Are you often attracted by the large advertising screens in the mall that can "dance"? Or are you distracted at the concert staring at the flowing scene on the background of the stage? These dark technologies that make people unable to take their eyes open are hidden behind them.​ ​LED electronic display screen​​The credit for it. But the question is - there are quotes from thousands to hundreds of thousands on the market. How should ordinary novices choose to avoid losing the pit?

Three fatal misunderstandings

1. ​​"The higher the pixel, the better"​​
   The easiest pit for beginners to fall! Like those advertising screens in the mall that are 10 meters above the ground, there is no 4K resolution at all. ​ ​The screen with a pixel spacing of 3mm is not bad when standing 5 meters away and the effect of 1.5mm is not bad.​​, but the price can be twice as different. A restaurant owner spent money to install a small-pitch screen, but customers said, "I can see clearly without my phone."

2. ​​"The higher the brightness, the better"​​
   The indoor screen is 800cd/m² and bright enough. If you have to hit 4000cd/m², customers have to cover their eyes when they enter the door. Do you know? ​ ​For every 1000cd/m² increase in brightness, the electricity bill will be 300 yuan per month.​​, Isn’t it nice to save this money to give bonuses to employees?

3. ​​"Waterproof screen universal"​​
   IP65 protection sounds very intimidating, but it is still a waste of time to install it on the ceiling of a hot pot restaurant. Steam is more terrible than rain, you have to choose a belt​ ​Anti-condensing coating​​model. A hot pot restaurant chain changed the screen three times a year, and finally found that the condensate water soaked the circuit board.

Five tricks to inspect goods

● ​​Touch the temperature​​: If the heat sink exceeds 60℃ after working for 1 hour, run
● ​​Look at the picture slantedly​​: The color of the 45-degree angle remains unchanged, and if you have gray hair, pass as soon as possible
● ​​Play high-speed videos​​: Find a racing video test, please don’t consider if you have more than 3 frames of shadows
● ​​Knock the box​​: When knocked, the aluminum-magnesium alloy will make it brittle, and the iron box will sound dull and easily rust.
● ​​Check the warranty terms​​: Those who dare to protect for more than three years are truly confident, those who only protect for one year are in a state of ease

There was a shopping mall that suffered a secret loss. The screen I bought looked normal during the day, but after turning off the lights at night, there was a "ghost shadow". Later I found out that the driver IC cut corners, and now they must bring it when they accept it.​ ​Grayscale test chart​​, Direct return of 16th-level incomplete display.

Parameter comparison life and death line

Don’t be fooled by “direct sales from manufacturers”! A really powerful manufacturer,​ ​Monthly production capacity is at least 5,000 square meters​​Get started. Those who say they are in a factory but cannot produce the video of the workshop are probably wearing vests. I will teach you a ruthless trick - ask to read the original factory customs declaration form, and those who dare to commit fraud can have to be jailed.

Scene adaptation formula

• ​​Outdoor advertising screen​​: Brightness ≥5000cd/m² + IP65 protection + steel structure support
• ​​Stage floor tiles screen​​: Shockproof design + 1920Hz refresh rate + quick disassembly and assembly structure
• ​​Shopping mall window screen​​: Transmission rate ≥85% + matte surface + intelligent brightness adjustment
• ​​Sports fence screen​​: Shock-resistant shell + wide viewing angle display + remote cluster control

I used a music festival​​Radar sensing​​The floor tiles screen will shine brightly on the ground that singers have stepped on, and the on-site interaction rate will directly soar by 40%. This kind of black technology hidden in the details is real kung fu.

Soul-questioning session

Q: Is it IQ tax to buy cheap online?
A: The display is not a mobile phone.​ ​Installation and debugging are the highlights​​. The little money saved online may not be enough to pay for the engineer's travel expenses. A certain website bought a shop and installed it in a wrong way, but the money for repairing the screen is more expensive than that of the screen.

Q: Which one is worth renting or buying?
A: Choose to rent an event,​ ​Monthly rent = total price × 3%​​； Buy out directly if you use it for a long time. A wedding company can make a profit by renting screens to others, and it can earn the difference in price, and it can earn back the capital in two years.

Q: Is the special-shaped screen very expensive?
A: Arc and wavy shapes are indeed 30% more expensive, but​ ​Eye-attracting rate can be increased by 50%​​. A bar wrapped the DJ table into a cylindrical screen, and the sales of alcoholic beverages increased by 40% that month, which is worth spending!

Say some industry slander

Now some manufacturers sell 2018 chip refurbishment as new models. I will teach you a trick to identify them - let the sales manager log in in person​​Chip official website batch check​​, the production date does not match the report directly 12315. Another news: a real powerful manufacturer dares to write in the contract​ ​"Double the compensation for timeout delivery"​​Those who refuse to sign are absolutely terrible in their hearts.

Next time you encounter a salesperson who brags about "my screen will never break", do you ask him if he dares to sign a bet agreement? ​ ​Full refund will be made after repairs exceeding three times within three years​​, this trick can scare away 90% of the liars. Remember, buying LED screens is not buying cabbage. The money saved by greed for cheapness will sooner or later become a number on the repair order!

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