Brightness and chromaticity correction data acquisition method of LED display screen and LED display screen

Abstract

The embodiment of the invention relates to the technical field of LED display, and discloses a brightness and chromaticity correction data acquisition method of an LED display screen and the LED display screen, and the correction data acquisition method can acquire first brightness / chromaticity information and second brightness / chromaticity information of each LED lamp in the LED display screen in a cold screen state and a heat screen state respectively. The first brightness / chrominance information and the second brightness / chrominance information are acquired, and brightness / chrominance correction data of the same batch of LED display screens are generated based on the first brightness / chrominance information and the second brightness / chrominance information. The correction data can be obtained only by collecting the brightness / chrominance information of each LED and the like in the cold screen state and the heat screen state, the correction process is simple, manual correction is not needed in the whole process, the correction process is rapid, and the labor cost is low.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of LED display technology, and in particular to a method for acquiring brightness and chromaticity correction data of an LED display screen and an LED display screen. Background Art

[0002] LED display is an electronic display composed of LED dot matrix, which can display different contents by controlling the on and off of red, green and blue lamp beads. After the LED display is started, the screen temperature will gradually increase. As the temperature rises, the brightness and color of the LED lamp beads will decay.

[0003] The inventors have found that there are at least the following problems in the above-mentioned related technologies: the current brightness and chromaticity correction of LED display screens usually requires calibration of each LED display screen, and the LED display screen needs to be preheated before calibration, and special cameras and personnel are required for calibration to obtain the calibration data of the LED display screen. The calibration process is relatively complicated and the labor cost is also high. Summary of the invention

[0004] The embodiments of the present application provide a method for acquiring brightness and chromaticity correction data of an LED display screen and an LED display screen.

[0005] The purpose of the embodiment of the present invention is achieved through the following technical solutions:

[0006] To solve the above technical problems, in a first aspect, an embodiment of the present invention provides a method for acquiring brightness correction data of an LED display screen, comprising: collecting first brightness information of each LED lamp in the LED display screen in a cold screen state; controlling the LED display screen to heat up and collecting second brightness information of each LED lamp in the LED display screen in a hot screen state; and generating brightness correction data of the same batch of LED display screens based on the first brightness information and the second brightness information.

[0007] In some embodiments, collecting the first brightness information of each LED lamp in the LED display screen in the cold screen state includes: turning on the power of the LED display screen, and collecting the first brightness information of each LED lamp after the display signal of the LED display screen is stable.

[0008] In some embodiments, controlling the temperature of the LED display screen to increase and collecting the second brightness information of each LED lamp in the LED display screen in a hot screen state includes: controlling the LED display screen to display a white screen so that the LED display screen is heated to a preset normal use temperature; and collecting the second brightness information of each LED lamp after reaching the preset normal use temperature.

[0009] In some embodiments, the brightness correction data of the same batch of LED display screens is generated based on the first brightness information and the second brightness information, including: calculating the brightness variation coefficient of each LED lamp according to the first brightness information and the second brightness information; arranging the brightness variation coefficients in ascending or descending order; setting the brightness error range ratio of the hot screen and the cold screen according to the first brightness information and the second brightness information; determining the brightness proportion coefficient according to the sorted brightness variation coefficient and the brightness error range ratio; determining the brightness correction coefficient of each LED lamp according to the brightness proportion coefficient and the brightness variation coefficient; and obtaining the brightness correction data of the same batch of LED display screens based on the brightness correction coefficient of each LED lamp in the simulation box of each LED display screen.

[0010] In some embodiments, the method further includes: lighting up the LED display screen, adjusting parameters of the image acquisition device according to the current brightness to complete the pre-correction operation; and turning off the power of the LED display screen to allow the LED display screen to completely cool down to room temperature.

[0011] To solve the above technical problems, in a second aspect, an embodiment of the present invention provides a method for acquiring chromaticity correction data of an LED display screen, comprising: collecting first chromaticity information of each LED lamp in the LED display screen in a cold screen state; controlling the temperature of the LED display screen to rise and collecting second chromaticity information of each LED lamp in the LED display screen in a hot screen state; and generating chromaticity correction data of the same batch of LED display screens based on the first chromaticity information and the second chromaticity information.

[0012] In some embodiments, collecting the first chromaticity information of each LED lamp in the LED display screen in the cold screen state includes: turning on the power of the LED display screen, and collecting the first chromaticity information of each LED lamp after the display signal of the LED display screen is stable.

[0013] In some embodiments, controlling the LED display screen to heat up and collecting the second chromaticity information of each LED lamp in the LED display screen in a hot screen state includes: controlling the LED display screen to display a white screen so that the LED display screen is heated to a preset normal use temperature; and collecting the second chromaticity information of each LED lamp after reaching the preset normal use temperature.

[0014] In some embodiments, the chromaticity correction data of the same batch of LED display screens is generated based on the first chromaticity information and the second chromaticity information, including: calculating the chromaticity variation coefficient of each LED lamp according to the first chromaticity information and the second chromaticity information; arranging the chromaticity variation coefficients in ascending or descending order; setting the chromaticity error range ratio of the hot screen and the cold screen according to the first chromaticity information and the second chromaticity information; determining the chromaticity proportion coefficient according to the sorted chromaticity variation coefficient and the chromaticity error range ratio; determining the chromaticity correction coefficient of each LED lamp according to the chromaticity proportion coefficient and the chromaticity variation coefficient; and obtaining the chromaticity correction data of the same batch of LED display screens based on the chromaticity correction coefficient of each LED lamp in the simulation box of each LED display screen.

[0015] In some embodiments, the method further includes: lighting up the LED display screen, adjusting parameters of the image acquisition device according to the current chromaticity to complete the pre-correction operation; and turning off the power of the LED display screen to allow the LED display screen to completely cool down to room temperature.

[0016] To solve the above technical problems, in the third aspect, an embodiment of the present invention provides an LED display screen, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the method described in the first aspect or the second aspect above.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: Different from the prior art, an embodiment of the present invention provides a method for acquiring brightness and chromaticity correction data of an LED display screen and an LED display screen, the correction data acquisition method can collect the first brightness / chromaticity information and the second brightness / chromaticity information of each LED lamp in the LED display screen in a cold screen state and a hot screen state respectively, and based on the first brightness / chromaticity information and the second brightness / chromaticity information, generate brightness / chromaticity correction data of the same batch of LED display screens, the correction data acquisition method provided by the embodiment of the present invention can obtain a set of brightness / chromaticity correction data common to the same batch of LED display screens, and only needs to collect the brightness / chromaticity information of each LED in the cold screen state and the hot screen state to obtain the correction data, the correction process is simple, and no manual correction is required throughout the process, the correction process is fast, and the labor cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements / modules and steps with the same reference numerals in the drawings are represented as similar elements / modules and steps. Unless otherwise specified, the figures in the drawings do not constitute proportional limitations.

[0019] Figure 1 It is a flow chart of a method for acquiring brightness correction data of an LED display screen provided in Embodiment 1 of the present invention;

[0020] Figure 2 It is a flow chart of another method for acquiring brightness correction data of an LED display screen provided in Embodiment 1 of the present invention;

[0021] Figure 3 yes Figure 1 A schematic diagram of a sub-process of step S120 in the brightness correction data acquisition method shown;

[0022] Figure 4 This is an example of the distribution of heat generating components in a simulated box of an LED display screen provided by an embodiment of the present invention;

[0023] Figure 5 yes Figure 1 A schematic diagram of a sub-process of step S130 in the brightness correction data acquisition method shown;

[0024] Figure 6 It is a flow chart of a method for acquiring chromaticity correction data of an LED display screen provided in the second embodiment of the present invention;

[0025] Figure 7 It is a flow chart of another method for acquiring chromaticity correction data of an LED display screen provided in Embodiment 2 of the present invention;

[0026] Figure 8 yes Figure 6 A schematic diagram of a sub-process of step S220 in the method for obtaining chromaticity correction data is shown;

[0027] Fig. 9 yes Figure 6 A schematic diagram of a sub-process of step S230 in the method for obtaining chromaticity correction data is shown;

[0028] Fig.10 It is a structural schematic diagram of an LED display screen provided in Embodiment 3 of the present invention. DETAILED DESCRIPTION

[0029] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several variations and improvements may be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0030] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0031] It should be noted that, if there is no conflict, the various features in the embodiments of the present invention can be combined with each other, all within the scope of protection of this application. In addition, although the functional modules are divided in the device schematic diagram and the logical order is shown in the flow chart, in some cases, the steps shown or described may be performed in a sequence different from the module division in the device or the flow chart. In addition, the words "first", "second", etc. used herein do not limit the data and execution order, but only distinguish the same items or similar items with basically the same functions and effects.

[0032] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in this specification and in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0033] In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0034] In order to solve the problems that in the existing LED display screen calibration method, each LED display screen needs to be preheated before calibration when obtaining calibration data, and the calibration experimental environment has strict requirements and high costs, the embodiments of the present invention provide a method for obtaining brightness and chromaticity correction data of an LED display screen and an LED display screen, by collecting the brightness / chromaticity of LED lights in both cold screen and hot screen conditions, the brightness / chromaticity correction data of each box in the LED display screen is obtained.

[0035] Specifically, the embodiments of the present invention are further described below in conjunction with the accompanying drawings.

[0036] Embodiment 1

[0037] The embodiment of the present invention provides a method for obtaining brightness correction data of an LED display screen, see Figure 1 , which shows the process of a method for obtaining brightness correction data of an LED display screen provided by an embodiment of the present invention, and the brightness correction data obtaining method includes but is not limited to the following steps:

[0038] Step S110: collecting first brightness information of each LED lamp in the LED display screen in a cold screen state;

[0039] In an embodiment of the present invention, first, the brightness of each LED lamp in the LED display screen in the cold screen state is collected. Specifically, the collecting of the first brightness information of each LED lamp in the LED display screen in the cold screen state includes: turning on the power of the LED display screen, and collecting the first brightness information of each LED lamp after the display signal of the LED display screen is stable. Among them, the cold screen state is a state when the LED display screen displays a white screen and the white temperature is greater than 9300k. Each LED lamp includes three colors of LED lamp beads: red R, green G, and blue B. After the display signal is stable, the first brightness information of the three colors of LED lamp beads: red R, green G, and blue B needs to be collected, that is, the first brightness information of the red LED lamp bead can be recorded as B1r(x,y), the first brightness information of the green LED lamp bead can be recorded as B1g(x,y), and the first brightness information of the blue LED lamp bead can be recorded as B1l(x,y), and (x,y) is the position coordinate of the LED lamp bead in the LED display screen.

[0040] For further information, see Figure 2 , which shows the process of another method for acquiring brightness correction data of an LED display screen provided by an embodiment of the present invention. Before collecting the first brightness information of each LED lamp in the LED display screen in the cold screen state, that is, before step S110, the method further includes:

[0041] Step S101: Light up the LED display screen, and adjust the parameters of the image acquisition device according to the current brightness to complete the pre-calibration operation;

[0042] Step S102: Turn off the power of the LED display screen to allow the LED display screen to completely cool down to room temperature.

[0043] In the embodiment of the present invention, it is also necessary to pre-adjust the pre-operation before the correction. Specifically, it is necessary to control the normal lighting of the LED display screen, and adjust the various parameters of the image acquisition device according to the current brightness, prepare all the pre-operations before collecting the correction data, and then turn off the power of the LED display screen, let the LED display screen completely cool to room temperature, and then turn on the LED display screen in the cold screen state to detect the first brightness information. The image acquisition device can be an image acquisition device such as a camera that can capture the display effect of the LED display screen, and analyze and obtain the first brightness information or the second brightness information based on the captured image. In some embodiments, it can also be replaced by a device or equipment such as a brightness meter that can directly capture the first brightness information or the second brightness information.

[0044] Step S120: controlling the temperature of the LED display screen to rise and collecting second brightness information of each LED lamp in the LED display screen in a hot screen state;

[0045] After obtaining the first brightness information of each LED lamp in the cold screen state, the screen brightness can be increased to the normal temperature and the second brightness information of each LED lamp in the LED display screen in the hot screen state can be collected, wherein the hot screen state is the state when the LED display screen displays a white screen and the white temperature is less than 3300K. For details, please refer to Figure 3 , which shows Figure 1 A sub-process of step S120 in the brightness correction data acquisition method shown in FIG. 1 , wherein the temperature of the LED display screen is controlled to increase and the second brightness information of each LED lamp in the LED display screen in the hot screen state is collected, that is, step S120 at least includes:

[0046] Step S121: controlling the LED display screen to display a white screen, so that the LED display screen is heated to a preset normal use temperature;

[0047] Step S122: collecting second brightness information of each LED lamp after reaching the preset normal use temperature.

[0048] After collecting the first brightness information of each LED lamp in the LED display screen in the cold screen state and needing to collect the second brightness information of each LED lamp in the LED display screen in the hot screen state, the LED display screen can be controlled to display a white screen first, so as to heat the temperature of the screen to a preset normal use temperature, and then, after reaching the preset normal use temperature, the second brightness information of the three colors of LED lamp beads of red R, green G, and blue B is collected, that is, the second brightness information of the red LED lamp bead can be recorded as B2r(x,y), the second brightness information of the green LED lamp bead can be recorded as B2g(x,y), and the second brightness information of the blue LED lamp bead can be recorded as B2l(x,y), and (x,y) is the position coordinate of the LED lamp bead in the LED display screen.

[0049] Step S130: Generate brightness correction data for the same batch of LED display screens based on the first brightness information and the second brightness information.

[0050] After obtaining the first brightness information through step S110 and the second brightness information through step S120, the brightness change of each LED lamp can be determined according to the first brightness information and the second brightness information, and then the brightness correction data can be calculated. Figure 4 , which shows an example of the distribution of heat generating components in a simulated box of an LED display screen provided by an embodiment of the present invention, such as Figure 4 In actual application, a plurality of chips are usually arranged in an LED display screen to control the LED display screen in different zones. Therefore, the calculated correction data can be distributed to each chip in the LED display screen for zone control, and the display effect must be consistent. It should be noted that the LED display screens of the same batch are usually LED display screens produced in the same batch, and the positions and arrangements of the chips, power supplies, and LED lamp beads are usually consistent. Figure 4 For example, Figure 4 The LED cabinets of the simulated cabinets of the LED display screen having the same or substantially similar arrangement can be regarded as LED cabinets of the same batch.

[0051] Specifically, see Figure 5 , which shows Figure 1 A sub-process of step S130 in the brightness correction data acquisition method shown in FIG. 1 , wherein the brightness correction data of the same batch of LED display screens is generated based on the first brightness information and the second brightness information, that is, step S130 at least includes:

[0052] Step S131: calculating the brightness variation coefficient of each LED lamp according to the first brightness information and the second brightness information;

[0053] After obtaining the first brightness information B1r(x,y), B1g(x,y), B1l(x,y) of the red, green, and blue LED lamp beads, and the second brightness information B2r(x,y), B2g(x,y), B2l(x,y) of the red, green, and blue LED lamp beads, the brightness change coefficients of the three colors of LED lamp beads due to temperature rise can be calculated. Specifically, the brightness change coefficient of the red LED lamp bead Cr(x,y) = B2r(x,y) / B1r(x,y), the brightness change coefficient of the green LED lamp bead Cg(x,y) = B2g(x,y) / B1g(x,y), and the brightness change coefficient of the blue LED lamp bead Cb(x,y) = B2b(x,y) / B1b(x,y).

[0054] Step S132: Arrange the brightness variation coefficients in ascending or descending order;

[0055] After calculating the brightness variation coefficients Cr(x,y), Cg(x,y), and Cb(x,y) of each color of lamp beads, if the color temperature needs to be maintained, the brightness variation coefficients of the three colors of red, green, and blue need to be put together and arranged in order for the next step of calculation; if the color temperature does not need to be maintained, the brightness variation coefficients of the three colors of red, green, and blue need to be sorted separately and then calculated in the next step.

[0056] Step S133: setting the brightness error range ratio of the hot screen and the cold screen according to the first brightness information and the second brightness information;

[0057] Since the display brightness of LED lamp beads is discrete, there is a deviation between the set brightness and the actual displayed brightness of the LED lamp beads. Among them, a small number of LED lamp beads may display a brightness that is very different from the display effect of the vast majority of lamp beads due to problems such as workmanship. This will cause the overall display brightness of the LED display to have a deviation. In order to avoid this problem, a brightness error range ratio M2 for the hot screen and the cold screen can be set. For example, it can be set to 0.1%. If less than 0.1% of the LED lamps fail to reach the target brightness value after calibration, it is regarded as a situation where the preset display effect can be achieved within the error range.

[0058] Step S134: determining a brightness ratio coefficient according to the sorted brightness variation coefficient and the brightness error range ratio;

[0059] Then, based on the brightness error range ratio M2 and the sorted brightness variation coefficient, the value of the brightness variation coefficient at the brightness error range ratio M2 from high to low is taken as Value1, and the reciprocal of Value1 is taken as 1 / Value1 to obtain the brightness ratio coefficient M1. Among them, the brightness ratio coefficient M1 is also expressed as the assumed value of the overall brightness of the LED display screen after correction when the LED display screen is a hot screen, that is, the cold screen correction brightness is reduced by a percentage. And, if it is necessary to maintain the color temperature, the brightness ratio coefficients of the three colors of red, green and blue are the same, that is, M1=M1r=M1g=M1b; if it is not necessary to maintain the color temperature, the independent brightness ratio coefficients of the three colors of red, green and blue, M1r, M1g, and M1b, can be obtained.

[0060] Step S135: determining a brightness correction coefficient of each LED lamp according to the brightness ratio coefficient and the brightness variation coefficient;

[0061] Furthermore, after obtaining the brightness ratio coefficients M1r, M1g, and M1b of the three LED lamp beads of red, green, and blue and the brightness variation coefficients Cr(x, y), Cg(x, y), and Cb(x, y) of the three LED lamp beads of red, green, and blue, the brightness correction coefficients of each LED lamp can be calculated to adjust the brightness of each color LED lamp and realize brightness correction. Among them, the brightness correction coefficient of the red LED lamp bead is C1r(x, y) = M1r / Cr(x, y), the brightness correction coefficient of the green LED lamp bead is C1g(x, y) = M1g / Cg(x, y), and the brightness correction coefficient of the blue LED lamp bead is C1b(x, y) = M1b / Cr(x, y).

[0062] Step S136: based on the brightness correction coefficient of each LED lamp in the simulation box of each LED display screen, the brightness correction data of the LED display screens of the same batch are obtained.

[0063] After obtaining the brightness correction coefficients of the LED lights of various colors in a box, in order to ensure the accuracy of the correction coefficients, the brightness correction coefficients applicable to the same batch can be obtained. Multiple similar Figure 4 The LED display cabinet shown in the figure is used to obtain the brightness correction coefficient of each LED lamp bead in each cabinet, and the brightness correction coefficient of each cabinet is ModleN, where N is a positive integer. For example, when simulating three LED display cabinets, Modle1, Modle2, and Modle3 can be obtained, and assuming that the resolution of the simulated cabinet of each LED display is 640x360, the total data contained is 630x360x3 brightness correction coefficients, and the average value of the LED lamp beads at the same position (x, y) on the three cabinets can be taken as the brightness correction data of the LED lamp beads at this position of the same batch of LED display screens.

[0064] Embodiment 2

[0065] The embodiment of the present invention provides a method for obtaining chromaticity correction data of an LED display screen, see Figure 6 , which shows the process of a method for obtaining chromaticity correction data of an LED display screen provided by an embodiment of the present invention, and the method for obtaining chromaticity correction data includes but is not limited to the following steps:

[0066] Step S210: collecting first chromaticity information of each LED lamp in the LED display screen in a cold screen state;

[0067] In the embodiment of the present invention, first, the chromaticity of each LED lamp in the LED display screen in the cold screen state is collected. Specifically, the collecting of the first chromaticity information of each LED lamp in the LED display screen in the cold screen state includes: turning on the power of the LED display screen, and collecting the first chromaticity information of each LED lamp after the display signal of the LED display screen is stable. This step is similar to step S110 of the first embodiment, and both can use the image acquisition device to capture the picture and obtain the first chromaticity information of each LED lamp of the three colors of red R, green G, and blue B.

[0068] For further information, see Figure 7 , which shows the process of another method for acquiring chromaticity correction data of an LED display screen provided by an embodiment of the present invention. Before collecting the first chromaticity information of each LED lamp in the LED display screen in the cold screen state, the method further includes:

[0069] Step S201: Light up the LED display screen, and adjust the parameters of the image acquisition device according to the current chromaticity to complete the pre-calibration operation;

[0070] Step S202: Turn off the power of the LED display screen to allow the LED display screen to completely cool down to room temperature.

[0071] Similarly, step S201 is similar to step S101 in Example 1, and step S202 is also similar to step S102 in Example 1, except that the detection of brightness is replaced by the detection of chromaticity, and the pre-operation and detection method are similar, and the object of adjustment and detection is changed from brightness to chromaticity.

[0072] Step S220: controlling the temperature of the LED display screen to rise and collecting second chromaticity information of each LED lamp in the LED display screen in a hot screen state;

[0073] After obtaining the first chromaticity information of each LED lamp in the cold screen state, the screen brightness can be increased to the normal temperature and the second chromaticity information of each LED lamp in the LED display screen in the hot screen state can be collected. For details, please refer to Figure 8 , which shows Figure 6 A sub-process of step S220 in the chromaticity correction data acquisition method, wherein the temperature of the LED display screen is controlled to increase and the second chromaticity information of each LED lamp in the LED display screen in the hot screen state is collected, includes:

[0074] Step S221: controlling the LED display screen to display a white screen, so that the LED display screen is heated to a preset normal use temperature;

[0075] Step S222: collecting second chromaticity information of each LED lamp after reaching the preset normal use temperature.

[0076] Similarly, step S221 is similar to step S121 in Example 1, and step S222 is also similar to step S122 in Example 1. Both can use an image acquisition device to capture the picture and then obtain the second chromaticity information of each LED lamp of the three colors of red R, green G, and blue B when the LED display screen is in a hot screen state.

[0077] Step S230: Generate chromaticity correction data for the same batch of LED display screens based on the first chromaticity information and the second chromaticity information.

[0078] After obtaining the first chromaticity information through step S210 and the second chromaticity information through step S220, the brightness change of each LED lamp can be determined according to the first chromaticity information and the second chromaticity information, and then the chromaticity correction data can be calculated. Figure 4 Set up the same batch of LED displays, and refer to Fig. 9 , which shows Figure 6 A sub-process of step S230 in the method for obtaining chromaticity correction data, generating chromaticity correction data of the same batch of LED display screens based on the first chromaticity information and the second chromaticity information, includes:

[0079] Step S231: Calculating the chromaticity variation coefficient of each LED lamp according to the first chromaticity information and the second chromaticity information;

[0080] Step S232: Arrange the chromaticity change coefficients in ascending or descending order;

[0081] Step S233: setting the chromaticity error range ratio of the hot screen and the cold screen according to the first chromaticity information and the second chromaticity information;

[0082] Step S234: determining a chromaticity ratio coefficient according to the sorted chromaticity variation coefficient and the chromaticity error range ratio;

[0083] Step S235: determining the chromaticity correction coefficient of each LED lamp according to the chromaticity ratio coefficient and the chromaticity variation coefficient;

[0084] Step S236: based on the chromaticity correction coefficient of each LED lamp in the simulation box of each LED display screen, the chromaticity correction data of the LED display screens of the same batch are obtained.

[0085] Specifically, in the process of calculating the chromaticity correction data, each step is also the same as in the first embodiment and Figure 5The steps shown are similar, with two differences. One is that the brightness change coefficient, brightness ratio coefficient, and brightness correction coefficient are three parameters, while the chromaticity change coefficient, chromaticity ratio coefficient, and chromaticity correction coefficient have nine corresponding parameters. The other is that the calculation method of the chromaticity change coefficient is different from that shown in S131, and the chromaticity change coefficient is calculated by a standard color gamut conversion algorithm.

[0086] Embodiment 3

[0087] The present invention provides an LED display screen. Fig.10 , which shows that it is possible to execute Figures 1 to 5 The brightness correction data acquisition method or Figures 6 to 9 The hardware structure of the LED display screen 10 of the chromaticity correction data acquisition method.

[0088] The LED display screen 10 includes: at least one processor 11; and a memory 12 that is communicatively connected to the at least one processor 11. Fig.10 The memory 12 stores instructions that can be executed by the at least one processor 11, and the instructions are executed by the at least one processor 11 so that the at least one processor 11 can execute Figures 1 to 5 The brightness correction data acquisition method or Figures 6 to 9 The processor 11 and the memory 12 may be connected via a bus or other means. Fig.10 The example of connecting through bus is taken in the following.

[0089] The memory 12 is a non-volatile computer-readable storage medium that can be used to store non-volatile software programs, non-volatile computer executable programs and modules, such as the memory 12 in the embodiment of the present application. Figures 1 to 5 The brightness correction data acquisition method or Figures 6 to 9 The program instructions / modules corresponding to the color correction data acquisition method. The processor 11 executes various functional applications and data processing of the LED display screen by running the non-volatile software programs, instructions and modules stored in the memory 12, that is, realizing the above Figures 1 to 5 The brightness correction data acquisition method or Figures 6 to 9 The chromaticity correction data acquisition method.

[0090] The memory 12 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and applications required for at least one function; the data storage area may store data created according to the use of the device, etc. In addition, the memory 12 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some embodiments, the memory 12 may optionally include a memory remotely arranged relative to the processor 11, and these remote memories may be connected to the device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0091] The one or more modules are stored in the memory 12, and when executed by the one or more processors 11, execute the brightness correction data acquisition method or the chromaticity correction data acquisition method in any of the above method embodiments, for example, execute Figures 1 to 5 The brightness correction data acquisition method or Figures 6 to 9 The chromaticity correction data acquisition method.

[0092] The above-mentioned product can execute the method provided in the embodiment of the present application, and has the functional modules and beneficial effects corresponding to the execution method. For technical details not fully described in this embodiment, please refer to the method provided in the embodiment of the present application.

[0093] The present application also provides a non-volatile computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are executed by one or more processors, for example, Figures 1 to 5 The brightness correction data acquisition method or Figures 6 to 9 The chromaticity correction data acquisition method.

[0094] The present application also provides a computer program product, including a computer program stored on a non-volatile computer-readable storage medium, wherein the computer program includes program instructions. When the program instructions are executed by a computer, the computer executes the brightness correction data acquisition method or the chromaticity correction data acquisition method in any of the above method embodiments, for example, executing Figures 1 to 5 The brightness correction data acquisition method or Figures 6 to 9 The chromaticity correction data acquisition method.

[0095] In an embodiment of the present invention, a method for acquiring brightness and chromaticity correction data of an LED display screen and an LED display screen are provided. The correction data acquisition method can collect first brightness / chromaticity information and second brightness / chromaticity information of each LED lamp in the LED display screen in a cold screen state and a hot screen state respectively, and based on the first brightness / chromaticity information and the second brightness / chromaticity information, generate brightness / chromaticity correction data of the same batch of LED display screens. The correction data acquisition method provided in the embodiment of the present invention can obtain a set of brightness / chromaticity correction data common to the same batch of LED display screens. The correction data can be obtained by only collecting the brightness / chromaticity information of each LED in the cold screen state and the hot screen state. The correction process is simple, and no manual correction is required throughout the process. The correction process is fast and the labor cost is low.

[0096] It should be noted that the device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0097] Through the description of the above implementation methods, ordinary technicians in this field can clearly understand that each implementation method can be implemented by means of software plus a general hardware platform, and of course, it can also be implemented by hardware. Ordinary technicians in this field can understand that all or part of the processes in the above-mentioned embodiment method can be completed by instructing related hardware through a computer program, and the program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, the storage medium can be a disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM), etc.

[0098] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may also be combined, the steps may be implemented in any order, and there are many other changes in different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for acquiring brightness correction data of an LED display screen, characterized in that: include: Collecting first brightness information of each LED lamp in the LED display screen in a cold screen state; Controlling the temperature of the LED display screen to rise and collecting second brightness information of each LED lamp in the LED display screen in a hot screen state; Brightness correction data of the same batch of LED display screens is generated based on the first brightness information and the second brightness information.

2. The method for obtaining brightness correction data of an LED display screen according to claim 1, characterized in that: The collecting of the first brightness information of each LED lamp in the LED display screen in the cold screen state includes: The power of the LED display screen is turned on, and the first brightness information of each LED lamp is collected after the display signal of the LED display screen is stable.

3. The method for obtaining brightness correction data of an LED display screen according to claim 1, characterized in that: The step of controlling the temperature of the LED display screen and collecting the second brightness information of each LED lamp in the LED display screen in the hot screen state includes: Controlling the LED display screen to display a white screen so that the LED display screen is heated to a preset normal use temperature; After the preset normal use temperature is reached, the second brightness information of each LED lamp is collected.

4. The method for obtaining brightness correction data of an LED display screen according to claim 1, characterized in that: The step of generating brightness correction data of the same batch of LED display screens based on the first brightness information and the second brightness information includes: Calculating a brightness variation coefficient of each LED lamp according to the first brightness information and the second brightness information; Arrange the brightness variation coefficients in ascending or descending order; According to the first brightness information and the second brightness information, setting the brightness error range ratio of the hot screen and the cold screen; Determining a brightness ratio coefficient according to the sorted brightness variation coefficient and the brightness error range ratio; Determining a brightness correction coefficient for each LED lamp according to the brightness ratio coefficient and the brightness variation coefficient; Based on the brightness correction coefficient of each LED lamp in the simulation box of each LED display screen, the brightness correction data of the LED display screens of the same batch are obtained.

5. The method for acquiring brightness correction data of an LED display screen according to any one of claims 1 to 4, characterized in that: The method further comprises: Lighting up the LED display screen, adjusting the parameters of the image acquisition device according to the current brightness, so as to complete the pre-calibration operation; Turn off the power of the LED display screen to allow the LED display screen to completely cool down to room temperature.

6. A method for obtaining chromaticity correction data of an LED display screen, characterized in that: include: Collecting first chromaticity information of each LED lamp in the LED display screen in a cold screen state; Controlling the temperature of the LED display screen to rise and collecting second chromaticity information of each LED lamp in the LED display screen in a hot screen state; Based on the first chromaticity information and the second chromaticity information, chromaticity correction data of the same batch of LED display screens is generated.

7. The method for acquiring chromaticity correction data of an LED display screen according to claim 6, characterized in that: The collecting of the first chromaticity information of each LED lamp in the LED display screen in the cold screen state includes: The power of the LED display screen is turned on, and the first chromaticity information of each LED lamp is collected after the display signal of the LED display screen is stable.

8. The method for acquiring chromaticity correction data of an LED display screen according to claim 6, characterized in that: The step of controlling the temperature of the LED display screen and collecting the second chromaticity information of each LED lamp in the LED display screen in a hot screen state includes: Controlling the LED display screen to display a white screen so that the LED display screen is heated to a preset normal use temperature; After the preset normal use temperature is reached, the second chromaticity information of each LED lamp is collected.

9. The method for acquiring chromaticity correction data of an LED display screen according to claim 6, characterized in that: The method of generating chromaticity correction data of the same batch of LED display screens based on the first chromaticity information and the second chromaticity information includes: Calculating the chromaticity variation coefficient of each LED lamp according to the first chromaticity information and the second chromaticity information; Arrange the chromaticity variation coefficients in ascending or descending order; According to the first chromaticity information and the second chromaticity information, setting the chromaticity error range ratio of the hot screen and the cold screen; Determining a chromaticity ratio coefficient according to the sorted chromaticity variation coefficient and the chromaticity error range ratio; Determining a chromaticity correction coefficient of each LED lamp according to the chromaticity ratio coefficient and the chromaticity variation coefficient; Based on the chromaticity correction coefficient of each LED lamp in the simulation box of each LED display screen, the chromaticity correction data of the LED display screens of the same batch are obtained.

10. The method for acquiring chromaticity correction data of an LED display screen according to any one of claims 6 to 9, characterized in that: The method further comprises: Lighting up the LED display screen, adjusting the parameters of the image acquisition device according to the current chromaticity, so as to complete the pre-calibration operation; Turn off the power of the LED display screen to allow the LED display screen to completely cool down to room temperature.

11. An LED display screen, characterized in that: include: at least one processor; as well as, a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the method according to any one of claims 1 to 10.

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