Do you always think that the size of the LED large screen is like Schrödinger's cat - you will never know the real size without unpacking it? Last week, I saw a guy from the advertising company measuring the diagonal line with a tape measure against the screen, but he also counted the border and made a big joke. Today, let’s take a look at the tricks that will not be explicitly stated in this industry!

1.​Common measurement misunderstanding rankings​​

​​Stop using the mobile phone distance measurement app!​​I skipped eight hundred times when I saw these pitfalls:

1. ​Diagonal Trap​：
   Measure the diagonal of the screen and divide it by 2.54? wrong!
   The actual display area of ​​the LED screen is 5-8cm smaller than that of the case
   ​​Correct way: disassemble the border to measure the lamp bead area​​

2. ​Model scheming​：
   Do you think P4 is a 4mm spacing? A big mistake!
   P4 actual point spacing = 4.8mm (industry general calculation method)
   Real size = number of modules × single module size

3. ​Power estimation deviation​：
   Someone calculates power consumption based on the screen area
   Actual power consumption = number of lamp beads × single power consumption (0.2W-0.5W)
   Take a look at a chestnut: 10㎡ P4 screen ≈ 120,000 lamp beads × 0.3W=36kW

II.​Professional review tips​​

​​Remember this mantra: "Three views, two calculations and one actual measurement"​​

1. ​​Look at module encoding​​：
   The sticker on the back of the box hides key information
   For example, NS-P4-320×160 means:

   • P4 point spacing (4.8mm)
   • Single module size 32cm×16cm

2. ​Calculate pixel density​：
   Pixel points per square meter = 1,000,000÷(point spacing mm²)
   P4 screen density = 1,000,000÷(4.8×4.8) = 43,402 points/㎡

3. ​​Actually measured grayscale calibration​：
   Use professional test maps to detect effective display areas
   Focus on whether there are dark areas in the surrounding borders (exceeding 2cm is an abnormality)

III.​Practical case analysis​

The fenced screen made for Tokyo Stadium last year is a typical example:

• ​Customer requirements​: Total length 38 meters, height 1.2 meters
• ​​Practical Plan​​：
  ① Single module size: 400mm×200mm
  ② Number of horizontal modules: 38m÷0.4m=95 groups
  ③ Number of vertical modules: 1.2m÷0.2m=6 groups
• ​Final size​：
  95×0.4m=38m (length)
  6×0.2m=1.2m (height)
  Tolerance is controlled within ±3mm

IV.Special tips for beginners​

​​Don't be fooled by the parameter table!​These three hidden details need to be checked:

1. ​​The proportion of heat dissipation zones​：
   The area of ​​the high-quality screen heat dissipation hole is ≥15% (the box temperature is ≤45℃)
2. ​​Spline seam accuracy​：
   The gap between adjacent modules is ≤0.5mm (A4 paper cannot be inserted)
3. ​​Brightness attenuation value​：
   Brightness attenuation should be ≤10% after 5000 hours of use

Editor's opinion

I have to say that many manufacturers now play sizes into numbers. The most outrageous case I have ever seen - a nominal 100-inch screen with an actual display area of ​​only 92 inches! So remember:​It is better to look at the number of lamp beads than to look at the size, and it is better to check the parameters than to check the uniformity of grayscale​​. The next time you purchase, you will bring a pixel density calculation formula, so that the suppliers will not dare to make random quotes!

for more product information and pricing, please contact us .