A COB module selection method based on color difference and related devices

Abstract

The present application discloses a method for selecting a COB module based on color difference and a related device, the method comprising: obtaining the tristimulus values ​​and the original RGBW matrix of the current COB single module through a preset camera and a preset color brightness collector; performing normal correction calculation on the original RGBW matrix according to the tristimulus values ​​and the correction target value matrix to obtain a corrected COB single module; obtaining the rotational visual angle angularity information of the corrected COB single module under different preset rotation angles through a preset color brightness collector; calculating the rotational visual angle angularity gear according to the rotational visual angle angularity information and the normal target value in the correction target matrix; selecting the COB module based on the rotational visual angle angularity gear and the preset gear span to obtain an optimized COB module large screen. The present application can solve the technical problem that the existing COB module large screen has serious color difference between different viewing angles and is prone to mosaics, which not only affects the user experience but also causes material loss.

Description

Technical Field

[0001] The present application relates to the technical field of COB module splicing, and in particular to a COB module selection method based on color difference and related devices. Background Art

[0002] At the end of 2021, the Ministry of Industry and Information Technology and the Central Propaganda Department decided to launch the "100 Cities, 1,000 Screens" ultra-high-definition video project. The most critical and cost-intensive component of this project is the display screen, which differs from the monitors we use in everyday life in two key ways: high resolution, reaching 4K or even exceeding 8K; and large physical size, exceeding 100 inches or even 200 inches. Due to the 100-inch maximum physical size limit of LCD screens, traditional LCDs cannot meet these ultra-large screen requirements, making spliced ​​screens the best alternative. While LCD and DLP spliced ​​screens suffer from gaps, low brightness, and narrow viewing angles, which limit their application scenarios, LED spliced ​​screens offer the best solution. COB spliced ​​screens offer superior stability, enhanced protection, improved visual friendliness, and minimal moiré compared to SMDs. These advantages make COB spliced ​​screens the preferred solution for information visualization in the "100 Cities, 1,000 Screens" initiative and other large-screen applications, such as public security, transportation, banking, energy, and the military.

[0003] However, COB screens have long faced a thorny issue: severe color difference from side viewing angles after the COB screen is lit. This significantly impacts the yield rate of the COB module and also affects the viewing experience of end users. Once this color difference is severe, the large COB screen composed of these modules will create a mosaic effect when viewed from left or right, affecting the display and communication of information. The typical approach is to simply discard these modules, resulting in material loss. However, due to the limitations of existing technology in the chip placement and surface processing, this problem cannot be completely resolved. Summary of the Invention

[0004] The present application provides a method and related devices for selecting a COB module based on color difference, which are used to solve the technical problem that the existing COB module large screen has serious color difference between different viewing angles and is prone to mosaics, which not only affects the user experience but also causes material loss.

[0005] In view of this, the first aspect of the present application provides a method for selecting a COB module based on color difference, comprising:

[0006] Obtain the tristimulus values ​​and the original RGBW matrix of the current COB single module through a preset camera and a preset color brightness collector, respectively. The original RGBW matrix includes RGBW brightness values ​​and RGBW chromaticity values;

[0007] Perform normal correction calculation on the original RGBW matrix according to the tristimulus values ​​and the correction target value matrix to obtain a corrected COB single module;

[0008] The preset color brightness collector is used to respectively obtain the rotational viewing angle information of the calibrated COB single module at different preset rotation angles, wherein the preset rotation angles include a left rotation angle and a right rotation angle;

[0009] Calculating a rotational view angular difference gear according to the rotational view angular degree information and the normal target value in the correction target matrix, wherein the rotational view angular difference gear includes a left view angular difference gear and a right view angular difference gear;

[0010] The COB module is selected based on the rotation viewing angle difference gear and the preset gear span to obtain an optimized COB module large screen.

[0011] Preferably, the method of obtaining the tristimulus values ​​and the original RGBW matrix of the current COB single module by a preset camera and a preset color and brightness collector respectively includes:

[0012] Initialize all current devices, including the current COB single module, the preset camera, and the preset color and brightness collector;

[0013] The shooting parameters of the preset camera are optimized and adjusted, wherein the shooting parameters include micro focus, aperture and shutter time.

[0014] Preferably, the method further comprises performing normal correction calculation on the original RGBW matrix according to the tristimulus values ​​and the correction target value matrix to obtain a corrected COB single module, and then further comprising:

[0015] Auditing and verifying the corrected COB single module according to the normal target value in the corrected target matrix to obtain a module deviation value;

[0016] If the module deviation value is within the preset deviation range, the calibration is qualified.

[0017] Preferably, the COB module is selected based on the rotation viewing angle difference gear and the preset gear span to obtain an optimized COB module large screen, including:

[0018] The rotational visual angle difference gear is attached as a binning label on the back of the current COB single module to obtain a binning module set;

[0019] According to the preset gear span and the current splicing screen requirements, the target COB module is selected from the graded module set, and the optimized COB module large screen is spliced.

[0020] A second aspect of the present application provides a COB module selection device based on color difference, comprising:

[0021] An information acquisition unit is used to obtain the tristimulus values ​​and the original RGBW matrix of the current COB single module through a preset camera and a preset color and brightness collector, respectively. The original RGBW matrix includes RGBW brightness values ​​and RGBW chromaticity values;

[0022] A normal correction unit, configured to perform normal correction calculation on the original RGBW matrix according to the tristimulus values ​​and the correction target value matrix to obtain a corrected COB single module;

[0023] The deflection angle detection unit is used to obtain the rotational viewing angle information of the calibrated COB single module under different preset rotation angles through the preset color brightness collector, and the preset rotation angles include left rotation angle and right rotation angle;

[0024] a gear calculation unit, configured to calculate a rotational view angular difference gear according to the rotational view angular degree information and a normal target value in the correction target matrix, wherein the rotational view angular difference gear includes a left view angular difference gear and a right view angular difference gear;

[0025] The module selection unit is used to select the COB module based on the rotation viewing angle color difference gear and the preset gear span to obtain an optimized COB module large screen.

[0026] Preferably, it also includes:

[0027] An initialization unit, configured to initialize all current devices, including the current COB single module, the preset camera, and the preset color and brightness collector;

[0028] The parameter adjustment unit is used to optimize the state of the shooting parameters of the preset camera, where the shooting parameters include micro focus, aperture and shutter time.

[0029] Preferably, it also includes:

[0030] A calibration audit unit, configured to audit and verify the calibration COB single module according to the normal target value in the calibration target matrix to obtain a module deviation value;

[0031] If the module deviation value is within the preset deviation range, the calibration is qualified.

[0032] Preferably, the module selection unit is specifically used to:

[0033] The rotational visual angle difference gear is attached as a binning label on the back of the current COB single module to obtain a binning module set;

[0034] According to the preset gear span and the current splicing screen requirements, the target COB module is selected from the graded module set, and the optimized COB module large screen is spliced.

[0035] The present application provides a COB module selection device based on color difference in three aspects, the device including a processor and a memory;

[0036] The memory is used to store program code and transmit the program code to the processor;

[0037] The processor is used to execute the color difference-based COB module selection method described in the first aspect according to the instructions in the program code.

[0038] In a fourth aspect, the present application provides a computer-readable storage medium, which is used to store program code, and the program code is used to execute the color difference-based COB module selection method described in the first aspect.

[0039] It can be seen from the above technical solutions that the embodiments of the present application have the following advantages:

[0040] In the present application, a COB module selection method based on color difference is provided, including: obtaining the tristimulus values ​​and the original RGBW matrix of the current COB single module through a preset camera and a preset color brightness collector, the original RGBW matrix including RGBW brightness values ​​and RGBW chromaticity values; performing normal correction calculation on the original RGBW matrix according to the tristimulus values ​​and the correction target value matrix to obtain a corrected COB single module; obtaining the rotational visual angle information of the corrected COB single module under different preset rotation angles through a preset color brightness collector, the preset rotation angles including left rotation angles and right rotation angles; calculating the rotational visual angle color difference gear according to the rotational visual angle color difference information and the normal target value in the correction target matrix, the rotational visual angle color difference gear including left visual angle color difference gear and right visual angle color difference gear; selecting the COB module based on the rotational visual angle color difference gear and the preset gear span to obtain an optimized COB module large screen.

[0041] The color difference-based COB module selection method provided by this application performs normal correction processing on each current COB single module through a camera and a color brightness collector, which can ensure the uniformity of the subsequent data analysis benchmark; then, data analysis is performed on the chromaticity information at different viewing angles, and the color difference gear of each COB single module is calculated. Selecting the module according to the preset gear span can ensure that the selected modules are all within a certain color difference range, thereby avoiding the mosaic problem caused by the serious color difference of different viewing angles and improving the combination quality of the COB module large screen. Therefore, this application can solve the technical problem that the existing COB module large screen has serious color difference of different viewing angles, which is prone to mosaics, not only affecting the user experience, but also causing material loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 A flowchart of a method for selecting a COB module based on color difference provided in an embodiment of the present application;

[0043] Figure 2 A schematic diagram of the structure of a COB module selection device based on color difference provided in an embodiment of the present application;

[0044] Figure 3 Schematic diagram of the hardware structure of the COB single module calibration system provided for this application example;

[0045] Figure 4 Schematic diagram of the hardware structure of the COB single-module gear position detection and analysis system provided for this application example;

[0046] The accompanying drawings are:

[0047] 101 industrial camera; 102 first interface; 103 first tripod; 104 first triangular rotatable platform; 105 first COB single module; 106 module calibration position; 107 first module display platform; 108 first conveying platform; 109 position of the calibrated COB single module; 110 calibration platform; 111 rotating hinge; 112 control hub; 113 control computer; 201 color and brightness acquisition instrument; 202 second interface; 203 second tripod; 204 second triangular rotatable platform; 205 left rotation viewing angle position; 206 second COB single module; 207 module detection status position; 208 second module display platform; 209 second conveying platform; 210 position of the detected COB single module; 211 color difference gear screening platform; 212 left rotation viewing angle; 213 right rotation viewing angle; 214 rotating hinge; 215 control hub; 216 right rotation viewing angle position; 217 control computer. DETAILED DESCRIPTION

[0048] In order to help those skilled in the art better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0049] For easier understanding, see Figure 1 , the present application provides an embodiment of a method for selecting a COB module based on color difference, including:

[0050] Step 1101: Obtain the tristimulus values ​​and the original RGBW matrix of the current COB single module through a preset camera and a preset color and brightness collector, respectively. The original RGBW matrix includes RGBW brightness values ​​and RGBW chromaticity values.

[0051] The preset camera in this embodiment is an industrial camera, but other suitable cameras can be selected according to actual needs, which is not limited here. The preset color and brightness acquisition instrument is used to collect color information of the COB single module. Specifically, it can obtain chromaticity and brightness information, and obtains information from the four channels of RGBW, where W refers to the white pixel channel. Moreover, for the convenience of description in this embodiment, a single COB single module is also referred to as a single module.

[0052] It is understandable that the preset camera can obtain the tristimulus value of the COB single module. The tristimulus value refers to the degree of stimulation of the three primary colors that cause the human retina to perceive a certain color. The preset color brightness collector can obtain the original RGBW matrix of the COB single module; the original RGBW matrix can be expressed as:

[0053]

[0054] Among them, the RGBW chromaticity values ​​corresponding to the four color channels are marked with x and y, and the RGBW brightness value of the COB single module is marked with L.

[0055] Furthermore, before step 1101, the following steps are also included:

[0056] Initialize all current devices, including the current COB single module, preset camera and preset color and brightness collector;

[0057] Optimize and adjust the shooting parameters of the preset camera, including micro focus, aperture, and shutter time.

[0058] Before acquiring information, each device needs to be initialized and the corresponding parameters adjusted to ensure that the acquired information is accurate and reliable. In addition to pre-setting the camera and pre-setting the color and brightness acquisition instrument, this embodiment also requires initialization of the COB single module.

[0059] The initialization of the COB single module is mainly the power module, which burns a unified driver firmware. The driver firmware includes some key parameters: RGB drive current, brightness efficiency, refresh rate and white balance color temperature value; and the COB single module needs to be initialized when collecting color brightness. The initialization of the preset camera is to determine the collection accuracy, for example, the brightness repeat collection accuracy is ±0.15%, and the chromaticity value repeat collection accuracy is ±0.0005; in addition, after powering on, the camera teaching aids can be adjusted to control the single module display screen to 4 / 5 of the camera collection center area to complete the initialization. The initialization of the preset color brightness collector is mainly to zero the instrument and align the normal of the instrument lens to the center position of the single module.

[0060] The parameter optimization and adjustment of this embodiment is mainly for the preset camera. If other devices need to adjust the parameters, they can also be adjusted as needed, which will not be described in detail here. In order to make the preset camera reach the best shooting state, it is necessary to adjust the micro focus, aperture and shutter time. The conditions of the best shooting state can be set to determine the adjustment target. For example, at least 80% of the pixel information of the COB single module must be clearly distinguished, including pixel size, brightness value and chromaticity value. If there are other shooting parameters, they also need to be adjusted to the best state, which is not limited here.

[0061] Step 1102: Perform normal correction calculation on the original RGBW matrix according to the tristimulus values ​​and the correction target value matrix to obtain a corrected COB single module.

[0062] To ensure the uniformity of subsequent gear position detection standards and the accuracy and reliability of gear position detection results, this embodiment requires a single-module calibration operation before performing COB single-module gear position detection. In essence, this operation unifies the display data of all modules in the front direction, that is, in the normal direction. The calibration process requires the brightness and chromaticity coordinates of the single module to be unified through point-by-point calibration.

[0063] The calibration target value matrix is ​​a preset reference matrix, which is the color brightness information (x w目标值 ,y w目标值 ), and then express it in matrix form as RGBW channels:

[0064]

[0065] in, Refers to the chromaticity value under white field W, The brightness attenuation ratio is set based on experience, usually 20%~30%.

[0066] The correction coefficients for each module are calculated based on the collected RGBW monochromatic tristimulus values. This calculation brings the original RGBW matrix closer to the correction target matrix, achieving normal correction. All calibrated COB modules achieve highly consistent normal parameters, chromaticity, and brightness, ensuring accurate and reliable subsequent gear position detection and analysis.

[0067] Furthermore, step 1102 further includes:

[0068] The calibrated COB single module is audited and verified according to the normal target value in the calibration target matrix to obtain the module deviation value;

[0069] If the module deviation value is within the preset deviation range, the calibration is qualified.

[0070] In order to ensure the qualification of the COB single module, this embodiment also verifies the corrected single module through the correction audit. If it passes the verification, it means that the correction is effective, that is, qualified. The verification basis is the normal target value in the correction target matrix, that is, (x w目标值 ,y w目标值 ) and L 目标值 ; The verification process is:

[0071] Verify on brightness:

[0072]

[0073] in, is the i-th calibrated COB single module.

[0074] Verify the coordinates on the chromaticity values:

[0075]

[0076]

[0077] in, The chromaticity value of the cth color of the i-th calibrated COB single module, where c is one of the four RGBW colors.

[0078] Step 1103: Obtain the rotational viewing angle information of the calibrated COB single module at different preset rotation angles through a preset color and brightness collector. The preset rotation angles include left rotation angle and right rotation angle.

[0079] To avoid the appearance of mosaics caused by color differences at different viewing angles, this embodiment uses a preset color and brightness acquisition device to collect and calibrate the chromaticity information of the COB single module at different preset rotational viewing angles to obtain rotational viewing chromaticity information. The preset rotational viewing angles in this embodiment mainly include left rotational viewing angles and right rotational viewing angles; therefore, the obtained rotational viewing chromaticity information mainly includes left rotational chromaticity information and right rotational chromaticity information.

[0080] It should be noted that the rotation of the visual angle chromaticity information in this embodiment is also to obtain the chromaticity value, that is, the chromaticity information (x lw ,y lw ) and right-rotated chromaticity information (x rw ,y rw ). In addition, the left rotation angle and the right rotation angle are formed by rotating a preset angle based on the normal line; the specific preset angle can be selected according to actual needs and is not limited here; for example, the deviation from the normal line 45 selected in this embodiment o As the default angle, if the left rotation angle is 45 o , then the right rotation angle is recorded as -45 o .

[0081] Step 1104 : Calculate the rotational view chromatic aberration level according to the rotational view chromatic aberration information and the normal target value in the correction target matrix. The rotational view chromatic aberration level includes a left view chromatic aberration level and a right view chromatic aberration level.

[0082] Based on the rotation view angle information and the normal target value in the correction target matrix (x w目标值 ,y w目标值 ) The process of calculating the angle difference of the rotational viewing angle is as follows: [10000×(x lw -x w目标值 ), 10000×(y lw -y w目标值 )] as the gear position of the left viewing angle of the COB single module, that is, the left viewing angle difference gear position, and [10000×(x rw -x w目标值 ), 10000×(y rw -y w目标值 )] as the gear position of the right viewing angle of the COB single module, that is, the right viewing color difference gear position. The rotation viewing color difference gear position can also be expressed as:

[0083]

[0084] Step 1105: Select the COB module based on the rotation viewing angle color difference gear and the preset gear span to obtain an optimized COB module large screen.

[0085] Furthermore, step 1105 includes:

[0086] The rotation visual angle difference gear is attached as a binning label on the back of the current COB single module to obtain a binning module set;

[0087] According to the preset gear span and the current splicing screen requirements, the target COB module is selected from the graded module set, and the optimized COB module large screen is spliced.

[0088] The calculated rotational visual angle color difference gear is affixed to the back of each COB single module currently under study and analysis in the form of a numerical value to form a set of graded modules. When a large screen needs to be spliced, the target COB module can be selected from the graded module set based on the rotational visual angle color difference gear. The current splicing screen requirement can be the target screen size and resolution, for example, an 8K large screen needs to be spliced; the preset gear span can be set according to the actual situation and is not limited here. For an 8K large screen, assuming its corresponding (D lx , D ly , D rx , D ry ) Each gear is set to have a preset gear span of 5; the gear module set D lx The smallest gear is -10, so when selecting a single module, only single modules within the range of [-10, -5] can be selected. ly The smallest gear is -4, so -4 is the first choice gear, then D ly The selection range is [-4,0]. rx The largest gear is 2, so 2 is the first choice gear, then D rx The selection range is [-2,2]. ry The largest gear is 10, so 10 is the first choice gear, then D ry The selection range is [5,10]. According to this selection rule, COB module selection can achieve a large screen with COB modules that meet the consistency requirements and avoid mosaic problems caused by the reddish or bluish tint of the module from the side view.

[0089] For ease of understanding, this application provides an application example corresponding to this embodiment, please refer to Figure 3 and Figure 4 ; Figure 3 Hardware structure diagram of COB single module calibration; Figure 4 This is the hardware structure diagram of the color difference gear detection of a COB single module.

[0090] for Figure 3, mainly including 101 industrial camera, 107 first module display platform, 108 first transmission platform and 113 control computer. Specifically, 101 industrial camera is fixed on 103 first tripod, 102 first interface of industrial camera control is connected to 113 control computer via serial data cable, 113 control computer controls 101 industrial camera through calibration host computer software, 103 first tripod is fixed on 104 first triangular rotatable platform, 104 first triangular rotatable platform is connected to 111 rotary hinge and 110 calibration platform via pull rod, 104 first triangular rotatable platform can rotate around 110 calibration platform, so that the calibration camera can find the best calibration position. The 110 correction platform includes the 107 first module display platform, the 108 first transmission platform and the 112 control hub. The 112 control hub is connected to the 113 control computer through a serial port data cable. The 105 first COB single module is transmitted to the 107 first module display platform by the 108 first transmission platform. The 107 first module display platform includes a power supply and a control board that can light up the light board and display normally. The control board is connected to the 112 control hub. When the COB single module is normally lit, the 107 first module display platform flips to the 106 module correction position, that is, perpendicular to the 110 correction platform. In this state, the 101 industrial camera is aligned with the COB single module in the normal direction, and the point correction is controlled by the 113 control computer. After the correction is completed, the module display platform is flipped back to the 110 correction platform and transmitted by the 108 first transmission platform to the 109 position of the COB single module to complete the correction. The correction of one COB single module is completed, and the other COB single modules are subjected to the normal correction operation according to the above process.

[0091] for Figure 4, mainly including 201 color brightness acquisition instrument, 208 second module display platform, 209 second transmission platform and 217 control computer. 201 color brightness acquisition instrument is fixed on 203 second tripod, and the second interface 202 of color brightness acquisition instrument data is connected to 217 control computer via serial data line. The control computer controls the host computer software to collect data, transmit and process data, and print the corresponding COB single module grading label. The second tripod 203 is fixed on the second triangular rotatable platform 204, and the second triangular rotatable platform 204 is connected to the rotary hinge 214 and the color difference gear screening platform 211 through a pull rod. The second triangular rotatable platform 204 can rotate around the color difference gear screening platform 211. For example, if it is rotated clockwise to the left rotation viewing angle position 205, a left rotation viewing angle 212 is generated, and the angle is a positive angle, the angle range is 0°~90°, and the recommended value is 45°; if it is rotated counterclockwise to the right rotation viewing angle position 216, a right rotation viewing angle 213 is generated, and the angle is a negative angle, the angle range is -90°~0°, and the recommended value is -45°. The color difference gear screening platform 211 includes the second module display platform 208, the second transmission platform 209 and the control hub 215. The control hub 215 is connected to the control computer 217 via a serial data cable. The second COB single module 206 is transmitted to the second module display platform 208 by the second transmission platform 209. The second module display platform 208 includes a power supply and a control board card that can light up the light board and display normally. The control board card is connected to the control hub 215. When the COB single module is normally lit and displays a white field image, the second module 208 The display platform is flipped to the module detection state position 207, which is perpendicular to the color difference gear screening platform 211. In this state, the color brightness acquisition instrument 201 completes the acquisition of the color brightness information of the forward viewing angle, the left viewing angle and the right viewing angle. After the three sets of data are collected, the module display platform is reversely flipped to the color difference gear screening platform 211, and is transmitted by the second transmission platform 209 to the COB single module position 210 to complete the detection, completing the color difference screening and grading of one COB single module. The other COB single modules are detected and graded according to the above process.

[0092] In addition, in this application example, the white field target value in the calibration process is set to 9300K, that is, the corresponding chromaticity value (x w目标值 ,y w目标值) = (0.283, 0.297); the white field target value can be set within the range of 3200K to 9300K depending on the application scenario; for example, if it is 3200K, then (xw target value, yw target value) = (0.410, 0.390); if it is 6500K, then (xw target value, yw target value) = (0.313, 0.323). In addition, after the target values ​​of the calibration target value matrix are obtained and the standard single-module calibration is entered, it is necessary to disable the calibration of the first COB single module 105, set its grayscale value to 255, and measure the original RGBW matrix of the COB single module with a color luminance collector. Moreover, during the calibration phase, the industrial camera needs to be used multiple times, but the color luminance collector only needs to be used once for each COB single module.

[0093] During the color difference level detection and analysis phase, the second COB module 206 is transferred via the transmission platform 209 to the second module display platform 208. The control computer 217 illuminates the COB module through the control hub 215. Initialization then proceeds, with the single-module screen displaying pure white (this can be a red, green, or blue screen; based on actual production experience, single-module color difference issues can be identified based on white, so pure white is displayed here to improve production efficiency). Brightness is set to 100%, calibration is set to chromaticity, and color temperature is set to 9300K (other values ​​may be used depending on the target value set during single-module calibration). Secondly, the color luminance acquisition instrument 201 is initialized. This includes zeroing the instrument and aligning the normal of the instrument lens to the center of the single module. In addition, the selection of the preset rotation perspective actually selects the left rotation perspective position 205 on the left side relative to the normal position of the single module, which is 45° (the second triangular rotatable platform 204 is rotated 45° clockwise from the normal), and the right rotation perspective position 216 on the right side, which is -45° (the second triangular rotatable platform 204 is rotated 45° clockwise from the normal).

[0094] The color difference-based COB module selection method provided in the embodiment of the present application performs normal correction processing on each current COB single module through a camera and a color brightness collector, which can ensure the uniformity of the subsequent data analysis benchmark; then, data analysis is performed on the chromaticity information at different viewing angles, and the color difference gear of each COB single module is calculated. Selecting the module according to the preset gear span can ensure that the selected modules are all within a certain color difference range, thereby avoiding the mosaic problem caused by the serious color difference of different viewing angles and improving the combination quality of the COB module large screen. Therefore, the embodiment of the present application can solve the technical problem that the existing COB module large screen has serious color difference of different viewing angles, which is prone to mosaics, not only affecting the user experience, but also causing material loss.

[0095] For easier understanding, see Figure 2The present application provides an embodiment of a COB module selection device based on color difference, comprising:

[0096] The information acquisition unit 2201 is used to obtain the tristimulus values ​​and the original RGBW matrix of the current COB single module through a preset camera and a preset color and brightness collector, respectively. The original RGBW matrix includes RGBW brightness values ​​and RGBW chromaticity values;

[0097] The normal correction unit 2202 is used to perform normal correction calculation on the original RGBW matrix according to the tristimulus values ​​and the correction target value matrix to obtain a corrected COB single module;

[0098] The deflection angle detection unit 2203 is used to obtain the rotation angle information of the COB single module under different preset rotation angles through a preset color and brightness collector. The preset rotation angles include left rotation angle and right rotation angle;

[0099] A gear calculation unit 2204 is configured to calculate a rotational view chromatic aberration gear according to the rotational view chromatic aberration information and a normal target value in the correction target matrix, wherein the rotational view chromatic aberration gear includes a left view chromatic aberration gear and a right view chromatic aberration gear;

[0100] The module selection unit 2205 is used to select the COB module based on the rotation viewing angle color difference gear and the preset gear span to obtain the optimized COB module large screen.

[0101] Furthermore, it also includes:

[0102] Initialization unit 2206, used to initialize all current devices, including the current COB single module, preset camera and preset color and brightness acquisition instrument;

[0103] The parameter adjustment unit 2207 is used to optimize and adjust the shooting parameters of the preset camera. The shooting parameters include micro focus, aperture and shutter time.

[0104] Furthermore, it also includes:

[0105] The calibration audit unit 2208 is used to audit and verify the calibration COB single module according to the normal target value in the calibration target matrix to obtain the module deviation value;

[0106] If the module deviation value is within the preset deviation range, the calibration is qualified.

[0107] Furthermore, the module selection unit 2205 is specifically configured to:

[0108] The rotation visual angle difference gear is attached as a binning label on the back of the current COB single module to obtain a binning module set;

[0109] According to the preset gear span and the current splicing screen requirements, the target COB module is selected from the graded module set, and the optimized COB module large screen is spliced.

[0110] The present application also provides a COB module selection device based on color difference, the device including a processor and a memory;

[0111] The memory is used to store program codes and transmit the program codes to the processor;

[0112] The processor is configured to execute the color difference-based COB module selection method in the above method embodiment according to instructions in the program code.

[0113] The present application also provides a computer-readable storage medium, which is used to store program code, and the program code is used to execute the color difference-based COB module selection method in the above method embodiment.

[0114] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0115] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0116] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0117] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for executing all or part of the steps of the method described in each embodiment of the present application through a computer device (which can be a personal computer, server, or network device, etc.). The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (full name: Read-Only Memory, English abbreviation: ROM), random access memory (full name: Random Access Memory, English abbreviation: RAM), disk or optical disk, and other media that can store program code.

[0118] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for selecting COB modules based on color difference, characterized in that: include: Obtain the tristimulus values ​​and the original RGBW matrix of the current COB single module through a preset camera and a preset color brightness collector, respectively. The original RGBW matrix includes RGBW brightness values ​​and RGBW chromaticity values; Perform normal correction calculation on the original RGBW matrix according to the tristimulus values ​​and the correction target value matrix to obtain a corrected COB single module; The preset color brightness collector is used to respectively obtain the rotational viewing angle information of the calibrated COB single module at different preset rotation angles, wherein the preset rotation angles include a left rotation angle and a right rotation angle; Calculating a rotational view angular difference gear according to the rotational view angular degree information and the normal target value in the correction target matrix, wherein the rotational view angular difference gear includes a left view angular difference gear and a right view angular difference gear; The COB module is selected based on the rotation viewing angle difference gear and the preset gear span to obtain an optimized COB module large screen.

2. The method for selecting a COB module based on color difference according to claim 1, wherein: The method further includes obtaining the tristimulus values ​​and the original RGBW matrix of the current COB single module through a preset camera and a preset color brightness collector respectively: Initialize all current devices, including the current COB single module, the preset camera, and the preset color and brightness collector; The shooting parameters of the preset camera are optimized and adjusted, wherein the shooting parameters include micro focus, aperture and shutter time.

3. The method for selecting COB modules based on color difference according to claim 1, wherein: The method further includes performing normal correction calculation on the original RGBW matrix according to the tristimulus values ​​and the correction target value matrix to obtain a corrected COB single module, and then further including: Auditing and verifying the corrected COB single module according to the normal target value in the corrected target matrix to obtain a module deviation value; If the module deviation value is within the preset deviation range, the calibration is qualified.

4. The method for selecting a COB module based on color difference according to claim 1, wherein: The COB module is selected based on the rotation viewing angle difference gear and the preset gear span to obtain an optimized COB module large screen, including: The rotational visual angle difference gear is attached as a binning label on the back of the current COB single module to obtain a binning module set; According to the preset gear span and the current splicing screen requirements, the target COB module is selected from the graded module set, and the optimized COB module large screen is spliced.

5. A COB module selection device based on color difference, characterized in that: include: An information acquisition unit is used to obtain the tristimulus values ​​and the original RGBW matrix of the current COB single module through a preset camera and a preset color and brightness collector, respectively. The original RGBW matrix includes RGBW brightness values ​​and RGBW chromaticity values; A normal correction unit, configured to perform normal correction calculation on the original RGBW matrix according to the tristimulus values ​​and the correction target value matrix to obtain a corrected COB single module; The deflection angle detection unit is used to obtain the rotational viewing angle information of the calibrated COB single module under different preset rotation angles through the preset color brightness collector, and the preset rotation angles include left rotation angle and right rotation angle; a gear calculation unit, configured to calculate a rotational view angular difference gear according to the rotational view angular degree information and a normal target value in the correction target matrix, wherein the rotational view angular difference gear includes a left view angular difference gear and a right view angular difference gear; The module selection unit is used to select the COB module based on the rotation viewing angle color difference gear and the preset gear span to obtain an optimized COB module large screen.

6. The COB module selection device based on color difference according to claim 5, characterized in that: Also includes: An initialization unit, configured to initialize all current devices, including the current COB single module, the preset camera, and the preset color and brightness collector; The parameter adjustment unit is used to optimize the state of the shooting parameters of the preset camera, where the shooting parameters include micro focus, aperture and shutter time.

7. The COB module selection device based on color difference according to claim 5, characterized in that: Also includes: A calibration audit unit, configured to audit and verify the calibration COB single module according to the normal target value in the calibration target matrix to obtain a module deviation value; If the module deviation value is within the preset deviation range, the calibration is qualified.

8. The COB module selection device based on color difference according to claim 5, characterized in that: The module selection unit is specifically used to: The rotational visual angle difference gear is attached as a binning label on the back of the current COB single module to obtain a binning module set; According to the preset gear span and the current splicing screen requirements, the target COB module is selected from the graded module set, and the optimized COB module large screen is spliced.

9. A COB module selection device based on color difference, characterized in that: The device includes a processor and a memory; The memory is used to store program code and transmit the program code to the processor; The processor is used to execute the color difference-based COB module selection method according to any one of claims 1 to 4 according to the instructions in the program code.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium is used to store program code, and the program code is used to execute the color difference-based COB module selection method according to any one of claims 1 to 4.

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