Method and device for automatically testing display abnormity of display module
By configuring gain parameters and image channel division, the static and dynamic anomalies of the display module are automatically tested, solving the problem of complex and inaccurate testing in the existing technology and achieving more efficient and accurate test results.
Patent Information
- Application Number
- CN202510723159.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-30
- Publication Date
- 2025-09-26
AI Technical Summary
In the prior art, the testing operation of the display module is complicated and the test results are inaccurate, which can easily damage the equipment and relies on the operator's experience.
By configuring fixed gain parameters, a RAW format image of the display module in a dark environment is obtained, and the image is divided into different channel images according to color. The gain parameters are adjusted through the second square area in the center area of each channel image to obtain the average color brightness to determine static and dynamic anomalies.
It improves the accuracy and efficiency of display module testing, reduces operational complexity and equipment damage risks, and reduces dependence on operator experience.
Smart Images
Figure CN120707477A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of display abnormality testing of a display module, and in particular to a method and device for automatically testing display abnormality of a display module. Background Art
[0002] Currently, during the production process, display module anomaly testing is primarily performed through the following methods: Visual inspection: Directly observe the display module in a dark environment to check for noticeable flickering or brightness changes, observing from different angles and distances, paying attention to the entire screen as well as the edge areas. Professional instrument inspection: Connect an oscilloscope probe to the display module's power pins or related signal lines, set appropriate voltage and time ranges, and observe the waveform. Display anomalies will appear as periodic voltage fluctuations on the oscilloscope. Display anomaly meter testing: Illuminate the display module with an anomaly meter and adjust the anomaly meter's frequency to match the display module's display anomaly frequency. When the two frequencies match, the display anomaly will appear static or significantly weakened, allowing the characteristics of the display anomaly to be observed and analyzed.
[0003] However, when the sampling oscilloscope performs display abnormality testing, operating the load and connecting the signal lines can easily damage the equipment and cause inaccurate test results. When the sampling display abnormality instrument performs testing, it is very dependent on the operator's testing experience, and different testers may obtain different test results. Summary of the Invention
[0004] In the prior art, when testing a display module, there are problems such as complex operations and inaccurate test results.
[0005] To address the above problems, a method and device for automatic testing of display abnormalities of a display module are proposed. By configuring fixed gain parameters, a RAW format image of the display module to be tested in a dark environment is obtained, and the RAW format image is divided into different channel images according to color. A static test is performed on the display module to be tested, and a second square area of a specified size in the center area of each channel image is used as a unit to continuously adjust the gain parameter. The average second color brightness value corresponding to each step is obtained, and a dynamic test is performed. This improves the accuracy and efficiency of display module testing and solves the problems of complex operation and inaccurate test results in the existing technology when testing display modules.
[0006] In a first aspect, a method for automatically testing display abnormalities of a display module includes: Step 100, a static test, configuring fixed gain parameters, obtaining a RAW format image of the display module to be tested in a dark environment, dividing the RAW format image into different channel images according to color, obtaining the color brightness average of each first square area of a specified size of the current channel image, obtaining a first maximum value, a first minimum value, and a first difference of the first color brightness average value of the current channel image, and determining whether the display module has a static abnormality based on the first maximum value, the first minimum value, and the first difference of the color brightness average value; Step 200, dynamic testing, obtains a second square area of a specified size in the central area of each channel image, continuously adjusts the gain parameter based on the second square area, obtains the second color brightness average corresponding to each step, and determines whether the display module has dynamic abnormalities based on the second color brightness average.
[0007] In conjunction with the method for automatically testing display abnormalities of a display module according to the first aspect of the present invention, in a first possible implementation, step 100 includes: Step 110: Acquire the RAW format image; Step 120: Divide the RAW format image into an R channel image, a G channel image, a GR channel image, and a GB channel image.
[0008] In combination with the first possible implementation of the first aspect of the present invention, in a second possible implementation, step 100 further includes: Step 130: Divide each channel image into a plurality of n×n first square regions in units of pixels, wherein the rows and columns of the first square regions respectively include the same number of pixels; Step 140: Calculate the remaining irregular square areas separately.
[0009] In combination with the second possible implementation manner of the first aspect of the present invention, in a third possible implementation manner, step 100 further includes: Step 150: Obtain the average brightness values of all first colors in all first square areas of the current channel image; Step 160 : Filter out the first maximum value, the first minimum value, and the first difference between the first maximum value and the first minimum value from all the first color brightness average values.
[0010] In combination with the third possible implementation manner of the first aspect of the present invention, in a fourth possible implementation manner, step 100 further includes: Step 170: Compare the first maximum value, the first minimum value, and the first difference value with corresponding specified ranges respectively; Step 180: If the first maximum value, the first minimum value, or the first difference value exceeds a specified range, it is determined that the display module has a static abnormality.
[0011] In conjunction with the fourth possible implementation manner of the first aspect of the present invention, in a fifth possible implementation manner, step 180 includes: Step 181: If the first maximum value and the first minimum value exceed the specified range; Step 182: Determine whether the display module has color cast abnormality.
[0012] In conjunction with the fourth possible implementation manner of the first aspect of the present invention, in a sixth possible implementation manner, step 180 includes: Step 183: If the first difference exceeds a specified range; Step 184: determine that the display module is abnormally disturbed by noise.
[0013] In conjunction with the method for automatically testing display abnormalities of a display module according to the first aspect of the present invention, in a seventh possible implementation, step 200 includes: Step 210: Compare the second color brightness average value with a specified range; Step 220: If the second color brightness average value exceeds a specified range, it is determined that the display module to be tested has a flickering abnormality.
[0014] In a second aspect, a device for automatically testing display abnormalities of a display module is provided, which adopts the method for automatically testing display abnormalities of a display module described in the first aspect, comprising: a static test module configured to configure fixed gain parameters, obtain a RAW format image of the display module to be tested in a dark environment, divide the RAW format image into different channel images according to color, obtain the color brightness average value of each first square area of a specified size of the current channel image, obtain a first maximum value, a first minimum value, and a first difference of the first color brightness average value of the current channel image, and determine whether the display module has a static abnormality based on the first maximum value, the first minimum value, and the first difference of the color brightness average value; The dynamic testing module is used to obtain a second square area of a specified size in the central area of each channel image, continuously adjust the gain parameter based on the second square area, obtain the second color brightness average value corresponding to each step, and determine whether the display module has dynamic abnormalities based on the second color brightness average value.
[0015] In conjunction with the display abnormality automatic testing device for a display module according to the second aspect of the present invention, in a first possible implementation manner, the static testing module includes a static judgment unit, and the dynamic testing module includes a dynamic judgment unit; The static judgment unit is used to compare the first maximum value, the first minimum value and the first difference with the corresponding specified ranges respectively, and if the first maximum value, the first minimum value or the first difference exceeds the specified range, it is determined that the display module is statically abnormal.
[0016] The dynamic judgment unit is used to compare the second color brightness average value with a specified range, and if the second color brightness average value exceeds the specified range, it is determined that the display module to be tested has a stroboscopic abnormality.
[0017] The method and device for automatically testing display abnormalities of a display module described in the present invention are implemented. By configuring fixed gain parameters, a RAW format image of the display module to be tested in a dark environment is obtained. The RAW format image is divided into different channel images according to color, and a static test is performed on the display module to be tested. The gain parameter is continuously adjusted in units of a second square area of a specified size in the center area of each channel image, and the average second color brightness value corresponding to each step is obtained. Dynamic testing is performed, thereby improving the accuracy and efficiency of display module testing and solving the problems in the prior art of complex operation and inaccurate test results when testing display modules. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0019] Figure 1 This is a flowchart of a specific embodiment of a method for automatically testing display abnormalities of a display module in the present application; Figure 2 yes Figure 1 A schematic flow chart of a specific embodiment of step 100; Figure 3 yes Figure 2 A schematic flow chart of a specific embodiment after step 120; Figure 4 yes Figure 3 A schematic flow chart of a specific embodiment after step 140; Figure 5 yes Figure 4 A schematic flow chart of a specific embodiment of step 160; Figure 6 yes Figure 5 A flow chart of a specific embodiment of step 180; Figure 7 yes Figure 5 Another specific embodiment of step 180 is shown in the flowchart; Figure 8 yes Figure 1 A schematic flow chart of a specific embodiment of step 200; Figure 9 This is a schematic diagram of the module structure of a display abnormality automatic testing device for a display module in the present application. DETAILED DESCRIPTION
[0020] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by ordinary technicians in this field without creative work are all within the scope of protection of the present invention.
[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0022] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.
[0023] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.
[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.
[0025] In the prior art, when testing a display module, there are problems such as complex operations and inaccurate test results.
[0026] In order to solve the above problems, a method and device for automatically testing display abnormalities of a display module are proposed.
[0027] In the first aspect, a method for automatically testing display abnormalities of a display module is provided. Figure 1 , Figure 1 This is a flowchart of a specific embodiment of a method for automatically testing display abnormalities of a display module in this application; it includes: Step 100, static test, configure fixed gain parameters, obtain a RAW format image of the display module to be tested in a dark environment, divide the RAW format image into different channel images according to color, obtain the color brightness average value of each first block area of a specified size of the current channel image, obtain the first maximum value, first minimum value and first difference of the first color brightness average value of the current channel image, and determine whether the display module has a static abnormality based on the first maximum value, first minimum value and first difference of the color brightness average value.
[0028] In a preferred embodiment, Figure 2 , Figure 2 yes Figure 1 A flow chart of a specific embodiment of step 100; step 100 includes: step 110, obtaining a RAW format image; step 120, dividing the RAW format image into an R channel image, a G channel image, a GR channel image and a GB channel image.
[0029] In this embodiment, a fixed gain coefficient is configured in a dark environment, and channel division is performed under the fixed gain coefficient to obtain images of different color channels.
[0030] In a preferred embodiment, Figure 3 , Figure 3 yes Figure 2 A flowchart of a specific embodiment after step 120 in FIG. 1 is provided; step 100 further includes: step 130, dividing each channel image into a plurality of n×n first square areas in units of pixels, wherein the rows and columns of the first square areas respectively include the same number of pixels; step 140, calculating the remaining irregular square areas separately.
[0031] In this embodiment, the first block area has equal numbers of pixels in its rows and columns, i.e., it is a square block area. For block areas that cannot be divided regularly, such as those with unequal numbers of pixels in their rows and columns, separate calculations are performed.
[0032] For example, each area is partitioned into 20*20 pixels. If it is not divisible evenly, the final area is calculated separately. For example, if the final area is only 16*18, it is calculated as a separate area according to the 16*18 roi.
[0033] In a preferred embodiment, Figure 4 , Figure 4 yes Figure 3 A flowchart of a specific embodiment after step 140; step 100 also includes: step 150, obtaining all first color brightness averages of all first block areas of the current channel image; step 160, screening out the first maximum value, the first minimum value and the first difference between the two from all first color brightness averages.
[0034] In this embodiment, the channel image of each color is divided into multiple first square areas, and the average value of the color brightness value corresponding to each first square area is calculated, so there are multiple first color brightness average values. The first maximum value and the first minimum value are found from these average values, and the first difference between the two is calculated.
[0035] Diff = max - min; (1) Among them, Diff is the first difference, max is the first maximum value, and min is the first minimum value.
[0036] In a preferred embodiment, Figure 5 , Figure 5 yes Figure 4 A flowchart of a specific embodiment of step 160; step 100 also includes: step 170, comparing the first maximum value, the first minimum value and the first difference with the corresponding specified ranges; step 180, if the first maximum value, the first minimum value or the first difference exceeds the specified range, determining that the display module is statically abnormal.
[0037] In a preferred embodiment, Figure 6 , Figure 6 yes Figure 5 A flow chart of a specific embodiment of step 180 is shown; step 180 includes: step 181, if the first maximum value and the first minimum value exceed the specified range; step 182, determining that the display module is abnormal in color cast.
[0038] In a preferred embodiment, Figure 7 , Figure 7 yes Figure 5 Another specific embodiment of step 180 is a flowchart; step 180 includes: step 183, if the first difference exceeds the specified range; step 184, it is determined that the display module is abnormally disturbed by noise.
[0039] In the embodiment, if diff exceeds the limit, it may cause noise and other effects. If max and min exceed the limit, it is generally due to color cast of the module.
[0040] Step 200: Dynamic test: obtain a second square area of a specified size in the center area of each channel image, continuously adjust the gain parameter based on the second square area, obtain the second color brightness average value corresponding to each step, and determine whether the display module has dynamic abnormalities based on the second color brightness average value.
[0041] In a preferred embodiment, Figure 8 , Figure 8 yes Figure 1 A flow chart of a specific embodiment of step 200 is provided; step 200 includes: step 210, comparing the average brightness value of the second color with a prescribed range; step 220, if the average brightness value of the second color exceeds the prescribed range, determining that the display module to be tested has a stroboscopic abnormality.
[0042] In an embodiment of the present application, by configuring a fixed gain parameter, a RAW format image of the display module to be tested in a dark environment is obtained, the RAW format image is divided into different channel images according to color, a static test is performed on the display module to be tested, and a second square area of a specified size in the central area of each channel image is used as a unit to continuously adjust the gain parameter, obtain the second color brightness average value corresponding to each step, and perform a dynamic test, thereby improving the accuracy and efficiency of the display module test and solving the problems in the prior art of complex operation and inaccurate test results when testing the display module.
[0043] In a second aspect, a display abnormality automatic testing device for a display module is provided, which is based on the display abnormality automatic testing method for a display module according to the first aspect. Figure 9 , Figure 9 This is a schematic diagram of the module structure of a display module display abnormality automatic test device in this application. It includes: Static test module 401 is configured to configure fixed gain parameters, obtain a RAW format image of the display module to be tested in a dark environment, divide the RAW format image into different channel images according to color, obtain the color brightness average value of each first square area of a specified size of the current channel image, obtain the first maximum value, first minimum value, and first difference of the first color brightness average value of the current channel image, and determine whether the display module has a static abnormality based on the first maximum value, first minimum value, and first difference of the color brightness average value; The dynamic test module 402 is used to obtain a second square area of a specified size in the central area of each channel image, continuously adjust the gain parameter in units of the second square area, obtain the second color brightness average value corresponding to each step, and determine whether the display module has dynamic abnormalities based on the second color brightness average value.
[0044] Furthermore, the static test module 401 includes a static judgment unit, and the dynamic test module 402 includes a dynamic judgment unit. The static judgment unit is configured to compare the first maximum value, the first minimum value, and the first difference with corresponding specified ranges, and to determine that the display module has a static abnormality if the first maximum value, the first minimum value, or the first difference exceeds the specified range. The dynamic judgment unit is configured to compare the average value of the second color brightness with the specified range, and to determine that the display module under test has a flicker abnormality if the average value of the second color brightness exceeds the specified range.
[0045] The present invention implements a method and device for automatically testing display abnormalities of a display module. By configuring fixed gain parameters, a RAW format image of the display module to be tested in a dark environment is obtained, the RAW format image is divided into different channel images according to color, and a static test is performed on the display module to be tested. The gain parameter is continuously adjusted in units of a second square area of a specified size in the center area of each channel image, and the average second color brightness value corresponding to each step is obtained. Dynamic testing is performed, thereby improving the accuracy and efficiency of display module testing and solving the problems in the prior art of complex operation and inaccurate test results when testing display modules.
[0046] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A method for automatically testing display abnormalities of a display module, characterized in that: include: Step 100: Static test: configuring fixed gain parameters, obtaining a RAW format image of the display module to be tested in a dark environment, dividing the RAW format image into different channel images according to color, obtaining a color brightness average value of each first square area of a specified size of the current channel image, obtaining a first maximum value, a first minimum value, and a first difference of the first color brightness average value of the current channel image, and determining whether the display module has a static abnormality based on the first maximum value, the first minimum value, and the first difference; Step 200: Dynamic test: Obtain a second square area of a specified size in the central area of each channel image, continuously adjust the gain parameter based on the second square area, obtain the second color brightness average value corresponding to each step, and determine whether the display module has a dynamic abnormality based on the second color brightness average value.
2. The display abnormality automatic testing method of the display module according to claim 1, characterized in that: The step 100 includes: Step 110: Acquire the RAW format image; Step 120: Divide the RAW format image into an R channel image, a G channel image, a GR channel image, and a GB channel image.
3. The method for automatically testing display abnormalities of a display module according to claim 2, wherein: The step 100 further includes: Step 130: Divide each channel image into a plurality of n×n first square regions in units of pixels, wherein the rows and columns of the first square regions respectively include the same number of pixels; Step 140: Calculate the remaining irregular square areas separately.
4. The method for automatically testing display abnormalities of a display module according to claim 3, wherein: The step 100 further includes: Step 150: Obtain the average brightness values of all first colors in all first square areas of the current channel image; Step 160 : Filter out the first maximum value, the first minimum value, and the first difference between the first maximum value and the first minimum value from all the first color brightness average values.
5. The method for automatically testing display abnormalities of a display module according to claim 4, characterized in that: The step 100 further includes: Step 170: Compare the first maximum value, the first minimum value, and the first difference value with corresponding specified ranges respectively; Step 180: If the first maximum value, the first minimum value, or the first difference value exceeds a specified range, it is determined that the display module has a static abnormality.
6. The method for automatically testing display abnormalities of a display module according to claim 5, characterized in that: The step 180 includes: Step 181: If the first maximum value and the first minimum value exceed the specified range; Step 182: Determine whether the display module has color cast abnormality.
7. The method for automatically testing display abnormalities of a display module according to claim 5, characterized in that: The step 180 includes: Step 183: If the first difference exceeds a specified range; Step 184: determine that the display module is abnormal due to noise interference.
8. The method for automatically testing display abnormalities of a display module according to claim 1, wherein: The step 200 includes: Step 210: Compare the second color brightness average value with a specified range; Step 220: If the second color brightness average value exceeds a specified range, it is determined that the display module to be tested has a flickering abnormality.
9. An automatic display abnormality testing device for a display module, adopting the automatic display abnormality testing method for a display module according to any one of claims 1 to 8, characterized in that: include: a static test module configured to configure fixed gain parameters, obtain a RAW format image of the display module to be tested in a dark environment, divide the RAW format image into different channel images according to color, obtain the color brightness average value of each first square area of a specified size of the current channel image, obtain a first maximum value, a first minimum value, and a first difference of the first color brightness average value of the current channel image, and determine whether the display module has a static abnormality based on the first maximum value, the first minimum value, and the first difference; The dynamic testing module is used to obtain a second square area of a specified size in the central area of each channel image, continuously adjust the gain parameter based on the second square area, obtain the second color brightness average value corresponding to each step, and determine whether the display module has dynamic abnormalities based on the second color brightness average value.
10. The automatic display abnormality testing device of the display module according to claim 9, characterized in that: The static test module includes a static judgment unit, and the dynamic test module includes a dynamic judgment unit; a static determination unit, configured to compare the first maximum value, the first minimum value, and the first difference with corresponding prescribed ranges, and determine that a static abnormality of the display module occurs if the first maximum value, the first minimum value, or the first difference exceeds the prescribed range; The dynamic judgment unit is used to compare the second color brightness average value with a specified range, and if the second color brightness average value exceeds the specified range, it is determined that the display module to be tested has a stroboscopic abnormality.