CN102248922A - Automobile backlight control system and control method thereof - Google Patents
Automobile backlight control system and control method thereof Download PDFInfo
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Abstract
The invention provides an automobile backlight control system and a control method thereof. Backlight is adjusted in an intelligent manner, thereby meeting the demand of people on automobile comfortableness. The automobile backlight control system comprises an automobile body controller, a backlight regulator, a position lamp switch, an electrical apparatus and a backlight lamp, wherein the backlight regulator and the position lamp switch are connected to the automobile body controller; a display screen is arranged on the electrical apparatus; the backlight lamp is arranged in the switch; the backlight regulator is connected to the switch through a backlight output line and is used for controlling the backlight lamp in the switch to work; the automobile backlight control system further comprises a luminance sensor and a control unit connected to the luminance sensor; the control unit, the automobile body controller and the electrical apparatus with the display screen are all connected to an automobile CAN (Controller Area Network) bus; and a knob which is used for regulating the operating mode and the backlight luminance is arranged on the backlight regulator. In the automobile backlight control system, an automatic regulating mode is added under the condition of utilizing the communication sharing advantage of the whole automobile CAN on the basis of traditional manual backlight regulation, thereby automatically synchronously regulating the backlight along with the change of outside lights and increasing the comfortableness.
Description
Technical field
The invention belongs to technical field of automotive electronics, specially refer to a kind of automobile backlight control system and control method thereof.
Background technology
Development along with technology, electronic machine on the automobile increases day by day, there is increasing informational needs to be shown to chaufeur, these display equipments comprise various master cocies, instrument, air-conditioning, acoustic navigation equipment etc., so how the demonstration backlight of good these equipment of co-operative control just becomes an important problem.
Display equipment on the automobile can show various important information of vehicles to chaufeur, make chaufeur can understand the service condition of each parts of automobile and the state of vehicle-mounted comfortable entertainment systems at a glance, these equipment are closely bound up with vehicular drive safety again simultaneously.In addition, also have numerous various master cocies on the automobile, as window lifting switch, back mirror by-pass cock, various lamp switch ... Deng, being these switches of handled easily, these switch inside also must the assembling backlight.Existing automobile backlight control system generally all utilizes the backlight that all use current consumer backlight wire harness to be connected with a regulating control backlight, utilize regulating control backlight to drive, and come car load brightness degree backlight is regulated by regulating regulating control backlight.Unlatching backlight or close then and control by the switch of car load position lamp: when the position lamp is opened (the expression chaufeur thinks that ambient light is dark excessively), the backlight of all current consumers opened simultaneously; When the position light switch closes (the expression chaufeur thinks that ambient light is enough bright), the backlight of all current consumers closed simultaneously.Above-mentioned traditional backlight control system wire harness complexity, backlight can not the variation with extraneous light power carry out the syn adjusting, and adjusting backlight can only be carried out according to predetermined step-length, can obviously feel the saltus step of brightness in the control process, sometimes even feel that brightness backlight crosses bright or dark excessively situation, be difficult to coupling with ambient brightness, therefore can't satisfy the demand of people traveling comfort.
Summary of the invention
The objective of the invention is to propose a kind of automobile backlight control system and control method thereof, backlight with the intelligent manner adjusting, satisfy the requirement of people to car comfort.
Automobile backlight control system of the present invention comprises car body controller, with car body controller bonded assembly regulating control backlight and position light switch, be provided with the current consumer of read-out and be arranged at backlight in the switch, described regulating control backlight and described switch are by link to each other backlight work in the master cock also of output line backlight; Key be also to comprise a luminance sensor and with described luminance sensor bonded assembly control unit, described control unit, car body controller, the current consumer that is provided with read-out all link to each other with the CAN bus of automobile, and described regulating control backlight is provided with the knob of regulating mode of operation and backlight illumination.
Described control unit links to each other by output line backlight with regulating control backlight, directly obtains the pwm signal of expression backlight illumination from regulating control backlight to make things convenient for control unit.
Described control unit is the combination instrument unit of automobile, to make full use of existing components and parts, cost-cutting.
The control method of automobile backlight control system of the present invention has following two kinds:
1, the control method of first kind of automobile backlight control system comprises the steps:
A: when closed and regulating control backlight is in manual mode when the position light switch, luminance sensor is not worked, regulating control backlight is regulated the brightness that is arranged at the backlight in the switch according to the backlight illumination grade of manually setting, and the backlight illumination level signal of setting is sent to the current consumer that is provided with read-out by car body controller, CAN bus, current consumer is regulated the backlight illumination of read-out according to the backlight illumination level signal that receives;
B: when closed and regulating control backlight is in automatic mode when the position light switch, luminance sensor is sent to control unit with current environment brightness, brightness is provided with current backlight illumination grade to control unit according to current environment, then the backlight illumination level signal is sent to entire car controller by the CAN bus and is provided with the current consumer of read-out, current consumer is regulated the backlight illumination of read-out according to the backlight illumination grade that receives; Entire car controller is sent to regulating control backlight with the backlight illumination level signal, and regulating control backlight is regulated the brightness that is arranged at the backlight in the switch according to the backlight illumination level signal that receives;
C: when the position light switch disconnected, regulating control backlight and luminance sensor quit work, and the backlight of current consumer and switch extinguished.
In the described B step, control unit receives the ambient brightness that luminance sensor detects, and the ambient brightness that receives subtracted each other with default standard environment brightness obtain the ambient brightness difference, according to ambient brightness difference and default standard backlight illumination the current backlight brightness degree is set then, described ambient brightness difference is big more, and the current backlight brightness degree is also just big more.
2, the control method of second kind of automobile backlight control system comprises the steps:
A: when closed and regulating control backlight is in manual mode when the position light switch, luminance sensor is not worked, regulating control backlight is sent to output line backlight according to the backlight illumination grade of manually setting with pwm signal, switch utilizes the pwm signal of output line transmission backlight to control the brightness of backlight, after control unit receives the pwm signal of output line transmission backlight, pwm signal is changed into the backlight illumination level signal and is sent to the current consumer that is provided with read-out by the CAN bus, and current consumer is regulated the backlight illumination of read-out according to the backlight illumination level signal that receives;
B: when closed and regulating control backlight is in automatic mode when the position light switch, luminance sensor is sent to control unit with current environment brightness, brightness is provided with current backlight illumination grade to control unit according to current environment, then the backlight illumination level signal is sent to entire car controller by the CAN bus and is provided with the current consumer of read-out, current consumer is regulated the backlight illumination of read-out according to the backlight illumination grade that receives; Entire car controller is sent to regulating control backlight with the backlight illumination level signal, and regulating control backlight is regulated the brightness that is arranged at the backlight in the switch according to the backlight illumination level signal that receives;
C: when the position light switch disconnected, regulating control backlight and luminance sensor quit work, and the backlight of current consumer and switch extinguished.
In the described B step, control unit receives the ambient brightness that luminance sensor detects, and the ambient brightness that receives subtracted each other with default standard environment brightness obtain the ambient brightness difference, according to ambient brightness difference and default standard backlight illumination the current backlight brightness degree is set then, described ambient brightness difference is big more, and the current backlight brightness degree is also just big more.
Automobile backlight control system of the present invention is at the various deficiencies of orthodox car backlight control, on the basis of conventional manual adjusting backlight, advantage is shared in the communication that makes full use of car load CAN, increased the automatically regulating mode, make backlight can the variation and the syn adjusting, increased traveling comfort with extraneous light power.
Description of drawings
Fig. 1 is the schematic diagram of the automobile backlight control system of embodiment 1.
Fig. 2 is the control flow chart of manual mode of the automobile backlight control system of embodiment 1.
Fig. 3 is the control flow chart of automatic mode of the automobile backlight control system of embodiment 1,2.
Fig. 4 is the schematic diagram of the automobile backlight control system of embodiment 2.
Fig. 5 is the control flow chart of manual mode of the automobile backlight control system of embodiment 2.
The specific embodiment
Describe the present invention in detail below in conjunction with specific embodiments and the drawings.
Embodiment 1:
As shown in Figure 1, the automobile backlight control system of present embodiment comprises car body controller, with current consumer such as car body controller bonded assembly regulating control backlight and position light switch, the air-conditioning that is provided with read-out, sound equipment, combination instrument and be arranged at backlight in each switch, regulating control backlight links to each other by output line backlight with each switch and controls backlight work in each switch; Key be also to comprise a luminance sensor and with described luminance sensor bonded assembly control unit (in the present embodiment, control unit is combination instrument), described combination instrument, car body controller, each current consumer that is provided with read-out all link to each other with the CAN bus of automobile, and described regulating control backlight is provided with the knob of regulating mode of operation and backlight illumination.
Above-mentioned regulating control backlight is output as voltage signal, and when this voltage signal was zero, expression was in automatic mode, when this voltage signal greater than zero the time, expression is in manual mode, and magnitude of voltage is represented the backlight illumination grade manually set.
Above-mentioned regulating control backlight is integrated in the car body controller.
The control method of the automobile backlight control system of present embodiment comprises the steps:
A: manual mode: as shown in Figure 2, after the light switch closure of position, car body controller is controlled regulating control backlight and is started working, and detect the magnitude of voltage of regulating control backlight output, to voltage signal of car body controller output, if the magnitude of voltage of this voltage signal greater than zero, represents to be in this moment manual mode, car body controller does not work luminance sensor by control unit (being combination instrument) the output control signal of CAN network to luminance sensor; Regulating control backlight is regulated the brightness that is arranged at the backlight in the switch according to the backlight illumination grade of manually setting, and be that voltage signal is sent to each current consumer that is provided with read-out by car body controller, CAN bus with the backlight illumination level signal of setting, each current consumer is regulated the backlight illumination of read-out according to the backlight illumination level signal that receives;
B: automatic mode: as shown in Figure 3, when and voltage signal that backlight regulating control to car body controller export closed when the position light switch equals zero, expression is in automatic mode at this moment, luminance sensor is sent to control unit (being combination instrument) with current environment brightness, brightness is provided with current backlight illumination grade to control unit according to current environment, then the backlight illumination level signal is sent to entire car controller by the CAN bus and is provided with each current consumer of read-out, each current consumer is regulated the backlight illumination of read-out according to the backlight illumination grade that receives; Entire car controller is sent to regulating control backlight with the backlight illumination level signal, and the backlight illumination level signal that regulating control basis backlight receives changes the magnitude of voltage of the voltage signal of output, is arranged at the brightness of the backlight in each switch with adjusting;
C: when the position light switch disconnected, car body controller was controlled regulating control backlight and luminance sensor quits work, and the backlight of each current consumer and switch extinguished.
In the described B step, control unit (being combination instrument) receives the ambient brightness that luminance sensor detects, and the ambient brightness that receives subtracted each other with default standard environment brightness obtain the ambient brightness difference, according to ambient brightness difference and default standard backlight illumination the current backlight brightness degree is set then, described ambient brightness difference is big more, and the current backlight brightness degree is also just big more.
Embodiment 2:
As shown in Figure 4, as different from Example 1, in the present embodiment, regulating control backlight is integrated in car body controller inside, it is an input switch that adopts variable rheostat to constitute, the signal of its output is a pulse width modulating signal, is called for short pulse width signal or pwm signal, the resistance of corresponding manual knob input, when being in manual mode, its output duty cycle is 6%～91% pulse width signal, when being in automatic mode, it according to the rules output duty cycle be 0% or 100% pulse width signal.
Control unit links to each other by output line backlight with regulating control backlight, directly obtains the pwm signal of expression backlight illumination from regulating control backlight to make things convenient for control unit.
The control method of the automobile backlight control system of present embodiment comprises the steps:
A: manual mode: as shown in Figure 5, after the light switch closure of position, car body controller is controlled regulating control backlight and is started working, control unit (being combination instrument) detects the dutycycle of the pwm signal of regulating control output backlight, if the dutycycle of this pwm signal is between 6%～91%, expression is in manual mode this moment, and control unit control luminance sensor is not worked it; Switch and combination instruments all on the car load all obtain this pwm signal from output line backlight, wherein each switch directly drives backlight with the pwm signal that receives, after combination instrument receives pwm signal, its MCU can handle this signal and calculate the cooresponding backlight illumination grade of pwm signal of this moment, and the backlight illumination level signal that calculates is sent to each current consumer that is provided with read-out by the CAN bus, each current consumer is regulated the backlight illumination of read-out according to the backlight illumination level signal that receives.
In the present embodiment, be the backlight illumination grade classification of instrument screen 16 grades, solve traditional backlight control middle grade and divided the very few phenomenon that causes brightness jump to change, concrete corresponding relation is as shown in the table:
B: automatic mode: as shown in Figure 3, after the light switch closure of position, the regulating control backlight dutycycle of output optical line output that supports or opposes is 0% pulse width signal, and time length is 2 seconds, and expression is in automatic mode this moment.Combination instrument receives this signal and enters automatic mode backlight, after this no longer receives the pwm signal on the adjusting line backlight; Combination instrument control luminance sensor is started working.Luminance sensor is sent to control unit (being combination instrument) with current environment brightness, brightness is provided with current backlight illumination grade to control unit according to current environment, then the backlight illumination level signal is sent to entire car controller by the CAN bus and is provided with each current consumer of read-out, each current consumer is regulated the backlight illumination of read-out according to the backlight illumination grade that receives; Entire car controller is sent to regulating control backlight with the backlight illumination level signal, and the backlight illumination level signal that regulating control basis backlight receives changes the dutycycle of the pwm signal of output, is arranged at the brightness of the backlight in each switch with adjusting;
When chaufeur need withdraw from automatic mode backlight, need return dynamic model formula in one's hands to by-pass cock backlight again.This moment regulating control backlight can to export a dutycycle be 100% pulse width signal, time length is 2 seconds, combination instrument receives this signal and enters manual mode backlight, closes luminance sensor simultaneously.
C: when the position light switch disconnected, car body controller was controlled regulating control backlight and luminance sensor quits work, and the backlight of each current consumer and switch extinguished.
In the described B step, control unit (being combination instrument) receives the ambient brightness that luminance sensor detects, and the ambient brightness that receives subtracted each other with default standard environment brightness obtain the ambient brightness difference, according to ambient brightness difference and default standard backlight illumination the current backlight brightness degree is set then, described ambient brightness difference is big more, and the current backlight brightness degree is also just big more.
Claims (7)
1. automobile backlight control system, comprise car body controller, with car body controller bonded assembly regulating control backlight and position light switch, be provided with the current consumer of read-out and be arranged at backlight in the switch, described regulating control backlight and described switch are by link to each other backlight work in the master cock also of output line backlight; It is characterized in that also comprising a luminance sensor and with described luminance sensor bonded assembly control unit, described control unit, car body controller, the current consumer that is provided with read-out all link to each other with the CAN bus of automobile, and described regulating control backlight is provided with the knob of regulating mode of operation and backlight illumination.
2. automobile backlight control system according to claim 1 is characterized in that described control unit links to each other by output line backlight with regulating control backlight.
3. automobile backlight control system according to claim 1 and 2 is characterized in that described control unit is the combination instrument unit of automobile.
4. the control method of automobile backlight control system according to claim 1 is characterized in that comprising the steps:
A: when closed and regulating control backlight is in manual mode when the position light switch, luminance sensor is not worked, regulating control backlight is regulated the brightness that is arranged at the backlight in the switch according to the backlight illumination grade of manually setting, and the backlight illumination level signal of setting is sent to the current consumer that is provided with read-out by car body controller, CAN bus, current consumer is regulated the backlight illumination of read-out according to the backlight illumination level signal that receives;
B: when closed and regulating control backlight is in automatic mode when the position light switch, luminance sensor is sent to control unit with current environment brightness, brightness is provided with current backlight illumination grade to control unit according to current environment, then the backlight illumination level signal is sent to entire car controller by the CAN bus and is provided with the current consumer of read-out, current consumer is regulated the backlight illumination of read-out according to the backlight illumination grade that receives; Entire car controller is sent to regulating control backlight with the backlight illumination level signal, and regulating control backlight is regulated the brightness that is arranged at the backlight in the switch according to the backlight illumination level signal that receives;
C: when the position light switch disconnected, regulating control backlight and luminance sensor quit work, and the backlight of current consumer and switch extinguished.
5. the control method of automobile backlight control system according to claim 4, it is characterized in that in the described B step, control unit receives the ambient brightness that luminance sensor detects, and the ambient brightness that receives subtracted each other with default standard environment brightness obtain the ambient brightness difference, according to ambient brightness difference and default standard backlight illumination the current backlight brightness degree is set then, described ambient brightness difference is big more, and the current backlight brightness degree is also just big more.
6. the control method of automobile backlight control system according to claim 2 is characterized in that comprising the steps:
A: when closed and regulating control backlight is in manual mode when the position light switch, luminance sensor is not worked, regulating control backlight is sent to output line backlight according to the backlight illumination grade of manually setting with pwm signal, switch utilizes the pwm signal of output line transmission backlight to control the brightness of backlight, after control unit receives the pwm signal of output line transmission backlight, pwm signal is changed into the backlight illumination level signal and is sent to the current consumer that is provided with read-out by the CAN bus, and current consumer is regulated the backlight illumination of read-out according to the backlight illumination level signal that receives;
B: when closed and regulating control backlight is in automatic mode when the position light switch, luminance sensor is sent to control unit with current environment brightness, brightness is provided with current backlight illumination grade to control unit according to current environment, then the backlight illumination level signal is sent to entire car controller by the CAN bus and is provided with the current consumer of read-out, current consumer is regulated the backlight illumination of read-out according to the backlight illumination grade that receives; Entire car controller is sent to regulating control backlight with the backlight illumination level signal, and regulating control backlight is regulated the brightness that is arranged at the backlight in the switch according to the backlight illumination level signal that receives;
C: when the position light switch disconnected, regulating control backlight and luminance sensor quit work, and the backlight of current consumer and switch extinguished.
7. the control method of automobile backlight control system according to claim 6, it is characterized in that in the described B step, control unit receives the ambient brightness that luminance sensor detects, and the ambient brightness that receives subtracted each other with default standard environment brightness obtain the ambient brightness difference, according to ambient brightness difference and default standard backlight illumination the current backlight brightness degree is set then, described ambient brightness difference is big more, and the current backlight brightness degree is also just big more.
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| CN103010093A (en) * | 2012-12-10 | 2013-04-03 | 奇瑞汽车股份有限公司 | Backlight processing method of automobile combination instrument |
| CN103474043A (en) * | 2013-09-24 | 2013-12-25 | 沈阳美行科技有限公司 | Method adjusting color of navigation map according to luminance of screen |
| CN105128732A (en) * | 2015-08-28 | 2015-12-09 | 安徽江淮汽车股份有限公司 | Backlight adjusting system and method for automobile |
| CN105235585A (en) * | 2015-10-08 | 2016-01-13 | 奇瑞汽车股份有限公司 | Light control method for luminous part in vehicle |
| CN107025894A (en) * | 2016-02-02 | 2017-08-08 | 上海嘉车信息科技有限公司 | Vehicular screen brightness and content show adaptive control system and control method |
| CN108638959A (en) * | 2018-05-11 | 2018-10-12 | 浙江吉利控股集团有限公司 | Method for controlling backlight thereof, backlight control system and vehicle |
| CN109094487A (en) * | 2018-09-28 | 2018-12-28 | 东南（福建）汽车工业有限公司 | A kind of the brightness of backlight regulating system and method for switch for vehicle |
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| CN103474043A (en) * | 2013-09-24 | 2013-12-25 | 沈阳美行科技有限公司 | Method adjusting color of navigation map according to luminance of screen |
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| CN105235585A (en) * | 2015-10-08 | 2016-01-13 | 奇瑞汽车股份有限公司 | Light control method for luminous part in vehicle |
| CN107025894A (en) * | 2016-02-02 | 2017-08-08 | 上海嘉车信息科技有限公司 | Vehicular screen brightness and content show adaptive control system and control method |
| CN109765494A (en) * | 2017-11-05 | 2019-05-17 | 王正权 | A kind of electric automobile power battery rapid detection method and detection system |
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| CN108638959B (en) * | 2018-05-11 | 2024-03-26 | 浙江吉利控股集团有限公司 | Backlight control method, backlight control system and vehicle |
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Application publication date: 20111123 |