Xiao Wang, who just opened a store, has been worried recently - the touch advertising screen that cost 80,000 yuan, and the customer has been knocking for a long time without any response, and he is like a piece of dead glass. This is like a novice buying a mobile phone. It’s useless to just look at the appearance, you have to be good at picking. Today, let’s talk about this LED touch screen that makes people love and hate, so that you can pay less tuition.

​​Three golden rules for screen selection​​

1. ​​The sensitivity must be wild enough​: The response speed of the serious capacitive touch screen is ≤8ms, which is the same as 0 delay when playing games. Don't light dot icons during testing, try to draw the word "Z" quickly. If the lines are intermittent, pass as soon as possible
2. ​​Don't mix light transmittance​: 86% transmittance is the bottom line, and the lighting of the store is accurate. There is a method: turn off the light and use a flash on the screen to illuminate the light, and the light spots emitted are even like moonlight
3. ​​The protection level is really good​: Starting with IP65, you can continue to use it by wiping it with a cup of milk tea. The lesson from a milk tea shop last year - choosing a fake IP54 screen, and the short circuit and smoke came out in the rainy season

​​Due to purchasing channels​
Online platforms seem cheap, but there are many tricks. Last month, Lao Li bought a 3-meter screen on Taobao. When he arrived, he found that it was a "mixed-race" sold by five factories. The control card and touch layer did not match at all. There are three reliable ways:

• Find direct-operated stores with ISO9001 and CCC certification
• Requires viewing videos for the same model for three months
• The contract must state "Acceptance and payment of the final payment"

Don’t be stupid in offline exhibition halls, bring a USB flash drive to store some 4K test films, and broadcast sports images live. If there is a smear or a color block, just turn your head and leave.

​​The twists and turns in the parameters​
Xiao Wang fell into the pit and didn't understand the parameter table. You have to look at these numbers with a magnifying glass:

1. ​Touch accuracy​: ≤±1.5mm is the passing line, it is best to choose a fingertip calibration function.
2. ​​Anti-light interference​: You have to see the picture clearly under ambient light of 3000 lux, which is equivalent to the brightness of the noon window
3. ​​Simultaneous contact number​​: The mall supports at least 20 touch points, and the store also needs to be 10 points.

There is a trick that only people in the industry understand - look at the distribution of heat dissipation holes. The honeycomb arrangement that is carefully employed by intensive phobia is the real material. Those who use strip heat dissipation for beauty will be overheated in summer.

​​Hidden test points for installation and maintenance​​
Do you think it's done after buying it? wrong! The installation team's craftsmanship can determine the screen life. Remember these three things:

• Do not connect to ordinary 220V circuits, weak power must be emitted separately
• Do not install it against the wall, leave at least 15cm of heat dissipation space
• Do not save anti-static coatings, especially in dry northern areas

Maintenance is even more of a knowledge. You have to use a special cleaner to wipe the screen every week, as ordinary alcohol will corrode the touch layer. There is a shopping mall that uses wet tissues to wipe it with a screen worth millions in half a year to make it a "big face".

Speaking of this, someone must have asked: Why don’t you buy an ordinary screen if you are so troublesome? Guess what? After the trendy brand store in Xinjiekou, Nanjing changed its touch screen, the customer stay time increased from 23 seconds to 4 minutes, and the sales increased by 1.8 times. If you play this thing well, it will be a treasure pot, and if you play it badly, it will be a gold-swallowing beast.

The last nagging sentence is heart-wrenching: Don’t believe those "lifetime warranty" nonsense, serious manufacturers are all three-year guaranteed core components. If you dare to write "touch layer protection for five years" in black and white, you must be sure to enter the game with your eyes closed. After all, I dared to make such a promise, and I would have gone bankrupt if I didn’t have any hard stuff in my stomach.

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