1. Comparison of differences in core luminescence principles

​​Question: What is the essential difference between LED and LCD screens in basic working principles? ​ ​
​​answer:​​

• ​​LED display​ ​Adopt a self-light diode array, each pixel is directly illuminated by a red, green and blue three-color LED chip.
• ​​LCD display​ ​Rely on backlight module (CCFL or LED backlight) + liquid crystal molecules to control light passing through

​​Comparison of key parameters:​​

2. Method for identifying physical structure characteristics

​​Question: How to quickly identify the display device type through appearance structure? ​ ​
​​answer:​​

1. ​​Thickness observation method​​

   • The thickness of the LED screen module is usually ≤50mm (including heat dissipation structure)
   • LCD screen includes backlight module thickness ≥80mm

2. ​​Splicing seam judgment​​

   • High-quality LED screen implementation​ ​<0.1mm seamless splicing​​
   • The LCD splicing wall has a physical border of ≥3.5mm

3. ​​Surface touch test​​

   • LED display unit is equipped​ ​IP65 protection level​ ​Hard surface
   • LCD screens are mostly glass substrates + polarized film soft touch

3. Dynamic display performance verification

​​Question: How to effectively distinguish display technology in dynamic picture scenes? ​ ​
​​answer:​​

• ​​High-speed motion picture test​​

  • LED screen​ ​≥1920Hz refresh rate​ ​Ensure that the racing track is free of shadows
  • LCD screens generally produce motion blur with refresh rate of ≤240Hz

• ​​Grayscale transition verification​​

  • ​​Low bright high gray technology​ ​Make the LED still have a 16-bit color depth at 800cd/m² brightness
  • The grayscale loss of LCD at low brightness reaches 30%

• ​​Ambient light adaptability​​

  • LED screen support​ ​10000:1 ambient light contrast​ ​adjust
  • The brightness attenuation of LCD screen due to ambient light interference is 60%

4. Professional scenario application verification

​​Question: How to choose matching display technology in a specific usage environment? ​ ​
​​answer:​​

• ​​Outdoor advertising scene​​
  LED screens available​ ​7500cd/m² peak brightness​ ​, maintain visibility under direct sunlight, LCD screen completely fails at 2000 lux illumination

• ​​Creative interaction scenarios​​
  LED floor tile screen support​ ​200kg/m² load-bearing design​ ​, LCD structure cannot achieve pedaling interaction

• ​​Sports venue scene​​
  LED fence screen achieves​ ​C40 concrete grade seismic resistance standard​ ​, LCD splicing structure has a risk of high-frequency vibration failure

Today, with the rapid iteration of digital display technology, users need to choose based on application scenarios, budget costs and maintenance needs. For the need​ ​High brightness environment adaptation​​、​​Flexible splicing shape​ ​and​ ​Extra-long service life​ ​LED display technology has shown irreplaceable advantages, especially in the fields of smart city construction and commercial vision upgrade, its technical characteristics are highly consistent with market demand.

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