Through continuous optimization of core parameters such as pixels, brightness and contrast, combined with intelligent control and energy-saving design, LED large screen technology has achieved a leap from basic display to the perfect visual experience. The detailed analysis of key technologies is as follows:
1. Pixel Pitch: The Core Indicator Determining Clarity
Definition: Pixel Pitch refers to the distance between two adjacent pixel points, in millimeters (mm). The smaller the pitch, the higher the pixel density per unit area and the finer the image.
Example: A display with P1.25 (1.25mm pixel pitch) is suitable for close viewing (e.g., meeting rooms, control rooms), while screens with a pitch above P5 are mostly used for outdoor billboards viewed from a long distance.
Technological evolution: From the early P10, P8 to the current micro-pitch (Micro LED) below P1.0, the pixel density has increased by more than 100 times, driving LED screens into the 4K/8K ultra-high definition era.
2. Collaborative Optimization of Resolution and Screen Size
Resolution calculation: Resolution = screen width (number of pixels) × height (number of pixels), directly related to pixel pitch and physical screen size.
Example: A 5m wide and 2.8m high P2.5 display has a resolution of about 2000×1120, close to the 2K standard; the same size P1.25 screen can reach a resolution of 4000×2240, achieving 4K display.
Application scenarios: High resolution (e.g., 4K/8K) is suitable for fields with high detail requirements such as film and television production and medical imaging.
3. Brightness: A "Light Regulator" Adapting to Different Environments
Unit: Nits, 1 nit = 1 candela per square meter (cd/m²).
◦ Indoor screens: Brightness is usually 600-1200 nits to avoid visual fatigue caused by excessive brightness, and must have low-brightness high-gray technology (maintaining color layers at low brightness).
◦ Outdoor screens: Brightness needs to reach more than 4000-8000 nits to resist strong light interference; some high-end products adopt common cathode drive technology to reduce power consumption while improving brightness uniformity.
◦ Automatic adjustment: Real-time monitoring of ambient brightness through light sensors and dynamic adjustment of screen output for energy saving and eye protection.
