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 move are hidden behind them​LED display​'s credit. 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? Let’s talk about something real today.

Three misunderstandings kill people

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 1.5mm.​, 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 to carry itAnti-condensing coatingModel. There is a hot pot restaurant that doesn’t believe in evil, so it changes the screen three times in half a year, and finally found that the condensate water soaked the circuit board.

Five tricks to tell you how good or bad

● ​​Touch the temperature by hand​: If the heat sink exceeds 60℃ after working for 1 hour, run
● ​​Looking at the screen slanted​: 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, it will be 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 vain

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" in it. Later I found out that the driver IC cut corners, and now they must bring it when they accept it.​Grayscale test chart​, Direct returns for incomplete display of 16th level.

Prices are foggy

Don’t be fooled by “direct sales from manufacturers”! A really powerful manufacturer,​Monthly production capacity is at least 5,000 square meters​​Start. 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.

Soul torture time

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. There is a website buyer who 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. There is a wedding company that is fun - renting the screen to others can make a difference, and you can earn the capital back in two years.

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

These parameters need to be engraved with smoke and lungs

• ​​Refresh rate ≥1920Hz​​(Lower than this, my eyes hurt after watching it for a long time)
• ​​Grayscale level ≥16bit​​(If the color transition is not silky, just look at it)
• ​​Dead light rate <0.0001%​(At most 10,000 lamp beads are not lit)
• ​​Protection level with X-type certification​​(Moisture-proof, dust-proof, naughty children)

When a property was delivered last year, the LED screen on the sand table was broadcasting and smoking, and the developer was surrounded by the owner for three days. Later I found out that I used a copycat power supply. Is this a painful lesson?

Say something that the industry cannot say

Now some manufacturers sell 2018 chip renovations as new models. Let's teach you a trick to identify them - let the sales manager log in in person​​Chip official website check batches​​, the production date does not match the report directly 12315. Another news: A real first-tier factory dares to write in a contract​"Double compensation for timeout delivery"​​, those who refuse to sign are absolutely terrible.

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?​​A 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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