Control method of LED display screen and corresponding assembly

Abstract

The invention is suitable for the technical field of display screens, and provides a control method of an LED display screen and a corresponding assembly. The control method of the LED display screen comprises the following steps: acquiring initial image data to be displayed; according to the initial image data, to-be-displayed colors of all pixels in the LED display screen are determined, and the to-be-displayed colors comprise a pure color and a mixed color; for each pixel, taking the correction coefficient of the corresponding color as a target correction coefficient according to the color to be displayed; according to the target correction coefficient of each pixel, correcting the initial image data to obtain corrected data; and controlling the LED display screen to display the corrected data. According to the embodiment of the invention, the display effect of the LED display screen can be improved.

Description

Technical Field

[0001] This application belongs to the technical field of display screens, and in particular relates to a control method and corresponding components for an LED display screen. Background Art

[0002] With the development of LED (Light-Emitting Diode) display screens towards small pitch and high resolution, Micro-LED (Micro Light-Emitting Diode) display screens and OLED (Organic Light-Emitting Diode) display screens are increasingly used.

[0003] For Micro-LED display screens and OLED display screens, there are certain differences between their pixel circuits and those of traditional LED display screens, and the voltage drop (IR-Drop) phenomenon is obvious. The voltage drop phenomenon causes differences in the display effects of each pixel in Micro-LED display screens and OLED display screens under specific circumstances. The traditional LED pure color correction method cannot improve this situation and is difficult to meet the application requirements of new display screens such as Micro-LED display screens and OLED display screens. Summary of the Invention

[0004] An embodiment of this application provides a control method and corresponding components for an LED display screen, which can improve the display effect of the LED display screen.

[0005] A first aspect of an embodiment of this application provides a control method for an LED display screen, including: obtaining initial image data to be displayed; determining, according to the initial image data, the colors to be displayed by each pixel in the LED display screen, where the colors to be displayed include pure colors and mixed colors; for each pixel, using the correction coefficient corresponding to the color to be displayed as the target correction coefficient; correcting the initial image data according to the target correction coefficient of each pixel to obtain corrected data; and controlling the LED display screen to display the corrected data.

[0006] In some embodiments of the first aspect, the step of, for each pixel, using the correction coefficient corresponding to the color to be displayed as the target correction coefficient includes: for each pixel, determining the corresponding display gray level; obtaining, according to the color to be displayed, the correction coefficients of the corresponding colors of each pixel at multiple calibrated gray levels; and determining the target correction coefficient according to the display gray level and the correction coefficients of the corresponding colors at the multiple calibrated gray levels.

[0007] In some embodiments of the first aspect, determining the target correction coefficient according to the correction coefficients of the corresponding colors at the display gray level and the multiple calibrated gray levels includes: if the display gray level is different from all of the multiple calibrated gray levels, performing interpolation processing on the correction coefficients of the corresponding colors at the multiple calibrated gray levels to obtain the target correction coefficient.

[0008] In some embodiments of the first aspect, after obtaining the initial image data to be displayed, it includes: performing gamma transformation on the initial image data.

[0009] In some embodiments of the first aspect, controlling the LED display screen to display the corrected data includes: performing inverse gamma transformation on the corrected data to obtain image data in the non-linear domain; performing gamma calibration on the image data in the non-linear domain according to gamma calibration data to obtain data to be output; controlling the LED display screen to display the data to be output.

[0010] In some embodiments of the first aspect, before performing gamma calibration on the image data in the non-linear domain according to gamma calibration data to obtain data to be output, it includes: controlling the LED display screen to display gray level data; obtaining the display brightness information when the LED display screen displays the gray level data; determining the gamma calibration data according to the displayed gray level data and the display brightness information.

[0011] A control device for an LED display screen provided in the second aspect of the embodiments of the present application includes: an acquisition unit for acquiring initial image data to be displayed; a determination unit for determining the colors to be displayed of each pixel in the LED display screen, where the colors to be displayed include pure colors and mixed colors; a correction coefficient determination unit for, for each pixel, using the correction coefficient of the corresponding color as the target correction coefficient according to the color to be displayed; a correction unit for correcting the initial image data according to the target correction coefficient of each pixel to obtain corrected data; a display control unit for controlling the LED display screen to display the corrected data.

[0012] A control device provided in the third aspect of the embodiments of the present application includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, the steps of the display correction method described in the first aspect above are implemented.

[0013] The fourth aspect of the embodiments of the present application provides an LED display system, including a control device and an LED display screen connected to the control device; wherein, the control device is configured to execute the steps of the control method of the LED display screen as described in the first aspect; the LED display screen is configured to display the corrected data sent by the control device.

[0014] The fifth aspect of the embodiments of the present application provides a computer-readable storage medium, which stores a computer program, and when the computer program is executed by a processor, it realizes the steps of the control method of the LED display screen as described in the first aspect above.

[0015] The sixth aspect of the embodiments of the present application provides a computer program product, which when running on a control device, causes the control device to execute the steps of the control method of the LED display screen as described in the first aspect above.

[0016] In the embodiments of the present application, by obtaining the initial image data to be displayed, determining the colors to be displayed for each pixel in the LED display screen according to the initial image data, for each pixel, taking the correction coefficient corresponding to the color to be displayed as the target correction coefficient, and then correcting the initial image data according to the target correction coefficient of each pixel to obtain the corrected data, and controlling the LED display screen to display the corrected data, it is possible to perform data correction for each pixel according to the corresponding display color, which helps to reduce the differences between different pixels caused by the IR-Drop problem and improve the display consistency of the LED display screen. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 is a schematic flowchart of the implementation of a control method for an LED display screen provided by an embodiment of the present application;

[0019] Figure 2 is a schematic structural diagram of an LED display system provided by an embodiment of the present application;

[0020] Figure 3 is a schematic flowchart of the specific implementation of step S105 provided by an embodiment of the present application;

[0021] Figure 4 is a schematic structural diagram of the control device provided by an embodiment of the present application;

[0022] Figure 5 It is a schematic structural diagram of a control device for an LED display screen provided by an embodiment of the present application;

[0023] Figure 6 It is a schematic structural diagram of a control device provided by an embodiment of the present application. Detailed implementation manners

[0024] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to 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. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present application.

[0025] In the fields of Micro-LED and OLED displays, display technologies using current drive mode inevitably have voltage drop characteristics, namely IR-Drop. The voltage drop phenomenon causes differences in the display effects of each pixel in Micro-LED display screens and OLED display screens under specific circumstances. The traditional LED pure color correction method cannot improve this situation and is difficult to meet the application requirements of new display screens such as Micro-LED display screens and OLED display screens.

[0026] In view of this, the present application proposes a special correction method to reduce the differences between different pixels caused by the IR-Drop problem, so as to improve the display consistency of the LED display screen.

[0027] In order to illustrate the technical solution of the present application, it will be described below through specific embodiments.

[0028] Figure 1 It shows a schematic implementation flow diagram of a control method for an LED display screen provided by an embodiment of the present application. This method can be applied to the control device of an LED display system and is applicable to the situation where the display correction effect needs to be improved.

[0029] Please refer to Figure 2 , in the implementation manner of the present application, the LED display system may include a control device and an LED display screen connected to the control device. Among them, the control device may be a control device for controlling the display screen.

[0030] Specifically, the control device may refer to a receiving card or other devices with the same or similar functions. In some implementation manners, it may specifically refer to a T-con chip. The LED display screen may refer to an OLED display screen, a Micro-LED display screen, or other types of LED display screens. The present application does not limit this.

[0031] It can be understood that Figure 2 it is merely a schematic diagram of the LED display system. In actual applications, the LED display system may further include a sending device, a host computer, etc. Figure 2 devices other than those shown, and this application does not limit this.

[0032] Specifically, the control method of the above LED display screen may include the following steps S101 to step S105.

[0033] Step S101, obtain the initial image data to be displayed.

[0034] Among them, the initial image data is the image data to be displayed by the LED display screen. In the implementation manner of this application, the image data stored in the memory of the control device (i.e., the image data provided by the internal source) can be obtained. The image data provided by the video source (i.e., the image data provided by the external source) can also be obtained. Among them, the video source and the control device can be directly connected or connected through a sending device. This application does not limit this.

[0035] Step S102, determine the color to be displayed for each pixel in the LED display screen according to the initial image data.

[0036] In the implementation manner of this application, each pixel point in the initial image data can be displayed through the corresponding pixel on the LED display screen. Through the corresponding relationship between the pixel points in the initial image data and each pixel in the LED display screen, the color to be displayed for each pixel can be determined. The color to be displayed is the color required for the pixel, which can include pure colors and mixed colors. Among them, the pure color can specifically refer to red (R), blue (B), and green (G), and the mixed color can specifically refer to white (W).

[0037] Specifically, in some implementation manners, for a single pixel on the LED display screen, the corresponding pixel point in the initial image data can be determined, and according to the RGB ratio data of the pixel point, the color to be displayed for this pixel on the LED display screen can be determined. For example, each pixel point in the initial image data can be displayed by the corresponding pixel on the LED display screen. For pixel A on the LED display screen, the pixel point that pixel A needs to display can be determined in the initial image data, and based on these pixel points, the color to be displayed for pixel A can be determined. For the pixel points that pixel A needs to display, the RGB ratio data can be determined. When the proximity degree of the ratios among R, G, and B reaches a preset proximity degree threshold, the color to be displayed can be confirmed as a mixed color. When the proximity degree of the ratios among R, G, and B is lower than the preset proximity degree threshold, the color to be displayed can be confirmed as a pure color and belongs to the color with the highest ratio among R, G, and B.

[0038] Step S103: For each pixel, according to the color to be displayed, use the correction coefficient corresponding to the color as the target correction coefficient.

[0039] Step S104: According to the target correction coefficient of each pixel, correct the initial image data to obtain the corrected data.

[0040] The target correction coefficient refers to the correction coefficient finally used for each pixel.

[0041] Specifically, the control device can provide the correction coefficients for pure colors and mixed colors simultaneously. For each pixel, if the color to be displayed is a mixed color, the correction coefficient of the mixed color can be used as the target correction coefficient to correct the part of the pixel to be displayed on the initial image data, obtaining the corrected data. If the color to be displayed is a pure color, the correction coefficient of the pure color can be used as the target correction coefficient to correct the part of the pixel to be displayed on the initial image data, obtaining the corrected data. After completing the correction pixel by pixel, the corrected data finally used for the LED display screen to display can be obtained.

[0042] Step S105: Control the LED display screen to display the corrected data.

[0043] In an embodiment of the present application, the control device can transmit the corrected data to the LED display screen and control the LED display screen to display through a control signal.

[0044] In an embodiment of the present application, by obtaining the initial image data to be displayed, determining the color to be displayed for each pixel in the LED display screen according to the initial image data, for each pixel, using the correction coefficient corresponding to the color as the target correction coefficient according to the color to be displayed, then correcting the initial image data according to the target correction coefficient of each pixel to obtain the corrected data, and controlling the LED display screen to display the corrected data, it can enable each pixel to perform data correction according to the corresponding display color, which helps to reduce the differences between different pixels caused by the IR-Drop problem, improving the display consistency of the LED display screen.

[0045] In order to ensure good consistency in the corrected effects of each gray level, in some embodiments of the present application, the control device can provide correction coefficients for different gray levels.

[0046] Correspondingly, in step S103, for each pixel, the control device can determine the corresponding display gray level, obtain the correction coefficients of the corresponding colors of each pixel at multiple calibrated gray levels according to the color to be displayed, and then determine the target correction coefficient according to the display gray level and the correction coefficients of the corresponding colors at multiple calibrated gray levels.

[0047] Among them, the displayed gray level refers to the gray level currently displayed on the LED display screen, and the calibrated gray level refers to the gray level corresponding to the existing calibration coefficient of the control device.

[0048] Specifically, the original brightness data of the LED display screen when displaying R, G, and B respectively can be detected gray level by gray level in advance. According to the original brightness data and the target brightness data expected to be displayed on the LED display screen, the calibration coefficient of the pure color under each calibrated gray level can be determined. Similarly, the original brightness data of the LED display screen when displaying R, G, B, and W respectively can be detected gray level by gray level in advance. According to the original brightness data and the target brightness data expected to be displayed on the LED display screen, the calibration coefficient of the mixed color under each calibrated gray level can be determined. These calibration coefficients can be pre-stored in the memory of the control device and read when the control device needs to perform image correction.

[0049] If the displayed gray level is the same as any one of the multiple calibrated gray levels, the control device can use the calibration coefficient of the corresponding color under the calibrated gray level that is the same as the displayed gray level as the target calibration coefficient.

[0050] If the displayed gray level is not the same as any of the multiple calibrated gray levels, interpolation processing is performed according to the calibration coefficients of the corresponding colors under the multiple calibrated gray levels to obtain the target calibration coefficient. Among them, the interpolation processing can adopt linear interpolation or other interpolation algorithms, and this application does not limit this. The number of calibration coefficients used for interpolation processing is at least two.

[0051] Exemplarily, 7 layers of calibration coefficients can be designed. The 7 layers of calibration coefficients can include the calibration coefficients of the pure colors of 4 different calibrated gray levels and the calibration coefficients of the mixed colors of 3 different calibrated gray levels. At this time, according to the displayed gray level and the color displayed by the pixel, any one of the 7 layers of calibration coefficients can be selected as the target calibration coefficient, or the target calibration coefficient can be obtained by performing interpolation processing on at least two corresponding color calibration coefficients among the 7 layers of calibration coefficients.

[0052] In this way, it can be ensured that the corrected display consistency under each gray level is good.

[0053] Considering that the calibration information is usually a coefficient obtained by analyzing the optical information in the image, and the optical information is a linear domain data, the calibration coefficient is a coefficient acting on the linear domain data. And in the process of obtaining the initial image data, when the externally input data is not linear domain data, the calibration coefficient cannot be applied. Therefore, in some embodiments of this application, if the above initial image data is non-linear domain image data, the control device can perform gamma transformation on the initial image data to convert the initial image data into linear domain image data.

[0054] Correspondingly, in order to ensure that the LED display screen can display and has a good display effect, in some other embodiments of the present application, as Figure 3 shown, step S105 may include the following steps S301 to S303.

[0055] Step S301: Perform an inverse gamma transformation on the calibrated data to obtain image data in the non-linear domain.

[0056] In the embodiments of the present application, the data output by the control device of the LED display screen has a non-linear relationship with the display brightness of the display screen. Therefore, in the control device, the calibrated data obtained after calibration processing needs to be subjected to an inverse Gamma transformation to obtain image data in the non-linear domain. The data used for the inverse Gamma transformation can be flexibly adjusted according to the non-linear curve of the display screen.

[0057] Step S302: Perform gamma calibration on the image data in the non-linear domain according to the gamma calibration data to obtain the data to be output.

[0058] Step S303: Control the LED display screen to display the data to be output.

[0059] In order to improve the gray-scale uniformity of the LED display screen, after the inverse Gamma transformation, the data also needs to be subjected to Gamma calibration processing. Gamma calibration can include RGB calibration and / or RGBW calibration. The data to be output obtained after calibration can be output to the driving chip of the LED display screen to drive the LED display screen to display.

[0060] Among them, the gamma calibration data refers to the data used to implement gamma calibration, and the image data can be calibrated to the required target brightness. In some embodiments, the LED display screen may include multiple display modules. Since the batches of the lamp beads of each display module are different, and the voltages, parasitic resistances, and capacitances of the peripheral circuits of the lamp beads are also different, each display module can respectively correspond to a copy of gamma calibration data.

[0061] Specifically, the LED display screen can be controlled to display gray-scale data, and then the display brightness information when the LED display screen displays the gray-scale data is obtained. According to the display gray-scale data and the display brightness information, the gamma calibration data is determined. It can be understood that this process can be independently implemented by the control device, or can be implemented by a combination of multiple devices such as the host computer and the control device.

[0062] Among them, the gray-scale data can be used to characterize the gray-scale level when the LED display screen displays the image data, and specifically can be Pulse Width Modulation (PWM) gray-scale data.

[0063] Exemplarily, gray-scale data from 0 to 255 or 0 to 1023 (actual display gray levels of the screen) can be sent to each pixel of each display module by a control device, and the display brightness information of the screen can be obtained through image analysis or a luminance meter. Then, based on the display brightness information, the display gray-scale data, and the required target brightness, gamma calibration data is obtained, such that the display brightness information can be calibrated to the required target brightness by the gamma calibration data. Among them, the gray-scale data can be sent by a host computer to a controller as an instruction, and then transmitted from the controller to the control device. The control device can reserve standard Low-Voltage Differential Signaling (LVDS) interfaces, I2C (Inter-Integrated Circuit) interfaces, and Serial Peripheral Interface (SPI) interfaces. Among them, the LVDS interface can be used to transmit gray-scale data, the I2C interface can be used to transmit instructions, and the SPI interface can be used to transmit gamma calibration data.

[0064] Correspondingly, please refer to Figure 4 , Figure 4 FIG. shows a schematic diagram of a control device designed with a T-con chip. The protocol analysis module can receive and analyze the initial image data and commands transmitted by the previous-level sending device. After completion of the analysis, command processing is performed, and the initial image data is stored in a memory, waiting for image processing. The image processing module can read the initial image data through the image data module, read the correction coefficient through the correction data module, perform Gamma transformation on the initial image data, read the correction coefficient and perform correction processing, then perform inverse Gamma transformation and gamma calibration on the corrected data, and output the data to the driving chip of the LED display screen by the timing control output module. The LED display screen is driven by the driving chip to display the received data.

[0065] It should be noted that, for the foregoing method embodiments, for simplicity of description, they are all expressed as a series of action combinations. However, those skilled in the art should know that the present application is not limited by the described action sequence, because according to the present application, certain steps can be performed in other sequences.

[0066] As Figure 5 FIG. shows a schematic structural diagram of a control device 500 of an LED display screen provided by an embodiment of the present application. The control device 500 of the LED display screen is configured on a control device.

[0067] Among them, the control device 500 of the LED display screen can include:

[0068] An acquisition unit 501, configured to acquire initial image data to be displayed;

[0069] A determination unit 502, configured to determine the color to be displayed for each pixel in the LED display screen according to the initial image data, where the color to be displayed includes pure colors and mixed colors;

[0070] A correction coefficient determination unit 503, configured to, for each pixel, use the correction coefficient of the corresponding color as the target correction coefficient according to the color to be displayed;

[0071] A correction unit 504, configured to correct the initial image data according to the target correction coefficient of each pixel to obtain corrected data;

[0072] A display control unit 505, configured to control the LED display screen to display the corrected data.

[0073] In some embodiments of the present application, the correction coefficient determination unit 503 may specifically be configured to: for each pixel, determine the corresponding display gray level; according to the color to be displayed, obtain the correction coefficients of the corresponding colors of each pixel at multiple calibrated gray levels; and determine the target correction coefficient according to the display gray level and the correction coefficients of the corresponding colors at the multiple calibrated gray levels.

[0074] In some embodiments of the present application, the correction coefficient determination unit 503 may specifically be configured to: if the display gray level is different from all the multiple calibrated gray levels, perform interpolation processing on the correction coefficients of the corresponding colors at the multiple calibrated gray levels to obtain the target correction coefficient.

[0075] In some embodiments of the present application, the acquisition unit 501 may further specifically be configured to: perform gamma transformation on the initial image data.

[0076] In some embodiments of the present application, the display control unit 505 may specifically be configured to: perform inverse gamma transformation on the corrected data to obtain image data in the non-linear domain; perform gamma calibration on the image data in the non-linear domain according to gamma calibration data to obtain data to be output; and control the LED display screen to display the data to be output.

[0077] In some embodiments of the present application, the control device 500 of the LED display screen may further include a data determination unit, specifically configured to: control the LED display screen to display gray level data; obtain the display brightness information when the LED display screen displays the gray level data; and determine the gamma calibration data according to the display gray level data and the display brightness information.

[0078] It should be noted that for the convenience and brevity of description, the specific working process of the above control device 500 of the LED display screen may be referred toFigures 1 to 4 The corresponding process of the method will not be elaborated here.

[0079] As Figure 6 shown, it is a schematic diagram of a control device provided by an embodiment of the present application. Specifically, the control device 6 may include: a processor 60, a memory 61, and a computer program 62 stored in the memory 61 and operable on the processor 60, such as a control program for an LED display screen. When the processor 60 executes the computer program 62, the steps in the embodiments of the above-mentioned control methods for each LED display screen are implemented, such as Figure 1 the steps S101 to S105 shown. Alternatively, when the processor 60 executes the computer program 62, the functions of each module / unit in the above-mentioned device embodiments are implemented, such as Figure 5 the functions of the acquisition unit 501, the determination unit 502, the correction coefficient determination unit 503, the correction unit 504, and the display control unit 505 shown.

[0080] The computer program may be divided into one or more modules / units. The one or more modules / units are stored in the memory 61 and executed by the processor 60 to complete the present application. The one or more modules / units may be a series of computer program instruction segments capable of performing specific functions, and these instruction segments are used to describe the execution process of the computer program in the control device.

[0081] For example, the computer program may be divided into: an acquisition unit, a determination unit, a correction coefficient determination unit, a correction unit, and a display control unit. The specific functions of each unit are as follows: the acquisition unit is used to acquire initial image data to be displayed; the determination unit is used to determine the color to be displayed for each pixel in the LED display screen according to the initial image data, and the color to be displayed includes pure color and mixed color; the correction coefficient determination unit is used to, for each pixel, use the correction coefficient corresponding to the color to be displayed as the target correction coefficient; the correction unit is used to correct the initial image data according to the target correction coefficient of each pixel to obtain corrected data; the display control unit is used to control the LED display screen to display the corrected data.

[0082] The control device may include, but is not limited to, a processor 60 and a memory 61. Those skilled in the art can understand that Figure 6 it is only an example of the control device and does not constitute a limitation on the control device. It may include more or fewer components than shown in the figure, or combine certain components, or different components. For example, the control device may further include input / output devices, network access devices, buses, etc.

[0083] The so-called processor 60 may be a Central Processing Unit (CPU), or may also be other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), off-the-shelf programmable gate arrays, or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor, or the processor may also be any conventional processor, etc.

[0084] The memory 61 may be an internal storage unit of the control device, such as the hard disk or memory of the control device. The memory 61 may also be an external storage device of the control device, such as a plug-in hard disk equipped on the control device, a Smart Media Card (SMC), a Secure Digital (SD) card, a Flash Card, etc. Further, the memory 61 may also include both the internal storage unit and the external storage device of the control device. The memory 61 is used to store the computer program and other programs and data required by the control device. The memory 61 may also be used to temporarily store the data that has been output or will be output.

[0085] It should be noted that for the convenience and brevity of description, the structure of the above control device may also refer to the specific description of the structure in the method embodiment, which will not be elaborated here.

[0086] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above division of each functional unit and module is used as an example. In actual applications, the above functions can be allocated to different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment may be integrated in a processing unit, or each unit may exist physically alone, or two or more units may be integrated in one unit. The above integrated unit may be implemented in the form of hardware or in the form of a software functional unit. In addition, the specific names of each functional unit and module are only for the convenience of mutual distinction and do not limit the protection scope of this application. The specific working processes of the units and modules in the above system may refer to the corresponding processes in the foregoing method embodiment, which will not be elaborated here.

[0087] In the above embodiments, the descriptions of the respective embodiments each have their own emphasis. For parts not described in detail or recorded in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0088] Those of ordinary skill in the art can realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or by a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this application.

[0089] In the embodiments provided in this application, it should be understood that the disclosed device / control device and method can be implemented in other ways. For example, the device / control device embodiments described above are merely illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces, and the indirect couplings or communication connections of the devices or units can be in electrical, mechanical or other forms.

[0090] 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 can be located in one place, or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0091] In addition, the functional units in the various embodiments of this application can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above integrated units can be implemented in the form of hardware or in the form of software functional units.

[0092] When the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, to implement all or part of the processes in the above-described embodiment methods of the present application, it can also be completed by a computer program instructing relevant hardware. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, the steps of the above-described various method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in the form of source code, object code, executable file, or some intermediate form, etc. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disc, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal, and software distribution medium, etc. It should be noted that the content included in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electrical carrier signals and telecommunication signals.

[0093] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A control method for an LED display screen, characterized in that, including: Obtain initial image data to be displayed; According to the initial image data, determine the colors to be displayed for each pixel in the LED display screen, where the colors to be displayed include pure colors and mixed colors; For each pixel, use the correction coefficient corresponding to the color to be displayed as the target correction coefficient; According to the target correction coefficient of each pixel, correct the initial image data to obtain corrected data; Control the LED display screen to display the corrected data.

2. The control method of the LED display screen according to claim 1, wherein The step of "For each pixel, use the correction coefficient corresponding to the color to be displayed as the target correction coefficient" includes: For each pixel, determine the corresponding display gray level; According to the color to be displayed, obtain the correction coefficients of the corresponding colors of each pixel at multiple calibrated gray levels; According to the display gray level and the correction coefficients of the corresponding colors at the multiple calibrated gray levels, determine the target correction coefficient.

3. The control method of the LED display screen according to claim 2, characterized in that, The step of "According to the display gray level and the correction coefficients of the corresponding colors at the multiple calibrated gray levels, determine the target correction coefficient" includes: If the display gray level is different from all the multiple calibrated gray levels, perform interpolation processing on the correction coefficients of the corresponding colors at the multiple calibrated gray levels to obtain the target correction coefficient.

4. The control method of the LED display screen according to any one of claims 1 to 3, characterized in that, After obtaining the initial image data to be displayed, it includes: Perform gamma transformation on the initial image data.

5. The control method of the LED display screen according to any one of claims 1 to 3, characterized in that The step of "Control the LED display screen to display the corrected data" includes: Perform inverse gamma transformation on the corrected data to obtain image data in the non-linear domain; According to gamma calibration data, perform gamma calibration on the image data in the non-linear domain to obtain data to be output; Control the LED display screen to display the data to be output.

6. The control method of the LED display screen according to claim 5, wherein Before performing gamma calibration on the image data in the non-linear domain according to the gamma calibration data to obtain data to be output, it includes: Control the LED display screen to display gray scale data; Obtain the display brightness information when the LED display screen displays the gray scale data; According to the display gray scale data and the display brightness information, determine the gamma calibration data.

7. A control device for an LED display screen, characterized in that, including: An acquisition unit for obtaining initial image data to be displayed; A determination unit for determining the colors to be displayed for each pixel in the LED display screen according to the initial image data, where the colors to be displayed include pure colors and mixed colors; A correction coefficient determination unit for using the correction coefficient corresponding to the color to be displayed as the target correction coefficient for each pixel; A correction unit for correcting the initial image data according to the target correction coefficient of each pixel to obtain corrected data; A display control unit for controlling the LED display screen to display the corrected data.

8. A control device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the control method of the LED display screen according to any one of claims 1 to 6.

9. An LED display system, including a control device and an LED display screen connected to the control device; Among them, The control device is used to execute the steps of the control method of the LED display screen according to any one of claims 1 to 6; The LED display screen is used to display the corrected data sent by the control device.

10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the control method of the LED display screen according to any one of claims 1 to 6.

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