Compensation method and apparatus for display screen, and display control device and storage medium

Abstract

The present application is applicable to the technical field of display. Provided are a compensation method and apparatus for a display screen, and a display control device and a storage medium. The method comprises: when a target image is displayed on a display screen, acquiring the present temperature of a target display region, wherein the target display region is any display region among a plurality of display regions comprised in the display screen; on the basis of the present temperature of the target display region, determining a present brightness / chrominance compensation coefficient corresponding to the target display region; on the basis of the present brightness / chrominance compensation coefficient and the present current parameter of a target pixel unit, determining a first current parameter corresponding to the target pixel unit, wherein the target pixel unit is a pixel unit located in the target display region; and adjusting the present current parameter of the target pixel unit to the first current parameter. The present application is used for reducing brightness attenuation of a display screen when the display screen is changed to or is in a hot screen state, thereby improving the display performance and display stability of the display screen; and is used for improving the adjustment precision of the brightness / chrominance of the display screen by means of a current gain.

Description

Display screen compensation method, device, display control equipment and storage medium

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on November 14, 2023, with application number 202311518279.8 and application name “Information processing method, system and storage medium for display screen”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application belongs to the field of display technology, and in particular relates to a compensation method, device, display control equipment and storage medium for a display screen. Background Art

[0003] With the development of LED (light-emitting diode) display technology, LED display screens have been widely used in various fields due to their advantages such as low cost, low power consumption, high visibility and assembly freedom.

[0004] At present, the screen temperature of LED display screen will rise during operation, which is mainly caused by the following factors:

[0005] First, different display areas of the display screen display different content, resulting in different heating in different display areas, which in turn causes the brightness and / or chromaticity of different display areas to be affected differently by temperature. For example, when the brightness of the display content in a certain display area is higher, the heat output of the pixel units in this display area is higher, resulting in a higher screen temperature in this display area, which in turn causes the brightness and chromaticity of this display area to be more severely affected by temperature.

[0006] Second, the different display areas correspond to different display cabinet structures, resulting in different heat dissipation in different display areas. For example, the closer the display area is to the display's power supply, the worse the heat dissipation and the higher the display temperature. The farther the display area is from the power supply, the better the heat dissipation and the lower the display temperature.

[0007] Third, the screen temperature of the display is also related to the ambient temperature of the environment in which the display is located. That is, the higher the ambient temperature of the environment in which the display is located, the slower the heat dissipation of the pixel units in the display. This results in the temperature of the pixel units in the display being higher when the display displays the same image content.

[0008] However, the screen temperature of the LED display will rise, which will affect the overall brightness, color temperature, and display uniformity of the LED display.

[0009] Summary of the Invention

[0010] The embodiments of the present application provide a compensation method, apparatus, display control device, and storage medium for a display screen, which are used to solve the problem of poor overall screen uniformity and stability of an LED display screen due to increased screen temperature when the LED display screen changes from a cold screen state to a hot screen state.

[0011] In a first aspect, an embodiment of the present application provides a compensation method for a display screen, the method comprising: when the display screen displays a target image, obtaining a current temperature of a target display area, the target display area being any one of a plurality of display areas included in the display screen; determining a current brightness and chromaticity compensation coefficient corresponding to the target display area based on the current temperature of the target display area; determining a first current parameter corresponding to the target pixel unit based on the current brightness and chromaticity compensation coefficient and the current current parameter of the target pixel unit, the target pixel unit being a pixel unit located in the target display area; and adjusting the current current parameter of the target pixel unit to the first current parameter.

[0012] In a second aspect, an embodiment of the present application provides a compensation device for a display screen, comprising: a first acquisition module for acquiring a current temperature of a target display area when the display screen displays a target image, the target display area being any one of a plurality of display areas included in the display screen; a first determination module for determining a current brightness and chromaticity compensation coefficient corresponding to the target display area based on the current temperature of the target display area; a second determination module for determining a first current parameter corresponding to a target pixel unit based on the current brightness and chromaticity compensation coefficient and a current current parameter of the target pixel unit, the target pixel unit being a pixel unit located in the target display area; and a control module for adjusting the current current parameter of the target pixel unit to the first current parameter.

[0013] In a third aspect, an embodiment of the present application provides a display control device, comprising: a processor, a memory, and an interface; the processor, the memory, and the interface cooperate with each other so that the display control device executes a compensation method for a display screen as described in any one of the first aspects.

[0014] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, comprising: the computer-readable storage medium includes instructions, which, when executed on a display control device, cause the display control device to execute the steps of the display screen compensation method as described in any one of the first aspects.

[0015] In a fifth aspect, an embodiment of the present application provides a computer program product, which, when executed on a display control device, enables the display control device to execute the display screen compensation method of any one of the above-mentioned first aspects.

[0016] It can be understood that the beneficial effects of the second to fifth aspects mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here.

[0017] In an embodiment of the present application, when a target image is displayed on a display screen, a current brightness and chromaticity compensation coefficient corresponding to the target display area is determined according to the current temperature of the target display area in the display screen, and a first current parameter of the target pixel unit is determined according to the current brightness and chromaticity compensation coefficient and the current current parameter of the target pixel unit in the target display area, so as to adjust the current parameter of the target pixel unit to the first current parameter. In this way, the brightness and chromaticity of each pixel unit in the target display area of ​​the display screen can be compensated, and the brightness of the green and blue sub-pixel units of the display screen in the hot screen state can be avoided. The brightness attenuation caused by the need to compensate for the color temperature when the display screen changes to the hot screen state or is in the hot screen state is reduced, so that the brightness and chromaticity and color temperature of the display screen when it changes to the hot screen state or is in the hot screen state can meet the requirements, which can further improve the display performance and display stability of the display screen.

[0018] Furthermore, by adjusting the current gain of the RGB colors of the pixel unit, the brightness and color of the display screen can be compensated, which can maximize the accuracy of the grayscale adjustment of the display screen, more accurately adjust the brightness and color of the pixel unit of the display screen, and further improve the display effect of the display screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0020] FIG1 is a schematic structural diagram of a receiving card provided in an embodiment of the present application;

[0021] FIG2 is a schematic structural diagram of a processing module provided in an embodiment of the present application;

[0022] FIG3 is a flow chart of a compensation method for a display screen according to an embodiment of the present application;

[0023] FIG4 is a schematic structural diagram of a display screen provided in an embodiment of the present application;

[0024] FIG5 is a second flow chart of the compensation method for a display screen provided in an embodiment of the present application;

[0025] FIG6 is a third flow chart of the compensation method for a display screen provided in an embodiment of the present application;

[0026] FIG7 is a schematic structural diagram of another display screen provided in an embodiment of the present application;

[0027] FIG8 is a fourth flow chart of the compensation method for a display screen provided in an embodiment of the present application;

[0028] FIG9 is a fifth flow chart of a compensation method for a display screen provided in an embodiment of the present application;

[0029] FIG10 is a sixth flow chart of the compensation method for a display screen provided in an embodiment of the present application;

[0030] FIG11 is a seventh flow chart of a compensation method for a display screen provided in an embodiment of the present application;

[0031] FIG12 is a schematic structural diagram of a compensation device for a display screen provided in an embodiment of the present application. DETAILED DESCRIPTION

[0032] In the following description, specific details such as specific system structures and techniques are provided for purposes of illustration rather than limitation to facilitate a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid obscuring the description of the present application with unnecessary detail.

[0033] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or collections thereof.

[0034] It will also be understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0035] As used in this specification and the appended claims, the term "if" can be interpreted as "when" or "upon" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "upon determination" or "in response to determining" or "upon detection of [described condition or event]" or "in response to detecting [described condition or event]," depending on the context.

[0036] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0037] References to "one embodiment" or "some embodiments" in this specification mean that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in one or more embodiments of the present application. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more but not all embodiments," unless otherwise specifically emphasized. The terms "including," "comprising," "having," and variations thereof all mean "including but not limited to," unless otherwise specifically emphasized.

[0038] At present, the screen temperature of LED display screens will rise during operation, which will affect the overall brightness, color temperature and display uniformity of the LED display screen.

[0039] In some scenarios, the three primary colors of the LED display—red light (i.e., red sub-pixel unit), green light (i.e., green sub-pixel unit), and blue light (i.e., blue sub-pixel unit)—are affected differently by temperature. For example, red light is most severely affected by temperature, green light is less affected by temperature, and blue light is least affected by temperature. That is, when the temperature of the LED display is high, the brightness of the red light attenuates most severely. As a result, when the LED display is in the cold screen state, the color temperature of the LED display is warmer due to the higher brightness of the red light. When the LED display is in the hot screen state, the color temperature of the LED display is cooler due to the severe brightness attenuation of the red light. This leads to inconsistent color temperatures between the cold and hot screen states.

[0040] In related art, to address the issue of inconsistent color temperature between cold and hot LED displays, the brightness and color temperature of the hot LED display are often corrected to the same level as in the cold LED display, using the cold LED display as a reference. This approach requires increasing the brightness of the hot LED display. However, due to the limitations of the LED display's maximum grayscale brightness, it's impossible to adjust the brightness of the hot LED display to the same level as in the cold LED display.

[0041] In this regard, in some examples, the brightness of the LED display screen in the hot screen state is adjusted to the maximum grayscale brightness and then no longer adjusted. In this way, the LED display screen still has a large brightness loss in the hot screen state, resulting in poor display effect of the LED display screen in the hot screen state.

[0042] In other examples, when the brightness of the LED display screen in the hot state cannot be increased to meet the brightness requirements, the brightness of the LED display screen in the cold state is reduced to make the color temperature of the LED display screen consistent in the hot and cold states. However, this method causes the brightness of the LED display screen in the cold state to be significantly attenuated, and the brightness of the green and blue lights is sacrificed, resulting in poor display quality in the cold state.

[0043] To address the above technical issues, embodiments of the present application provide a compensation method for a display screen. The method may include: determining, when a target image is displayed on the display screen, a current brightness and chromaticity compensation coefficient corresponding to a target display area in the display screen based on the current temperature of the target display area; and determining a first current parameter of the target pixel unit based on the current brightness and chromaticity compensation coefficient and the current current parameter of the target pixel unit in the target display area, so as to adjust the current parameter of the target pixel unit to the first current parameter. In this way, the brightness and chromaticity of each pixel unit in the target display area of ​​the display screen can be compensated, thereby avoiding sacrificing the brightness of the green and blue sub-pixel units of the display screen in a hot screen state, reducing the brightness attenuation caused by the need to compensate for the color temperature of the display screen in a hot screen state, ensuring that the brightness and chromaticity of the display screen in the hot screen state meet the requirements, and further improving the display performance and display stability of the display screen. Furthermore, by adjusting the current gain of the RGB three colors of the pixel unit to compensate for the brightness and chromaticity of the display screen, the accuracy of the grayscale adjustment of the display screen can be maximized, the brightness and chromaticity of the pixel units of the display screen can be more accurately adjusted, and the display effect of the display screen can be further improved.

[0044] The display screen compensation method provided in the embodiment of the present application can be applied to a display control device. Before introducing the display screen compensation method in the embodiment of the present application, the display control device is first introduced.

[0045] Exemplarily, the display control device can be a receiving card (or an output card). Figure 1 is a schematic diagram of the structure of a receiving card provided in an embodiment of the present application. As shown in Figure 1, the receiving card may include a processing module 101, a first transmission module (transformer, referred to as TF module) 102, a first port physical layer module (physical, referred to as PHY module) 103, a second transmission module 104, a second port physical layer module 105, a microcontroller unit (MCU) 106, a driver chip (IO chip) 107, a memory 108, a flash memory 109, and a power supply 110.

[0046] The first transmission module 102 and the second transmission module 104 can receive data (e.g., image data) transmitted by the transmitter via a high-density Fibre Channel Interface (FCI) connector. The first transmission module 102 transmits the received data to the processing module 101 via the first-port physical layer module 103, and the second transmission module 104 transmits the received data to the processing module 101 via the second-port physical layer module 105. The processing module 101 processes the data and transmits the processed data to the driver chip 107, which controls the display screen for display. Exemplarily, the processing module 101 can be a field programmable gate array (FPGA).

[0047] In addition, the microcontroller 106 is used to pre-process data and obtain sensor parameters. The memory 108 and flash memory 109 are used to store some parameters. The memory 108 can be synchronous dynamic random access memory (SDRAM) or double data rate synchronous dynamic random access memory (DDR). The flash memory 109 can be an external flash memory. The power supply 110 is used to power the processing module 101, the first transmission module 102, the first port physical layer module 103, the second transmission module 104, the second port physical layer module 105, the microcontroller 106, the driver chip 107, the memory 108, and the flash memory 109.

[0048] In some examples, the framework structure of the processing module is described by taking the processing module as an FPGA as an example. Figure 2 is a structural diagram of a processing module according to an embodiment of the present application. As shown in Figure 2, the processing module may include a receiving submodule (i.e., a receive submodule) 201, a bus control submodule (i.e., a bus control submodule) 202, a conversion submodule (i.e., a convert submodule) 203, and a scanning submodule (i.e., a scan submodule) 204. Among them, the receiving submodule 201 is used to unpack and obtain image data. The bus control submodule 202 is used to store image data. The conversion submodule 203 processes the image data through a variety of serial algorithms. The scanning submodule 204 is used to control the driver chip of the display screen.

[0049] Optionally, through the conversion submodule 203, the brightness and chromaticity information can be compensated according to the brightness and chromaticity compensation coefficient, and the current parameters can also be compensated according to the brightness and chromaticity compensation coefficient to compensate the image data (ie, RGB data) and thus correct the brightness and chromaticity of the display screen.

[0050] Optionally, through the conversion submodule 203, the brightness and chromaticity information can be compensated by the thermal compensation coefficient (i.e., the uniformity compensation coefficient), and the current parameters can be compensated according to the brightness and chromaticity compensation coefficient to compensate the image data (i.e., RGB data), thereby correcting the uniformity of the display screen.

[0051] The compensation method for a display screen provided in an embodiment of the present application is schematically described below with reference to the accompanying drawings.

[0052] Please refer to Figure 3, which shows a schematic flow chart of a display screen compensation method provided in an embodiment of the present application. This method can be applied to a display control device. It should be understood that the display control device can be the receiving card provided in the aforementioned embodiment, and this application does not limit this. Furthermore, the display screen targeted by this embodiment can be an LED display screen.

[0053] As shown in FIG3 , the display screen compensation method includes the following steps 310 to 340 .

[0054] Step 310 : When the display screen displays the target image, obtain the current temperature of the target display area.

[0055] The display screen may include multiple display areas. The display contents corresponding to different display areas (i.e., the partial image area of ​​the target image corresponding to a display area) may be the same or different. For example, as shown in FIG4 , the display screen may include nine display areas.

[0056] Optionally, the display screen can be divided into multiple display areas according to the structure of the display screen. In one possible implementation, the area where a pixel unit (i.e., LED lamp bead) is located in the display screen can be used as a display area, that is, a display area can only include one pixel unit. In another possible implementation, the display area of ​​the display screen can be divided according to the display module. Exemplarily, the area where a display module is located is used as a display area, wherein a display module can include multiple pixel units. In another implementation, the display area of ​​the display screen can be divided according to the receiving card, wherein a receiving card can control a sub-display screen. Exemplarily, the area where a sub-display screen is located (i.e., the area corresponding to a receiving card) is used as a display area. Among them, a sub-display screen can include multiple display modules, and a display module can include multiple pixel units.

[0057] In this embodiment, on the one hand, since the content displayed in different display areas (i.e., the partial image area corresponding to a display area in the target image) may be different, the heat generation of different display areas is different, which in turn causes the brightness and / or chromaticity of different display areas to be affected by temperature to different extents. For example, when a certain display area is seriously heated, the display area is seriously affected by temperature, the brightness of the display area will decay, and the color temperature of the display area will also shift (such as the color temperature is colder). On the other hand, the box structure of the display screen corresponding to different display areas is different, resulting in different heat dissipation of different display areas. For example, the closer the display area is to the power supply of the display screen, the worse the heat dissipation of the display area is, and the temperature of the display area is higher; the farther the display area is from the power supply of the display screen, the better the heat dissipation of the display area is, and the temperature of the display area is lower. Therefore, when the display screen displays the target image, the temperature of different display areas of the display screen is different. However, the different temperatures of different display areas will cause the brightness and chromaticity of different display areas to be affected by temperature to different extents. Therefore, when the display screen displays the target image, the current temperature of each display area is obtained respectively, and then combined with the subsequent steps, the current brightness and chromaticity compensation coefficient corresponding to each display area can be determined according to the current temperature of each display area, so as to perform brightness and chromaticity compensation on each display area based on the current brightness and chromaticity compensation coefficient corresponding to each display area.

[0058] The target display area can be any one of the multiple display areas included in the display screen. For example, as shown in FIG4 , taking a display screen including nine display areas as an example, the target display area can be, for example, display area 41. The current temperature of the target display area refers to the screen temperature of the display screen at the target display area at the current moment.

[0059] The following uses the target display area in the display screen as an example to schematically illustrate the process of obtaining the current temperature of the display area.

[0060] In some embodiments, when the target image is displayed on the display screen, the current temperature of the target display area can be predicted based on the grayscale information of the target display area. For example, as shown in FIG5 , step 310 may include the following steps:

[0061] Step 510 : When the display screen displays the target image, a first reference image including the display screen is acquired, and current grayscale information corresponding to each of the plurality of display areas is determined based on the first reference image.

[0062] Specifically, after the target image is displayed on the display screen, the target image displayed on the display screen is photographed by a camera at the current moment to obtain a first reference image. The current grayscale information of the display screen can be determined by statistically analyzing the image data of the first reference image. For example, the first reference image can be a grayscale image, and the current grayscale information of the display screen can be determined based on the brightness information of each pixel (i.e., pixel unit) in the first reference image.

[0063] Optionally, the current grayscale information of each display area is determined with one display area as a statistical unit. The following takes any display area as an example to illustrate the process of obtaining the current grayscale information corresponding to the display area.

[0064] In some examples, taking a display area including only one pixel unit as an example, obtaining the current grayscale information (or current brightness) of the pixel unit in the display area means obtaining the current grayscale information corresponding to the display area.

[0065] In some examples, taking a display area as the area where a display module is located, and a display module including multiple pixel units as an example, current grayscale information of any pixel unit among the multiple pixel units included in the display module can be obtained, and the current grayscale information of the pixel unit can be used as the current grayscale information corresponding to the display area. Alternatively, current grayscale information of each pixel unit among the multiple pixel units can be obtained, and a weighted average of the current grayscale information of the multiple pixel units can be used as the current grayscale information corresponding to the display area.

[0066] In some examples, taking a display area as the area where a sub-display screen is located (i.e., the area corresponding to a receiving card), the current grayscale information of any pixel unit among the multiple pixel units included in the sub-display screen can be obtained, and the current grayscale information of the pixel unit can be used as the current grayscale information corresponding to the display area. Alternatively, the current grayscale information of each pixel unit among the multiple pixel units included in the sub-display screen can be obtained, and the weighted average of the current grayscale information of the multiple pixel units can be used as the current grayscale information corresponding to the display area.

[0067] In some examples, current grayscale information of each pixel unit among multiple pixel units included in the entire display screen may be obtained, and a weighted average of the current grayscale information of the multiple pixel units may be used as the current grayscale information corresponding to the display area.

[0068] That is, when counting the current grayscale information of each display area of ​​the display screen, the statistics can be performed pixel by pixel, which can improve the statistical accuracy. When counting the current grayscale information of each display area of ​​the display screen, the current grayscale information of each display area can also be counted based on the display module, receiving card, or the entire display screen as the statistical unit, which can improve the statistical efficiency.

[0069] It should be noted that, when obtaining the current grayscale information of the display area, the red brightness statistical value, the green brightness statistical value and the blue brightness statistical value of the plurality of pixel units in the display area may be counted.

[0070] Step 520 : Determine the current heating power corresponding to each display area according to the current grayscale information corresponding to each display area.

[0071] The current heating power corresponding to the display area is the heating power of the display area at the current moment.

[0072] For example, the current heating power corresponding to each display area can be calculated according to the following formula 1. k,i =pr·APL_R k,i +pg·APL_G k,i +pb·APL_B k,i (1)

[0073] Among them, P k,i APL_R represents the current heating power of the i-th display area (i.e., any display area, i.e., the target display area) at the k-th moment (i.e., the current moment) in the display screen; k,i represents the red brightness statistical value of the i-th display area in the display screen at the k-th moment; pr represents the heat power generated by the red unit brightness; APL_G k,i represents the green brightness statistics of the i-th display area in the display screen at the k-th moment; pg represents the heat power generated by the green unit brightness; APL_B k,i represents the blue brightness statistical value of the i-th display area in the display screen at the k-th time; pb represents the heat power generated by the unit brightness of blue. It should be noted that the three parameters pr, pg, and pb can be set based on actual experience or experimental data, and are not limited to this embodiment of the present application.

[0074] Step 530 : determining the current temperature corresponding to each display area based on the temperature prediction model, the current ambient temperature information of the environment where the display screen is located, and the current heating power corresponding to each display area.

[0075] In this embodiment, on the one hand, the temperature of the pixel unit in the display screen (i.e., the heating condition) is correlated with the image content currently displayed on the display screen (i.e., the image content displayed in the display area where the pixel unit is located). Different image contents currently displayed on the display screen result in different current heating power of the display screen (i.e., different current heating power of the pixel unit in the display screen). Therefore, the temperature of the pixel unit in the display screen is correlated with the current heating power of the display screen. For example, the higher the brightness of the image currently displayed on the display screen, the greater the current heating power of the display screen, and the higher the temperature of the pixel unit in the display screen (i.e., the screen temperature of the display area where the pixel unit is located); and the lower the brightness of the image currently displayed on the display screen, the lower the current heating power of the display screen, and the lower the temperature of the pixel unit in the display screen. On the other hand, the temperature of a certain pixel unit (or a certain display area) in the display screen is not only affected by the heating power of the pixel unit (or the display area), but also by other pixel units (or other display areas) in the display screen. Among them, other pixel units can be pixel units near the pixel unit, and other display areas can be display areas near the display area. On the other hand, the temperature of the pixel units (or display areas) in a display screen is also related to the ambient temperature of the display's environment. Specifically, the higher the ambient temperature of the display's environment, the slower the heat dissipation of the pixel units. This results in higher pixel temperatures when the display screen displays the same image content. Therefore, based on the current heat generation power corresponding to each display area in the display screen, the current ambient temperature of the display's environment, and a temperature prediction model, the current temperature corresponding to each display area can be determined, thereby obtaining the current temperature of the target display area.

[0076] Among them, the temperature prediction model is used to reflect the temperature rise value of the first display area caused by the power consumption of the second display area when the display screen displays the target image. The first display area is any display area among multiple display areas, and the second display area includes display areas among multiple display areas except the first display area.

[0077] For example, the temperature prediction model can be represented by a thermal resistance matrix. Specifically, the thermal resistance matrix can be represented as:

[0078] Among them, R ij R represents the coupled temperature rise thermal resistance caused by the application of power to the j-th display area (i.e., the second display area) in the i-th display area (i.e., the pixel unit in the i-th display area, i.e., the pixel unit in the first display area), i.e., the temperature rise value caused by the heat power consumption of the j-th display area (i.e., the pixel unit in the j-th display area, i.e., the pixel unit in the second display area) in the i-th display area (i.e., the first display area); iiIt represents the thermal resistance of the pixel unit in the i-th display area, that is, it represents the temperature rise value caused by the pixel unit in the i-th display area due to its own unit power consumption.

[0079] For example, the current temperature corresponding to each display area in the display screen can be calculated according to the following formula 2.

[0080] Among them, T_LED k,i represents the current temperature of the i-th display area (i.e., the target area) at the k-th moment (i.e., the current moment); P k,i represents the heating power of the i-th display area at the k-th moment; Tamb k Indicates the current ambient temperature information of the display screen at the kth moment.

[0081] Exemplarily, the current ambient temperature information of the environment in which the display screen is located may include multiple ambient temperatures corresponding to different areas in the environment in which the display screen is located.

[0082] In this embodiment, since the ambient temperature of the display screen is a variable that changes at a low frequency, a temperature sensor can be arranged in the display screen to collect the ambient temperature of the display screen.

[0083] Optionally, during the operation of the display screen, the display screen will generate heat, causing the temperature of the air around the display screen to rise. Based on the principle of thermal expansion and contraction, the hot air will float up, which will cause the temperature of the air around the upper part of the display screen to be higher than the temperature of the air around the lower part of the display screen, thereby causing the color temperature of the upper part of the display screen to be colder, while the color temperature of the lower part of the display screen is warmer. Therefore, as a possible implementation method, the multiple ambient temperatures corresponding to the above-mentioned different areas can be multiple ambient temperatures corresponding to different heights. Exemplarily, multiple temperature sensors are set in the environment where the display screen is located, and the multiple temperature sensors are distributed along the height direction of the display screen, and then multiple ambient temperatures are collected by multiple sensors. In this way, when predicting the current temperature of display areas at different heights, the ambient temperatures corresponding to different heights can be used, which can improve the accuracy of the screen temperature prediction of the display screen and obtain a more accurate current temperature of the display area.

[0084] As another possible implementation, a first temperature sensor and a second temperature sensor are disposed in the environment of the display screen, and the first and second temperature sensors are distributed along the height of the display screen. When acquiring multiple ambient temperatures corresponding to different heights in the environment of the display screen, the first ambient temperature is acquired by the first temperature sensor, and the second ambient temperature is acquired by the second temperature sensor. The ambient temperature deviation between the first and second ambient temperatures is determined. Based on the ambient temperature deviation, the first and second ambient temperatures are vertically upsampled to obtain multiple ambient temperatures corresponding to each vertical region. In this way, while more accurately acquiring the ambient temperature at different heights in the environment of the display screen, the number of sensors deployed can be reduced, thereby lowering costs.

[0085] The process of generating a temperature prediction model is schematically described below.

[0086] In some embodiments, as shown in FIG6 , the display screen compensation method may further include the following steps:

[0087] Step 610 : When the display screen displays a test image, obtain a second reference image including a display screen of the display screen, and determine test grayscale information corresponding to each display area included in the display screen based on the second reference image.

[0088] In this embodiment, the display screen displays the test image, that is, the test image is displayed in each display area of ​​the display. Optionally, the test images displayed in each display area can be the same or different.

[0089] Exemplarily, the second reference image is a grayscale image. Based on the brightness information of each pixel (i.e., pixel unit) in the second reference image, the test grayscale information of each display area in the display screen can be determined. It should be noted that the specific implementation method for determining the test grayscale information corresponding to each display area can refer to the specific implementation method for determining the current grayscale information corresponding to each display area in step 510 above. To avoid repetition, this embodiment does not limit this.

[0090] Step 620 : Determine the test heating power corresponding to each display area according to the test grayscale information corresponding to each display area.

[0091] Specifically, the specific implementation method of testing the heating power corresponding to each display area can refer to the specific implementation method of determining the current heating power corresponding to each display area in the aforementioned step 530. To avoid repetition, it will not be repeated here.

[0092] Step 630: Acquire the test environment temperature of the environment where the display screen is located and the test temperature corresponding to each display area in the display screen.

[0093] The test temperature corresponding to each display area in the display screen is the actual measured temperature, for example, the test temperature corresponding to each display area in the display screen is collected by a temperature sensor.

[0094] It should be noted that the specific implementation method of obtaining the test environment temperature of the display screen environment can refer to the specific implementation method of the current environment temperature information of the display screen environment mentioned above, and will not be repeated here to avoid repetition.

[0095] Step 640 : determining a temperature prediction model based on the test environment temperature, the test temperature corresponding to each display area, and the test heating power corresponding to each display area.

[0096] For example, the display screen shown in FIG7 includes nine display areas. These nine display areas display different image contents. For example, the display contents of the nine display areas are Pattern 1, Pattern 2, Pattern 3, Pattern 4, Pattern 5, Pattern 6, Pattern 7, Pattern 8, and Pattern 9. The thermal resistance matrix is ​​calculated according to the following formula 3.

[0097] in, Indicates the test temperature of nine display areas; Indicates the heating power of the nine display areas (i.e., the heating power of different patterns); T_amb indicates the test environment temperature.

[0098] That is to say, the thermal resistance matrix of the display screen can be obtained by substituting the test temperature of the nine display areas, the heat generation power of the nine display areas and the test environment temperature into the above formula 3.

[0099] Optionally, when determining the thermal resistance matrix, part of the multiple display areas included in the display screen can be used as test areas, and a reference thermal resistance matrix can be determined based on the test environment temperature, the test temperature corresponding to each test area, and the test heating power corresponding to each test area. The values ​​in the reference thermal resistance matrix are upsampled to obtain a thermal resistance matrix (i.e., a temperature prediction model). The reference thermal resistance matrix is ​​used to reflect the temperature rise value generated by the power consumption of the second test area in the first test area when the test image is displayed on the display screen. The first test area is any test area among the multiple test areas, and the second test area includes the test areas other than the first test area among the multiple test areas. In this way, when predicting the screen temperature of the display screen based on the image content, the prediction can be made pixel by pixel, or by display module or receiving card, which can improve data processing efficiency and reduce the number of sensors arranged.

[0100] For example, if the resolution of the display screen is N1*M1, and the resolution of the partition collected during the test (i.e., the partition formed by multiple test areas) is N2*M2, then after obtaining the reference thermal resistance matrix corresponding to N2*M2, the reference thermal resistance matrix is ​​upsampled to a size of N1*M1 to obtain the thermal resistance matrix. For example, the upsampling can use a bilinear interpolation algorithm, etc.

[0101] It should be noted that before using the display screen, the display screen can be calibrated to determine the temperature prediction model. During the use of the display screen, the determined temperature prediction model can be directly used to predict the temperature of each display area of ​​the display screen.

[0102] In some embodiments, after obtaining the current temperature of the target display area, the method may further include:

[0103] Based on the temperature, time parameters, and space parameters of the target display area in a preset time period, the current temperature of the target display area is processed to obtain a processed current temperature corresponding to the target display area.

[0104] The preset time period may be a time period from a preset time (such as the knth time) before the current time (ie the kth time) to the current time.

[0105] For example, the processed current temperature corresponding to the target display area may be calculated according to the following formula 4.

[0106] Among them, T_LED′ k,i Indicates the current temperature after processing corresponding to the i-th display area (i.e., the target display area); T_LED k-t,i represents the temperature of the ith display area at any moment within the preset time period; ω t Represents the time parameter (i.e., the denoising weight factor in time); Represents the spatial parameter (i.e., the spatial denoising weight factor).

[0107] In this embodiment, the current temperature of the target display area is processed based on the temperature, time parameters and space parameters of the target display area in a preset time period, which can reduce the deviation and noise of the predicted screen temperature and improve the accuracy of the screen temperature prediction.

[0108] In other embodiments, a third temperature sensor may be provided in the target display area of ​​the display screen. When the display screen displays the target image, the current temperature of the target display area may be acquired through the third temperature sensor.

[0109] Optionally, when arranging temperature sensors for collecting the screen temperature of the display screen on the display screen, multiple temperature sensors can be set for each pixel unit of the display screen, or multiple temperature sensors can be set for each display module of the display screen, or multiple temperature sensors can be set for each box of the display screen (i.e., sub-display screen, i.e., receiving card). In this way, when obtaining the current temperature of the target display area, the current temperature of the target display area is determined based on the temperature values ​​collected by one or more temperature sensors arranged in the target display area.

[0110] In this embodiment, the more temperature sensors are arranged on the display screen, the more accurate the screen temperature of the display screen is. In specific implementation, the number and location of the temperature sensors can be adjusted according to actual conditions. This can reduce the number of temperature sensors while ensuring the accuracy of the screen temperature detection, thereby reducing costs and installation difficulty.

[0111] After step 310 , step 320 is executed to determine the current brightness and chromaticity compensation coefficient corresponding to the target display area according to the current temperature of the target display area.

[0112] In some embodiments, as shown in FIG8 , step 320 may include:

[0113] Step 810: Determine a second temperature deviation of the current temperature of the target display area relative to the preset temperature.

[0114] The preset temperature (i.e., the reference temperature) may be the screen temperature when the display screen is operating normally. That is, when the screen temperature of the display screen is at the preset temperature, the display screen will not experience significant brightness attenuation. The preset temperature may be set based on actual experience, for example, 25°C.

[0115] The second temperature deviation may represent a temperature increment of a current temperature of the target display area relative to a preset temperature.

[0116] For example, the second temperature deviation can be calculated according to the following formula 5: ΔT_LED k,i =T_LED k,i -T_LED base (5)

[0117] Where ΔT_LED k,i Indicates the second temperature deviation corresponding to the target display area; T_LED k,i Indicates the temperature of the target display area at time k (i.e., current temperature); T_LED base Indicates the preset temperature.

[0118] Step 820: Obtain target temperature compensation parameters corresponding to the target display area.

[0119] The target temperature compensation parameter is used to indicate the change in brightness and chromaticity information of the target display area per unit temperature, that is, the relative change in brightness and chromaticity information in the target display area of ​​the display screen for every 1°C increase in screen temperature in the target display area of ​​the display screen.

[0120] In this embodiment, since changes in screen temperature will cause changes in the brightness and chromaticity information of each display area in the display screen, and since the brightness of the display screen changes linearly with temperature, the screen temperature changes over time as the display screen changes from a cold screen state to a hot screen state (also known as a thermal equilibrium state). Temperature compensation parameters can be obtained by calibrating the brightness and chromaticity information of the display screen at different temperatures. The cold screen state can be the state when the display screen is powered off or immediately after powering on. The hot screen state can be the state after the display screen is powered on and the screen temperature rises and no longer changes.

[0121] The following schematically illustrates the calibration process of the target temperature compensation parameters corresponding to the target display area by taking the target display area in the display screen as an example.

[0122] In some embodiments, as shown in FIG9 , the display screen compensation method may further include the following steps:

[0123] Step 910: When the display screen changes from a cold screen state to a hot screen state, obtain a sample brightness and chromaticity set and a sample temperature set corresponding to the target display area. The sample brightness and chromaticity set includes multiple sample brightness and chromaticity information, and the sample temperature set includes multiple sample temperatures. The multiple sample brightness and chromaticity information correspond one-to-one to the multiple sample temperatures.

[0124] The sample brightness and chromaticity information may be RGB tristimulus values. For example, the sample brightness and chromaticity information may be RGB tristimulus values ​​of any pixel unit in the target display area, or an average of RGB tristimulus values ​​of multiple pixel units in the target display area.

[0125] Step 920 : Linearly fitting is performed on the brightness and chromaticity information of the plurality of samples and the temperature of the plurality of samples to obtain a slope parameter. The slope parameter is used to indicate the relationship between the brightness and chromaticity information of the target display area and the temperature.

[0126] The slope parameter can be represented by a slope matrix. For example, the slope matrix is ​​a 3*3 matrix.

[0127] For example, at different moments (i.e., moment n, where n = 0, 1, 2, 3, ..., T), the red, green, and blue tristimulus values ​​(i.e., sample brightness and chromaticity information) of any pixel unit in the target display area and the screen temperature corresponding to the target display area (i.e., sample temperature) are collected. A linear fit is performed on the red, green, and blue tristimulus values ​​collected at different moments and the screen temperature to obtain a slope matrix [K].

[0128] For example, the red, green, and blue tristimulus values ​​of any pixel unit can be expressed as:

[0129] Where n = 0, 1, 2, 3,…, T.

[0130] Step 930: Determine the target temperature compensation parameter based on the slope parameter and the brightness and chromaticity change information corresponding to the target display area, wherein the brightness and chromaticity change information indicates the change between the brightness and chromaticity information of the target display area in the hot screen state and the brightness and chromaticity information of the target display area in the cold screen state.

[0131] For example, the target temperature compensation parameter can be calculated according to the following formula 6.

[0132] Wherein, [γ] represents the target temperature compensation parameter; [K] represents the slope matrix (i.e., slope parameter); The tristimulus values ​​of the pixel units in the target display area collected at time 0, that is, the tristimulus values ​​of the pixel units in the target display area when the display screen is in a cold screen state.

[0133] Step 830: Determine the current brightness and chromaticity compensation coefficients according to the second temperature deviation and the target temperature compensation parameter.

[0134] For example, the current brightness and chromaticity compensation coefficient can be calculated according to the following formula 7. [δ] k,i =[1+[γ]·ΔT_LED k,i ] -1 (7)

[0135] Where [δ] k,i represents the current brightness and chromaticity compensation coefficient of the i-th display area (target display area) at the k-th moment (i.e., the current moment); [γ] represents the target temperature compensation parameter corresponding to the target display area; ΔT_LED k,i represents the second temperature deviation corresponding to the target display area at the kth moment.

[0136] In some embodiments, only brightness compensation can be performed on the display screen. Specifically, when performing brightness compensation on the display screen, the target temperature compensation parameter of the target display area is determined based on the red, green, and blue brightness data of the target display area, and the current brightness and chromaticity compensation coefficient is then determined based on the target temperature compensation parameter and the second temperature deviation.

[0137] The non-main diagonal elements of the red, green, and blue tristimulus values ​​are set to 0 to obtain the red, green, and blue brightness data. The red, green, and blue brightness data can be expressed as:

[0138] Where n = 0, 1, 2, 3,…, T.

[0139] That is, the non-main diagonal elements of the obtained slope matrix, target temperature compensation parameter, and current brightness and chromaticity compensation coefficient are also zero.

[0140] It should be noted that the user can choose to compensate for the brightness and chromaticity of the display screen, or compensate for the brightness of the display screen according to actual needs.

[0141] After step 320 , step 330 is executed to determine a first current parameter corresponding to the target pixel unit according to the current brightness and chromaticity compensation coefficient and the current current parameter of the target pixel unit. The target pixel unit is a pixel unit located in the target display area.

[0142] Exemplarily, the current current parameter may include a current current duty cycle of the target pixel unit and / or a current current amplitude of the target pixel unit.

[0143] The target pixel unit includes a red sub-pixel unit, a green sub-pixel unit and a blue sub-pixel unit, and the current current parameter includes a red current component corresponding to the red sub-pixel unit, a green current component corresponding to the green sub-pixel unit and a blue current component corresponding to the blue sub-pixel unit.

[0144] In some examples, a first current parameter corresponding to the target pixel unit is determined based on the current brightness and chromaticity compensation coefficient and the current current parameter of the target pixel unit, including: determining the compensated red current component based on the current brightness and chromaticity compensation coefficient and the red current component; determining the compensated green current component based on the current brightness and chromaticity compensation coefficient and the green current component; and determining the compensated blue current component based on the current brightness and chromaticity compensation coefficient and the blue current component.

[0145] Exemplarily, the first current parameter can be calculated according to the following formula 8.

[0146] in, Indicates the current parameter corresponding to the target pixel unit; I R_inrepresents the red current component corresponding to the red sub-pixel unit; T G_in Represents the green current component corresponding to the green sub-pixel unit; I B_in Represents the blue current component corresponding to the blue sub-pixel unit;

[0147] represents the first current parameter corresponding to the target pixel unit; I R_oyt1 Represents the red current component after compensation; I G_out1 Represents the green current component after compensation; I B_out1 Represents the blue current component after compensation;

[0148] [δ] k,i Represents the current brightness and chromaticity compensation coefficient of the i-th display area (target display area) at the k-th moment (i.e., the current moment).

[0149] Step 340: Adjust the current parameter of the target pixel unit to a first current parameter.

[0150] In this embodiment, the first current parameter may include a first current duty cycle and / or a first current amplitude. When the current parameter of the target pixel unit is the first current parameter, the brightness and color temperature of the target pixel unit meet the requirements.

[0151] In some examples, when the current current parameter of the target pixel unit is adjusted to the first current parameter, the current duty cycle of the target pixel unit can be adjusted so that the current duty cycle of the target pixel unit is the first current duty cycle. In other examples, when the current current parameter of the target pixel unit is adjusted to the first current parameter, the current amplitude of the target pixel unit can also be adjusted so that the current amplitude of the target pixel unit is the first current amplitude. In some other examples, when the current current parameter of the target pixel unit is adjusted to the first current parameter, the current duty cycle and the current amplitude of the target pixel unit can also be adjusted simultaneously, that is, the current current parameter of the target pixel unit is adjusted by a mixed modulation method of pulse amplitude modulation (PAM) and pulse width modulation (PWM) so that the current duty cycle of the target pixel unit is the first current amplitude, and the current amplitude of the target pixel unit is the first current amplitude.

[0152] In some embodiments, the display screen includes a first control; adjusting the current parameter of the target pixel unit to the first current parameter includes: receiving a first operation of the user on the first control; and adjusting the current parameter of the target pixel unit to the first current parameter in response to the first operation.

[0153] Among them, the first control can be, for example, an adjustment lever, and the adjustment range of the adjustment lever can indicate the current operating range of the display screen. The first operation can be an operation in which the user adjusts the lever value of the adjustment lever, and different lever values ​​correspond to different current parameters. In a specific implementation, when the brightness of the display screen is attenuated due to a high screen temperature, the user can adjust the lever value of the adjustment lever to adjust the current parameter of each pixel unit in the display screen to the current parameter corresponding to the lever value, thereby compensating for the brightness and color of the display screen and improving the display effect of the display screen. This method is easy to operate and provides a better user experience.

[0154] In an embodiment of the present application, when a display screen displays a target image, a current brightness and chromaticity compensation coefficient corresponding to the target display area is determined based on the current temperature of the target display area in the display screen. Furthermore, a first current parameter of the target pixel unit is determined based on the current brightness and chromaticity compensation coefficient and the current current parameter of the target pixel unit in the target display area, so that the current parameter of the target pixel unit is adjusted to the first current parameter. This compensates for the brightness and chromaticity of each pixel unit in the target display area of ​​the display screen, avoids sacrificing the brightness of the green and blue sub-pixel units of the display screen in a hot screen state, reduces the brightness attenuation caused by the need to compensate for color temperature when the display screen changes to or is in a hot screen state, ensures that the brightness and chromaticity of the display screen meet the requirements when it changes to or is in a hot screen state, and further improves the display performance and stability of the display screen. Furthermore, by adjusting the current gain of the RGB colors of the pixel unit to compensate for the brightness and chromaticity of the display screen, the accuracy of the grayscale adjustment of the display screen can be maximized, the brightness and chromaticity of the pixel units of the display screen can be more accurately adjusted, and the display effect of the display screen can be further improved.

[0155] In some embodiments, the display screen compensation method may further include: adjusting a current parameter of a target pixel unit when the display screen is in a cold screen state until the brightness of the target pixel unit is adjusted to a first brightness, wherein the first brightness is determined based on a degree of brightness attenuation of the target pixel unit when the display screen is in a hot screen state.

[0156] Exemplarily, as shown in FIG10 , determining the first brightness may include the following steps:

[0157] Step 1010 : determining a first temperature deviation according to a first temperature of the display screen in a hot screen state and a second temperature of the display screen in a cold screen state.

[0158] The hot screen state can be a state in which the screen temperature of the display screen increases and does not change after the display screen is powered on. The first temperature is the temperature of the display screen in the hot screen state. The cold screen state can be a state when the display screen is powered off or when the display screen is just powered on. The second temperature is the temperature of the display screen in the cold screen state. That is, the second temperature can be the screen temperature of the display screen collected when the display screen is powered off or when the display screen is just powered on.

[0159] For example, the first temperature deviation can be calculated according to the following formula 9: ΔT=T hot -T cold (9)

[0160] Wherein, ΔT represents the first temperature deviation; T hot Indicates the first temperature of the display screen in the hot screen state; T cold Indicates the second temperature of the display in the cold screen state.

[0161] Step 1020 : Determine a first brightness according to the first temperature deviation, a target temperature compensation parameter corresponding to the target pixel unit, and a preset brightness corresponding to the target pixel unit.

[0162] The target temperature compensation parameter indicates the change in brightness and chromaticity of the target display area per unit temperature. The preset brightness can be the brightness of the pixel units in the display when the display is operating normally, that is, the brightness of the pixel units in the display when the display has not experienced brightness attenuation due to temperature increase.

[0163] Exemplarily, the first brightness can be calculated according to the following formula 10.

[0164] in, represents the first brightness; ΔT represents the first temperature deviation; [γ] represents the target temperature compensation parameter; Indicates preset brightness.

[0165] Exemplarily, when the target pixel unit includes a red sub-pixel unit, a green sub-pixel unit, and a blue sub-pixel unit, the preset brightness may include a brightness component corresponding to the red sub-pixel unit, a brightness component corresponding to the green sub-pixel unit, and a brightness component corresponding to the blue sub-pixel unit. Correspondingly, the first brightness may include an adjusted brightness component corresponding to the red sub-pixel unit, an adjusted brightness component corresponding to the green sub-pixel unit, and an adjusted brightness component corresponding to the blue sub-pixel unit.

[0166] In some embodiments, the method may further include: obtaining the current screen temperature of the display screen when the display screen is in a hot screen state; and adjusting the current parameters of the display screen according to the current screen temperature until the brightness of the display screen is adjusted to a second brightness and the color temperature of the display screen is adjusted to a target color temperature. In this way, by adjusting the brightness and color temperature of the display screen when the display screen is in a hot screen state, it is possible to ensure that the brightness, color, and color temperature of the display screen in the hot screen state meet the requirements.

[0167] In this embodiment, the above-mentioned step of obtaining the current temperature of the target display area may include: obtaining the current temperature of the target display area during the process of the display screen changing from a cold screen state to a hot screen state; adjusting the current current parameter of the target pixel unit to a first current parameter, including: adjusting the current current parameter of the target pixel unit to the first current parameter during the process of the display screen changing from a cold screen state to a hot screen state.

[0168] The step of obtaining the current temperature of the target display area may also include: obtaining the current temperature of the target display area when the display screen is in a hot screen state. Adjusting the current current parameter of the target pixel unit to the first current parameter may include: adjusting the current current parameter of the target pixel unit to the first current parameter when the display screen is in the hot screen state.

[0169] That is, after the display screen displays the target image, while the display screen is changing from a cold screen state to a hot screen state or while the display screen is in the hot screen state (i.e., after the display screen enters the hot screen state), the current temperature of the target display area is obtained, and based on the current temperature of the target display area, the current brightness and chromaticity compensation coefficient corresponding to the target display area is determined, and based on the current brightness and chromaticity compensation coefficient and the current current parameter of the target pixel unit, the first current parameter corresponding to the target pixel unit is determined, the target pixel unit being a pixel unit located in the target display area, so as to adjust the current current parameter of the target pixel unit to the first current parameter.

[0170] In this embodiment, the brightness of the display screen in the cold screen state is adjusted based on the brightness attenuation degree of the target pixel unit of the display screen in the hot screen state, which can avoid sacrificing the brightness of the display screen in the cold screen state, thereby reducing the brightness loss of the display screen in the cold screen state. In this way, while ensuring that the brightness chromaticity and color temperature of the display screen in the cold screen state can meet the requirements, the consistency of the brightness chromaticity and color temperature of the display screen in the cold screen state and the hot screen state is guaranteed, thereby improving the display performance and display stability of the display screen.

[0171] Furthermore, when the display screen is in a cold screen state, after the brightness of the target pixel unit is adjusted to the first brightness, during the process of the display screen changing from the cold screen state to the hot screen state or when the display screen is in the hot screen state, the current brightness and chromaticity compensation coefficient corresponding to the target display area is determined according to the current temperature of the target display area in the display screen, so as to compensate the brightness and chromaticity of each pixel unit in the target display area according to the current brightness and chromaticity compensation coefficient, thereby avoiding sacrificing the brightness of the green and blue sub-pixel units of the display screen in the hot screen state, reducing the brightness loss of the display screen in the hot screen state, so that the brightness and chromaticity and color temperature of the display screen in the hot screen state can meet the requirements, and further improving the display performance and display stability of the display screen.

[0172] In this embodiment, due to structural differences in different display areas of the display screen, the heat dissipation of the pixel units in different display areas varies. This uneven heat dissipation further causes different degrees of brightness and color attenuation in the pixel units in different display areas of the display screen, thereby causing the display uniformity of the display screen to deteriorate. Therefore, in this embodiment, after compensating for the brightness and color of the pixel units of the display screen, the uniformity of the pixel units of the display screen can also be compensated.

[0173] The following is a schematic illustration of the process of compensating for the uniformity of pixel units of a display screen.

[0174] In some embodiments, as shown in FIG11 , after step 340 , the display screen compensation method further includes:

[0175] Step 1110: Determine a current thermal compensation coefficient corresponding to the target display area based on the current temperature of the target display area, wherein the current thermal compensation coefficient is the thermal compensation coefficient of the target display area of ​​the display screen at the current moment.

[0176] In some examples, step 1110 may include: determining a second temperature deviation of the current temperature of the target display area relative to a preset temperature; determining a current thermal compensation coefficient based on the second temperature deviation, the first temperature deviation, and a correction parameter corresponding to the target pixel unit; wherein the first temperature deviation is used to reflect the temperature deviation between the first temperature of the display screen in a hot screen state and the second temperature of the display screen in a cold screen state.

[0177] The correction parameters corresponding to the target pixel unit can be expressed as a correction compensation parameter matrix (such as a 3*3 matrix).

[0178] For example, the current thermal compensation coefficient can be calculated according to the following formula 11. [β] k,i =([α]-1)·ΔT_LED k,i / (T hot -T cold)+1 (11)

[0179] Where [β] k,i represents the current thermal compensation coefficient of the i-th display area (target display area) at the k-th moment (i.e., the current moment); [α] represents the correction compensation parameter matrix corresponding to the target pixel unit; ΔT_LED k,i Indicates the second temperature deviation corresponding to the target display area; T hot Indicates the first temperature of the display screen in the hot screen state; T cold Indicates the second temperature of the display in the cold screen state.

[0180] The following takes the correction parameters corresponding to the target pixel unit as a correction compensation parameter matrix as an example to schematically illustrate the calibration process of the correction compensation parameter matrix.

[0181] In some examples, the correction compensation parameter matrix can be obtained through camera calibration methods.

[0182] Specifically, the calibration process of the correction compensation parameter matrix may include: obtaining first pixel information of the target pixel unit when the display screen is in a cold screen state; obtaining second pixel information of the target pixel unit when the display screen is in a hot screen state; and determining the correction parameters based on the first pixel information and the second pixel information.

[0183] The first pixel information is used to reflect the luminance information, chromaticity information, or brightness and chromaticity information of the target pixel unit in the cold screen state. Exemplarily, the first pixel information may be the spectral tristimulus values ​​of RGB of the target pixel unit in the cold screen state. The second pixel information is used to reflect the luminance information, chromaticity information, or brightness and chromaticity information of the target pixel unit in the hot screen state. Exemplarily, the second pixel information may be the spectral tristimulus values ​​of RGB of the target pixel unit in the hot screen state.

[0184] For example, taking compensation for brightness uniformity of a display screen as an example, the correction compensation parameter matrix can be calculated according to the following formula 12.

[0185] in, Represents the RGB principal components of the target pixel unit collected when the display screen is in the cold screen state (brightness information of the target pixel unit in the cold screen state); Represents the RGB principal components of the target pixel unit collected when the display screen is in the hot screen state (brightness information of the target pixel unit in the hot screen state); Represents the correction compensation parameter matrix in brightness mode.

[0186] For example, taking compensation for brightness and chromaticity uniformity of a display screen as an example, the correction compensation parameter matrix can be calculated according to the following formula 13.

[0187] in, Indicates the RGB tristimulus values ​​of the target pixel unit collected when the display is in the cold screen state (the brightness and chromaticity information of the target pixel unit in the cold screen state);

[0188] Represents the principal components of the tristimulus values ​​of the target pixel unit collected when the display screen is in the hot screen state (brightness and chromaticity information of the target pixel unit in the hot screen state); Represents the correction compensation parameter matrix in chroma mode (or luminance chroma mode).

[0189] It should be noted that each pixel unit in the display screen can have an independent correction compensation parameter matrix. In addition, the user can select the correction compensation parameter matrix in the brightness mode or the correction compensation parameter matrix in the brightness and chromaticity mode according to needs.

[0190] In some examples, the correction compensation parameter matrix can be obtained through a thermal imager calibration method.

[0191] Specifically, the calibration process of the correction compensation parameter matrix may include: when the display screen is in a cold screen state, obtaining a first pixel temperature of the target pixel unit; when the display screen is in a hot screen state, obtaining a second pixel temperature of the target pixel unit; determining a pixel temperature difference based on the first pixel temperature and the second pixel temperature; and determining a correction parameter based on the pixel temperature difference and a target temperature compensation parameter corresponding to the target pixel unit.

[0192] The first pixel temperature and the second pixel temperature can be acquired by a thermal imager.

[0193] For example, taking compensation for brightness and chromaticity uniformity of a display screen as an example, the correction compensation parameter matrix can be calculated according to the following formula 14.

[0194] Where d represents the pixel temperature difference; [γ] represents the target temperature compensation parameter; Represents the correction compensation parameter matrix in chroma mode (or luminance chroma mode).

[0195] For example, taking the compensation for the brightness uniformity of a display screen as an example, after obtaining the correction compensation parameter matrix in the brightness and chromaticity mode, the components of the non-main diagonal lines in the correction compensation parameter matrix in the brightness and chromaticity mode are set to 0, that is, the correction compensation parameter matrix in the brightness mode is obtained.

[0196] Among them, the correction compensation parameter matrix in brightness mode can be expressed as:

[0197] After step 1110 , step 1120 is executed to determine a second current parameter corresponding to the target pixel unit according to the current thermal compensation coefficient and the first current parameter.

[0198] Exemplarily, the second current parameter can be calculated according to the following formula 8.

[0199] in, represents the second current parameter corresponding to the target pixel unit; I R_out2 The red current parameter after thermal compensation; I G_out2 Indicates the green current parameter after thermal compensation; I B_out2 The blue color represents the current parameter after thermal compensation; represents the first current parameter corresponding to the target pixel unit; I R_out1 Represents the red current parameter after brightness and chromaticity compensation; I G_out1 Indicates the green current parameter after brightness and chromaticity compensation; I B_out1 Indicates the blue current parameter after brightness and chromaticity compensation; [β] k,i It represents the current thermal compensation coefficient of the i-th display area (target display area) at the k-th moment (i.e. the current moment).

[0200] Step 1130 : Adjust the current parameter of the target pixel unit to a second current parameter.

[0201] In this embodiment, the second current parameter may include a second current duty cycle and / or a second current amplitude. When the current parameter of the target pixel unit is the second current parameter, the uniformity of the display screen (ie, brightness uniformity and / or color uniformity) meets the requirements.

[0202] In some examples, when the current parameter of the target pixel unit is adjusted to the second current parameter, the current duty cycle of the target pixel unit can be adjusted so that the current duty cycle of the target pixel unit is the second current duty cycle. In other examples, when the current parameter of the target pixel unit is adjusted to the second current parameter, the current amplitude of the target pixel unit can also be adjusted so that the current amplitude of the target pixel unit is the second current amplitude. In some other examples, when the current parameter of the target pixel unit is adjusted to the second current parameter, the current duty cycle and the current amplitude of the target pixel unit can also be adjusted simultaneously, that is, the current parameter of the target pixel unit is adjusted by a mixed modulation method of PAM and PWM so that the current duty cycle of the target pixel unit is the second current amplitude, and the current amplitude of the target pixel unit is the second current amplitude.

[0203] In some examples, the display screen includes a second control; adjusting the current parameter of the target pixel unit to the second current parameter includes: receiving a second operation of the user on the second control; and adjusting the current parameter of the target pixel unit to the second current parameter in response to the second operation.

[0204] Among them, the second control can be, for example, an adjustment lever, and the adjustment range of the adjustment lever can indicate the current operating range of the display screen. The second operation can be an operation for the user to adjust the lever value of the adjustment lever, and different lever values ​​correspond to different current parameters. In a specific implementation, when the display screen has a poor display uniformity due to a high screen temperature, the user can adjust the lever value of the adjustment lever to adjust the current parameter of each pixel unit in the display screen to the current parameter corresponding to the lever value, thereby compensating for the uniformity of the display screen and improving the display effect of the display screen. This method is easy to operate and provides a better user experience.

[0205] In an embodiment of the present application, after compensating for the brightness and chromaticity of the display screen, the current thermal compensation coefficient corresponding to the target display area can be determined based on the current temperature of the target display area in the display screen, and the second current parameter of the target pixel unit can be determined based on the current thermal compensation coefficient and the first current parameter of the target pixel unit to adjust the current parameter of the target pixel unit to the second current parameter. In this way, the uniformity of each pixel unit in the target display area of ​​the display screen can be compensated, and the problem of different degrees of brightness and chromaticity attenuation of the display screen due to uneven heat dissipation in different display areas, which in turn causes the uniformity of the display screen to deteriorate, can be avoided. The display uniformity of the display screen can be improved, and the display performance and display stability of the display screen can be further improved. Furthermore, by adjusting the current gain of the RGB three colors of the pixel unit to compensate for the uniformity of the display screen, the accuracy of the grayscale adjustment of the display screen can be maximized, the brightness and chromaticity of the pixel unit of the display screen can be adjusted more accurately, and the display effect of the display screen can be further improved.

[0206] In summary, in the embodiments of the present application, when the content displayed on the display screen is different, the consistency of the overall peak brightness and color temperature of the display screen can be guaranteed; when the ambient temperature of the environment in which the display screen is located is different and the power consumption and heat dissipation conditions of different display areas of the display screen are different, the consistency of the overall peak brightness and color temperature of the display screen can also be guaranteed.

[0207] Corresponding to the compensation method of the display screen in the above embodiment, FIG12 shows a structural block diagram of the compensation device of the display screen provided in the embodiment of the present application. For the sake of convenience, only the part related to the embodiment of the present application is shown.

[0208] Please refer to Figure 12. The compensation device 1200 of the display screen may include a first acquisition module 1201, a first determination module 1202, a second determination module 1203 and a control module 1204. Among them, the first acquisition module 1201 is used to obtain the current temperature of the target display area when the display screen displays the target image. The target display area is any display area among the multiple display areas included in the display screen. The first determination module 1202 is used to determine the current brightness and chromaticity compensation coefficient corresponding to the target display area based on the current temperature of the target display area. The second determination module 1203 is used to determine the first current parameter corresponding to the target pixel unit based on the current brightness and chromaticity compensation coefficient and the current current parameter of the target pixel unit. The target pixel unit is a pixel unit located in the target display area. The control module 1204 is used to adjust the current current parameter of the target pixel unit to the first current parameter.

[0209] In some embodiments, the control module 1204 is further used to adjust the current parameters of the target pixel unit when the display screen is in a cold screen state until the brightness of the target pixel unit is adjusted to a first brightness; wherein the first brightness is determined based on the degree of brightness attenuation of the target pixel unit when the display screen is in a hot screen state.

[0210] In some embodiments, the display screen compensation device 1200 may further include: a third determination module configured to determine a first temperature deviation based on a first temperature of the display screen in a hot screen state and a second temperature of the display screen in a cold screen state; and a fourth determination module configured to determine a first brightness based on the first temperature deviation, a target temperature compensation parameter corresponding to the target pixel unit, and a preset brightness corresponding to the target pixel unit, wherein the target temperature compensation parameter indicates a change in brightness and chromaticity information of the target display area per unit temperature.

[0211] In some embodiments, the first acquisition module 1201 is specifically used to: acquire the current temperature of the target display area when the display screen changes from a cold screen state to a hot screen state; or acquire the current temperature of the target display area when the display screen is in a hot screen state.

[0212] In some embodiments, the first acquisition module 1201 is further used to obtain the current screen temperature of the display screen when the display screen is in a hot screen state; the control module 1204 is further used to adjust the current parameters of the display screen according to the current screen temperature until the brightness of the display screen is adjusted to the second brightness and the color temperature of the display screen is adjusted to the target color temperature.

[0213] In some embodiments, the target display area includes a target pixel unit; or, the target display area is a display area corresponding to a target display module, the target display module includes multiple pixel units, and the multiple pixel units include the target pixel unit; or, the target display area is a display area corresponding to a target sub-display screen, the target sub-display screen includes multiple display modules, and one of the multiple display modules includes the target pixel unit.

[0214] In some embodiments, the target pixel unit includes a red sub-pixel unit, a green sub-pixel unit and a blue sub-pixel unit, and the current current parameters include a red current parameter corresponding to the red sub-pixel unit, a green current parameter corresponding to the green sub-pixel unit and a blue current parameter corresponding to the blue sub-pixel unit; the second determination module 1203 is specifically used to: determine the compensated red current parameter based on the current brightness and chromaticity compensation coefficient and the red current parameter; determine the compensated green current parameter based on the current brightness and chromaticity compensation coefficient and the green current parameter; determine the compensated blue current parameter based on the current brightness and chromaticity compensation coefficient and the blue current parameter.

[0215] In some embodiments, the control module 1204 includes a receiving unit and a control unit, wherein the receiving unit is used to receive a first operation of the user on the first control; the control unit is used to adjust the current parameter of the target pixel unit to the first current parameter in response to the first operation.

[0216] In some embodiments, the first determination module 1202 is specifically used to: determine a second temperature deviation of the current temperature of the target display area relative to the preset temperature; obtain a target temperature compensation parameter corresponding to the target display area; and determine a current brightness and chromaticity compensation coefficient based on the second temperature deviation and the target temperature compensation parameter.

[0217] In some embodiments, the compensation device 1200 for the display screen may further include: a second acquisition module, used to acquire a sample brightness and chromaticity set and a sample temperature set corresponding to the target display area during the process of the display screen changing from a cold screen state to a hot screen state, the sample brightness and chromaticity set including multiple sample brightness and chromaticity information, the sample temperature set including multiple sample temperatures, and the multiple sample brightness and chromaticity information corresponding one-to-one to the multiple sample temperatures; a fitting module, used to perform linear fitting on the multiple sample brightness and chromaticity information and the multiple sample temperatures to obtain a slope parameter, the slope parameter being used to indicate the relationship between the brightness and chromaticity information of the target display area and the temperature; a fifth determination module, used to determine the target temperature compensation parameter based on the slope parameter and the brightness and chromaticity change information corresponding to the target display area, wherein the brightness and chromaticity change information indicates the change between the brightness and chromaticity information of the target display area in the hot screen state and the brightness and chromaticity information of the target display area in the cold screen state.

[0218] In some embodiments, the display screen includes multiple display areas, and the first acquisition module 1201 is specifically used to: when the display screen displays a target image, obtain a first reference image of the display screen including the display screen, and determine the current grayscale information corresponding to each display area among the multiple display areas based on the first reference image; determine the current heating power corresponding to each display area based on the current grayscale information corresponding to each display area; determine the current temperature corresponding to each display area based on a temperature prediction model, the current ambient temperature information of the environment in which the display screen is located, and the current heating power corresponding to each display area, wherein the temperature prediction model is used to reflect the temperature rise value of the first display area caused by the power consumption of the second display area when the display screen displays the target image, the first display area is any display area among the multiple display areas, and the second display area includes the display areas other than the first display area in the multiple display areas.

[0219] In some embodiments, multiple temperature sensors are set in the environment where the display screen is located, and the multiple temperature sensors are distributed along the height direction of the display screen; the current ambient temperature information includes multiple ambient temperatures; the compensation device 1200 of the display screen can also include: a third acquisition module for collecting multiple ambient temperatures through multiple temperature sensors.

[0220] In some embodiments, a first temperature sensor and a second temperature sensor are provided in the environment in which the display screen is located, and the first temperature sensor and the second temperature sensor are distributed along the height direction of the display screen; the current ambient temperature information includes multiple ambient temperatures; the third acquisition module is also used to: collect the first ambient temperature through the first temperature sensor, and collect the second ambient temperature through the second temperature sensor; determine the ambient temperature deviation between the first ambient temperature and the second ambient temperature; based on the ambient temperature deviation, upsample the first ambient temperature and the second ambient temperature to obtain multiple ambient temperatures.

[0221] In some embodiments, the temperature prediction model is a thermal resistance matrix, and the compensation device 1200 of the display screen may further include: a fourth acquisition module, used to acquire a second reference image including the display screen of the display screen when the display screen displays a test image, and determine the test grayscale information corresponding to each test area in the multiple test areas based on the second reference image; the multiple test areas include part of the display areas in the multiple display areas; a sixth determination module, used to determine the test heating power corresponding to each test area based on the test grayscale information corresponding to each test area; a fifth acquisition module, used to acquire the test ambient temperature of the environment in which the display screen is located and the test temperature corresponding to each test area; a seventh determination module, used to determine the reference thermal resistance matrix based on the test ambient temperature, the test temperature corresponding to each test area and the test heating power corresponding to each test area; and a sixth acquisition module, used to upsample the reference thermal resistance matrix to obtain the thermal resistance matrix.

[0222] In some embodiments, a third temperature sensor is provided corresponding to the target display area, and the first acquisition module 1201 is specifically configured to acquire the current temperature of the target display area through the third temperature sensor.

[0223] In some embodiments, the display screen compensation device 1200 may further include a denoising module configured to process the current temperature of the target display area based on the temperature, time parameters, and spatial parameters of the target display area during a preset time period to obtain a processed current temperature corresponding to the target display area. The first determination module 1202 is specifically configured to determine a current brightness and chromaticity compensation coefficient based on the processed current temperature.

[0224] In some embodiments, the compensation device 1200 of the display screen may further include: an eighth determination module for determining a current thermal compensation coefficient corresponding to the target display area based on the current temperature of the target display area; a ninth determination module for determining a second current parameter corresponding to the target pixel unit based on the current thermal compensation coefficient and the first current parameter; and the control module 1204 is further used to adjust the current parameter of the target pixel unit to the second current parameter.

[0225] In some embodiments, the receiving unit is further configured to receive a second operation of the user on the second control; and the control unit is further configured to adjust the current parameter of the target pixel unit to a second current parameter in response to the second operation.

[0226] In some embodiments, the eighth determination module is specifically used to: determine a second temperature deviation of the current temperature of the target display area relative to a preset temperature; determine a current thermal compensation coefficient based on the second temperature deviation, the first temperature deviation and the correction parameter corresponding to the target pixel unit; wherein the first temperature deviation is used to reflect the temperature deviation between the first temperature of the display screen in a hot screen state and the second temperature of the display screen in a cold screen state.

[0227] In some embodiments, the display screen compensation device 1200 may further include: a seventh acquisition module configured to acquire first pixel information of a target pixel unit when the display screen is in a cold screen state, the first pixel information being configured to reflect the luminance information, chromaticity information, or brightness and chromaticity information of the target pixel unit in the cold screen state. An eighth acquisition module configured to acquire second pixel information of the target pixel unit when the display screen is in a hot screen state, the second pixel information being configured to reflect the luminance information, chromaticity information, or brightness and chromaticity information of the target pixel unit in the hot screen state. A tenth determination module configured to determine correction parameters based on the first pixel information and the second pixel information.

[0228] In some embodiments, the compensation device 1200 for the display screen may further include: a ninth acquisition module for acquiring a first pixel temperature of the target pixel unit when the display screen is in a cold screen state; a tenth acquisition module for acquiring a second pixel temperature of the target pixel unit when the display screen is in a hot screen state; an eleventh determination module for determining a pixel temperature difference based on the first pixel temperature and the second pixel temperature; and a twelfth determination module for determining a correction parameter based on the pixel temperature difference and a target temperature compensation parameter corresponding to the target pixel unit.

[0229] It should be noted that the information interaction, execution process, etc. between the above-mentioned devices / units are based on the same concept as the method embodiment of this application. Their specific functions and technical effects can be found in the method embodiment section and will not be repeated here.

[0230] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In actual applications, the above-mentioned functions can be distributed and completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0231] An embodiment of the present application also provides a display control device, which includes: at least one processor, a memory, and a computer program stored in the memory and executable on the at least one processor, wherein the processor implements the steps of any of the above-mentioned method embodiments when executing the computer program.

[0232] An embodiment of the present application further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps in the above-mentioned various method embodiments can be implemented.

[0233] An embodiment of the present application provides a computer program product. When the computer program product is run on a display control device, the display control device can implement the steps in the above-mentioned various method embodiments when the computer program product is executed.

[0234] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present application implements all or part of the processes in the above-mentioned embodiment method, which can be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program, when executed by the processor, can implement the steps of the above-mentioned various method embodiments. Wherein, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may at least include: any entity or device capable of carrying the computer program code to the display control device, a recording medium, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electric carrier signal, a telecommunication signal and a software distribution medium. For example, a USB flash drive, a mobile hard disk, a magnetic disk or an optical disk. In some jurisdictions, according to legislation and patent practice, computer-readable media cannot be electric carrier signals and telecommunication signals.

[0235] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

[0236] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0237] In the embodiments provided in the present application, it should be understood that the disclosed display control device and method can be implemented in other ways. For example, the display control device embodiments described above are merely schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0238] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0239] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A compensation method for a display screen, characterized in that: The method comprises: When the display screen displays a target image, obtaining a current temperature of a target display area, wherein the target display area is any one of a plurality of display areas included in the display screen; Determining a current brightness and chromaticity compensation coefficient corresponding to the target display area according to the current temperature of the target display area; Determining a first current parameter corresponding to the target pixel unit according to the current brightness and chromaticity compensation coefficient and the current current parameter of the target pixel unit, wherein the target pixel unit is a pixel unit located in the target display area; The current parameter of the target pixel unit is adjusted to the first current parameter.

2. The method according to claim 1, characterized in that The method further comprises: When the display screen is in a cold screen state, adjusting the current parameter of the target pixel unit until the brightness of the target pixel unit is adjusted to a first brightness; The first brightness is determined according to the brightness attenuation degree of the target pixel unit when the display screen is in a hot screen state.

3. The method according to claim 2, characterized in that The current parameter of the target pixel unit is adjusted until the brightness of the target pixel unit is adjusted to the first brightness, and the method further includes: determining a first temperature deviation according to a first temperature of the display screen in the hot screen state and a second temperature of the display screen in the cold screen state; The first brightness is determined according to the first temperature deviation, the target temperature compensation parameter corresponding to the target pixel unit and the preset brightness corresponding to the target pixel unit, wherein the target temperature compensation parameter is used to indicate the change in brightness and chromaticity information of the target display area at a unit temperature.

4. The method according to claim 2, characterized in that: The obtaining the current temperature of the target display area includes: obtaining the current temperature of the target display area during the process in which the display screen changes from the cold screen state to the hot screen state; Alternatively, when the display screen is in the hot screen state, the current temperature of the target display area is acquired.

5. The method according to claim 1, characterized in that The method further comprises: When the display screen is in the hot screen state, obtaining a current screen temperature of the display screen; According to the current screen temperature, the current parameters of the display screen are adjusted until the brightness of the display screen is adjusted to a second brightness and the color temperature of the display screen is adjusted to a target color temperature.

6. The method according to claim 1, characterized in that The target display area includes the target pixel unit; or, The target display area is a display area corresponding to a target display module, the target display module includes a plurality of pixel units, and the plurality of pixel units include the target pixel unit; or, The target display area is a display area corresponding to a target sub-display screen. The target sub-display screen includes a plurality of display modules, and one display module among the plurality of display modules includes the target pixel unit.

7. The method according to claim 1, characterized in that The target pixel unit includes a red sub-pixel unit, a green sub-pixel unit and a blue sub-pixel unit, and the current current parameter includes a red current parameter corresponding to the red sub-pixel unit, a green current parameter corresponding to the green sub-pixel unit and a blue current parameter corresponding to the blue sub-pixel unit; The determining, according to the current brightness and chromaticity compensation coefficient and the current current parameter of the target pixel unit, a first current parameter corresponding to the target pixel unit includes: Determining a compensated red current parameter according to the current brightness and chromaticity compensation coefficient and the red current parameter; Determining a compensated green current parameter according to the current brightness and chromaticity compensation coefficient and the green current parameter; The compensated blue current parameter is determined according to the current brightness and chromaticity compensation coefficient and the blue current parameter.

8. The method according to claim 1, characterized in that The display screen includes a first control; and adjusting the current current parameter of the target pixel unit to the first current parameter includes: Receiving a first operation of the user on the first control; In response to the first operation, a current parameter of the target pixel unit is adjusted to the first current parameter.

9. The method according to any one of claims 1 to 8, characterized in that The determining, according to the current temperature of the target display area, a current brightness and chromaticity compensation coefficient corresponding to the target display area includes: Determine a second temperature deviation of the current temperature of the target display area relative to a preset temperature; Obtaining a target temperature compensation parameter corresponding to the target display area; The current brightness and chromaticity compensation coefficient is determined according to the second temperature deviation and the target temperature compensation parameter.

10. The method according to claim 9, characterized in that The method further comprises: In the process of the display screen changing from a cold screen state to a hot screen state, obtaining a sample brightness and chromaticity set and a sample temperature set corresponding to the target display area, wherein the sample brightness and chromaticity set includes a plurality of sample brightness and chromaticity information, and the sample temperature set includes a plurality of sample temperatures, and the plurality of sample brightness and chromaticity information corresponds to the plurality of sample temperatures one by one; Performing linear fitting on the plurality of sample brightness and chromaticity information and the plurality of sample temperatures to obtain a slope parameter, wherein the slope parameter is used to indicate a relationship between the brightness and chromaticity information of the target display area and the temperature; The target temperature compensation parameter is determined according to the slope parameter and the brightness and chromaticity change information corresponding to the target display area, wherein the brightness and chromaticity change information indicates the change between the brightness and chromaticity information of the target display area in the hot screen state and the brightness and chromaticity information of the target display area in the cold screen state.

11. The method according to any one of claims 1 to 8, characterized in that The display screen includes a plurality of display areas, and obtaining the current temperature of the target display area includes: In the case where the display screen displays the target image, acquiring a first reference image including a display screen of the display screen, and determining current grayscale information corresponding to each of the multiple display areas according to the first reference image; Determining the current heating power corresponding to each of the display areas according to the current grayscale information corresponding to each of the display areas; The current temperature corresponding to each of the display areas is determined according to a temperature prediction model, current ambient temperature information of the environment in which the display screen is located, and current heating power corresponding to each of the display areas, wherein the temperature prediction model is used to reflect the temperature rise value generated by the first display area due to the power consumption of the second display area when the display screen displays the target image, the first display area is any display area among the multiple display areas, and the second display area includes the display areas other than the first display area among the multiple display areas.

12. The method according to claim 11, characterized in that A plurality of temperature sensors are arranged in the environment where the display screen is located, and the plurality of temperature sensors are distributed along the height direction of the display screen; the current ambient temperature information includes a plurality of ambient temperatures; and the method further includes: The multiple ambient temperatures are collected by the multiple temperature sensors.

13. The method according to claim 11, characterized in that A first temperature sensor and a second temperature sensor are provided in the environment where the display screen is located, and the first temperature sensor and the second temperature sensor are distributed along the height direction of the display screen; the current ambient temperature information includes multiple ambient temperatures; and the method further includes: Collecting a first ambient temperature through the first temperature sensor, and collecting a second ambient temperature through the second temperature sensor; determining an ambient temperature deviation between the first ambient temperature and the second ambient temperature; Based on the ambient temperature deviation, up-sampling is performed on the first ambient temperature and the second ambient temperature to obtain the multiple ambient temperatures.

14. The method according to claim 11, characterized in that The temperature prediction model is a thermal resistance matrix, and the method further includes: In the case where the display screen displays a test image, a second reference image including a display screen of the display screen is acquired, and test grayscale information corresponding to each of a plurality of test areas is determined according to the second reference image; the plurality of test areas include a portion of the plurality of display areas; Determining the test heating power corresponding to each of the test areas according to the test grayscale information corresponding to each of the test areas; Obtaining the test environment temperature of the environment in which the display screen is located and the test temperature corresponding to each of the test areas; Determine a reference thermal resistance matrix according to the test environment temperature, the test temperature corresponding to each of the test areas, and the test heating power corresponding to each of the test areas; The reference thermal resistance matrix is ​​upsampled to obtain the thermal resistance matrix.

15. The method according to any one of claims 1 to 8, characterized in that The target display area is correspondingly provided with a third temperature sensor, and the obtaining of the current temperature of the target display area includes: The current temperature of the target display area is acquired through the third temperature sensor.

16. The method according to any one of claims 1 to 8, characterized in that After obtaining the current temperature of the target display area, the method further includes: Based on the temperature, time parameters and space parameters of the target display area in a preset time period, the current temperature of the target display area is processed to obtain the processed current temperature corresponding to the target display area; The determining, according to the current temperature of the target display area, a current brightness and chromaticity compensation coefficient corresponding to the target display area includes: The current brightness and chromaticity compensation coefficient is determined according to the processed current temperature.

17. The method according to any one of claims 1 to 8, characterized in that After adjusting the current current parameter of the target pixel unit to the first current parameter, the method further includes: Determining a current thermal compensation coefficient corresponding to the target display area according to the current temperature of the target display area; Determining a second current parameter corresponding to the target pixel unit according to the current thermal compensation coefficient and the first current parameter; The current parameter of the target pixel unit is adjusted to the second current parameter.

18. The method according to claim 17, characterized in that The display screen includes a second control; and adjusting the current parameter of the target pixel unit to the second current parameter includes: receiving a second operation of the user on the second control; In response to the second operation, the current parameter of the target pixel unit is adjusted to the second current parameter.

19. The method according to claim 17, characterized in that The determining, according to the current temperature of the target display area, a current thermal compensation coefficient corresponding to the target pixel unit includes: Determine a second temperature deviation of the current temperature of the target display area relative to a preset temperature; The current thermal compensation coefficient is determined according to the second temperature deviation, the first temperature deviation and the correction parameter corresponding to the target pixel unit; wherein the first temperature deviation is used to reflect the temperature deviation between the first temperature of the display screen in the hot screen state and the second temperature of the display screen in the cold screen state.

20. The method according to claim 19, characterized in that The method further comprises: When the display screen is in a cold screen state, acquiring first pixel information of the target pixel unit, where the first pixel information is used to reflect brightness information or chromaticity information or bright chromaticity information of the target pixel unit in the cold screen state; When the display screen is in a hot screen state, obtaining second pixel information of the target pixel unit, where the second pixel information is used to reflect brightness information or chromaticity information or bright chromaticity information of the target pixel unit in the hot screen state; The correction parameter is determined according to the first pixel information and the second pixel information.

21. The method according to claim 19, characterized in that The method further comprises: When the display screen is in a cold screen state, acquiring a first pixel temperature of the target pixel unit; When the display screen is in a hot screen state, acquiring a second pixel temperature of the target pixel unit; determining a pixel temperature difference according to the first pixel temperature and the second pixel temperature; The correction parameter is determined according to the pixel temperature difference and a target temperature compensation parameter corresponding to the target pixel unit.

22. A compensation device for a display screen, characterized in that: include: A first acquisition module, configured to acquire a current temperature of a target display area when a target image is displayed on the display screen, wherein the target display area is any one of a plurality of display areas included in the display screen; A first determination module, configured to determine a current brightness and chromaticity compensation coefficient corresponding to the target display area according to a current temperature of the target display area; A second determination module, configured to determine a first current parameter corresponding to a target pixel unit according to the current brightness and chromaticity compensation coefficient and a current current parameter of the target pixel unit, wherein the target pixel unit is a pixel unit located in the target display area; A control module is used to adjust the current parameter of the target pixel unit to the first current parameter.

23. A display control device, characterized in that: include: Processors, memory, and interfaces; The processor, the memory and the interface cooperate with each other so that the display control device executes the compensation method for a display screen as described in any one of claims 1 to 21.

24. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes instructions, and when the instructions are executed on a display control device, the display control device executes the display screen compensation method according to any one of claims 1 to 21.

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