structural representation that a kind of car load backlight illumination in the embodiment of the present invention regulates system;
Fig. 4 is that corresponding the adjusting of a kind of display device in the embodiment of the present invention controls to identify the mapping curve with target brightness value.
Detailed description of the invention
Existing automobile backlight has brightness unadjustable and two kinds of backlights of brightness scalable. For the adjustable automobile backlight of brightness, user can unify to adjust the brightness that in car, the brightness of all display devices is extremely same.
At present, brightness adjustable automobile backlight is applied comparatively general in each vehicle. But, owing to the color of display device each in car is generally inconsistent, for instance, A display device is green, and B display device be redness, and the region that to be distributed in car different, and the brightness impression of the different colours of zones of different is differed by human eye. When the backlight light intensity of a certain display device of user's request is certain value, it is possible to the display device being not required to other also sends the light of respective strengths value, therefore the adjustable automobile backlight of existing brightness can not meet the demand of user.
In embodiments of the present invention, after the regulable control getting backlight illumination identifies, the controller of each display device, according to the corresponding relation preset, obtains corresponding target brightness value, and drives LED circuit to send the light of corresponding brightness. By to default mapping relations adjustment, identify relative to same regulable control, the target brightness value that different display devices obtains can be different, and the brightness of the light that different display devices sends is also just different, such that it is able to meet user's demand to vehicle backlight illumination.
Understandable for enabling the above-mentioned purpose of the embodiment of the present invention, feature and advantage to become apparent from, below in conjunction with accompanying drawing, specific embodiments of the invention are described in detail.
Step S101, the instruction of detection adjusting backlight luminance.
In being embodied as, the backlight illumination in car can be adjusted by user by the brightness regulator preset.
Brightness regulator can be adjusting knob, it is possible to by coming clockwise or counterclockwise correspondingly heighten or turn down backlight illumination. Brightness regulator can also be the touch screen on console, and the backlight illumination in car is adjusted by user by brightness regulation interface. Brightness regulator can also be other devices, as long as can backlight illumination in car be adjusted, does not do repeating one by one herein.
When user by brightness regulation parts to car in backlight illumination be adjusted time, vehicle control device can detect the instruction of adjusting backlight luminance, performs step S102.
Step S102, obtains corresponding regulable control mark from described regulating command.
In embodiments of the present invention, regulable control mark can be concrete regulable control value. Regulable control value can be the value that user is selected by rotary light adjustment knob, it is also possible to be the value that selected by touch screen of user. Such as, user's rotary light adjustment knob, rotate after terminating, the value that the light-control knob of selection is corresponding is 50, then regulable control value is 50.
After getting regulable control mark, it is possible to by controller local area network (ControllerAreaNetwork, CAN) network, regulable control mark is sent to each display device controller, perform step S103.
Step S103, sends described regulable control mark to each display device controller so that each display device controller described, according to the mapping relations preset, obtains the target brightness value of correspondence respectively.
In embodiments of the present invention, the mapping relations preset can be the mapping curve between regulated value and the target brightness value of backlight illumination, it is also possible to for the mapping table of the regulated value of backlight illumination and target brightness value. In an embodiment of the present invention, the mapping curve between the regulated value that mapping relations are backlight illumination and the target brightness value preset.
In an embodiment of the present invention, mapping curve can be saved in the controller of display device. For different display devices, default mapping curve can be identical, it is also possible to different. Therefore, for different mapping curves, the target brightness value that identical regulable control mark is corresponding can be identical, it is also possible to different. Different display devices according to personal like, can be arranged corresponding mapping curve by user, i.e. display device and mapping curve one_to_one corresponding.
In an embodiment of the present invention, user can pass through human-computer interaction interface (HumanMachineInterface, HMI) mapping curve that display device is corresponding is configured. Such as, the backlight illumination of display device each in car is configured by user by HMI, enter " backlight illumination adjustment " interface, according to personal like, successively instrument, amusement main frame, switch key, mapping curve that head up displays (HeadUpDisplay, HUD) is corresponding are configured.
After being provided with, determining that the mapping curve to arranging preserves on HMI, be respectively sent in the controller of corresponding display device by the mapping curve of preservation by CAN network, the controller of each display device preserves corresponding mapping curve.
Such as, the mapping curve of amusement main frame is configured by user on HMI, and after being provided with, user determines preservation mapping curve, and mapping curve is sent to the controller entertaining main frame by HMI by CAN network, and the controller of amusement main frame preserves mapping curve.
After receiving regulable control value, each display device according to the mapping relations of regulable control value Yu target brightness value, can obtain the target brightness value of correspondence. Due to each display device and mapping curve one_to_one corresponding, then relative to same regulable control value, the target brightness value that each display device controller gets can be different. Such as, relative to same regulable control value, the target brightness value that instrument gets is M, and entertaining the target brightness value that main frame gets is N.
In an embodiment of the present invention, target brightness value is pulse width modulation (PulseWidthModulation, the PWM) ripple of certain dutyfactor value, for instance, target brightness value is dutycycle be 80% PWM ripple.
Step S104, sends driving instruction to corresponding LED drive circuit, drives described LED to send the light of corresponding brightness.
In an embodiment of the present invention, after the controller of each display device gets the target brightness value of correspondence, can sending driving instruction to each self-corresponding light emitting diode (LED) drive circuit, driving instruction includes target brightness value. After LED drive circuit receives driving instruction, LED is driven to send the light that target brightness value is corresponding.
Such as, for same regulable control value, the target brightness value that the controller of instrument gets is dutycycle be 80% PWM ripple, the amusement target brightness value that gets of main frame is dutycycle be 70% PWM ripple, wherein, dutycycle be 100% PWM wave table be shown as the PWM ripple that display device can be driven to send high-high brightness. Therefore, the controller of instrument sends driving instruction to the LED drive circuit of instrument, the LED driving instrument sends the light that brightness is maximum luminousing brightness 80%, the controller of amusement main frame sends driving instruction to the LED drive circuit of amusement main frame, drives the LED of amusement main frame to send the light that brightness is maximum luminousing brightness 70%.
Below by citing, step S101��S104 is described in detail.
With reference to Fig. 4, x-axis is regulable control value, and y-axis is corresponding target brightness value. Display device includes instrument, amusement main frame and HUD, and the mapping curve of storage in instrument, amusement main frame and HUD is configured by user beforehand through HMI.
Wherein, broken line 401 is the mapping curve that instrument is corresponding, and is saved in the controller of instrument. Broken line 402 is the mapping curve that amusement main frame is corresponding, and is saved in the controller of amusement main frame. Broken line 403 is mapping curve corresponding in HUD, and is saved in the controller of HUD. It is known that corresponding to instrument, amusement main frame and HUD, default mapping curve all differs from Fig. 4.
Regulating light-control knob, rotating light-control knob to scale value is the position of 40, and namely regulable control value is 40. Backlight illumination is regulated signal and processes by controller, generates the instruction of adjusting backlight luminance, is respectively sent to the controller of instrument, amusement main frame and HUD. The controller of instrument, amusement main frame and HUD receives brightness adjustment control value respectively, and according to the mapping curve preset in Fig. 4, it is possible to the target brightness value obtaining instrument is 70, the target brightness value that target brightness value is 40, HUD of amusement main frame is 20.
The then PWM ripple that LED drive circuit output duty cycle is 70% of instrument so that the LED of instrument sends the brightness into maximum brightness value 70%. The PWM ripple that LED drive circuit output duty cycle is 40% of amusement main frame so that the LED of amusement main frame sends the brightness into maximum brightness value 40%. The PWM ripple that LED drive circuit output duty cycle is 20% of HUD so that the LED of HUD sends the brightness into high-high brightness to 20%.
When regulable control value is other values, the target brightness value that each display device is corresponding can also obtain according to the mapping curve in Fig. 4. In actual applications, for different mapping curves, it is possible to the x-axis of mapping curve is divided into different intervals. Such as, the x-axis of mapping curve corresponding for instrument is divided into [0,20], [20,40], [40,100] three intervals, the x-axis entertaining mapping curve corresponding to main frame is divided into [0,20], [20,40], [40,60], [60,80], [80,100] five intervals, mapping curve corresponding for HUD is divided into [0,40], [40,100] two intervals. After each display device gets regulable control value, it is possible to first judge the interval that regulable control value is residing in respective mapping curve.
Such as, regulable control value is a, then first judge the interval of regulable control value residing for a respectively, then according to the mapping curve preset, according to the linear relationship between 2 o'clock, can obtain the target brightness value b of correspondence. Computing formula is:
Wherein, xnFor the maximum in corresponding interval, xn-1It is the minima in corresponding interval, ynIt is xnCorresponding target brightness value, yn-1It is xn-1Corresponding target brightness value. Thus, as long as obtaining regulable control value, corresponding target brightness value can be obtained according to default mapping curve.
Such as, regulable control value is a=50, and corresponding to instrument, regulable control value is within [40,100] interval, by Fig. 4 it is known that xn-1=40, xn=100, yn-1=70, yn=100, respectively by xn-1��xn��yn-1��ynAnd a substitutes into above formula, it is possible to obtain target brightness value b=75.
Visible, after the regulable control getting backlight illumination identifies, the controller of each display device, according to the corresponding relation preset, obtains corresponding target brightness value, and drives LED circuit to send the light of corresponding brightness. By to default mapping relations adjustment, identifying relative to same regulable control, the target brightness value that different display devices obtains can be different, such that it is able to meet user's demand to vehicle backlight illumination.
In embodiments of the present invention, it is possible to there is following situation: instrument current brightness value is maximum luminousing brightness 20%, light-control knob is rotated operation by user, and the target brightness value that instrument gets is the 80% of maximum luminousing brightness. If directly the brightness of instrument adjusted to maximum luminousing brightness from the 20% of maximum luminousing brightness 80%, owing to LED luminance change is too fast, the brightness flop of moment may result in the situation of eyes of user temporary blindness and occurs, and there is potential safety hazard.
For above-mentioned situation, in an embodiment of the present invention, target brightness value in driving instruction has been carried out gradual change Filtering Processing, with certain step-length, the brightness value of instrument is adjusted, making the change of the brightness value of instrument is not the change of moment, but gradually be changed to target brightness value from present intensity value.
Such as, instrument current brightness value is maximum luminousing brightness 20%, after light-control knob is rotated operation by user, the target brightness value that instrument gets is the 80% of maximum luminousing brightness. Target brightness value in driving instruction is carried out gradual change Filtering Processing, and after gradual change Filtering Processing, the brightness value change procedure of instrument is: 20%��30%, 30%��40% ..., 70%��80%.
As can be seen here, by the target brightness value in driving instruction is carried out gradual change Filtering Processing, slow down brightness value and change to the speed of target brightness value from present intensity value, it is to avoid brightness flop excessive velocities and cause that the situation of human eye temporary blindness occurs.
The embodiment of the present invention additionally provides a kind of car load backlight illumination and regulates device 20, with reference to Fig. 2, including: detection unit 201, acquiring unit 202, transmitting element 203, wherein:
Detection unit 201, for receiving the instruction of adjusting backlight luminance;
Acquiring unit 202, for obtaining corresponding regulable control mark from described regulating command;
Transmitting element 203, for being respectively sent to each display device controller by described regulable control mark; Each display device controller described, according to the mapping relations preset, obtains the target brightness value of correspondence respectively, sends driving instruction to corresponding LED drive circuit, to drive described LED to send the light of corresponding brightness.
In being embodied as, described car load backlight illumination regulates device 20 and can also include: filter unit 204, for the target brightness value in described driving instruction carries out gradual change Filtering Processing, described filter unit 204 can be arranged in the controller of each display device.
The embodiment of the present invention additionally provides a kind of car load backlight illumination and regulates system 30, including: brightness regulator 301, controller 302 and multiple display device 303, wherein:
Controller 302 can be vehicle control device, electrically connects with brightness regulator 301. When user by brightness regulator 301 to car in backlight illumination be adjusted time, controller 302 receives the backlight illumination adjustment signal that brightness regulator 301 produces, backlight illumination is regulated signal process, generate the instruction of adjusting backlight luminance, and send to multiple display devices 303.
In an embodiment of the present invention, brightness regulator 301 can be provided with slide rheostat, by controlling the resistance of slide rheostat, select corresponding brightness control value. Controller 302 includes analog (A/D) sample circuit 3021, signal processor 3022 and CAN transceiver 3023, when brightness regulator 301 produces backlight illumination adjustment signal, by A/D sample circuit 3021, backlight illumination is regulated signal to sample, obtain the digital signal of correspondence. By digital signal input to signal processor 3022, generate the instruction of adjusting backlight luminance, by CAN transceiver 3023, the instruction of adjusting backlight luminance is respectively sent to each display device 303.
Multiple display devices 303, be suitable to receive the instruction of the adjusting backlight luminance that described controller sends, regulable control mark is obtained from the instruction of described adjusting backlight luminance, according to default mapping relations, obtain the target brightness value of correspondence respectively, and send driving instruction to corresponding LED drive circuit, drive described LED to send the light of corresponding brightness.
In an embodiment of the present invention, display device 303 may include that CAN transceiver 3031, memorizer 3032, processor 3033, LED drive circuit 3034 and LED3035. Wherein, CAN transceiver 3031 is suitable to receive the instruction of the adjusting backlight luminance that controller 302 sends. The instruction of the processor 3033 adjusting backlight luminance to receiving processes, and obtains regulable control mark, and the mapping relations according to the regulable control of storage in memorizer 3032 mark with target brightness value obtain corresponding target brightness value. LED drive circuit 3034, according to corresponding target brightness value, drives LED3035 to send the light of corresponding brightness.
One of ordinary skill in the art will appreciate that all or part of step in the various methods of above-described embodiment can be by the hardware that program carrys out instruction relevant and completes, this program can be stored in a computer-readable recording medium, and storage medium may include that ROM, RAM, disk or CD etc.
Although present disclosure is as above, but the present invention is not limited to this. Any those skilled in the art, without departing from the spirit and scope of the present invention, all can make various changes or modifications, and therefore protection scope of the present invention should be as the criterion with claim limited range.
Claims (9)
1. a car load back light brightness regulating method, described car load includes multiple display device, it is characterised in that including:
The instruction of detection adjusting backlight luminance;
Corresponding regulable control mark is obtained from described regulating command;
Described regulable control mark is respectively sent to each display device controller, make each display device controller described according to the mapping relations preset, obtain the target brightness value of correspondence respectively, and send driving instruction to corresponding LED drive circuit, to drive described LED to send the light of corresponding brightness.
2. car load back light brightness regulating method as claimed in claim 1, it is characterised in that described target brightness value is the dutyfactor value of pulse width modulation wave.
3. car load back light brightness regulating method as claimed in claim 1, it is characterized in that, described default mapping relations are: the regulated value of the described backlight illumination preset and the mapping curve of described target brightness value, described mapping curve is stored in each display device controller, described mapping curve and display device one_to_one corresponding.
4. car load back light brightness regulating method as claimed in claim 1, it is characterized in that, the described LED drive circuit transmission to each display device comprises the driving instruction of corresponding target brightness value, drive described LED to send the light of corresponding brightness, also include: the target brightness value in described driving instruction is carried out gradual change Filtering Processing.
5. a car load backlight illumination regulates device, it is characterised in that including:
Detection unit, for detecting the instruction of adjusting backlight luminance;
First acquiring unit, for obtaining corresponding regulable control mark from described regulating command;
Transmitting element, is respectively sent to each display device controller by described regulable control mark; Each display device controller described, according to the mapping relations preset, obtains the target brightness value of correspondence respectively, sends driving instruction to corresponding LED drive circuit, to drive described LED to send the light of corresponding brightness.
6. car load backlight illumination as claimed in claim 5 regulates device, it is characterised in that also include: filter unit, for the target brightness value in described driving instruction is carried out gradual change Filtering Processing.
7. a car load backlight illumination regulates system, it is characterised in that including:
Brightness regulator;
Controller, is suitable to receive the backlight illumination adjustment signal that described brightness regulator produces, described backlight illumination is regulated signal and processes, generate the instruction of adjusting backlight luminance, and send the instruction of described adjusting backlight luminance to multiple display devices;
Multiple display devices, be suitable to receive the instruction of the described adjusting backlight luminance that described controller sends, regulable control mark is obtained from the instruction of described adjusting backlight luminance, according to default mapping relations, obtain the target brightness value of correspondence respectively, and send driving instruction to corresponding LED drive circuit, drive described LED to send the light of corresponding brightness.
8. car load backlight illumination as claimed in claim 7 regulates system, it is characterised in that described controller includes:
A/D sample circuit, the backlight illumination being suitable to that described brightness regulator is produced regulates signal and samples, and obtains the digital signal of correspondence;
Signal processor, is suitable to described digital signal is processed, and generates the instruction of adjusting backlight luminance;
CAN transceiver, is suitable to be respectively sent to the instruction of adjusting backlight luminance the controller of each display device.
9. car load backlight illumination as claimed in claim 8 regulates system, it is characterised in that the plurality of display device, including:
CAN transceiver, is suitable to receive the instruction of described adjusting backlight luminance;
Memorizer, is suitable to the mapping relations storing regulable control mark corresponding to each display device with target brightness value;
Processor, is suitable to obtain regulable control mark from the instruction of described adjusting backlight luminance, according to the mapping relations of storage in described memorizer, obtains corresponding target brightness value;
LED drive circuit, is suitable to receive corresponding target brightness value, drives described LED to send the light of corresponding brightness.
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| CN107891815A (en) * | 2017-02-13 | 2018-04-10 | 问众智能信息科技（北京）有限公司 | The method and apparatus of intelligent back vision mirror LED brightness Multistage Control |
| CN106804087A (en) * | 2017-02-28 | 2017-06-06 | 惠州华阳通用电子有限公司 | A kind of automatic light modulating method of inter-vehicle information system |
| CN106804087B (en) * | 2017-02-28 | 2019-08-13 | 惠州华阳通用电子有限公司 | A kind of automatic light modulating method of inter-vehicle information system |
| CN111258063A (en) * | 2018-12-03 | 2020-06-09 | 厦门雅迅网络股份有限公司 | HUD environment light signal and PWM duty ratio conversion method, terminal device and storage medium |
| CN111312178A (en) * | 2018-12-11 | 2020-06-19 | 上海欧菲智能车联科技有限公司 | Backlight adjusting method and related equipment |
| CN109640478A (en) * | 2018-12-18 | 2019-04-16 | 深圳Tcl新技术有限公司 | Standby lamp brightness adjusting method, terminal device and storage medium |
| CN110379374A (en) * | 2019-06-18 | 2019-10-25 | 惠州市德赛西威汽车电子股份有限公司 | A kind of gradual device and method of vehicle-carrying display screen brightness |
| CN110969830A (en) * | 2019-11-29 | 2020-04-07 | 安徽江淮汽车集团股份有限公司 | Method and device for adjusting backlight of whole automobile and storage medium |
| CN113002449A (en) * | 2019-12-20 | 2021-06-22 | 北京车和家信息技术有限公司 | Control method and device for vehicle-mounted HMI equipment |
| WO2022116663A1 (en) * | 2020-12-04 | 2022-06-09 | 北京罗克维尔斯科技有限公司 | Method and device for adjusting backlight brightness of display |
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