Mini LED lighting equipment test consistency adjusting method and system

Abstract

The invention discloses a Mini LED lighting equipment test consistency adjusting method and system, and relates to the technical field of LED test.The method comprises the steps of test equipment calibration processing and test equipment consistency screening processing, and the test equipment calibration processing comprises the steps that test equipment is initialized; performing calibration processing on the configuration file of the test equipment; performing calibration processing on the electrical parameters of the test equipment; respectively carrying out lightening test on different batches of standard light sources through the test equipment, and analyzing and processing test results; and performing fine tuning processing on the test equipment according to an analysis result. By adopting the method and the device, the problem of inconsistent test results caused by factors such as test parameter difference, environment change and equipment aging of the existing lightening test equipment can be effectively solved, and the accuracy and the reliability of Mini LED product test are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of LED testing, and particularly to a method and system for adjusting the test consistency of a Mini LED lighting device. Background Art

[0002] Mini LED is a new display technology based on miniature LED chips, which is between traditional LEDs and Micro LEDs. Its core feature is to achieve higher brightness, contrast, and finer local dimming effects through smaller-sized LED chips (usually 50 - 200 μm) and high-density arrangements (such as thousands to tens of thousands of zones for light control).

[0003] In the production and application process of Mini LED, the lighting test is a crucial link for detecting indicators such as the luminous performance, color characteristics, and electrical parameters of Mini LED. However, due to the influence of various factors on the Mini LED lighting test equipment, such as environmental temperature, humidity, power supply stability, and aging of optical sensors, it is difficult to maintain the consistency of the equipment for a long time. When the same model of equipment is used to test the same Mini LED product at different times or in different locations, significantly different results may be obtained, which brings great troubles to the quality control and performance evaluation of Mini LED products, seriously affecting the production efficiency and product quality reliability of the entire MiniLED industrial chain. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a method and system for adjusting the test consistency of a Mini LED lighting device, which can improve the accuracy and reliability of Mini LED product testing.

[0005] To solve the above technical problem, the present invention provides a method for adjusting the test consistency of a Mini LED lighting device, including calibration processing of the test equipment and consistency screening processing of the test equipment. The steps of the calibration processing of the test equipment include: initializing the test equipment; calibrating the configuration file of the test equipment; calibrating the electrical parameters of the test equipment; respectively lighting and testing standard light sources of different batches through the test equipment, and analyzing and processing the test results; and performing fine-tuning processing on the test equipment according to the analysis results.

[0006] As an improvement of the above solution, the step of initializing the test equipment includes: detecting the power module of the test equipment to adjust the electrical parameters of the power module; resetting and calibrating the camera module of the test equipment to adjust the optical parameters of the camera module.

[0007] As an improvement to the above solution, the steps of calibrating the configuration file of the test device include: collecting the current brightness value of the standard light source in real time through a brightness acquisition device; adjusting the configuration file of the test device according to the current brightness value and a preset target brightness value to make the current brightness value consistent with the preset target brightness value; the configuration file includes exposure information, exposure time information, and gain information.

[0008] As an improvement to the above solution, the steps of calibrating the electrical parameters of the test device include: collecting the actual voltage value of the power supply module of the test device through an electrical acquisition device, and calculating the actual current value according to the actual voltage value and the preset resistance value of the power supply module; comparing the actual current value with a preset standard current value, and adjusting the electrical parameters of the current measurement circuit of the power supply module to make the actual current value consistent with the preset standard current value; comparing the actual voltage value with a preset standard voltage value, and adjusting the electrical parameters of the voltage measurement circuit of the power supply module to make the actual voltage value consistent with the preset standard voltage value.

[0009] As an improvement to the above solution, the steps of lighting and testing standard light sources of different batches through the test device and analyzing and processing the test results include: lighting and testing standard light sources of different batches respectively, and collecting the real-time brightness values of the standard light sources of different batches through the test device; preprocessing the real-time brightness values to remove abnormal data values in the real-time brightness values; comparing the preprocessed real-time brightness values with a preset consistency index range to determine whether the test device is within the consistency index range. If the determination is yes, the calibration process of the test device is completed. If the determination is no, the test device is fine-tuned.

[0010] As an improvement to the above solution, the steps of fine-tuning the test device include: lighting and testing standard light sources of different batches respectively, and collecting the detection parameters of the standard light sources of different batches through a brightness acquisition device and an electrical acquisition device, where the detection parameters include light intensity information, current information, and voltage information; respectively determining whether the light intensity information, current information, and voltage information all meet the preset standards; if the determination is yes, perform the consistency screening process of the test device; if the determination is no, fine-tune the test device according to the detection parameters that exceed the preset standards.

[0011] As an improvement of the above solution, the step of finely tuning the test device according to the detection parameters exceeding the preset standard includes: if the light intensity information exceeds the preset standard, calibrating the configuration file of the test device again; if the current information or voltage information exceeds the preset standard, calibrating the electrical parameters of the test device again.

[0012] As an improvement of the above solution, the steps of consistency screening and processing of the test device include: at different time periods, respectively lighting and testing standard light sources of different batches, and collecting test results through the test device; analyzing the consistency of the test results of standard light sources of different batches in the same time period on different test devices, and performing the test device calibration process again on the test device whose test results exceed the consistency index range; analyzing the consistency of the test results of standard light sources of different batches in different time periods on the same test device, and performing the test device calibration process again on the test device whose test results exceed the consistency index range.

[0013] As an improvement of the above solution, the method for adjusting the test consistency of the Mini LED lighting device further includes: after calibrating the electrical parameters of the test device, calibrating the configuration file of the test device again.

[0014] Correspondingly, the present invention also provides a system for adjusting the test consistency of a Mini LED lighting device, including: a test device for lighting and testing a light source; a brightness acquisition device for acquiring the optical information of the light source; an electrical acquisition device for acquiring the electrical information of the test device; a computer device including a memory and a processor, the memory storing a computer program, wherein the processor implements the steps of the above method for adjusting the test consistency of the Mini LED lighting device when executing the computer program.

[0015] Implementing the present invention has the following beneficial effects:

[0016] The method for adjusting the test consistency of the Mini LED lighting device of the present invention realizes the consistency adjustment of the test device by separately calibrating and finely tuning the electrical parameters, optical parameters, configuration file and electrical parameters, and analyzing the test data. It can effectively overcome the problem of inconsistent test results caused by factors such as test parameter differences, environmental changes, and equipment aging in existing lighting test devices, ensuring accurate and reliable testing of Mini LEDs under various conditions, and providing a strong guarantee for the quality control and product research and development of Mini LED manufacturers. Description of the Drawings

[0017] Figure 1It is the flowchart of the first embodiment of the method for adjusting the test consistency of the Mini LED lighting device of the present invention;

[0018] Figure 2 It is the flowchart of the second embodiment of the method for adjusting the test consistency of the Mini LED lighting device of the present invention;

[0019] Figure 3 It is the schematic structural diagram of the embodiment of the system for adjusting the test consistency of the Mini LED lighting device of the present invention. Detailed implementation manners

[0020] To make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It is hereby declared that the directional terms such as up, down, left, right, front, back, inside and outside that appear or will appear in the text of the present invention are only based on the accompanying drawings of the present invention, and they do not specifically limit the present invention.

[0021] See Figure 1 , Figure 1 which shows the flowchart of the first embodiment of the method for adjusting the test consistency of the Mini LED lighting device of the present invention, and it includes:

[0022] S101, initialize the test equipment;

[0023] Correspondingly, the steps of initializing the test equipment include:

[0024] (1) Detect the power module of the test equipment to adjust the electrical parameters of the power module;

[0025] In practical applications, each functional module of the test equipment needs to be initialized separately; for the power module, the output voltage range and current stability of the power module can be detected to ensure that they meet the preset standards.

[0026] (2) Reset and calibrate the camera module of the test equipment to adjust the optical parameters of the camera module.

[0027] Under standard test conditions (specific temperature, humidity, power supply voltage stability, etc.), light up the standard light source, connect the camera through the camera reset calibration tool software, and use a ruler to confirm the actual physical size (such as width, height) of the standard light source; among them, the standard light source can be an LED light source lamp board, but it is not limited thereto.

[0028] Enter the resolution and grayscale information of the standard light source on the camera reset calibration tool software;

[0029] Adjust the height of the camera and fine-tune the angle until the imaging of the standard light source is adjusted within the rectangular frame of the camera, and the imaging size is adjusted as close as possible to the size of the rectangular frame, and the top, bottom, left, and right of the imaging are kept parallel to the corresponding sides of the rectangular frame as much as possible;

[0030] Fix the camera aperture and fine-tune the focal length to make the imaging of the standard light source clear, so as to ensure that the test results are not interfered by environmental factors and maintain consistency.

[0031] S102, calibrate the configuration file of the test equipment;

[0032] Correspondingly, the steps for calibrating the configuration file of the test equipment include:

[0033] (1) Real-time collect the current brightness value of the standard light source through a brightness collection device;

[0034] The brightness collection device can be a light gun, but it is not limited to this, as long as the measurement of brightness can be achieved; in actual applications, the light gun can be vertically placed directly above the surface of the standard light source to test the current brightness value of the standard light source;

[0035] (2) Adjust the configuration file of the test equipment according to the current brightness value and the preset target brightness value to make the current brightness value consistent with the preset target brightness value;

[0036] It should be noted that the configuration file includes exposure information, exposure time information, and gain information. Therefore, by adjusting the exposure information, exposure time information, and gain information in the configuration file in real time, the current brightness value of the standard light source can be effectively controlled, so that the current brightness value of the standard light source is consistent with the target brightness value required by the manufacturer, and the consistency of the brightness detection data meets the standard.

[0037] S103, calibrate the electrical parameters of the test equipment;

[0038] Correspondingly, the steps for calibrating the electrical parameters of the test equipment include:

[0039] (1) Collect the actual voltage value of the power supply module of the test equipment through an electrical collection device, and calculate the actual current value according to the actual voltage value and the preset resistance value of the power supply module;

[0040] The electrical collection device can be a multimeter, but it is not limited to this, as long as the measurement of voltage can be achieved.

[0041] (2) Compare the actual current value with the preset standard current value, and adjust the electrical parameters of the current measurement circuit of the power supply module to make the actual current value consistent with the preset standard current value;

[0042] For the power supply module, calculate the actual current value based on the known predicted resistance value and the measured actual voltage value, compare the actual current value with the standard current value, and adjust the electrical parameters such as the amplification factor and zero drift of the current measurement circuit to meet the current measurement accuracy requirements.

[0043] (3) Compare the actual voltage value with the preset standard voltage value, and adjust the electrical parameters of the voltage measurement circuit of the power supply module to make the actual voltage value consistent with the preset standard voltage value.

[0044] Use a standard voltage source to calibrate the voltage measurement circuit, adjust its gain and offset electrical parameters to ensure the accuracy and consistency of voltage measurement.

[0045] S104, turn on and test the standard light sources of different batches through the test equipment respectively, and analyze and process the test results;

[0046] Correspondingly, the steps of turning on and testing the standard light sources of different batches through the test equipment respectively and analyzing and processing the test results include:

[0047] (1) Turn on and test the standard light sources of different batches respectively, and collect the real-time brightness values of the standard light sources of different batches through the test equipment;

[0048] (2) Preprocess the real-time brightness values to remove the abnormal data values in the real-time brightness values;

[0049] The dark spots and bad points in the real-time brightness values can be removed by preprocessing the real-time brightness values.

[0050] For example, if the brightness of a normal point is generally 1 and the brightness of a dark point is generally 0.4, then the points less than 0.5 can be regarded as abnormal points and removed;

[0051] Another example is that the 4σ criterion can be used to judge abnormal points, that is, by calculating the mean value and standard deviation, the data outside the range of four times the standard deviation of the mean value is regarded as an abnormal value and removed.

[0052] (3) Compare the preprocessed real-time brightness values with the preset consistency index range to judge whether the test equipment is within the consistency index range,

[0053] Generally, the preset consistency index range is that the standard deviation of the real-time brightness values of the standard light sources of different batches is less than 0.2 cd / m2, but it is not limited to this and can be set according to the actual situation.

[0054] (4) If the judgment is yes, the calibration process of the test equipment is completed;

[0055] (5) If the judgment is no, the test equipment is finely adjusted.

[0056] S105. Fine-tune the test equipment according to the analysis results.

[0057] Correspondingly, the steps for fine-tuning the test equipment include:

[0058] (1) Light up and test standard light sources of different batches respectively, and collect detection parameters of the standard light sources of different batches through a brightness acquisition device and an electrical acquisition device;

[0059] The detection parameters include light intensity information, current information, and voltage information;

[0060] (2) Determine respectively whether the light intensity information, current information, and voltage information all meet the preset standards;

[0061] It should be noted that the preset standards include a light intensity preset standard, a current preset standard, and a voltage preset standard.

[0062] (3) If the judgment is yes, perform consistency screening processing on the test equipment;

[0063] If the light intensity information, current information, and voltage information all meet the preset standards, perform consistency screening processing on the test equipment.

[0064] (4) If the judgment is no, fine-tune the test equipment according to the detection parameters that exceed the preset standards.

[0065] Furthermore, the steps for fine-tuning the test equipment according to the detection parameters that exceed the preset standards include:

[0066] (4.1) If the light intensity information exceeds the preset standard, calibrate the configuration file of the test equipment again;

[0067] (4.2) If the current information or voltage information exceeds the preset standard, calibrate the electrical parameters of the test equipment again.

[0068] Generally, only fine-tune the parameters with larger deviations to further optimize the consistency of the test equipment.

[0069] During the fine-tuning process, follow the principle of preferentially adjusting the module that has the greatest impact on the parameter, and avoid over-adjustment resulting in imbalance of other parameters.

[0070] Combining step S101 to step S105 can be collectively referred to as the "test equipment calibration processing" step.

[0071] S106. Consistency screening processing of the test equipment;

[0072] Correspondingly, the steps for consistency screening processing of the test equipment include:

[0073] (1) At different time periods, the standard light sources of different batches are respectively lit for testing, and the test results are collected by the test equipment;

[0074] Select a certain number of representative standard light sources. The indicators such as luminous performance, electrical parameters, and control parameters of these standard light sources have been accurately measured and are within the specified tolerance range. These standard light sources are successively placed on the fixture of the test equipment for lighting test. The test equipment tests the samples according to the normal test process and records the test results.

[0075] (2) Analyze the consistency of the test results of the standard light sources of different batches in the same time period on different test equipment, and perform test equipment calibration processing again on the test equipment that exceeds the consistency index range;

[0076] (3) Analyze the consistency of the test results of the standard light sources of different batches in different time periods on the same test equipment, and perform test equipment calibration processing again on the test equipment that exceeds the consistency index range.

[0077] Through statistical analysis of the test results of multiple batches and multiple time periods, the present invention calculates statistical parameters such as the average value and standard deviation of the test results. If it is found that the deviation between the test result of a certain test equipment for the standard light source and the overall average value exceeds the preset consistency range, further check the parameter settings and calibration status of the test equipment, and re-calibrate and debug the links that may have deviations until the test result of this test equipment for the standard light source has good consistency with the test results of other normal test equipment, so as to ensure high consistency and comparability of the test results between different test equipment and the same test equipment at different times.

[0078] Therefore, through the present invention, the situation of unstable test results caused by equipment consistency problems in the prior art is effectively solved, and accurate and reliable testing of Mini LEDs can be ensured under various conditions.

[0079] See Figure 2 , Figure 2 shows the flowchart of the second embodiment of the test consistency adjustment method for the Mini LED lighting equipment of the present invention, which includes:

[0080] S201, Initialize the test equipment;

[0081] S202, Calibrate the configuration file of the test equipment;

[0082] S203, Calibrate the electrical parameters of the test equipment;

[0083] S204, Calibrate the configuration file of the test equipment again;

[0084] Different from the first embodiment shown Figure 1 in this embodiment, after calibrating the electrical parameters in step S203, it is necessary to collect the current brightness value of the standard light source in real time through the brightness acquisition device again, and adjust the configuration file of the test device according to the current brightness value and the preset target brightness value to make the current brightness value consistent with the preset target brightness value, further improving the calibration effect.

[0085] S205. Light the standard light sources of different batches through the test device respectively, and analyze and process the test results;

[0086] S206. Fine-tune the test device according to the analysis results;

[0087] S207. Consistency screening process for the test device.

[0088] Therefore, after completing steps S201 to S207, the test device can be put into normal use.

[0089] Furthermore, after the test device is put into normal use, a regular review and maintenance mechanism can be established. That is, every certain time period (for example, one week or one month, determined according to the usage frequency and environmental stability of the test device), repeat part or all of the content of steps S201 to S207 to review the consistency of the test device. At the same time, during daily use, conduct routine maintenance on the test device, such as cleaning the test camera, cleaning / replacing the connector, and checking the heat dissipation of the power module to ensure that the device is always in good working condition. If a deviation in the consistency of the test device is found during the review process, make timely adjustments and calibrations to ensure that the test device can always provide stable and consistent lighting test results during long-term use.

[0090] In summary, through the present invention, it is possible to effectively overcome the problem of inconsistent test results caused by factors such as test parameter differences, environmental changes, and equipment aging in existing lighting test devices, improve the accuracy and reliability of Mini LED product testing, and provide a strong guarantee for the quality control and product R & D of Mini LED production enterprises.

[0091] See Figure 3 , Figure 3 shows the specific structure of the Mini LED lighting device test consistency adjustment system 100 of the present invention, including a test device 1, a brightness acquisition device 2, an electrical acquisition device 3, and a computer device 4. Specifically:

[0092] The test device 1 is used to perform lighting tests on light sources;

[0093] A brightness acquisition device 2, configured to acquire the optical information of a light source; preferably, the brightness acquisition device 2 may be a light gun, but is not limited thereto, as long as the measurement of brightness can be achieved;

[0094] An electrical acquisition device 3, configured to acquire the electrical information of a test device; preferably, the electrical acquisition device 3 may be a multimeter, but is not limited thereto, as long as the measurement of voltage can be achieved;

[0095] A computer device 4, including a memory and a processor, where the memory stores a computer program. Among them, when the processor executes the computer program, the steps of the above-mentioned Mini LED lighting device test consistency adjustment method are implemented.

[0096] Therefore, through the present invention, it can be ensured that the test device always maintains good consistency, effectively solve the differences existing in the test device itself, and provide strong support for R & D and process improvement; at the same time, the present invention can improve the reliability of quality control, the comparability and traceability of data.

[0097] The above is the preferred implementation manner of the present invention. It should be noted that for those of ordinary skill in the art in the technical field, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present invention.

Claims

1. A method for adjusting the test consistency of a Mini LED lighting device, characterized in that, Including test equipment calibration processing and test equipment consistency screening processing, the steps of the test equipment calibration processing include: Initializing the test equipment; Calibrating the configuration file of the test equipment; Calibrating the electrical parameters of the test equipment; Turning on and testing standard light sources of different batches through the test equipment respectively, and analyzing and processing the test results; Performing fine-tuning processing on the test equipment according to the analysis results.

2. The method for adjusting the test consistency of the Mini LED lighting device according to claim 1, wherein The steps of initializing the test equipment include: Detecting the power supply module of the test equipment to adjust the electrical parameters of the power supply module; Resetting and calibrating the camera module of the test equipment to adjust the optical parameters of the camera module.

3. The method for adjusting the test consistency of the Mini LED lighting device according to claim 1, characterized in that, The steps of calibrating the configuration file of the test equipment include: Real-time collecting the current brightness value of the standard light source through a brightness acquisition device; Adjusting the configuration file of the test equipment according to the current brightness value and a preset target brightness value to make the current brightness value consistent with the preset target brightness value; The configuration file includes exposure information, exposure time information and gain information.

4. The method for adjusting the test consistency of the Mini LED lighting device according to claim 1, wherein, The steps of calibrating the electrical parameters of the test equipment include: Collecting the actual voltage value of the power supply module of the test equipment through an electrical acquisition device, and calculating the actual current value according to the actual voltage value and the preset resistance value of the power supply module; Comparing the actual current value with a preset standard current value, and adjusting the electrical parameters of the current measurement circuit of the power supply module to make the actual current value consistent with the preset standard current value; Comparing the actual voltage value with a preset standard voltage value, and adjusting the electrical parameters of the voltage measurement circuit of the power supply module to make the actual voltage value consistent with the preset standard voltage value.

5. The method for adjusting the test consistency of the Mini LED lighting device according to claim 1, wherein The steps of turning on and testing standard light sources of different batches through the test equipment respectively, and analyzing and processing the test results include: Turning on and testing standard light sources of different batches respectively, and collecting the real-time brightness values of the standard light sources of different batches through the test equipment; Preprocessing the real-time brightness values to remove abnormal data values in the real-time brightness values; Comparing the preprocessed real-time brightness values with a preset consistency index range to determine whether the test equipment is within the consistency index range, If the determination is yes, the test equipment calibration processing is completed, If the determination is no, fine-tuning processing is performed on the test equipment.

6. The method for adjusting the test consistency of the Mini LED lighting device according to claim 1 or 5, characterized in that The steps of performing fine-tuning processing on the test equipment include: Turning on and testing standard light sources of different batches respectively, and collecting the detection parameters of the standard light sources of different batches through a brightness acquisition device and an electrical acquisition device, where the detection parameters include light intensity information, current information and voltage information; Respectively determining whether the light intensity information, current information and voltage information all meet the preset standards; If the determination is yes, the test equipment consistency screening processing is executed; If the determination is no, fine-tuning processing is performed on the test equipment according to the detection parameters that exceed the preset standards.

7. The method for adjusting the test consistency of the Mini LED lighting device according to claim 6, wherein, The steps of performing fine-tuning processing on the test equipment according to the detection parameters that exceed the preset standards include: If the light intensity information exceeds the preset standard, calibrate the configuration file of the test device again; If the current information or voltage information exceeds the preset standard, calibrate the electrical parameters of the test device again.

8. The method for adjusting the test consistency of the Mini LED lighting device as described in claim 1, wherein, The steps of the consistency screening process for the test device include: At different time periods, light the standard light sources of different batches for testing respectively, and collect the test results through the test device; Analyze the consistency of the test results of the standard light sources of different batches in the same time period on different test devices, and perform the test device calibration process again on the test devices that exceed the consistency index range; Analyze the consistency of the test results of the standard light sources of different batches in different time periods on the same test device, and perform the test device calibration process again on the test devices that exceed the consistency index range.

9. The method for adjusting the test consistency of the Mini LED lighting device according to claim 1, wherein, It also includes: After calibrating the electrical parameters of the test device, calibrate the configuration file of the test device again.

10. A Mini LED lighting device test consistency adjustment system, characterized in that, It includes: A test device for lighting the light source for testing; A brightness acquisition device for acquiring the optical information of the light source; An electrical acquisition device for acquiring the electrical information of the test device; A computer device includes a memory and a processor. The memory stores a computer program. It is characterized in that when the processor executes the computer program, it realizes the steps of the Mini LED lighting device test consistency adjustment method according to any one of claims 1 to 9.

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