1. Appearance inspection
Flatness: Check whether the display surface is flat and there are no obvious gaps or bumps between modules.
Color consistency: Observe whether the colors of each module are uniform and there is no color difference.
Surface cleaning: Ensure that there are no scratches, stains or dust on the display surface.
Frame and structure: Check whether the frame is firm and the structure is stable without obvious deformation or looseness.
2. Brightness and uniformity
Brightness test: Use a brightness meter to measure the brightness of each area to ensure that it meets the specification requirements.
Uniformity check: Observe whether the brightness of the display is uniform and there are no obvious bright and dark areas.
3. Color performance
Color consistency: Display pure color images and check whether the colors of each area are consistent.
Color reproduction: Display color images and check whether the color reproduction is accurate and there is no color deviation.
4. Resolution and clarity
Resolution check: Display high-resolution images and check whether the details are clear.
Pixel check: Observe whether there are dead pixels, bright spots or dark spots.
5. Viewing angle check
Viewing angle test: Observe the display screen from different angles to ensure that there is no obvious change in color and brightness.
6. Refresh rate and grayscale
Refresh rate test: Use professional equipment to detect the refresh rate to ensure no flicker.
Grayscale test: Display grayscale gradient images to check whether the transition is smooth.
7. Functional test
Signal input: Test the compatibility of different signal sources (such as HDMI, DVI, VGA, etc.).
Control software: Check whether the control software functions normally, such as brightness and color adjustment.
Temperature rise test: After long-term operation, check whether the display temperature is within the normal range.
8. Safety and environmental protection
Electrical safety: Check whether the power cord and interface meet safety standards.
Environmental protection requirements: Ensure that the materials meet environmental protection standards such as RoHS.
9. Packaging and transportation
Packaging inspection: Confirm that the packaging is intact and has shock and moisture-proof measures.
Transportation inspection: Ensure that there is no damage during transportation.
10. Documents and certificates
Document inspection: Check whether the product certificate, manual, warranty card, etc. are complete.
Certification inspection: Confirm that the product has passed relevant certifications, such as CE, FCC, etc.
Inspection method
Visual inspection: Observe the appearance, color, brightness, etc. with the naked eye.
Instrument detection: Use equipment such as brightness meter and color analyzer for precise measurement.
Function test: Test various functions through actual operation.
Sampling inspection: Sampling inspection of batch Products to ensure overall quality.
Through the above standards and methods, it can be ensured that the quality of indoor LED display screens meets the requirements.
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