Does the LED screen you just installed look like it has a mosaic? Do the edges of the text in the picture always look like burrs? Don’t rush to suspect that you have a broken hand, it’s probably because the points are not adjusted correctly! Last week, my neighbor Lao Wang bought the LED screen for 30,000 yuan. During debugging, he changed the 8K picture to pixel-style game quality, which made him so angry that he almost smashed the remote control...

1. What is a point? What's the use of adjusting it?

You may not believe it if you say it. Many novices start to adjust the "points" without even understanding what they are. ​ ​To put it bluntly, the points are how many LED light beads are stuffed in each square meter.​​. For example, the P3 screen has 1111111 lamp beads per square meter, while the P4 screen has only 62,500. The denser the lamp beads, the more delicate the picture is.

The three core functions of adjusting points:

1. ​​Eliminate screen jagging​​: Just like the "font smoothing" function of mobile phone screen
2. ​​Improve color transition​​: Make the gradient of the sunset no longer look like a sticker
3. ​​Extend screen life​​: Correct points can reduce the working temperature of the lamp bead by 15℃

There is a cold knowledge: what is actually adjusting when adjusting the points​​Compensation value for spacing of lamp beads​​. The most outrageous operation I have ever seen - someone has adjusted the spacing value from 2.5mm to 25mm, and the 8-meter-wide screen was displayed to an 80-meter effect...

2. Step-by-step teaching: bring out a perfect picture in five steps

Last week, I helped my friend adjust the bar stage screen and found a slutty operation: use the mobile phone camera as a debugging tool! How to play specifically? Let's watch and chat.

​​Preparation tool list:​​

• Laptop (install control software)
• Network cable (Six-class cables with shielding layer are recommended)
• Infrared rangefinder (can be used to install an AR rangefinder APP on your mobile phone)
• Solid color test pictures (four pictures of red/green/blue/white)

​​Practical steps:​​

1. Connect to the sending and receiving cards, remember to turn off the power supply first and then plug in the network cable
2. Open the control software and enter the physical spacing value in "Module Settings" (use the ruler to measure it the most accurately! )
3. Load the red test picture to observe whether the lamp beads have "color strings" phenomenon
4. Fine-tune the X/Y axis compensation value until the spots of adjacent beads are just tangent
5. After saving the parameters, use dynamic video to test the dragging situation

Key reminder: Many newbies are​​Module splicing error​​superior. For example, if the error of each piece is only 0.1mm, the overall error will become 2mm! At this time, you must enable "Error Compensation Mode" in the software.

3. Self-question and answer: You must know the three major pitfalls when adjusting the points

​​Q: Why is the picture even more confused after adjusting the points? ​ ​
Eighty percent of them encounter the "pseudo-high-definition" trap! Some control cards come with sharpening filters, remember to turn off all image enhancements during debugging. Last year, the main screen of a music festival was smoothed out the details of the singer's face because of this...

​​Q: What is the difference between outdoor screen and indoor screen adjustment? ​ ​
The difference is big! Outdoor screens should be adjusted​ ​Brightness compensation value​​. There is a formula that can be recorded: target brightness = ambient illuminance × 3. For example, when the noon sun is 100,000 lux, the screen brightness should be adjusted to 300,000 cd/m² (but don’t do this, it will be dazzling).

​​Q: Do you need professionals to adjust the points? ​ ​
Depend on the situation! The ordinary P4 screen is completely OK to adjust by yourself, but the curved screen used in stadiums should be used.​ ​Laser positioner + 3D modeling software​​. Last time I saw the master adjusting the ring screen of the stadium, there were 178 sets of compensation parameters alone!

4. These phenomena mean that it's time for you to adjust the points.

Don't hesitate when encountering the following situations, pick up the remote control and turn on the adjustment:

• When playing 4K videos, the character's hair looks like a steel wire ball
• The solid color image appears in "water ripples"-like color band
• The screen is more than 20% darker than the middle area
• The "Clone" effect appears in the fast moving subtitles

Let me tell you a real case: The transparent screen in a shopping mall atrium is always complained of like "ghosts". Later I found that the light refraction caused by transparent materials was not included in the point parameter. After adjustment, the transmittance rate directly soared from 75% to 86%, and the picture was instantly transparent.

The editor finally nagged: adjusting points is like putting a film on a mobile phone - it looks simple, but there are pitfalls everywhere in practice. It is recommended that novices practice from low-resolution screens first, remember​ ​Take original parameters photos before each debugging​​. If you really can’t handle it, don’t hold on. Now many manufacturers provide remote guidance services. It’s better to teach videos step by step than to do it yourself. Next time you see the screen image like an abstract painting, you will know where to start!

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