▍Ask the truth first: Are you looking for gold thread or gold?

Oh, recently a friend asked me: "You all day long say that LED large screens are made of gold wires. Is this gold wire made of gold?" (laughs) To be honest, this misunderstanding is so big! Gold wire is indeed the core technology of the LED industry, but it is not a wire made of real money and silver. Let's make this clear today--​The so-called gold wire in the LED large screen is actually an alloy material with a purity of 99.99%, which is mainly used for the precision connection between the chip and the bracket​​. Just like a mobile phone chip needs a circuit board, the gold wire in the LED light bead is the "electronic porter".

▍Disassembly the LED large screen: Where is the golden wire hidden?

Let’s take apart the LED large screen, and the key points are three parts:

1. ​​Inside the lamp bead​​: Each rice-sized lamp bead has 1-3 gold wires hidden in it, which is responsible for guiding the current from the chip to the bracket.
2. ​Welding points​: The two ends of the gold wire are welded by ultrasonic wave, and the diameter of the solder joint is thinner than that of the hair
3. ​Encapsulated colloid​: Epoxy resin wraps gold wire to prevent oxidation and physical damage

To give a down-to-earth example - the role of gold wire in LED lamp beads is like chopsticks that burn tripe in hot pot. It not only needs to quickly conduct heat (current) but also to withstand high temperatures (working environment). Nowadays, high-end large screens are basically packaged with gold wire, especially those outdoor advertising screens. You won’t be dazzled if you stare at them for half an hour. It’s probably the result of the gold wire craftsmanship.

▍Gold wire VS copper wire: Is the extra money worth it?

Let’s use a barbecue stall to explain the technical differences:

Not to mention anything else, just look at the failure rate - the five-year repair rate of large screens using gold wire is less than 3%, while copper wire products may have problems in the first year. During the typhoon season a while ago, the outdoor large screen in a coastal city used gold thread technology to withstand the strong wind of level 12. The picture has never stopped. Is this money worth it?

▍Three tricks to teach you how to identify the real gold line

1. ​​Look at the solder joints​: Take a magnifying glass and look at the lamp beads. The gold wire soldering joints are like plump dewdrops, and the copper wire is like shriveled orange peel.
2. ​Measure brightness​: Adjust to the lowest brightness, the gold-wire screen can still see the details clearly, and the copper-wire screen has long been blurred into a mosaic
3. ​Touch the temperature​: Work continuously for 8 hours, the surface temperature of the gold wire screen shall not exceed 45℃, and the copper wire screen can fry eggs

Once I met a serious customer at the exhibition and took out the thermal imager to measure the temperature. As a result, the temperature distribution of the gold-line large screen was as uniform as a chessboard, and the bill was signed on the spot. So, good things can talk by themselves.

▍Three major development trends of gold wire technology

1. ​Ultra-fine gold thread​: From 1.0 micron diameter to 0.6 micron, equivalent to one percent of the thickness of the hair
2. ​​Intelligent welding​: Use AI to visually position the solder joints, and the yield rate soared from 95% to 99.99%
3. ​​Environmental recycling​: New electrolytic technology can recover 95% of gold wire material

There is a very interesting breakthrough in the industry recently - a technical team has made the gold wire into a spring structure, and its seismic resistance is directly doubled. This kind of screen is installed on a freight truck, and it can be displayed stably in bumpy road sections, and logistics companies are rushing to do so.

▍Tell the truth

Goldline technology is indeed a "cardiac surgery" for large LED screens, but the more expensive the better. The copper wire is enough for indoor screens in ordinary stores, but if you want to save face and have inner strength in government projects and high-end shopping malls, you still have to be sure of the gold wire craftsmanship. Just like buying a mobile phone, those who watch videos every day have to choose a flagship phone. The elderly phone that only calls is quite good, right?

Finally, I would like to remind you:​Don’t believe in those "all-in-one gold threads" tricks. A real good screen depends on the overall solution​​. Gold wire is just a basic skill, and the supporting heat dissipation design, control system, and installation technology are the key to winning. Next time I go to the screen, remember to bring a flashlight to shine the solder joint - real gold is not afraid of fire, good screen is not afraid of careful reading!

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