Thermal compensation correction method, system, terminal device and display screen control device

Abstract

The application is suitable for the technical field of display screen, and provides a thermal compensation correction method, system, terminal device and display screen control device. The thermal compensation correction method specifically comprises: obtaining a cold screen lamp point image of a target display area of a display screen in a cold screen state, wherein the target display area is part or all of the display area of the display screen, and imaging of at least part of lamp points in the cold screen lamp point image is in a sticking state; obtaining a hot screen lamp point image of the target display area in a hot screen state, wherein imaging of at least part of lamp points in the hot screen lamp point image is in a sticking state; obtaining a thermal compensation coefficient according to the cold screen lamp point image and the hot screen lamp point image, wherein the thermal compensation coefficient is used for data conversion of the cold screen state and the hot screen state. The embodiment of the application can improve the accuracy of thermal compensation correction.

Description

Technical Field

[0001] This application belongs to the field of display screen technology, and in particular relates to a thermal compensation correction method, system, terminal equipment, and display screen control equipment. Background Technology

[0002] With the development of LED display technology, LED displays have been applied to various fields due to their advantages such as low cost, low power consumption, high visibility, and flexible assembly. As LED displays become more widespread, people's requirements for them are increasing. Since temperature changes can cause color differences in LED displays, thermal compensation calibration has become particularly important. Thermal compensation calibration requires data acquisition under both hot and cold screen conditions. However, during the data acquisition process, the screen temperature fluctuates drastically, making it difficult to meet the data requirements for thermal compensation calibration, thus reducing its accuracy. Summary of the Invention

[0003] This application provides a thermal compensation correction method, system, terminal device, and display screen control device, which can improve the accuracy of thermal compensation correction.

[0004] The first aspect of this application provides a thermal compensation correction method, comprising: controlling a target display area of ​​a display screen to illuminate point by point in a cold screen state, wherein the target display area is part or all of the display area of ​​the display screen; adjusting the acquisition parameters of an acquisition device so that the images of at least some of the lamp points in the target display area are in a sticky state; after the acquisition parameters are adjusted, controlling the acquisition device to capture an image of the target display area to obtain a cold screen lamp point image of the target display area, wherein the images of at least some of the lamp points in the cold screen lamp point image are in a sticky state; when the target display area reaches a hot screen state, controlling the acquisition device to capture an image of the target display area to obtain a hot screen lamp point image of the target display area, wherein the images of at least some of the lamp points in the hot screen lamp point image are in a sticky state; and obtaining a thermal compensation coefficient based on the cold screen lamp point image and the hot screen lamp point image, wherein the thermal compensation coefficient is used to perform data conversion between the cold screen state and the hot screen state.

[0005] A thermal compensation correction system provided in the second aspect of this application includes: a display screen control device for controlling a target display area of ​​the display screen to illuminate point by point in a cold screen state, wherein the target display area is part or all of the display area of ​​the display screen; an acquisition device for acquiring images of the target display area, wherein at least some of the light points in the target display area acquired by the acquisition device are in a stuck state, and for taking pictures of the target display area to obtain a cold screen light point image of the target display area, wherein at least some of the light points in the cold screen light point image are in a stuck state; and for controlling the acquisition device to take pictures of the target display area when the target display area reaches a hot screen state to obtain a hot screen light point image of the target display area, wherein at least some of the light points in the hot screen light point image are in a stuck state; and a thermal compensation correction unit for obtaining a thermal compensation coefficient based on the cold screen light point image and the hot screen light point image, wherein the thermal compensation coefficient is used to perform data conversion between the cold screen state and the hot screen state.

[0006] A third aspect of this application provides a thermal compensation correction method, comprising: acquiring a cold screen dot image of a target display area of ​​a display screen illuminated point by point in a cold screen state, wherein the target display area is part or all of the display area of ​​the display screen, and at least some dots in the cold screen dot image are in a stuck state; acquiring a hot screen dot image of the target display area illuminated point by point in a hot screen state, wherein at least some dots in the hot screen dot image are in a stuck state; and obtaining a thermal compensation coefficient based on the cold screen dot image and the hot screen dot image, wherein the thermal compensation coefficient is used to perform data conversion between the cold screen state and the hot screen state.

[0007] A fourth aspect of this application provides a thermal compensation correction device, including a module for performing the thermal compensation correction method described in the third aspect.

[0008] A fifth aspect of this application provides a terminal device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the above-described thermal compensation correction method.

[0009] A sixth aspect of this application provides a display screen control device, including a memory for storing thermal compensation coefficients obtained according to the thermal compensation correction method described in the first or third aspect; and a processor for performing thermal compensation correction on the display screen according to the thermal compensation coefficients.

[0010] A seventh aspect of this application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the above-described thermal compensation correction method.

[0011] The eighth aspect of this application provides a computer program product that, when run on a terminal device, causes the terminal device to execute the above-described thermal compensation correction method.

[0012] In the embodiments of this application, by lighting up the target display area point by point in a cold screen state to collect the cold screen light point image of the target display area, and correspondingly collecting the hot screen light point image of the target display area in a hot screen state, the data collection of the entire target display area in either a cold screen state or a hot screen state can be completed at once. This avoids the problem of drastic changes in screen temperature caused by the intermittent point collection method, and makes the thermal compensation coefficient obtained from the cold screen light point image and the hot screen light point image more accurate. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the implementation process of a thermal compensation correction method provided in an embodiment of this application. Figure 1 ; Figure 2 This is a schematic diagram of the thermal compensation and correction system provided in the embodiments of this application; Figure 3A This is an example diagram of the light spot pattern provided by the relevant technology; Figure 3B This is an example diagram of the light dot pattern provided in the embodiments of this application; Figure 4 This is a schematic diagram illustrating the specific process for determining the thermal compensation coefficient provided in the embodiments of this application; Figure 5 This is a schematic diagram illustrating the specific process for determining cold screen optical data and hot screen optical data provided in the embodiments of this application; Figure 6 This is a schematic diagram illustrating the specific process of thermal compensation correction provided in the embodiments of this application; Figure 7 This is a schematic diagram of the implementation process of a thermal compensation correction method provided in an embodiment of this application. Figure 2 ; Figure 8This is a schematic diagram of the structure of a thermal compensation and correction device provided in an embodiment of this application; Figure 9 This is a schematic diagram of the structure of the terminal device provided in the embodiments of this application. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are protected by this application.

[0016] An LED display screen can contain pixels, and each pixel can include one or more light points (or pixel lamps). For example, one pixel of an LED display screen can include three light points: red, green, and blue; or, one pixel of an LED display screen can include four light points: red, green, green, and blue. The evaluation / calibration of an LED display screen can sometimes be understood as the evaluation / calibration of the light points within the LED display screen (such as the evaluation / calibration of the brightness, color, etc. of the light points).

[0017] This application does not specifically limit the size of the LED display screen. For example, the LED display screen can be large in size, such as an LED display screen used in shopping malls or concerts. The LED display screen can be composed of many splicing units. These splicing units are sometimes called light boxes (such as LED light boxes). For LED display screens with light boxes as the basic unit, the LED display screen mentioned in this application can refer to an LED display screen corresponding to a single light box, or it can refer to an LED display screen composed of multiple light boxes spliced ​​together. The LED display screen mentioned in this application can also be a smaller-sized display screen, such as a light box or a light panel. With the future development of displays, smaller-sized LED display screens are likely to contain a larger number of pixels, and the methods provided in this application will also be applicable.

[0018] To facilitate understanding of this application, it will be described in more detail below based on exemplary embodiments and in conjunction with the accompanying drawings. The same or similar reference numerals are used in the drawings to denote the same or similar modules. It should be understood that the drawings are merely illustrative, and the scope of protection of this application is not limited thereto.

[0019] The thermal compensation correction methods provided by related technologies often employ an intermittent sampling approach when acquiring LED images under cold and hot screen conditions. Each LED in the display generates heat when lit, causing the screen temperature to gradually rise. However, intermittent sampling only illuminates a portion of the LEDs; therefore, the heat generated by these illuminated LEDs is less than the heat generated when all LEDs are lit, resulting in an unstable thermal stability. Furthermore, intermittent sampling requires multiple sessions, with each session involving a different illuminated LED. Changing the illuminated LEDs involves cooling due to LED turning off and heating due to LED turning on. Therefore, the screen temperature may differ each time cold and hot screen images are acquired. For these reasons, the cold and hot screen images obtained by these technologies contain errors compared to the actual conditions under cold and hot screen conditions, leading to lower accuracy in thermal compensation correction.

[0020] To address the aforementioned issues, this application employs a point-by-point lighting method for data acquisition and provides a corresponding thermal compensation and correction method.

[0021] Please refer to Figure 1 , Figure 1 This paper illustrates a flowchart of a thermal compensation correction method according to this application. This thermal compensation correction method can be applied to… Figure 2 The thermal compensation and correction system 20 shown.

[0022] Please refer to Figure 2The thermal compensation and correction system 20 shown may include a display screen control device 21, a data acquisition device 22, and a thermal compensation and correction unit 23. The display screen control device 21 controls the display screen 24 to turn on or off the individual LEDs within the display screen 24. This display screen control device 21 can refer to a sending card, a receiving card, or a TCON chip. In other embodiments, it may refer to a combination of a sending card and a receiving card, or a combination of a sending card or a receiving card with other processing chips / processing circuits. The display screen control device 21 can transmit information or instructions to the display screen 24, causing the display screen 24 to light up or turn off some or all of the LEDs according to the desired pattern. The data acquisition device 22 is used to acquire images of the LEDs within the display screen 24 and may be a high-definition camera, an optical camera, or an industrial camera, etc. The thermal compensation correction unit 23 can be used to determine the thermal compensation coefficient. The determined thermal compensation coefficient can be used to perform thermal compensation correction on the display screen 24 to compensate for the color difference changes in the display screen 24 caused by temperature changes. The thermal compensation correction unit 23 can be a computer (such as a desktop or laptop computer), a mobile terminal (such as a mobile phone or tablet computer), or other smart devices. The thermal compensation correction unit 23 can be equipped with a software system to implement the thermal compensation correction function.

[0023] It should be noted that the display screen 24 may or may not be part of the thermal compensation and correction system 20. Furthermore, this application embodiment does not specifically limit the type of display screen. In some embodiments, the display screen may be an LCD display screen, an LED display screen, or an OLED display screen. Taking an LED display screen as an example, the LED display screen may be a conventional LED display screen, or it may be a microLED, miniLED, or a new type of LED in the future. Moreover, the display screen can be packaged using SMD, COB, COG, or future novel packaging methods.

[0024] Specifically, the above-mentioned thermal compensation correction method may include steps S101 to S105.

[0025] Step S101: Control the target display area of ​​the display screen to light up point by point in the cold screen state.

[0026] In the embodiments of this application, the target display area of ​​the display screen can refer to a portion of the display area or the entire display area. It is understood that the target display area is typically a rectangular area. However, this application embodiment does not exclude the possibility of using a non-rectangular area as the target display area. The display screen control device 21 can control the target display area of ​​the display screen to light up point by point in a cold screen state. The cold screen state refers to the state where the lamps in the target display area do not generate a thermal effect, for example, the state when the target display area is first powered on. When the target display area is in a cold screen state, since the individual lamps in the target display area do not generate a thermal effect, the overall temperature of the target display area is approximately the same as the ambient temperature.

[0027] Point-by-point illumination, or non-interval illumination, refers to controlling all or part of the LEDs of a specific color within a target display area to be illuminated. Specifically, the target display area can be composed of pixels, and each pixel can include one or more LEDs (or pixel lights). Taking an LED display screen as an example, one pixel can include three LEDs: red, green, and blue; or, four LEDs: red, green, green, and blue. It should be understood that in other embodiments, a pixel can also consist of LEDs of more colors, and this application does not limit this. Correspondingly, point-by-point illumination can mean simultaneously illuminating all red LEDs within the target display area, simultaneously illuminating all blue LEDs within the target display area, simultaneously illuminating all green LEDs within the target display area, simultaneously illuminating red and blue LEDs within the target display area, simultaneously illuminating red, blue, and green LEDs within the target display area, and so on.

[0028] To ensure the target display area is in a cold screen state, before each pixel is turned on, the display control device 21 can control all the LEDs within the target display area to turn off. As all the LEDs turn off, the screen temperature gradually decreases until it cools to ambient temperature. When all the LEDs are simultaneously turned off for a preset duration, the target display area is considered to be in a cold screen state. For example, if all the LEDs have been off for 10 minutes, the target display area is considered to be in a cold screen state. Alternatively, before each pixel is turned on, the thermal compensation correction unit 23 can detect the ambient temperature. When the temperature difference between the real-time screen temperature and the ambient temperature is within a preset range, the target display area is considered to be in a cold screen state.

[0029] Step S102: Adjust the acquisition parameters of the acquisition device so that at least some of the light points in the target display area are in a state of adhesion.

[0030] In the embodiments of this application, the acquisition device 22 can acquire images of the target display area. The acquired light spot image includes the imaging of the light spots within the target display area, and at least some of the light spots within the target display area are in a state of "adhesion" in the light spot image. "At least some of the light spots are in a state of "adhesion" in the light spot image" means that there are no obvious dark bands between adjacent light spots (i.e., no areas with almost zero luminous flux). From the perspective of human observation, although the approximate location of the light spot (or the center of the light spot) can be identified from the light spot image, there are no clear boundaries between adjacent light spots, giving the overall impression of a somewhat blurry image.

[0031] Figure 3A and Figure 3B Schematic diagrams are shown of light spot images obtained using related techniques and the light spot images provided in this application, respectively. From Figure 3A As can be seen, the light spots are separated by a wide dark band 31. Due to the presence of dark band 31, the imaging of adjacent light spots does not interfere with each other. Imaging a single light spot requires a relatively large number of pixels, typically 7×7 pixels. From... Figure 3B It can also be seen that the signal strength between adjacent light points exhibits a process of decreasing strength and then increasing again (signal strength at...). Figure 3B (It is represented by shades of color), but there are no obvious dark bands between the light spots. Through comparison... Figure 3A and Figure 3B It can be seen that, Figure 3B In this case, the number of pixels corresponding to a single light point is even smaller. For example, based on the light point image provided in the embodiments of this application, the number of pixels corresponding to a single light point can be reduced to 2.8 × 2.8 pixels, or even lower.

[0032] The images of adjacent light points are in a state of overlap, which may include adjacent images and / or overlapping images. If the images of adjacent light points overlap, the degree of overlap can be adjusted based on factors such as accuracy and efficiency. As an example, the degree of overlap of the images of adjacent light points in the light point image can be between 10% and 80%. For instance, the degree of overlap of the images of adjacent light points in the light point image can be between 20% and 30%.

[0033] In a light spot image, the position of the light spot is related to its DN (Digital Number) value, brightness value, or grayscale value. Based on this relationship, a waveform diagram of the light spot can be plotted. The waveform diagram of the light spot can, for example, be used to characterize the spatial light distribution curve of the light spot. As an example, the horizontal axis of the waveform diagram can be used to characterize the position of the light spot, and the vertical axis can be used to characterize the DN value, brightness value, or grayscale value of the light spot. From the perspective of the waveform diagram, the imaging of adjacent light spots being in a state of overlap can include: in the waveform diagram, the waveform curves of adjacent light spots are connected end-to-end or overlap with each other. As an example, the difference between the maximum and minimum brightness in the light spot image is between 10% and 50%; and / or, the difference between the maximum and minimum grayscale in the light spot image is between 10% and 50%; and / or, the difference between the maximum and minimum DN value in the light spot image is between 10% and 50%.

[0034] To achieve the aforementioned effect of overlapping light points, the acquisition parameters of the acquisition device 22 need to be adjusted. For example, one or more of the following parameters of the acquisition device 22, such as aperture, exposure time, focal length (zoom lens), and macro focus, can be adjusted to cause the imaging of at least some light points in the target display area to diverge or contract, thereby causing the imaging of at least some light points in the target display area to be in an overlapping state.

[0035] It should be understood that, in addition to adjusting the acquisition parameters to make the image in a stuck state, one or more of the image clarity, peak value of the light spot, and proportion of the light spot of the acquisition device 22 can also be adjusted to meet the requirements, which will not be elaborated in this application.

[0036] Furthermore, the embodiments of this application do not specifically limit the order of steps S101 and S102. For example, the lights in the target display area can be lit first, and then the acquisition parameters can be adjusted so that the images of at least some of the lights in the target display area are in a state of adhesion. Alternatively, the acquisition parameters can be adjusted first based on experience or based on test images, and then the lights in the target display area can be lit.

[0037] In the embodiments of this application, there are various ways to determine whether the adjustment of the acquisition parameters meets the requirements (i.e., whether the adjusted acquisition parameters cause at least some of the light points in the target display area to be in a state of overlap). For example, corresponding preset ranges can be set for the degree of overlap of the light point images in the target display area, the difference between the maximum and minimum brightness, the difference between the maximum and minimum grayscale, and / or the difference between the maximum and minimum DN values. Then, by adjusting the acquisition parameters, the degree of overlap of the light point images acquired by the acquisition device 22, the difference between the maximum and minimum brightness, the difference between the maximum and minimum grayscale, and / or the difference between the maximum and minimum DN values ​​fall within the corresponding preset ranges. Once the degree of overlap of the light point images, the difference between the maximum and minimum brightness, the difference between the maximum and minimum grayscale, and / or the difference between the maximum and minimum DN values ​​fall within the corresponding preset ranges, it can be considered that the adjustment of the acquisition parameters has met the requirements.

[0038] Step S103: After the acquisition parameters are adjusted, control the acquisition device to take a picture of the target display area to obtain the cold screen light point image of the target display area.

[0039] In the embodiments of this application, the cold screen light dot image is the light dot image acquired when the display screen is in a cold screen state, such as the light dot image acquired when the display screen is powered on immediately after cooling to ambient temperature. The cold screen light dot image can be an image formed by lighting up one or more light dots of certain colors in the target display area (such as a solid color image). For example, the cold screen light dot image can include one or more of the following images: a cold screen green light image formed by lighting up green light dots in the target display area, a cold screen red light image formed by lighting up red light dots in the target display area, a cold screen blue light image formed by lighting up blue light dots in the target display area, and a cold screen mixed color image formed by lighting up light dots of at least two colors in the target display area.

[0040] It should be understood that by adjusting the acquisition device 22 in step S102 and using the acquisition device 22 to capture images of the target display area, an image of cold screen light points in which at least some light points are in a state of adhesion can be obtained.

[0041] Step S104: When the target display area reaches the hot screen state, control the acquisition device to take a picture of the target display area to obtain the hot screen light point image of the target display area.

[0042] In the embodiments of this application, the hot screen light point image is the light point image acquired when the display screen is in a hot screen state. Here, the hot screen state refers to the thermally stable state reached after the light points within the display screen generate a thermal effect. Similarly, by adjusting the acquisition device 22 in step S102 and using the acquisition device 22 to capture images of the target display area, a hot screen light point image in which at least some light points are in a state of adhesion can be obtained.

[0043] Specifically, whether the target display area has reached the hot screen state can be determined in the following way: Obtain the real-time temperature of the target display area's screen. If the rate of change of the real-time screen temperature within a preset time period is less than or equal to a threshold, then the target display area has reached the hot screen state. If the rate of change of the real-time screen temperature within a preset time period is greater than the threshold, then the target display area can be kept lit until it reaches the hot screen state. The preset time period can be set according to actual conditions, for example, it can be 5 minutes.

[0044] Similarly, the hot screen light image can be an image formed by lighting up one or more light spots of certain colors in the target display area (such as a solid color image). For example, the hot screen light image can include one or more of the following images: a hot screen green light image formed by lighting up green light spots in the target display area, a hot screen red light image formed by lighting up red light spots in the target display area, a hot screen blue light image formed by lighting up blue light spots in the target display area, and a hot screen mixed color image formed by lighting up light spots of at least two colors in the target display area.

[0045] Step S105: Obtain the thermal compensation coefficient based on the cold screen lamp point image and the hot screen lamp point image.

[0046] In the embodiments of this application, the thermal compensation correction unit 23 can determine the cold screen optical data of the target display area in a cold screen state based on the cold screen dot image, and similarly, can determine the hot screen optical data of the target display area in a hot screen state based on the hot screen dot image. The cold screen optical data and hot screen optical data can refer to optical information. As an example, the optical information may include one or more of the following: luminous flux information, brightness information, and chromaticity information. Luminous flux information can be used to characterize the luminous flux per unit area within the target display area. Brightness information can be used to characterize the brightness of the target display area. Chromaticity information can be used to characterize the hue and / or saturation of the colors in the target display area. A thermal compensation coefficient can be determined based on the cold screen optical data and the hot screen optical data.

[0047] Specifically, the thermal compensation coefficient can be obtained by dividing the optical data of the cold screen and the optical data of the hot screen. Therefore, when the target display area is in a hot screen state, the display data in the cold screen state can be converted to the display data in the hot screen state using the thermal compensation coefficient to compensate for the color change caused by temperature variations. For example, assuming the brightness of the target display area in the cold screen state is 2A and the brightness of the target display area in the hot screen state is A, the thermal compensation coefficient can be 2. To ensure that the user perceives the display brightness of the target display area as A in the cold screen state, the target display area can use display data with brightness A in the cold screen state. Considering the brightness decay problem caused by temperature rise, the display data with brightness A can be converted to display data with brightness 2A according to the thermal compensation coefficient 2. When the display shows the display data with brightness 2A in the hot screen state, the user actually perceives the display brightness as A, thus maintaining the consistency of brightness in both cold and hot screen states.

[0048] It should be understood that other methods of calculating thermal compensation coefficients are also applicable to this application, and this application does not impose any restrictions on them.

[0049] In the embodiments of this application, by lighting up the target display area point by point in a cold screen state to collect the cold screen light point image of the target display area, and correspondingly collecting the hot screen light point image of the target display area in a hot screen state, the data collection of the entire target display area in either a cold screen state or a hot screen state can be completed at once. This avoids the problem of drastic changes in screen temperature caused by the intermittent point collection method, and makes the thermal compensation coefficient obtained from the cold screen light point image and the hot screen light point image more accurate.

[0050] Furthermore, this embodiment adjusts the acquisition parameters so that at least some of the light points within the target display area are in a state of adhesion. In this light point image, the imaging area of ​​the light points in the adhesion state does not have obvious dark bands. In other words, the pixel value of each pixel in this light point imaging area contains useful target information. In the subsequent target information calculation process, the pixel information of each pixel will be fully utilized and will not be discarded like pixels in dark bands. This improves the pixel utilization rate of the acquisition device, enabling the acquisition device to capture a larger display area at once and improving the thermal compensation correction efficiency of the display screen.

[0051] In practical applications, a display screen can include multiple splicing units. Taking an LED display screen as an example, the screen can be composed of multiple LED light boxes spliced ​​together. Due to limitations in machining precision, assembly precision, and other technological constraints, at the splicing points, the distance between the light points at the edges of adjacent splicing units may be greater or less than the distance between light points in other areas, thus forming gaps (or seams). The luminous density of the light points at the gaps may differ from the luminous density of the light points in other areas. Compared with the light point images based on dark bands used in related technologies, the light point images used in this application embodiment include not only the information of the light points but also the gap information between the splicing units. Therefore, this light point image can reflect not only the display quality of the light points but also the impact of the gaps on the display quality. Thus, the obtained thermal compensation coefficient can be used not only to correct the light points but also to correct the gaps, combining light point correction and gap correction into one, further improving the correction efficiency of the display screen.

[0052] To ensure the accuracy of the thermal compensation coefficient, the type of the hot screen LED image should be consistent with the type of the cold screen LED image. In other words, when the cold screen LED image is the image formed by lighting up one or more LEDs of a certain color within the target display area, the hot screen LED image should be the image formed by lighting up the same type or of the same colors within the target display area.

[0053] Specifically, step S101 can be controlling the target display area to display a pattern of the target color in a cold screen state. Correspondingly, step S103 can be, after the acquisition parameters are adjusted, controlling the acquisition device to capture an image of the target display area, obtaining a cold screen light dot image of the target color. At this time, controlling the target display area to display a pattern of the target color in a hot screen state. Controlling the acquisition device to capture an image of the target display area can obtain a hot screen light dot image of the target color. Based on the cold and hot screen light dot images of the target color, the thermal compensation coefficient for the target color can be calculated.

[0054] For example, one can acquire images of red LEDs on a cold screen and red LEDs on a hot screen, and calculate the thermal compensation coefficient of the red LEDs based on these images; acquire images of green LEDs on a cold screen and green LEDs on a hot screen, and calculate the thermal compensation coefficient of the green LEDs based on these images; acquire images of blue LEDs on a cold screen and blue LEDs on a hot screen, and calculate the thermal compensation coefficient of the blue LEDs based on these images; and / or acquire images of white LEDs on a cold screen and white LEDs on a hot screen, and calculate the thermal compensation coefficients of the red, green, and blue LEDs based on these images.

[0055] It should be understood that the target color mentioned above can be one or more of the aforementioned examples. When there are multiple target colors, the cold screen light point image and the hot screen light point image corresponding to each color light point can be obtained, and then the thermal compensation coefficient corresponding to all color light points can be calculated. Alternatively, the thermal compensation coefficient corresponding to each color can be calculated one by one.

[0056] In order to make the target display area in a hot screen state, in some preferred embodiments, the target display area can be controlled to display a mixed color pattern to make the target display area reach the hot screen state. After the target display area reaches the hot screen state, the target display area is controlled to display a target color pattern in the hot screen state, and the acquisition device is controlled to take pictures of the target display area to obtain a hot screen light point image of the target display area under the target color.

[0057] In other words, at least two colors of LEDs in the target display area can be controlled to light up first, so that the target display area reaches a hot screen state. After the target display area reaches the hot screen state, other LEDs except for the target color are turned off, and an image of the hot screen LEDs under the target color in the target display area is captured. Preferably, the pattern of the mixed color mentioned above can refer to the mixed color of all the colors contained in the LEDs. For example, for LEDs of red, blue and green, the mixed color refers to white.

[0058] In this way, on the one hand, when displaying mixed-color patterns, multiple LEDs in the target display area light up (for example, when displaying a white pattern, red, green, and blue LEDs need to light up simultaneously). Compared to lighting up only one color LED, the target display area heats up faster and reaches the hot screen state more quickly, which helps improve the efficiency of thermal compensation correction. On the other hand, because multiple LEDs are lit, the hot screen state reached by the target display area is the same as or similar to the thermal stability state reached when all LEDs of the entire display screen are lit. This hot screen state is more stable than the hot screen state reached when only one color LED is lit, which helps the obtained hot screen LED image to more accurately represent the LED situation when the target display area reaches the actual thermal stability state.

[0059] When obtaining the thermal compensation coefficient in step S105, it is necessary to perform calculations based on cold screen optical data and hot screen optical data. There are multiple ways to obtain cold screen optical data and hot screen optical data. The following describes in detail the methods for obtaining cold screen optical data and hot screen optical data in conjunction with embodiments.

[0060] To calculate the thermal compensation coefficient, it is generally necessary to first locate the light points, that is, to determine the position of the light points in the target display area within the cold screen light point image (or hot screen light point image), or in other words, to determine the correspondence between the light points in the target display area and the pixels in the cold screen light point image (or hot screen light point image). Then, based on the pixels corresponding to the light points, the optical data corresponding to each light point can be determined, thereby determining the cold screen optical data and the hot screen optical data.

[0061] There are several methods for locating LED lights. For example, a template for the pixels corresponding to each LED light can be pre-defined. Then, based on this template, the pixels corresponding to each LED light can be extracted from the cold screen LED light image (or hot screen LED light image) using template matching. Next, the optical data corresponding to each LED light can be obtained based on these pixels. Alternatively, an edge detection algorithm can be used to calculate the pixels corresponding to each LED light in the cold screen LED light image (or hot screen LED light image), and then the optical data corresponding to each LED light can be obtained based on these pixels.

[0062] In addition to the above methods, this application also proposes a simpler and more efficient lamp positioning method, namely a lamp positioning method based on the lamp arrangement information of the target display area.

[0063] The "light arrangement information of the target display area" can be used to indicate the arrangement method and / or position of the indicator lights within the target display area. For example, the light arrangement information of the target display area can indicate the number of rows / columns of lights contained in the target display area, thereby indicating the arrangement method or position of the lights within the target display area. Since the target display area is known, the "light arrangement information of the target display area" is actually a kind of prior information that can be known in advance.

[0064] Taking a rectangular target display area as an example, the LED arrangement information of the target display area can refer to the resolution information of that target display area. For example, assuming the resolution of the target display area is 1920×1080, and the cold screen LED image (or hot screen LED image) is the image formed after all the red LEDs in the target display area are lit, then the resolution information of the target display area can be directly used as the LED arrangement information. This resolution information can indicate that there are 1920 rows of LEDs arranged in the row direction and 1080 columns of LEDs arranged in the column direction of the target display area. Since the LEDs are generally evenly distributed, this LED arrangement information is equivalent to indicating the specific position of each LED in the LED image. After simple calculation, the position of each LED can be determined. For example, the image can be evenly divided into 1920×1080 pixel areas according to the resolution, and then each pixel area can represent the position of one LED.

[0065] The following text combines Figure 4The process of extracting optical data from cold screen lamp images (or hot screen lamp images) based on lamp layout information is illustrated in more detail with examples.

[0066] Step S401: Based on the lamp layout information of the target display area, determine the correspondence between the lamps in the target display area and the pixels in the cold screen lamp image, and the correspondence between the lamps in the target display area and the pixels in the hot screen lamp image.

[0067] For example, if the lamp layout information indicates that there are 2k×1k lamps in the target display area, and assuming the cold screen lamp image (or hot screen lamp image) contains 6k×3k pixels, then one lamp in the target display area corresponds to a 3×3 pixel location in the corresponding position of the cold screen lamp image (or hot screen lamp image). Alternatively, based on the lamp layout information of the target display area, the cold screen lamp image (or hot screen lamp image) can be sampled so that the pixels in the sampled image correspond one-to-one with the lamps in the target display area. In this way, the optical data of each pixel in the sampled image can be directly used as the optical data of the lamp corresponding to that pixel in the target display area. As a concrete example, if the lamp layout information indicates that the target display area contains 2k×1k lamps, and the lamp image contains 6k×3k pixels, then the cold screen lamp image (or hot screen lamp image) can be sampled first to ensure that the cold screen lamp image (or hot screen lamp image) contains 2k×1k pixels. After this sampling operation, a light spot in the target display area corresponds to a pixel at the corresponding position in the light spot image, simplifying the calculation of subsequent optical data.

[0068] It should be understood that the above sampling operation can take many forms. For example, the average sampling (such as mean downsampling) can be performed on adjacent pixels in the cold screen light dot image (or hot screen light dot image), or the adjacent pixels of the pixel at the sampling center position can be directly discarded. As an example, the average downsampling in the column direction can be performed on each column of pixels in the cold screen light dot image (or hot screen light dot image) to sample the number of pixels in each column to the same resolution as the height direction of the target display area; then, the average downsampling in the row direction can be performed on each row of pixels in the cold screen light dot image (or hot screen light dot image) to obtain a light dot image with the same resolution as the target display area. Similarly, you can first perform mean downsampling in the row direction on each row of pixels in the cold screen light dot image (or hot screen light dot image), and then perform mean downsampling in the column direction on each column of pixels in the cold screen light dot image (or hot screen light dot image). Alternatively, you can perform mean downsampling in both the row and column directions on the cold screen light dot image (or hot screen light dot image) simultaneously until you obtain a light dot image with the same resolution as the target display area.

[0069] Step S402: Determine the cold screen optical data corresponding to the light points in the target display area based on the correspondence between the light points in the target display area and the pixels in the cold screen light point image.

[0070] Step S403: Determine the hot screen optical data corresponding to the light points in the target display area based on the correspondence between the light points in the target display area and the pixels in the hot screen light point image.

[0071] For example, the luminance data of the pixel corresponding to a certain light point in a cold screen light point image (or hot screen light point image) can be directly used as the luminance data of that light point. Similarly, the chromaticity data of the pixel corresponding to a certain light point in a cold screen light point image (or hot screen light point image) can be directly used as the chromaticity data of that light point. Likewise, the luminous flux data of the pixel corresponding to a certain light point in a cold screen light point image (or hot screen light point image) can be directly used as the luminous flux data of that light point.

[0072] Step S404: Determine the thermal compensation coefficient based on the cold screen optical data and hot screen optical data corresponding to the light points in the target display area.

[0073] Specifically, based on the cold screen optical data and hot screen optical data corresponding to the lamp points within the target display area, the thermal compensation coefficient corresponding to each lamp point can be determined, the thermal compensation coefficient of the entire target display area can be determined, or the thermal compensation coefficient of a portion of a sub-area within the target display area can be determined. The calculation method for the thermal compensation coefficient can be found in the description of step S105, and will not be elaborated upon here.

[0074] In other embodiments of this application, the target display area can be divided into multiple partitions, and the position information of the multiple partitions in the light spot image can be obtained. Then, the optical data corresponding to each partition can be extracted separately. Since the deformation of each region due to perspective changes after partitioning is relatively small compared to the entire target display area, extracting optical data based on partitions will improve the accuracy of information extraction.

[0075] Specifically, after the acquisition equipment is calibrated, it can be used to additionally capture calibration images of the target display area when the calibration pattern is displayed. This calibration pattern can be used to divide the target display area into multiple zones. Since the lamp point image and the calibration pattern are images captured under the same acquisition parameters and on the same display area (i.e., the target display area), the distortions in the two images are identical. Therefore, based on the positional information of the multiple zones contained in the calibration pattern, the positions of these multiple zones in the lamp point image are accurately located. The number of zones into which the target display area is divided by the calibration pattern and the size of each zone can be set according to actual conditions.

[0076] Since the positions of the light dots of different colors are different, different calibration patterns corresponding to the light dots of different colors can make the positioning more accurate. In some embodiments, the cold screen light dot image mentioned above may include a first light dot image and a second light dot image. The first light dot image and the second light dot image correspond to light dots of different colors within the target display area. Correspondingly, the hot screen light dot image may include a third light dot image corresponding to the first light dot image and a fourth light dot image corresponding to the second light dot image. That is, the first light dot image and the third light dot image correspond to light dots of the same or some of the same colors within the target display area, and the second light dot image and the fourth light dot image correspond to light dots of the same or some of the same colors within the target display area. Correspondingly, the calibration image may also include a first calibration image corresponding to the first light dot image and a second calibration image corresponding to the second light dot image. The first calibration image and the second calibration image are different. Specifically, depending on the different positions of the light points of different colors, the first calibration image can be a pattern that has a certain positional offset from the second calibration image. The positional offset between the first calibration image and the second calibration image can be the same as the positional offset between the corresponding light points of the two colors within the same pixel.

[0077] For example, the first light point image can be a cool-screen red light point image, and the second light point image can be a cool-screen blue light point image. The third light point image can be a hot-screen red light point image, and the fourth light point image can be a hot-screen blue light point image. The red light point image, combined with a red calibration image, yields the cool-screen optical data of the red light point based on the red calibration image and the cool-screen red light point image. Similarly, the hot-screen optical data of the blue light point can be obtained from the blue calibration image and the cool-screen blue light point image.

[0078] It should be understood that the order in which the calibration pattern is displayed and the pattern used to extract optical data is displayed in the target display area is not limited in this application.

[0079] In some embodiments, the calibration pattern may include patterns corresponding to multiple partitions within the target display area. By displaying multiple partitions of the target display area, the calibration pattern allows for the location of these partitions in the lamp point image. The multiple patterns corresponding to each partition in the calibration pattern can be alternating bright and dark patterns. Alternating bright and dark patterns are beneficial for accurately identifying the boundaries of each partition. The target display area has a resolution of 1920. Taking 1080p as an example, the screen can be displayed according to a checkerboard pattern. For example, by displaying the green light points of the target display area point by point to obtain the green light point image, a green and black checkerboard pattern can be obtained. Each checkerboard pattern can, for example, include 64 squares. 60 pixels.

[0080] Besides a checkerboard pattern, the marking pattern can also be one or more combinations of the following: crosshairs, Aruco codes, special lines, dots, and grids. The special lines can be several vertical lines; for example, displaying three vertical lines in the target display area divides the screen's display area into four zones. The Aruco codes are binary codes, which can be understood as a rectangular code composed of only two colors. The dots are a pattern composed of multiple dots.

[0081] like Figure 5 As shown, the process of extracting optical data based on partitions may include the following steps S501 to S506.

[0082] Step S501: After the acquisition parameters are adjusted, the target display area of ​​the control screen displays a calibration pattern.

[0083] Step S502: Control the acquisition device to capture images of the target display area.

[0084] In other words, after the acquisition parameters are adjusted, the target display area can be controlled to display the calibration pattern, and the acquisition device can be controlled to capture the calibration pattern. For a description of the acquisition parameter adjustment, please refer to step S102 above.

[0085] Step S503: According to the calibration pattern, the cold screen light point image is divided into multiple cold screen images that correspond one-to-one with multiple partitions.

[0086] Step S504: Based on the multiple cold screen images, determine the cold screen optical data corresponding to each of the multiple partitions.

[0087] Step S505: According to the calibration pattern, the hot screen light dot image is divided into multiple hot screen images that correspond one-to-one with multiple partitions.

[0088] Step S506: Based on multiple hot screen images, determine the hot screen optical data corresponding to each of the multiple partitions.

[0089] For example, if the calibration pattern contains location information for multiple zones, the cold screen light point image (or hot screen light point image) can be divided into multiple cold screen images (or multiple hot screen images) based on this location information, so that each cold screen image (or hot screen image) represents a zone. Based on these multiple cold screen images (or multiple hot screen images), the cold screen optical data (or hot screen optical data) corresponding to each zone is determined; and based on the cold screen optical data and hot screen optical data corresponding to the multiple zones, the thermal compensation coefficient is obtained.

[0090] This embodiment transforms the task of determining the cold screen optical data (or hot screen optical data) of the target display area based on the cold screen light point image (or hot screen light point image) into multiple sub-tasks. Each sub-task is used to determine the cold screen optical data (or hot screen optical data) corresponding to a partition within the target display area. Then, this embodiment can summarize the cold screen optical data and hot screen optical data corresponding to each partition to obtain the cold screen data and hot screen data of the target display area. Since the deformation corresponding to each partition is relatively small, dividing the target display area into multiple partitions and extracting optical data on a partition-by-partition basis can reduce the impact of deformation caused by the acquisition device on the accuracy of the acquired optical data.

[0091] It should be noted that there are multiple ways to implement steps S504 and S506. For ease of description, the following description will take the first partition (which can be any one of the multiple partitions, and the first partition corresponds to the first image in the multiple cold screen images divided from the cold screen light point image) and the second partition (which can also be any one of the multiple partitions, and the first partition corresponds to the second image in the multiple hot screen images divided from the hot screen light point image) as examples.

[0092] Before acquiring the optical data of the cold screen using the first image, it is generally necessary to first locate the light points, that is, to determine the position of the light points in the first partition in the first image, or in other words, to determine the correspondence between the light points in the first partition and the pixels in the first image. Then, based on the pixels corresponding to each light point, the optical data of the cold screen corresponding to each light point can be determined.

[0093] There are several ways to locate light points in a partition. For example, a template for the pixels corresponding to each light point can be pre-defined. Then, based on this template, the pixels corresponding to each light point can be extracted from the first image through template matching. Finally, the cold screen optical data corresponding to each light point can be obtained based on the pixels corresponding to each light point. Alternatively, an edge detection algorithm can be used to calculate the pixels corresponding to each light point in the first image, and then the cold screen optical data corresponding to each light point can be obtained based on the pixels corresponding to each light point.

[0094] In addition to the methods described above, this application also proposes a simple and efficient light point positioning method, namely, a light point positioning method based on the light point layout information of the first zone. The "light point layout information of the first zone" can be used to indicate the layout method and / or position of the indicator lights within the first zone. For example, the light point layout information of the first zone can indicate the number of rows / columns of the lights contained in the first zone, thereby indicating the layout method or position of the lights within the first zone. Since the first zone is known, the "light point layout information of the first zone" is actually a kind of prior information obtained in advance.

[0095] Taking a rectangular area as an example, the light distribution information of the first partition can refer to the resolution information of that partition. For instance, assuming the resolution of the first partition is 480×270, and the first image is formed after all the red lights in the first partition are lit, the resolution information of the first partition can be directly used as the light distribution information. This resolution information indicates that there are 480 rows of lights arranged in the row direction and 270 columns of lights arranged in the column direction of the first partition. Since the lights are generally evenly distributed, this resolution information is equivalent to indicating the specific position of each light in the first image. After simple calculation, the light location can be completed. Compared with methods such as template matching and edge detection, this light location method is simpler and more efficient.

[0096] Specifically, based on the lamp layout information of the first partition, the correspondence between the lamps in the first partition and the pixels in the first image can be determined. Based on this correspondence, the cold screen optical data corresponding to the lamps in the first partition can be determined.

[0097] For example, if the lamp layout information for the first partition indicates that there are 640×360 lamps within the first partition, and the first image contains 1920×1080 pixels, then one lamp in the first partition corresponds to a 3×3 pixel location in the lamp image. Alternatively, the first image can be sampled based on the lamp layout information for the first partition, so that the pixels in the sampled image correspond one-to-one with the lamps in the first partition. In this way, the optical data of each pixel in the sampled image can be directly used as the cold screen optical data for the corresponding lamp in the first partition. As a concrete example, if the lamp layout information for the first partition indicates that the first partition contains 640×360 lamps, and the first image contains 1920×1080 pixels, then the first image can be sampled first, so that the first image contains 640×360 pixels. After this sampling operation, one lamp in the first partition corresponds to a pixel at a corresponding location in the first image. Based on this one-to-one correspondence, the subsequent calculation of optical data can be simplified.

[0098] At this point, the brightness information of the pixel corresponding to a certain light point in the first image can be directly used as the brightness information of that light point. Similarly, the chromaticity information of the pixel corresponding to a certain light point in the first image can be directly used as the chromaticity information of that light point. Likewise, the luminous flux information of the pixel corresponding to a certain light point in the first image can be directly used as the luminous flux information of that light point.

[0099] Similarly, before acquiring the hot screen optical data using the second image, it is generally necessary to first locate the light points, that is, determine the position of the light points within the second partition in the second image, or in other words, determine the correspondence between the light points within the second partition and the pixels in the second image. Then, based on the pixels corresponding to each light point, the hot screen optical data corresponding to each light point can be determined. For specific implementation methods, please refer to the explanation of determining the cold screen optical data corresponding to each light point.

[0100] In practical applications, considering that the imaging of the acquisition device 22 has a certain degree of distortion, in some embodiments, the cold screen light spot image and the hot screen light spot image can also be transformed (such as perspective transformation) to make it imaged as a non-tilted rectangle.

[0101] Furthermore, the adjustment of acquisition parameters can be completed through the image preview interface of the acquisition device. For example, the software system in the thermal compensation calibration unit can be used to present the image preview interface of the acquisition device to assist evaluation and / or calibration personnel in adjusting the acquisition device parameters. This image preview interface can display a preview image of the light spot. If the light spot imaging in the preview image is not in a state of overlap, the evaluation and / or calibration personnel can adjust the acquisition parameters in this image preview interface until the imaging between the light spots is in a state of overlap. The image preview interface can also display indication information, which can be used to indicate the size that the preview image of the light spot should reach, or to indicate the minimum size of the preview image, to prompt the evaluation and / or calibration personnel to control the size of the preview image within an appropriate range. When the evaluation and / or calibration personnel find that the preview image does not meet the requirements of the indication information, they can adjust the distance between the acquisition device and the display screen (or adjust the focal length or microfocus of the acquisition device) until the size of the light spot image meets the requirements.

[0102] The following is combined with Figure 6 A specific example of thermal compensation correction is given, which can be derived from... Figure 1 The thermal compensation correction system 10 shown is in operation. It should be noted that... Figure 6 The examples described are merely to help those skilled in the art understand the embodiments of this application, and are not intended to limit the embodiments of this application to the specific numerical values ​​or specific scenarios illustrated. Those skilled in the art will obviously be able to make various equivalent modifications or variations based on the given examples, and such modifications or variations also fall within the scope of the embodiments of this application.

[0103] See Figure 6 In step S601, the target display area of ​​the screen is controlled to display red, green, and blue LED images respectively in a cold screen state. In other words, the screen can be controlled to sequentially illuminate red, green, and blue pure colors in a cold screen state. The grayscale of the illumination can be set according to customer requirements.

[0104] Step S602: Control the camera to acquire images of the cold screen LED dots in the target display area and generate luminous flux information corresponding to the LED dots on the display screen. Specifically, before acquiring the cold screen LED dot images, adjust the camera so that the images of the LED dots appear to be in a connected state. Then, use the camera to acquire brightness information. Next, the image shape of the LED dot images can be straightened by perspective transformation, and the cold screen LED dot images are downsampled to make the resolution of the cold screen LED dot images the same as the resolution of the LED display screen. After downsampling the cold screen LED dot images, the luminous flux information corresponding to each LED dot in the LED display screen can be calculated based on the one-to-one correspondence between the cold screen LED dot images and the LED dots.

[0105] In step S603, when the target display area reaches a hot screen state, the target display area is controlled to display red, green, and blue LED images respectively. In other words, the display screen can be controlled to sequentially illuminate red, green, and blue pure colors. The grayscale of the illuminated image is the same as in step S601.

[0106] Step S604: Control the camera to acquire images of the hot screen light points on the display screen and generate hot screen luminous flux information corresponding to the light points on the display screen.

[0107] Step S605: Based on the cold screen luminous flux information and hot screen luminous flux information corresponding to the lamp points, perform thermal compensation correction on the brightness of the target display area.

[0108] Please refer to Figure 7 , Figure 7 This describes the thermal compensation correction provided in the embodiments of this application from the perspective of software code or processor. Figure 7 The method shown can be executed, for example, by the processor or software system of the thermal compensation correction unit mentioned above. Figure 7 The relevant concepts in the method have been explained in detail above and will not be repeated here.

[0109] Step S701: Obtain a cold screen dot image of the target display area of ​​the display screen, showing the lights being illuminated point by point in a cold screen state. The target display area is part or all of the display area of ​​the screen, and at least some of the dots in the cold screen dot image are in a state of overlap.

[0110] Step S702: Obtain an image of the target display area's hot screen dots illuminated point by point in a hot screen state. At least some of the dots in the hot screen dot image are in a state of overlap.

[0111] Step S703: Obtain the thermal compensation coefficient based on the cold screen light spot image and the hot screen light spot image. The thermal compensation coefficient is used to convert data between the cold screen state and the hot screen state.

[0112] In some embodiments, the imaging of at least some of the light points arranged in the target display area in the cold screen light point image and the hot screen light point image being in a state of adhesion may include: the imaging of adjacent light points among the at least some light points in the light point image being in a state of adjacency or overlap.

[0113] In some embodiments, the degree of overlap between the images of adjacent light points in the cold screen light point image and / or the hot screen light point image is between 10% and 80%.

[0114] In some embodiments, the difference between the maximum and minimum brightness in the cold screen light spot image and / or the hot screen light spot image is between 10% and 50%; and / or, the difference between the maximum and minimum grayscale in the cold screen light spot image and / or the hot screen light spot image is between 10% and 50%; and / or, the difference between the maximum and minimum DN value in the cold screen light spot image and / or the hot screen light spot image is between 10% and 50%.

[0115] In some embodiments, the target display area includes multiple splicing units, and the target information is also used to correct the gaps between the multiple splicing units.

[0116] In some embodiments, the thermal compensation coefficient is also used to thermally compensate and correct the gaps between multiple splicing units.

[0117] In some embodiments, step S703 may include: obtaining cold screen optical data from a cold screen light dot image based on the light dot arrangement information of the target display area; obtaining hot screen optical data from a hot screen light dot image based on the light dot arrangement information of the target display area; and obtaining a thermal compensation coefficient based on the cold screen optical data and the hot screen optical data.

[0118] In some embodiments, obtaining cold screen optical data from the cold screen dot image based on the dot arrangement information of the target display area may include: determining the correspondence between the dots in the target display area and the pixels in the cold screen dot image based on the dot arrangement information of the target display area; determining the cold screen optical data corresponding to the dots in the target display area based on the correspondence between the dots in the target display area and the pixels in the cold screen dot image; and obtaining the cold screen optical data of the target display area based on the cold screen optical data corresponding to the dots in the target display area.

[0119] In some embodiments, obtaining hot screen optical data from the hot screen dot image based on the dot arrangement information of the target display area may include: determining the correspondence between the dots in the target display area and the pixels in the hot screen dot image based on the dot arrangement information of the target display area; determining the hot screen optical data corresponding to the dots in the target display area based on the correspondence between the dots in the target display area and the pixels in the hot screen dot image; and obtaining the hot screen optical data of the target display area based on the hot screen optical data corresponding to the dots in the target display area.

[0120] In some embodiments, determining the correspondence between the light spots in the target display area and the pixels in the cold screen light spot image based on the light spot arrangement information of the target display area may include: sampling the cold screen light spot image based on the light spot arrangement information of the target display area, so that the pixels in the sampled image correspond one-to-one with the light spots in the target display area.

[0121] In some embodiments, determining the correspondence between the light spots in the target display area and the pixels in the hot screen light spot image based on the light spot arrangement information of the target display area may include: sampling the hot screen light spot image based on the light spot arrangement information of the target display area, so that the pixels in the sampled image correspond one-to-one with the light spots in the target display area.

[0122] In some embodiments, the thermal compensation correction method may further include: acquiring a calibration image of the target display area, the calibration image being used to divide the target display area into multiple partitions; step S703 may include: acquiring target information based on the cold screen dot image, the hot screen dot image, and the calibration pattern.

[0123] In some embodiments, obtaining the thermal compensation coefficient based on the calibration image, the cold screen light spot image, and the hot screen light spot image may include: obtaining cold screen optical data based on the calibration image and the cold screen light spot image; obtaining hot screen optical data based on the calibration image and the hot screen light spot image; and obtaining the thermal compensation coefficient based on the cold screen optical data and the hot screen optical data.

[0124] In some embodiments, the cold screen light dot image includes a first light dot image and a second light dot image, the first light dot image and the second light dot image corresponding to light dots of different colors in the target display area; the hot screen light dot image includes a third light dot image corresponding to the first light dot image and a fourth light dot image corresponding to the second light dot image; the calibration pattern includes a first calibration pattern corresponding to the first light dot image and a second calibration pattern corresponding to the second light dot image, the first calibration pattern and the second calibration pattern being different.

[0125] In some embodiments, acquiring a cold screen light spot image includes: acquiring a cold screen light spot image when the target display area presents a pattern of the target color; acquiring a hot screen light spot image includes: after the target display area presents a pattern of mixed colors and reaches the hot screen state, acquiring a hot screen light spot image when the target display area presents a pattern of the target color.

[0126] In some embodiments, the calibration pattern includes multiple patterns corresponding to multiple partitions, and the multiple patterns are alternating light and dark patterns.

[0127] In some embodiments, the plurality of partitions are all rectangular in shape.

[0128] In some embodiments, based on the calibration pattern, the cold screen light point image can be divided into multiple cold screen images corresponding to multiple partitions, and the hot screen light point image can be divided into multiple hot screen images corresponding to multiple partitions; based on the multiple cold screen images, the cold screen optical data corresponding to the multiple partitions can be determined respectively; based on the multiple hot screen images, the hot screen optical data corresponding to the multiple partitions can be determined respectively.

[0129] In some embodiments, the plurality of cold screen images include a first image, and the plurality of partitions include a first partition corresponding to the first image; the plurality of hot screen images include a second image, and the plurality of partitions include a second partition corresponding to the second image; determining the cold screen optical data corresponding to each of the plurality of partitions based on the plurality of cold screen images includes: determining the correspondence between the light points in the first partition and the pixels in the first image based on the light point arrangement information of the first partition; determining the cold screen optical data corresponding to the light points in the first partition based on the correspondence between the light points in the first partition and the pixels in the first image; determining the hot screen optical data corresponding to each of the plurality of partitions based on the plurality of hot screen images includes: determining the correspondence between the light points in the second partition and the pixels in the second image based on the light point arrangement information of the second partition; determining the hot screen optical data corresponding to the light points in the second partition based on the correspondence between the light points in the second partition and the pixels in the second image.

[0130] In some embodiments, determining the correspondence between the light points in the first partition and the pixels in the first image based on the light point layout information of the first partition may include: sampling the first image based on the light point layout information of the first partition, such that the pixels in the sampled image correspond one-to-one with the light points in the first partition.

[0131] In some embodiments, determining the correspondence between the light points in the second partition and the pixels in the second image based on the light point layout information of the second partition may include: sampling the second image based on the light point layout information of the second partition, such that the pixels in the sampled image correspond one-to-one with the light points in the second partition.

[0132] In some embodiments, prior to step S703 Figure 7 The method may also include: performing perspective transformation on cold screen light spot images and / or hot screen light spot images to correct the shape of the light spot images to a rectangle.

[0133] In some embodiments, Figure 7 The method may further include: presenting indication information on the image preview interface of the camera, the indication information being used to indicate the minimum size of the preview image of the light spot image.

[0134] In some embodiments, the indication information includes a rectangular area displayed on the image preview interface, and the indication information is used to indicate that the minimum size of the preview image needs to be greater than the size corresponding to the rectangular area.

[0135] In some embodiments, the lamp arrangement information may be resolution information.

[0136] In some embodiments, the cold screen optical data and the hot screen optical data are optical information, which may include one or more of the following: luminous flux information, brightness information, and chromaticity information.

[0137] In some embodiments, the light image may include one or more of a blue light image, a red light image, a green light image, and a mixed color image.

[0138] In some embodiments, acquiring a cold screen dot image of the target display area of ​​the display screen being illuminated point by point in a cold screen state includes: acquiring a cold screen dot image when the target display area presents a pattern of the target color; acquiring a hot screen dot image of the target display area being illuminated point by point in a hot screen state includes: after the target display area presents a pattern of mixed colors and reaches the hot screen state, acquiring a hot screen dot image when the target display area presents a pattern of the target color.

[0139] In some embodiments, the display screen is an LED display screen, and the light points within the target display area are LED pixel lights.

[0140] It should be noted that, for the sake of simplicity, the aforementioned method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, because according to this application, some steps can be performed in other orders.

[0141] Figure 8 This is a schematic diagram of a thermal compensation correction device provided in one embodiment of this application. The device 800 may include components for performing... Figure 7 The method described in the module 800 includes a cold screen image acquisition module 801, a hot screen image acquisition module 802, and a thermal compensation coefficient acquisition module 803.

[0142] The cold screen image acquisition module 801 can be used to acquire the cold screen lamp image of the target display area of ​​the display screen in the cold screen state, wherein the target display area is part or all of the display area of ​​the display screen, and at least some of the lamps in the cold screen lamp image are in a sticky state. The hot screen image acquisition module 802 can be used to acquire the hot screen light point image of the target display area in the hot screen state, where at least some of the light points in the hot screen light point image are in a sticky state. The thermal compensation coefficient acquisition module 803 can be used to obtain a thermal compensation coefficient based on the cold screen light point image and the hot screen light point image. The thermal compensation coefficient is used to perform data conversion between the cold screen state and the hot screen state.

[0143] In some embodiments, the imaging of at least some of the light points arranged in the target display area in the cold screen light point image and the hot screen light point image being in a state of adhesion may include: the imaging of adjacent light points among the at least some light points in the light point image being in a state of adjacency or overlap.

[0144] In some embodiments, the degree of overlap between the images of adjacent light points in the cold screen light point image and / or the hot screen light point image is between 10% and 80%.

[0145] In some embodiments, the difference between the maximum and minimum brightness in the cold screen light spot image and / or the hot screen light spot image is between 10% and 50%; and / or, the difference between the maximum and minimum grayscale in the cold screen light spot image and / or the hot screen light spot image is between 10% and 50%; and / or, the difference between the maximum and minimum DN value in the cold screen light spot image and / or the hot screen light spot image is between 10% and 50%.

[0146] In some embodiments, the target display area includes multiple splicing units, and the target information is also used to correct the gaps between the multiple splicing units.

[0147] In some embodiments, the thermal compensation coefficient is also used to thermally compensate and correct the gaps between multiple splicing units.

[0148] In some embodiments, the thermal compensation coefficient acquisition module 803 may be specifically used to: acquire cold screen optical data from the cold screen light point image based on the light point arrangement information of the target display area, acquire hot screen optical data from the hot screen light point image based on the light point arrangement information of the target display area, and acquire the thermal compensation coefficient based on the cold screen optical data and the hot screen optical data.

[0149] In some embodiments, the thermal compensation coefficient acquisition module 803 may be specifically used to: determine the correspondence between the light points in the target display area and the pixels in the cold screen light point image based on the light point arrangement information of the target display area; determine the cold screen optical data corresponding to the light points in the target display area based on the correspondence between the light points in the target display area and the pixels in the cold screen light point image; and acquire the cold screen optical data of the target display area based on the cold screen optical data corresponding to the light points in the target display area.

[0150] In some embodiments, the cold screen image acquisition module 801 can be used to: acquire a cold screen light spot image when the target display area presents a pattern of the target color; the hot screen image acquisition module 802 can be used to: acquire a hot screen light spot image when the target display area presents a pattern of the target color after the target display area presents a mixed color pattern and reaches the hot screen state.

[0151] In some embodiments, the thermal compensation coefficient acquisition module 803 may be specifically used to: determine the correspondence between the light points in the target display area and the pixels in the hot screen light point image based on the light point arrangement information of the target display area; determine the hot screen optical data corresponding to the light points in the target display area based on the correspondence between the light points in the target display area and the pixels in the hot screen light point image; and acquire the hot screen optical data of the target display area based on the hot screen optical data corresponding to the light points in the target display area.

[0152] In some embodiments, the thermal compensation coefficient acquisition module 803 may be specifically used to: sample the cold screen light point image according to the light point arrangement information of the target display area, so that the pixels in the sampled image correspond one-to-one with the light points in the target display area.

[0153] In some embodiments, the thermal compensation coefficient acquisition module 803 may be specifically used to: sample the hot screen light spot image according to the light spot arrangement information of the target display area, so that the pixels in the sampled image correspond one-to-one with the light spots in the target display area.

[0154] In some embodiments, the above-described apparatus 800 may further include a calibration module, configured to: acquire a calibration pattern presented in the target display area, wherein the calibration pattern is used to divide the target display area into multiple partitions; the thermal compensation coefficient acquisition module 803 may be specifically configured to: acquire target information based on the cold screen light spot image, the hot screen light spot image and the calibration pattern.

[0155] In some embodiments, the thermal compensation coefficient acquisition module 803 may be specifically used to: obtain cold screen optical data based on the calibration image and the cold screen light point image; obtain hot screen optical data based on the calibration image and the hot screen light point image; and obtain a thermal compensation coefficient based on the cold screen optical data and the hot screen optical data.

[0156] In some embodiments, the cold screen light dot image includes a first light dot image and a second light dot image, the first light dot image and the second light dot image corresponding to light dots of different colors in the target display area; the hot screen light dot image includes a third light dot image corresponding to the first light dot image and a fourth light dot image corresponding to the second light dot image; the calibration pattern includes a first calibration pattern corresponding to the first light dot image and a second calibration pattern corresponding to the second light dot image, the first calibration pattern and the second calibration pattern being different.

[0157] In some embodiments, the calibration pattern includes multiple patterns corresponding to multiple partitions, and the multiple patterns are alternating light and dark patterns.

[0158] In some embodiments, the plurality of partitions are all rectangular in shape.

[0159] In some embodiments, the thermal compensation coefficient acquisition module 803 may be specifically used to: divide the cold screen light point image into multiple cold screen images corresponding to multiple partitions one by one according to the calibration pattern, and divide the hot screen light point image into multiple hot screen images corresponding to multiple partitions one by one; determine the cold screen optical data corresponding to multiple partitions according to the multiple cold screen images; and determine the hot screen optical data corresponding to multiple partitions according to the multiple hot screen images.

[0160] In some embodiments, the plurality of cold screen images include a first image, and the plurality of partitions include a first partition corresponding to the first image; the plurality of hot screen images include a second image, and the plurality of partitions include a second partition corresponding to the second image; the thermal compensation coefficient acquisition module 803 may be specifically used to: determine the correspondence between the light points in the first partition and the pixels in the first image based on the light point arrangement information of the first partition; determine the cold screen optical data corresponding to the light points in the first partition based on the correspondence between the light points in the first partition and the pixels in the first image; and determine the correspondence between the light points in the second partition and the pixels in the second image based on the light point arrangement information of the second partition; and determine the hot screen optical data corresponding to the light points in the second partition based on the correspondence between the light points in the second partition and the pixels in the second image.

[0161] In some embodiments, the thermal compensation coefficient acquisition module 803 may be specifically used to: sample the first image according to the lamp layout information of the first partition, so that the pixels in the sampled image correspond one-to-one with the lamps in the first partition.

[0162] In some embodiments, the thermal compensation coefficient acquisition module 803 may be specifically used to: sample the second image according to the lamp layout information of the second partition, so that the pixels in the sampled image correspond one-to-one with the lamps in the second partition.

[0163] In some embodiments, the above-described apparatus 800 may further include a transformation module for: performing perspective transformation on cold screen light spot images and / or hot screen light spot images to correct the shape of the light spot images to a rectangle.

[0164] In some embodiments, the device 800 may further include a display module for: presenting indication information on the image preview interface of the camera, the indication information being used to indicate the minimum size of the preview image of the light spot image.

[0165] In some embodiments, the indication information includes a rectangular area displayed on the image preview interface, and the indication information is used to indicate that the minimum size of the preview image needs to be greater than the size corresponding to the rectangular area.

[0166] In some embodiments, the lamp arrangement information may be resolution information.

[0167] In some embodiments, the cold screen optical data and the hot screen optical data are optical information, which may include one or more of the following: luminous flux information, brightness information, and chromaticity information.

[0168] In some embodiments, the light image may include one or more of a blue light image, a red light image, a green light image, and a mixed color image.

[0169] In some embodiments, the cold screen image acquisition module 801 can be specifically used to: acquire a cold screen light spot image when the target display area presents a pattern of the target color; the hot screen image acquisition module 802 can be specifically used to: after the target display area presents a mixed color pattern and reaches the hot screen state, acquire a hot screen light spot image when the target display area presents a pattern of the target color.

[0170] In some embodiments, the display screen is an LED display screen, and the light points within the target display area are LED pixel lights.

[0171] Figure 9 This is a schematic diagram of the structure of a terminal device provided in another embodiment of this application. Figure 9 The terminal device 9 may include a memory 91 and a processor 92.

[0172] In some implementations, memory 91 may be used to store computer programs. Processor 92 may be used to execute the computer programs stored in memory to perform tasks such as... Figure 7 The method shown. For example, the terminal device may refer to the thermal compensation and correction unit 23 in the aforementioned thermal compensation and correction system 20.

[0173] In other embodiments, memory 91 can be used to store the thermal compensation coefficients obtained by the aforementioned thermal compensation correction method. Processor 92 can be used to perform thermal compensation correction on the display screen based on the thermal compensation coefficients. For example, the terminal device may refer to the display screen control device 21 in the aforementioned thermal compensation correction system 20.

[0174] It should be understood that in the various embodiments of this application, the order of the above-mentioned processes does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0175] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0176] The units described as separate components may or may not be physically separate. 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 the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0177] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0178] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can read, or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., digital video disc (DVD)), or a semiconductor medium (e.g., solid-state disk (SSD)).

[0179] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A thermal compensation correction method, characterized in that, include: The target display area of ​​the control screen is lit up point by point in a cold screen state, wherein the target display area is part or all of the display area of ​​the screen; The acquisition parameters of the acquisition device are adjusted so that the images of at least some of the light points in the target display area are in a stuck state. After the acquisition parameters are adjusted, the acquisition device is controlled to take a picture of the target display area to obtain a cold screen light point image of the target display area, wherein at least some of the light points in the cold screen light point image are in a sticky state. When the target display area reaches the hot screen state, the acquisition device is controlled to take a picture of the target display area to obtain a hot screen light point image of the target display area. At least some of the light points in the hot screen light point image are in a sticky state. The target display area is controlled to display a calibration pattern, which is used to divide the target display area into multiple partitions; The acquisition device is controlled to capture images of the target display area to obtain a calibration image of the target display area; Based on the calibration image, the cold screen light spot image, and the hot screen light spot image, a thermal compensation coefficient is obtained, which is used to perform data conversion between the cold screen state and the hot screen state. Wherein, the imaging of the light points is in an adhered state, including: the imaging of adjacent light points within the target display area is in an adjacent or overlapping state; and / or the degree of overlap of the imaging of adjacent light points within the target display area in the cold screen light point image is between 10% and 80%; and / or the degree of overlap of the imaging of adjacent light points within the target display area in the hot screen light point image is between 10% and 80%; and / or the difference between the maximum and minimum brightness in the cold screen light point image is between 10% and 50%; and / or, the The difference between the maximum and minimum brightness in the hot screen light spot image is between 10% and 50%; and / or, the difference between the maximum and minimum grayscale in the cold screen light spot image is between 10% and 50%; and / or, the difference between the maximum and minimum grayscale in the hot screen light spot image is between 10% and 50%; and / or, the difference between the maximum and minimum DN value in the cold screen light spot image is between 10% and 50%; and / or, the difference between the maximum and minimum DN value in the hot screen light spot image is between 10% and 50%.

2. The thermal compensation and correction method as described in claim 1, characterized in that, The step of obtaining the thermal compensation coefficient based on the calibration image, the cold screen light point image, and the hot screen light point image includes: Based on the calibration image and the cold screen light spot image, the cold screen optical data is obtained; Based on the calibration image and the hot screen light spot image, the hot screen optical data is obtained; The thermal compensation coefficient is obtained based on the cold screen optical data and the hot screen optical data.

3. The thermal compensation correction method as described in claim 1, characterized in that, The target display area of ​​the control display screen is illuminated point by point in a cold screen state, including: The control mechanism ensures that the target display area displays a pattern of the target color in the cold screen state. After the acquisition parameters are adjusted, the acquisition device is controlled to capture an image of the target display area to obtain a cold screen light point image of the target display area, including: After the acquisition parameters are adjusted, the acquisition device is controlled to take a picture of the target display area to obtain a cold screen light point image of the target display area under the target color; The step of controlling the acquisition device to capture an image of the target display area when the target display area reaches a hot-screen state, thereby obtaining an image of the hot-screen light points of the target display area, includes: The target display area is controlled to display a pattern of mixed colors, so that the target display area reaches a hot screen state; When the target display area reaches the hot screen state, the target display area is controlled to display a pattern of the target color in the hot screen state, and the acquisition device is controlled to take a picture of the target display area to obtain a hot screen light point image of the target display area under the target color.

4. The thermal compensation and correction method as described in claim 1, characterized in that, The cold screen light dot image includes a first light dot image and a second light dot image, the first light dot image and the second light dot image corresponding to light dots of different colors in the target display area; the hot screen light dot image includes a third light dot image corresponding to the first light dot image and a fourth light dot image corresponding to the second light dot image; the calibration image includes a first calibration image corresponding to the first light dot image and a second calibration image corresponding to the second light dot image, the first calibration image and the second calibration image being different.

5. The thermal compensation correction method as described in claim 2, characterized in that, The step of obtaining cold screen optical data based on the calibration image and the cold screen light spot image includes: Based on the calibration image, the cold screen light point image is divided into multiple cold screen images that correspond one-to-one with the multiple partitions; Based on the multiple cold screen images, determine the cold screen optical data corresponding to each of the multiple partitions; The step of obtaining hot screen optical data based on the calibration image and the hot screen light point image includes: Based on the calibration image, the hot screen light point image is divided into multiple hot screen images that correspond one-to-one with the multiple partitions; Based on the multiple hot screen images, determine the hot screen optical data corresponding to each of the multiple partitions; The step of obtaining the thermal compensation coefficient based on the cold screen optical data and the hot screen optical data includes: The thermal compensation coefficient is obtained based on the cold screen optical data and hot screen optical data corresponding to the multiple partitions respectively.

6. The thermal compensation correction method according to any one of claims 1 to 5, characterized in that, The step of adjusting the acquisition parameters of the acquisition device so that at least some of the light points within the target display area are in a state of image adhesion includes: The acquisition parameters of the acquisition device are adjusted so that the imaging of at least some of the light points in the target display area diverges or contracts until the imaging of the light points is in a state of adhesion. The acquisition parameters include at least one of aperture, exposure time, and macro.

7. A thermal compensation and correction system, characterized in that, include: A display screen control device is used to control the target display area of ​​the display screen to light up point by point in a cold screen state, wherein the target display area is part or all of the display area of ​​the display screen; An acquisition device is used to acquire images of the target display area, wherein at least some of the light points within the target display area are in a state of overlap. The device is also used to capture images of the target display area to obtain a cold-screen light point image of the target display area, wherein at least some of the light points in the cold-screen light point image are in a state of overlap. Furthermore, when the target display area reaches a hot-screen state, the acquisition device is controlled to capture images of the target display area to obtain a hot-screen light point image of the target display area, wherein at least some of the light points in the hot-screen light point image are in a state of overlap. The overlapping state of the light point images includes: the images of adjacent light points within the target display area are in a state of adjacency or overlap; and / or the degree of overlap of the images of adjacent light points within the target display area in the cold-screen light point image is uniform. The overlap between 10% and 80% is between 10% and 80%; and / or, the overlap between adjacent light points within the target display area in the hot screen light point image is between 10% and 80%; and / or, the difference between the maximum and minimum brightness in the cold screen light point image is between 10% and 50%; and / or, the difference between the maximum and minimum brightness in the hot screen light point image is between 10% and 50%; and / or, the difference between the maximum and minimum grayscale in the cold screen light point image is between 10% and 50%; and / or, the difference between the maximum and minimum DN value in the cold screen light point image is between 10% and 50%; and / or, the difference between the maximum and minimum DN value in the hot screen light point image is between 10% and 50%. The display control device is also used to: control the target display area to display a calibration pattern, the calibration pattern being used to divide the target display area into multiple partitions; the acquisition device is also used to capture images of the target display area to obtain a calibration image of the target display area; A thermal compensation correction unit is used to obtain a thermal compensation coefficient based on the calibration image, the cold screen light spot image, and the hot screen light spot image. The thermal compensation coefficient is used to perform data conversion between the cold screen state and the hot screen state.

8. A thermal compensation correction method, characterized in that, include: The image of the target display area of ​​the display screen is obtained by lighting up the cold screen points one by one in a cold screen state, wherein the target display area is part or all of the display area of ​​the display screen, and at least some of the points in the cold screen light point image are in a sticky state. Acquire hot screen light point images of the target display area in hot screen state, wherein at least some light points in the hot screen light point images are in a sticky state. Obtain a calibration image of the target display area; the calibration image is used to divide the target display area into multiple partitions; Based on the calibration image, the cold screen light spot image, and the hot screen light spot image, a thermal compensation coefficient is obtained, which is used to perform data conversion between the cold screen state and the hot screen state. Wherein, the imaging of the light points is in an adhered state, including: the imaging of adjacent light points within the target display area is in an adjacent or overlapping state; and / or the degree of overlap of the imaging of adjacent light points within the target display area in the cold screen light point image is between 10% and 80%; and / or the degree of overlap of the imaging of adjacent light points within the target display area in the hot screen light point image is between 10% and 80%; and / or the difference between the maximum and minimum brightness in the cold screen light point image is between 10% and 50%; and / or, the The difference between the maximum and minimum brightness in the hot screen light spot image is between 10% and 50%; and / or, the difference between the maximum and minimum grayscale in the cold screen light spot image is between 10% and 50%; and / or, the difference between the maximum and minimum grayscale in the hot screen light spot image is between 10% and 50%; and / or, the difference between the maximum and minimum DN value in the cold screen light spot image is between 10% and 50%; and / or, the difference between the maximum and minimum DN value in the hot screen light spot image is between 10% and 50%.

9. The thermal compensation correction method as described in claim 8, characterized in that, The step of obtaining the thermal compensation coefficient based on the calibration image, the cold screen light point image, and the hot screen light point image includes: Based on the calibration image and the cold screen light spot image, the cold screen optical data is obtained; Based on the calibration image and the hot screen light spot image, the hot screen optical data is obtained; The thermal compensation coefficient is obtained based on the cold screen optical data and the hot screen optical data.

10. The thermal compensation correction method as described in claim 8, characterized in that, The cold screen light point image and the hot screen light point image include one or more of the following: blue light image, red light image, green light image, and mixed color image.

11. The thermal compensation correction method as described in claim 8, characterized in that, The acquisition of the image of the target display area of ​​the display screen being illuminated point by point in a cold screen state includes: Acquire an image of the cold screen light points when the target display area displays a pattern of the target color; The step of acquiring the hot screen light point image of the target display area in hot screen state includes: After the target display area presents a mixed color pattern and reaches the hot screen state, the hot screen light spot image is obtained when the target display area presents the target color pattern.

12. A terminal device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the thermal compensation correction method as described in any one of claims 8 to 11.

13. A display screen control device, characterized in that, The display screen control device includes: A memory for storing the thermal compensation coefficients obtained by the thermal compensation correction method according to any one of claims 8 to 11; The processor is used to perform thermal compensation correction on the display screen according to the thermal compensation coefficient.

Images