When I first entered the industry, I was squatting in the electronics market and looking at the LED modules full of cabinets, I was stunned - this thing costs from 80 to 800 yuan, and the sellers all said that they were "original and authentic". Later, I stepped on the pit three times, burned the control card, and encountered the wrong board, so I found out the trick here. Today I broke it apart and broke it, and told you how to avoid these thunders.

1. Three major cognitive misunderstandings in component procurement

Many people think that buying LED screen components is a price competition, but in fact, this is completely different from buying groceries. ​ ​First break three wrong concepts​​：

1. ​​"Light beads are expensive = good quality"​​: In fact, the driver IC and power supply are the key to life. The inferior power supply can make the lamp beads with a life of 50,000 hours in half a year.
2. ​​"High parameters = good effect"​​: Laboratory data may collapse directly outdoors with large temperature differences. We need to see the wide temperature test report from -20℃ to 60℃
3. ​​"Large quantity and many discounts"​​: Some dealers are playing tricks, and the first batch of A-grade products are used in the model, and large-scale products are mixed with B-grade products. What is the scam is that they don’t know what they know.

Last year, a peer suffered a huge loss, saving 150,000 yuan in purchase fees for the order of 2,000 square meters. As a result, it was found that the color temperature deviation exceeded 20% during installation, and the adjustment alone cost 280,000 yuan more. So,​ ​Saving small money may lose big money​​。

2. Core component purchase pit avoidance manual

Disassembly the LED screen to see the way, these five components directly determine success or failure:

​​Lamp beads​​: Don’t just look at the brand, you need to measure the attenuation curve. The brightness attenuation should be <5% after 3000 hours of normal use
​​Driver IC​​: 16bit is the bottom line, and the gradient grayscale diagram is used to test on site, and the goods are returned directly if there is a fault.
​​power supply​​: The load rate should not exceed 80%, for example, a maximum of 8A equipment is provided by a 10A power supply.
​​Box​​: 1.5mm aluminum-magnesium alloy is the foundation, and the magnet can quickly eliminate iron products
​​Control system​​: It must support HDR10+ dynamic mapping, otherwise the 4K film source will be seriously distorted

There is a wild way to detect: put the components in the refrigerator overnight and turn on the power. Only those that can be lit normally will be considered as passing the goods.

3. Where is the price and moisture hidden?

Why is the price difference between P2.5 indoor modules 3 times? Mainly stuck in these three links:

1. ​​Lamp bead packaging​​: Surface stickers (SMD) are 40% cheaper than COB, but have two levels of protection
2. ​​Heat dissipation design​​: Die-cast aluminum box is 25% more expensive than sheet metal, but the temperature can drop by 8-12℃
3. ​​Warranty Terms​​: If you dare to promise a 3-year warranty, you will undergo at least 72 hours of aging test before leaving the factory

Teach you how to calculate the calculation: Choose a driver module with IP65 protection. Although the unit price is 15% more expensive, the five-year maintenance cost can save 62%. Those merchants who say "breaking the package" often pass on the maintenance costs into logistics fees.

4. Procurement flow chart of smart people

After taking these six steps, Xiaobai becomes an expert:

1. Use the site size and viewing distance to calculate the minimum pixel spacing
2. Determine the protection level according to the usage time (period average > 8 hours to choose industrial grade)
3. The sample needs to undergo a 72-hour stress test
4. Check third-party EMC inspection reports
5. Sign the contract and indicate the warranty scope (especially power supply and control system)
6. In batches, the first order shall not exceed 30% of the total quantity

Remember to focus on two certifications: ISO9001 controls the production process, and RoHS certification eliminates harmful substances. Last year, 37% of inferior components fell on these two certificates.

5. Hidden formation killer ranking

These fees are the easiest to ignore for beginners:

1. ​​Revision fee​​: If the drawing error exceeds 0.5mm, the modification fee may be charged at 8% of the total price.
2. ​​Compatible debugging​​: Non-standard interfaces are equipped with existing equipment, and the debugging fee is as high as 2,000 yuan per day
3. ​​Storage loss​​: Spare parts inventory exceeds 6 months, the attenuation speed of lamp beads is 3 times faster

There is a cold knowledge: choosing components that support NDI transmission protocol can save 30% of the video processor cost. Now all 4K live streaming uses this, which is much more flexible than traditional HDMI cable solutions.

Recently, I discovered a new trend: buyers who know the knowledge start to ask for it​​Production batch report​​. For example, the lamp bead must be a product of the same evaporation cycle, and the color coordinate deviation shall not exceed 0.003. This trick can prevent the naked eye from appearing in the same screen - don't wait until it is installed before discovering the problem, as the labor cost for disassembly and modification will be more expensive than the components. Remember, it is really reliable to dare to let customers raid the factory suppliers at any time.

for more product information and pricing, please contact us .