CN113391661A - Temperature control method and device for vehicle-mounted display - Google Patents
Temperature control method and device for vehicle-mounted display Download PDFInfo
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- CN113391661A CN113391661A CN202110736874.3A CN202110736874A CN113391661A CN 113391661 A CN113391661 A CN 113391661A CN 202110736874 A CN202110736874 A CN 202110736874A CN 113391661 A CN113391661 A CN 113391661A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
Abstract
The invention discloses a temperature control method of a vehicle-mounted display, which comprises the following steps: s1: after power-on, the temperature correction coefficient is assigned with 1, and the screen-off flag bit flag is assigned with 0; s2: when the temperature number T of the display is less than or equal to Tmin, the temperature correction coefficient is 1, 100% of pictures of the display are displayed, the display is displayed in 100% of pictures when the display is positioned between Tmin and Tmid and the screen closing flag bit is 0, the temperature correction coefficient is periodically reduced to 0.2 and is reduced to A% at the lowest, and when T is more than Tmax, the display is closed; s3: when the display temperature value is between Tmin and Tmax and the screen closing flag bit flag =1, the display screen is continuously closed, the display screen is positioned between Tmin and the screen closing flag bit flag =1, the temperature correction coefficient is A%, when the display screen temperature value is between Tmin and the screen closing flag bit flag =0 or T is less than or equal to Tmin, the temperature correction coefficient is gradually restored to 1, and the display screen driving module is adjusted by the controller according to the temperature to reduce the display screen display area, so that the display temperature is reduced.
Description
Technical Field
The invention relates to the technical field of vehicle-mounted display screens, in particular to a method and a device for controlling the temperature of a vehicle-mounted display.
Background
The automobile comprises different types of vehicle-mounted displays such as an electronic rearview mirror, a central control display screen and the like, and the driving and passengers can watch the state of the automobile, video entertainment and real-time video conditions outside the automobile through the different vehicle-mounted display screens. Because the vehicle runs under the high-temperature working condition, the temperature of the vehicle-mounted display is overhigh, and the system needs to be provided with a temperature control mechanism to prevent the damage of the display system caused by overhigh temperature. The current control strategy is mainly that the controller adjusts the brightness of the display according to the temperature of the display, so as to achieve the purpose of reducing the temperature of the display. The method for reducing the brightness of the display can make the picture of the display screen dark, so that a driver cannot see the actually displayed content of the picture clearly, and particularly when the driver needs to observe the actual environment outside the vehicle through the display, the method is very unfavorable for the safe driving of the driver.
Disclosure of Invention
The invention aims to solve the problems that in the prior art, the brightness of a display is reduced under the condition of high temperature, so that a driver cannot clearly see pictures actually displayed by the display through a display screen, cannot clearly see actual conditions outside a vehicle through the display, and is not beneficial to safe driving of the driver. The present invention provides an invention or technique for controlling the temperature of a display by controlling the size of the display area of the display, i.e. maintaining the original video frame scale, reducing the field of view, such as an electronic rearview mirror display, or maintaining the field of view, reducing the video frame scale, without changing the brightness of the display, the method comprising the steps of:
s1: after the display is powered on, the temperature correction coefficient can be assigned with an initial value of 1, the screen-off flag bit flag can also be assigned with an initial value of 0, and the size of a display picture of the display is the maximum display size of the display multiplied by the temperature correction coefficient;
s2: when the temperature value T of the display is less than or equal to Tmin, the temperature correction coefficient is 1, 100% of pictures of the display are displayed, when the temperature value T of the display is between Tmin and Tmid and the screen closing flag bit is 0, the temperature correction coefficient is 1, 100% of pictures of the display are displayed, when the temperature value T of the display is between Tmid and Tmax and the screen closing flag bit is 0, the controller periodically and gradually reduces the temperature correction coefficient to 0.2 and to A at the lowest according to the real-time temperature of the display, and when the temperature value T of the display is greater than Tmax, the controller directly closes the display and sets the screen closing flag bit to = 1;
s3: when the display temperature value is between Tmin and the screen-off flag bit flag =1, the controller continues to turn off the display screen, when the display temperature value is between Tmin and the screen-off flag bit flag =1, the screen-off flag bit is assigned to be 0, the temperature correction coefficient is A%, when the display temperature value is between Tmin and the screen-off flag bit flag =0, the controller periodically and gradually restores the temperature correction coefficient until the temperature correction coefficient is restored to 1 according to the real-time temperature of the display, and when the display temperature value T is less than or equal to Tmin, the controller periodically and gradually restores the display area of the display screen until the temperature correction coefficient is restored to 1.
As an improvement of the invention, the vehicle-mounted display temperature control device based on the vehicle-mounted display temperature control method comprises a controller, a display screen, a driving module and a temperature detection module.
Different mapping relations between the temperature of the display screen and the size of the picture display area of the display screen can be designed according to different vehicle-mounted displays. After the controller acquires the temperature data of the display screen, the size of the display screen image at the temperature can be acquired according to the temperature of the display screen and the mapping relation, and then the size of the display screen image area is adjusted to the size through the display screen driving module, so that the balance between the temperature of the display screen and the size of the display screen image area of the display screen is achieved.
As an improvement of the present invention, the temperature detection module is configured to monitor a temperature of the display, the controller is respectively connected to the display screen, the driving module, and the temperature detection module, the driving module is further connected to the display screen, the temperature detection module feeds the temperature of the display back to the controller, and the controller adjusts a size of a display area of the display according to the temperature data and the driving module, so as to achieve a balance between the temperature of the display and the size of the display area, that is, by reducing an area of the display, the display is cooled.
As an improvement of the invention, the adjustment measures are that when the temperature value T of the display is more than or equal to Tmax, the controller directly closes the display screen to protect the whole system, when the temperature of the display is between Tmin and Tmax, the controller can periodically and gradually reduce the display area of the display screen picture to the designed minimum display size according to the preset adjustment period and the corresponding mapping relation, when the temperature value T of the display screen module is less than or equal to Tmin, the display screen picture area is 100%, when the temperature T of the display is more than or equal to Tmax, the system gives an alarm according to the mode of displaying the temperature alarm sign or giving an alarm, when the temperature T of the display is less than or equal to Tmin, the alarm is stopped, and the temperature detection module detects the current temperature value every B seconds.
The invention has the beneficial effects that: according to the invention, the vehicle-mounted display temperature is monitored, and the controller adjusts the display screen driving module according to the temperature to reduce the display screen display area, so that the temperature of the display is reduced, and the balance between the size of the display screen display area and the temperature is achieved, thus the requirements of customers on brightness and temperature rise can be met, meanwhile, the driver can be ensured to see the display content of the display and the actual conditions outside the vehicle clearly under the condition that the temperature of the display is overhigh, and the driving safety of the driver is ensured.
Drawings
Fig. 1 is a view comparing a conventional mirror type interior rear view mirror and a 100% frame display streaming media interior rear view mirror.
Fig. 2 is a view comparing a conventional mirror type interior rear view mirror and a 50% frame display streaming media interior rear view mirror.
FIG. 3 is a flow chart of the control method of the present invention.
FIG. 4 is a schematic diagram of 100% screen display of the display panel of the present invention.
FIG. 5 is a schematic diagram of a display screen displaying 50% of images according to the present invention.
FIG. 6 is a block diagram of a control device according to the present invention.
Detailed Description
The present invention will be further illustrated with reference to the accompanying figures 1-6 and the following detailed description, which should be understood to illustrate the invention only and not to limit the scope of the invention.
s1: after the display is powered on, the temperature correction coefficient can be assigned with an initial value of 1, the screen-off flag bit flag can also be assigned with an initial value of 0, and the size of a display picture of the display is the maximum display size of the display multiplied by the temperature correction coefficient;
s2, detecting the current temperature value every 6 seconds by the system;
s3: when the temperature value T of the display is less than or equal to 85 ℃, the temperature correction coefficient is 1, 100% of pictures of the display are displayed as shown in figure 4, the adjustment is carried out once every 6 seconds, when the temperature value of the display is between 85 ℃ and 95 ℃ (85 ℃ is less than or equal to 95 ℃) and the screen closing flag bit is 0, the temperature correction coefficient is 1, 100% of pictures of the display are displayed, when the temperature value of the display is between 95 ℃ and 105 ℃ (95 ℃ is less than or equal to 105 ℃) and the screen closing flag bit is 0, the controller reduces the temperature correction coefficient to 0.2 step by step and 50% at the lowest according to the real-time temperature of the display, as shown in figure 5, so that the pictures of the display module can be clearly displayed, when the temperature value T of the display is more than 105 ℃, the controller directly closes the display, and sets the screen closing flag bit =1, the damage or other accidents of the display caused by high temperature are prevented, and the process of temperature rising from left to right, adjusting every 30 seconds;
s3: when the temperature value of the display is between 95 ℃ and 105 ℃ (the temperature is more than 95 ℃ and less than or equal to 105 ℃) and the screen-off flag bit flag =1, the controller continues to close the display screen to prevent the display from being damaged or other accidents caused by high temperature, when the temperature value is between 85 ℃ and 95 ℃ (the temperature is more than 85 ℃ and less than or equal to 95 ℃), and the screen-off flag bit flag =1, the assigned screen-off flag bit is 0, the temperature correction coefficient is 50%, when the temperature value of the display is between 85 ℃ and 95 ℃ (85 ℃ < temperature is less than or equal to 95 ℃) and the screen-off flag bit flag is =0, the controller periodically and gradually restores the temperature correction coefficient according to the real-time temperature of the display until the temperature is restored to 1, when the temperature value T of the display is less than or equal to 85 ℃, the controller periodically and gradually restores the display area of the display picture until the temperature correction coefficient is restored to 1, and the process is a process of descending the temperature from right to left.
The temperature value is 85 ℃, 95 ℃, 105 ℃ and T, wherein the temperature value is 85 ℃, 95 ℃, 105 ℃ and 50%, and the specific numerical values of the temperature detection period and the adjustment period of the display screen area can be flexibly set according to different environments and temperatures in the vehicle.
The invention aims to solve the problems that in the prior art, the brightness of the display is reduced under the high-temperature condition, so that a driver cannot clearly see the picture actually displayed by the display through the display screen, cannot clearly see the actual condition outside the automobile through the display and is not beneficial to safe driving of the driver. The present invention provides an invention or technique for controlling the temperature of a display by controlling the size of the display area of the display, i.e., maintaining the original video frame scale, reducing the field of view, such as an electronic rearview mirror display, or maintaining the field of view, reducing the video frame scale, without changing the brightness of the display.
Example 2: a vehicle-mounted display temperature control device based on a vehicle-mounted display temperature control method comprises a controller, a display screen, a driving module and a temperature detection module, and is shown in figure 6.
Different mapping relations between the temperature of the display screen and the size of the picture display area of the display screen can be designed according to different vehicle-mounted displays. After the controller acquires the temperature data of the display screen, the size of the display screen image at the temperature can be acquired according to the temperature of the display screen and the mapping relation, the design of the specific mapping relation belongs to the prior art, and is not repeated herein, and then the size of the display screen image area is adjusted to reach the balance between the temperature of the display screen and the size of the display screen image area of the display screen through the display screen driving module.
The temperature detection module is used for monitoring the temperature of the display, the controller is respectively connected with the display screen, the driving module and the temperature detection module, the driving module is further connected with the display screen, the temperature detection module feeds the temperature of the display back to the controller, the controller adjusts the size of the display screen display region range according to temperature data and through the driving module, the balance between the temperature of the display and the size of the display screen region is achieved, namely, the area of the display screen region of the display is reduced, and therefore the purpose of cooling the display is achieved.
The adjustment measure is that the temperature detection module detects the current temperature of the system once every 6 seconds and transmits the temperature to the controller. The controller controls the display screen driving module according to the current system temperature to maintain the size of the picture display area and the system temperature balance. When the temperature value T of the display is larger than or equal to 105 ℃, the controller directly closes the display screen to protect the whole system, and when the temperature of the display is between 85 ℃ and 105 ℃, the controller can periodically and gradually reduce the display area of the display screen picture to the designed minimum display size according to the preset regulation period and the corresponding mapping relation until the temperature value T of the display screen module is smaller than or equal to 85 ℃;
when the temperature value T of the display screen module is less than or equal to 85 ℃, the picture area of the display screen is periodically and gradually restored until the temperature value T is restored to 100 percent; when the temperature T of the display is more than or equal to 105 ℃, the system gives an alarm according to the way of the display of the temperature alarm or the sound of the alarm, and when the temperature T of the display is less than or equal to 85 ℃, the alarm is stopped.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various modifications can be made to the embodiments described in the foregoing embodiments, or some or all of the technical features of the embodiments can be equivalently replaced, and the modifications or the replacements do not make the essence of the corresponding technical solutions depart from the scope of the embodiments of the present invention.
Claims (6)
1. A temperature control method for a vehicle-mounted display is characterized by comprising the following steps:
s1: after the display is powered on, the temperature correction coefficient can be assigned with an initial value of 1, the screen-off flag bit flag can also be assigned with an initial value of 0, and the size of a display picture of the display is the maximum display size of the display multiplied by the temperature correction coefficient;
s2: when the temperature value T of the display is less than or equal to Tmin, the temperature correction coefficient is 1, 100% of pictures of the display are displayed, when the temperature value T of the display is between Tmin and Tmid and the screen closing flag bit is 0, the temperature correction coefficient is 1, 100% of pictures of the display are displayed, when the temperature value T of the display is between Tmid and Tmax and the screen closing flag bit is 0, the controller periodically and gradually reduces the temperature correction coefficient to 0.2 and to A at the lowest according to the real-time temperature of the display, and when the temperature value T of the display is greater than Tmax, the controller directly closes the display and sets the screen closing flag bit to = 1;
s3: when the display temperature value is between Tmin and the screen-off flag bit flag =1, the controller continues to turn off the display screen, when the display temperature value is between Tmin and the screen-off flag bit flag =1, the screen-off flag bit is assigned to be 0, the temperature correction coefficient is A%, when the display temperature value is between Tmin and the screen-off flag bit flag =0, the controller periodically and gradually restores the temperature correction coefficient until the temperature correction coefficient is restored to 1 according to the real-time temperature of the display, and when the display temperature value T is less than or equal to Tmin, the controller periodically and gradually restores the display area of the display screen until the temperature correction coefficient is restored to 1.
2. The vehicle-mounted display temperature control device based on the vehicle-mounted display temperature control method is characterized by comprising a controller, a display screen, a driving module and a temperature detection module.
3. The temperature control device for the vehicle-mounted display according to claim 2, wherein the temperature detection module is used for monitoring the temperature of the display, the controller is respectively connected with the display screen, the driving module and the temperature detection module, the driving module is further connected with the display screen, the temperature detection module feeds the temperature of the display back to the controller, and the controller adjusts the size of the display area range of the display screen according to the temperature data and through the driving module, so that the balance between the temperature of the display and the size of the display area is achieved.
4. The temperature control method of the vehicle-mounted display according to claim 3, characterized in that when the temperature T of the display is more than or equal to Tmax, the system gives an alarm according to the display of a temperature alarm sign or the manner of sounding an alarm.
5. The vehicle-mounted display temperature control method according to claim 4, characterized in that when the display temperature T is less than or equal to Tmin, the alarm is stopped.
6. The temperature control method for the vehicle-mounted display according to claim 5, wherein the temperature detection module detects the current temperature value every B seconds.
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| CN106199115A (en) * | 2016-06-28 | 2016-12-07 | 电子科技大学 | A kind of baseline zero inclined automatic correcting method of digital oscilloscope |
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