A method, device, system and electronic equipment for adjusting brightness of an LED screen
By adjusting the LED screen brightness using target current gain and target Gamma value, the problem of contrast loss caused by brightness adjustment in existing technologies is solved, resulting in a better display effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HANGZHOU HIKVISION DIGITAL TECHNOLOGY CO LTD
- Filing Date
- 2023-06-30
- Publication Date
- 2026-06-26
AI Technical Summary
Existing methods for adjusting LED screen brightness by adjusting the maximum Gamma value result in excessive brightness differences, leading to a loss of screen contrast and poor display quality.
The brightness of the LED screen is adjusted by combining the target current gain and the target Gamma value, reducing the adjustment range of the Gamma value, and combining the actual screen brightness and color temperature to precisely adjust the brightness to maintain the contrast.
While maintaining a basically unchanged screen contrast ratio, the screen display effect was improved, and the contrast loss caused by Gamma value adjustment was reduced.
Smart Images
Figure CN116825028B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of displays, and more particularly to a method, apparatus, system, and electronic device for adjusting the brightness of an LED screen. Background Technology
[0002] Currently, the common method for adjusting LED screen brightness is to input the grayscale values of the displayed content into a specified Gamma conversion formula to obtain the Gamma value corresponding to each grayscale value, and then adjust the maximum Gamma value to regulate the LED screen brightness. However, this method of adjusting the brightness of the LED screen by adjusting the maximum Gamma value can lead to large brightness differences, resulting in a loss of screen contrast and poor screen display quality. Summary of the Invention
[0003] In view of this, embodiments of this application provide an LED screen brightness adjustment method, apparatus, system, and electronic device to improve the screen display effect when adjusting the LED screen brightness.
[0004] According to a first aspect of the embodiments of this application, an LED screen brightness adjustment method is provided, the method being applied to an LED controller, the method comprising:
[0005] Receive a brightness adjustment command; the brightness adjustment command is used to instruct the adjustment of the screen brightness, and the brightness adjustment command carries a target brightness.
[0006] The target current gain is determined based on the target brightness, the preset reference brightness, and the current gain matched to the preset reference brightness.
[0007] Based on the target brightness and the preset reference brightness, the target Gamma value is determined;
[0008] The target current gain and the target Gamma value are sent to the screen so that the screen can adjust the brightness.
[0009] According to a second aspect of the embodiments of this application, an LED screen brightness adjustment device is provided, the device being applied to an LED controller, the device comprising:
[0010] A brightness adjustment command receiving module is used to receive brightness adjustment commands; the brightness adjustment commands are used to instruct the adjustment of the screen brightness, and the brightness adjustment commands carry a target brightness.
[0011] The target current gain determination module is used to determine the target current gain based on the target brightness, a preset reference brightness, and the current gain matched to the preset reference brightness.
[0012] The target Gamma value determination module is used to determine the target Gamma value based on the target brightness and a preset reference brightness.
[0013] A brightness adjustment module is used to send the target current gain and the target Gamma value to the screen so that the screen can adjust the brightness.
[0014] According to a third aspect of the embodiments of this application, an LED screen brightness adjustment system is provided, the system comprising:
[0015] A luminance meter is used to collect the actual screen brightness and color temperature of an LED screen.
[0016] A computer is used to calculate the current gain matching the reference brightness based on the received actual screen brightness of the LED screen and a preset reference brightness, as well as the reference color temperature that matches the actual color temperature and the reference brightness.
[0017] An LED controller for performing the method as described in the first aspect;
[0018] An LED screen is used to adjust the brightness of the screen after receiving a target current gain and a target Gamma value from the LED controller.
[0019] According to a fourth aspect of the embodiments of this application, an electronic device is provided, the electronic device comprising: a processor and a memory;
[0020] The memory is used to store machine-executable instructions;
[0021] The processor is configured to read and execute machine-executable instructions stored in the memory to implement the method as described in the first aspect.
[0022] The technical solutions provided in this application embodiment may include the following beneficial effects:
[0023] In this embodiment, the screen brightness of the LED screen is adjusted by adjusting both the target current gain and the target Gamma value. This reduces the adjustment range of the Gamma value and mitigates the loss of screen contrast caused by adjusting the brightness of the LED screen solely by adjusting the maximum Gamma value. This achieves screen brightness adjustment while maintaining a basically unchanged screen contrast, thereby improving the screen display effect. Attached Figure Description
[0024] Figure 1 This is a block diagram illustrating an LED screen brightness adjustment system according to an embodiment of this application.
[0025] Figure 2This is a flowchart illustrating an LED screen brightness adjustment method according to an embodiment of this application.
[0026] Figure 3 This is an example diagram illustrating the adjustment of the Gamma curve in an embodiment of this application.
[0027] Figure 4 This is a block diagram illustrating an LED screen brightness adjustment device according to an embodiment of this application.
[0028] Figure 5 This is a block diagram of an electronic device illustrated in an embodiment of this application. Detailed Implementation
[0029] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.
[0030] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.
[0031] It should be understood that although the terms first, second, third, etc., may be used in this application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."
[0032] The embodiments described in this specification will now be described in detail.
[0033] like Figure 1 As shown, Figure 1 This is a schematic diagram of an LED screen brightness adjustment system according to an embodiment of this application. Figure 1 As shown, the LED screen brightness adjustment system includes: an LED display screen, an LED controller, a computer, and a luminance meter.
[0034] Among them, an LED display screen is a type of flat panel display, which is composed of small LED module panels and is used to display various information such as text, images, and videos.
[0035] A luminance meter is installed in front of the LED display screen. In this embodiment, the luminance meter can be fixedly installed in front of the LED display screen to collect the screen parameters of the LED display screen, or it can be used by hand to collect the screen parameters of the LED display screen from the front of the LED display screen when the user has a need to adjust the screen brightness. This embodiment of the application is not specifically limited.
[0036] Here, screen parameters may include screen brightness and color temperature, etc., which are not specifically limited in this application embodiment.
[0037] A computer is used to calculate the current gain matching the reference brightness based on the screen parameters (actual screen brightness and actual color temperature) of the LED display sent by the received luminance meter and the preset screen parameters (preset reference brightness and reference color temperature matching the reference brightness).
[0038] An LED controller is used to determine the target current gain and target Gamma value based on the received target brightness, the preset reference brightness, and the current gain matched to each reference brightness.
[0039] The LED display screen is also used to adjust the brightness of the LED display screen after receiving the target current gain and target Gamma value sent by the LED controller.
[0040] based on Figure 1 The network topology shown below will be used in conjunction with the network topology described below. Figure 2 The method provided in the embodiments of this application is described as follows:
[0041] See Figure 2 , Figure 2 This is a flowchart illustrating a method provided in an embodiment of this application. The method is applied to the aforementioned LED controller, such as... Figure 2 As shown, the process may include the following steps:
[0042] S210: Receives brightness adjustment commands.
[0043] For example, in this embodiment, the brightness adjustment command is used to instruct the adjustment of the screen brightness. The brightness adjustment command can be sent by the user through their operable smart terminal. Here, the smart device can be, for example, a mobile phone, a computer, a tablet, etc. This application embodiment does not specifically limit the smart terminal.
[0044] In this embodiment, an app that can adjust screen brightness can be installed on the terminal, allowing the user to adjust the screen brightness. Here, the screen can be any LED display screen.
[0045] In step S210, the brightness adjustment command carries the target brightness. Here, the target brightness is the screen brightness that the user expects to adjust. It can be input by the user on the display interface of an APP installed on their operable smart terminal. In this embodiment, after the smart terminal receives the target brightness input by the user, it triggers the sending of a brightness adjustment command to the LED controller.
[0046] S220: Determine the target current gain based on the target brightness, the preset reference brightness, and the current gain matched to the preset reference brightness.
[0047] For example, in this embodiment, before performing this step S220, N reference brightness values are preset, where N is greater than or equal to 1. For example, the N preset screen brightness values can be 100 nit, 200 nit...1000 nit.
[0048] In this embodiment, the current gain matched to any reference brightness is determined based on the reference brightness, the actual screen brightness measured, the reference color temperature matched to the reference brightness, and the actual color temperature measured to the screen.
[0049] Here, the reference color temperature for matching the reference brightness can be one, that is, all reference brightnesses correspond to one reference color temperature. Of course, the reference color temperature for matching the reference brightness can also be N, that is, each reference brightness corresponds to one reference color temperature. This application embodiment does not specifically limit this.
[0050] Specifically, the actual screen brightness and actual color temperature are collected by the aforementioned luminance meter and sent to the computer. The computer then uses a specified algorithm (e.g., PID control algorithm) to calculate the reference brightness, the measured actual screen brightness, the reference color temperature matching the reference brightness, and the measured actual color temperature of the screen to obtain the current gain matching the reference brightness. Here, the PID control algorithm is a conventional algorithm and will not be described in detail.
[0051] Here, the current gain matched to the reference brightness obtained through the PID adjustment algorithm refers to the current gain required to adjust the actual screen brightness and actual color temperature to the reference brightness and the reference color temperature matched by the reference brightness. That is, by using the PID algorithm to adjust the RGB of the screen, the actual screen brightness and actual color temperature reach the reference brightness and the reference color temperature matched by the reference brightness, and thus obtain the current gain matched to the reference brightness.
[0052] This application embodiment calculates the current gain matched to the reference brightness by collecting the actual screen brightness and actual color temperature, and then calculates the current gain matched to the reference brightness and the reference color temperature that matches the reference brightness. Based on the calculated current gain matched to the reference brightness, the target current gain is determined. This takes into account the actual brightness and color temperature of the LED screen, ensuring that the actual brightness displayed on different LED screens is the same, making the adjustment more precise. At the same time, the color temperature of different batches of screens remains consistent, which facilitates the management and control of different batches of screens.
[0053] In this embodiment, there are many ways to determine the target current gain based on the target brightness, the preset reference brightness, and the current gain matched by the preset reference brightness. This application embodiment does not specifically limit the methods.
[0054] As an example, based on the target brightness, a preset reference brightness, and the current gain matched to the preset reference brightness, the target current gain is determined as follows:
[0055] When the target brightness is the same as one of the preset reference brightness, the target current gain is determined to be the current gain that matches the reference brightness.
[0056] When the target is greater than the first reference brightness and less than the second reference brightness, the target current gain is determined to be the current gain that matches the second reference brightness, and the first reference brightness is less than the second reference brightness.
[0057] When the target brightness is less than the minimum reference brightness, the target current gain is determined to be the current gain that matches the minimum reference brightness.
[0058] S230: Determine the target Gamma value based on the target brightness and the preset reference brightness.
[0059] For example, in this embodiment, there are many ways to determine the target Gamma value based on the target brightness and the preset reference brightness in step S230, and this application embodiment does not specifically limit the methods.
[0060] As an example, determining the target Gamma value based on the target brightness and a preset reference brightness can specifically be as follows:
[0061] When the target brightness is the same as one of the preset reference brightness values, the first Gamma value is used as the target Gamma value.
[0062] When the target brightness is greater than the first reference brightness and less than the second reference brightness, the second Gamma value is used as the target Gamma value; the second Gamma value is obtained by the first Gamma value, the second reference brightness and the target brightness, and the first reference brightness is less than the second reference brightness;
[0063] When the target brightness is less than the minimum reference brightness, the third Gamma value is used as the target Gamma value; the third Gamma value is obtained by using the first Gamma value, the minimum reference brightness, and the target brightness.
[0064] For example, in this embodiment, the first Gamma value is the Gamma value corresponding to the maximum grayscale value on the screen, that is, the Gamma value corresponding to a grayscale value of 255. The first Gamma value can be obtained directly by reading the screen parameters.
[0065] In this embodiment, the second Gamma value can be calculated using the following formula:
[0066] Second Gamma value = First Gamma value / Second reference brightness * Target brightness
[0067] For example, when the first reference brightness is 70 nits, the second reference brightness is 80 nits, and the target brightness is 75 nits, then the target Gamma value = the first Gamma value / 80 * 75.
[0068] In this embodiment, the aforementioned third Gamma value can be calculated using the following formula:
[0069] Third Gamma value = First Gamma value / Minimum reference brightness * Target brightness
[0070] For example, when the minimum reference brightness is 100 nits and the target brightness is 75 nits, the target Gamma value = first Gamma value / 100 * 75.
[0071] It should be noted that the present application embodiment does not specifically limit the execution order of the above steps S220 and S230. Step S220 can be executed first and then step S230 can be executed, or step S230 can be executed first and then step S220 can be executed, or steps S220 and S230 can be executed simultaneously.
[0072] S240: Send the target current gain and target Gamma value to the screen so that the screen can adjust the brightness.
[0073] For example, in this embodiment, after the screen receives the target current gain and the target Gamma value, it can first adjust the brightness based on the target current gain and then adjust the brightness based on the target Gamma value, or it can first adjust the brightness based on the target Gamma value and then adjust the brightness based on the target current gain. This application embodiment does not specifically limit the adjustment order of the target current gain and the target Gamma value, and can determine it according to the actual situation.
[0074] This concludes the process. Figure 2 The process is shown below.
[0075] pass Figure 2 As can be seen from the process shown, in this embodiment, the screen brightness of the LED screen is adjusted by adjusting the target current gain and the target Gamma value together, which reduces the adjustment range of the Gamma value and reduces the loss of screen contrast caused by adjusting the brightness of the LED screen by adjusting only the maximum value of Gamma. This achieves the adjustment of screen brightness while keeping the screen contrast basically unchanged, thereby improving the screen display effect.
[0076] As an optional implementation of this application, when the target brightness is less than the minimum reference brightness, the LED screen brightness adjustment method further includes:
[0077] The Gamma conversion formula is determined by the first Gamma value and the maximum gray value, and the Gamma curve corresponding to the screen is obtained based on the Gamma conversion formula.
[0078] The Gamma curve is adjusted by a specified adjustment method. In the adjusted Gamma curve, the brightness corresponding to gray values less than a specified gray threshold is less than the brightness corresponding to the same gray value on the unadjusted Gamma curve, and the brightness corresponding to gray values greater than the specified gray threshold is greater than the brightness corresponding to the same gray value on the unadjusted Gamma curve.
[0079] For example, in this embodiment, the above Gamma conversion formula can be: Y = a * x^r, where Y represents the Gamma value, x represents the grayscale value, and a and r are constants; here, r is a fixed known value, and a needs to be calculated. Specifically, the first Gamma value and the maximum grayscale value are input into the above Gamma conversion formula to obtain the value of a, and then the Gamma conversion formula can be obtained. Based on the Gamma conversion formula, the Gamma curve corresponding to the screen can be obtained. In the Gamma curve, the horizontal axis is the grayscale value and the vertical axis is the Gamma value.
[0080] It should be noted that the vertical axis of the Gamma curve can also be the brightness value. Here, the brightness value and the Gamma value are directly proportional. After calculating the Gamma value corresponding to each grayscale value using the Gamma conversion formula mentioned above, the brightness value can be calculated based on the Gamma value.
[0081] For example, in this embodiment, there are many kinds of specified adjustment methods, such as multi-segment function fitting, quadratic transformation curve iteration, etc., and this application embodiment is not specifically limited.
[0082] It should be noted that the above-mentioned multi-segment function fitting and quadratic transformation curve iteration are conventional methods, and will not be elaborated on here.
[0083] In this embodiment, when the target brightness is less than the minimum reference brightness, the Gamma curve also needs to be adjusted to adjust the contrast, so as to keep the contrast of the specified screen as constant as possible and the display quality is still high under low brightness.
[0084] like Figure 3 As shown, if the Gamma curve before adjustment is: Y = a * x^r, where Y represents the Gamma value, x represents the gray value, and a and r are constants.
[0085] This application embodiment adjusts the Gamma curve using a multi-segment function fitting method, specifically:
[0086] like Figure 3 As shown, during adjustment, A is the starting point, C is the fixed point (which can be selected as needed), and E is the ending point. The coordinates of BD are determined by the contrast coefficient m. The larger m is, the lower the coordinate of B is and the higher the coordinate of D is, that is, the stronger the contrast of the Gamma curve. The BD coordinates can be set by the user according to their own needs (it is required that B is lower than the original curve and D is higher than the original curve).
[0087] Given the coordinates of points A, B, C, D, and E, and considering ABC and CDE as two linear curves in three variables, by applying the equation-solving formula (mathematical formula) to the coordinates of the three points, we can obtain the function curves of ABC and CDE as follows:
[0088] y ABC =j1*x 2 +j2*x+j3
[0089] y CDE =k1*x 2 +k2*x+k3
[0090] Where j1, j2, j3 and k1, k2, k3 are all constants.
[0091] The Gamma value corresponding to each grayscale value can be calculated using these two formulas, thus completing the contrast adjustment.
[0092] The embodiments of this application improve screen display quality significantly compared to traditional methods by adding contrast adjustment processing under low brightness conditions.
[0093] Corresponding to the embodiments of the aforementioned methods, embodiments of the present application also provide embodiments of the apparatus and the terminal to which it is applied.
[0094] like Figure 4 As shown, Figure 4 This is a block diagram illustrating an LED screen brightness adjustment device according to an embodiment of this application. The LED screen brightness adjustment device is applied to an LED controller and includes:
[0095] A brightness adjustment command receiving module is used to receive brightness adjustment commands; the brightness adjustment command is used to instruct the adjustment of the screen brightness, and the brightness adjustment command carries the target brightness.
[0096] The target current gain determination module is used to determine the target current gain based on the target brightness, the preset reference brightness, and the current gain matched to the preset reference brightness.
[0097] The target Gamma value determination module is used to determine the target Gamma value based on the target brightness and a preset reference brightness.
[0098] The brightness adjustment module is used to send the target current gain and target Gamma value to the screen so that the screen can adjust the brightness.
[0099] As an optional implementation of this application, the current gain matched to any reference brightness is determined based on the reference brightness, the actual screen brightness measured, the reference color temperature matched to the reference brightness, and the actual color temperature measured to the screen.
[0100] As an optional implementation of this application, the target current gain determination module is specifically used for:
[0101] When the target brightness is the same as one of the preset reference brightness, the target current gain is determined to be the current gain that matches the reference brightness.
[0102] When the target is greater than the first reference brightness and less than the second reference brightness, the target current gain is determined to be the current gain that matches the second reference brightness, and the first reference brightness is less than the second reference brightness.
[0103] When the target brightness is less than the minimum reference brightness, the target current gain is determined to be the current gain that matches the minimum reference brightness.
[0104] As an optional implementation of this application, the target Gamma value determination module is specifically used for:
[0105] When the target brightness is the same as one of the preset reference brightness, the first Gamma value is used as the target Gamma value. The first Gamma value is the Gamma value corresponding to the maximum grayscale value in the screen. The first Gamma value is obtained by reading the screen parameters of the screen.
[0106] When the target brightness is greater than the first reference brightness and less than the second reference brightness, the second Gamma value is used as the target Gamma value; the second Gamma value is obtained by the first Gamma value, the second reference brightness and the target brightness, and the first reference brightness is less than the second reference brightness;
[0107] When the target brightness is less than the minimum reference brightness, the third Gamma value is used as the target Gamma value; the third Gamma value is obtained by using the first Gamma value, the minimum reference brightness, and the target brightness.
[0108] As an optional implementation of this application, the second Gamma value is calculated by the following formula: second Gamma value = first Gamma value / second reference brightness * target brightness.
[0109] As an optional implementation of this application, the third Gamma value is calculated using the following formula: Third Gamma value = First Gamma value / Minimum reference brightness * Target brightness.
[0110] As an optional implementation of this application, when the target brightness is less than the minimum reference brightness, the LED screen brightness adjustment device further includes:
[0111] The Gamma curve acquisition module is used to determine the Gamma conversion formula through the first Gamma value and the maximum gray value, and to obtain the Gamma curve corresponding to the screen based on the Gamma conversion formula.
[0112] The adjustment module is used to adjust the Gamma curve by a specified adjustment method. On the adjusted Gamma curve, the brightness corresponding to gray values less than a specified gray threshold is less than the brightness corresponding to the same gray value on the original Gamma curve, and the brightness corresponding to gray values greater than the specified gray threshold is greater than the brightness corresponding to the same gray value on the original Gamma curve.
[0113] The specific implementation process of the functions and roles of each unit in the above device can be found in the implementation process of the corresponding steps in the above method, and will not be repeated here.
[0114] This concludes the process. Figure 4 Description of the device shown.
[0115] For the device embodiments, since they basically correspond to the method embodiments, the relevant parts can be referred to in the description of the method embodiments. The device embodiments described above are merely illustrative. The modules described as separate components may or may not be physically separate, and the components shown as modules may or may not be physical modules, that is, they may be located in one place or distributed across multiple network modules. Some or all of the modules can be selected to achieve the purpose of the solution in this specification according to actual needs. Those skilled in the art can understand and implement this without creative effort.
[0116] Correspondingly, embodiments of this application also provide Figure 4 The hardware structure diagram of the device shown is as follows: Figure 5 As shown, the electronic device can be a device implementing the above-described method. Figure 5 As shown, the hardware architecture includes a processor and memory.
[0117] The memory is used to store machine-executable instructions;
[0118] The processor is used to read and execute machine-executable instructions stored in the memory to implement the corresponding LED screen brightness adjustment method embodiment shown above.
[0119] As one embodiment, the memory can be any electronic, magnetic, optical, or other physical storage device that can contain or store information such as executable instructions, data, etc. For example, the memory can be volatile memory, non-volatile memory, or similar storage media. Specifically, the memory can be RAM (Random Access Memory), flash memory, storage drives (such as hard disk drives), solid-state drives, any type of storage disk (such as optical discs, DVDs, etc.), or similar storage media, or combinations thereof.
[0120] This concludes the process. Figure 5 Description of the electronic device shown.
[0121] The foregoing has described specific embodiments of this specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims may be performed in a different order than that shown in the embodiments and may still achieve the desired result. Furthermore, the processes depicted in the drawings do not necessarily require the specific or sequential order shown to achieve the desired result. In some embodiments, multitasking and parallel processing are possible or may be advantageous.
[0122] Other embodiments of this specification will readily occur to those skilled in the art upon consideration of the specification and practice of the invention claimed herein. This specification is intended to cover any variations, uses, or adaptations that follow the general principles of this specification and include common knowledge or customary techniques in the art not claimed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this specification are indicated by the following claims.
[0123] It should be understood that this specification is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this specification is limited only by the appended claims.
[0124] The above description is merely a preferred embodiment of this specification and is not intended to limit this specification. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this specification should be included within the scope of protection of this specification.
Claims
1. A method for adjusting the brightness of an LED screen, characterized in that, The method is applied to an LED controller, and the method includes: Receive a brightness adjustment command; the brightness adjustment command is used to instruct the adjustment of the screen brightness, and the brightness adjustment command carries a target brightness. The target current gain is determined based on the target brightness, the preset reference brightness, and the current gain matched to the preset reference brightness. Based on the target brightness and the preset reference brightness, the target Gamma value is determined; The target current gain and the target Gamma value are sent to the screen so that the screen can adjust the brightness. The step of determining the target Gamma value based on the target brightness and a preset reference brightness includes: when the target brightness is the same as one of the preset reference brightnesses, using a first Gamma value as the target Gamma value, wherein the first Gamma value is the Gamma value corresponding to the maximum grayscale value on the screen, and the first Gamma value is obtained by reading the screen parameters of the screen; when the target brightness is greater than the first reference brightness and less than the second reference brightness, using a second Gamma value as the target Gamma value; the second Gamma value is obtained by using the first Gamma value, the second reference brightness, and the target brightness, wherein the first reference brightness is less than the second reference brightness; when the target brightness is less than the minimum reference brightness, using a third Gamma value as the target Gamma value; the third Gamma value is obtained by using the first Gamma value, the minimum reference brightness, and the target brightness.
2. The method according to claim 1, characterized in that, The current gain matched to any reference brightness is determined based on the reference brightness, the actual screen brightness measured, the reference color temperature matched to the reference brightness, and the actual color temperature measured to the screen.
3. The method according to claim 1, characterized in that, Determining the target current gain based on the target brightness, a preset reference brightness, and a current gain matched to the preset reference brightness includes: When the target brightness is the same as one of the preset reference brightnesses, the target current gain is determined to be the current gain that matches the reference brightness. When the target brightness is greater than the first reference brightness and less than the second reference brightness, the target current gain is determined to be a current gain that matches the second reference brightness, wherein the first reference brightness is less than the second reference brightness. When the target brightness is less than the minimum reference brightness, the target current gain is determined to be the current gain that matches the minimum reference brightness.
4. The method according to claim 1, characterized in that, The second Gamma value is calculated using the following formula: Second Gamma value = First Gamma value / Second reference brightness Target brightness.
5. The method according to claim 1, characterized in that, The third Gamma value is calculated using the following formula: Third Gamma value = First Gamma value / Minimum reference brightness Target brightness.
6. The method according to claim 1, characterized in that, When the target brightness is less than the minimum reference brightness, the method further includes: The Gamma conversion formula is determined by the first Gamma value and the maximum gray value, and the Gamma curve corresponding to the screen is obtained based on the Gamma conversion formula. The Gamma curve is adjusted by a specified adjustment method. In the adjusted Gamma curve, the brightness corresponding to gray values less than a specified gray threshold is less than the brightness corresponding to the same gray value on the unadjusted Gamma curve, and the brightness corresponding to gray values greater than the specified gray threshold is greater than the brightness corresponding to the same gray value on the unadjusted Gamma curve.
7. An LED screen brightness adjustment device, characterized in that, The device is used in an LED controller, and the device includes: A brightness adjustment command receiving module is used to receive brightness adjustment commands; the brightness adjustment commands are used to instruct the adjustment of the screen brightness, and the brightness adjustment commands carry a target brightness. The target current gain determination module is used to determine the target current gain based on the target brightness, a preset reference brightness, and the current gain matched to the preset reference brightness. The target Gamma value determination module is used to determine the target Gamma value based on the target brightness and a preset reference brightness. A brightness adjustment module is used to send the target current gain and the target Gamma value to the screen so that the screen can adjust the brightness. The step of determining the target Gamma value based on the target brightness and a preset reference brightness includes: when the target brightness is the same as one of the preset reference brightnesses, using a first Gamma value as the target Gamma value, wherein the first Gamma value is the Gamma value corresponding to the maximum grayscale value on the screen, and the first Gamma value is obtained by reading the screen parameters of the screen; when the target brightness is greater than the first reference brightness and less than the second reference brightness, using a second Gamma value as the target Gamma value; the second Gamma value is obtained by using the first Gamma value, the second reference brightness, and the target brightness, wherein the first reference brightness is less than the second reference brightness; when the target brightness is less than the minimum reference brightness, using a third Gamma value as the target Gamma value; the third Gamma value is obtained by using the first Gamma value, the minimum reference brightness, and the target brightness.
8. An LED screen brightness adjustment system, characterized in that, The system includes: A luminance meter is used to collect the actual screen brightness and color temperature of an LED screen. A computer is used to calculate the current gain matching the reference brightness based on the received actual screen brightness of the LED screen and a preset reference brightness, as well as the reference color temperature that matches the actual color temperature and the reference brightness. An LED controller for performing the method as described in any one of claims 1 to 6; An LED screen is used to adjust the brightness of the screen after receiving a target current gain and a target Gamma value sent by the LED controller.
9. An electronic device, characterized in that, Electronic devices include: processors and memory; The memory is used to store machine-executable instructions; The processor is configured to read and execute machine-executable instructions stored in the memory to implement the method as described in any one of claims 1 to 6.