Hey! Dear brothers who have just entered the industry, let’s talk about some hardcore things today—​Where is the little ancestor IC chip in the LED display that controls thousands of troops?​​ This thing is much more difficult than finding a partner! Last week, my apprentice removed the newly purchased display screen from eight pieces, but he couldn't find the IC, so anxious that he almost called the police! Don’t panic, let’s search the guy today and pull out this "heart"!

1. Don’t rush to demolish it first! What is IC?

​​People the science for Xiaobai​​: IC is an integrated circuit, which is equivalent to the "brain" of the display screen. It does three major things:

1. ​Command light beads​: Tell each pixel when and how bright it will be
2. ​Processing signals​: Translate the video signal into a language that can be understood by the lamp beads
3. ​Life-saving function​: If overheating, the brightness will automatically drop, the voltage will be unstable and the power will be cut off immediately

For example, the IC chips we have to control 38,000 lamp beads for the fence screen we made for the Tokyo Stadium - this workload is even busier than the Spring Festival dispatcher!

2. Four hiding places are raised

1. ​​"Little Black Block" on the Control Card​

Disassemble the back panel of the display screen and find the palm-sized control card with a sticker on it​Black squares the size of a fingernail​​ (Sometimes there is also a heat sink), this is the main control IC.
​​Why hide here?​​

• Close to the signal input port, reducing transmission loss
• Convenient heat dissipation (our outdoor screen ICs all have graphene thermal conductivity layer)

​​Practical skills​: Use your mobile phone flashlight to shine it diagonally, and the one with the brightest reflection is!

2. ​​The "Invisible Warrior" behind the light board​

How many LED modules are there on the back?​Sesame IC​, the professional name is "driver IC".
​Key role​：

• Transfer the command of the main control IC to each lamp bead
• Achieve a high refresh rate of 1920Hz (there will be a drag below this number)

​Industry cold knowledge​: Our dance floor tiles screens have 8 driver ICs hidden in each module, which can withstand 200 kilograms of man dancing!

3. ​​The "voltage stabilization master" in the power supply​​

The one on the power board​Long chips with many pins​​, it is the power management IC.
​Important functions​：

• Convert 220V voltage to 5V safe voltage
• Intelligent power adjustment (our screen saves 30% of power than ordinary products, rely on it)

​​Lessons of blood and tears​​: Some customers bought a counterfeit power supply with greed for cheapness, but the IC burned 18 modules!

4. ​​Receive the "signal translator" in the card​

There is also a long-distance transmission screen​Matchbox sized receiving card​​, there is a video processing IC hidden inside.
​​Special skills​：

• Cut 4K video into tofu cubes and distribute them to each module
• Comes with error correction (even if 10% of the data is lost, it can be displayed normally)

​​Real cases​: The arc screen we made for Singapore is supported by this IC!

3. Five tough tricks for experts to choose ICs

​1. Check the working temperature​

• Ordinary IC: -20℃~60℃
• Military-grade IC: -40℃~85℃ (standard for our outdoor screen series)

​​Test operation​: The tough guy is the one who can still work normally with a hot air gun!

​2. Number of pins​

• Low-end IC: 16 feet
• High-end IC: 48 or above (can control more lamp beads)

​Industry Secrets​: Our transparent screen IC has 64 feet, which is even more compact than centipede legs!

​3. Test the refresh rate​

• Strike the screen on the phone in slow motion, and black bars appear, which means that the refresh rate is not enough
• Real 1920Hz refresh rate (like our screen) is as smooth as silky

4. IC failure? These symptoms are revealed at a glance

1. ​"Ghosts"​
   Some areas have abnormal color → Drive IC pin desoldering
2. ​"Partial strike"​
   A module is completely black → Power management IC burned
3. ​"Blind the dog's eyes"​
   The entire screen flashes wildly → The main control IC program crashes

​​First aid tips​：

• Restart after half an hour off the power (give the IC cooling-off period)
• Use a thermal imager to find a hot IC (catch one by one)

5. Personal opinion: Don’t be fooled by “imported IC”!

Last year, a customer insisted on buying an IC from a foreign brand, but when he installed it, he found that it was incompatible with the lamp beads! Ask me to say:

• ​Match degree​Important than the brand (our IC and lamp beads are developed simultaneously, like gear chokes)
• ​​Heat dissipation design​​The key is better than the chip itself (no matter how good the IC is, it will be useless)
• ​​Antistatic capacity​It's the life gate (all workers in our workshop wear gold wire gloves to operate)

Alas, at the end, I'll tell you the truth: finding an IC is like playing hide-and-seek. Knowing where to hide is not a skill, the key is to understand how to work! Next time, when you see a problem with the screen, don’t rush to change the entire module - maybe you can get back to life by changing an IC!

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