CN115050312A - LED display screen correction method and device, computer readable medium and display - Google Patents

LED display screen correction method and device, computer readable medium and display Download PDF

Info

Publication number
CN115050312A
CN115050312A CN202210647497.0A CN202210647497A CN115050312A CN 115050312 A CN115050312 A CN 115050312A CN 202210647497 A CN202210647497 A CN 202210647497A CN 115050312 A CN115050312 A CN 115050312A
Authority
CN
China
Prior art keywords
brightness
display module
correction
display
chrominance
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210647497.0A
Other languages
Chinese (zh)
Inventor
冯双磊
解培亮
肖道粲
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Absen Optoelectronic Co Ltd
Original Assignee
Shenzhen Absen Optoelectronic Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen Absen Optoelectronic Co Ltd filed Critical Shenzhen Absen Optoelectronic Co Ltd
Priority to CN202210647497.0A priority Critical patent/CN115050312A/en
Publication of CN115050312A publication Critical patent/CN115050312A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/02—Composition of display devices
    • G09G2300/026—Video wall, i.e. juxtaposition of a plurality of screens to create a display screen of bigger dimensions
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0693—Calibration of display systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Control Of El Displays (AREA)

Abstract

The application belongs to the technical field of display control, and particularly relates to a method and a device for correcting an LED display screen, a computer readable medium and a display. The method comprises the steps of carrying out first brightness correction on each display module; after the first brightness and chroma correction is finished, measuring the brightness and chroma corrected by each display module, and storing the brightness and chroma measurement data into a storage module of the display module; when display modules in different batches are mixed and spliced to form a display screen, bright-chroma measurement data corresponding to each display module are read back, a bright-chroma target value of secondary bright-chroma correction is obtained through screening, and secondary bright-chroma correction is carried out on the display screen according to the bright-chroma target value. Therefore, when the display modules in different batches are mixed and spliced into the display screen, the whole display screen is subjected to secondary correction, so that the brightness difference generated by the products in different batches can be eliminated, the correction difficulty is reduced, and the correction efficiency is improved.

Description

LED display screen correction method and device, computer readable medium and display
Technical Field
The application belongs to the technical field of display control, and particularly relates to a method and a device for correcting an LED display screen, a computer readable medium and a display.
Background
As a novel display technology, the LED display screen is gradually accepted by the market due to the advantages of energy conservation, environmental protection, high brightness and the like, so that the LED display screen is widely applied to the fields of urban media, urban traffic electronic signboards and the like.
The LED display screen comprises a plurality of display modules, and in order to guarantee the product quality of each display module, the brightness and the chroma of each batch of display modules can be corrected when the display modules leave a factory, but the brightness and the chroma of the display modules produced in different batches still can be different. With the vigorous development of large LED display screens, most manufacturers stock finished products composed of products produced in different batches in order to quickly meet the market demand.
When the display screen is formed by splicing the display modules produced in different batches, because the brightness difference exists between the display modules produced in different batches, the integral brightness difference of the display screen formed by splicing is uneven. In the related art, if the whole display screen is corrected again, a corrector with professional skills is required to assemble the screen body according to a predetermined sequence and position, and then the correction equipment is used to correct the whole screen on site.
It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present application and therefore may include information that does not constitute prior art known to a person of ordinary skill in the art.
Disclosure of Invention
The application aims to provide a method and a device for correcting an LED display screen, a computer readable medium and a display, which can eliminate the brightness and chrominance chromatic aberration generated when display screens are formed by splicing different batches of display modules to a certain extent, reduce the correction difficulty and improve the correction efficiency.
Other features and advantages of the present application will be apparent from the following detailed description, or may be learned by practice of the application.
According to an aspect of the embodiments of the present application, there is provided a method for correcting an LED display screen, where the LED display screen includes a plurality of display modules, the method includes:
carrying out first brightness and chroma correction on each display module;
after the first brightness and chroma correction is finished, measuring the brightness and chroma corrected by each display module, and storing the brightness and chroma measurement data into a storage module of the display module;
when display modules in different batches are mixed and spliced to form a display screen, reading back brightness measurement data corresponding to each display module, screening to obtain a brightness target value for secondary brightness correction, and performing secondary brightness correction on the display screen according to the brightness target value.
According to an aspect of the embodiments of the present application, there is provided an LED display screen correction device, the LED display screen includes a plurality of display modules, the device includes:
the first correction module is used for performing first brightness correction on each display module;
the measuring module is used for measuring the brightness after each display module is corrected after the first brightness correction is finished, and storing the brightness measurement data into the storage module of the display module;
and the second correction module is used for reading back the brightness and chrominance measurement data corresponding to each display module when different batches of display modules are mixed and spliced to form a display screen, screening to obtain a brightness and chrominance target value for the second brightness and chrominance correction, and performing the second brightness and chrominance correction on the display screen according to the brightness and chrominance target value.
In some embodiments of the present application, based on the above technical solution, the second correction module is further configured to read back luminance and chrominance measurement data of each display module; calculating a corresponding color gamut range according to the brightness and chrominance measurement data of each display module; comparing the color gamut ranges corresponding to the brightness and chrominance measurement data of each display module, and taking the data corresponding to the minimum color gamut range as the brightness and chrominance target value.
In some embodiments of the application, based on the above technical solution, the second correction module is further configured to perform color gamut space conversion on the luminance and chrominance measurement data of each display module and the luminance and chrominance target value to obtain a conversion coefficient of each display module; and obtaining a second point-by-point correction coefficient of each display module according to the conversion coefficient of each display module, and adjusting the brightness and the chroma of the display module through the second point-by-point correction coefficient so as to perform second brightness and chroma correction on the display screen.
In some embodiments of the present application, based on the above technical solutions, the second correction module is further configured to convert the luminance and chrominance measurement data of each display module into a corresponding color gamut tristimulus value matrix; converting the target brightness value into a target color gamut tristimulus value matrix; and obtaining conversion coefficients of each display module according to the color gamut tristimulus value matrix and the target color gamut tristimulus value matrix, wherein the conversion coefficients are used for converting the color gamut tristimulus value matrix into the target color gamut tristimulus value matrix.
In some embodiments of the present application, based on the above technical solution, the second correction module is further configured to obtain a first point-by-point correction coefficient of each display module; and multiplying the conversion coefficient of each display module by the first point-by-point correction coefficient to obtain a second point-by-point correction coefficient of each display module.
In some embodiments of the present application, based on the above technical solutions, the apparatus further includes a correlation module, configured to obtain a serial number of each display module; and associating the serial numbers of the display modules with the first point-by-point correction coefficients of the display modules and the brightness measurement data of the display modules, and storing the serial numbers of the display modules in a memory.
In some embodiments of the application, based on the above technical solutions, the measurement module is further configured to input the same luminance signal and the same lighting time to each display module, and measure the luminance and chrominance of each display module through a colorimeter to obtain the luminance and chrominance measurement data of each display module.
According to an aspect of the embodiments of the present application, there is provided a computer readable medium, on which a computer program is stored, which when executed by a processor implements the LED display screen correction method as in the above technical solution.
According to an aspect of an embodiment of the present application, there is provided a display including: a processor; and a memory for storing executable instructions of the processor; wherein the processor is configured to execute the LED display screen correction method as in the above technical solution via executing the executable instructions.
According to an aspect of embodiments herein, there is provided a computer program product or computer program comprising computer instructions stored in a computer readable storage medium. The processor of the computer device reads the computer instructions from the computer readable storage medium, and the processor executes the computer instructions, so that the computer device executes the LED display screen correction method in the technical scheme.
In the technical scheme provided by the embodiment of the application, when display modules in different batches are mixed and assembled to form the display screen, the luminance and chrominance measurement value obtained through measurement after the luminance and chrominance correction for the first time can be read back, and the luminance and chrominance measurement value is screened to determine the luminance and chrominance target value of the luminance and chrominance correction for the second time. And then, integrally correcting the display screen according to the brightness target value, so that the brightness of the whole display screen is uniform, and the brightness difference among different display modules is eliminated. When the display modules in different batches are mixed and spliced into the display screen, the whole display screen is subjected to secondary correction, so that the brightness and chroma difference generated by different batches of products can be eliminated. In addition, by adopting the technical scheme of the application, the screen body does not need to be assembled according to the preset sequence and position by a corrector, and then the assembled display screen is corrected for the second time by using the correcting equipment, so that the correcting difficulty is reduced, and the correcting efficiency is also improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 schematically shows a flow of steps of a correction method for an LED display screen according to an embodiment of the present application.
Fig. 2 schematically shows a flow of steps of reading back luminance and chrominance measurement data corresponding to each display module and screening to obtain a luminance and chrominance target value for the second luminance and chrominance correction in an embodiment of the present application.
Fig. 3 schematically illustrates a process flow of performing color gamut space conversion on luminance and chrominance measurement data of each display module and a luminance and chrominance target value to obtain a conversion coefficient of each display module in an embodiment of the present application.
Fig. 4 schematically shows a flow of steps of a correction method for an LED display screen according to another embodiment of the present application.
Fig. 5 schematically shows a block diagram of a structure of an LED display screen correction device provided in an embodiment of the present application.
FIG. 6 schematically illustrates a block diagram of a computer system suitable for use with a display that implements an embodiment of the present application.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the application. One skilled in the relevant art will recognize, however, that the subject matter of the present application can be practiced without one or more of the specific details, or with other methods, components, devices, steps, and so forth. In other instances, well-known methods, devices, implementations, or operations have not been shown or described in detail to avoid obscuring aspects of the application.
The block diagrams shown in the figures are functional entities only and do not necessarily correspond to physically separate entities. I.e. these functional entities may be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor means and/or microcontroller means.
The flowcharts shown in the figures are illustrative only and do not necessarily include all of the contents and operations/steps, nor do they necessarily have to be performed in the order described. For example, some operations/steps may be decomposed, and some operations/steps may be combined or partially combined, so that the actual execution sequence may be changed according to the actual situation.
With the vigorous development of large LED display screens, most manufacturers stock finished products in order to quickly meet the market demand, and thus, part of orders are composed of products in different batches. Although the brightness and the chrominance of each batch of products are corrected during production, the LED of each batch has wavelength and luminance difference due to the characteristics of the LED, in addition, the target value of the brightness and the chrominance of the LED in each time of brightness and chrominance correction of the LED by a screen factory is different, and the brightness and the chrominance of the screen body of a batch order which cannot be brightened are basically completely consistent. Therefore, the brightness difference exists after the correction of products manufactured in different batches is finished.
In order to solve the above problems, in the related art, there are two solutions for different batches of LED display panels, the first solution is to compare color gamuts of orders of different batches and perform single-box correction in a factory; the second solution is to mix different batches of products that have finished calibrating the stock, and generally perform the whole screen calibration on the installation site.
If the two modes are adopted, the problem that the time and labor cost are wasted because all the boxes which are used in different batches are recalibrated by using professional calibration equipment in a factory can be solved. Secondly, the box bodies used in different batches are re-corrected by using professional correction equipment on the screen body installation site, and the operation of professional personnel is needed, so that the time, equipment and labor cost are wasted.
In order to solve the problems, the application provides an LED display screen correction method, which comprises the steps of firstly carrying out first brightness and chrominance correction on each display module; after the first brightness and chroma correction is finished, measuring the brightness and chroma corrected by each display module, and storing the brightness and chroma measurement data into a storage module of the display module; when display modules in different batches are mixed and spliced to form a display screen, bright-chroma measurement data corresponding to each display module are read back, a bright-chroma target value of secondary bright-chroma correction is obtained through screening, and secondary bright-chroma correction is carried out on the display screen according to the bright-chroma target value. Therefore, when the display modules in different batches are mixed and spliced into the display screen, the same brightness target value is used for carrying out secondary correction on the whole display screen, so that the brightness difference generated by products in different batches can be eliminated. Moreover, when the secondary correction is carried out on the display screen, correction personnel do not need to use correction equipment for correction after assembling the screen body according to the preset sequence and the preset position, so that the correction difficulty is reduced, and the correction efficiency is improved.
The following detailed description is provided to a method, an apparatus, a computer readable medium, and a display for correcting an LED display screen according to the present application.
Fig. 1 schematically shows a flow of steps of a correction method for an LED display screen according to an embodiment of the present application. The execution main body of the LED display screen correction method can be terminal equipment or a server. The LED display screen includes a plurality of display modules, as shown in fig. 1, the LED display screen calibration method mainly includes the following steps S101 to S103.
Step S101, performing first brightness correction on each display module.
When each display module is delivered from a factory, the brightness of each display module is corrected, namely, the brightness is corrected for the first time.
And S102, after the brightness and chroma correction for the first time is finished, measuring the brightness and chroma corrected by each display module, and storing the brightness and chroma measurement data into a storage module of the display module.
After the first bright chroma correction, the bright chroma of each display module is measured again, and the measured bright chroma measured value is stored in the storage module of the display module, so that the display module is favorable for secondary correction, data are directly acquired from the storage, convenience of data acquisition is improved, and correction efficiency during secondary correction is improved.
And S103, when the display modules in different batches are mixed and spliced to form the display screen, reading back brightness measurement data corresponding to each display module, screening to obtain a brightness target value for secondary brightness correction, and performing secondary brightness correction on the display screen according to the brightness target value.
When different batches of display modules are mixed and spliced to form the display screen, the brightness value of each display module which is measured again after the brightness value is corrected for the first time is read back, and therefore the brightness value measurement data corresponding to each display module is obtained. And then screening the brightness and chrominance measurement data corresponding to each display module to obtain a brightness and chrominance target value for secondary brightness and chrominance correction, and performing secondary correction on the display screen by adopting the same brightness and chrominance target value for each display module, so that the brightness and chrominance difference of the display screen formed by splicing different batches of display modules is eliminated.
In the technical scheme provided by the embodiment of the application, when display modules in different batches are mixed and assembled to form the display screen, the luminance and chrominance measurement value obtained through measurement after the luminance and chrominance correction for the first time can be read back, and the luminance and chrominance measurement value is screened to determine the luminance and chrominance target value of the luminance and chrominance correction for the second time. And then, integrally correcting the display screen according to the brightness target value, so that the brightness of the whole display screen is uniform, and the brightness difference among different display modules is eliminated. When the display modules of different batches are mixed and spliced into the display screen, the whole display screen is subjected to secondary correction, so that the brightness and chromaticity difference generated by products of different batches can be eliminated. In addition, by adopting the technical scheme of the application, the screen body does not need to be assembled according to the preset sequence and position by a corrector, and then the assembled display screen is corrected for the second time by using the correcting equipment, so that the correcting difficulty is reduced, and the correcting efficiency is also improved.
In some optional embodiments, referring to fig. 2, fig. 2 schematically shows a flow of steps of reading back luminance and chrominance measurement data corresponding to each display module and screening to obtain a luminance and chrominance target value for the second luminance and chrominance correction in an embodiment of the present application. The step of reading back the luminance and chrominance measurement data corresponding to each display module and screening to obtain the luminance and chrominance target value for the second luminance and chrominance correction may specifically include the following steps S201 to S203.
Step S201, reading back the luminance and chrominance measurement data of each display module.
Step S202, calculating a corresponding color gamut range according to the brightness and chrominance measurement data of each display module.
Step S203, comparing the color gamut ranges corresponding to the luminance and chrominance measurement data of each display module, and using the data corresponding to the minimum color gamut range as a luminance and chrominance target value.
Each display module can be an LED lamp panel or an LED box body, and a single LED box body can comprise one or more LED lamp panels. For the LED lamp panel, for example, the LED lamp panel may be provided with a memory.
For the display module, specifically, the display module includes a plurality of pixel points, and a single pixel point includes one or more LEDs, and for the case of a plurality of LEDs, the display module may include three color LEDs of red (R), green (G), and blue (B), or may further include a white (W) LED. The luminance and chrominance measurement data obtained after factory calibration of the display module may be calibrated red, green, blue, and white luminance and chrominance data measured By a colorimeter, such as Rx _ n, Ry _ n, Gx _ n, Gy _ n, Bx _ n, By _ n, Wx _ n, Wy _ n, and WL _ n. Wherein, Rx _ n and Ry _ n are the corrected red coordinates of the nth lamp panel or box measured By the colorimeter, Gx _ n and Gy _ n are the corrected green coordinates of the nth lamp panel or box measured By the colorimeter, Bx _ n and By _ n are the corrected blue coordinates of the nth lamp panel or box measured By the colorimeter, Wx _ n and Wy _ n are the corrected white coordinates of the nth lamp panel or box measured By the colorimeter, and WL _ n is the corrected white brightness of the nth lamp panel or box measured By the colorimeter.
After the brightness and chrominance measurement data of each display module is obtained, the optimal red, green, blue and white coordinates and brightness and chrominance data are automatically screened and calculated according to a preset algorithm to be used as target values, namely the brightness and chrominance target values are obtained. Specifically, the target luminance degree data includes Rx _ target, Ry _ target, Gx _ target, Gy _ target, Bx _ target, By _ target, WL _ target, Wx _ target, and Wy _ target. Wherein, Rx _ target and Ry _ target are red coordinate target values, Gx _ target and Gy _ target are green coordinate target values, Bx _ target and By _ target are blue coordinate target values, WL _ target is target white brightness, and Wx _ target and Wy _ target are white coordinate target values. When determining the target luminance degree data, the luminance degree target value can be determined as follows:
Rx_target＝Rx_min；
Ry_target＝1/2(Ry_max-Ry_min)+Ry_min；
Gx_target＝1/2(Gx_max-Gx_min)+Gx_min；
Gy_target＝Gy_min；
Bx_target＝Bx_max；
By_target＝1/2(By_max-By_min)+By_min；
WL_target＝WL_max；
Wx_target＝1/2(Wx_max-Wx_min)+Wx_min；
Wy_target＝1/2(Wy_max-Wy_min)+Wy_min。
therefore, the data corresponding to the minimum color gamut range is used as the brightness target value, and each display module corresponds to the same brightness target value, so that the brightness of each display module is kept consistent and uniform.
In some optional embodiments, performing a second luminance and chrominance correction on the display screen according to the luminance and chrominance target value includes:
and performing color gamut space conversion on the brightness and chrominance measurement data of each display module and the brightness and chrominance target value to obtain a conversion coefficient of each display module.
And performing color gamut space conversion on the brightness and chrominance measurement data and the target brightness and chrominance data to convert the color gamut corresponding to the brightness and chrominance measurement data into the color gamut corresponding to the target brightness and chrominance data. And performing color gamut space conversion on the brightness and chrominance measurement data and the target brightness and chrominance data to obtain a conversion coefficient.
And obtaining a second point-by-point correction coefficient of each display module according to the conversion coefficient of each display module, and adjusting the brightness of the display module through the second point-by-point correction coefficient so as to perform second brightness correction on the display screen.
And obtaining a second point-by-point correction coefficient of each display module according to the conversion coefficient, and correcting the brightness of each display module through the second point-by-point correction coefficient, so that the brightness chromatic aberration generated by display modules in different batches can be eliminated.
In the technical scheme provided by the embodiment of the application, when the display modules in different batches are mixed and spliced into the display screen, the whole display screen is subjected to secondary correction, so that the brightness difference generated by products in different batches can be eliminated. In addition, by adopting the technical scheme of the application, the screen body does not need to be assembled according to the preset sequence and position by a corrector, and then the assembled display screen is corrected for the second time by using the correcting equipment, so that the correcting difficulty is reduced, and the correcting efficiency is also improved.
In some optional embodiments, referring to fig. 3, fig. 3 schematically illustrates a flow of steps of performing color gamut space conversion on luminance and chrominance measurement data of each display module and a luminance and chrominance target value to obtain a conversion coefficient of each display module in an embodiment of the present application. The color gamut space conversion of the luminance and chrominance measurement data of each display module and the luminance and chrominance target value to obtain the conversion coefficient of each display module may specifically include the following steps S301 to S303.
Step S301, the luminance and chrominance measurement data of each display module is converted into a corresponding color gamut tristimulus value matrix.
Figure BDA0003686585970000091
Wherein, RX _ n, RY _ n and RZ _ n are tristimulus values of red in the original color gamut space; GX _ n, GY _ n and GZ _ n are tristimulus values of green in the original color gamut space; BX _ n, BY _ n, and BZ _ n are tristimulus values of blue in the original gamut space. For the tristimulus values, according to the principle of Grassmann color matching, three primary colors are selected, any one of the primary colors can not be obtained by adding and mixing other two primary colors, such as RGB primary colors, and by selecting a specific white light as a standard and determining the relative brightness unit of the primary colors, the light of other colors can be regarded as being formed by mixing different amounts of three primary color light, and the respective amount of the required primary colors is the tristimulus value.
Step S302, the target luminance value is converted into a tristimulus value matrix of the target color gamut.
Figure BDA0003686585970000101
Wherein, RX _ target, RY _ target and RZ _ target are tristimulus values of red in the target color gamut space; GX _ target, GY _ target and GZ _ target are tristimulus values of green in the target color gamut space; BX _ target, BY _ target, and BZ _ target are tristimulus values of blue in the target color gamut space.
Step S303, obtaining conversion coefficients of each display module according to the color gamut tristimulus value matrix and the target color gamut tristimulus value matrix, wherein the conversion coefficients are used for converting the color gamut tristimulus value matrix into the target color gamut tristimulus value matrix.
The conversion formula between the color gamut tristimulus value matrix and the target color gamut tristimulus value matrix is as follows:
(XYZ_n)*(Conversion coefficient_n)＝(XYZ_target)
wherein, Conversion coefficient _ n is a Conversion coefficient.
Therefore, the luminance and chrominance measurement data and the target luminance and chrominance data are subjected to color gamut space conversion, so that the color gamut corresponding to the luminance and chrominance measurement data is converted into the color gamut corresponding to the target luminance and chrominance data, the problem that color difference exists in displayed luminance and chrominance due to color gamut difference can be solved, and the display module after secondary correction has high luminance and chrominance consistency and uniformity.
In some optional embodiments, obtaining the second point-by-point correction coefficient of each display module according to the conversion coefficient of each display module includes:
acquiring a first point-by-point correction coefficient of each display module;
and multiplying the conversion coefficient of each display module by the first point-by-point correction coefficient to obtain a second point-by-point correction coefficient of each display module.
Therefore, the conversion coefficient is multiplied by the first point-by-point correction coefficient of each display module to obtain the second point-by-point correction coefficient of each display module, so that the brightness of each lamp bead can be adaptively adjusted, and the uniformity of the brightness of the whole display screen is improved.
In some optional embodiments, the method further comprises:
acquiring serial numbers of all display modules;
and correlating the serial numbers of the display modules with the first point-by-point correction coefficients of the display modules and the brightness measurement data of the display modules, and storing the serial numbers of the display modules in a memory.
In this way, the serial number is associated with the first point-by-point correction coefficient and the luminance data and stored in the memory as the post-maintenance backup data. Here, the serial number of the display module may be generated by software, or may be obtained by scanning a label of the display module. The label of the display module may be a paper label or an electronic label, which is not limited herein.
In some optional embodiments, after the first luminance value correction is completed, measuring the corrected luminance value of each display module includes:
and inputting the same brightness signal and the same lighting time to each display module, and measuring the brightness of each display module through a colorimeter to obtain the brightness measurement data of each display module.
Therefore, the same brightness signal and the same lighting time are input into the display module, so that the interference of the external environment during measurement is objectively reduced, the error during measurement is reduced, and the accuracy of the measured data is improved.
Referring to fig. 4, fig. 4 schematically shows a flow of steps of a correction method for an LED display screen according to another embodiment of the present application. The LED display screen correction method may mainly include the following steps S401 to S406.
Step S401, perform a first luminance and chrominance correction on each display module.
When each display module is delivered from a factory, the brightness of each display module is corrected, namely, the brightness is corrected for the first time.
Step S402, after the first brightness and chroma correction is completed, the brightness and chroma corrected by each display module is measured, and the brightness and chroma measurement data is stored in the storage module of the display module.
After the brightness and chroma are corrected for the first time, the brightness and chroma of each display module are measured again, and the measured brightness and chroma values obtained through measurement are stored in the storage module of the display module, so that the data are directly acquired from the storage when the display module is corrected for the second time, convenience in acquiring the data is improved, and correction efficiency during the second time correction is improved.
Step S403, when the display modules in different batches are mixed and spliced to form the display screen, reading back the brightness and chrominance measurement data corresponding to each display module.
Step S404, the brightness and chroma measurement data corresponding to each display module is read back, and the brightness and chroma target value of the second brightness and chroma correction is obtained through screening.
Step S405, performing color gamut space conversion on the luminance and chrominance measurement data of each display module and the luminance and chrominance target value to obtain a conversion coefficient of each display module.
And performing color gamut space conversion on the brightness and chrominance measurement data and the target brightness and chrominance data to convert the color gamut corresponding to the brightness and chrominance measurement data into the color gamut corresponding to the target brightness and chrominance data. And performing color gamut space conversion on the brightness and chrominance measurement data and the target brightness and chrominance data to obtain a conversion coefficient.
Step S406, multiplying the conversion coefficient of each display module by the first point-by-point correction coefficient to obtain a second point-by-point correction coefficient of each display module, and adjusting the brightness of the display module by the second point-by-point correction coefficient.
In the technical scheme provided by the embodiment of the application, when display modules in different batches are mixed and assembled to form the display screen, the luminance and chrominance measurement value obtained through measurement after the luminance and chrominance correction for the first time can be read back, and the luminance and chrominance measurement value is screened to determine the luminance and chrominance target value of the luminance and chrominance correction for the second time. And then, integrally correcting the display screen according to the brightness target value, so that the brightness of the whole display screen is uniform, and the brightness difference among different display modules is eliminated. When the display modules in different batches are mixed and spliced into the display screen, the whole display screen is subjected to secondary correction, so that the brightness and chroma difference generated by different batches of products can be eliminated. In addition, by adopting the technical scheme of the application, the screen body does not need to be assembled according to the preset sequence and position by a corrector, and then the assembled display screen is corrected for the second time by using the correcting equipment, so that the correcting difficulty is reduced, and the correcting efficiency is also improved.
It should be noted that although the various steps of the methods in this application are depicted in the drawings in a particular order, this does not require or imply that these steps must be performed in this particular order, or that all of the shown steps must be performed, to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step execution, and/or one step broken down into multiple step executions, etc.
The following describes embodiments of the apparatus of the present application, which can be used to perform the LED display screen calibration method in the above embodiments of the present application. Fig. 5 schematically shows a block diagram of a structure of an LED display screen correction device provided in an embodiment of the present application. As shown in fig. 5, there is provided an LED display screen correcting apparatus 500 including:
a first correction module 501, configured to perform first luminance and chrominance correction on each display module;
the measuring module 502 is configured to measure the luminance and chrominance values corrected by each display module after the luminance and chrominance value correction for the first time is completed, and store luminance and chrominance value measurement data in the storage module of the display module;
the second correcting module 503 is configured to, when different batches of display modules are mixed and spliced to form a display screen, obtain a luminance and chrominance target value for the second luminance and chrominance correction by reading back luminance and chrominance measurement data corresponding to each display module and screening, and perform the second luminance and chrominance correction on the display screen according to the luminance and chrominance target value.
In some embodiments of the present application, based on the above technical solution, the second correction module 503 is further configured to read back luminance and chrominance measurement data of each display module; calculating a corresponding color gamut range according to the brightness and chrominance measurement data of each display module; and comparing the color gamut ranges corresponding to the brightness and chrominance measurement data of the display modules, and taking the data corresponding to the minimum color gamut range as a brightness and chrominance target value.
In some embodiments of the present application, based on the above technical solution, the second correction module 503 is further configured to perform color gamut space conversion on the luminance and chrominance measurement data of each display module and the luminance and chrominance target value to obtain a conversion coefficient of each display module; and obtaining a second point-by-point correction coefficient of each display module according to the conversion coefficient of each display module, and adjusting the brightness of the display module through the second point-by-point correction coefficient so as to perform second brightness correction on the display screen.
In some embodiments of the present application, based on the above technical solution, the second correction module 503 is further configured to convert the luminance and chrominance measurement data of each display module into a corresponding color gamut tristimulus value matrix; converting the target value of the brightness degree into a tri-stimulus value matrix of a target color gamut; and obtaining conversion coefficients of each display module according to the color gamut tristimulus value matrix and the target color gamut tristimulus value matrix, wherein the conversion coefficients are used for converting the color gamut tristimulus value matrix into the target color gamut tristimulus value matrix.
In some embodiments of the present application, based on the above technical solution, the second correction module 503 is further configured to obtain a first point-by-point correction coefficient of each display module; and multiplying the conversion coefficient of each display module by the first point-by-point correction coefficient to obtain a second point-by-point correction coefficient of each display module.
In some embodiments of the present application, based on the above technical solutions, the apparatus further includes a correlation module, configured to obtain a serial number of each display module; and correlating the serial numbers of the display modules with the first point-by-point correction coefficients of the display modules and the brightness measurement data of the display modules, and storing the serial numbers of the display modules in a memory.
In some embodiments of the application, based on the above technical solution, the measurement module is further configured to input the same luminance signal and the same lighting time to each display module, and measure the luminance and chrominance of each display module through the colorimeter to obtain the luminance and chrominance measurement data of each display module.
The specific details of the LED display screen correction device provided in each embodiment of the present application have been described in detail in the corresponding method embodiment, and are not described herein again.
Fig. 6 schematically shows a block diagram of a computer system for implementing a display according to an embodiment of the present application.
It should be noted that the computer system 600 of the display shown in fig. 6 is only an example, and should not bring any limitation to the function and the scope of the application of the embodiments.
As shown in fig. 6, the computer system 600 includes a Central Processing Unit 601 (CPU) that can perform various appropriate actions and processes according to a program stored in a Read-Only Memory 602 (ROM) or a program loaded from a storage section 608 into a Random Access Memory 603 (RAM). In the random access memory 603, various programs and data necessary for system operation are also stored. The cpu 601, the rom 602 and the ram 603 are connected to each other via a bus 604. An Input/Output interface 606(Input/Output interface, i.e., I/O interface) is also connected to the bus 604.
The following components are connected to the input/output interface 606: an input portion 606 including a keyboard, a mouse, and the like; an output section 607 including a Cathode Ray Tube (CRT), a Liquid Crystal Display (LCD), and the like, a speaker, and the like; a storage section 608 including a hard disk and the like; and a communication section 609 including a network interface card such as a local area network card, modem, or the like. The communication section 609 performs communication processing via a network such as the internet. The driver 610 is also connected to the input/output interface 606 as needed. A removable medium 611 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is mounted on the drive 610 as necessary, so that a computer program read out therefrom is mounted in the storage section 608 as necessary.
In particular, the processes described in the various method flowcharts may be implemented as computer software programs, according to embodiments of the present application. For example, embodiments of the present application include a computer program product comprising a computer program embodied on a computer readable medium, the computer program comprising program code for performing the method illustrated by the flow chart. In such an embodiment, the computer program may be downloaded and installed from a network through the communication section 609, and/or installed from the removable medium 611. The computer program, when executed by the central processor 601, performs various functions defined in the system of the present application.
It should be noted that the computer readable medium shown in the embodiments of the present application may be a computer readable signal medium or a computer readable storage medium or any combination of the two. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples of the computer readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a Read-Only Memory (ROM), an Erasable Programmable Read-Only Memory (EPROM), a flash Memory, an optical fiber, a portable Compact Disc Read-Only Memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the present application, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. In this application, however, a computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wired, etc., or any suitable combination of the foregoing.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams or flowchart illustration, and combinations of blocks in the block diagrams or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
It should be noted that although in the above detailed description several modules or units of the device for action execution are mentioned, such a division is not mandatory. Indeed, the features and functionality of two or more modules or units described above may be embodied in one module or unit, according to embodiments of the application. Conversely, the features and functions of one module or unit described above may be further divided into embodiments by a plurality of modules or units.
Through the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein may be implemented by software, or by software in combination with necessary hardware. Therefore, the technical solution according to the embodiments of the present application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a usb disk, a removable hard disk, etc.) or on a network, and includes several instructions to enable a computing device (which can be a personal computer, a server, a touch terminal, or a network device, etc.) to execute the method according to the embodiments of the present application.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains.
It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims (10)

1. A method for correcting an LED display screen is characterized in that the LED display screen comprises a plurality of display modules, and the method comprises the following steps:
carrying out first brightness and chroma correction on each display module;
after the first brightness and chroma correction is finished, measuring the brightness and chroma corrected by each display module, and storing the brightness and chroma measurement data into a storage module of the display module;
when display modules in different batches are mixed and spliced to form a display screen, reading back brightness measurement data corresponding to each display module, screening to obtain a brightness target value for secondary brightness correction, and performing secondary brightness correction on the display screen according to the brightness target value.
2. The method for correcting the LED display screen according to claim 1, wherein the step of obtaining the luminance and chrominance target values of the second luminance and chrominance correction by reading back the luminance and chrominance measurement data corresponding to each display module and screening comprises:
reading back the brightness and chrominance measurement data of each display module;
calculating a corresponding color gamut range according to the brightness and chrominance measurement data of each display module;
comparing the color gamut ranges corresponding to the brightness and chrominance measurement data of each display module, and taking the data corresponding to the minimum color gamut range as the brightness and chrominance target value.
3. The method for correcting the LED display screen according to claim 1, wherein the second bright-chroma correction of the display screen according to the target value of bright-chroma comprises:
performing color gamut space conversion on the brightness measurement data and the brightness target value of each display module to obtain a conversion coefficient of each display module;
and obtaining a second point-by-point correction coefficient of each display module according to the conversion coefficient of each display module, and adjusting the brightness and the chroma of the display module through the second point-by-point correction coefficient so as to perform second brightness and chroma correction on the display screen.
4. The method for correcting the LED display screen according to claim 3, wherein the performing the color gamut space conversion on the luminance and chrominance measurement data of each display module and the luminance and chrominance target value to obtain the conversion coefficient of each display module comprises:
converting the brightness and chrominance measurement data of each display module into a corresponding color gamut tristimulus value matrix;
converting the target brightness value into a target color gamut tristimulus value matrix;
and obtaining conversion coefficients of each display module according to the color gamut tristimulus value matrix and the target color gamut tristimulus value matrix, wherein the conversion coefficients are used for converting the color gamut tristimulus value matrix into the target color gamut tristimulus value matrix.
5. The method for correcting the LED display screen according to claim 3, wherein the obtaining of the second point-by-point correction coefficient of each display module according to the conversion coefficient of each display module comprises:
acquiring a first point-by-point correction coefficient of each display module;
and multiplying the conversion coefficient of each display module by the first point-by-point correction coefficient to obtain a second point-by-point correction coefficient of each display module.
6. The LED display screen correction method of claim 5, further comprising:
acquiring serial numbers of all display modules;
and associating the serial numbers of the display modules with the first point-by-point correction coefficients of the display modules and the brightness measurement data of the display modules, and storing the serial numbers of the display modules in a memory.
7. The method for correcting the LED display screen according to claim 1, wherein measuring the corrected luminance and chrominance of each display module after the first luminance and chrominance correction is completed comprises:
and inputting the same brightness signal and the same lighting time to each display module, and measuring the brightness of each display module through a colorimeter to obtain the brightness measurement data of each display module.
8. The utility model provides a LED display screen correcting unit which characterized in that, LED display screen includes a plurality of display module assemblies, the device includes:
the first correction module is used for performing first brightness correction on each display module;
the measuring module is used for measuring the brightness and the chroma corrected by each display module after the first brightness and chroma correction is finished, and storing the brightness and chroma measurement data into the storage module of the display module;
and the second correction module is used for reading back the brightness and chrominance measurement data corresponding to each display module when different batches of display modules are mixed and spliced to form a display screen, screening to obtain a brightness and chrominance target value for the second brightness and chrominance correction, and performing the second brightness and chrominance correction on the display screen according to the brightness and chrominance target value.
9. A computer-readable medium, characterized in that the computer-readable medium has stored thereon a computer program which, when being executed by a processor, carries out the LED display screen correction method of any one of claims 1 to 7.
10. A display, comprising:
a processor; and
a memory for storing executable instructions of the processor;
wherein the processor is configured to perform the LED display screen correction method of any one of claims 1 to 7 via execution of the executable instructions.
CN202210647497.0A 2022-06-09 2022-06-09 LED display screen correction method and device, computer readable medium and display Pending CN115050312A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210647497.0A CN115050312A (en) 2022-06-09 2022-06-09 LED display screen correction method and device, computer readable medium and display

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210647497.0A CN115050312A (en) 2022-06-09 2022-06-09 LED display screen correction method and device, computer readable medium and display

Publications (1)

Publication Number Publication Date
CN115050312A true CN115050312A (en) 2022-09-13

Family

ID=83162174

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210647497.0A Pending CN115050312A (en) 2022-06-09 2022-06-09 LED display screen correction method and device, computer readable medium and display

Country Status (1)

Country Link
CN (1) CN115050312A (en)

Similar Documents

Publication Publication Date Title
CN103080999B (en) For having the self-adaptation color correction of the indicating meter of backlight modulation
KR101549326B1 (en) Color conversion device, display device, electronic apparatus and method for color conversion
US11195483B2 (en) Global light compensation in a variety of displays
CN102611897B (en) Method and system for carrying out vision perception high-fidelity transformation on color digital image
US20150364081A1 (en) Image processing apparatus, image processing method, display device, computer program and computer-readable medium
CN109410839B (en) Correction optimization method and device for display screen, electronic equipment and storage medium
US9013502B2 (en) Method of viewing virtual display outputs
CN110660352B (en) Point-to-point correction method, device and system for LED display screen and storage medium
CN104332143B (en) Display device and color conversion method thereof
CN104992691A (en) White balance adjustment method of display system and display system
CN101667416A (en) Method for adjusting and analyzing color temperature and GAMMA of display
CN113270063B (en) Color coordinate calibration method, system, processing device and computer storage medium
CN113223466B (en) Display screen brightness correction method and device and electronic equipment
CN111862880A (en) Method for acquiring multi-color gamma correction table and display control method, device and system
CN105528976A (en) Device and method for automatically measuring and calibrating gamma curve of display screen
CN106782347B (en) Correct the method and device of LED backlight display white point
CN114203086B (en) Thermal compensation correction method, device and equipment
CN109410889B (en) White balance adjusting method and device and electronic equipment
CN115050312A (en) LED display screen correction method and device, computer readable medium and display
CN105306917B (en) Low gray level white balance control method, control system and display
TW201337903A (en) Method of introducing white brightness parameter of display panel into white optical feature based on display panel for calculating gray-level white balance gain value to increase its gray-level white balance adjustment precision
CN112071257B (en) LED screen correction method and device, storage medium and LED screen
CN114266745A (en) Image brightness value determination method and device, electronic equipment and storage medium
CN1543227B (en) A method for correcting chroma space transformation of panel display screen
TWI438765B (en) A system and a method for introducing the three primary color luminance parameters of the display panel into gray scale white balance gain values ​​calculated based on the white optical characteristics of the display panel to improve the accuracy of its gray scale white balance

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination