English
LED display screens are widely used—from digital billboards and smart signs along highways to church signs, school signs, and LED signs for business in retail and advertising. Whether for billboards and advertising, led signage in conference rooms, or performance venues, their application is expanding, along with technical challenges.
Often, an LED screen may look perfectly installed and perform well initially. But upon closer inspection, subtle flaws emerge, and signal interference affecting display quality is a common issue.
For example, large LED screens or digital billboards might show wavy lines due to electrostatic interference. Sometimes, equally spaced vertical lines appear, often caused by impedance mismatch in the network cable.
In practice, reasons for interference in LED displays—whether for billboard signs, church sign sayings, or commercial led signage—include:
(1) Strong interference sources near the system.
(2) Poor quality or off-brand video network cables.
(3) Short or open circuits in the cable core wires.
(4) Mismatched characteristic impedance of the network cable.
(5) Spatial radiation interference introduced via cabling.
(6) Power supply system faults.
(1) Video cable quality issues: High resistance or out-of-spec impedance can cause signal loss. Try replacing the cable with a certified Category 5/6 cable.
(2) Strong nearby interference: Ground the cable conduit to shield against external interference—crucial for digital signs in busy areas.
(3) Cable core damage: Usually localized at connectors; inspect and secure each connection.
(4) Impedance mismatch: Use branded, high-grade network cables and compare performance.
(5) Radiation interference: During installation, assess the environment and avoid radiation sources. Keep network and power cables separated in independent conduits.
(6) Power supply problems: Use a clean power source or online UPS to filter superimposed noise.
Details matter in LED screen installation and performance. Whether considering the cost of billboard advertising, how much does billboard advertising cost, or selecting led signs for business, ensuring signal integrity helps avoid display issues—keeping your message clear, be it funny church signs, ads, or information displays.
