I. Side View for Flatness: An Uneven Screen Will Result in Poor Display
Many people only focus on the front display during acceptance testing, but neglect the flatness of the screen – this is the most easily overlooked detail, yet it significantly impacts the subsequent user experience.
Correct method: Walk to the side of the LED display and observe whether the entire screen is completely on the same horizontal plane, without any ups or downs; then gently slide your hand back and forth across the screen surface to feel for any bumps, depressions, or sticking points.
Why check this way? An uneven screen will not only lead to uneven brightness when viewed from different angles, but will also cause noticeable gaps between the modules, seriously affecting the visual effect; long-term use may also lead to module loosening, increasing the risk of failure.
II. Front View for Misalignment: Even a 1-Pixel Deviation Makes the Image "Distorted"
LED displays are composed of countless small pixels. Once the modules are misaligned, even the highest-definition image will become "blurry."
Correct method: Ask the technician to play a grid test pattern, and carefully observe the screen from the front – the horizontal and vertical lines in the image must be straight and continuous, without any bending, breaks, or deviations. Even a 1-pixel misalignment should be addressed immediately.
Reminder: Especially for large screens used in conference rooms, exhibition halls, and outdoor advertising, the image accuracy requirements are higher. Misalignment problems will directly affect brand image and information transmission effectiveness, so be sure to pay close attention during acceptance testing!
III. Long-Distance Photography to Test for Water Ripples: The "Touchstone" for High-Definition and High Refresh Rate
Many LED displays now boast "high-definition and high refresh rate," but whether this is true can be tested with a mobile phone.
Correct method: Take out your mobile phone, stand 5-10 meters away from the screen, and take a picture (without zooming in or out). Check if the image in the photo shows "water ripples" or "motion blur." If the image is clear and without any ripples, it means it's a true high-definition, high-refresh-rate screen; otherwise, it may be a low-refresh-rate, inferior screen.
It's important to know that low-refresh-rate large screens are prone to blurring and stuttering when playing videos and dynamic images, especially in scenarios such as live broadcasts and sports broadcasts, resulting in a very poor user experience. IV. Precise Size Verification: Millimeter-Level Error Can Result in the Loss of a Processor.
The idea of "a small difference doesn't matter" is absolutely unacceptable when accepting LED displays! Errors in screen dimensions directly affect your costs and usage requirements.
Correct procedure: Use a professional measuring tape to accurately measure the effective display area of the screen; the accuracy must be at the millimeter level! Then compare it against the dimensions specified in the contract. For example, if the contract specifies 10㎡, but the actual measurement is only 9.8㎡, it may seem like only a 0.2㎡ difference, but the price difference could be enough to buy a professional processor.
Special attention: Some unscrupulous vendors may deliberately manipulate the "effective display area" and "overall dimensions." During acceptance, you must clearly measure the area that can display images correctly to avoid being scammed.
V. Strict Configuration Verification: Brand, Code, and Quantity – Not One Can Be Missing
This is the final step in acceptance and crucial for ensuring subsequent maintenance – the verification of core components must not be taken lightly!
Correct procedure: Compare the following items against the contract and packing list:
The batch number of the modules and the code of the power supply must be exactly the same as the packing list;
The brand of the receiving card and processor must match the brand specified in the contract (to avoid being replaced with generic or refurbished parts);
The quantity of all accessories must be counted one by one to ensure that nothing is missing.
