RGB backlight brightness correction method and device, equipment and medium

Abstract

The invention relates to the technical field of display, in particular to an RGB backlight brightness correction method and device, equipment and a medium. The target brightness value of each color system component is determined according to the preset first brightness level and the first actually measured brightness value of each color system component under the preset current condition, so that the influence of an extreme brightness level is avoided, and the precision of the target brightness value is improved; when the brightness amplification coefficient of the corresponding color system component is determined by using the corresponding target brightness value and the actually measured brightness value, the precision of the brightness amplification coefficient is improved. And performing current compensation on each display unit according to the brightness amplification coefficient to obtain the adjusted current, reversely determining the current compensation to realize adaptive adjustment of each color system component, and correcting the RGB backlight brightness based on the adjusted current, thereby improving the accuracy of RGB backlight brightness correction.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to an RGB backlight brightness correction method, device, equipment and medium. BACKGROUND

[0002] In the RGB LED backlight LCD display device, due to the influence of production process difference, the brightness output of each RGB display unit is prone to be inconsistent, which leads to uneven brightness of the display picture, seriously affecting the visual experience. In the process of correcting the brightness of the RGB backlight, the prior art corrects according to the difference between the detected brightness value of the RGB display unit and the reference brightness value, the brightness level determination does not exclude the interference of extreme values, and the reference is insufficient, so that the accuracy of the RGB backlight brightness correction is low. Therefore, how to improve the accuracy of the RGB backlight brightness correction in the process of correcting the brightness of the RGB backlight becomes a problem to be solved. SUMMARY

[0003] In view of this, the embodiments of the present application provide an RGB backlight brightness correction method, device, equipment and medium to solve the problem of low accuracy in the process of correcting the brightness of the RGB backlight.

[0004] In a first aspect, the embodiments of the present application provide an RGB backlight brightness correction method, which comprises: collecting first measured brightness values of color components of a lamp panel RGB display unit under a preset first brightness level and a preset current condition; determining target brightness values of the color components of the RGB display unit under the preset first brightness level and the preset current condition according to the first measured brightness values of the color components; determining a brightness amplification coefficient of a corresponding color component according to a ratio of the target brightness value of the corresponding color component to the first measured brightness value of the corresponding color component; adjusting the current of the color components based on the brightness amplification coefficient to obtain an adjusted current, and the adjusted current is used to correct the brightness of the color components of the RGB display unit.

[0005] In a second aspect, the embodiments of the present application provide an RGB backlight brightness correction device, which comprises: a collection module, configured to collect first measured brightness values of color components of a lamp panel RGB display unit under a preset first brightness level and a preset current condition; a first determination module, configured to determine target brightness values of the color components of the RGB display unit under the preset first brightness level and the preset current condition according to the first measured brightness values of the color components; a second determining module configured to determine a brightness amplification coefficient of each color component according to a ratio of a target brightness value of each color component to a first measured brightness value of the corresponding color component; a third determining module configured to adjust a current of each color component based on the brightness amplification coefficient to obtain an adjusted current, the adjusted current being used to correct the brightness of each color component of the RGB display unit.

[0006] In a third aspect, an embodiment of the present application provides a computer device, which comprises a processor, a memory, and a computer program stored in the memory and executable on the processor, and the processor implements the RGB backlight brightness correction method as described above when executing the computer program.

[0007] In a fourth aspect, an embodiment of the present application provides a computer readable storage medium, which stores a computer program, and the computer program is executable on a processor to implement the RGB backlight brightness correction method as described above.

[0008] Compared with the prior art, the present application has the following beneficial effects: In the present application, the target brightness value of each color component is determined according to the first measured brightness value of each color component under the condition of the preset first brightness level and the preset current, the influence of the extreme brightness level is avoided, the accuracy of the target brightness value is improved, and the accuracy of the brightness amplification coefficient is improved when the corresponding target brightness value and the measured brightness value are used to determine the brightness amplification coefficient of the corresponding color component. The current compensation is performed on each display unit according to the brightness amplification coefficient to obtain the adjusted current, the current compensation is reversely determined, the adaptive adjustment of each color component is implemented, the RGB backlight brightness is corrected based on the adjusted current, and the accuracy of the RGB backlight brightness correction is improved. BRIEF DESCRIPTION OF DRAWINGS

[0009] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative labor based on these drawings.

[0010] Figure 1 is an application environment schematic diagram of an RGB backlight brightness correction method provided by an embodiment of the present application; Figure 2 is a flow schematic diagram of an RGB backlight brightness correction method provided by an embodiment of the present application; Figure 3 is a structure schematic diagram of an RGB backlight brightness correction device provided by an embodiment of the present application; Figure 4 Fig. 1 is a structural schematic diagram of a computer device according to an embodiment of the present application. DETAILED DESCRIPTION

[0011] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0012] In the following description, specific details are set forth in connection with the particular structures, techniques, and the like to provide a thorough understanding of the embodiments of the present application. However, persons skilled in the art understand that the present application can be practiced in other embodiments that are not described in detail in this description. In other cases, well-known systems, devices, circuits, and methods have not been described in detail to avoid unnecessary detail to obscure the present application.

[0013] It should be understood that the term "comprising" as used in the specification and the appended claims indicates the presence of the recited features, integers, steps, operations, elements, and / or components, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0014] It should also be understood that the term "and / or" as used in the specification and the appended claims indicates any combination of one or more of the associated listed items and all possible combinations of the items.

[0015] As used in the specification and the appended claims, the term "if" can be interpreted as meaning "when" or "once" or "in response to a determination" or "in response to a detection" depending on the context. Similarly, the phrase "if determined" or "if detected [the described condition or event]" can be interpreted as meaning "once determined" or "in response to a determination" or "once detected [the described condition or event]" or "in response to a detection [the described condition or event]" depending on the context.

[0016] In addition, in the description of the present application and the appended claims, the terms "first", "second", "third", etc. are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0017] Reference within the specification of this patent to, "one embodiment," "an embodiment," or "some embodiments," means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. The appearances of the phrase "in one embodiment" or "in some embodiments" in various places within specified sections of this specification are not necessarily all referring to the same embodiment, although it can. The terms "including," "comprising," "having" and variations thereof are meant to encompass the items listed thereafter, but do not exclude other items from also being present. The terms "a" and "an" are defined as meaning one or more unless explicitly indicated to the contrary or otherwise evident from the context.

[0018] It should be understood that the size of the serial number of each step in the following embodiments does not mean the order of execution, and the execution order of each process should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the application.

[0019] In order to illustrate the technical solutions of the present application, the following will be described through specific embodiments.

[0020] An embodiment of the present application provides an RGB backlight brightness correction method, which can be applied in an application environment such as Figure 1 , wherein a client and a server communicate. The client includes but is not limited to a palmtop computer, a desktop computer, a notebook computer, an ultra-mobile personal computer (UMPC), a netbook, a cloud computer device, a personal digital assistant (PDA), and the like. The server can be a stand-alone server, or a cloud server providing cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communication, middleware services, domain name services, security services, content delivery networks (CDNs), and basic cloud computing services such as big data and artificial intelligence platforms.

[0021] In order to illustrate the technical solutions of the present application, the following will be described through specific embodiments.

[0022] Referring to Figure 2 , an embodiment of the present application provides an RGB backlight brightness correction method, as shown in Figure 2 , which can include the following steps.

[0023] S201: Collecting first measured brightness values of color components of a lamp panel RGB display unit under a preset first brightness level and a preset current condition.

[0024] In step S201, the RGB display unit includes a plurality of display units, and the luminance value in each display unit includes luminance values of RGB color components. A first luminance level is preset as a luminance corresponding to a preset duty cycle, and the first measured luminance values of the color components are luminance values of R, G and B color components in RGB.

[0025] In this embodiment, a high-precision luminance detection device is used to detect all RGB display units of the lamp panel, and the first measured luminance values of the color components of the RGB display units of the lamp panel under a preset first luminance level and a preset current condition are collected. For example, the preset current can be a rated current, and the preset first luminance level is 90% luminance, i.e. the luminance when the duty cycle is 90%. The first measured luminance values of the color components under the rated current and the condition of a duty cycle of 90% are collected, and the first measured luminance values are determined as reference luminance values, which provide comprehensive data support for subsequent correction. The luminance values under other duty cycles can also be collected, which is not limited in this embodiment.

[0026] In this embodiment, the first measured luminance values of the color components of the RGB display units of the lamp panel under 90% luminance, i.e. the luminance when the duty cycle is 90%, are collected, so as to ensure that the first measured luminance values of the color components are obtained when the driving circuit in the lamp panel has high efficiency, the current fluctuation is small, the dimming resolution is higher, and thus the first measured luminance values of the color components collected have higher accuracy.

[0027] S202: According to the first measured luminance values of the color components, target luminance values of the color components of the RGB display unit under the preset first luminance level and the preset current condition are determined.

[0028] In step S202, the target luminance values are target reference values of the color components, so as to facilitate calculation of corresponding luminance amplification coefficients based on the target luminance values.

[0029] In this embodiment, the preset current can be a rated current, and the preset first luminance level is 90% luminance, i.e. the luminance when the duty cycle is 90%. The RGB display unit includes a plurality of display units, and each display unit includes luminance values of the color components. According to the first measured luminance values, the mean value of the first measured luminance values of the color components of all display units is calculated, and the mean value of the first measured luminance values of the color components of all display units is determined as the target luminance values of the color components of the RGB display unit under the preset first luminance level and the preset current condition.

[0030] In this embodiment, according to the first measured luminance values under the preset first luminance level and the preset current condition, the mean value of the luminance values of the color components is determined as the target luminance values of the color components, which can filter out the interference of noise and improve the accuracy of the target luminance values.

[0031] Optionally, the target brightness value of each color component of the RGB display unit under the preset first brightness level and the preset current condition is determined according to the first measured brightness value of each color component, comprising: For any color component, all the first measured brightness values of the corresponding color component in the RGB display unit are sorted from large to small to obtain a sorting result, and a plurality of target display units are determined according to the sorting result. The first average value of the first measured brightness value of the corresponding color component of all the target display units is determined according to the first measured brightness value of the corresponding color component of each display unit in the plurality of target display units, and the first average value is determined as the target brightness value of the corresponding color component.

[0032] In this embodiment, for any color component, the first measured brightness value of the corresponding color component is sorted from large to small to obtain a sorting result, and a plurality of target display units are determined according to the sorting result. When determining the plurality of target display units, the brightness value of the color component corresponding to 10% of the maximum value and the brightness value of the color component corresponding to 10% of the minimum value are removed according to the sorting result, the display units corresponding to the brightness values of the remaining 80% of the color components are determined as the target display units, the first average value of the first measured brightness value of the corresponding color component of all the target display units is determined according to the first measured brightness value of the corresponding color component of each display unit in the plurality of target display units, that is, the first measured brightness value of the corresponding color component of all the target display units is added and divided by the number of target display units, and the first average value is determined as the target brightness value of the corresponding color component.

[0033] It should be noted that the target display units of different color components may be different. For example, for the R color component, the brightness value of the R color component of each display unit is collected under the rated current and 90% duty cycle, and the brightness values of the R color components of all the display units are sorted from large to small to obtain a first sorting result. According to the first sorting result, a plurality of first target display units are determined. For the G color component, the brightness value of the G color component of each display unit is collected under the rated current and 90% duty cycle, and the brightness values of the G color components of all the display units are sorted from large to small to obtain a second sorting result. According to the second sorting result, a plurality of second target display units are determined.

[0034] In this embodiment, when determining the target brightness value of the corresponding color component, the smaller part and the larger part of the first measured brightness value of the corresponding color component are removed to exclude the influence of extreme values and improve the accuracy of the target brightness value.

[0035] S203: Determine the brightness amplification coefficient of the corresponding color component according to the ratio of the target brightness value of each color component to the first measured brightness value of the corresponding color component.

[0036] In step S203, the luminance amplification coefficient is the amplification coefficient between the first measured luminance value of each color component and the target luminance value, wherein the luminance amplification coefficient is the luminance amplification coefficient corresponding to each display unit.

[0037] In this embodiment, the luminance amplification coefficient of the corresponding color component is determined according to the ratio of the target luminance value of each color component to the first measured luminance value of the corresponding color component. For example, if the target luminance value of the R color component is LR=96nits, and the first measured luminance value of the R color component of one display unit is 94nits, then the luminance amplification coefficient of the R color component of the corresponding display unit is r1=96 / 94≈1.0213. If the target luminance value of the G color component is LR=322nits, and the first measured luminance value of the G color component of one display unit is 316nits, then the luminance amplification coefficient of the G color component of the corresponding display unit is g1=322 / 316≈1.0190.

[0038] In this embodiment, the luminance amplification coefficient of the corresponding color component is determined according to the ratio of the target luminance value of each color component to the first measured luminance value of the corresponding color component, so that when the corresponding current is adjusted according to the corresponding luminance amplification coefficient, the current can be increased proportionally, and thus based on the adjusted current, the luminance of each color component of each display unit can be close to the target luminance value, thereby improving the accuracy of each color component of the RGB display unit of the lamp panel.

[0039] Optionally, the determining the luminance amplification coefficient of the corresponding color component comprises: collecting third measured luminance values of each color component of the RGB display unit of the lamp panel under a preset second luminance level and a preset current condition; determining second target luminance values of each color component of the RGB display unit under the preset second luminance level and the preset current condition according to the third measured luminance values of each color component; calculating the ratio of the target luminance value of each color component to the first measured luminance value of the corresponding color component to determine the first luminance amplification coefficient; calculating the ratio of the second target luminance value of each color component to the second measured luminance value of the corresponding color component to determine the second luminance amplification coefficient; determining the luminance amplification coefficient of the corresponding color component as the average of the first luminance amplification coefficient and the second luminance amplification coefficient of each color component.

[0040] In the embodiment, the preset second brightness level is the brightness corresponding to the preset duty cycle, the preset second brightness level is 5% brightness, that is, the brightness when the duty cycle is 5%, and the second measured brightness value of each color component under the condition of the rated current and the duty cycle of 5% is collected. According to the second measured brightness value, the average of the second measured brightness value of each color component of all units is calculated, and the average of the second measured brightness value of each color component of all units is used to determine the second target brightness value of each color component of the RGB display unit under the condition of the preset second brightness level and the preset current. The ratio of the target brightness value of each color component to the first measured brightness value corresponding to each color component is calculated to determine the first brightness amplification coefficient; the ratio of the second target brightness value of each color component to the second measured brightness value corresponding to each color component is calculated to determine the second brightness amplification coefficient; and the average of the first brightness amplification coefficient and the second brightness amplification coefficient of each color component is determined as the brightness amplification coefficient of the corresponding color component.

[0041] In the embodiment, when determining the brightness amplification coefficient of the corresponding color component, the amplification coefficients of the brightness under different brightness levels are considered, and the accuracy of the brightness amplification coefficient is improved.

[0042] S204: Adjust the current of each color component based on the brightness amplification coefficient to obtain an adjusted current, and the adjusted current is used to correct the brightness of each color component of the RGB display unit.

[0043] In step S204, the current of each color component is adjusted based on the brightness amplification coefficient, that is, the current size is adjusted according to the brightness amplification coefficient, and the brightness value of the corresponding color component is adjusted by adjusting the current of the corresponding color component.

[0044] In the embodiment, based on the brightness amplification coefficient, the current of the corresponding color component is adjusted to the same multiple of the current, that is, based on the brightness amplification coefficient, the rated current is adjusted to the current of the corresponding multiple, when the brightness amplification coefficient is greater than 1, the current is increased, and when the brightness amplification coefficient is less than 1, the current is decreased.

[0045] In the embodiment, the current of each color component is adjusted based on the brightness amplification coefficient, the brightness compensation of each color component is realized, the brightness value of each color component is as close as possible to the corresponding target brightness value, and more accurate color restoration is realized.

[0046] Optionally, after obtaining the adjusted current, the method further includes: determining the second measured brightness value of each color component under the condition of the preset first brightness level and the adjusted current, the second measured brightness value being the brightness value after the RGB backlight brightness correction; determining the abnormal color component according to the second measured brightness value of each color component and the target brightness value of each color component.

[0047] In this embodiment, after the adjusted current is obtained, a high-precision brightness detection device is used to detect all RGB display units of the lamp panel, and second measured brightness values of each color component of the RGB display units of the lamp panel under the preset first brightness level and the adjusted current are collected. According to the second measured brightness values of each color component and the target brightness values of each color component, the abnormal color component is determined, which is a color component with a large difference between the measured brightness value and the target brightness value corresponding to the color component.

[0048] In this embodiment, the brightness difference between the second measured brightness value of each color component and the target brightness value of each color component is calculated, and when the brightness difference is greater than a preset brightness difference threshold, the corresponding color component is determined to be an abnormal color component. The formula for calculating the brightness difference between the second measured brightness value of each color component and the target brightness value of each color component is as follows: wherein, is the brightness difference between the second measured brightness value of the color component and the target brightness value of the corresponding color component, is the target brightness value of the corresponding color component, is the second measured brightness value of the corresponding color component in the nth display unit, wherein the color component is any color component in RGB.

[0049] When the brightness difference is greater than the preset threshold, the corresponding color component is determined to be an abnormal color component, wherein the preset brightness difference threshold can be set according to specific circumstances, and the present embodiment is not limited. For example, if the preset brightness difference threshold is ±2%, when the brightness difference of the R color component in one of the display units is -1.66%, the R color component of the corresponding display unit is determined to be qualified, and when the brightness difference of the G color component in one of the display units is -2.66%, the G color component of the corresponding display unit is determined to be abnormal.

[0050] In this embodiment, according to the second measured brightness value of each color component and the target brightness value of each color component, the color component with a large difference from the target brightness value of the corresponding color component is found out, so as to correct the abnormal color component.

[0051] Optionally, determining the abnormal color component comprises: For any color component, according to the target brightness value, determining the level target brightness values corresponding to a plurality of brightness levels; Based on the adjusted current, collecting a plurality of level measured brightness values of each color component under a plurality of brightness levels corresponding to the color component; For any brightness level, the level brightness difference quantity under the corresponding brightness level is determined according to the level target brightness value and the level measured brightness value of the brightness level, and the level brightness difference quantities of all brightness levels are determined by traversing all brightness levels. The mean value of the level brightness difference quantities of all brightness levels is calculated to obtain a difference quantity mean value, and when the difference quantity mean value is greater than a preset brightness difference threshold value, the corresponding color component is determined as an abnormal color component.

[0052] In this embodiment, for any color component, the level target brightness values corresponding to a plurality of brightness levels are determined according to the target brightness value, and the level target brightness value is the corresponding target brightness value multiplied by the corresponding level. For example, the level target brightness value of the 50% brightness level is the target brightness value multiplied by 50%, and if the R color component target brightness value is 96 nits, the level target brightness value corresponding to the 50% brightness level is 48 nits, and the level target brightness value corresponding to the 80% brightness level is 76.8 nits.

[0053] Based on the adjusted current, a plurality of level measured brightness values of each color component at a plurality of brightness levels corresponding to the color component are collected. For example, if the level measured brightness value of the 50% brightness level is collected, the level measured brightness value of the color component corresponding to the 50% brightness level under the condition of the adjusted current is collected. If the level measured brightness value of the 80% brightness level is collected, the level measured brightness value of the color component corresponding to the 80% brightness level under the condition of the adjusted current is collected.

[0054] For any brightness level, the level brightness difference quantity under the corresponding brightness level is determined according to the level target brightness value and the level measured brightness value of the brightness level, and the level brightness difference quantities of all brightness levels are determined by traversing all brightness levels. The level brightness difference quantity is equal to the level target brightness value minus the level measured brightness value, and then divided by the level target brightness value. For example, the R color component target brightness value is 96 nits, the level target brightness value corresponding to the 80% brightness level is 76.8 nits, the level measured brightness value of the 80% brightness level is 75 nits, and the corresponding level difference quantity is 2.34%. The level brightness difference quantities of all brightness levels are determined by traversing all brightness levels. The plurality of brightness levels can include a plurality of brightness levels in the 0%-100% full brightness level.

[0055] The mean value of the level brightness difference quantities of all brightness levels is calculated to obtain a difference quantity mean value, and when the difference quantity mean value is greater than a preset brightness difference threshold value, the corresponding color component is determined as an abnormal color component. The preset brightness difference threshold value is set according to the actual situation, and is not limited in this embodiment.

[0056] In this embodiment, based on the luminance difference amount under different luminance levels, the corresponding abnormal color component is determined, the luminance difference amount under different luminance levels is considered, the detection error under a single luminance level is avoided, and the detection accuracy of the abnormal color component is improved.

[0057] Optionally, determining the abnormal color component further includes: For any color component, the measured chromaticity coordinates of the color component under the adjusted current condition are collected; The standard chromaticity coordinates of the color component are obtained, and the chromaticity difference amount of the corresponding color component is calculated according to the measured chromaticity coordinates and the standard chromaticity coordinates; When the chromaticity difference amount is greater than a preset chromaticity difference threshold, the corresponding color component is determined as an abnormal color component.

[0058] In this embodiment, for any color component, the measured chromaticity coordinates of the color component under the adjusted current condition are collected using a chromaticity coordinate measurement tool, such as the measured chromaticity coordinates of the B color component being (0.15, 0.09), and the standard chromaticity coordinates of the color component are obtained, wherein the standard chromaticity coordinates are pre-set chromaticity coordinates, such as the standard chromaticity coordinates of the B color component being (0.15, 0.06). The chromaticity difference amount of the corresponding color component is calculated according to the measured chromaticity coordinates and the standard chromaticity coordinates, and when calculating, the offset distance between the measured chromaticity coordinates and the standard chromaticity coordinates can be calculated, such as the measured chromaticity coordinates of the B color component being (0.15, 0.09), the standard chromaticity coordinates of the B color component being (0.15, 0.06), and the chromaticity difference amount of the B color component being 0.03. When the chromaticity difference amount is greater than a preset chromaticity difference threshold, the corresponding color component is determined as an abnormal color component. For example, the preset chromaticity difference threshold is set to 0.015, the chromaticity difference amount of the B color component in the above example is 0.03, which is greater than 0.015, and the corresponding color component is determined as an abnormal color component. The value of the preset chromaticity difference threshold is set according to the actual situation, and this embodiment is not limited.

[0059] It should be noted that when collecting the measured chromaticity coordinates of the color component under the adjusted current condition, the color component of each display unit in the lamp panel RGB display unit is collected, the measured chromaticity coordinates of each display unit color component under the adjusted current condition are determined, the chromaticity difference amount of the corresponding color component in each display unit is calculated, and whether the color component in the corresponding display unit is an abnormal color component is determined according to the corresponding chromaticity difference amount.

[0060] In this embodiment, the abnormal color component is determined according to the chromaticity difference amount of each display unit, so as to avoid color deviation caused by color gamut difference when correcting the abnormal color component, and improve the visual effect.

[0061] Optionally, after determining the abnormal color component, the method further comprises: correcting all abnormal color components to obtain a corrected lamp panel RGB display unit; encoding the brightness value of each color component of each display unit in the corrected lamp panel RGB display unit to determine the brightness encoding result of the corrected lamp panel RGB display unit; converting the brightness encoding result into a two-dimensional code, and the two-dimensional code is used to store the brightness value of each color component of each display unit in the corrected lamp panel RGB display unit.

[0062] In this embodiment, all abnormal color components are corrected, and the correction can include repair and replacement. After correction, the brightness value and the corresponding chromaticity coordinate of each color component are collected under the adjusted current condition until all abnormal color components are normal to obtain the corrected lamp panel RGB display unit.

[0063] The brightness value of each color component of each display unit in the corrected lamp panel RGB display unit is encoded to determine the brightness encoding result of the corrected lamp panel RGB display unit. For a small number of display units of the RGB display unit, a "value mapping - group merging - 32 conversion" lossless algorithm is used to process the amplification coefficient. The value range of the amplification coefficient is 0.800-1.200, the amplification coefficient is mapped to a 10-bit binary integer through y=round [(x-0.800) / 0.400×1023], and 5 data are merged into a 50-bit binary number, converted into 10 32-bit characters, and the compression rate is improved by 40%.

[0064] For the case of a large number of display units of the RGB display unit, such as 6144 coefficients for 2048 RGB display units, a lossless compression algorithm of "coefficient normalization - 8-bit integer mapping - binary conversion - 128-bit grouping - 128-bit character conversion - feature character extraction" is used. The coefficient is the measured luminance value of each color component in each display unit at 90% brightness level. First, all coefficients are normalized to ensure that the value range is in [0.800, 1.200], and the abnormal values outside the range are processed by truncation. Then, the linear mapping formula y = round [(x-0.800) / 0.400x255] is used to convert the floating-point value x to an 8-bit integer y, and then each y value is converted to an 8-bit binary number. After all y values are converted, a binary data stream is formed. The binary stream is divided into groups of 128 bits, and each group is converted into 18 characters (the first 17 segments take 7-bit binary corresponding to standard ASCII characters, and the last 1 segment takes 9-bit binary corresponding to extended ASCII characters). Feature characters are extracted from all converted characters at fixed intervals as compressed data bits.

[0065] The "2-bit product code (identification model / batch) + compressed data bit + 2-bit CRC-8 check bit" is combined to form a unique code. For the case of 2048 RGB display units, the product code is a 2-byte fixed identification, and the check bit is generated by the CRC-8 algorithm. The calculation object includes the product code and the byte stream converted from all grouped character sets. The standard polynomial (hexadecimal 0x07), initial value 0x00, no reflection, no post-processing XOR, the obtained 8-bit check value is converted to 2 extended ASCII characters, and the final code consists of 2-bit product code characters, 60-bit feature characters, and 2-bit check bit characters to form a unique 64-character code.

[0066] For example, for the case of a small number of display units of the RGB display unit, such as 50 RGB display units, the magnification coefficient r1 compression encoding: r1 = 1.0213 is mapped to y = round [(1.0213-0.800) / 0.400x1023] = 563, corresponding to binary "1000110011"; group 5 coefficients, and merge into 50-bit binary numbers, converted into 10 32-bit characters (such as "2G8P5X0L3T"). The product code is set to "0B" (2 bits), and the CRC-8 check bit is "6D" (2 bits), combined as "0B + compressed data + 6D" encoding.

[0067] When the number of display units of the RGB display unit is large, such as 2048 RGB display units, 6144 coefficients are included, the coefficients are standardized to ensure that all coefficients are within the range of [0.800, 1.200], and the part exceeding the range is truncated. 8-bit integer mapping: when x = 1.0213, y = round [(1.0213-0.800) / 0.400x255] ≈ 141; when x = 1.0323, y ≈ 148. Binary conversion: y = 141, corresponding to binary is 10001101, and after conversion of all 6144 y values, 49152-bit binary data stream is formed. 128-bit grouping: the binary stream is divided into 128-bit groups, a total of 384 groups. 128-bit character conversion: each group is converted into 18 characters, and 384 groups form a total of 6912 characters. Feature character extraction: 60 feature characters are extracted from 6912 characters at an interval of 108. Check bit generation: the product code is “0C”, which is converted into a byte stream with 6912 characters, and the 8-bit check value 0x7F is calculated by using the CRC-8 algorithm, which is converted into 2 extended ASCII characters “âã”. Encoding combination: the 2 characters “àá” converted from the product code, 60 feature characters, and 2 check bit characters “âã” are combined into a 64-character code “àáâãFj rH.l (JkG#2Xdì...)”.

[0068] The luminance encoding result will be converted into a two-dimensional code, which is used to store the luminance values of each color component of each display unit in the corrected lamp panel RGB display unit. The luminance encoding result is converted into a QR code of Version 4 and above (error correction level H level), i.e. the 64-character code is converted into a QR code of Version 4 and above, which is printed on the designated position of the lamp panel by a laser coding machine, realizing physical storage and quick reading of the correction information.

[0069] In this embodiment, different encoding algorithms are used according to the size of the display unit to improve the encoding efficiency, and the corresponding luminance encoding result is converted into a two-dimensional code, so that the RGB display unit of the lamp panel can read the data by scanning the two-dimensional code when the whole machine is installed, and the current parameters are written to the control unit to update, realizing high consistency display.

[0070] In the present application, the target brightness value of each color component is determined according to the first measured brightness value of each color component under the preset first brightness level and the preset current condition, the influence of the extreme brightness level is avoided, the accuracy of the target brightness value is improved, and when the corresponding target brightness value and the measured brightness value are used to determine the brightness amplification coefficient of the corresponding color component, the accuracy of the brightness amplification coefficient is improved. The current compensation is performed on each display unit according to the brightness amplification coefficient, the adjusted current is obtained, the current compensation is reversely determined, the adaptive adjustment of each color component is realized, the RGB backlight brightness is corrected based on the adjusted current, and the accuracy of the RGB backlight brightness correction is improved.

[0071] Please refer to Figure 3 , Figure 3 is a structure diagram of an RGB backlight brightness correction device provided by an embodiment of the present application. The RGB backlight brightness correction device corresponds to the RGB backlight brightness correction method in the above embodiment. Please refer to the related description in the corresponding embodiment of Figure 2 and Figure 2 for details. For the convenience of description, only the parts related to the present embodiment are shown. As shown in Figure 3 , the RGB backlight brightness correction device 30 includes an acquisition module 31, a first determination module 32, a second determination module 33, and a third determination module 34.

[0072] The acquisition module 31 is configured to acquire the first measured brightness value of each color component of the RGB display unit under the preset first brightness level and the preset current condition.

[0073] The first determination module 32 is configured to determine the target brightness value of each color component of the RGB display unit under the preset first brightness level and the preset current condition according to the first measured brightness value of each color component.

[0074] The second determination module 33 is configured to determine the brightness amplification coefficient of the corresponding color component according to the ratio of the target brightness value of each color component to the first measured brightness value of the corresponding color component.

[0075] The third determination module 34 is configured to adjust the current of each color component based on the brightness amplification coefficient to obtain an adjusted current, and the adjusted current is used to correct the brightness of each color component of the RGB display unit.

[0076] Optionally, the first determination module 32 includes: The sorting unit is configured to sort all the first measured brightness values of the corresponding color component in the RGB display unit from large to small for any color component to obtain a sorting result, and determine a plurality of target display units according to the sorting result.

[0077] The determining unit is configured to determine a first average value of the first measured luminance values of the corresponding color component of all the target display units according to the first measured luminance values of the corresponding color component of each display unit in the plurality of target display units, and determine the target luminance value of the corresponding color component as the first average value.

[0078] Optionally, the second determining module 33 includes: The first collecting unit is configured to collect third measured luminance values of each color component of the lamp panel RGB display unit under a preset second luminance level and a preset current condition.

[0079] The first determining unit is configured to determine second target luminance values of each color component of the RGB display unit under the preset second luminance level and the preset current condition according to the third measured luminance values of each color component.

[0080] The first calculating unit is configured to calculate a ratio of the target luminance value of each color component to the first measured luminance value corresponding to each color component, and determine a first luminance amplification coefficient.

[0081] The second calculating unit is configured to calculate a ratio of the second target luminance value of each color component to the second measured luminance value corresponding to each color component, and determine a second luminance amplification coefficient.

[0082] The second determining unit is configured to determine a luminance amplification coefficient of the corresponding color component as an average value of the first luminance amplification coefficient and the second luminance amplification coefficient of each color component.

[0083] Optionally, the RGB backlight luminance correction device 30 further includes: The fourth determining module is configured to determine second measured luminance values of each color component under a preset first luminance level and an adjusted current condition.

[0084] The fifth determining module is configured to determine an abnormal color component according to the second measured luminance value of each color component and the target luminance value of each color component.

[0085] Optionally, the fifth determining module includes: The third determining unit is configured to determine, for any color component, a level target luminance value corresponding to a plurality of luminance levels according to the target luminance value.

[0086] The second collecting unit is configured to collect a plurality of level measured luminance values of each color component under a plurality of luminance levels based on the adjusted current.

[0087] The fourth determining unit is configured to determine, for any luminance level, a level luminance difference amount under the corresponding luminance level according to the level target luminance value and the level measured luminance value of the luminance level, and determine level luminance difference amounts of all the luminance levels by traversing all the luminance levels.

[0088] The fifth determining unit is configured to calculate the average of the brightness difference amounts of all brightness levels to obtain the difference amount average, and when the difference amount average is greater than a preset brightness difference threshold, determine that the corresponding color component is an abnormal color component.

[0089] Optionally, the fifth determining module further includes: The third acquisition unit is used to acquire, for any color component, the measured chromaticity coordinates of the color component under the adjusted current condition.

[0090] The third calculation unit is used to obtain the standard chromaticity coordinates of the color system components, and calculate the chromaticity difference of the corresponding color system components according to the measured chromaticity coordinates and the standard chromaticity coordinates.

[0091] The sixth determining unit is configured to determine that the corresponding color component is an abnormal color component when the chromaticity difference is greater than a preset chromaticity difference threshold.

[0092] Optionally, the RGB backlight brightness correction device 30 further includes: The correction module is used to correct all abnormal color components to obtain a corrected light board RGB display unit.

[0093] The encoding module is used to encode the brightness value of each color component of each display unit in the calibrated light board RGB display unit to determine the brightness encoding result of the calibrated light board RGB display unit.

[0094] The conversion module is used to convert the brightness encoding result into a QR code, which is used to store the brightness value of each color component of each display unit in the calibrated RGB display unit of the light board.

[0095] It should be noted that the information interaction, execution process, etc. between the above-mentioned units are based on the same concept as the method embodiment of this application. Their specific functions and technical effects can be found in the method embodiment part and will not be repeated here.

[0096] Figure 4 This is a schematic diagram of the structure of a computer device provided in an embodiment of the present application. Figure 4 As shown, the computer device of this embodiment includes: at least one processor ( Figure 4 Only one is shown), a memory, and a computer program stored in the memory and executable on at least one processor, wherein when the processor executes the computer program, the steps in any of the above-mentioned RGB backlight brightness correction method embodiments are implemented.

[0097] The computer device may include, but is not limited to, a processor and a memory. It will be understood by those skilled in the art that Figure 4The computer device is merely an example and does not limit the computer device, which can include more or less components than shown, or combine some components, or have different components, such as a network interface, a display screen, an input device, and the like.

[0098] The processor can be a CPU, and can also be other general-purpose processors, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0099] The memory includes a readable storage medium, an internal memory, and the like. The internal memory can be a memory of the computer device, and provides an environment for running an operating system and computer-readable instructions in the readable storage medium. The readable storage medium can be a hard disk of the computer device, and in other embodiments can also be an external storage device of the computer device, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) card, a Flash Card, and the like. Further, the memory can include both an internal storage unit of the computer device and an external storage device. The memory is used to store an operating system, an application program, a BootLoader, data, and other programs, such as program codes of computer programs. The memory can also be used to temporarily store data that has been output or will be output.

[0100] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above-mentioned division of each functional unit and module is exemplified, and in actual application, the above-mentioned functions can be completed by 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 can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of software functional unit. In addition, the specific names of each functional unit and module are only for easy distinction, and do not limit the protection scope of the present application. The specific working process of the units and modules in the above device can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here. If the integrated unit is realized in the form of 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, all or part of the processes in the above embodiment methods can be completed by a computer program instructing related hardware. The computer program can be stored in a computer readable storage medium. When the processor executes the computer program, the steps of the above method embodiments can be implemented. The computer program includes computer program code, which can be in the form of source code, object code, executable file or some intermediate form. The computer readable medium at least includes any entity or device capable of carrying computer program code, recording medium, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal and software distribution medium. For example, U disk, mobile hard disk, magnetic disk or optical disk, etc. In some jurisdictions, according to legislation and patent practice, computer readable medium cannot be electrical carrier signal and telecommunication signal.

[0101] The above embodiment methods can also be implemented by a computer program product, which, when running on a computer device, causes the computer device to execute the steps of the above method embodiments.

[0102] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described or recorded in detail in a certain embodiment can be referred to the related description of other embodiments.

[0103] Those skilled in the art can understand that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized in electronic hardware or a combination of computer software and electronic hardware. Whether the functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0104] In the embodiments provided by the present application, it should be understood that the disclosed apparatus / computer device and method can be implemented in other ways. For example, the apparatus / computer device embodiments described above are merely schematic. The division of the modules or units is merely a logical function division, and there can be another division manner in actual implementation. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections can be indirect couplings or communication connections through some interfaces, devices or units, and can be electrical, mechanical or in other forms.

[0105] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e. can be located in one place, or can be distributed on a plurality of network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiments.

[0106] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A method for RGB backlight brightness correction, characterized in that: The RGB backlight brightness correction method includes: Collecting the first measured brightness value of each color component of the RGB display unit of the light board under the preset first brightness level and preset current conditions; Determining, according to the first measured brightness value of each color component, a target brightness value of each color component of the RGB display unit under the preset first brightness level and the preset current conditions; Determine a brightness amplification factor of the corresponding color component according to a ratio of a target brightness value of each color component to a first measured brightness value corresponding to each color component; Based on the brightness amplification factor, the current of each color component is adjusted to obtain an adjusted current, and the adjusted current is used to correct the brightness of each color component of the RGB display unit.

2. The RGB backlight brightness correction method according to claim 1, wherein: The determining, based on the first measured brightness value of each color component, of the RGB display unit under the preset first brightness level and the preset current conditions, includes: For any color component, sort all first measured brightness values ​​of the corresponding color component in the RGB display unit from largest to smallest to obtain a sorting result, and determine multiple target display units according to the sorting result; According to the first measured brightness value of the color component corresponding to each display unit in the multiple target display units, a first average value of the first measured brightness values ​​of the color components corresponding to all target display units is determined, and the first average value is determined as the target brightness value of the corresponding color component.

3. The RGB backlight brightness correction method according to claim 1, wherein: Determining the brightness amplification coefficient of the corresponding color system component includes: Collecting the third measured brightness value of each color component of the RGB display unit of the light board under the preset second brightness level and preset current conditions; determining, according to the third measured brightness value of each color component, a second target brightness value of each color component of the RGB display unit under the preset second brightness level and the preset current conditions; Calculating the ratio of the target brightness value of each color component to the first measured brightness value corresponding to each color component to determine a first brightness amplification coefficient; Calculate the ratio of the second target brightness value of each color component to the second measured brightness value corresponding to each color component to determine a second brightness amplification coefficient; An average of the first brightness amplification coefficient and the second brightness amplification coefficient of each color component is determined as the brightness amplification coefficient of the corresponding color component.

4. The RGB backlight brightness correction method according to claim 1, wherein: After obtaining the adjusted current, the method further includes: determining a second measured brightness value of each color component under the preset first brightness level and the adjusted current conditions; Abnormal color components are determined according to the second measured brightness value of each color component and the target brightness value of each color component.

5. The RGB backlight brightness correction method according to claim 4, wherein: Determining abnormal color components includes: For any color component, determining target brightness values ​​corresponding to a plurality of brightness levels according to the target brightness value; Based on the adjusted current, collecting the measured brightness values ​​of the corresponding color components at multiple brightness levels for each color component; For any brightness level, determine the brightness difference amount at the corresponding brightness level according to the target brightness value of the brightness level and the measured brightness value of the brightness level, traverse all brightness levels, and determine the brightness difference amount of all brightness levels; The average of the level brightness difference amounts of all brightness levels is calculated to obtain the difference amount average. When the difference amount average is greater than a preset brightness difference threshold, the corresponding color system component is determined to be an abnormal color system component.

6. The RGB backlight brightness correction method according to claim 4, wherein: The determining of abnormal color components further includes: For any color system component, collecting the measured chromaticity coordinates of the color system component under the adjusted current condition; Obtaining the standard chromaticity coordinates of the color system component, and calculating the chromaticity difference of the corresponding color system component based on the measured chromaticity coordinates and the standard chromaticity coordinates; When the chromaticity difference is greater than a preset chromaticity difference threshold, the corresponding color component is determined to be an abnormal color component.

7. The RGB backlight brightness correction method according to claim 4, wherein: After determining the abnormal color system components, the method further includes: Correct all abnormal color components to obtain the corrected light board RGB display unit; Encoding the brightness value of each color component of each display unit in the corrected light board RGB display unit to determine the brightness encoding result of the corrected light board RGB display unit; The brightness encoding result is converted into a two-dimensional code, and the two-dimensional code is used to store the brightness value of each color component of each display unit in the calibrated light board RGB display unit.

8. An RGB backlight brightness correction device, characterized in that: The RGB backlight brightness correction device comprises: An acquisition module, configured to acquire a first measured brightness value of each color component of the RGB display unit of the light board under a preset first brightness level and a preset current condition; a first determining module, configured to determine, based on a first measured brightness value of each color component, a target brightness value of each color component of the RGB display unit under the preset first brightness level and the preset current conditions; a second determination module, configured to determine a brightness amplification coefficient of the corresponding color component according to a ratio of a target brightness value of each color component to a first measured brightness value corresponding to each color component; The third determining module is configured to adjust the current of each color component based on the brightness amplification coefficient to obtain an adjusted current, wherein the adjusted current is used to correct the brightness of each color component of the RGB display unit.

9. A computer device, characterized in that: The computer device includes a processor, a memory, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the RGB backlight brightness correction method according to any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the RGB backlight brightness correction method according to any one of claims 1 to 7 is implemented.

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