Oh, many people have asked me recently: "I want to buy an LED dual-color screen, why do I always get into tricks? " Let’s talk about this today. What do you think? Last year, my neighbor Lao Wang tried to buy a so-called "high-end two-color screen" for more than 3,000 yuan. As a result, only two months after installing the store, the red lamp beads were extinguished by one-third. From a distance, it looked like they had red eyes... Is this money unjust?

1. First look at these three hard indicators when selecting a screen

​​"Isn’t the two-color screen red and green colors? What's the point? "​ ​ Don’t underestimate it, there are many tricks here!

1. ​​Brightness must be good at magic​​
   It is bright enough in the sun during the day (recommended ≥1500cd/m²) and automatically dimmed at night without any dazzlingness. Some screens do not dim automatically, and they light up like searchlights at night, so neighbors all have to complain about light pollution.

2. ​​Waterproofing is not a look​​
   Especially for those installed outdoors, you must determine the IP65 protection level. There was a restaurant owner who bought a waterproof one without water, but it turned out that fish could be raised on the screen on rainy days, and the repair fee was even more expensive than buying a screen.

3. ​​Pixel spacing hidden mystery​​
   For example, the P10 screen is suitable for viewing 10 meters away. If you install it at the entrance of a small supermarket and passers-by are 3 meters away, you will know how to choose P6. The difference here can cost an air conditioner, so don’t waste money.

2. How to crack the price?

Last month, I helped my friend watch the screen and found a strange phenomenon: the two-color screen with the same P10 specifications have 2,800/㎡, and some dare to ask for 5,800. Later, I spent half a month on the market to figure it out:

• ​​Lamp beads are divided into three or six or nine grades​​
  Ordinary lamp beads cost 1 cent per, and imported Sun Ya lamp beads cost 8 cents. Some manufacturers use refurbished lamp beads, which light up very brightly at the beginning and finished playing in half a year. Teach you a trick: let the seller show it​ ​Lamp bead batch test report​​。

• ​​The most tricky power supply​​
  A poor power supply is prone to heat and catch fire, and a good one can last for five years without breaking. There is a logistics park with cheap use of miscellaneous power supplies, but in the summer, the goods are burned and the money is lost.

• ​​Don't make do with the control system​​
  Have you ever seen a mobile phone that can be modified by online phones? All new screens now have this function. If you buy an old money, you have to apply for a computer and change your words. You have to hire a clerk who knows how to use a computer and pay more every month.

3. After-sales installation, there is a big thunder hidden

Do you think it's all done after buying the screen? wrong! Installation is the highlight:

1. ​​Steel structure must be reliable​​
   Last year, a store's screens, steel frames and screens were blown away. Why? Used 1.2mm thin steel pipe to cut corners. For regular installation, 2.0mm galvanized steel pipes must be used, and wind resistance calculations must be made.

2. ​​Repair response speed​​
   The key point is here! Ask how long it takes for the maintenance master to arrive. The screen bought by a chain pharmacy was broken for half a month and no one repaired it. Customers thought it was closed down. This loss is much more expensive than the screen.

3. ​​Don't listen to the warranty​​
   Have you ever seen a "five-year warranty" but only one year of lamp beads? This routine is like a mobile phone warranty - the motherboard is for one year, but the battery is not guaranteed. Be sure to let the seller take it​ ​Warranty period for each component​​Write into the contract.

4. Ask and answer key questions

​​Q: Is it reliable to buy online or to buy in physical stores? ​ ​
A: Small sizes (such as within 2 square meters) can be purchased online, but it is recommended to conduct on-site inspections for more than 5 square meters. Last year, the industry report said that the online after-sales dispute rate of large screens is more than three times that of offline. Why? There are too many troubles in transportation and installation.

​​Q: How to determine whether it is a refurbished screen? ​ ​
A: Three views and one smell! Check whether the screws have been twisted, whether the interface is oxidized, whether the power supply production date is recent, and whether there is a pungent glue smell. There is another tough trick - let the seller take you to see the screen being assembled.

​​Q: Is installment payment cost-effective? ​ ​
A: Be careful! Some merchants count interest into the total price. Judging from the low monthly payment, they actually spend 20% more. It is best to pay 3331: place an order 30%, ship 30%, accept 30%, and leave 10% warranty to suppress the final payment.

​​The editor tells the truth​​
Buying a two-color screen is like finding a partner. You can’t just look at the appearance (display effect), but also see if you will live a life (power saving and durable). Teach you the ultimate trick: let the manufacturer produce a​ ​Five-year cost estimate​​, count the electricity bill, maintenance bill, and upgrade bill. Some screens are cheap and expensive to buy, and the savings of the machine purchase fee is not enough to pay the electricity bill for two years! Remember, good screens will not be replaced for ten years, bad screens will be bad every year. You can taste them carefully...

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