| 1. Pixel Pitch | Approximately 2.5 mm to 6 mm for many indoor perimeter installations | A smaller pixel pitch generally provides sharper images at close viewing distances, while a larger pitch can reduce the initial display cost. | Request the exact pixel pitch, LED package type, pixel density, and recommended minimum viewing distance. |
| 2. Brightness | Often about 800 to 1,500 nits for controlled indoor environments | Brightness must be high enough for clear content but not so high that it causes glare or discomfort in an indoor venue. | Confirm measured brightness, brightness-control range, calibration method, and whether automatic light sensing is available. |
| 3. Refresh Rate | Commonly 1,920 Hz or higher; higher rates may be selected for broadcast or camera use | A higher refresh rate helps reduce flicker and scanning artifacts when the screen is recorded by television or event cameras. | Check the tested refresh rate under the intended resolution and whether the supplier provides camera-test results. |
| 4. Viewing Angle | Typically around 140° horizontal or more, depending on LED design | Wide viewing angles help spectators and visitors see consistent colors and brightness from different positions. | Ask for horizontal and vertical viewing-angle data and confirm color consistency at oblique angles. |
| 5. Cabinet Structure | Lightweight modular cabinets with tool-accessible front or rear maintenance | Modular construction supports faster installation, replacement, transport, and servicing along long perimeter runs. | Verify cabinet dimensions, weight, alignment tolerance, maintenance direction, locking system, and spare-module compatibility. |
| 6. Protective Padding | Soft edge protection or padded perimeter structures for sports and public-event applications | Padding can help reduce the risk of injury and protect LED modules from accidental contact, especially near playing areas. | Confirm padding materials, impact-resistance test information, edge design, replacement process, and venue-safety documentation. |
| 7. Viewing and Content Management | Support for common video inputs, scheduled playback, image scaling, and synchronized content | Reliable control features allow operators to display advertisements, scores, announcements, logos, and live video efficiently. | Check controller compatibility, input formats, content software, network options, offline operation, and user permissions. |
| 8. Color and Brightness Calibration | Factory calibration with field-adjustable brightness and color parameters | Calibration improves uniformity between cabinets and helps maintain consistent appearance across a long display installation. | Request uniformity specifications, calibration reports, replacement-module calibration procedures, and long-term data backup options. |
| 9. Reliability and Serviceability | Replaceable modules, redundant power options where required, and documented operating limits | Easy maintenance can reduce downtime and operating costs when a module, receiving card, or power supply needs replacement. | Review warranty terms, mean-time claims, spare-parts availability, fault monitoring, service response time, and installation training. |
| 10. Safety, Compliance, and Total Cost | Applicable electrical, electromagnetic-compatibility, fire-safety, and venue-installation documentation | Compliance and lifecycle cost are essential because purchase price alone does not reflect installation, energy, maintenance, and replacement expenses. | Request test reports relevant to the destination market, power-consumption data, structural requirements, installation cost, and five-year ownership estimate. |