CN116256908B - Calibration method based on miniLED backlight module - Google Patents
Calibration method based on miniLED backlight module Download PDFInfo
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/1306—Details
- G02F1/1309—Repairing; Testing
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- G—PHYSICS
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- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
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- G02F1/133603—Direct backlight with LEDs
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
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Abstract
The invention provides a calibration method based on a miniLED backlight module, which comprises the following steps: shooting a working video stream of a miniLED screen in the process of playing detection videos of the miniLED screen, dividing the working video stream into a plurality of video areas, establishing corresponding light change information, extracting abnormal light change information inconsistent with preset change information and an abnormal video area corresponding to the abnormal light change information, acquiring an abnormal backlight module corresponding to the abnormal video area, controlling the abnormal backlight module to sequentially send out preset colors to acquire display colors corresponding to each preset color, establishing a preset-display corresponding list, and then calibrating the display colors of the abnormal backlight module, wherein the problem that visual fatigue of workers is easy to cause by utilizing naked eyes in a traditional mode is solved by utilizing image analysis instead of manual inspection.
Description
Technical Field
The invention relates to the technical field of miniLED backlight sources, in particular to a calibration method based on a miniLED backlight module.
Background
The miniLED backlight is used as a backlight of the LED panel, a large number of miniLED chips are arranged on the backlight module, an imaging technology of the image quality performance of ultra-high contrast, ultra-high brightness and ultra-high color gamut is realized, the LED panel needs to be calibrated before being put into use, and the working color development quality of the LED panel is guaranteed, but the detection means of the miniLED backlight module still stays at the stage of manual visual detection at present, after the miniLED backlight module is lightened by using a power supply, the quality of the electric miniLED backlight module is detected by adopting a mode of manual visual observation, visual detection is used, eye fatigue is easy to be caused, and the backlight is large in damage to eyes of workers.
Therefore, the invention provides a calibration method based on the miniLED backlight module.
Disclosure of Invention
The calibration method based on the miniLED backlight module utilizes image analysis to replace manual inspection, and solves the problem that visual fatigue of workers is easy to cause missed inspection by visual inspection in the traditional mode.
The invention provides a calibration method based on a miniLED backlight module, which comprises the following steps:
step 1: controlling the miniLED screen to play the detection video, and shooting the working video stream of the miniLED screen in the playing process;
step 2: dividing a working video stream into a plurality of video areas, establishing light change information corresponding to each video area, extracting abnormal light change information inconsistent with preset change information, and extracting an abnormal video area corresponding to the abnormal light change information;
step 3: acquiring an abnormal backlight module corresponding to the abnormal video area, controlling the abnormal backlight module to sequentially send out preset colors to acquire display colors corresponding to each preset color, and establishing a preset-display corresponding list;
step 4: and calibrating the display color of the abnormal backlight module according to the preset-display corresponding list until the display color of the abnormal backlight module is consistent with the preset color.
In one embodiment of the present invention, in one possible implementation,
the step 1 comprises the following steps:
step 11: placing a miniLED screen in a preset shooting area;
step 12: acquiring module attributes of the backlight module, and extracting detection videos from an attribute-video list according to the module attributes;
step 13: controlling a miniLED screen to play a detection video;
step 14: shooting a real-time video stream of the miniLED screen when the detection video is played, and intercepting a working video stream of the miniLED screen from the real-time video stream after the playing is finished.
In one embodiment of the present invention, in one possible implementation,
the step 2 includes:
step 21: dividing a working video stream into a plurality of frames of video images, and respectively acquiring picture color characteristics corresponding to each frame of video image;
step 22: respectively obtaining color saturation corresponding to the characteristics of each color picture, extracting a target video image with highest color saturation, obtaining color distribution information of the target video image, obtaining pixel colors corresponding to different pixel points in the target video image according to the color distribution information, classifying the pixel points with the same pixel colors into one type, and establishing a division rule;
step 23: dividing a working video stream into a plurality of video areas according to a dividing rule, respectively acquiring a first frame image corresponding to each video area, acquiring first light information corresponding to each pixel point in each first frame image, sequentially acquiring light information corresponding to different frame images, and establishing light change information corresponding to each video area;
step 24: dividing the detection video into a plurality of detection areas by using a dividing rule, respectively acquiring detection light information corresponding to each detection area, and establishing preset change information;
step 25: and obtaining a first corresponding relation between the video area and the detection area according to the division rule, obtaining a second corresponding relation between the light change information and the preset change information according to the first corresponding relation, and comparing each video area with the detection area according to the second corresponding relation to obtain abnormal light change information and corresponding abnormal video areas.
In one embodiment of the present invention, in one possible implementation,
the step 3 includes:
step 31: acquiring an abnormal position of the abnormal video area on the working video stream, and positioning a corresponding abnormal backlight module according to the abnormal position to obtain a corresponding module specification;
step 32: according to the module specification, a corresponding module matrix of the specification is established, the abnormal backlight module is controlled to sequentially emit preset colors, and color development results corresponding to the same preset color emitted by the abnormal backlight module are projected into the module matrix to obtain a plurality of color development matrixes;
step 33: performing mutual adaptation training on matrix elements corresponding to the same color development matrix to obtain training colors, obtaining a third corresponding relation between different color development matrixes and different preset colors, and combining a fourth corresponding relation between different color development matrixes and the training colors to obtain display colors corresponding to different preset colors sent by the abnormal backlight module;
step 34: and establishing a preset-display corresponding list according to the corresponding display colors when the abnormal backlight module emits different preset colors.
In one embodiment of the present invention, in one possible implementation,
the step 4 includes:
step 41: analyzing a preset-display corresponding list to obtain color development error values corresponding to the abnormal backlight module when different preset colors are sent out, and matching calibration levels for each preset color according to the color development error values;
step 42: establishing initial calibration parameters and correction parameters for each preset color according to the calibration grade;
step 43: controlling the abnormal backlight module to emit preset colors, collecting first display colors of the abnormal backlight module, and calibrating the first display colors by using corresponding initial calibration parameters to obtain second display colors, so as to obtain first color development similarity between the second display colors and the preset colors;
step 44: when the first display similarity is smaller than the preset similarity, inputting a second display color and a correction parameter into a preset circulation model, correcting the second display color by using the corresponding correction parameter to obtain a third display color and a corresponding second display similarity, and when the second display similarity is smaller than the preset similarity, circularly correcting until the current display similarity is larger than or equal to the preset similarity to obtain a circulation result;
step 45: and obtaining a circulation correction parameter corresponding to each preset color according to the circulation result, obtaining a color compensation parameter of each preset color by combining the corresponding initial correction parameter, respectively carrying out color compensation on the abnormal backlight module by utilizing the color compensation parameter, and marking the abnormal backlight module after compensation as a normal backlight module.
In one embodiment of the present invention, in one possible implementation,
the step 32 includes:
step 321: judging whether the module specification belongs to a rectangular specification, if not, traversing the module specification by using a preset linear edge to obtain a containing rectangle covering the module specification, and establishing a module matrix;
step 322: controlling the abnormal backlight module to sequentially emit preset colors, acquiring a color development result corresponding to each preset color, respectively carrying out edge alignment on each color development result according to the containing rectangle, and establishing a color development result sequence;
step 333: and acquiring row-column structure information of the module matrix, dividing the color development result sequence into a plurality of color development areas according to the row-column structure information, and respectively projecting the color development areas contained in the same regular color development result in the color development result sequence onto element positions corresponding to the module matrix to obtain a corresponding color development matrix.
In one embodiment of the present invention, in one possible implementation,
further comprises:
after the display color of the abnormal backlight module is consistent with the preset color, controlling the miniLED screen to play the detection video again, and shooting the calibration video stream of the miniLED screen in the playing process;
analyzing and calibrating the video stream to obtain the color development information of the miniLED screen, and analyzing and detecting the video stream to obtain the color development information of the miniLED screen;
judging whether the color development information is consistent with the color development information;
and if the color development information is inconsistent with the color development information, carrying out overall calibration on the backlight module until the color development information is consistent with the color development information.
In one embodiment of the present invention, in one possible implementation,
further comprises:
acquiring information different points between the color development information and the color development information;
analyzing each information abnormal point to obtain an abnormal vector corresponding to each information abnormal point, and carrying out vector operation on the abnormal vector to obtain a color development compensation vector of integral calibration;
and carrying out integral calibration on the backlight module based on the color development compensation vector.
In one embodiment of the present invention, in one possible implementation,
further comprises:
when the module specification belongs to the rectangular specification, a module matrix is established according to the rectangular specification;
and controlling the abnormal backlight module to sequentially emit preset colors, acquiring a color development result corresponding to each preset color, and establishing a color development result sequence.
In one embodiment of the present invention, in one possible implementation,
further comprises:
and acquiring a preset-display corresponding list and color compensation parameters, generating historical compensation information, and storing.
The invention has the beneficial effects that: the method comprises the steps of shooting a video stream, analyzing light change information of each video area in the video stream, comparing the light change information with preset change information to clearly obtain abnormal event areas, carrying out secondary detection on a corresponding backlight module to obtain a corresponding relation between color development and color development of the backlight module, and calibrating the color development of the backlight module to enable the display color of the backlight module to be consistent with the preset color.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and drawings.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
fig. 1 is a schematic workflow diagram of a calibration method based on a miniLED backlight module according to an embodiment of the present invention;
fig. 2 is a schematic workflow diagram of step 1 of a calibration method based on a miniLED backlight module according to an embodiment of the present invention;
fig. 3 is a schematic workflow diagram of step 3 of a calibration method based on a miniLED backlight module according to an embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention.
Example 1
The embodiment provides a calibration method based on a miniLED backlight module, as shown in fig. 1, comprising the following steps:
step 1: controlling the miniLED screen to play the detection video, and shooting the working video stream of the miniLED screen in the playing process;
step 2: dividing a working video stream into a plurality of video areas, establishing light change information corresponding to each video area, extracting abnormal light change information inconsistent with preset change information, and extracting an abnormal video area corresponding to the abnormal light change information;
step 3: acquiring an abnormal backlight module corresponding to the abnormal video area, controlling the abnormal backlight module to sequentially send out preset colors to acquire display colors corresponding to each preset color, and establishing a preset-display corresponding list;
step 4: and calibrating the display color of the abnormal backlight module according to the preset-display corresponding list until the display color of the abnormal backlight module is consistent with the preset color.
In the example, the detection video is formed by sequentially arranging different colors and is used for detecting that the miniLED screen plays different display colors;
in the example, the working video stream is obtained by shooting a process of playing a detection video on a miniLED screen by a device with a shooting function;
in this example, the video area represents the result of dividing the working video stream, and the video area is derived from the working video stream;
in this example, the light change information indicates information of displaying different colors when one video area plays different detection videos;
in this example, the abnormal light change information indicates light change information inconsistent with the preset change information;
in this example, the abnormal video area represents a video area in which the light change information in the working video stream is inconsistent with the preset change information;
in this example, the preset-display correspondence list represents a correspondence list between displayed colors when the abnormal backlight module emits a preset color.
The working principle of the technical scheme has the beneficial effects that: the method comprises the steps of shooting a video stream, analyzing light change information of each video area in the video stream, comparing the light change information with preset change information to clearly obtain abnormal event areas, carrying out secondary detection on a corresponding backlight module to obtain a corresponding relation between color development and color development of the backlight module, and calibrating the color development of the backlight module to enable the display color of the backlight module to be consistent with the preset color.
Example 2
On the basis of embodiment 1, the calibration method based on the miniLED backlight module, as shown in fig. 2, the step 1 includes:
step 11: placing a miniLED screen in a preset shooting area;
step 12: acquiring module attributes of the backlight module, and extracting detection videos from an attribute-video list according to the module attributes;
step 13: controlling a miniLED screen to play a detection video;
step 14: shooting a real-time video stream of the miniLED screen when the detection video is played, and intercepting a working video stream of the miniLED screen from the real-time video stream after the playing is finished.
In this example, a shooting device is arranged in a preset shooting area;
in this example, the module attribute includes a color development range of the backlight module;
in this example, the attribute-video list includes backlight modules with different attributes and corresponding lists of detected videos thereof;
in this example, the purpose of extracting the detected video from the attribute-video list according to the module attribute is: because the color development ranges of different backlight modules are different, detection videos consistent with the color development ranges are selected for detection during detection, so that detection errors are avoided, for example: the backlight module A is black and white attribute, the backlight module B is full-color attribute, the backlight module A is a normal backlight module, the red color development defect in the backlight module A is an abnormal backlight module, the detection video 1 is a black and white detection video, the detection video 2 is a full-color detection video, if the detection video 1 is used for detecting the backlight module B, the detection video 2 is used for detecting the backlight module A, the backlight module A can only display black and white, the detection result is abnormal, the backlight module B can display all colors except red, but only black and white in the detection video 2, the detection result is that the backlight module B is normal, and thus, the detection result has deviation.
The working principle of the technical scheme has the beneficial effects that: in order to collect working video streams when the miniLED screen plays detection videos, the miniLED screen is placed in a preset shooting area, then a detection video is matched according to module attributes of the miniLED screen backlight module to play, the working video streams are collected in the playing process, a foundation is provided for subsequent color development analysis of the backlight module, and the miniLED screen is placed in the preset shooting area to ensure that the working video streams contain complete miniLED screens.
Example 3
Based on embodiment 1, the calibration method based on the miniLED backlight module, the step 2, includes:
step 21: dividing a working video stream into a plurality of frames of video images, and respectively acquiring picture color characteristics corresponding to each frame of video image;
step 22: respectively obtaining color saturation corresponding to the characteristics of each color picture, extracting a target video image with highest color saturation, obtaining color distribution information of the target video image, obtaining pixel colors corresponding to different pixel points in the target video image according to the color distribution information, classifying the pixel points with the same pixel colors into one type, and establishing a division rule;
step 23: dividing a working video stream into a plurality of video areas according to a dividing rule, respectively acquiring a first frame image corresponding to each video area, acquiring first light information corresponding to each pixel point in each first frame image, sequentially acquiring light information corresponding to different frame images, and establishing light change information corresponding to each video area;
step 24: dividing the detection video into a plurality of detection areas by using a dividing rule, respectively acquiring detection light information corresponding to each detection area, and establishing preset change information;
step 25: and obtaining a first corresponding relation between the video area and the detection area according to the division rule, obtaining a second corresponding relation between the light change information and the preset change information according to the first corresponding relation, and comparing each video area with the detection area according to the second corresponding relation to obtain abnormal light change information and corresponding abnormal video areas.
In this example, the video image is from a working video stream;
in this example, the picture color characteristics represent color values, color distribution, color brightness, color saturation of display colors on a frame of video image;
in this example, color saturation represents the vividness of the display color on the video image;
in this example, the color distribution information represents a distribution of color differences between different areas on the target video image;
in this example, the pixel color represents the color that the pixel point presents;
in the example, the dividing rule is to divide pixel points with consistent pixel colors into one type, and then establish dividing limits according to dividing results;
in this example, the first frame image represents an image presented in each video area after the first frame image of the working video stream is divided according to a division rule;
in this example, the first ray information represents color and brightness information of a pixel point on the first frame image;
in this example, the light change information represents information with inconsistent front and back colors or brightness, which is formed by light information of different frames of images in the video area;
in this example, the positions of the detection area and the video area are in one-to-one correspondence;
in this example, the preset change information indicates change information established according to the detected video stream, the change information being fixed;
in this example, the first correspondence indicates that the detection area and the video area are in one-to-one correspondence;
in this example, the second correspondence indicates that the preset change information of the detection area and the light change information of the video area are in one-to-one correspondence;
in this example, the abnormal light change information indicates light change information with a similarity of less than 85% corresponding to the predetermined change information.
The working principle of the technical scheme has the beneficial effects that: the working video stream is divided into a plurality of multi-dry-frame video images, the target video image with the highest color saturation is selected according to the picture color characteristics of each video image, so that the color distribution information of the target video image is obtained, the pixel colors of different pixel points can be obtained according to the color distribution information, a division rule can be established based on the same-color pixel classification rule, the working video stream and the detection video stream can be divided by using the division rule, the corresponding light change information and the preset change information are obtained, the preset change information of the light change information is compared, whether the video area is abnormal or not can be judged, the state of each video area can be judged in a local comparison mode, the position of the abnormal video area can be rapidly positioned in the detection process, the basis is made for the follow-up backlight calibration, and the time consumption of the whole work is reduced.
Example 4
On the basis of embodiment 1, the calibration method based on the miniLED backlight module, as shown in fig. 3, the step 3 includes:
step 31: acquiring an abnormal position of the abnormal video area on the working video stream, and positioning a corresponding abnormal backlight module according to the abnormal position to obtain a corresponding module specification;
step 32: according to the module specification, a corresponding module matrix of the specification is established, the abnormal backlight module is controlled to sequentially emit preset colors, and color development results corresponding to the same preset color emitted by the abnormal backlight module are projected into the module matrix to obtain a plurality of color development matrixes;
step 33: performing mutual adaptation training on matrix elements corresponding to the same color development matrix to obtain training colors, obtaining a third corresponding relation between different color development matrixes and different preset colors, and combining a fourth corresponding relation between different color development matrixes and the training colors to obtain display colors corresponding to different preset colors sent by the abnormal backlight module;
step 34: and establishing a preset-display corresponding list according to the corresponding display colors when the abnormal backlight module emits different preset colors.
In this example, the anomaly location represents the location of the anomaly video region on the workflow;
in the example, the abnormal backlight module corresponds to the abnormal position, and the abnormal position of the backlight module causes the abnormal video area;
in this example, the module specification indicates a shape specification of the abnormal backlight;
in this example, the module matrix represents a matrix that can store color information emitted from the backlight module;
in this example, the color development results include: color value, color distribution, color brightness, color saturation of the color;
in this example, the number of color development matrices is related to the number of preset colors, and a color development matrix is established each time a color development result of one preset color is projected into the module matrix;
in this example, training color represents the color that is presented after fusing matrix elements in the color development matrix;
in this example, the display color is a color formed by a fusion of training colors on the same display matrix.
The working principle of the technical scheme has the beneficial effects that: determining the position of an abnormal backlight module according to the abnormal position of an abnormal video area on a working video stream, establishing a module matrix by acquiring the module specification of the abnormal backlight module, controlling the abnormal backlight module to emit preset colors, projecting the color development result into the module matrix, establishing a plurality of color development matrixes, carrying out mutual adaptation training on matrix elements in the same color development matrix, and combining the corresponding relation between the matrix and the color development to obtain the display colors of the color development matrixes, thereby obtaining the corresponding display colors when the abnormal backlight module emits different preset colors, and establishing a preset-display corresponding list to base on subsequent calibration.
Example 5
Based on embodiment 1, the calibration method based on the miniLED backlight module, the step 4, includes:
step 41: analyzing a preset-display corresponding list to obtain color development error values corresponding to the abnormal backlight module when different preset colors are sent out, and matching calibration levels for each preset color according to the color development error values;
step 42: establishing initial calibration parameters and correction parameters for each preset color according to the calibration grade;
step 43: controlling the abnormal backlight module to emit preset colors, collecting first display colors of the abnormal backlight module, and calibrating the first display colors by using corresponding initial calibration parameters to obtain second display colors, so as to obtain first color development similarity between the second display colors and the preset colors;
step 44: when the first display similarity is smaller than the preset similarity, inputting a second display color and a correction parameter into a preset circulation model, correcting the second display color by using the corresponding correction parameter to obtain a third display color and a corresponding second display similarity, and when the second display similarity is smaller than the preset similarity, circularly correcting until the current display similarity is larger than or equal to the preset similarity to obtain a circulation result;
step 45: and obtaining a circulation correction parameter corresponding to each preset color according to the circulation result, obtaining a color compensation parameter of each preset color by combining the corresponding initial correction parameter, respectively carrying out color compensation on the abnormal backlight module by utilizing the color compensation parameter, and marking the abnormal backlight module after compensation as a normal backlight module.
In this example, the display error value represents a color difference between the preset color and the display color;
in the example, the number of calibration levels is 5, namely a level, b level, c level, d level and e level, wherein initial calibration parameters and correction parameters corresponding to the a level are the largest, and calibration parameters and correction parameters corresponding to the e level are the smallest;
in this example, the level e is matched when the display error value is [9, 20], the level d is matched when [21, 30], the level c is matched when [31, 40], the level b is matched when [41, 50], and the level a is matched when [51, 60 ];
in this example, the first display color represents a color that is presented when the abnormal backlight module emits a preset color;
in this example, the second display color represents the color that is presented after the first display color is calibrated using the initial calibration parameters;
in this example, the third display color represents a color that is presented after the second display color is corrected using the correction parameter, and from the third display color, the subsequent colors are all the result of correcting the previous display color using the correction parameter;
in this example, the cycle result includes the nth display color and the cycle correction parameter;
in this example, the cyclic correction parameter represents the sum of correction parameters in performing cyclic correction in the cyclic model;
in this example, the color compensation parameter represents a parameter for compensating and trimming the color of the abnormal backlight module.
The working principle of the technical scheme has the beneficial effects that: the display error value of the abnormal backlight module when different preset colors are sent out is analyzed to grade each preset color, then the corresponding initial calibration parameter and the corresponding correction parameter are matched for the display error value, the display color sent out by the abnormal backlight module is corrected by the initial calibration parameter and the correction parameter, if necessary, the display color sent out by the abnormal backlight module is circularly corrected by the correction parameter, then a color compensation parameter can be generated, the abnormal backlight module is subjected to color compensation by the color compensation parameter, and therefore the abnormal backlight module can be subjected to color calibration, the abnormal backlight module is enabled to be normal, and normal work can be carried out.
Example 6
Based on embodiment 4, the calibration method based on the miniLED backlight module, the step 32, includes:
step 321: judging whether the module specification belongs to a rectangular specification, if not, traversing the module specification by using a preset linear edge to obtain a containing rectangle covering the module specification, and establishing a module matrix;
step 322: controlling the abnormal backlight module to sequentially emit preset colors, acquiring a color development result corresponding to each preset color, respectively carrying out edge alignment on each color development result according to the containing rectangle, and establishing a color development result sequence;
step 333: and acquiring row-column structure information of the module matrix, dividing the color development result sequence into a plurality of color development areas according to the row-column structure information, and respectively projecting the color development areas contained in the same regular color development result in the color development result sequence onto element positions corresponding to the module matrix to obtain a corresponding color development matrix.
In this example, traversing the module specification with a preset straight line edge to obtain a containment rectangle covering the module specification, and establishing the module matrix includes:
copying the module specification into a two-dimensional rectangular coordinate system;
acquiring the vertical direction of the X-axis pointing module specification, and marking the vertical direction as a first moving direction;
the X axis emits a preset X linear edge, the preset X linear edge is controlled to translate along a first moving direction, and a first starting position where the preset X linear edge coincides with the module specification is obtained;
the method comprises the steps of controlling a preset X linear edge to translate along a first moving direction from a starting position to obtain a first ending position where the preset X linear edge is not coincident with a module specification;
acquiring the vertical direction of the Y-axis pointing module specification, and marking the vertical direction as a second moving direction;
a Y axis emits a preset Y linear edge, the preset Y linear edge is controlled to translate along a second moving direction, and a second initial position where the preset Y linear edge coincides with the module specification is obtained;
the preset Y linear edge is controlled to translate along a second moving direction from the initial position, and a second end position where the preset Y linear edge is not coincident with the module specification is obtained;
establishing a containing rectangle according to the first starting position, the first ending position, the second starting position and the second ending position;
establishing a module matrix according to the containing rectangle;
in this example, the edge-fill represents an operation of supplementing the color development result to the specification of the containing rectangle;
in this example, the rank structure information represents rank arrangement of the module matrix;
in this example, the process of dividing the color development result sequence into a plurality of color development areas according to the line and column structure information includes:
and obtaining the row-column number of the module matrix according to the row-column structure information, and dividing the color development result into a plurality of row color development areas and a plurality of column color development areas according to the row-column number.
The working principle of the technical scheme has the beneficial effects that: in order to enable matrix elements of the color development matrix to be more accurate, a corresponding module matrix is built according to module specifications, then color development results when the abnormal backlight module emits preset colors are subjected to edge filling to build a color development result sequence, and then the color development results are divided according to row and column structure information of the module matrix, so that each color development area of the color development results is projected into a corresponding row and column structure, the color development matrix is built, one-to-one correspondence of the matrix elements is realized, and element disorder is effectively avoided.
Example 7
Based on embodiment 1, the calibration method based on the miniLED backlight module further includes:
after the display color of the abnormal backlight module is consistent with the preset color, controlling the miniLED screen to play the detection video again, and shooting the calibration video stream of the miniLED screen in the playing process;
analyzing and calibrating the video stream to obtain the color development information of the miniLED screen, and analyzing and detecting the video stream to obtain the color development information of the miniLED screen;
judging whether the color development information is consistent with the color development information;
and if the color development information is inconsistent with the color development information, carrying out overall calibration on the backlight module until the color development information is consistent with the color development information.
The working principle of the technical scheme has the beneficial effects that: in order to further verify the color development effect of the miniLED screen, after the backlight module is calibrated, the miniLED screen is controlled to play the detection video again, so that the miniLED screen is disturbed to be subjected to secondary detection, and integral calibration is carried out if necessary, until the color development effect of the miniLED screen reaches the target effect, and high-quality use experience is provided for a user.
Example 8
Based on embodiment 7, the calibration method based on the miniLED backlight module further includes:
acquiring information different points between the color development information and the color development information;
analyzing each information abnormal point to obtain an abnormal vector corresponding to each information abnormal point, and carrying out vector operation on the abnormal vector to obtain a color development compensation vector of integral calibration;
and carrying out integral calibration on the backlight module based on the color development compensation vector.
In this example, the information outlier indicates an information difference point between the color development information and the color development information;
in this example, the abnormal vector includes a difference between two information outliers and an information correction direction between the color development information and the color development information, and the correction direction is directed from the color development information to the color development information regardless of whether the difference between the color development information and the color development information is positive or negative.
The working principle of the technical scheme has the beneficial effects that: abnormal vectors corresponding to each abnormal point are determined by analyzing the abnormal points between the color development information and the color development information, then vector operation is carried out to obtain a color development compensation vector for integral calibration of the backlight module, and the backlight module is calibrated integrally by utilizing the vector, so that local over-calibration can be avoided, and the calibration quality is improved effectively.
Example 9
Based on embodiment 6, the calibration method based on the miniLED backlight module further includes:
when the module specification belongs to the rectangular specification, a module matrix is established according to the rectangular specification;
and controlling the abnormal backlight module to sequentially emit preset colors, acquiring a color development result corresponding to each preset color, and establishing a color development result sequence.
The working principle of the technical scheme has the beneficial effects that: when the module specification is rectangular, it shows that no additional containing rectangle is needed to be established, in order to shorten the calibration method, the module matrix is directly established by using the rectangular specification, and the color development result sequence is rapidly established, so that the efficiency of the subsequent calibration work is greatly improved.
Example 10
Based on embodiment 5, the calibration method based on the miniLED backlight module further includes:
and acquiring a preset-display corresponding list and color compensation parameters, generating historical compensation information, and storing.
The working principle of the technical scheme has the beneficial effects that: by storing the preset-display corresponding list and the color compensation parameters, the calibration work of the time can be recorded, the color compensation parameters can be used in the subsequent calibration work process, and the compensation efficiency is improved.
Example 11
Based on embodiment 4, the calibration method based on the miniLED backlight module further includes:
acquiring a plurality of matrix elements contained in the same color development matrix;
acquiring a corresponding element value of each matrix element;
calculating a maximum color value, an average color value and a mean square color value corresponding to each color development matrix according to formulas (1), (2) and (3);
（1）
（2）/>
（3）
wherein,,maximum color value representing the f-th color rendering matrix,/->Representing a maximum function>Represents the matrix element on the f-th color rendering matrix, x represents the first element component of the matrix element, y represents the second element component of the matrix element,/or->Represents the average color value of the f-th color rendering matrix, ">Represents the number of rows of the color matrix, M represents the number of columns of the color matrix, (-) is used>Representing the mean square color value of the f-th color development matrix;
generating training initial parameters for each color development matrix according to the calculation results of the formulas (1), (2) and (3), and performing mutual adaptation training on matrix elements corresponding to the same color development matrix by using the training initial parameters to obtain training colors.
The working principle of the technical scheme has the beneficial effects that: in order to further determine the training colors corresponding to the color matrixes, the maximum color value, the average color value and the mean square color value corresponding to each color matrix are calculated before the mutual adaptation training is carried out, then a training parameter is established for each color matrix for training, the training accuracy is improved, and the effectiveness of the training colors is ensured.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (10)
1. The calibration method based on the miniLED backlight module is characterized by comprising the following steps of:
step 1: controlling the miniLED screen to play the detection video, and shooting the working video stream of the miniLED screen in the playing process;
step 2: dividing a working video stream into a plurality of video areas, establishing light change information corresponding to each video area, extracting abnormal light change information inconsistent with preset change information, and extracting an abnormal video area corresponding to the abnormal light change information;
step 3: acquiring an abnormal backlight module corresponding to the abnormal video area, controlling the abnormal backlight module to sequentially send out preset colors to acquire display colors corresponding to each preset color, and establishing a preset-display corresponding list;
step 4: and calibrating the display color of the abnormal backlight module according to the preset-display corresponding list until the display color of the abnormal backlight module is consistent with the preset color.
2. The calibration method based on the miniLED backlight module as set forth in claim 1, wherein the step 1 includes:
step 11: placing a miniLED screen in a preset shooting area;
step 12: acquiring module attributes of the backlight module, and extracting detection videos from an attribute-video list according to the module attributes;
step 13: controlling a miniLED screen to play a detection video;
step 14: shooting a real-time video stream of the miniLED screen when the detection video is played, and intercepting a working video stream of the miniLED screen from the real-time video stream after the playing is finished.
3. The calibration method based on the miniLED backlight module as set forth in claim 1, wherein the step 2 includes:
step 21: dividing a working video stream into a plurality of frames of video images, and respectively acquiring picture color characteristics corresponding to each frame of video image;
step 22: respectively obtaining color saturation corresponding to the characteristics of each color picture, extracting a target video image with highest color saturation, obtaining color distribution information of the target video image, obtaining pixel colors corresponding to different pixel points in the target video image according to the color distribution information, classifying the pixel points with the same pixel colors into one type, and establishing a division rule;
step 23: dividing a working video stream into a plurality of video areas according to a dividing rule, respectively acquiring a first frame image corresponding to each video area, acquiring first light information corresponding to each pixel point in each first frame image, sequentially acquiring light information corresponding to different frame images, and establishing light change information corresponding to each video area;
step 24: dividing the detection video into a plurality of detection areas by using a dividing rule, respectively acquiring detection light information corresponding to each detection area, and establishing preset change information;
step 25: and obtaining a first corresponding relation between the video area and the detection area according to the division rule, obtaining a second corresponding relation between the light change information and the preset change information according to the first corresponding relation, and comparing each video area with the detection area according to the second corresponding relation to obtain abnormal light change information and corresponding abnormal video areas.
4. The calibration method based on the miniLED backlight module as set forth in claim 1, wherein the step 3 includes:
step 31: acquiring an abnormal position of the abnormal video area on the working video stream, and positioning a corresponding abnormal backlight module according to the abnormal position to obtain a corresponding module specification;
step 32: according to the module specification, a corresponding module matrix of the specification is established, the abnormal backlight module is controlled to sequentially emit preset colors, and color development results corresponding to the same preset color emitted by the abnormal backlight module are projected into the module matrix to obtain a plurality of color development matrixes;
step 33: performing mutual adaptation training on matrix elements corresponding to the same color development matrix to obtain training colors, obtaining a third corresponding relation between different color development matrixes and different preset colors, and combining a fourth corresponding relation between different color development matrixes and the training colors to obtain display colors corresponding to different preset colors sent by the abnormal backlight module;
step 34: and establishing a preset-display corresponding list according to the corresponding display colors when the abnormal backlight module emits different preset colors.
5. The calibration method based on the miniLED backlight module as set forth in claim 1, wherein the step 4 includes:
step 41: analyzing a preset-display corresponding list to obtain color development error values corresponding to the abnormal backlight module when different preset colors are sent out, and matching calibration levels for each preset color according to the color development error values;
step 42: establishing initial calibration parameters and correction parameters for each preset color according to the calibration grade;
step 43: controlling the abnormal backlight module to emit preset colors, collecting first display colors of the abnormal backlight module, and calibrating the first display colors by using corresponding initial calibration parameters to obtain second display colors, so as to obtain first color development similarity between the second display colors and the preset colors;
step 44: when the first display similarity is smaller than the preset similarity, inputting a second display color and a correction parameter into a preset circulation model, correcting the second display color by using the corresponding correction parameter to obtain a third display color and a corresponding second display similarity, and when the second display similarity is smaller than the preset similarity, circularly correcting until the current display similarity is larger than or equal to the preset similarity to obtain a circulation result;
step 45: and obtaining a circulation correction parameter corresponding to each preset color according to the circulation result, obtaining a color compensation parameter of each preset color by combining the corresponding initial correction parameter, respectively carrying out color compensation on the abnormal backlight module by utilizing the color compensation parameter, and marking the abnormal backlight module after compensation as a normal backlight module.
6. The calibration method based on the miniLED backlight module as set forth in claim 4, wherein the step 32 comprises:
step 321: judging whether the module specification belongs to a rectangular specification, if not, traversing the module specification by using a preset linear edge to obtain a containing rectangle covering the module specification, and establishing a module matrix;
step 322: controlling the abnormal backlight module to sequentially emit preset colors, acquiring a color development result corresponding to each preset color, respectively carrying out edge alignment on each color development result according to the containing rectangle, and establishing a color development result sequence;
step 333: and acquiring row-column structure information of the module matrix, dividing the color development result sequence into a plurality of color development areas according to the row-column structure information, and respectively projecting the color development areas contained in the same regular color development result in the color development result sequence onto element positions corresponding to the module matrix to obtain a corresponding color development matrix.
7. The calibration method based on the miniLED backlight module as set forth in claim 1, further comprising:
after the display color of the abnormal backlight module is consistent with the preset color, controlling the miniLED screen to play the detection video again, and shooting the calibration video stream of the miniLED screen in the playing process;
analyzing and calibrating the video stream to obtain the color development information of the miniLED screen, and analyzing and detecting the video stream to obtain the color development information of the miniLED screen;
judging whether the color development information is consistent with the color development information;
and if the color development information is inconsistent with the color development information, carrying out overall calibration on the backlight module until the color development information is consistent with the color development information.
8. The calibration method based on the miniLED backlight module as set forth in claim 7, further comprising:
acquiring information different points between the color development information and the color development information;
analyzing each information abnormal point to obtain an abnormal vector corresponding to each information abnormal point, and carrying out vector operation on the abnormal vector to obtain a color development compensation vector of integral calibration;
and carrying out integral calibration on the backlight module based on the color development compensation vector.
9. The calibration method based on the miniLED backlight module as set forth in claim 6, further comprising:
when the module specification belongs to the rectangular specification, a module matrix is established according to the rectangular specification;
and controlling the abnormal backlight module to sequentially emit preset colors, acquiring a color development result corresponding to each preset color, and establishing a color development result sequence.
10. The calibration method based on the miniLED backlight module as set forth in claim 5, further comprising:
and acquiring a preset-display corresponding list and color compensation parameters, generating historical compensation information, and storing.
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