Screen control method, device, display device, apparatus and medium

Abstract

The screen control method, device, display device, equipment and medium provided by the present disclosure belong to the technical field of display screens. The method is applied to a controller of a MiniLED screen and includes the following steps: acquiring the temperature and gray scale of the screen; confirming that the screen has residual images when the temperature exceeds the stable temperature range corresponding to the gray scale; and controlling the screen to adjust the red pixel value according to the temperature to eliminate the residual images.

Description

Technical Field

[0001] This disclosure belongs to the field of display screen technology, and specifically relates to a screen control method, apparatus, display device, equipment and medium. Background Technology

[0002] Mini LED refers to LEDs with a package size of 0.1mm to 0.2mm, also known as sub-millimeter light-emitting diodes. Since the size of Mini LEDs is at the level of hundreds of micrometers, there is no need to overcome the technical hurdle of mass transfer, so its mass production is feasible and it can be used as a light-emitting component for splicing multiple screens into a large-size screen. Summary of the Invention

[0003] This disclosure provides a screen control method, apparatus, display device, equipment, and medium.

[0004] This disclosure provides a screen control method for a controller of a Mini LED screen, the method comprising:

[0005] Obtain the temperature and grayscale of the screen;

[0006] When the temperature exceeds the stable temperature range corresponding to the grayscale, it is confirmed that there is image retention on the screen;

[0007] The screen adjusts the red pixel value according to the temperature to eliminate the ghosting.

[0008] Optionally, controlling the value of the screen compensation red pixel based on the temperature includes:

[0009] Calculate the temperature change based on the temperature and the stable temperature range;

[0010] In the correspondence between the red pixel compensation amounts corresponding to the gray levels, query the red pixel compensation amount corresponding to the temperature change amount;

[0011] The red pixel value of the screen adjustment pixel is controlled according to the red pixel compensation amount.

[0012] Optionally, the temperature includes: the regional temperature of different screen areas in the screen; controlling the red pixel value of the screen adjustment pixels according to the red pixel compensation amount includes:

[0013] The red pixel compensation amount for each pixel in the screen area is calculated based on the temperature diffusion coefficient.

[0014] The red pixel value of each pixel is adjusted according to the corresponding red pixel compensation amount.

[0015] Optionally, the confirming the screen has residual image when the temperature is out of the stable temperature range corresponding to the gray scale comprises:

[0016] acquiring area temperatures of different screen areas in the screen, and calculating area average gray scales of the different screen areas;

[0017] inquiring stable temperature ranges corresponding to the area average gray scales of each of the screen areas;

[0018] confirming that a screen area corresponding to the area temperature has residual image when the area temperature is out of the stable temperature range corresponding to the area average gray scale of the screen area.

[0019] Optionally, the temperature comprises pixel point temperatures of different pixel points in the screen; and the adjusting the red pixel value of the pixel point in the screen according to the red pixel compensation amount comprises:

[0020] adjusting the red pixel value of each of the pixel points according to a red pixel compensation amount corresponding to the pixel point temperature.

[0021] Optionally, the confirming the screen has residual image when the temperature is out of the stable temperature range corresponding to the gray scale comprises:

[0022] calculating pixel point temperatures of different pixel points in the screen according to the temperature and a temperature diffusion coefficient;

[0023] inquiring stable temperature ranges corresponding to pixel gray scales of each of the pixel points;

[0024] confirming that a pixel point corresponding to the pixel point temperature has residual image when the pixel point temperature is out of the stable temperature range corresponding to the pixel gray scale of the pixel point.

[0025] Optionally, the red pixel compensation amount corresponding relationship is obtained through the following steps:

[0026] adjusting the screen in a range of adjustable gray scales;

[0027] adjusting the red pixel value of the screen to eliminate the residual image when the screen has residual image;

[0028] recording the gray scale, the temperature variation amount and the red pixel compensation amount for eliminating residual image of the screen when the screen has residual image;

[0029] establishing a corresponding relationship between the temperature variation amount and the red pixel compensation amount to obtain the red pixel compensation amount corresponding relationship corresponding to the gray scale.

[0030] Optionally, the temperature diffusion coefficient is obtained through the following steps:

[0031] In the case where the screen comprises a plurality of spliced screens, the reference temperature diffusion coefficient is adjusted according to the positional relationship between different spliced screens and the size of the splicing gap, to obtain the temperature diffusion coefficient of each spliced screen, the reference temperature diffusion coefficient being the temperature diffusion coefficient when the spliced screens are not spliced.

[0032] Some embodiments of the present disclosure provide a screen control device applied to a controller of a Mini LED screen, the device comprising:

[0033] An acquisition module configured to acquire the temperature and the gray scale of the screen;

[0034] An identification module configured to confirm that the screen has residual images when the temperature exceeds the stable temperature range corresponding to the gray scale;

[0035] A control module configured to control the screen to adjust the red pixel value to eliminate the residual images according to the temperature.

[0036] Optionally, the control module is further configured to:

[0037] Calculate the temperature variation according to the temperature and the stable temperature range;

[0038] In the red pixel compensation amount corresponding relationship corresponding to the gray scale, query the red pixel compensation amount corresponding to the temperature variation;

[0039] Control the screen to adjust the red pixel value of the pixel point according to the red pixel compensation amount.

[0040] Optionally, the temperature comprises the area temperature of different screen areas in the screen; the control module is further configured to:

[0041] Calculate the red pixel compensation amount of each pixel point in the screen area according to the temperature diffusion coefficient;

[0042] Adjust the red pixel value of each pixel point according to the corresponding red pixel compensation amount.

[0043] Optionally, the identification module is further configured to:

[0044] Acquire the area temperature of different screen areas in the screen, and calculate the area average gray scale of different screen areas;

[0045] Query the stable temperature range corresponding to the area average gray scale of each screen area;

[0046] When the temperature of the region exceeds the stable temperature range corresponding to the average gray scale of the region, it is determined that the screen region corresponding to the temperature of the region has a residual image.

[0047] Optionally, the temperature includes pixel point temperatures of different pixel points in the screen, and the control module is further configured to:

[0048] adjust a red pixel value of each pixel point according to a red pixel compensation amount corresponding to the pixel point temperature of the pixel point.

[0049] Optionally, the identification module is further configured to:

[0050] calculate pixel point temperatures of different pixel points in the screen according to the temperature and a temperature diffusion coefficient;

[0051] query a stable temperature range corresponding to a pixel gray scale of each pixel point;

[0052] When the pixel point temperature exceeds the stable temperature range corresponding to the pixel gray scale, it is determined that the pixel point corresponding to the pixel point temperature has a residual image.

[0053] Optionally, the red pixel compensation amount corresponding relationship is obtained by the following steps:

[0054] adjust the screen in a range of adjustable gray scales;

[0055] adjust a red pixel value of the screen to eliminate the residual image when the screen has a residual image;

[0056] record a gray scale, a temperature variation, and a red pixel compensation amount for eliminating a residual image of the screen when the screen has a residual image;

[0057] establish a corresponding relationship between the temperature variation and the red pixel compensation amount to obtain a red pixel compensation amount corresponding relationship corresponding to the gray scale.

[0058] Optionally, the temperature diffusion coefficient is obtained by the following steps:

[0059] In a case where the screen includes a plurality of spliced screens, a reference temperature diffusion coefficient is adjusted according to a positional relationship between different spliced screens and a size of a spliced gap to obtain a temperature diffusion coefficient of each spliced screen, the reference temperature diffusion coefficient being a temperature diffusion coefficient when the spliced screens are not spliced.

[0060] Some embodiments of the present disclosure provide a display device, comprising a display panel and a controller.

[0061] The display panel is provided with a temperature sensor configured to send a temperature of the display panel to the controller.

[0062] The controller is configured to perform the screen control method described above.

[0063] Some embodiments of the present disclosure provide a computing processing device comprising:

[0064] a memory having computer readable code stored therein;

[0065] one or more processors, the computing processing device being configured to perform the screen control method described above when the computer readable code is executed by the one or more processors.

[0066] Some embodiments of the present disclosure provide a computer program comprising computer readable code which, when run on a computing processing device, causes the computing processing device to perform the screen control method described above.

[0067] Some embodiments of the present disclosure provide a non-transitory computer readable medium having the screen control method described above stored therein.

[0068] The above description is only a summary of the technical solutions of the present disclosure. In order to enable the technical means of the present disclosure to be more clearly understood, and to be implemented according to the content of the description, and in order to enable the above and other purposes, features and advantages of the present disclosure to be more apparent and easy to understand, the specific embodiments of the present disclosure are described below. BRIEF DESCRIPTION OF DRAWINGS

[0069] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the drawings needed in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present disclosure, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0070] Figure 1 The flowchart schematically shows a screen control method provided by some embodiments of the present disclosure;

[0071] Figure 2 The flowchart schematically shows one of another screen control method provided by some embodiments of the present disclosure;

[0072] Figure 3 The flowchart schematically shows another screen control method provided by some embodiments of the present disclosure;

[0073] Figure 4A schematic diagram of a principle of a screen control method provided by some embodiments of the present disclosure is shown schematically;

[0074] Figure 5 A third flowchart of another screen control method provided by some embodiments of the present disclosure is shown schematically;

[0075] Figure 6 A fourth flowchart of another screen control method provided by some embodiments of the present disclosure is shown schematically;

[0076] Figure 7 A structural diagram of a screen control device provided by some embodiments of the present disclosure is shown schematically;

[0077] Figure 8 A block diagram of a computing processing device for executing a method according to some embodiments of the present disclosure is shown schematically;

[0078] Figure 9 A storage unit for holding or carrying program code for implementing a method according to some embodiments of the present disclosure is shown schematically. DETAILED DESCRIPTION

[0079] For the purpose of making the objects, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only some of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present disclosure.

[0080] Mini LED refers to an LED with a packaging size of 0.1mm~0.2mm, also known as sub-millimeter light-emitting diode. Since the size of Mini LED is in the order of hundreds of microns, it does not need to overcome the technical threshold of mass transfer, and therefore its mass production is feasible. It can be used as a light-emitting component for assembling a large-size screen from multiple screens.

[0081] The products applying Mini LED in the related art are mostly PM (Passive Matrix) driven, that is, a matrix is formed by cathodes and anodes, and pixels in the array are lit in a scanning mode. The current of the PM driven is mA level, and the brightness decreases by 5% with every 10℃ increase in temperature. Under the small-pitch brightness variation of 400 nit, the display screen is basically free of residual images. The Mini LED driven by AM (Active Matrix) has a current of uA level, and the luminous efficiency of red pixels decreases sharply with the increase in temperature, that is, the brightness of red pixels decreases by more than 12% with every 10℃ increase in temperature, which results in obvious differences in the brightness of red pixels in different areas of the screen displaying high and low gray scales for a long time.

[0082] Specifically, it is found through research that the red light attenuation of the Mini LED screen is strongly related to temperature. The higher the temperature, the more obvious the red light attenuation, and the more blue the picture. When the temperature is low, the red light attenuation is weak, and the picture is not biased to blue, and is subjectively biased to red compared with the pixels biased to blue. When at least two different areas of the screen have a large difference in the displayed gray scale, and the screens of the two areas are switched to display the same gray scale, red and blue interlaced residual images are generated due to the non-uniform brightness of red pixels in different areas of the screen, which seriously affects the display effect of the screen.

[0083] Figure 1 A flowchart of a screen control method provided by the present disclosure is schematically shown. The method is applied to a controller of a Mini LED screen, and includes the following steps.

[0084] In step 101, the temperature and gray scale of the screen are acquired.

[0085] It should be noted that the execution subject of the present disclosure is a controller of an AM driven Mini LED screen, which is used to execute the steps of the screen control method provided by some embodiments of the present disclosure.

[0086] In the embodiments of the present disclosure, the controller can acquire the gray scale displayed by the screen by analyzing the image signal output to the screen, and the temperature of the screen can be collected by the temperature sensor arranged on the screen and sent to the controller, or monitored by the infrared camera and sent to the controller. Specifically, when the temperature of the screen is collected by the temperature sensor arranged on the screen, a plurality of temperature sensors can be arranged on the screen according to the size of the screen. The more the number of temperature sensors arranged, the higher the density of the arrangement, and the more accurate the temperature of the screen collected. Of course, as long as the real-time temperature of the screen can be acquired, the embodiments of the present disclosure are applicable, and the acquisition method of the temperature of the screen can be set according to actual needs, which is not limited herein.

[0087] Step 102, when the temperature exceeds the stable temperature range corresponding to the gray scale, it is determined that the screen has residual image.

[0088] In the embodiments of the present disclosure, considering that the temperature of the Mini LED screen is different at different gray scales, the temperature at which the pixel brightness of the Mini LED screen is stable and there is no residual image is also different at different gray scales. Further considering that the temperature is usually not maintained at a fixed value, therefore, the present disclosure takes a range interval around the stable temperature of the Mini LED when displaying images of different gray scales to represent whether the brightness of each pixel point in the Mini LED screen is stable, for example, the stable temperature is 42℃ at a certain gray scale, and the stable temperature range can be taken as (42-0.2℃~42+0.2℃), or the stable temperature is 36℃, and the stable temperature range can be taken as (36-0.5℃~36+0.5℃), which can be set according to actual needs, and is not limited here.

[0089] Specifically, if the temperature of a certain pixel point in the screen is higher than the stable temperature range, it means that the red brightness attenuation degree of the pixel point is larger than that of other pixel points, so it is bluish compared with other pixel points, which causes the screen to display residual image; on the contrary, if the temperature of a certain pixel point in the screen is lower than the stable temperature range, it means that the red brightness attenuation degree of the pixel point is smaller than that of other pixel points, so it is reddish compared with other pixel points, which also causes the screen to display residual image. It can be seen that whether the temperature of the Mini LED screen is higher or lower than the stable temperature range, the red brightness of the pixel points in the screen is not uniform, which causes the screen to be bluish and reddish, and thus residual image appears.

[0090] Step 103, adjusting the red pixel value of the screen according to the temperature to eliminate the residual image.

[0091] In the embodiments of the present disclosure, the red light brightness of the pixel of the Mini LED screen under AM driving in the above description is obviously affected by temperature, and the higher the temperature is, the greater the red light brightness attenuation degree is. The present disclosure determines the red light brightness attenuation degree of the pixel point by adapting to the temperature of the screen, so as to adjust the red pixel value of the displayed image of the screen in time by adapting to the attenuation degree, so as to unify the red light brightness of each pixel point in the screen and eliminate the residual image in the screen.

[0092] Specifically, considering that the residual image in the Mini LED screen is caused by the high or low red light brightness of some pixel points, the red pixel value of the pixel point with low red light brightness can be adjusted, or the red pixel value of other pixel points except the pixel point with low red light brightness can be adjusted, or the red pixel value of the pixel point with high red light brightness can be adjusted, or the red pixel value of other pixel points except the pixel point with high red light brightness can be adjusted, and so on. These methods can adjust the red light of each pixel point in the screen to a uniform brightness to eliminate the residual image in the screen. The specific adjustment method can be set according to actual needs, which is not limited here.

[0093] The embodiment of the present disclosure identifies whether there is a residual image caused by the red light attenuation of the pixel point in the screen according to whether the temperature of the Mini LED screen exceeds the stable temperature range corresponding to the displayed gray scale. When the temperature of the screen exceeds the stable temperature range, the red pixel value of the pixel point in the screen is adjusted according to the temperature to adjust the red light brightness, so that the red light brightness of each pixel point in the screen can be kept uniform to eliminate the residual image in the screen.

[0094] Optionally, with reference to Figure 2 , the step 103 comprises:

[0095] Step 1031, calculating a temperature change amount according to the temperature and the stable temperature range.

[0096] In the embodiment of the present disclosure, the exceeding amount of the screen temperature exceeding the stable temperature range, or the numerical distance between the center temperature of the stable temperature range and the screen temperature can be used as the temperature change amount. The specific setting can be made according to actual needs, which is not limited here.

[0097] Step 1032, querying the red pixel compensation amount corresponding to the temperature change amount in the red pixel compensation amount corresponding relationship corresponding to the gray scale.

[0098] In the embodiment of the present disclosure, it is found through research that the temperature change amount of the Mini LED screen switching the displayed gray scale in different ranges is also different, and the red light brightness attenuation degree of the pixel point is also different. Therefore, the embodiment of the present disclosure statistically obtains the temperature change amount and the corresponding red pixel compensation amount under different gray scales according to experiments under different gray scales for different specifications of Mini LED screens, and establishes the corresponding relationship between the temperature change amount and the red pixel compensation amount when the screen switches between different gray scales, so as to obtain the red pixel compensation amount corresponding relationship for the controller to query and use in actual use.

[0099] Assuming that the maximum value of a pixel point of a Mini LED screen is max and the average value is avr, the average gray scale of the pixel point can be calculated as P = a * max + (1-a) * avr, for example, when a is 0.6, the average gray scale is P = 0.6 * max + 0.4 * avr. Of course, only the screens in different RGB spaces will have different relationships between the gray scale and the output pixel value of the screen pixel point due to different specifications. The specific average gray scale calculation formula can be set according to actual needs, which is not limited here.

[0100] For example, in an 8-bit system, the gray scale P ranges from 0 to 255. The most extreme case of residual image usually occurs when the screen switches from a white block with a gray scale of 255 to a black block with a gray scale of 0. It is found through actual measurement that when some pixel points in the Mini LED display a black block with a gray scale of 0 and the remaining pixel points display a white block with a gray scale of 255 for more than 1h, and then all pixel points display a white block with a gray scale of 255, residual image occurs. The red pixel value of the pixel point at the original black block position can be reduced to 246 to eliminate the residual image between the pixel point and the surrounding pixel points. At this time, the maximum compensation range is C = 255-246 = 9. That is, the maximum compensation range of the screen is C = 9. Through actual measurement, the range of the average gray scale is segmented to obtain the corresponding maximum change temperature and the maximum red pixel compensation value as shown in the following table (1):

[0101]

[0102] Table 1

[0103] Of course, the above is only an exemplary description, and the specific red pixel compensation amount corresponding relationship can be determined according to the actual situation of the Mini LED screen in actual use, which is not limited here.

[0104] Step 1033, controlling the screen to adjust the red pixel value of the pixel point according to the red pixel compensation amount.

[0105] In the embodiments of the present disclosure, the controller controls the pixel points in the screen to adjust the red pixel value according to the red pixel compensation amount, so as to efficiently eliminate the residual image of the Mini LED screen caused by the red light brightness decay of the pixel point.

[0106] Optionally, with reference to Figure 3 , the step 102 comprises:

[0107] Step 1021A, acquiring the area temperature of different screen areas in the screen and calculating the area average gray scale of different screen areas.

[0108] In the embodiments of the present disclosure, the controller can acquire the area temperature of each screen area from the temperature sensors arranged in different screen areas of the screen, and calculate the average gray scale of all pixel points in each different screen area.

[0109] In step 1022A, the stable temperature range corresponding to the average gray scale of each screen area is queried.

[0110] In the embodiments of the present disclosure, the controller queries the stable temperature range corresponding to the average gray scale from the pre-set stable temperature range corresponding to different gray scales.

[0111] In step 1023A, when the area temperature exceeds the stable temperature range corresponding to the average gray scale of the screen area, it is determined that the screen area corresponding to the area temperature has residual image.

[0112] In the embodiments of the present disclosure, if the area temperature of the screen area exceeds the stable temperature range corresponding to the average gray scale, it can be determined that there is red brightness attenuation in the screen area, so as to accurately identify the screen area with residual image.

[0113] Optionally, the temperature includes the area temperature of different screen areas in the screen, and the step 1033 includes: Figure 3

[0114] In step 10331A, the red pixel compensation amount of each pixel point in the screen area is calculated according to the temperature diffusion coefficient.

[0115] In the embodiments of the present disclosure, the temperature diffusion coefficient is a coefficient for measuring the numerical relationship between the actual temperature of each pixel point or screen area different from the temperature sensor in the screen and the temperature measured by the temperature sensor. The temperature diffusion coefficient can be measured and calculated by the temperature sensor for temperature measurement of different areas in the screen from the temperature sensor. For example, a Mini LED screen is divided into 9 screen areas of 3x3, and a temperature sensor is arranged in the screen area at the center position, so that the temperature diffusion coefficient corresponding to each screen area can be measured. The temperature diffusion coefficient decreases from the middle position to the edge of the screen. The value range of the temperature diffusion coefficient can be 0-1. Of course, the temperature diffusion coefficient of each pixel point in the screen can also be measured. Here, only an example is described, and the specific temperature diffusion coefficient can be measured according to actual needs, which is not limited here.

[0116] Specifically, considering that the size of the red pixel compensation amount and the temperature are positively correlated, the red pixel compensation amount of each pixel point in the screen area can be calculated and distributed according to the temperature diffusion coefficient.

[0117] ​Step 10332A, adjust the red pixel value of each pixel point according to the corresponding red pixel point compensation amount.

[0118] In the embodiments of the present disclosure, the controller adjusts the red pixel value of each pixel point according to the calculated red pixel point compensation amount corresponding to different pixel points to keep the red light brightness of the pixel points in the screen area consistent, thereby efficiently eliminating the residual image caused by the red light brightness attenuation in the Mini LED screen.

[0119] For example, for a spliced screen composed of 9 Mini LED screens as shown in Figure 4 , the temperature sensor shown by the black dot arranged at the center of each screen area can be used to obtain the area temperature of each screen area, and the average gray scale of all pixel points in each screen area can be calculated in real time. For example, if the average gray scale is 255, the maximum red pixel compensation amount C=9 under this gray scale, which corresponds to a stable temperature of 42℃. Taking 0.2℃ as the threshold, the stable temperature range is (42-0.2℃~42+0.2℃). When the measured temperature of a certain screen area is lower than (42-0.2)℃, it is considered that the display picture of this screen area is reddish, and the red pixel value of the screen area as a whole is reduced. Because the maximum red pixel compensation amount C=9 under the gray scale of 255, according to the actual 3×3 temperature diffusion coefficient, the maximum red pixel compensation amount is dispersed to the corresponding pixel points to eliminate the residual image. When the measured temperature of a certain screen area is higher than (42+0.2)℃, it is considered that the display picture of this screen area is bluish, and the red pixel value should be increased as a whole. Because the maximum compensation value C=9 under the gray scale of 255, according to the actual 3×3 temperature diffusion coefficient, the maximum red pixel compensation amount is dispersed to the corresponding pixel points to eliminate the residual image. Of course, this is only an exemplary description, and the compensation value can be adjusted in real time according to the real-time temperature and the calculated average gray scale, which is not limited herein.

[0120] Optionally, with reference to Figure 5 , the step 102 comprises:

[0121] Step 1021B, calculating the pixel point temperature of different pixel points in the screen according to the temperature and the temperature diffusion coefficient.

[0122] In the embodiments of the present disclosure, similar to the method in Figure 3 , the difference is that the temperature diffusion coefficient in the method shown in Figure 5 is not used to measure the numerical relationship between different screen areas in the screen and the temperature measured by the temperature sensor, but is used to measure the numerical relationship between different pixel points in the screen and the temperature measured by the temperature sensor. Therefore, the controller can calculate the pixel point temperature of different pixel points according to the obtained temperature and the temperature diffusion coefficient.

[0123] Step 1022B, query the stable temperature range corresponding to the pixel gray scale of each pixel point.

[0124] In the embodiments of the present disclosure, the acquired temperature is the pixel point temperature, so the controller can adaptively query the stable temperature range corresponding to the pixel gray scale of each pixel point.

[0125] Step 1023B, when the pixel point temperature exceeds the stable temperature range corresponding to the pixel gray scale, it is determined that the pixel point corresponding to the pixel point temperature has residual image.

[0126] In the embodiments of the present disclosure, when the temperature of a certain pixel point exceeds the stable temperature range corresponding to the pixel gray scale corresponding to the pixel point, it is determined that the pixel point and the nearby pixel points have residual image, so that the position of the pixel point with residual image is accurately identified.

[0127] Optionally, with reference to Figure 5 , the step 1033 comprises:

[0128] Step 10331B, adjusting the red pixel value of each pixel point according to the red pixel compensation amount corresponding to the pixel point temperature.

[0129] This step can refer to the detailed description of step 10331B, which will not be repeated here.

[0130] For example, for a 9-block Mini LED screen, the temperature of the block screen can be measured in real time, and the pixel point temperature of each pixel point in the approximate screen can be calculated according to the actual 3x3 temperature diffusion coefficient. Then adjust the gray scale of each pixel point. For example, the gray scale of a certain pixel point is 255, and the maximum compensation value in the stable state is C=9, which corresponds to a stable temperature of 42℃. Taking 0.2℃ as the threshold, the stable temperature range is (42-0.2℃~42+0.2℃). If the current temperature of this pixel point is lower than (42-0.2)℃, it is considered that the picture near this point is reddish, and the red pixel value of this pixel point should be reduced. If it is measured that the current temperature of this pixel point is higher than (42+0.2)℃, it is considered that the picture near this pixel point is bluish, and the red pixel value of this pixel point should be increased. The maximum red pixel compensation amount is C=9. Through real-time temperature feedback, the pixel is adjusted in real time. Of course, this is only an exemplary description, and the compensation value can be adjusted in real time according to the real-time temperature and the calculated average gray scale, which is not limited here.

[0131] Optionally, the temperature diffusion coefficient is obtained by adjusting a reference temperature diffusion coefficient according to the position relationship between the different spliced screens and the size of the splicing gap, to obtain the temperature diffusion coefficient of each spliced screen, wherein the reference temperature diffusion coefficient is the temperature diffusion coefficient of the screen when it is not spliced.

[0132] In some embodiments of the present disclosure, the temperature diffusion coefficient of each screen in the spliced screen is related to the position of the screen in the spliced screen and the size of the splicing gap between the screens, and therefore cannot be obtained by the reference temperature diffusion coefficient of the single screen when it is not spliced. Therefore, the present disclosure adjusts the reference temperature diffusion coefficient based on the size of the splicing gap between each screen and the position relationship between the screens to adaptively obtain the temperature diffusion coefficient of the screen in actual use. Of course, the temperature diffusion coefficient of each screen in the spliced screen can also be obtained by actual measurement during actual use, which can be set according to actual needs, and is not limited herein.

[0133] Optionally, with reference to Figure 6 , the red pixel compensation amount corresponding relationship is obtained by the following steps:

[0134] Step 201, adjusting the screen in the adjustable gray scale range.

[0135] Step 202, when the screen appears residual image, adjusting the red pixel value of the screen to eliminate the residual image.

[0136] Step 203, recording the gray scale, temperature change amount and red pixel compensation amount for residual image elimination of the screen when the screen appears residual image.

[0137] Step 204, establishing the corresponding relationship between the temperature change amount and the red pixel compensation amount, to obtain the red pixel compensation amount corresponding relationship corresponding to the gray scale.

[0138] In some embodiments of the present disclosure, the red pixel compensation amount corresponding relationship can be that the Mini LED screen is adjusted in the gray scale adjustable range of, for example, 0-255, and the stable temperature of the screen under different gray scales and the temperature at which the residual image appears are recorded, and the residual image is eliminated by adjusting the red pixel value of the screen, and the corresponding red pixel value compensation amount is recorded. Therefore, the corresponding relationship between the temperature change amount and the red pixel compensation amount under different gray scales can be established in advance, so that the red pixel value compensation amount for compensating the screen can be conveniently queried when the screen is actually used, to efficiently eliminate the residual image in the screen.

[0139] The display device provided by the present disclosure comprises a display panel and a controller.

[0140] The display panel is provided with a temperature sensor for sending the temperature of the display panel to the controller.

[0141] The controller is configured to execute the above screen control method.

[0142] The controller in the display device can refer to the related description of the above controller, which will not be described here. The temperature sensor on the display panel is in communication connection with the controller, which can collect the temperature of the display panel in real time and send the temperature information to the controller.

[0143] The embodiments of the present disclosure identify whether there is residual image caused by red light decay of the pixel points in the screen by determining whether the temperature of the Mini LED screen exceeds the stable temperature range corresponding to the displayed gray scale, and adjust the red pixel value of the pixel points in the screen according to the temperature when the temperature of the screen exceeds the stable temperature range, so that the red light brightness of each pixel point in the screen can be kept uniform to eliminate the residual image in the screen.

[0144] Figure 7 The structure schematic diagram of a screen control device 30 provided by the present disclosure is schematically shown, which is applied to the controller of the Mini LED screen, and the device comprises:

[0145] The acquisition module 301 is configured to acquire the temperature and the gray scale of the screen.

[0146] The identification module 302 is configured to confirm that there is residual image in the screen when the temperature exceeds the stable temperature range corresponding to the gray scale.

[0147] The control module 303 is configured to control the screen to adjust the red pixel value according to the temperature to eliminate the residual image.

[0148] Optionally, the control module 303 is further configured to:

[0149] Calculate the temperature variation according to the temperature and the stable temperature range;

[0150] In the red pixel compensation amount corresponding relationship corresponding to the gray scale, query the red pixel compensation amount corresponding to the temperature variation;

[0151] Control the screen to adjust the red pixel value of the pixel points according to the red pixel compensation amount.

[0152] Optionally, the temperature includes the area temperature of different screen areas in the screen; and the control module 303 is further configured to:

[0153] According to the temperature diffusion coefficient, a red pixel compensation amount of each pixel point in the screen area is calculated;

[0154] According to the corresponding red pixel point compensation amount, the red pixel value of each pixel point is adjusted.

[0155] Optionally, the identification module 302 is further configured to:

[0156] Obtain the area temperature of different screen areas in the screen, and calculate the area average gray scale of different screen areas;

[0157] Query the stable temperature range corresponding to the area average gray scale of each screen area;

[0158] When the area temperature exceeds the stable temperature range corresponding to the area average gray scale, it is determined that the screen area corresponding to the area temperature has residual image.

[0159] Optionally, the temperature includes: pixel point temperature of different pixel points in the screen; the control module 303 is further configured to:

[0160] According to the red pixel compensation amount corresponding to the pixel point temperature, the red pixel value of each pixel point is adjusted.

[0161] Optionally, the identification module 302 is further configured to:

[0162] According to the temperature and the temperature diffusion coefficient, the pixel point temperature of different pixel points in the screen is calculated;

[0163] Query the stable temperature range corresponding to the pixel gray scale of each pixel point;

[0164] When the pixel point temperature exceeds the stable temperature range corresponding to the pixel gray scale, it is determined that the pixel point corresponding to the pixel point temperature has residual image.

[0165] Optionally, the red pixel compensation amount corresponding relationship is obtained by the following steps:

[0166] Adjust the screen in the adjustable gray scale range;

[0167] When the screen has residual image, the red pixel value of the screen is adjusted to eliminate the residual image;

[0168] Record the gray scale, temperature change amount when the screen has residual image, and the red pixel compensation amount for residual image elimination of the screen;

[0169] Establish the corresponding relationship between the temperature change amount and the red pixel compensation amount, and obtain the red pixel compensation amount corresponding relationship corresponding to the gray scale.

[0170] Optionally, the temperature diffusion coefficient is obtained by the following steps:

[0171] In the case where the screen comprises a plurality of spliced screens, the reference temperature diffusion coefficient is adjusted according to the positional relationship between different spliced screens and the size of the spliced gap to obtain the temperature diffusion coefficient of each spliced screen, wherein the reference temperature diffusion coefficient is the temperature diffusion coefficient when the spliced screen is not spliced.

[0172] The embodiments of the present disclosure identify whether there is residual image caused by red light decay of the pixel points in the screen by determining whether the temperature of the Mini LED screen exceeds the stable temperature range corresponding to the displayed gray scale, and adjust the red pixel value of the pixel points in the screen according to the temperature when the temperature of the screen exceeds the stable temperature range to adjust the red light brightness, so that the red light brightness of each pixel point in the screen can be kept uniform to eliminate the residual image in the screen.

[0173] The various component embodiments of the present disclosure can be implemented in hardware, or implemented in software modules running on one or more processors, or implemented in a combination thereof. Those skilled in the art should understand that microprocessors or digital signal processors (DSPs) can be used in practice to implement some or all of the functions of some or all of the components in the computing processing device according to the embodiments of the present disclosure. The present disclosure can also be implemented as a device or apparatus program (e.g., a computer program and a computer program product) for executing part or all of the methods described herein. The program implementing the present disclosure can be stored on a non-transitory computer readable medium or can have the form of one or more signals. Such signals can be downloaded from an Internet website, or provided on a carrier signal, or provided in any other form.

[0174] For example, Figure 8A computing processing device is shown in which the method according to the present disclosure can be implemented. The computing processing device traditionally comprises a processor 410 and a computer program product or non-transitory computer readable medium in the form of a memory 420. The memory 420 can be an electronic memory such as a flash memory, EEPROM (Electrically Erasable Programmable Read-Only Memory), EPROM, hard disk or ROM. The memory 420 has a storage space 430 for program code 431 for performing any of the method steps in the above described methods. For example, the storage space 430 for program code can comprise individual program codes 431 for implementing the various steps in the above methods, respectively. These program codes can be read from or written to one or more computer program products. These computer program products include program code carriers such as hard disks, compact disks (CDs), memory cards or floppy disks. Such computer program products are typically portable or stationary memory units as referred to in Figure 9 Figure 8 The storage unit can have a storage section, storage space, etc. arranged similarly to the memory 420 in the computing processing device of

[0175] It should be understood that although the individual steps in the flowcharts of the drawings are shown in sequence following the direction of the arrows, the steps are not necessarily executed in the order of the arrows. Unless explicitly stated otherwise in the text, the execution of the steps is not strictly limited in sequence and they can be executed in other orders. Furthermore, at least some of the steps in the flowcharts of the drawings can comprise a plurality of sub-steps or stages, which are not necessarily executed at the same time but at different times and which are not necessarily executed sequentially but can be executed in rotation or alternation with at least some of the other steps or sub-steps or stages of other steps.

[0176] The term "one embodiment", "an embodiment" or "one or more embodiments" as referred to herein means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the disclosure. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment.

[0177] ​In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the disclosure can be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

[0178] In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word 'comprising' does not exclude the presence of elements or steps other than those listed in a claim. The word 'a' or 'an' preceding an element does not exclude the presence of a plurality of such elements. The disclosure can be implemented by means of both hardware and software, and any combination thereof. In a unitary claim, several devices, apparatuses or means can be listed, comprising means for carrying out a certain task. The use of the term'means' in a claim is intended to refer to a combination of means for performing a task, even if such means are not explicitly recited in the claim. The word 'first','second', 'third', etc. do not imply any order. The terms 'first','second', 'third', etc. are to be interpreted according to the context in which they are used.

[0179] It has to be noted that the above-mentioned embodiments illustrate rather than limit the application, since various modifications are possible within the scope of the appended claims. As such, the particular embodiments provided are meant to be illustrative only and not meant to be limiting as to the scope of the disclosure.

Claims

1. A screen control method characterized by, The method applied to a controller of a Mini LED screen comprises: obtaining the temperature and the gray scale of the screen; when the temperature exceeds the stable temperature range corresponding to the gray scale, confirming that the screen has residual image; controlling the screen to adjust the red pixel value according to the temperature to eliminate the residual image; the step of controlling the screen to compensate the value of the red pixel according to the temperature comprises: calculating the temperature variation according to the temperature and the stable temperature range; in the red pixel compensation amount corresponding relationship corresponding to the gray scale, querying the red pixel compensation amount corresponding to the temperature variation; controlling the screen to adjust the red pixel value of the pixel point according to the red pixel compensation amount; the temperature comprises the area temperature of different screen areas in the screen; the step of controlling the screen to adjust the red pixel value of the pixel point according to the red pixel compensation amount comprises: calculating the red pixel compensation amount of each pixel point in the screen area according to the temperature diffusion coefficient; adjusting the red pixel value of each pixel point according to the corresponding red pixel compensation amount.

2. The method of claim 1, wherein, the step of confirming that the screen has residual image when the temperature exceeds the stable temperature range corresponding to the gray scale comprises: obtaining the area temperature of different screen areas in the screen and calculating the area average gray scale of different screen areas; querying the stable temperature range corresponding to the area average gray scale of each screen area; when the area temperature exceeds the stable temperature range corresponding to the area average gray scale, confirming that the screen area corresponding to the area temperature has residual image.

3. The method of claim 1, wherein, the temperature comprises the pixel point temperature of different pixel points in the screen; the step of controlling the screen to adjust the red pixel value of the pixel point according to the red pixel compensation amount comprises: adjusting the red pixel value of each pixel point according to the red pixel compensation amount corresponding to the pixel point temperature.

4. The method of claim 3, wherein, the step of confirming that the screen has residual image when the temperature exceeds the stable temperature range corresponding to the gray scale comprises: calculating the pixel point temperature of different pixel points in the screen according to the temperature and the temperature diffusion coefficient; querying the stable temperature range corresponding to the pixel gray scale of each pixel point; when the pixel point temperature exceeds the stable temperature range corresponding to the pixel gray scale, confirming that the pixel point corresponding to the pixel point temperature has residual image.

5. The method of claim 1, wherein, the red pixel compensation amount corresponding relationship is obtained by the following steps: adjusting the screen in the adjustable gray scale range; when the screen has residual image, adjusting the red pixel value of the screen to eliminate the residual image; recording the gray scale, temperature variation and red pixel compensation amount for residual image elimination of the screen when the screen has residual image; establishing the corresponding relationship between the temperature variation and the red pixel compensation amount to obtain the red pixel compensation amount corresponding relationship corresponding to the gray scale.

6. The method of claim 4, wherein, the temperature diffusion coefficient is obtained by the following steps: In the case where the screen comprises a plurality of spliced screens, the reference temperature diffusion coefficient is adjusted according to the positional relationship between different spliced screens and the size of the splicing gap, to obtain the temperature diffusion coefficient of each spliced screen, the reference temperature diffusion coefficient being the temperature diffusion coefficient when the spliced screen is not spliced.

7. A screen control device, characterized by The controller applied to the Mini LED screen comprises: An acquisition module configured to acquire the temperature and gray scale of the screen; An identification module configured to confirm that the screen has residual images when the temperature exceeds the stable temperature range corresponding to the gray scale; A control module configured to control the screen to adjust the red pixel value according to the temperature, so as to eliminate the residual images; The control module is further configured to: Calculate the temperature variation according to the temperature and the stable temperature range; In the red pixel compensation amount corresponding relationship corresponding to the gray scale, query the red pixel compensation amount corresponding to the temperature variation; Control the screen to adjust the red pixel value of the pixel point according to the red pixel compensation amount. The temperature comprises the area temperature of different screen areas in the screen. The control module is further configured to: Calculate the red pixel compensation amount of each pixel point in the screen area according to the temperature diffusion coefficient; Adjust the red pixel value of each pixel point according to the corresponding red pixel compensation amount.

8. A display device, characterized by comprising: Comprise: A display panel and a controller; A temperature sensor is arranged on the display panel, and the temperature sensor is used to send the temperature of the display panel to the controller; The controller is used to execute the screen control method in any one of claims 1-6.

9. A computing processing device, comprising: Comprise: A memory, wherein computer readable code is stored; One or more processors, when the computer readable code is executed by the one or more processors, the computing processing device executes the screen control method as claimed in any one of claims 1-6.

10. A computer program, characterized in that, Comprise computer readable code, when the computer readable code runs on a computing processing device, causes the computing processing device to execute the screen control method as claimed in any one of claims 1-6.

11. A non-transitory computer-readable medium, comprising: The computer program in which the screen control method as claimed in any one of claims 1-6 is stored.

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