Did you just take over the store decoration, and the boss just told you "find a three-color advertising screen" and nothing happened? Or when you swipe a certain product and see the same size screens for 2888 yuan and 28888 yuan, just choose the difficulty? Don’t panic, today we will transform into humanoid navigators and guide you step by step to find reliable purchasing channels – after reading this article, we will save you three years of detours!

When I first entered the industry, I helped a chain drug store purchase three-color screens, and I chose a small workshop because it was cheap. As a result, it rained the day after installation, and the screen transformed directly into a "tears display" with red lamp beads flowing downwards along with the rain. Later I found out,​ ​The waterproof level must be at least IP54.​ ​, outdoor use requires UV protection coating. Now let me chat with you about the experience gained from pitfalls over the years.

1. Big PK of online and offline channels

​​Physical store pie​ ​ VS ​ ​Online shopping party​ ​, which one is stronger?

• ​​Electronic market physical store​ ​Advantages: You can see the effect on the spot, such as testing whether the grayscale gradient is broken.
  Fatal injury: Quotes are generally 30% inflated, and you have to handle logistics and installation yourself.
• ​​E-commerce platform​ ​Advantages: No reason to return or exchange within seven days, partial package installation
  Hidden minefield: The parameters on the details page are seriously falsified, and the measured brightness may only be 60% of the nominal value.

There is a trick: first go to 1688 to ask for a quotation from the source factory, and then go to the physical store to bargain. Last year, I helped the gym purchase and saved more than 4,000 yuan using this method, and also got an extra two years of warranty.

Two or three tricks to find out the good stuff

1. ​​Three things you must check when opening the box​​

   • Does the control card have CE certification mark?
   • Power cord cross-section ≥1.5mm² (below this number is prone to overheating)
   • Module splicing seam ≤0.5mm (insert a bank card without jamming)

2. ​​Field test artifact​​
   Download a flicker detection APP on your mobile phone and shoot videos against the screen. If a black raceway appears, it means​ ​Refresh rate is less than 1000Hz​ ​, my eyes will be sore after using this kind of screen for a long time.

3. ​​Brute force testing tips​​
   Splash water to see the waterproof performance (remember to turn off the power first! ), use the key to scratch the panel to see the scratch-resistant layer. The most ruthless purchasing manager I have ever seen directly went to the angle grinder to draw the border - saying that he wanted to measure the thickness of the oxide layer.

3. What’s the trick with the price difference?

Why do some merchants dare to quote three times the price difference for a three-color screen of the same size? The secret is all in these details:

• ​​Lamp life​ ​: The light decay of A-type lamp beads is ≤10% after 50,000 hours, while the B-type lamp beads will turn yellow after 20,000 hours.
• ​​control system​ ​: The one with intelligent light sensing system is 800-1500 yuan more expensive, but saves 30% of electricity.
• ​​Warranty terms​ ​: The cost of a five-year warranty is 20% higher than a one-year warranty, but the failure rate is 70% lower

Let’s take a real case: A shopping mall bought a low-priced screen at a cheap price, but ended up replacing the module twice in three years. The total cost was 12,000 more than buying a high-end screen. This is called "buy cheap, use expensive"!

4. Guide to avoid pitfalls by asking and answering questions for yourself

​​Q: How to identify refurbished screens? ​ ​
Look at the screw holes! The edges of the screw holes of the new screen are smooth and scratch-free, while the refurbished screen will have burrs from secondary processing. Another trick is to smell it. New circuit boards have a pine smell, while refurbished ones have a pungent smell of soldering oil.

​​Q: Will I get ripped off if I customize the size? ​ ​
Remember this formula:​ ​Total price = standard screen price + (customized area – standard area) × 1.2 times unit price​ ​. If the quotation exceeds this ratio, decisively change suppliers.

​​Q: How to inspect the screen when buying it online? ​ ​
Focus on the unboxing video! Video recording of the entire process from express delivery packaging to power-on test. One time, the corner of the screen I received was dented, and the logistics company paid the full price based on video evidence.

Buying a three-color screen is like looking for a partner - you can't just look at the bright appearance, you have to find out the details. The next time you purchase, don’t rush to place an order. Ask the supplier for a test report first and focus on it.​ ​Light attenuation coefficient​ ​and​ ​Color deviation value​ ​. If you encounter someone who is hesitant and refuses to show you, there is probably something wrong with you. Remember, a good screen dares to show you the data, but a bad screen only plays word games with you!

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