Backlight plate power control method, control device, electronic rearview mirror and vehicle

Abstract

The invention provides a method for controlling the power of a backlight plate, a control device, an electronic rearview mirror and a vehicle. The method for controlling the power of the backlight plate of the display screen comprises the steps that the current temperature of a display panel of the display screen is acquired; and under the condition that the current temperature is lower than a first threshold temperature, the current power of the backlight plate is adjusted to be first enhanced power, and the first enhanced power is larger than the current power.

Description

Technical Field

[0001] The present disclosure relates to the automotive field, and more specifically, to a method for controlling the power of a backlight panel of a display screen, a control device for controlling the power of a backlight panel of a display screen, a vehicle including the above-mentioned control device for controlling the power of a backlight panel of a display screen, and the above-mentioned control device for controlling the power of a backlight panel of a display screen or the above-mentioned electronic rearview mirror. Background Art

[0002] Recently, with the official release of the national standard GB15084, vehicles that use camera monitor systems instead of traditional rearview mirrors are also allowed to legally drive on the road in China. The camera monitor system is such a small electronic system, which consists of three important parts: camera, monitor and controller. The scene outside the car is collected in real time by the camera, then processed by the controller and finally displayed on the monitor in the cockpit.

[0003] Different from traditional rearview mirrors, electronic exterior rearview mirrors have a wider field of view and can provide good visual imaging effects even in bad weather conditions such as rainy days and nights. Electronic exterior rearview mirrors only need two cameras on the left and right outside the car, so the size of the exterior rearview mirror is smaller, which can bring less wind resistance to the whole vehicle. At the same time, in order to ensure the driver's driving safety, the electronic exterior rearview mirror needs to display the outside image in real time. This also puts forward requirements for the response time of the camera monitor system.

[0004] The in-car monitor of the camera monitor system is generally an LCD screen. Its display principle is that each pixel realizes different red, green, blue (RGB) color combinations by controlling the flipping of the liquid crystal. All pixels display the corresponding colors, and finally form a picture. At normal temperature, the liquid crystal response time of the electronic exterior rearview mirror display screen is about 25ms, and the picture can be displayed smoothly. The response time of the liquid crystal will increase significantly with the decrease of temperature. For example, when the temperature is below -10℃, its response time may be close to 100ms. At this time, the electronic exterior rearview mirror display screen will begin to have problems such as image afterimage, tailing, and lag. The driver's rear view observed through the display screen will deviate from the actual view, which is very dangerous. Therefore, it is particularly important to improve the response time of the electronic exterior rearview mirror display screen at low temperatures.

[0005] The existing technical solution is to add a layer of heated glass or film between the display panel and the backlight panel inside the electronic exterior rearview mirror display screen. Figure 1 FIG. 1 shows a schematic diagram of the structure of a display screen for an electronic exterior rearview mirror in the prior art. Figure 1It can be seen that the display screen for electronic exterior rearview mirror in the prior art includes at least the following four layers: the outermost glass cover plate 110, the display panel 120 for display, the backlight plate 140, and the heating layer 130 disposed between the display panel 120 and the backlight plate 140. The heating layer 130 is heated at a low temperature, so that the overall temperature of the display panel 120 located thereon is increased, thereby improving the response time and thereby improving driving safety.

[0006] However, the solution of setting a heating layer 130 in the prior art solves the problem of low temperature response delay by adding a heating layer such as a heating glass or a membrane between the display panel 120 and the backlight panel 140 of the electronic exterior rearview mirror. The heating glass / diaphragm is provided with a heat source by a heating wire attached to the glass or the membrane. In order to realize the connection between the two pins led out for power supply and the flexible circuit board of the display screen, the heating is controlled by an external controller. This solution can quickly heat up the display screen through a large area of ​​heating wire, thereby reducing the response time.

[0007] Compared with the original technical solution, although the problem of low temperature response can be directly solved by adding a heat source, the original internal structure of the electronic exterior rearview mirror display screen is destroyed. Regardless of whether heated glass or diaphragm is added, the transmittance of this layer of medium is bound to be low due to the presence of the heating wire, and the brightness of the entire electronic exterior rearview mirror display screen will be greatly reduced. In addition, due to the influence of the edge wiring, the thickness of the electronic exterior rearview mirror display screen will increase, and the size of the black border will also increase. This is contrary to the trend of vehicle-mounted narrow-framed display screens. Furthermore, because the ambient light will add a layer of reflection inside the electronic exterior rearview mirror display screen, the reflectivity of the entire display screen will also increase, resulting in a decrease in the human eye's perception of the contrast of the electronic exterior rearview mirror display screen. Finally, because a heating layer is added, the difficulty of the display screen bonding process will also increase, and the defective rate will increase significantly. Summary of the invention

[0008] In order to solve the above problem, that is, the existing solution of using a heating layer to reduce the delay of the display panel increases the manufacturing cost, complicates the display structure and reduces the yield, the inventor of the present disclosure innovatively thought of not adding a physical structure, but instead using the heat dissipation effect of the backlight panel of the display to achieve the harm caused by the increase in delay at low temperatures, thereby improving customer satisfaction and product competitiveness.

[0009] Based on this, the first aspect of the present disclosure proposes a method for controlling the power of a backlight panel of a display screen, the method comprising:

[0010] Acquiring a current temperature of a display panel of the display screen; and

[0011] In a case where the current temperature is lower than a first threshold temperature, the current power of the backlight panel is adjusted to a first enhanced power, wherein the first enhanced power is greater than the current power.

[0012] In this way, the method for controlling the power of the backlight panel of a display screen according to the contents of the present disclosure can, without adding physical structure, increase the current power of the backlight panel to the above-mentioned first enhanced power when the current temperature is lower than the first threshold temperature to achieve heating of the display panel, thereby reducing the delay of the display panel and thereby ensuring driving safety.

[0013] In one embodiment according to the present disclosure, the method further includes:

[0014] When the current temperature is not lower than the first threshold temperature and not higher than the second threshold temperature, the power of the backlight panel is maintained unchanged.

[0015] In this way, a temperature range can be set, and when the temperature is within the range, the power of the backlight panel is maintained unchanged, thereby reducing the difficulty of using the method for controlling the power of the backlight panel of the display screen according to the contents of the present disclosure and thereby improving the stability of the method for controlling the power of the backlight panel of the display screen according to the contents of the present disclosure.

[0016] In one embodiment according to the present disclosure, the method further includes:

[0017] When the current temperature is not lower than the first threshold temperature and not higher than the second threshold temperature, the current power of the backlight panel is adjusted to a second enhanced power.

[0018] In this way, the method for controlling the power of the backlight panel of the display screen according to the present disclosure can dynamically adjust the power of the backlight panel according to the current temperature of the display panel to balance the relationship between heating and power consumption.

[0019] In one embodiment according to the present disclosure, the second enhanced power is not higher than the first enhanced power. In this way, the method for controlling the power of the backlight panel of the display screen according to the present disclosure can dynamically adjust the power of the backlight panel according to the current temperature of the display panel, and specifically, can appropriately reduce the power of the backlight panel when the current temperature of the display panel rises to balance the relationship between heating and power consumption.

[0020] In one embodiment according to the present disclosure, the second enhanced power is associated with the temperature of the display panel. In this way, the method for controlling the power of the backlight panel of the display screen according to the present disclosure can dynamically adjust the power of the backlight panel according to the current temperature of the display panel, and specifically, can appropriately reduce the power of the backlight panel when the current temperature of the display panel rises to balance the relationship between heating and power consumption.

[0021] In one embodiment according to the present disclosure, the method further includes:

[0022] In a case where the current temperature is higher than a second threshold temperature, the driving power of the backlight panel is determined according to the ambient brightness, wherein the second threshold temperature is higher than the first threshold temperature.

[0023] In this way, the method for controlling the power of the backlight panel of a display screen according to the contents of the present disclosure can determine the driving power of the backlight panel according to the ambient brightness when the delay index of the display panel meets the requirements. Specifically, when the current temperature of the display panel rises to a predetermined temperature, the power of the backlight panel can be set according to the ambient brightness to achieve a better display effect.

[0024] In one embodiment of the present disclosure, the correspondence between the ambient brightness and the driving power is included in a brightness power table. In this way, the corresponding parameters can be calibrated when the display panel or the display screen including the display panel leaves the factory, so that the configuration of the driving power can be realized quickly.

[0025] In one embodiment of the present disclosure, determining the driving power of the backlight panel according to the ambient brightness further includes:

[0026] The driving power of the backlight panel is determined according to the ambient brightness by querying the brightness power table.

[0027] In this way, the corresponding parameters of the display panel or the display screen including the display panel can be calibrated when it leaves the factory, so that the configuration of the driving power can be realized quickly.

[0028] In one embodiment of the present disclosure, the current power is determined by querying a brightness power table. In this way, the corresponding parameters can be calibrated when the display panel or the display screen including the display panel leaves the factory, so that the configuration of the driving power can be realized quickly.

[0029] In one embodiment of the present disclosure, the first enhanced power is the maximum rated power of the backlight panel. In this way, the display panel can be heated at the fastest speed, thereby reducing the delay of the display panel at the fastest speed.

[0030] In addition, a second aspect of the present disclosure provides a control device for controlling the power of a backlight panel of a display screen, the control device comprising:

[0031] a temperature sensor configured to obtain a current temperature of a display panel of the display screen; and

[0032] A microcontroller is configured to: when the current temperature is lower than a first threshold temperature, adjust the current power of the backlight panel to a first enhanced power, wherein the first enhanced power is greater than the current power.

[0033] In this way, the control device for controlling the power of the backlight panel of a display screen according to the contents of the present disclosure can, without increasing the physical structure of the display screen, increase the current power of the backlight panel to the above-mentioned first enhanced power when the current temperature is lower than the first threshold temperature to achieve heating of the display panel, thereby reducing the delay of the display panel and thereby ensuring driving safety.

[0034] In one embodiment according to the present disclosure, the microcontroller is further configured to:

[0035] When the current temperature is not lower than the first threshold temperature and not higher than the second threshold temperature, the power of the backlight panel is maintained unchanged.

[0036] In this way, a temperature range can be set, and when the temperature is within the range, the power of the backlight panel is maintained unchanged, thereby reducing the difficulty of using the control device for controlling the power of the backlight panel of the display screen according to the contents of the present disclosure and thereby improving the stability of the control device for controlling the power of the backlight panel of the display screen according to the contents of the present disclosure.

[0037] In one embodiment according to the present disclosure, the microcontroller is further configured to:

[0038] When the current temperature is not lower than the first threshold temperature and not higher than the second threshold temperature, the current power of the backlight panel is adjusted to a second enhanced power.

[0039] In this way, the control device for controlling the power of the backlight panel of the display screen according to the present disclosure can dynamically adjust the power of the backlight panel according to the current temperature of the display panel to balance the relationship between heating and power consumption.

[0040] In one embodiment according to the present disclosure, the microcontroller is further configured to:

[0041] In a case where the current temperature is higher than a second threshold temperature, the driving power of the backlight panel is determined according to the ambient brightness, wherein the second threshold temperature is higher than the first threshold temperature.

[0042] In this way, the control device for controlling the power of the backlight panel of a display screen according to the contents of the present disclosure can determine the driving power of the backlight panel according to the ambient brightness when the delay index of the display panel meets the requirements. Specifically, when the current temperature of the display panel rises to a predetermined temperature, the power of the backlight panel can be set according to the ambient brightness to achieve a better display effect.

[0043] Furthermore, the third aspect of the present disclosure proposes a control device for controlling the power of a backlight panel of a display screen, the control device comprising a memory and a processor, the memory storing executable instructions, and when the executable instructions are executed in the processor, the processor implements the method for controlling the power of a backlight panel of a display screen proposed in the first aspect of the present disclosure.

[0044] In addition, the fourth aspect of the present disclosure proposes an electronic rearview mirror, which includes a camera and a display, wherein the display includes a control device for controlling the power of the backlight panel of the display screen proposed according to the second aspect or the third aspect of the present disclosure.

[0045] In one embodiment according to the present disclosure, the electronic rearview mirror is configured as an electronic exterior rearview mirror or an electronic interior rearview mirror.

[0046] Finally, the fifth aspect of the present disclosure proposes a vehicle, which includes a control device for controlling the power of the backlight panel of the display screen proposed according to the second aspect or the third aspect of the present disclosure, or an electronic rearview mirror proposed according to the fourth aspect of the present disclosure.

[0047] In summary, the method for controlling the power of the backlight panel of a display screen and the control device for controlling the power of the backlight panel of a display screen according to the contents of the present disclosure can, without increasing the physical structure of the display screen, increase the current power of the backlight panel to the above-mentioned first enhanced power when the current temperature is lower than the first threshold temperature to achieve heating of the display panel, thereby reducing the delay of the display panel and thereby ensuring driving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The features, advantages and other aspects of the embodiments of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings, in which several embodiments of the present disclosure are shown in an exemplary and non-limiting manner. In the accompanying drawings:

[0049] Figure 1A schematic structural diagram of a display screen 100 for an electronic exterior rearview mirror in the prior art is shown;

[0050] Figure 2 A schematic structural diagram of a display screen 200 for an electronic exterior rearview mirror according to an embodiment of the present disclosure is shown;

[0051] Figure 3 A flow chart of a method 300 for controlling the power of a backlight of a display screen according to an embodiment of the present disclosure is shown;

[0052] Figure 4 A schematic structural diagram of a control device 400 for controlling the power of a backlight panel of a display screen according to an embodiment of the present disclosure is shown;

[0053] Figure 5 A schematic structural diagram of a control device 500 for controlling the power of a backlight panel of a display screen according to another embodiment of the present disclosure is shown; and

[0054] Figure 6 A schematic structural diagram of a control device 600 for controlling the power of a backlight panel of a display screen according to yet another embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0055] The various exemplary embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. Although the exemplary methods and devices described below include software and / or firmware executed on hardware among other components, it should be noted that these examples are merely illustrative and should not be considered restrictive. For example, it is considered that any or all hardware, software, and firmware components can be implemented exclusively in hardware, exclusively in software, or in any combination of hardware and software. Therefore, although exemplary methods and devices have been described below, it should be readily understood by those skilled in the art that the examples provided are not intended to limit the manner in which these methods and devices are implemented.

[0056] In addition, the flowcharts and block diagrams in the accompanying drawings illustrate the possible architecture, functions and operations of the methods and systems according to the various embodiments of the present disclosure. It should be noted that the functions marked in the boxes may also occur in an order different from that marked in the accompanying drawings. For example, two boxes represented in succession may actually be executed substantially in parallel, or they may sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the flowchart and / or block diagram, and the combination of boxes in the flowchart and / or block diagram, may be implemented using a dedicated hardware-based system that performs a specified function or operation, or may be implemented using a combination of dedicated hardware and computer instructions.

[0057] The terms "including", "comprising" and similar terms used herein are open terms, i.e., "including / including but not limited to", indicating that other contents may also be included. The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment", and the term "another embodiment" means "at least one other embodiment", etc.

[0058] As mentioned above, the solution for reducing the time delay of display screens at low temperatures in the prior art basically requires an additional heating layer, which, on the one hand, reduces the light transmittance of the display screen, causing display problems; on the other hand, it also increases the size of the black border of the display screen and increases the reflectivity of the display screen, which is not desirable for achieving a good display effect.

[0059] In order to solve the above technical problems, the inventors of the present disclosure have achieved the effect of heating by operating the backlight at high power based on the current display structure, thereby reducing the response time. The solution according to the present disclosure can keep the brightness of the electronic exterior rearview mirror display screen from attenuating, the thickness of the display screen and the size of the black border from increasing, the reflectivity of the display screen from increasing, and the defective rate of the display screen from increasing, thereby improving customer satisfaction and product competitiveness.

[0060] Abstractly speaking, the first aspect of the present disclosure proposes a method for controlling the power of a backlight panel of a display screen, the method comprising: obtaining the current temperature of a display panel of the display screen; and when the current temperature is lower than a first threshold temperature, adjusting the current power of the backlight panel to a first enhanced power, wherein the first enhanced power is greater than the current power. In this way, the method for controlling the power of a backlight panel of a display screen according to the present disclosure can increase the current power of the backlight panel to the first enhanced power mentioned above when the current temperature is lower than the first threshold temperature without adding a physical structure to achieve heating of the display panel, thereby reducing the delay of the display panel and thereby ensuring driving safety.

[0061] In addition, the present disclosure also makes an updated design on the side of the control device, that is, the second aspect of the present disclosure also proposes a control device for controlling the power of the backlight panel of the display screen, the control device comprising: a temperature sensor, the temperature sensor is configured to obtain the current temperature of the display panel of the display screen; and a microcontroller, the microcontroller is configured to: when the current temperature is lower than the first threshold temperature, adjust the current power of the backlight panel to a first enhanced power, wherein the first enhanced power is greater than the current power. In this way, the control device for controlling the power of the backlight panel of the display screen according to the present disclosure can adjust the current power of the backlight panel to the above-mentioned first enhanced power when the current temperature is lower than the first threshold temperature to achieve heating of the display panel without increasing the physical structure of the display screen, thereby reducing the delay of the display panel and thereby ensuring driving safety.

[0062] The following will be described in more detail with the help of the attached appendix. Figure 2 To Attachment Figure 6 To describe the implementation method and technical effect of the innovative technical solution proposed in this disclosure. Specifically, Figure 2 FIG. 2 shows a schematic structural diagram of a display screen 200 for an electronic exterior rearview mirror according to an embodiment of the present disclosure. Figure 3 FIG. 3 is a flow chart showing a method 300 for controlling the power of a backlight panel of a display screen according to an embodiment of the present disclosure. Figure 4 FIG. 4 is a schematic structural diagram of a control device 400 for controlling the power of a backlight panel of a display screen according to an embodiment of the present disclosure. Figure 5 A schematic diagram showing a structure of a control device 500 for controlling the power of a backlight panel of a display screen according to another embodiment of the present disclosure, and Figure 6 A schematic structural diagram of a control device 600 for controlling the power of a backlight panel of a display screen according to yet another embodiment of the present disclosure is shown.

[0063] from Figure 2 It can be seen that the display screen 200 according to the present disclosure includes a glass cover plate 210, a display panel 220 for displaying, and a backlight plate 240. It can be seen that the display screen 200 according to the present disclosure is not as Figure 1Instead of adding a heating layer, the heating characteristics of the display panel are used to control the temperature. This is because the backlight panel of the display screen of the electronic exterior rearview mirror is composed of light-emitting diodes, and its electro-optical conversion efficiency is generally not higher than 30%. The remaining energy is basically converted into heat energy, and there is an energy source for heating here. Therefore, the content of the present disclosure reduces the response time of the display screen at low temperatures while ensuring the original optical properties of the electronic exterior rearview mirror display screen. Here, the display panel of the display screen is an important component of the liquid crystal display screen, and is also the physical material that determines the brightness, contrast, viewing angle, and color of the liquid crystal display screen. In addition, the backlight panel is also an important component of the liquid crystal display screen, which acts as a light source for the liquid crystal display screen. Two important indicators of the display screen include contrast and viewing angle. Specifically, contrast refers to the brightness under the white screen (brightest) divided by the brightness under the black screen (darkest). A larger contrast can display more vivid and rich colors, and the viewing angle refers to the angle at which the user can clearly observe all the contents on the display screen from different directions.

[0064] It can be seen that the present disclosure utilizes the heat-generating property of the backlight panel to heat the display panel. The present disclosure retains the original internal structure of the electronic exterior rearview mirror display screen, so that the optical performance of the display screen will not be attenuated. In addition, the overall logic of the control scheme for improving the display screen response time of the electronic exterior rearview mirror at low temperatures is to run the backlight at high power, that is, to control the display screen backlight brightness at a higher value, to generate heat to heat the display screen.

[0065] The following is based on Figure 3 To describe the control method according to the present disclosure. Figure 3 As shown, the method 300 for controlling the power of the backlight panel of the display screen according to the present disclosure includes at least the following two steps, namely: obtaining the current temperature of the display panel of the display screen in method step 310; and then adjusting the current power of the backlight panel to a first enhanced power when the current temperature is lower than a first threshold temperature in method step 320, wherein the first enhanced power is greater than the current power. In this way, the method 300 for controlling the power of the backlight panel of the display screen according to the present disclosure can increase the current power of the backlight panel to the above-mentioned first enhanced power when the current temperature is lower than the first threshold temperature without adding physical structure to achieve heating of the display panel, thereby reducing the delay of the display panel and thereby ensuring driving safety.

[0066] A control scheme that lists specific temperatures is shown below, but those skilled in the art should understand that the specific temperatures listed here are merely exemplary and non-restrictive, and are not intended to limit the scope of protection of the present disclosure.

[0067] First, during normal startup, for example, the low temperature mode is not entered. For example, when the temperature is greater than or equal to -10°C, the display screen of the electronic exterior rearview mirror will not enter the low temperature mode and will still display at the original brightness. Then, when the temperature drops, when the display screen temperature of the electronic exterior rearview mirror is lower than -10°C, it will enter the low temperature mode, and the flag bit in the memory can be set, and at this time, for example, the display screen brightness can be set to 100% (maximum).

[0068] Subsequently, when the electronic exterior rearview mirror display screen enters the low temperature mode, the temperature does not rise to 10°C, and it is still displayed at 100% brightness. When the temperature rises to more than 10°C, the low temperature mode is exited, the flag bit of the memory can be cleared, and it is still displayed at the original brightness, because there is no need to heat the display screen at this time. Here, the temperature range of -10°C to 10°C is the hysteresis range, and the low temperature mode is not exited during the hysteresis range, and it is displayed at the maximum brightness. When the low temperature mode is entered at a temperature below -10°C, the display screen starts to heat up, and the temperature will soon be greater than -10°C. If the hysteresis range is not set, but the low temperature mode is exited directly when the temperature is greater than -10°C, the display screen will no longer be heated. The display screen temperature will soon be lower than -10°C. In this way, the control program will switch back and forth between the low temperature mode and the normal mode, resulting in the display screen being unable to realize the heating function. It can be seen that through the technical solution of the present disclosure, the problems of display smear and stagnation of the electronic exterior rearview mirror display screen in a low temperature environment can be effectively improved. In addition, the technical solution according to the content of the present disclosure can also ensure that the optical characteristics of the electronic exterior rearview mirror display screen are not attenuated, and users can experience better picture display effects. In summary, the core innovation of the content of the present disclosure is to increase the self-heating power of the electronic exterior rearview mirror display screen in an environment with low ambient temperature by utilizing the heat generation characteristics of the backlight panel of the electronic exterior rearview mirror display screen itself, thereby heating the display screen, improving the response time of the display screen, and solving problems such as screen ghosting and jamming; rather than using an external heating source to destroy the mature and stable structure inside the display screen. The technical solution of the content of the present disclosure can also be applied to vehicle-mounted instrument display screens. When the instrument display screen displays the vehicle speed, the vehicle speed value will change in real time, which also requires the display screen to have a faster response time. When the instrument display screen is at a lower ambient temperature, the response time can also be improved through this invention, allowing the driver to clearly see the changing vehicle speed and ensure driving safety.

[0069] In order to implement the above method 300 for controlling the power of the backlight panel of the display screen, corresponding hardware is required, for example, a temperature sensor is required to obtain the current temperature. Figure 4 FIG. 4 is a schematic diagram showing a structure of a control device 400 for controlling the power of a backlight panel of a display screen according to an embodiment of the present disclosure. Figure 4 It can be seen that the control device 400 for controlling the power of the backlight panel of the display screen according to the present disclosure can be used to control, for example, Figure 2 In the display screen 200 shown, the control device 400 includes, for example, a temperature sensor 410, which is configured to obtain the current temperature of the display panel of the display screen 200. To this end, the temperature sensor 410 is, for example, disposed between the display panel 220 and the backlight panel 240 of the display screen 200, or disposed between the glass cover 210 and the display panel 220, or disposed on the side of the backlight panel 240 away from the display panel 220. In addition, the control device 400 for controlling the power of the backlight panel of the display screen according to the present disclosure can also include a microcontroller 420, which is configured to: when the current temperature is lower than the first threshold temperature, adjust the current power of the backlight panel to a first enhanced power, wherein the first enhanced power is greater than the current power. In this way, the control device 400 for controlling the power of the backlight panel of the display screen according to the content of the present disclosure can adjust the current power of the backlight panel 240 to the above-mentioned first enhanced power to achieve heating of the display panel when the current temperature is lower than the first threshold temperature without increasing the physical structure of the display screen, thereby reducing the delay of the display panel 220 and ensuring driving safety. Specifically, the key components inside the electronic exterior rearview mirror display screen are negative temperature coefficient thermistors and backlight panels. Negative temperature coefficient thermistors are used to detect the internal temperature of the display screen in real time and convert them into analog signals; the backlight panel not only provides background light for the display screen, but also serves as a heat source at low temperatures. The key component inside the controller is a microcontroller unit, which receives temperature information from the display screen, executes response commands through calculations and logical judgments, and sends backlight brightness to the display screen to control the power of the backlight panel.

[0070] Preferably, in one embodiment according to the present disclosure, the microcontroller 420 is further configured to: when the current temperature is not lower than the first threshold temperature and not higher than the second threshold temperature, maintain the power of the backlight unchanged. In this way, a temperature interval can be set, and when the temperature is within the interval, the power of the backlight is maintained unchanged, thereby reducing the difficulty of using the control device 400 for controlling the power of the backlight of the display screen according to the present disclosure and thereby improving the stability of the control device for controlling the power of the backlight of the display screen according to the present disclosure. More preferably, in one embodiment according to the present disclosure, the microcontroller 420 is further configured to: when the current temperature is not lower than the first threshold temperature and not higher than the second threshold temperature, adjust the current power of the backlight to the second enhanced power. In this way, the control device 400 for controlling the power of the backlight of the display screen according to the present disclosure can dynamically adjust the power of the backlight according to the current temperature of the display panel to balance the relationship between heating and power consumption. Further preferably, in an embodiment according to the present disclosure, the microcontroller 420 is further configured to: when the current temperature is higher than a second threshold temperature, determine the driving power of the backlight panel according to the ambient brightness, wherein the second threshold temperature is higher than the first threshold temperature. In this way, the control device 400 for controlling the power of the backlight panel of the display screen according to the present disclosure can determine the driving power of the backlight panel according to the ambient brightness when the delay index of the display panel meets the requirements. Specifically, the power of the backlight panel can be set according to the ambient brightness when the current temperature of the display panel rises to a predetermined temperature, so as to achieve a better display effect.

[0071] Although the various exemplary embodiments of the present disclosure described above can be implemented in hardware or dedicated circuits, the above-mentioned control device 400 for controlling the power of the backlight panel of the display screen can be implemented in the form of hardware or software. This is because: in the 1990s, it was easy to determine whether a technical improvement belonged to a hardware improvement (for example, an improvement to the circuit structure of a diode, transistor, switch, etc.) or a software improvement (for example, an improvement to the method flow). However, with the continuous development of technology, many improvements in method flows today can almost be implemented by programming the improved method flow into the hardware circuit. In other words, by programming different programs for the hardware circuit to obtain the corresponding hardware circuit structure, that is, the change of the hardware circuit structure is achieved, so such an improvement in the method flow can also be regarded as a direct improvement in the hardware circuit structure. Therefore, it cannot be said that an improvement in a method flow cannot be implemented using a hardware entity module. For example, a programmable logic device (PLD) (such as a field programmable gate array (FPGA)) is such an integrated circuit, and its logical function is determined by the user programming the device. Designers can "integrate" a digital system on a programmable logic device by programming it themselves, without having to ask chip manufacturers to design and produce dedicated integrated circuit chips.Moreover, nowadays, instead of manually making integrated circuit chips, this kind of programming is mostly implemented by "logic compiler" software, which is similar to the software compiler used when developing and writing programs, and the original code before compilation must also be written in a specific programming language, which is called hardware description language (HDL). There is not only one HDL, but many kinds, such as ABEL (Advanced Boolean Expression Language), AHDL (Altera Hardware Description Language), Confluence, CUPL (Cornell University Programming Language), HDCal, JHDL (Java Hardware Description Language), Lava, Lola, MyHDL, PALASM, RHDL (Ruby Hardware Description Language), etc. The most commonly used ones are VHDL (Very-High-Speed ​​Integrated Circuit Hardware Description Language) and Verilog. Those skilled in the art should also know that it is only necessary to program the method flow slightly in the above-mentioned hardware description languages ​​and program it into the integrated circuit, and then it is easy to obtain the hardware circuit that implements the logic method flow. In other words, in general, the various example embodiments of the present disclosure may be implemented in hardware or dedicated circuits, software, firmware, logic, or any combination thereof. Certain aspects may be implemented in hardware, while other aspects may be implemented in firmware or software that may be executed by a controller, microprocessor, or other computing device. When various aspects of the embodiments of the present disclosure are illustrated or described as block diagrams, flow charts, or using some other graphical representation, it will be understood that the blocks, devices, systems, techniques, or methods described herein may be implemented in hardware, software, firmware, dedicated circuits or logic, general-purpose hardware or controllers or other computing devices, or some combination thereof as non-limiting examples.

[0072] In addition, the control device for controlling the power of the backlight panel of the display screen may also have other implementation forms. Figure 5 FIG. 4 shows a schematic structural diagram of a control device 500 for controlling the power of a backlight panel of a display screen according to another embodiment of the present disclosure, and FIG. Figure 6 FIG. 6 is a schematic diagram showing a structure of a control device 600 for controlling the power of a backlight panel of a display screen according to another embodiment of the present disclosure. Figure 5It can be seen that the control device 500 for controlling the power of the backlight panel of the display screen includes a memory 510 and a processor 520, and the memory 510 stores executable instructions. When the executable instructions are executed in the processor 520, the processor 520 implements the method 300 for controlling the power of the backlight panel of the display screen proposed in the first aspect of the present disclosure.

[0073] Specifically, when the executable instructions are executed in the processor 520, the processor 520 implements: obtaining the current temperature of the display panel of the display screen; and when the current temperature is lower than the first threshold temperature, adjusting the current power of the backlight panel to the first enhanced power, wherein the first enhanced power is greater than the current power. In this way, the method for controlling the power of the backlight panel of the display screen according to the content of the present disclosure can increase the current power of the backlight panel to the above-mentioned first enhanced power when the current temperature is lower than the first threshold temperature without adding physical structure to achieve heating of the display panel, thereby reducing the delay of the display panel and thereby ensuring driving safety.

[0074] In one embodiment according to the present disclosure, when the executable instructions are executed in the processor 520, the processor 520 implements: when the current temperature is not lower than the first threshold temperature and not higher than the second threshold temperature, the power of the backlight panel is maintained unchanged. In this way, a temperature interval range can be set, and when the temperature is within the interval range, the power of the backlight panel is maintained unchanged, thereby reducing the difficulty of using the method for controlling the power of the backlight panel of the display screen according to the present disclosure and thereby improving the stability of the method for controlling the power of the backlight panel of the display screen according to the present disclosure.

[0075] In one embodiment according to the present disclosure, when the executable instructions are executed in the processor 520, the processor 520 implements: when the current temperature is not lower than the first threshold temperature and not higher than the second threshold temperature, adjusting the current power of the backlight panel to the second enhanced power. In this way, the method for controlling the power of the backlight panel of the display screen according to the present disclosure can dynamically adjust the power of the backlight panel according to the current temperature of the display panel to balance the relationship between heating and power consumption.

[0076] Preferably, in an embodiment according to the present disclosure, the second enhanced power is not higher than the first enhanced power. In this way, the method for controlling the power of the backlight panel of a display screen according to the present disclosure can dynamically adjust the power of the backlight panel according to the current temperature of the display panel. Specifically, it can appropriately reduce the power of the backlight panel when the current temperature of the display panel rises to balance the relationship between heating and power consumption. More preferably, in an embodiment according to the present disclosure, the second enhanced power is associated with the temperature of the display panel. In this way, the method for controlling the power of the backlight panel of a display screen according to the present disclosure can dynamically adjust the power of the backlight panel according to the current temperature of the display panel. Specifically, it can appropriately reduce the power of the backlight panel when the current temperature of the display panel rises to balance the relationship between heating and power consumption.

[0077] In one embodiment according to the present disclosure, when the executable instruction is executed in the processor 520, the processor 520 implements: when the current temperature is higher than the second threshold temperature, the driving power of the backlight panel is determined according to the ambient brightness, wherein the second threshold temperature is higher than the first threshold temperature. In this way, the method for controlling the power of the backlight panel of the display screen according to the present disclosure can determine the driving power of the backlight panel according to the ambient brightness when the delay index of the display panel meets the requirements. Specifically, when the current temperature of the display panel rises to a predetermined temperature, the power of the backlight panel can be set according to the ambient brightness to achieve a better display effect.

[0078] In one embodiment according to the present disclosure, the correspondence between the ambient brightness and the driving power is included in a brightness power table. In this way, the corresponding parameters can be calibrated when the display panel or the display screen including the display panel leaves the factory, so that the configuration of the driving power can be quickly realized. Preferably, in one embodiment according to the present disclosure, determining the driving power of the backlight panel according to the ambient brightness further includes: determining the driving power of the backlight panel according to the ambient brightness by querying the brightness power table. In this way, the corresponding parameters can be calibrated when the display panel or the display screen including the display panel leaves the factory, so that the configuration of the driving power can be quickly realized.

[0079] In one embodiment according to the present disclosure, the current power is determined by querying a brightness power table. In this way, the corresponding parameters can be calibrated when the display panel or the display screen including the display panel leaves the factory, so that the configuration of the driving power can be realized quickly. Preferably, in one embodiment according to the present disclosure, the first enhanced power is the maximum rated power of the backlight panel. In this way, the display panel can be heated at the fastest speed, thereby reducing the delay of the display panel at the fastest speed.

[0080] Now go to Figure 6 ,from Figure 6 It can be seen that the control device 600 for controlling the power of the backlight panel of the display screen can be implemented as Figure 3 The functions of the method 300 for controlling the power of the backlight panel of the display screen. Figure 6 As can be seen in the figure, the control device 600 for controlling the power of the backlight panel of the display screen includes a central processing unit (CPU) 601 (e.g., a processor), which can perform various appropriate actions and processes according to computer program instructions stored in a read-only memory (ROM) 602 or computer program instructions loaded from a storage unit 608 to a random access memory (RAM) 603. In the RAM 603, various programs and data required for the operation of the control device 600 for controlling the power of the backlight panel of the display screen can also be stored. The CPU 601, the ROM 602, and the RAM 603 are connected to each other via a bus 604. An input / output (I / O) interface 605 is also connected to the bus 604.

[0081] A plurality of components in the control device 600 for controlling the power of the backlight panel of the display screen are connected to the I / O interface 605, including: an input unit 606, such as a keyboard, a mouse, etc.; an output unit 607, such as various types of displays, speakers, etc.; a storage unit 608, such as a disk, an optical disk, etc.; and a communication unit 609, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 609 allows the device 600 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0082] The various methods described above, such as the method for controlling the power of the backlight of the display screen, can be executed by the processing unit 601. For example, in some embodiments, the method 300 for controlling the power of the backlight of the display screen can be implemented as a computer software program, which is tangibly contained in a machine-readable medium, such as a storage unit 608. In some embodiments, part or all of the computer program can be loaded and / or installed on the control device 600 for controlling the power of the backlight of the display screen via the ROM 602 and / or the communication unit 609. When the computer program is loaded into the RAM 603 and executed by the CPU 601, one or more actions or steps in the method 100 described above can be executed, namely: obtaining the current temperature of the display panel of the display screen; and when the current temperature is lower than the first threshold temperature, adjusting the current power of the backlight to a first enhanced power, wherein the first enhanced power is greater than the current power. In this way, the method for controlling the power of the backlight panel of a display screen according to the contents of the present disclosure can, without adding physical structure, increase the current power of the backlight panel to the above-mentioned first enhanced power when the current temperature is lower than the first threshold temperature to achieve heating of the display panel, thereby reducing the delay of the display panel and thereby ensuring driving safety.

[0083] In addition, the present disclosure also proposes an electronic rearview mirror, which includes a camera and a display, wherein the display includes the control device for controlling the power of the backlight panel of the display screen according to the present disclosure. In one embodiment according to the present disclosure, the electronic rearview mirror is configured as an electronic exterior rearview mirror or an electronic interior rearview mirror.

[0084] Finally, the present disclosure also proposes a vehicle, which includes the control device for controlling the power of the backlight panel of the display screen proposed above according to the present disclosure or the electronic rearview mirror proposed according to the fourth aspect of the present disclosure.

[0085] In summary, the method for controlling the power of the backlight panel of a display screen and the control device for controlling the power of the backlight panel of a display screen according to the contents of the present disclosure can, without increasing the physical structure of the display screen, increase the current power of the backlight panel to the above-mentioned first enhanced power when the current temperature is lower than the first threshold temperature to achieve heating of the display panel, thereby reducing the delay of the display panel and thereby ensuring driving safety.

[0086] Although the embodiments of the present disclosure have been described with reference to several specific embodiments, it should be understood that the embodiments of the present disclosure are not limited to the specific embodiments disclosed. The embodiments of the present disclosure are intended to cover various modifications and equivalent arrangements included in the spirit and scope of the appended claims. The scope of the claims is consistent with the broadest interpretation, thereby including all such modifications and equivalent structures and functions.

Claims

1. A method for controlling the power of a backlight panel of a display screen, characterized in that: The method comprises: Acquiring a current temperature of a display panel of the display screen; and In a case where the current temperature is lower than a first threshold temperature, the current power of the backlight panel is adjusted to a first enhanced power, wherein the first enhanced power is greater than the current power.

2. The method according to claim 1, characterized in that The method further comprises: When the current temperature is not lower than the first threshold temperature and not higher than the second threshold temperature, the power of the backlight panel is maintained unchanged.

3. The method according to claim 1, characterized in that The method further comprises: When the current temperature is not lower than the first threshold temperature and not higher than the second threshold temperature, the current power of the backlight panel is adjusted to a second enhanced power.

4. The method according to claim 3, characterized in that The second boost power is not higher than the first boost power.

5. The method according to claim 4, characterized in that The second boost power is associated with a temperature of the display panel.

6. The method according to claim 1, characterized in that The method further comprises: In a case where the current temperature is higher than a second threshold temperature, the driving power of the backlight panel is determined according to the ambient brightness, wherein the second threshold temperature is higher than the first threshold temperature.

7. The method according to claim 6, characterized in that The corresponding relationship between the ambient brightness and the driving power is included in the brightness power table.

8. The method according to claim 7, characterized in that Determining the driving power of the backlight panel according to the ambient brightness further includes: The driving power of the backlight panel is determined according to the ambient brightness by querying the brightness power table.

9. The method according to claim 7, characterized in that: The current power is determined by querying a brightness power table.

10. The method according to claim 1, characterized in that The first enhanced power is the maximum rated power of the backlight panel.

11. A control device for controlling the power of a backlight panel of a display screen, characterized in that: The control device comprises: a temperature sensor configured to obtain a current temperature of a display panel of the display screen; and A microcontroller is configured to: when the current temperature is lower than a first threshold temperature, adjust the current power of the backlight panel to a first enhanced power, wherein the first enhanced power is greater than the current power.

12. The control device according to claim 11, characterized in that: The microcontroller is also configured to: When the current temperature is not lower than the first threshold temperature and not higher than the second threshold temperature, the power of the backlight panel is maintained unchanged.

13. The control device according to claim 11, characterized in that: The microcontroller is also configured to: When the current temperature is not lower than the first threshold temperature and not higher than the second threshold temperature, the current power of the backlight panel is adjusted to a second enhanced power.

14. The control device according to claim 11, characterized in that: The microcontroller is also configured to: In a case where the current temperature is higher than a second threshold temperature, the driving power of the backlight panel is determined according to the ambient brightness, wherein the second threshold temperature is higher than the first threshold temperature.

15. A control device for controlling the power of a backlight panel of a display screen, characterized in that: The control device comprises a memory and a processor, wherein the memory stores executable instructions, and when the executable instructions are executed in the processor, the processor implements the method for controlling the power of a backlight panel of a display screen according to any one of claims 1 to 10.

16. An electronic rearview mirror, characterized in that: The electronic rearview mirror comprises a camera and a display, wherein the display comprises a control device for controlling the power of a backlight panel of a display screen according to any one of claims 11 to 15.

17. The electronic rearview mirror according to claim 17, characterized in that: The electronic rearview mirror is configured as an electronic exterior rearview mirror or an electronic interior rearview mirror.

18. A vehicle, characterized in that: The vehicle comprises a control device for controlling the power of a backlight of a display screen according to any one of claims 11 to 15 or an electronic rearview mirror according to claim 16 or 17.

Images