Are you also looking for a large LED screen that saves energy and is not harmful to your eyes? Recently, many shopping malls and office buildings are replacing this kind of green and environmentally friendly display screens, but it is really easy for novices to get into trouble when they first come into contact with them. Last week, a friend who owns a gym asked me: "Why don't other people's screens look dazzling, but my LED screen looks like a searchlight at night?" "Let’s talk about this today.

When it comes to green LED display screens, it does not simply mean that the screen color is green (some customers have actually misunderstood this before). What it mainly says is​ ​Low power consumption, low blue light, recyclable​ ​These three characteristics. Just like when we buy an air conditioner, we have to choose a first-class energy efficiency one. Now, when choosing a display screen, we also have to look at environmental indicators - especially in a place like a shopping mall that is open for more than ten hours, the electricity bill can vary two to three times.

​​How to judge whether it is a true green product​ ​? I have put together a comparison table for you:

Recently, a restaurant chain owner told me a real case: the monthly electricity bill for a certain type of screen they used was 12,000 yuan. After replacing it with an LED screen that passed international environmental protection certification, the electricity bill was directly reduced to 4,000 yuan. The key is that the brightness of the screen can be automatically adjusted according to the ambient light. It can still be seen clearly at noon, and it will not be so bright that it scares away guests at night.

Now comes the point——​ ​Where to find reliable green LED screens​ ​? Many novices will directly search for "LED display manufacturer rankings". In fact, this method is already outdated. Last month, a training institution was cheated by the so-called "top ten brands". The screen it bought was said to be an energy-saving model. However, when tested with professional instruments, the blue light radiation exceeded the standard by more than three times.

When choosing a manufacturer, you must look at these three hard indicators:

1. ​​Is there dual certification of CE and CCC?​ ​(Many small factories only have one of them)
2. ​​Can you provide a third-party testing report?​ ​(Focus on the LM-80 light source life test)
3. ​​Does the after-sales service include a five-year warranty?​ ​(Manufacturers that guarantee a five-year warranty will basically not be bad)

A friend who runs a community convenience store suffered a loss. He tried to find a manufacturer at a low price, but after half a year of use, the color patches on the screen started to peel off. As a result, the manufacturer had already left. Later, I switched to a brand with its own factory. After using it for more than three years, there was no deadlock. Their technician said the key is​ ​Fully automated production line​ ​, more than ten times more accurate than manual welding.

Recently, many people have been asking: "Why are some green LED screens sold twice as much as ordinary models?" "In fact, the secret here lies in​ ​Common cathode drive technology​ ​. To put it simply, the red, green and blue lamp beads are powered separately, which saves 40% of power compared to traditional common anode technology. It may be several thousand dollars more expensive, but the difference in electricity bills will be recouped in half a year. Just like buying energy-saving light bulbs, although the unit price is high, it is more cost-effective to use them in the long run.

Another common question is: "What is the difference between outdoor and indoor green screens?" "It depends​ ​Brightness adaptive function​ ​. A good outdoor screen can reach 7,500 nits at noon and automatically drop to 2,000 nits at night. It has at least three more years of life than a screen with a fixed brightness. The previous fence screen project in the stadium did not change the modules in three years because it used an intelligent dimming system.

When it comes to installation and maintenance, what is most easily overlooked by novices is​ ​Thermal design​ ​. The most exaggerated case I have ever seen is a screen installed in a supermarket that turned yellow after two months of use. When it was taken apart, it was found that there was no cooling fan installed. Now all reliable manufacturers will do it​ ​Thermal simulation test​ ​The temperature of the box with its own heat dissipation channel is about 15°C lower than that of the ordinary structure, which is very important for delaying the aging of the lamp beads.

Finally, I would like to remind friends who are planning to purchase: Be sure to ask the manufacturer to​ ​Photobiosafety Level Report​ ​. Last year, a kindergarten installed a screen with excessive blue light, causing the children to rub their eyes collectively. The current internationally accepted standard is exemption level (RG0). You won’t get sore eyes after staring at this screen for three hours.

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