Reveal LED splicing screen installation must know the 7 golden rules
I. System planning before splicing
Professional-grade LED splicing project needs to be pre-completed site 3D modeling, using AutoCAD to draw load-bearing structure distribution diagram. It is recommended to reserve 20% redundant load to cope with unexpected situations, pay special attention to the splicing wall and the main body of the building resonance frequency matching. When calibrating the parameters, it is necessary to check the color temperature deviation value of each module (it is recommended to be controlled within ±150K), brightness consistency (the difference does not exceed 10%) and refresh rate synchronization error (≤5%).
Equipment Pretreatment Points
- 48 hours aging test: detect bad spots by alternating full white/full black images
- IP protection verification: at least IP43 for indoor splicing and IP65 for outdoor.
- Signal line impedance matching: double shielded coaxial line, length error <0.5m
II. Precision splicing process
In the mainstream splicing mode, the splicing precision of die-casting aluminum box can reach ±0.1mm, and the three-point positioning pin structure is adopted. Module straight splicing need to use laser locator assistance, splicing seam control recommendations: P2 below module ≤ 0.5mm, P3 above ≤ 1.2mm. curved splicing, the deflection angle of each module should be accurately calculated, usually using the chord height method for curvature verification.
Synchronized control system
Recommended master-slave cascade architecture, the master card with load capacity of no more than 36 receiver cards. When using PWM dimming technology, a uniform duty cycle parameter should be set, and it is recommended that the synchronization error be controlled within 1/4 frame period. Fiber optic transmission system should reserve 10% redundant bandwidth.
Three,Display Optimization
The color calibration session requires point-by-point measurements using a spectrophotometer to establish a 3D LUT color mapping table.Gamma value adjustment is recommended to be divided into three intervals: the low brightness zone (0-30%) to maintain linearity, the mid-range (30-70%) to do the S-type compensation, and the high brightness zone (70-100%) to implement dynamic compression.
Key Debugging Parameters
- Color gamut coverage: Rec.709 standard needs to reach 95% or above
- White balance deviation: ΔE≤3
- Dynamic response time: <8ms
IV. Operation and maintenance guarantee system
Temperature gradient monitoring system is established, and the temperature difference inside the box does not exceed 5℃. Monthly pixel compensation calibration is recommended, and re-gluing and sealing is required after 2000 hours of cumulative use. Power supply system adopts N+1 redundant configuration, each circuit load does not exceed 80% of the rated value.