A liquid crystal module performance testing system based on data analysis

Abstract

The invention relates to the field of liquid crystal module testing, and is used to solve the problem that a single test function leads to insufficient fault detection capability and the test needs to be performed throughout the whole process, resulting in low test efficiency. The invention is specifically a liquid crystal module performance test system based on data analysis. In the invention, the detection mode of the liquid crystal module is divided into a plurality of modes, namely, color bad pixels, color noise pixels, picture refresh speed and picture brightness, so as to perform a comprehensive detection operation on the liquid crystal module, ensure the perfection of the detection process, and improve the fault detection capability. When the liquid crystal module is detected, the detected bad pixels, noise pixels and brightness abnormal points are detected in real time, and when the bad pixels, noise pixels and brightness abnormal points reach the judgment threshold of defective products, a defective judgment result is generated in time, and the detection is stopped at the same time, so as to facilitate the detection station to replace the next group of liquid crystal modules for detection, and avoid the waste of detection time caused by the continuous detection of the liquid crystal modules that have been determined as defective products.

Description

Technical Field

[0001] The present invention relates to the field of liquid crystal module testing, and in particular to a liquid crystal module performance testing system based on data analysis. Background Art

[0002] Some current LCD products are widely used for their advantages such as thinness, low power consumption, low radiation, stable screen images and no flickering. The LCD module is the main component of the LCD product, which includes components such as the LCD panel and backlight. As the mechanization of the product assembly line of flat panel manufacturers becomes higher and higher, the requirements for the performance testing of the LCD module are also getting higher and higher. First of all, the external power supply requirements of large-screen LCD modules need to be adjustable under a specific step accuracy. LCD modules of different sizes can automatically identify various parameters such as image color, brightness, grayscale, resolution, etc. when testing, and the module information can be quickly switched;

[0003] At present, the liquid crystal module performance test system in the prior art still has shortcomings. During the test process, the existing liquid crystal module test system basically performs bad pixel detection on the liquid crystal module. The detection method is single and the fault detection capability is insufficient. At the same time, the detection results of the existing detection system are judged after the detection is completed, which results in the products that have already shown unqualified characteristics in the early stage of the test still completing the whole test, making the later stage of the test meaningless and reducing the test efficiency.

[0004] In view of the above technical problems, this application proposes a solution. Summary of the invention

[0005] In the present invention, when the liquid crystal module is detected, the detection method of the liquid crystal module is divided into multiple methods such as color bad pixels, color noise points, picture refresh speed and picture brightness, so as to perform a comprehensive detection operation on the liquid crystal module, ensure the perfection of the detection process, and improve the fault detection capability. When the liquid crystal module is detected, the detected bad pixels, noise points and brightness abnormal points are detected in real time, and when the bad pixels, noise points and brightness abnormal points reach the judgment threshold of defective products, the defective judgment result is generated in time, and the detection is stopped at the same time, so that the detection station is convenient to replace the next group of liquid crystal modules for detection, avoiding the waste of detection time caused by continuing to detect the liquid crystal modules that have been determined as defective products, improving the detection efficiency, solving the problem that the fault detection capability is insufficient due to the single test function and the test needs to be carried out throughout the process, resulting in low test efficiency, and proposing a liquid crystal module performance test system based on data analysis.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A liquid crystal module performance test system based on data analysis, comprising a test control unit, a picture acquisition unit, a feedback alarm unit, a control conversion unit and a comparison analysis unit, wherein the test control unit is used to generate a control signal to control the test of the liquid crystal module, and send the control signal to the picture acquisition unit and the control conversion unit at the same time;

[0008] After receiving the control signal, the image acquisition unit can acquire the image of the liquid crystal module through the image acquisition device, analyze the color according to the acquisition result, generate damaged pixel points and abnormal pixel points, analyze the change time, generate the change time, analyze the image brightness, generate normal brightness points and abnormal brightness points;

[0009] The control conversion unit can extract the control signal, obtain the color setting sequence, change time and screen brightness controlled by the control signal, and send them to the comparison and analysis unit;

[0010] The comparison and analysis unit is used to compare the main color set of the picture acquisition unit with the color setting sequence, compare the actual change time of the picture acquisition unit with the change time, compare the normal brightness point of the picture acquisition unit with the picture brightness, and generate a color judgment signal, a brightness judgment signal and a refresh judgment signal according to the comparison results;

[0011] The feedback alarm unit can analyze abnormal pixels, damaged pixels and abnormal brightness points during the detection process and generate a termination signal according to the analysis results.

[0012] As a preferred embodiment of the present invention, the control signal of the test control unit on the liquid crystal module includes: a color display control signal, a rapid change control signal and a screen brightness control signal. After the test control unit generates the color display control signal, it controls the liquid crystal display module to display the color set in the color display control. After generating the rapid change control signal, the test control unit controls the liquid crystal display module to quickly switch the screen. After generating the screen brightness control signal, the test control unit controls the liquid crystal display module to adjust the brightness of the screen.

[0013] As a preferred embodiment of the present invention, the method for the picture acquisition unit to analyze color is:

[0014] The picture acquisition unit identifies the acquired image through a color quantization algorithm, obtains the RGB channel value of each pixel on the image, compares the RGB channel values ​​of all pixels and creates multiple empty sets, classifies the pixels with the same RGB channel value in the comparison result into the same set, and among all the sets, the set with the most pixels is recorded as the main color set, and the other sets are recorded as noise sets. The picture acquisition unit extracts the noise set, obtains the positions corresponding to the pixels in the noise set, and marks them as noise position sets;

[0015] Each time the test control unit generates a color display control signal, the picture acquisition unit acquires the picture displayed by the liquid crystal module, and analyzes the picture after acquisition to obtain a main color set and a noise point position set.

[0016] As a preferred embodiment of the present invention, the picture acquisition unit selects a pixel point and counts the set type where the selected pixel point is located. If a pixel point appears entirely in the noise point position set, the selected pixel point is recorded as a damaged noise point. If a pixel point appears in both the noise point position set and the main color set, the selected pixel point is recorded as an abnormal pixel point.

[0017] The image acquisition unit calculates the position ratio of abnormal pixel points in the noise position set and the main color set. If the ratio in the noise position set is greater than or equal to the ratio in the main color set, a high-frequency abnormal pixel point is generated; if the ratio in the noise position set is less than the ratio in the main color set, a low-frequency abnormal pixel point is generated.

[0018] As a preferred implementation of the present invention, the picture acquisition unit captures images through an image acquisition device, and records the time when the captured image changes, and records the time point of each change as the actual change time.

[0019] As a preferred embodiment of the present invention, the image acquisition unit performs grayscale processing on the image acquired by the image acquisition device, obtains the grayscale value of each pixel, compares the grayscale values ​​of all pixels, and records the grayscale value with the largest number of identical values ​​among the grayscale values ​​of all pixels as a reference grayscale. If the grayscale value of the pixel is the same as the reference grayscale, it is recorded as a normal brightness point; if the grayscale value of the pixel is different from the reference grayscale, it is recorded as an abnormal brightness point.

[0020] As a preferred embodiment of the present invention, after the conversion control unit obtains the control signal, the color setting, change time and picture brightness in the control signal are obtained, and the obtained color setting sequence, change time and picture brightness are sent to the comparison and analysis unit;

[0021] The comparison and analysis unit obtains multiple main color sets, actual change time and normal brightness points through the picture acquisition unit, sorts the multiple main color sets according to the order of appearance, generates a color sequence, and compares the color sequence with the color setting sequence in sequence. If the comparison results of the color sequence and the color setting sequence are the same, a color qualified signal is generated; if the color sequence and the color setting sequence are different, a color error signal is generated;

[0022] The comparison and analysis unit compares the change time with the actual change time, and generates a refresh qualified signal if the change time is the same as the actual change time, and generates a refresh abnormal signal if the change time is different from the actual change time;

[0023] The contrast analysis unit compares the picture brightness with the normal brightness point, and generates a normal brightness signal if the picture brightness is the same as the normal brightness point; and generates an abnormal brightness signal if the picture brightness is different from the normal brightness point;

[0024] The comparison and analysis unit sends the brightness abnormality signal, the refresh abnormality signal and the color error signal to the feedback alarm unit, and the feedback alarm unit generates a corresponding alarm reminder.

[0025] As a preferred embodiment of the present invention, the comparison and analysis unit obtains abnormal pixels, damaged pixels and abnormal brightness points through the picture acquisition unit, compares the abnormal pixels with the corresponding abnormal thresholds, generates an abnormal termination signal if the abnormal pixels exceed the corresponding abnormal thresholds, and does not respond if the abnormal pixels do not exceed the corresponding abnormal thresholds, compares the damaged pixels with the corresponding damage thresholds, generates a damage termination signal if the damaged abnormal pixels exceed the corresponding damage thresholds, and does not respond if the damaged pixels do not exceed the corresponding damage thresholds, and compares the abnormal brightness points with the corresponding brightness abnormality thresholds, generates a brightness termination signal if the abnormal brightness points exceed the corresponding brightness abnormality thresholds;

[0026] The comparison and analysis unit sends the abnormal termination signal, the damage termination signal and the brightness termination signal to the feedback alarm unit, and the feedback alarm unit generates a detection termination signal for the liquid crystal module being detected, and simultaneously generates a detection unqualified signal to mark the liquid crystal module, and sends the detection termination signal to the test control unit.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. In the present invention, when testing the liquid crystal module, the detection methods of the liquid crystal module are divided into multiple methods including color bad pixels, color noise, picture refresh speed and picture brightness, so as to perform a comprehensive detection operation on the liquid crystal module, ensure the perfection of the detection process, and improve the fault detection capability.

[0029] 2. In the present invention, when the liquid crystal module is inspected, the detected bad pixels, noise points and abnormal brightness points are inspected in real time, and when the bad pixels, noise points and abnormal brightness points reach the defective judgment threshold, the defective judgment result is generated in time, and the inspection is stopped at the same time, so that the inspection station can replace the next group of liquid crystal modules for inspection, avoiding the waste of inspection time caused by continuing to inspect the liquid crystal modules that have been judged as defective, thereby improving the inspection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0031] Figure 1 is a system block diagram of the present invention;

[0032] Figure 2 It is a system flow chart of the present invention. DETAILED DESCRIPTION

[0033] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. 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 ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Embodiment 1:

[0035] See also Figure 1 - Figure 2 As shown, a liquid crystal module performance test system based on data analysis includes a test control unit, a picture acquisition unit, a feedback alarm unit, a control conversion unit and a comparison analysis unit. The test control unit can perform signal control on the display picture of the liquid crystal module, so that the liquid crystal module outputs different test pictures. The control signal of the test control unit on the liquid crystal module includes: a color display control signal, a fast change control signal and a picture brightness control signal. The test control unit sends the control signal to the picture acquisition unit and the control conversion unit at the same time;

[0036] After the test control unit generates a color display control signal, it controls the liquid crystal display module to display the color set in the color display control. After the test control unit generates a fast change control signal, it controls the liquid crystal display module to quickly switch the screen. After the test control unit generates a screen brightness control signal, it controls the liquid crystal display module to adjust the brightness of the screen.

[0037] The picture acquisition unit acquires the picture displayed by the liquid crystal module through the image acquisition device, identifies the acquired image through the color quantization algorithm, and obtains the RGB channel value of the image. When the picture acquisition unit identifies the color quantization algorithm, it identifies each pixel on the image, obtains the RGB channel value of each pixel, compares the RGB channel values ​​on all pixels and creates multiple empty sets, and classifies the pixels with the same RGB channel value in the comparison result into the same set. Among all the sets, the set with the most pixels is recorded as the main color set, and the other sets are recorded as noise point sets. The picture acquisition unit extracts the noise point set, obtains the position corresponding to the pixel in the noise point set, and marks it as the noise point position set;

[0038] After the test control unit generates a color display control signal each time, the picture acquisition unit acquires the picture displayed by the liquid crystal module, and analyzes it after the acquisition is completed to obtain a main color set and a noise point position set;

[0039] The image acquisition unit selects a pixel point and counts the set type of the selected pixel point. If a pixel point appears entirely in the noise point position set, the selected pixel point is recorded as a damaged noise point. If a pixel point appears in both the noise point position set and the main color set, the selected pixel point is recorded as an abnormal pixel point.

[0040] The image acquisition unit calculates the position ratio of abnormal pixels in the noise position set and the main color set. If the ratio in the noise position set is greater than or equal to the ratio in the main color set, a high-frequency abnormal pixel is generated. If the ratio in the noise position set is less than the ratio in the main color set, a low-frequency abnormal pixel is generated.

[0041] The image acquisition unit captures and acquires images through an image acquisition device, and records the time when the captured image changes, and records the time point of each change as the actual change time;

[0042] The picture acquisition unit performs grayscale processing on the image captured by the image acquisition device, obtains the grayscale value of each pixel, compares the grayscale values ​​of all pixels, and records the grayscale value with the largest number of identical values ​​among the grayscale values ​​of all pixels as the reference grayscale. If the grayscale value of the pixel is the same as the reference grayscale, it is recorded as a normal brightness point. If the grayscale value of the pixel is different from the reference grayscale, it is recorded as an abnormal brightness point.

[0043] Embodiment 2:

[0044] See also Figure 1 - Figure 2As shown, the comparison and analysis unit obtains abnormal pixel points, damaged pixel points and abnormal brightness points through the picture acquisition unit, compares the abnormal pixel points with the corresponding abnormal threshold value, generates an abnormal termination signal if the abnormal pixel points exceed the corresponding abnormal threshold value, and does not respond if the abnormal pixel points do not exceed the corresponding abnormal threshold value, compares the damaged pixel points with the corresponding damage threshold value, generates a damage termination signal if the damaged abnormal pixel points exceed the corresponding damage threshold value, and does not respond if the damaged pixel points do not exceed the corresponding damage threshold value, and compares the abnormal brightness point with the corresponding brightness abnormal threshold value, generates a brightness termination signal if the abnormal brightness point exceeds the corresponding brightness abnormal threshold value;

[0045] The comparison and analysis unit sends the abnormal termination signal, the damage termination signal and the brightness termination signal to the feedback alarm unit. The feedback alarm unit generates a detection termination signal for the LCD module being detected, and at the same time generates a detection unqualified signal to mark the LCD module, and generates a corresponding alarm reminder. The feedback alarm unit sends the detection termination signal to the test control unit. The test control unit stops detecting the current LCD module after receiving the detection termination signal.

[0046] Embodiment three:

[0047] See also Figure 1 - Figure 2 As shown, after the conversion control unit obtains the control signal, it obtains the color setting, change time and screen brightness in the control signal, and sends the obtained color setting sequence, change time and screen brightness to the comparison and analysis unit, wherein the color setting sequence includes multiple colors and a color change order;

[0048] The comparison and analysis unit obtains multiple main color sets, actual change time and normal brightness points through the picture acquisition unit, sorts the multiple main color sets according to the order of appearance, generates a color sequence, and sequentially compares the color sequence with the color setting sequence. If the comparison results of the color sequence and the color setting sequence are the same, a color qualified signal is generated; if the color sequence and the color setting sequence are different, a color error signal is generated;

[0049] The comparison and analysis unit compares the change time with the actual change time, and generates a refresh qualified signal if the change time is the same as the actual change time, and generates a refresh abnormal signal if the change time is different from the actual change time;

[0050] The contrast analysis unit compares the picture brightness with the normal brightness point, and generates a normal brightness signal if the picture brightness is the same as the normal brightness point; and generates an abnormal brightness signal if the picture brightness is different from the normal brightness point;

[0051] The comparison and analysis unit sends the brightness abnormality signal, refresh abnormality signal and color error signal to the feedback alarm unit. The feedback alarm unit generates a corresponding alarm reminder, obtains the LCD module in the test state through the test control unit, and marks the LCD module with abnormalities.

[0052] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A liquid crystal module performance testing system based on data analysis, characterized in that: It includes a test control unit, a picture acquisition unit, a feedback alarm unit, a control conversion unit and a comparison analysis unit. The test control unit is used to generate a control signal to control the test of the liquid crystal module, and send the control signal to the picture acquisition unit and the control conversion unit at the same time; After receiving the control signal, the image acquisition unit can acquire the image of the liquid crystal module through the image acquisition device, analyze the color according to the acquisition result, generate damaged pixel points and abnormal pixel points, analyze the change time, generate the change time, analyze the image brightness, generate normal brightness points and abnormal brightness points; The control conversion unit can extract the control signal, obtain the color setting sequence, change time and screen brightness controlled by the control signal, and send them to the comparison and analysis unit; The comparison and analysis unit is used to compare the main color set of the picture acquisition unit with the color setting sequence, compare the actual change time of the picture acquisition unit with the change time, compare the normal brightness point of the picture acquisition unit with the picture brightness, and generate a color judgment signal, a brightness judgment signal and a refresh judgment signal according to the comparison results; The feedback alarm unit can analyze abnormal pixels, damaged pixels and abnormal brightness points during the detection process and generate a termination signal according to the analysis results; The picture acquisition unit captures and acquires images through an image acquisition device, and records the time when the captured image changes, and records the time point of each change as the actual change time; The image acquisition unit performs grayscale processing on the image acquired by the image acquisition device, obtains the grayscale value of each pixel, compares the grayscale values ​​of all the pixels, and records the grayscale value with the largest number of identical grayscale values ​​of all the pixels as the reference grayscale. If the grayscale value of the pixel is the same as the reference grayscale, it is recorded as a normal brightness point; if the grayscale value of the pixel is different from the reference grayscale, it is recorded as an abnormal brightness point; After acquiring the control signal, the control conversion unit acquires the color setting, change time and picture brightness in the control signal, and sends the acquired color setting sequence, change time and picture brightness to the comparison and analysis unit.

2. A liquid crystal module performance testing system based on data analysis according to claim 1, characterized in that: The control signals of the test control unit on the liquid crystal module include: color display control signal, rapid change control signal and screen brightness control signal. After the test control unit generates the color display control signal, it controls the liquid crystal display module to display the color set in the color display control. After the test control unit generates the rapid change control signal, it controls the liquid crystal display module to quickly switch the screen. After the test control unit generates the screen brightness control signal, it controls the liquid crystal display module to adjust the brightness of the screen.

3. The liquid crystal module performance testing system based on data analysis according to claim 1, characterized in that: The method for the picture acquisition unit to analyze color is: The picture acquisition unit identifies the acquired image through a color quantization algorithm, obtains the RGB channel value of each pixel on the image, compares the RGB channel values ​​of all pixels and creates multiple empty sets, classifies the pixels with the same RGB channel value in the comparison result into the same set, and among all the sets, the set with the most pixels is recorded as the main color set, and the other sets are recorded as noise sets. The picture acquisition unit extracts the noise set, obtains the positions corresponding to the pixels in the noise set, and marks them as noise position sets; Each time the test control unit generates a color display control signal, the picture acquisition unit acquires the picture displayed by the liquid crystal module, and analyzes the picture after acquisition to obtain a main color set and a noise point position set.

4. The liquid crystal module performance testing system based on data analysis according to claim 3, characterized in that: The picture acquisition unit selects a pixel point and counts the set type where the selected pixel point is located. If a pixel point appears entirely in the noise point position set, the selected pixel point is recorded as a damaged noise point. If a pixel point appears in both the noise point position set and the main color set, the selected pixel point is recorded as an abnormal pixel point. The image acquisition unit calculates the position ratio of abnormal pixel points in the noise position set and the main color set. If the ratio in the noise position set is greater than or equal to the ratio in the main color set, a high-frequency abnormal pixel point is generated; if the ratio in the noise position set is less than the ratio in the main color set, a low-frequency abnormal pixel point is generated.

5. The liquid crystal module performance testing system based on data analysis according to claim 1, characterized in that: The comparison and analysis unit obtains abnormal pixel points, damaged pixel points and abnormal brightness points through the picture acquisition unit, compares the abnormal pixel points with the corresponding abnormal threshold value, generates an abnormal termination signal if the abnormal pixel points exceed the corresponding abnormal threshold value, and does not react if the abnormal pixel points do not exceed the corresponding abnormal threshold value, compares the damaged pixel points with the corresponding damage threshold value, generates a damage termination signal if the damaged abnormal pixel points exceed the corresponding damage threshold value, and does not react if the damaged pixel points do not exceed the corresponding damage threshold value, and compares the abnormal brightness point with the corresponding brightness abnormal threshold value, generates a brightness termination signal if the abnormal brightness point exceeds the corresponding brightness abnormal threshold value; The comparison and analysis unit sends the abnormal termination signal, the damage termination signal and the brightness termination signal to the feedback alarm unit, and the feedback alarm unit generates a detection termination signal for the liquid crystal module being detected, and simultaneously generates a detection unqualified signal to mark the liquid crystal module, and sends the detection termination signal to the test control unit.

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