Method for controlling power of backlight plate, control apparatus, electronic rear-view mirror and vehicle

Abstract

A method for controlling the power of a backlight plate, a control apparatus, an electronic rear-view mirror and a vehicle. A method for controlling the power of a backlight plate of a display screen comprises: acquiring the current temperature of a display panel of a display screen; and adjusting the current power of a backlight plate to a first enhanced power when the current temperature is lower than a first threshold temperature, wherein the first enhanced power is greater than the current power.

Description

Method for controlling backlight panel power, control device, electronic rearview mirror and vehicle

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on September 8, 2023, with application number 202311162985.3 and application name “Method, control device, electronic rearview mirror and vehicle for controlling backlight panel power”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] 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

[0003] With the recent official release of the national standard GB15084, vehicles using camera-based monitor systems (CAMS) in place of traditional rearview mirrors are now legally permitted on Chinese roads. A CAM-based monitor system is a small electronic system consisting of three key components: a camera, a monitor, and a controller. The camera captures the exterior scene in real time, processes the image in the controller, and displays it on the in-cabin monitor.

[0004] Unlike traditional rearview mirrors, electronic exterior mirrors offer a wider field of view, ensuring excellent imaging even in inclement weather, such as rain and nighttime. Electronic exterior mirrors require only two cameras, one on each side of the vehicle, resulting in a smaller mirror footprint and reduced wind resistance. Furthermore, to ensure driver safety, electronic exterior mirrors must display the exterior view in real time. This places high demands on the camera monitor system's response time.

[0005] 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, and blue (RGB) color combinations by controlling the flipping of the liquid crystal. All pixels display the corresponding color, ultimately forming a picture. At normal temperature, the LCD response time of the electronic exterior rearview mirror display is about 25ms, and the picture can be displayed smoothly. The response time of the liquid crystal will increase significantly with the decrease in temperature. For example, when the temperature is below -10°C, its response time may be close to 100ms. At this time, the electronic exterior rearview mirror display will begin to experience problems such as image retention, tailing, and lag. The driver's observed rear view through the display 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 at low temperatures.

[0006] Existing technical solutions 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 shows a schematic structural diagram of a display screen for an electronic exterior rearview mirror in the prior art. As can be seen from Figure 1, the display screen for an electronic exterior rearview mirror in the prior art includes at least the following four layers: an outermost glass cover plate 110, a display panel 120 for display, a backlight panel 140, and a heating layer 130 disposed between the display panel 120 and the backlight panel 140. The heating layer 130 heats at low temperatures, thereby increasing the overall temperature of the display panel 120 located thereon, thereby improving the response time and thereby enhancing driving safety.

[0007] However, existing solutions address the low-temperature response delay by providing a heating layer 130, such as heated glass or a membrane, between the electronic rearview mirror's display panel 120 and backlight panel 140. The heated glass / membrane is heated by heating wires attached to the glass or membrane. This connects two power supply pins to the display's flexible printed circuit board (FPC) wiring, and heating is controlled by an external controller. This solution utilizes a large heating wire area to quickly heat the display, thereby reducing response time.

[0008] Compared with the existing technical solution, although adding a heat source can directly solve the low-temperature response problem, it destroys the original internal structure of the electronic rearview mirror display. Regardless of whether heated glass or a diaphragm is added, the transmittance of this layer of medium will inevitably be low due to the presence of the heating wire, and the brightness of the entire electronic rearview mirror display will be greatly reduced. In addition, due to the influence of the edge wiring, the thickness of the electronic rearview mirror display will increase, and the size of the black border will also increase. This is contrary to the trend of narrow-border automotive displays. Furthermore, because the ambient light will add a layer of reflection inside the electronic rearview mirror display, the reflectivity of the entire display will also increase, resulting in a decrease in the human eye's perception of contrast of the electronic rearview mirror display. Finally, the addition of a heating layer will increase the difficulty of the display bonding process, and the defect rate will be significantly increased.

[0009] Summary of the Invention

[0010] In order to solve the above problems, that is, the existing solution of using a heating layer to reduce the display panel delay increases the manufacturing cost, complicates the display structure and reduces the yield, the inventors of the present disclosure innovatively thought of not adding a physical structure, but 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.

[0011] Based on this, a first aspect of the present disclosure provides a method for controlling the power of a backlight panel of a display screen, the method comprising:

[0012] Acquiring the current temperature of the display panel of the display screen; and

[0013] When 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.

[0014] 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.

[0015] In one embodiment according to the present disclosure, the method further includes:

[0016] 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.

[0017] 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.

[0018] In one embodiment according to the present disclosure, the method further includes:

[0019] In a case where 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.

[0020] In this way, the method for controlling the power of the backlight of a 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.

[0021] In one embodiment of the present disclosure, the second boosted power is no higher than the first boosted power. In this manner, the method for controlling the power of a display backlight according to the present disclosure can dynamically adjust the backlight power based on the current temperature of the display panel. Specifically, when the current temperature of the display panel rises, the backlight power can be appropriately reduced to balance heating and power consumption.

[0022] In one embodiment of the present disclosure, the second boost power is associated with the temperature of the display panel. In this way, the method for controlling the power of a display backlight according to the present disclosure can dynamically adjust the power of the backlight according to the current temperature of the display panel. Specifically, when the current temperature of the display panel increases, the power of the backlight can be appropriately reduced to balance the relationship between heating and power consumption.

[0023] In one embodiment according to the present disclosure, the method further includes:

[0024] 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.

[0025] 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.

[0026] 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 of the display panel or the display screen including the display panel can be calibrated before leaving the factory, thereby enabling rapid configuration of the driving power.

[0027] In one embodiment of the present disclosure, determining the driving power of the backlight panel according to the ambient brightness further includes:

[0028] The driving power of the backlight panel is determined according to the ambient brightness by querying the brightness power table.

[0029] In this way, corresponding parameters of the display panel or the display screen including the display panel can be calibrated before leaving the factory, thereby enabling rapid configuration of the driving power.

[0030] In one embodiment of the present disclosure, the current power is determined by querying a brightness power table. In this way, the corresponding parameters of the display panel or a display screen including the display panel can be calibrated before leaving the factory, thereby enabling rapid configuration of the driving power.

[0031] In one embodiment of the present disclosure, the first boost 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.

[0032] 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:

[0033] a temperature sensor configured to obtain a current temperature of a display panel of the display screen; and

[0034] The microcontroller is configured to adjust the current power of the backlight panel to a first enhanced power when the current temperature is lower than a first threshold temperature, wherein the first enhanced power is greater than the current power.

[0035] 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.

[0036] In one embodiment according to the present disclosure, the microcontroller is further configured to:

[0037] 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.

[0038] 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.

[0039] In one embodiment according to the present disclosure, the microcontroller is further configured to:

[0040] In a case where 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.

[0041] In this way, the control device 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 to balance the relationship between heating and power consumption.

[0042] In one embodiment according to the present disclosure, the microcontroller is further configured to:

[0043] 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.

[0044] 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.

[0045] Furthermore, the third aspect of the present disclosure proposes a control device for controlling the power of the backlight panel of a display screen, the control device including a memory and a processor, the memory storing executable instructions, which, when executed in the processor, enables the processor to implement the method for controlling the power of the backlight panel of a display screen proposed in the first aspect of the present disclosure.

[0046] 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.

[0047] In one embodiment of the present disclosure, the electronic rearview mirror is configured as an electronic exterior rearview mirror or an electronic interior rearview mirror.

[0048] 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.

[0049] 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, 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, thereby reducing the delay of the display panel and thereby ensuring driving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] 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 illustrative and non-limiting manner. In the accompanying drawings:

[0051] FIG1 shows a schematic structural diagram of a display screen 100 for an electronic exterior rearview mirror in the prior art;

[0052] FIG2 shows a schematic structural diagram of a display screen 200 for an electronic exterior rearview mirror according to an embodiment of the present disclosure;

[0053] FIG3 shows a flow chart of a method 300 for controlling the power of a backlight panel of a display screen according to one embodiment of the present disclosure;

[0054] FIG4 shows 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;

[0055] FIG5 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

[0056] FIG6 shows 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. DETAILED DESCRIPTION

[0057] The following describes in detail various exemplary embodiments of the present disclosure with reference to the accompanying drawings. Although the exemplary methods and apparatus 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 contemplated that any or all hardware, software, and firmware components may be implemented exclusively in hardware, exclusively in software, or in any combination of hardware and software. Therefore, although exemplary methods and apparatus 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 apparatus are implemented.

[0058] In addition, the flowcharts and block diagrams in the accompanying drawings illustrate possible architectures, functions, and operations of the methods and systems according to 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 the specified function or operation, or may be implemented using a combination of dedicated hardware and computer instructions.

[0059] As used herein, the terms "including," "comprising," and similar terms are open-ended terms, i.e., "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," while the term "another embodiment" means "at least one additional embodiment," and so on.

[0060] As mentioned above, the existing solution for reducing the time delay of display screens at low temperatures basically requires adding an additional heating layer. This, 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.

[0061] To address the aforementioned technical issues, the inventors of this disclosure, building on existing display screen structures, have achieved a heating effect by operating the backlight at high power, thereby reducing response time. This solution maintains brightness of the electronic rearview mirror display without increasing thickness, black border size, or reflectivity, nor does it increase defective rates, thereby improving customer satisfaction and product competitiveness.

[0062] Abstractly speaking, the first aspect of the present disclosure provides a method for controlling the power of a backlight panel of a display screen, the method comprising: obtaining a current temperature of a display panel of the display screen; and, when the current temperature is below 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 manner, the method for controlling the power of a backlight panel of a display screen according to the present disclosure can, without adding any physical structure, increase the current power of the backlight panel to the first enhanced power when the current temperature is below the first threshold temperature to achieve heating of the display panel, thereby reducing the display panel's latency and thereby ensuring driving safety.

[0063] 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 being configured to obtain the current temperature of the display panel of the display screen; and a microcontroller, the microcontroller being 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. In this way, the control device for controlling the power of the backlight panel of the display screen according to the present disclosure can, without increasing the physical structure of the display screen, 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, thereby reducing the delay of the display panel and thereby ensuring driving safety.

[0064] The following will describe in more detail the implementation of the innovative technical solution proposed in accordance with the present disclosure and the technical effects achieved with the aid of the accompanying Figures 2 to 6. Specifically, Figure 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 shows a flow chart of 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 shows 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 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 Figure 6 shows 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.

[0065] As shown in Figure 2, the display screen 200 according to the present disclosure includes a glass cover 210, a display panel 220 for displaying the image, and a backlight 240. This shows that the display screen 200 according to the present disclosure does not incorporate a heating layer as shown in Figure 1, but instead utilizes the heating properties of the display panel to achieve temperature control. This is because the backlight panel of the electronic rearview mirror display screen is composed of light-emitting diodes, whose electro-optical conversion efficiency is generally less than 30%. The remaining energy is essentially converted into heat, thus providing a heating energy source. Therefore, while maintaining the original optical performance of the electronic rearview mirror display screen, the present disclosure reduces the display screen's response time at low temperatures. The display panel is a critical component of the liquid crystal display screen and is the physical material that determines the screen's brightness, contrast, viewing angle, and color. Furthermore, the backlight panel is also a crucial component of the LCD screen, serving as the screen's light source. Contrast and viewing angle are two key display screen performance indicators. Specifically, contrast refers to the brightness of a white screen (brightest) divided by the brightness of a black screen (darkest). A larger contrast ratio can display more vivid and rich colors, while the viewing angle refers to the angle at which the user can clearly observe all the content on the display from different directions.

[0066] This demonstrates that the present disclosure utilizes the inherent heat generation characteristics of the backlight to heat the display panel. This disclosure preserves the original internal structure of the electronic rearview mirror display, ensuring no degradation of the display's optical performance. Furthermore, the overall logic behind the control scheme for improving the electronic rearview mirror's display response time at low temperatures is to operate the backlight at high power, i.e., controlling the display backlight brightness to a higher value, generating heat to heat the display.

[0067] The control method according to the present disclosure is described below with reference to FIG3. As shown in FIG3, 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:

[0068] The method 300 for controlling the power of a display backlight panel according to the present disclosure comprises two steps: obtaining the current temperature of the display panel of the display screen in method step 310; and subsequently adjusting the current power of the backlight panel to a first boosted power when the current temperature is below a first threshold temperature in method step 320, wherein the first boosted power is greater than the current power. In this manner, the method 300 for controlling the power of a display backlight panel according to the present disclosure can, without adding any physical structure, increase the current power of the backlight panel to the first boosted power when the current temperature is below the first threshold temperature to achieve heating of the display panel, thereby reducing display panel latency and ensuring driving safety.

[0069] 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.

[0070] First, during normal startup, the system does not enter low-temperature mode. For example, when the temperature is -10°C or higher, the electronic rearview mirror's display screen does not enter low-temperature mode and continues to display at its original brightness. Then, when the temperature drops below -10°C, the electronic rearview mirror enters low-temperature mode, and a flag in memory is set. At this point, for example, the display screen brightness can be set to 100% (maximum).

[0071] Subsequently, when the electronic exterior rearview mirror display screen enters the low temperature mode, the temperature has not risen 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 memory flag can be cleared, and the display 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. The low temperature mode is not exited during the hysteresis range and it is displayed at maximum brightness. When the temperature is below -10°C, the low temperature mode is entered and the display screen starts to heat up, and the temperature will quickly exceed -10°C. If the hysteresis range is not set, and 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 quickly fall below -10°C again. In this way, the control program will always 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 the technical solution of the present disclosure can effectively improve the problems of display ghosting and jamming of the electronic exterior rearview mirror display screen in low temperature environments. In addition, the technical solution according to the contents 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 contents of the present disclosure is to utilize the heat generation characteristics of the backlight panel of the electronic exterior rearview mirror display screen itself to increase its own heat generation power in an environment with low ambient temperature, thereby heating the display screen, improving the response time of the display screen, and solving problems such as screen ghosting and jamming; rather than relying on an external heating source to destroy the mature and stable structure inside the display screen. The technical solution of the contents 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.

[0072] In order to implement the above-mentioned 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 shows a structural schematic diagram of a control device 400 for controlling the power of the backlight panel of the display screen according to an embodiment of the present disclosure. As can be seen from Figure 4, 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 the display screen 200 as shown in Figure 2. The control device 400, for example, includes: a temperature sensor 410, and the temperature sensor 410 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, arranged between the display panel 220 and the backlight panel 240 of the display screen 200, or arranged between the glass cover 210 and the display panel 220, or arranged on the side of the backlight panel 240 facing away from the display panel 220. Furthermore, the control device 400 for controlling the power of a display backlight according to the present disclosure can further include a microcontroller 420 configured to adjust the current power of the backlight to a first boosted power when the current temperature is below a first threshold temperature, wherein the first boosted power is greater than the current power. In this manner, the control device 400 for controlling the power of a display backlight according to the present disclosure can increase the current power of the backlight 240 to the first boosted power when the current temperature is below the first threshold temperature to heat the display panel, thereby reducing the latency of the display panel 220 and ensuring driving safety. Specifically, the key components within the electronic rearview mirror display are a negative temperature coefficient thermistor and a backlight. The negative temperature coefficient thermistor is used to detect the internal temperature of the display in real time and convert it into an analog signal. The backlight provides background lighting for the display and also serves as a heat source at low temperatures. The key component inside the controller is the microcontroller unit, which receives temperature information from the display screen, executes response commands through calculations and logical judgments, and sends the backlight brightness to the display screen to control the power of the backlight panel.

[0073] Preferably, in one embodiment of the present disclosure, the microcontroller 420 is further configured to maintain the backlight power constant when the current temperature is not lower than the first threshold temperature and not higher than the second threshold temperature. This allows for a set temperature range within which the backlight power is maintained constant, thereby reducing the ease of use of the control device 400 for controlling the power of a display backlight according to the present disclosure and improving the stability of the control device 400 for controlling the power of a display backlight according to the present disclosure. More preferably, in one embodiment of the present disclosure, the microcontroller 420 is further configured to adjust the current backlight power to a second enhanced power when the current temperature is not lower than the first threshold temperature and not higher than the second threshold temperature. In this manner, the control device 400 for controlling the power of a display backlight according to the present disclosure can dynamically adjust the backlight power based on the current temperature of the display panel to balance heating and power consumption. Further preferably, in one embodiment according to the present disclosure, the microcontroller 420 is further configured to: determine the driving power of the backlight panel based on the ambient brightness when the current temperature is higher than a second threshold temperature, wherein the second threshold temperature is higher than the first threshold temperature. In this manner, the control device 400 for controlling the power of the backlight panel of a display screen according to the present disclosure can determine the driving power of the backlight panel based on 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 backlight panel power can be set according to the ambient brightness to achieve a better display effect.

[0074] Although the various exemplary embodiments of the present disclosure described above can be implemented in hardware or dedicated circuits, the control device 400 for controlling the power of the backlight panel of a display screen can be implemented in either hardware or software. This is because, in the 1990s, it was easy to determine whether a technical improvement was a hardware improvement (e.g., an improvement to the circuit structure of a diode, transistor, switch, etc.) or a software improvement (e.g., an improvement to a method flow). However, with the continuous development of technology, many improvements to method flows today can almost all be implemented by programming the improved method flow into a hardware circuit. In other words, by programming different programs into the hardware circuit to obtain the corresponding hardware circuit structure, a change in the hardware circuit structure is achieved. Therefore, such method flow improvements can also be considered direct improvements to the hardware circuit structure. Therefore, it cannot be said that a method flow improvement cannot be implemented using a hardware entity module. For example, a programmable logic device (PLD) (e.g., a field programmable gate array (FPGA)) is such an integrated circuit whose 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, instead of manually fabricating integrated circuit chips, programming is now mostly done with "logic compiler" software. This is similar to the software compilers used when developing programs. Before compilation, the original code must be written in a specific programming language, called a hardware description language (HDL). There are many types of HDL, including 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, and RHDL (Ruby Hardware Description Language). Currently, the most commonly used are VHDL (Very-High-Speed ​​Integrated Circuit Hardware Description Language) and Verilog. Those skilled in the art will also understand that by simply programming the method flow in one of these hardware description languages ​​and then programming it into an integrated circuit, a hardware circuit that implements the logic method flow can be easily obtained. In other words, in general, the various example embodiments of the present disclosure can be implemented in hardware or dedicated circuitry, software, firmware, logic, or any combination thereof. Certain aspects can be implemented in hardware, while other aspects can be implemented in firmware or software that can 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 can be implemented in hardware, software, firmware, dedicated circuitry or logic, general-purpose hardware or a controller or other computing device, or some combination thereof, as non-limiting examples.

[0075] In addition, the control device for controlling the power of the backlight panel of a display screen can also have other implementation forms. Figure 5 shows a structural schematic diagram of a control device 500 for controlling the power of the backlight panel of a display screen according to another embodiment of the present disclosure, and Figure 6 shows a structural schematic diagram of a control device 600 for controlling the power of the backlight panel of a display screen according to yet another embodiment of the present disclosure. As can be seen from Figure 5, the control device 500 for controlling the power of the backlight panel of a 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 a display screen proposed in the first aspect of the present disclosure.

[0076] Specifically, when the executable instructions are executed in the processor 520, the processor 520 is caused to: obtain the current temperature of the display panel of the display screen; and, if the current temperature is lower than a first threshold temperature, adjust the current power of the backlight panel to a first boosted power, wherein the first boosted power is greater than the current power. In this manner, the method for controlling the power of the backlight panel of a display screen according to the present disclosure can, without adding any physical structure, increase the current power of the backlight panel to the first boosted power when the current temperature is lower than the first threshold temperature to achieve heating of the display panel, thereby reducing the display panel's latency and thereby ensuring driving safety.

[0077] In one embodiment of the present disclosure, when the executable instructions are executed in the processor 520, the processor 520 is caused to implement: when the current temperature is not lower than the first threshold temperature and not higher than the second threshold temperature, maintaining the power of the backlight panel unchanged. 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 a display screen according to the present disclosure and thereby improving the stability of the method for controlling the power of the backlight panel of a display screen according to the present disclosure.

[0078] In one embodiment of the present disclosure, when the executable instructions are executed in the processor 520, the processor 520 is caused to adjust the current power of the backlight panel to a second enhanced power if the current temperature is not lower than the first threshold temperature and not higher than the second threshold temperature. 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 to balance the relationship between heating and power consumption.

[0079] Preferably, 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 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 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 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.

[0080] In one embodiment of the present disclosure, when the executable instructions are executed in the processor 520, the processor 520 is caused to implement: when the current temperature is higher than a second threshold temperature, determining the driving power of the backlight panel based on 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 a display screen according to the present disclosure can determine the driving power of the backlight panel based on 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 backlight panel power can be set according to the ambient brightness to achieve a better display effect.

[0081] 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 quickly realized. Preferably, in one embodiment of 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.

[0082] In one embodiment of the present disclosure, the current power is determined by querying a brightness power table. This allows the display panel or display screen including the display panel to be calibrated at the factory, enabling rapid configuration of the drive power. Preferably, in one embodiment of the present disclosure, the first boost power is the maximum rated power of the backlight panel. This allows the display panel to be heated at the fastest possible speed, thereby minimizing the display panel's latency.

[0083] Now turning to FIG. 6 , it can be seen from FIG. 6 that a control device 600 for controlling the power of a backlight panel of a display screen can be implemented to implement the functions of the method 300 for controlling the power of a backlight panel of a display screen in FIG. 6 , the control device 600 for controlling the power of a backlight panel of a display screen includes a central processing unit (CPU) 601 (e.g., a processor) that can perform various appropriate actions and processes according to computer program instructions stored in a read-only memory (ROM) 602 or loaded from a storage unit 608 into a random access memory (RAM) 603. Various programs and data required for the operation of the control device 600 for controlling the power of a backlight panel of a display screen can also be stored in the RAM 603. 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.

[0084] Multiple components in a control device 600 for controlling the power of a backlight panel of a display screen are connected to an 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 magnetic 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 via a computer network such as the Internet and / or various telecommunication networks.

[0085] The various methods described above, such as the method for controlling the power of a backlight panel of a display screen, can be executed by the processing unit 601. For example, in some embodiments, the method 300 for controlling the power of a backlight panel of a display screen can be implemented as a computer software program tangibly embodied in a machine-readable medium, such as the storage unit 608. In some embodiments, part or all of the computer program can be loaded and / or installed into the control device 600 for controlling the power of a backlight panel of a 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 performed, namely: obtaining the current temperature of the display panel of the display screen; and, if the current temperature is below a first threshold temperature, adjusting the current power of the backlight panel to a first boosted power, wherein the first boosted 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.

[0086] The present disclosure also provides an electronic rearview mirror comprising a camera and a display, wherein the display comprises the aforementioned control device for controlling the power of a backlight panel of the display screen according to the present disclosure. In one embodiment of the present disclosure, the electronic rearview mirror is configured as an electronic exterior rearview mirror or an electronic interior rearview mirror.

[0087] 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.

[0088] 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, 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, thereby reducing the delay of the display panel and thereby ensuring driving safety.

[0089] 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 within the spirit and scope of the appended claims. The scope of the claims is to be accorded the broadest interpretation so as to encompass 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 16, 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.

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