In general, when selecting the appropriate LED display, it's essential to consider both the characteristics of the display and the specific needs of the user. For areas such as station platforms, terminal entrances, large shopping malls, and elevator pedestrian guidance, a φ5.0 monochrome display is typically used. This type of display offers clear text, a low cost, and efficient fleet control.
For applications like corporate branding, advertising in banks, and shopping malls, where cost is a key factor, a φ3.75 dual-color display is commonly used. When full-color display is required, a φ5.0 full-color screen is more suitable. In large halls, a φ5.0 dual-color display is often chosen for its visual impact, while for high-quality display effects, φ10.0 full-color screens are preferred.
In service windows of business halls, such as those found in banks or post offices, the traditional method of using stickers was once common but lacked flexibility. Now, with the use of φ3 or φ5 displays, the service functions can be updated instantly, improving efficiency and user experience.
Outdoor displays face more challenging environmental conditions, so they require higher quality. Full-color displays are becoming the mainstream due to their high brightness, color accuracy, and ability to function in all weather conditions. However, they come at a higher cost. Dual-color displays, on the other hand, are more affordable, mature, and widely used, especially where text and color requirements are not high. The placement and viewing distance also significantly affect the price—screens facing northeast tend to be less expensive than those facing southwest.
LEDs are designed to last up to 10 million hours under ideal lab conditions, which equates to about 11 years. However, real-world performance is often affected by usage environment and operating methods. A display that only works well during the evening may not be considered fully functional. Just like a car that can run for 15 years but gets scrapped after being idle for three, the actual lifespan of an LED display depends heavily on how it's used.
Compliance with national standards is important, but many of these standards are outdated. For example, the 1995 ministerial standard for LED displays sets a tolerance of 3 out of 10,000 defective pixels. In practice, this means that even a small number of faulty points could make a display unsuitable for modern use. Today, most users would find such a level of quality unacceptable.
Another issue in the Chinese display industry is the lack of software development. Many companies focus only on manufacturing without investing in software solutions. Piracy is still a problem, and only a few companies offer genuine, legally licensed software.
When choosing an LED display, it's important to look at the performance-to-price ratio rather than just the price. A lower-cost option might not deliver the desired results. Grayscale is another critical factor, especially for dual-color and full-color displays. Some products falsely claim to have 256 grayscale levels, but in reality, they only support 16 or 64. A simple test, such as watching a VCD with fast-moving sports scenes, can reveal whether the display performs well.
Finally, it’s crucial to buy what you truly need. Don’t fall into the trap of purchasing unnecessary features that add to the cost without adding value. Application is the foundation—consultation, software upgrades, hardware maintenance, and after-sales support all depend on the manufacturer's capabilities. Ultimately, the right choice is one that meets your needs and offers some future-proofing.
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