CN113889028A

CN113889028A - Correction method and device for display screen box body

Info

Publication number: CN113889028A
Application number: CN202111117536.8A
Authority: CN
Inventors: 李坤; 余义江; 李小明; 夏建平; 王次平
Original assignee: Huizhou Absen Optoelectronic Co Ltd
Current assignee: Huizhou Absen Optoelectronic Co Ltd
Priority date: 2021-09-23
Filing date: 2021-09-23
Publication date: 2022-01-04

Abstract

The embodiment of the application provides a method and a device for correcting a display screen box body, wherein the method comprises the following steps: respectively carrying out single-box correction on N display screen boxes, wherein N is a positive integer; measuring the brightness and the chromaticity of the first display screen box body to obtain a first brightness value and a first color coordinate of the first display screen box body, wherein the first display screen box body is any one of the N display screen box bodies; generating a correction coefficient in the case that the first luminance value does not fall within the set luminance value range and/or the first color coordinate does not fall within the set color coordinate section; and correcting the first display screen box body according to the correction coefficient. The embodiment of the application can ensure the consistency between the corrected box body and the box body.

Description

Correction method and device for display screen box body

Technical Field

The application relates to the technical field of communication, in particular to a method and a device for correcting a display screen box body.

Background

At present, a Light Emitting Diode (LED) display screen has the characteristics of high brightness, high luminous efficiency, bright color, high contrast, short response time, wide working temperature range, low energy consumption, and the like, and is widely applied to stage display devices, advertisement display devices, data visualization display devices, and commercial display devices.

When the large-scale LED display screen is installed, the LED display screen is formed by splicing a plurality of small display screen box bodies. Each display screen box body adopts a modular design. The splicing mode of the display screen box body adopting the modular design is flexible and variable, so that display screens with various required sizes can be obtained. The LED display screen is formed by splicing the box bodies, and the box bodies are formed by splicing the modules. The module is composed of a lamp bead and a drive Integrated Circuit (IC). The production and manufacture of the module are finished by an LED display screen factory, and the current general production process of the LED display screen is as follows: IC surface mounting, IC surface reflow soldering, lamp surface mounting, lamp surface reflow soldering, module assembly and box assembly. The luminous source of the LED display screen module is an LED lamp bead, and the LED display screen production process and the LED lamp bead determine the final produced display effect of the LED display screen. Under some conditions, the process flow is not controlled in place, the difference between LED lamp bead incoming material batches is large, the produced LED display screen can be caused, the color difference occurs between the modules, and the color difference seriously influences the effect of the finished LED display screen. And the device can not be repaired by a maintenance means and can only be repaired by a correction method.

In the current LED display screen point-by-point correction method, bright and chroma data of each pixel of the LED display screen are collected through a camera, and the bright and chroma of each lamp bead is adjusted through a software algorithm. However, the adjustment in this way cannot be accurate because the brightness of each bead is collected by a camera. Therefore, the display consistency between the box body and the box body after correction cannot be ensured. Especially, the box body with chromatic aberration exists between the module and the module, and during correction, the uniformity of display of a single box body can only be ensured, and the uniformity of display between the box body and the box body cannot be ensured. Therefore, the current point-by-point correction method of the LED display screen is only suitable for correcting screen bodies with consistent display between modules before correction. And a box body for displaying chromatic aberration is arranged between the modules, and the consistency between the box body and the box body after correction cannot be ensured by the correction method.

Disclosure of Invention

The embodiment of the application provides a method and a device for correcting a display screen box body, which can ensure the consistency between the box body and the box body after correction.

A first aspect of an embodiment of the present application provides a method for correcting a display screen box, including:

respectively carrying out single-box correction on N display screen boxes, wherein N is a positive integer;

measuring the brightness and the chromaticity of a first display screen box body to obtain a first brightness value and a first color coordinate of the first display screen box body, wherein the first display screen box body is any one of the N display screen box bodies;

generating a correction coefficient in the case that the first luminance value does not fall within a set luminance value range and/or the first color coordinate does not fall within a set color coordinate interval;

and correcting the first display screen box body according to the correction coefficient.

Optionally, the method further includes:

collecting a monochrome image containing first pixel points of the first display screen box body, wherein the monochrome image is any one of a red image, a green image and a blue image, and the first pixel points are any one of all the pixel points of the first display screen box body;

detecting the brightness value and the chromatic value of the first pixel point;

carry out the single box body to N display screen box body respectively and rectify, include:

analyzing the brightness value and the chromatic value of the first pixel point to generate a compensation coefficient of the first pixel point;

and correcting the brightness and the chromaticity of the first pixel point according to the compensation coefficient of the first pixel point.

Optionally, the analyzing the luminance value and the chromatic value of the first pixel point to generate the compensation coefficient of the first pixel point includes:

determining a brightness difference value between the brightness value of the first pixel point and the brightness value of the reference pixel point and determining a chromaticity difference value between the chromaticity value of the first pixel point and the chromaticity value of the reference pixel point under the condition that the brightness value of the first pixel point is different from the brightness value of the reference pixel point and the chromaticity value of the first pixel point is different from the chromaticity value of the reference pixel point;

and generating a compensation coefficient of the first pixel point according to the brightness difference value and the chrominance difference value.

Optionally, the measuring the brightness and the chromaticity of the first display screen box body includes:

and under the condition that the first display screen box body is lighted in a single color, measuring the brightness and the chromaticity of the first display screen box body through a colorimeter.

Optionally, if the single color includes red, the set brightness value range is a set brightness value range corresponding to the red, and the set color coordinate interval is a set color coordinate interval corresponding to the red;

if the single color comprises green, the set brightness value range is the set brightness value range corresponding to the green, and the set color coordinate interval is the set color coordinate interval corresponding to the green;

if the single color comprises blue, the set brightness value range is the set brightness value range corresponding to the blue, and the set color coordinate interval is the set color coordinate interval corresponding to the blue.

Optionally, the generating a correction coefficient when the first luminance value does not fall within a set luminance value range and/or the first color coordinate does not fall within a set color coordinate interval includes:

generating a luminance correction coefficient in a case where the first luminance value does not fall within a set luminance value range and the first color coordinate falls within a set color coordinate section;

and generating a luminance degree correction coefficient in the case that the first luminance value does not fall within a set luminance value range and the first color coordinate does not fall within a set color coordinate section.

Optionally, the correcting the first display screen box according to the correction coefficient includes:

and correcting all pixel points of the first display screen box body according to the correction coefficient.

A second aspect of the embodiments of the present application provides a correction device for a display screen box, including a correction module and a measurement module;

the correction module is used for respectively carrying out single-box correction on N display screen boxes, wherein N is a positive integer;

the measurement module is used for measuring the brightness and the chromaticity of a first display screen box body to obtain a first brightness value and a first color coordinate of the first display screen box body, wherein the first display screen box body is any one of the N display screen box bodies;

the correction module is further used for generating a correction coefficient under the condition that the first brightness value does not fall into a set brightness value range and/or the first color coordinate does not fall into a set color coordinate interval;

the correction module is further used for correcting the first display screen box body according to the correction coefficient.

Optionally, the correction device of the display screen box further includes an image acquisition module and an image detection module;

the image acquisition module is used for acquiring a monochrome image containing first pixel points of the first display screen box body, the monochrome image is any one of a red image, a green image and a blue image, and the first pixel points are any one of all the pixel points of the first display screen box body;

the image detection module is used for detecting the brightness value and the chromatic value of the first pixel point;

the correction module is right N display screen boxes carry out single-box correction respectively, and the correction module comprises:

Optionally, the analyzing, by the correcting module, the luminance value and the chromatic value of the first pixel point to generate a compensation coefficient of the first pixel point includes:

A third aspect of embodiments of the present application provides a correction module, including a processor and a memory, where the memory is used to store a computer program, and the computer program includes program instructions, and the processor is configured to call the program instructions to execute some or all of the step instructions in the first aspect of embodiments of the present application.

A fourth aspect of embodiments of the present application provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program for electronic data exchange, where the computer program makes a computer perform part or all of the steps as described in the first aspect of embodiments of the present application.

A fifth aspect of embodiments of the present application provides a computer program product, wherein the computer program product comprises a computer program operable to cause a computer to perform some or all of the steps as described in the first aspect of embodiments of the present application. The computer program product may be a software installation package.

The correction method of the display screen box body in the embodiment of the application can comprise the following steps: respectively carrying out single-box correction on N display screen boxes, wherein N is a positive integer; measuring the brightness and the chromaticity of the first display screen box body to obtain a first brightness value and a first color coordinate of the first display screen box body, wherein the first display screen box body is any one of the N display screen box bodies; generating a correction coefficient under the condition that the first brightness value does not fall into the set brightness value range and/or the first color coordinate does not fall into the set color coordinate interval; and correcting the first display screen box body according to the correction coefficient. The correcting unit of display screen box of this application embodiment, can carry out the single box respectively at N display screen boxes and rectify the back, carry out the measurement of luminance and colourity to every display screen box, thereby luminance value and the color coordinate according to every display screen box generate correction coefficient, rectify every display screen box, guarantee that the luminance of every display screen box all falls into and sets for the luminance value scope, the color coordinate of every display screen box all falls into and sets for the color coordinate interval, thereby guarantee the uniformity between display screen box and the display screen box after the correction.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an LED display device according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a correction device for a display screen box according to an embodiment of the present disclosure;

FIG. 3 is a schematic structural diagram of another calibration apparatus for a display screen box according to an embodiment of the present disclosure;

fig. 4 is a schematic flowchart of a method for correcting a display screen box according to an embodiment of the present disclosure;

FIG. 5 is a schematic flowchart of another method for calibrating a display screen box according to an embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of a calibration module according to an embodiment of the present application.

Detailed Description

The terms "first," "second," and the like in the description and claims of the present application and in the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an LED display device according to an embodiment of the present disclosure. As shown in fig. 1, the LED display device may include a plurality of LED display screen boxes, and each LED display screen box may be composed of a plurality of LED display screen modules. The module is composed of a lamp bead and a drive Integrated Circuit (IC). The production and manufacture of the module are finished by an LED display screen factory, and the current general production process of the LED display screen is as follows: IC surface mounting, IC surface reflow soldering, lamp surface mounting, lamp surface reflow soldering, module assembly and box assembly. The luminous source of the LED display screen module is an LED lamp bead, and the production process of the LED display screen module and the LED lamp bead determine the final produced display effect of the LED display screen. Under some conditions, due to the fact that the process flow is not controlled in place and the difference between LED lamp bead incoming material batches is large, the produced LED display screen is caused, color difference occurs between the modules, and the color difference seriously influences the effect of the finished LED display screen module. And the device can not be repaired by a maintenance means and can only be repaired by a correction method.

The current LED display screen adopts a point-by-point correction method, acquires brightness and chrominance data of each pixel of the LED display screen through a camera, and adjusts the brightness and chrominance of each lamp bead through a software algorithm. However, the adjustment in this way cannot be accurate because the brightness of each bead is collected by a camera. Therefore, the display consistency between the box body and the box body after correction cannot be ensured. Especially, the box body with chromatic aberration exists between the module and the module, and during correction, the uniformity of display of a single box body can only be ensured, and the uniformity of display between the box body and the box body cannot be ensured. Therefore, the current point-by-point correction method of the LED display screen is only suitable for correcting screen bodies with consistent display between modules before correction. And a box body for displaying chromatic aberration is arranged between the modules, and the consistency between the box body and the box body after correction cannot be ensured by the correction method.

Referring to fig. 2, fig. 2 is a schematic structural diagram of a calibration device for a display screen box according to an embodiment of the present application. As shown in fig. 2, the calibration apparatus 100 of the display screen box may include a calibration module 11 and a measurement module 12;

the correction module 11 is configured to perform single-box correction on N display screen boxes (such as 21, 22, and … 2N shown in fig. 2), where N is a positive integer;

the measurement module 12 is configured to measure luminance and chromaticity of a first display screen box to obtain a first luminance value and a first color coordinate of the first display screen box, where the first display screen box is any one of the N display screen boxes;

the correction module 11 is further configured to generate a correction coefficient when the first luminance value does not fall within a set luminance value range and/or the first color coordinate does not fall within a set color coordinate interval;

the correction module 11 is further configured to correct the first display screen box according to the correction coefficient.

In the embodiment of the present application, the calibration device 100 of the display screen box is used for calibrating the display device 200. When the correction module 11 respectively performs single-box correction on the N display screen boxes, the correction module can correct the pixel points in each display screen box in the N display screen boxes.

The measurement module 12 may perform a luminance measurement and a chrominance measurement for each of the N display screen boxes. The measurement module 12 measures the overall brightness and the overall chromaticity of the display screen box. The measured color coordinates may reflect the overall color temperature of the first display screen box after it is lit.

The measurement module 12 measures the brightness and the chromaticity of the first display screen box body to obtain a first brightness value and a first color coordinate of the first display screen box body. When the first display screen box body is used for measuring the brightness and the chromaticity, the first display screen box body needs to be lightened, and all pixel points of the first display screen box body can be controlled to keep the same brightness and color. When the first display screen box body is lightened, the brightness of the first display screen box body can be adjusted to be maximum, and the color is adjusted to be a single color (such as pure red, blue, green and the like).

The display screen box of this application embodiment can constitute by display module assembly, and display module assembly can be LED display module assembly. The LED display module may be composed of LED lamp beads and a driving Integrated Circuit (IC).

The correcting unit of display screen box of this application embodiment, can carry out the single box respectively at N display screen boxes and rectify the back, carry out the measurement of luminance and colourity to every display screen box, thereby luminance value and the colour coordinate according to every display screen box generate correction coefficient, rectify every display screen box, guarantee that the luminance of every display screen box all falls into and sets for the luminance value scope, the colour coordinate of every display screen box all falls into and sets for the colour coordinate interval, thereby guarantee the even uniformity of the bright colourity between the display screen box in the N display screen box after the correction and the display screen box.

Optionally, the measuring module 12 includes a colorimeter, and the measuring module 12 measures the brightness and the chromaticity of the first display screen box, including:

in the case where the first display screen box is lit in a single color, the measurement module 12 measures the luminance and the chromaticity of the first display screen box by the colorimeter.

Wherein, after the first display screen box is lighted by the single color, the colorimeter can measure the brightness and the chromaticity of the whole first display screen box after the first display screen box is lighted by the single color. The whole brightness and the whole chromaticity of the display screen box body can be accurately measured through the colorimeter, so that the correction effect between the box bodies is improved, and the uniformity of the chromaticity between the box bodies is ensured.

The single color may include any one of your red, blue, green. The brightness and the chromaticity of each display screen box body can be measured under the condition that the three single colors are lightened, so that the brightness and the chromaticity of each display screen box body under the three single colors can be corrected, and other colors can be obtained by combining the three single colors as long as the correction of the three single colors (red, blue and green) is accurate, so that the correction effect of the whole color display of the display screen box body is improved.

Wherein, the corresponding set color coordinate intervals of different single colors are different. The corresponding set brightness value ranges may be the same or different.

Due to the different sensitivities of human eyes to different colors, the set brightness value ranges corresponding to different colors are different. For example, if human eyes are sensitive to green, the set brightness value range corresponding to green may be set relatively low, and if human eyes are not sensitive to blue, the set brightness value range corresponding to blue may be set relatively high. Specifically, the middle value of the set luminance value range corresponding to green (the middle value may be an average value of both the upper limit value and the lower limit value of the range) may be smaller than the middle value of the set luminance value range corresponding to red, and the middle value of the set luminance value range corresponding to red may be smaller than the middle value of the set luminance value range corresponding to blue.

Because the red, blue and green are located in different areas at the color coordinates, no intersection exists, and the set color coordinate intervals corresponding to different single colors are different.

According to the embodiment of the application, the correction can be respectively carried out when the single color is red, blue and green, so that the correction effect of the whole color display of the display screen box body is improved.

Optionally, the correcting module 11 generates a correction coefficient when the first luminance value does not fall within a set luminance value range and/or the first color coordinate does not fall within a set color coordinate interval, where the correction coefficient includes:

the correction module 11 generates a luminance correction coefficient when the first luminance value does not fall within a set luminance value range and the first color coordinate falls within a set color coordinate interval;

the correction module 11 generates a luminance correction coefficient when the first luminance value does not fall within a set luminance value range and the first color coordinate does not fall within a set color coordinate range.

In the implementation of the present application, under the condition that the first luminance value does not fall into the set luminance value range and the first color coordinate falls into the set color coordinate interval, the correction module 11 generates the luminance correction coefficient, and only needs to perform luminance correction on the pixel point of the first display screen box. Under the condition that the first luminance value does not fall into the set luminance value range and the first color coordinate does not fall into the set color coordinate interval, the correction module 11 generates a luminance and chrominance correction coefficient, and luminance correction and chrominance correction need to be performed on the pixel point of the first display screen box.

After the measurement module 12 obtains the first luminance value and the first color coordinate of the first display screen box, the first luminance value and the first color coordinate of the first display screen box may be uploaded to the correction module 11 in a wireless communication or wired communication manner. The calibration module 11 determines whether the first luminance value falls within a set luminance value range, and determines whether the first color coordinate falls within a set color coordinate range. The set luminance value range and the set color coordinate section may be values set as needed. For example, the set luminance value range may be set to 600 to 605 nit (nit), and the set color coordinate interval may be determined according to the color of the first display screen box when lit (when measuring the chromaticity of the first display screen box). If the color of the first display screen box body when being lighted is red, the corresponding set color coordinate interval can be (0.665-0.675, 0.325-0.335), wherein 0.665-0.675 is the coordinate interval of the X axis of the color coordinate, and 0.325-0.335 is the coordinate interval of the Y axis of the color coordinate; if the color of the first display screen box body when being lightened is green, the corresponding set color coordinate interval can be (0.205-0.215, 0.705-0.715), wherein 0.205-0.215 is the coordinate interval of the X axis of the color coordinate, and 0.705-0.715 is the coordinate interval of the Y axis of the color coordinate; if the color of the first display screen box body when being lighted is blue, the corresponding set color coordinate interval can be (0.135-0.145, 0.075-0.085), wherein 0.135-0.145 is the coordinate interval of the X axis of the color coordinate, and 0.075-0.085 is the coordinate interval of the Y axis of the color coordinate.

If the first brightness value falls within the set brightness value range and the first color coordinate falls within the set color coordinate interval, it indicates that the first display screen box body does not need to be corrected.

And if the first brightness value does not fall into the set brightness value range and/or the first color coordinate does not fall into the set color coordinate interval, generating a correction coefficient, correcting the first display screen box body according to the correction coefficient, measuring the brightness value of the first display screen box body to fall into the set brightness value range corresponding to the single color after the corrected first display screen box body is lighted by the single color, and measuring the color coordinate of the first display screen box body to fall into the set color coordinate interval corresponding to the single color.

The correction module corrects the first display screen box body according to the correction coefficient, and can correct all pixel points of the first display screen box body. For example, the correction coefficient may include a luminance correction coefficient. For example, when each pixel point of the first display screen box displays pure red, the set brightness value range is 600-605 nits, and the set color coordinate interval is (0.665-0.675, 0.325-0.335)). If the first measured brightness value of the first display screen box is 634 nits and the first color coordinate is (0.67, 0.33), the color temperature of the first display screen box in pure red is not required to be adjusted, only the brightness is required to be adjusted, and the brightness correction coefficient can be set to be a-0.9495, R_out＝a*R_in，R_inFor the luminance value before correction, R_outIs the brightness value after correction; if the first measured brightness value of the first display screen box is 634 nits and the first color coordinate is (0.65, 0.36), not only the brightness of the first display screen box but also the color temperature of the first display screen box in pure red needs to be adjusted. Because every pixel all comprises three lamp pearls of red, green, blue, can control the luminance and the colour of whole pixel through adjusting the luminance of three lamp pearls, under the condition of not having the correction, when this pixel needs to show pure red, this pixel only has red lamp pearl to light, and green and blue lamp pearl do not light. However, if the red light emitted by the red light bead is not pure due to the production process, the red light bead needs to be corrected, and when the pixel point needs to display pure red, the red light bead needs to be lightened, and the green light bead and/or the blue light bead needs to be lightened, so that the color of the whole pixel point is close to pure red. At this time, the luminance correction R may be performed according to the following formula_out＝a₁₁*R_in+a₂₁*G_in+a₃₁*B_in；R_inThe brightness value of pure red, R, of the first display screen box before correction_outThe brightness value of pure red after correction of the first display screen box G_inThe brightness value of the first display screen box before correction is pure green, B_inFor the brightness value of pure blue of the first display screen cabinet before correction, a₁₁、a₂₁、a₃₁Respectively, corresponding correction coefficients. According to the embodiment of the application, under the condition that the first brightness value does not fall into the set brightness value range and the first color coordinate does not fall into the set color coordinate interval, the correction module generates the brightness correction coefficient, and performs brightness correction and chromaticity correction on the pixel point of the first display screen box bodyWhen the single color correction is performed, besides the single color (for example, red) lamp beads, lamp beads of other colors need to be lightened, so that the displayed single color is more pure, and the chromaticity correction effect is improved.

When each pixel point of the first display screen box body displays pure green or pure blue, the correction method is similar to the pure red, and the description is omitted here.

After the correction module 11 generates the correction coefficient, the first display screen box may be corrected by the controller of the first display screen box according to the correction coefficient. The controller of the first display screen box body can adjust the luminous intensity of the first display screen box body through the control system or the video signal corrector so as to achieve the uniformity of the brightness and the chroma of the box body. The correction module 11 may include the above-described controller and the above-described video signal corrector.

Optionally, the correcting module 11 corrects the first display screen box according to the correction coefficient, including:

the correction module 11 corrects all the pixel points of the first display screen box according to the correction coefficient. When the first display screen box body is lighted by a single color, all pixel points of the first display screen box body can be corrected to be the same color and the same brightness, and the uniformity of the overall brightness and the overall chromaticity of the first display screen box body is improved.

The correcting unit of display screen box of this application embodiment is at the in-process that measures and rectifies first display screen box, can all light and measure and rectify after pure red at all pixel points of first display screen, can also all light and measure and rectify after pure green at all pixel points of first display screen, can also all light and measure and rectify after pure blue at all pixel points of first display screen, first display screen box is measured and is rectified and can include the measurement and the correction of three kinds of pure colors, the order of above-mentioned three-step measurement and correction can be adjusted at will. The method can measure and correct the pure color of the red, green and blue lamp beads of each pixel point during display, thereby ensuring the uniformity of the brightness and the chromaticity of the first display screen box body and other display screen box bodies during display of different colors.

Referring to fig. 3, fig. 3 is a schematic structural diagram of another correction device for a display screen box according to an embodiment of the present application. As shown in fig. 3, the calibration apparatus 100 of the display screen box may further include an image capturing module 13 and an image detecting module 14.

The image acquisition module 13 is configured to acquire a monochrome image including first pixel points of the first display screen box, where the monochrome image is any one of a red image, a green image, and a blue image, and the first pixel points are any one of all the pixel points of the first display screen box;

the image detection module 14 is configured to detect a luminance value and a chrominance value of the first pixel point;

the correction module 11 is right the N display screen boxes respectively carry out single-box correction, including:

In this application, the monochrome image may include an image in which all the lighted pixels of the first display screen box are of the same color. For example, all the lighted pixels of the first display screen box are red images. When the single-box correction is carried out on the first display screen box, the correction can be carried out when the monochromatic image is a red image, a green image and a blue image respectively, and then the correction effect of the whole color display of the display screen box is improved.

The image capturing module 13 may include a camera, and the camera may capture a first pixel point including the first display screen box to obtain a monochrome image. When the camera shoots the first pixel point of the first display screen box body, other pixel points of the first display screen box body can be shot.

The first pixel is one of all lighted pixels in the first display screen box, and the lighted pixel can also be called a luminous pixel.

In some possible embodiments, all the pixels of the first display screen box may be lit and all of the pixels are in the same color (e.g., one of red, green, and blue), and the collected monochromatic image may include an image of all the pixels of the first display screen box when the monochromatic image is lit.

In some possible embodiments, all of the partial pixels of the first display screen box may be lit and all of the partial pixels are in the same color (e.g., one of red, green, and blue), and the collected monochromatic image may include an image of the partial pixels of the first display screen box when the monochromatic image is lit. The partial pixel points can be pixel points displayed in an interlaced mode or pixel points displayed in an interlaced mode, and images of the partial pixel points when the single color is lightened can be single color images of any two adjacent pixel points which are not lightened simultaneously. On the one hand, because the camera can not gather so many lamp pearls, can not gather the lamp pearl of whole display screen box, the camera is the image of gathering partial pixel at every turn, and resolution ratio requirement to the camera is lower relatively, can reduce the requirement to the resolution ratio of camera. On the other hand, because some pixel points can be interlaced display pixel points, also can be spaced display pixel points, can reduce the pixel and the pixel between the interference of the lamp pearl.

The image detection module 14 can detect the brightness and chromaticity of each pixel in the monochrome image. By adopting the high-resolution camera, each luminous pixel point of the first display screen box body can be clearly shot, so that the brightness value and the chromatic value of each luminous pixel point of the first display screen box body can be accurately detected. Wherein the chromaticity value may comprise a color temperature or a color coordinate.

The correction module 11 may analyze the luminance value and the chrominance value of the first pixel point to generate a compensation coefficient of the first pixel point; and correcting the brightness and the chromaticity of the first pixel point according to the compensation coefficient of the first pixel point. Similarly, the calibration module 11 may calibrate each pixel point of the first display screen box.

determining a brightness difference value between the brightness value of the first pixel point and the brightness value of the reference pixel point and determining a chromaticity difference value between the chromaticity value of the first pixel point and the chromaticity value of the reference pixel point under the condition that the brightness value of the first pixel point is different from the brightness value of the reference pixel point and the chromaticity value of the first pixel point is different from the chromaticity value of the reference pixel point; generating a compensation coefficient of the first pixel point according to the brightness difference value and the chrominance difference value;

determining a brightness difference value between the brightness value of the first pixel point and the brightness value of the reference pixel point under the condition that the brightness value of the first pixel point is different from the brightness value of the reference pixel point and the chromatic value of the first pixel point is the same as the chromatic value of the reference pixel point; and generating a compensation coefficient of the first pixel point according to the brightness difference.

In the embodiment of the application, if the brightness value of the first pixel point is the same as that of the reference pixel point, the brightness of the first pixel point is not required to be compensated, and if the chromatic value of the first pixel point is the same as that of the reference pixel point, the chromatic value of the first pixel point is not required to be compensated, so that the single-box correction efficiency is improved.

Determining a brightness difference value between the brightness value of the first pixel point and the brightness value of the reference pixel point under the condition that the brightness value of the first pixel point is different from the brightness value of the reference pixel point; and under the condition that the chromatic value of the first pixel point is different from that of the reference pixel point, determining the chromatic value difference value of the chromatic value of the first pixel point and that of the reference pixel point, and generating the compensation coefficient of the first pixel point according to the brightness difference value and the chromatic value difference value.

The generation mode of the compensation coefficient of the first pixel point is similar to the generation mode of the correction coefficient. For example, when the first pixel point and the reference pixel point both display pure red light, if the luminance value of the reference pixel point is 600 nits, the luminance value of the first pixel point is 500, and the chromaticity of the first pixel point is the same as that of the reference pixel point, the compensation coefficient of the first pixel point is 1.2, R₁’＝a₁*R₁，R₁The brightness value, R, before the first pixel point is corrected₁' is the brightness value after the first pixel point is corrected, a₁The compensation coefficient is the compensation coefficient of the first pixel point. When the first pixel point and the reference pixel point both display pure red light, if the brightness value of the reference pixel point is 600 nits, the brightness value of the first pixel point is 500, and the chromaticity (color temperature or color coordinate) of the first pixel point is different from the chromaticity (color temperature or color coordinate) of the reference pixel point, the red light emitted by the first pixel point is not pure when the first pixel point displays the pure red light, so that not only the red lamp beads of the first pixel point need to be lightened, but also the green lamp beads and/or the blue lamp beads of the first pixel point need to be lightened, and the color of the whole pixel point is close to the pure red. At this time, R₁’＝a₁₁*R₁+a₂₁*G₁+a₃₁*B₁；R₁Is the brightness value of pure red, R, of the first pixel point before correction₁' is the brightness value of pure red after the first pixel point is corrected, G₁The brightness value of the first pixel point before correction is pure green, B₁Is the brightness value of pure blue before correction of the first pixel point, a₁₁、a₂₁、a₃₁Respectively, corresponding correction coefficients. The method and the device for determining the brightness difference value of the first pixel point and the reference pixel point can determine the brightness difference value of the first pixel point and the reference pixel point under the condition that the brightness value of the first pixel point is different from the brightness value of the reference pixel point; the chromatic value of the first pixel point is different from that of the reference pixel pointUnder the condition, the chromaticity difference value of the chromaticity value of the first pixel point and the chromaticity value of the reference pixel point is determined, and therefore the compensation coefficient of the first pixel point is generated according to the brightness difference value and the chromaticity difference value. When the single box body is corrected, each pixel point can be independently corrected according to different compensation coefficients, some pixel points do not need to be corrected (the brightness value of the pixel point is the same as that of the reference pixel point, the chromatic value of the pixel point is the same as that of the reference pixel point), some pixel points only need to be subjected to brightness correction (the brightness value of the pixel point is different from that of the reference pixel point, the chromatic value of the pixel point is the same as that of the reference pixel point), some pixel points need to be subjected to brightness correction and chromatic correction (the brightness value of the pixel point is different from that of the reference pixel point, the chromatic value of the pixel point is different from that of the reference pixel point), and therefore the brightness and the color uniformity of all the pixel points in the corrected display screen box body are guaranteed.

According to the embodiment of the application, each pixel point needing to be corrected of the first display screen box body can be corrected. The reference pixel points can be pixel points of the sample box or pixel points of the calibrated display screen box body. The sample box is a standard display screen box body, and the chroma and the brightness of pixel points in the sample box are standard values.

In one embodiment, the luminance values and the chrominance values of the reference pixels may be stored in the memory of the correction module 11 in advance.

In another embodiment, the luminance value and the chrominance value of the reference pixel point may be obtained by detecting the pixel point of the sample box or the calibrated pixel point of the display screen box by the image detection module 14 after the camera shoots the pixel point.

Referring to fig. 4, fig. 4 is a schematic flowchart illustrating a method for calibrating a display screen box according to an embodiment of the present application. As shown in fig. 4, the method is used for calibrating the display device 200 including N display screen boxes in fig. 2, and the method may include the following steps:

401, the correction module respectively performs single-box correction on the N display screen boxes, where N is a positive integer.

When the correction module respectively carries out single-box correction on the N display screen boxes, abnormal pixel points in each display screen box in the N display screen boxes can be corrected.

402, the measuring module measures the brightness and the chromaticity of the first display screen box body to obtain a first brightness value and a first color coordinate of the first display screen box body, wherein the first display screen box body is any one of the N display screen box bodies.

The measuring module measures the whole brightness and the whole chroma of the first display screen box body. The measured color coordinates may reflect the overall color temperature of the first display screen box after it is lit.

And 403, generating a correction coefficient by the correction module when the first brightness value does not fall within the set brightness value range and/or the first color coordinate does not fall within the set color coordinate interval.

And 404, the correction module corrects the first display screen box body according to the correction coefficient.

After the measuring module measures the first brightness value and the first color coordinate of the first display screen box body, the first brightness value and the first color coordinate of the first display screen box body can be uploaded to the correcting module in a wired communication or wireless communication mode.

The specific implementation of steps 401 to 404 may refer to the embodiment of the apparatus shown in fig. 2, and is not described herein again.

In the embodiment of the application, can carry out the single box respectively at N display screen boxes and rectify the back, carry out the measurement of luminance and colourity to every display screen box, thereby produce the correction coefficient according to the luminance value and the color coordinate of every display screen box, rectify every display screen box, guarantee that the luminance of every display screen box all falls into and sets for the luminance value scope, the color coordinate of every display screen box all falls into and sets for the color coordinate interval, thereby guarantee the even uniformity of the bright colourity between the display screen box in the N display screen boxes after rectifying and the display screen box.

Referring to fig. 5, fig. 5 is a schematic flowchart illustrating another method for calibrating a display screen box according to an embodiment of the present application. Fig. 5 is obtained on the basis of fig. 4, and as shown in fig. 5, the method may include the following steps:

501, the image acquisition module acquires a monochrome image including a first pixel point of the first display screen box, the monochrome image is any one of a red image, a green image and a blue image, and the first pixel point is any one of all the pixel points of the first display screen box.

502, the image detection module detects the brightness value and the chromatic value of the first pixel point.

503, the calibration module analyzes the luminance value and the chrominance value of the first pixel point to generate a compensation coefficient of the first pixel point, and calibrates the luminance and the chrominance of the first pixel point according to the compensation coefficient of the first pixel point.

And 504, the measuring module measures the brightness and the chromaticity of the first display screen box body to obtain a first brightness value and a first color coordinate of the first display screen box body, wherein the first display screen box body is any one of the N display screen box bodies.

The correction module generates a correction coefficient 505 when the first luminance value does not fall within the set luminance value range and/or the first color coordinate does not fall within the set color coordinate range.

And 506, the correction module corrects the first display screen box body according to the correction coefficient.

After the image acquisition module acquires the monochromatic image containing the first pixel points of the first display screen box body, the monochromatic image containing the first pixel points of the first display screen box body can be transmitted to the image detection module in a wired communication or wireless communication mode, and after the image detection module detects the brightness value and the chromatic value of the first pixel points, the brightness value and the chromatic value of the first pixel points can be uploaded to the correction module in a wired communication or wireless communication mode.

The specific implementation of steps 504 to 506 may refer to steps 402 to 404 shown in fig. 4, which is not described herein again.

The specific implementation of steps 501 to 506 can refer to the embodiment of the apparatus shown in fig. 3, and is not described herein again.

Optionally, the measuring module measures the brightness and the chromaticity of the first display screen box, and includes:

and under the condition that the first display screen box body is lighted in a single color, the measurement module measures the brightness and the chromaticity of the first display screen box body through a colorimeter.

Optionally, the generating, by the correction module, a correction coefficient when the first luminance value does not fall within a set luminance value range and/or the first color coordinate does not fall within a set color coordinate interval includes:

in the case that the first luminance value does not fall within a set luminance value range and the first color coordinate falls within a set color coordinate interval, the correction module generates a luminance correction coefficient;

in the case where the first luminance value does not fall within a set luminance value range and the first color coordinate does not fall within a set color coordinate section, the correction module generates a luminance-chrominance correction coefficient.

Optionally, the correcting module corrects the first display screen box according to the correction coefficient, including:

and the correction module corrects all pixel points of the first display screen box body according to the correction coefficient.

The specific implementation of the method may refer to the embodiment of the apparatus shown in fig. 2 or fig. 3, which is not described herein again.

According to the correction method of the display screen box body, after the N display screen box bodies are respectively subjected to single-box body correction, the brightness and the chromaticity of each display screen box body are measured, so that the correction coefficient is generated according to the brightness value and the color coordinate of each display screen box body, each display screen box body is corrected, the brightness of each display screen box body is ensured to fall into the set brightness value range, the color coordinate of each display screen box body falls into the set color coordinate range, and the consistency between the corrected display screen box body and the display screen box body is ensured.

Referring to fig. 6, fig. 6 is a schematic structural diagram of a calibration module according to an embodiment of the present disclosure, as shown in fig. 6, the calibration module 600 includes a processor 601 and a memory 602, and the processor 601 and the memory 602 may be connected to each other through a communication bus 603. The communication bus 603 may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The communication bus 603 may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 6, but this is not intended to represent only one bus or type of bus. The memory 602 is used for storing a computer program comprising program instructions, and the processor 601 is configured to call the program instructions, wherein the program comprises a program for executing part or all of the steps executed by the correction module in the method shown in fig. 4-5.

The processor 601 may be a general purpose Central Processing Unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of programs according to the above schemes.

The Memory 602 may be a Read-Only Memory (ROM) or other type of static storage device that can store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that can store information and instructions, an Electrically Erasable Programmable Read-Only Memory (EEPROM), a Compact Disc Read-Only Memory (CD-ROM) or other optical Disc storage, optical Disc storage (including Compact Disc, laser Disc, optical Disc, digital versatile Disc, blu-ray Disc, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to these. The memory may be self-contained and coupled to the processor via a bus. The memory may also be integral to the processor.

In addition, the calibration module 600 may further include a communication module 604, wherein the communication module 604 may be a wireless communication module such as a bluetooth module or a WiFi module, or may be a wired communication module.

In the embodiment of the application, can carry out the single box after the correction respectively at N display screen boxes, carry out the measurement of luminance and colourity to every display screen box to luminance value and the color coordinate generation correction coefficient according to every display screen box, correct every display screen box, guarantee that the luminance of every display screen box all falls into and sets for the luminance value scope, the color coordinate of every display screen box all falls into and sets for the color coordinate interval, thereby guarantee the uniformity between display screen box and the display screen box after the correction.

Embodiments of the present application also provide a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for electronic data exchange, and the computer program enables a computer to execute part or all of the steps of any one of the display screen box calibration methods described in the above method embodiments.

It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present application is not limited by the order of acts described, as some steps may occur in other orders or concurrently depending on the application. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required in this application.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one type of division of logical functions, and there may be other divisions when actually implementing, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of some interfaces, devices or units, and may be an electric or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit may be implemented in the form of hardware, or may be implemented in the form of a software program module.

The integrated units, if implemented in the form of software program modules and sold or used as stand-alone products, may be stored in a computer readable memory. Based on such understanding, the technical solution of the present application may be substantially implemented or a part of or all or part of the technical solution contributing to the prior art may be embodied in the form of a software product stored in a memory, and including several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method described in the embodiments of the present application. And the aforementioned memory comprises: various media capable of storing program codes, such as a usb disk, a read-only memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and the like.

Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by associated hardware instructed by a program, which may be stored in a computer-readable memory, which may include: flash memory disks, read-only memory, random access memory, magnetic or optical disks, and the like.

The foregoing detailed description of the embodiments of the present application has been presented to illustrate the principles and implementations of the present application, and the above description of the embodiments is only provided to help understand the method and the core concept of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. A correction method of a display screen box body is characterized by comprising the following steps:

2. The method of claim 1, further comprising:

3. The method of claim 2, wherein analyzing the luminance value and the chrominance value of the first pixel to generate the compensation coefficient of the first pixel comprises:

4. The method of claim 1, wherein said measuring the luminance and the chrominance of the first display screen box comprises:

5. The method of claim 4,

if the single color comprises red, the set brightness value range is the set brightness value range corresponding to the red, and the set color coordinate interval is the set color coordinate interval corresponding to the red;

6. The method according to claim 1, wherein generating a correction coefficient in case the first luminance value does not fall within a set luminance value range and/or the first color coordinate does not fall within a set color coordinate interval comprises:

7. The method of claim 1, wherein the correcting the first display screen box according to the correction factor comprises:

8. A correction device of a display screen box body is characterized by comprising a correction module and a measurement module;

9. The correction device of the display screen box body according to claim 8, further comprising an image acquisition module and an image detection module;

10. The apparatus of claim 9, wherein the calibration module analyzes the luminance value and the chrominance value of the first pixel point to generate the compensation coefficient of the first pixel point, and comprises: