| 01 | Product Fit Application and Pixel Pitch | Indoor fine-pitch displays commonly use approximately P0.9–P2.5. Outdoor large-format screens commonly use approximately P3.9–P10. The correct pitch depends on viewing distance and content detail. | Pixel pitch directly affects viewing distance, image sharpness, LED module cost, cabinet size, and total project budget. | Pixel-pitch specification sheet, recommended viewing-distance chart, module drawings, and a project-specific sample. | Compare the proposed pitch with the actual minimum viewing distance, screen dimensions, camera distance, and content type. |
| 02 | Image Quality Brightness, Contrast, and Refresh Rate | Indoor displays are often specified around 600–1,500 nits, while outdoor displays commonly require about 4,500–8,000 nits. A refresh rate of 3,840 Hz or higher is frequently requested for broadcast and camera-facing applications. | Brightness supports daylight visibility, while refresh rate and scan design influence camera performance, flicker, and image consistency. | Measured brightness data, refresh-rate specification, contrast data, calibration report, and camera test video. | Request measurements from a complete cabinet or finished display rather than relying only on individual component specifications. |
| 03 | Reliability Ingress Protection and Environmental Resistance | IP65 is a common target for outdoor front-facing surfaces. Outdoor projects may also require corrosion-resistant structures, UV-resistant materials, operating-temperature data, and drainage design. | Weather exposure, dust, rain, humidity, salt air, and temperature changes can affect service life and maintenance costs. | IP test report, environmental test records, material specifications, cabinet sealing details, and operating-temperature range. | Confirm whether the stated IP rating applies to the assembled cabinet and screen surface, not only to a separate component. |
| 04 | Electrical Safety Certifications and Compliance | Typical international projects may require CE, EMC, RoHS, FCC, UKCA, or other market-specific compliance documentation. Requirements vary by destination country and installation type. | Correct compliance documentation supports customs clearance, site approval, electrical safety, and legal operation in the target market. | Valid certificates, test reports, declaration of conformity, power-supply approvals, and applicable local compliance documents. | Match the certificate model numbers with the actual LED cabinets, power supplies, control systems, and product configuration being quoted. |
| 05 | Project Economics Total Cost of Ownership | Compare purchase price together with power consumption, spare parts, shipping, installation, maintenance access, replacement modules, and expected operating hours. | The lowest initial quotation may create higher long-term costs through energy use, downtime, difficult maintenance, or expensive spare parts. | Itemized quotation, maximum and typical power consumption, freight assumptions, maintenance plan, spare-parts pricing, and warranty terms. | Build a five-year cost model using the same screen area, operating schedule, energy price, maintenance frequency, and replacement assumptions. |
| 06 | Manufacturing Control Quality Assurance and Consistency | Important controls include incoming component inspection, aging tests, cabinet-level testing, brightness and color calibration, pixel-defect inspection, and traceability. | Consistent color, brightness, mechanical dimensions, and module performance reduce visible seams and simplify future replacements. | Quality-control process, factory acceptance checklist, aging-test records, calibration reports, and batch traceability procedure. | Request a pre-shipment inspection using agreed acceptance criteria and photograph or record serial-number traceability. |
| 07 | Delivery Planning Lead Time and Supply Capacity | Standard projects may require several weeks for production after drawing approval and deposit. Customized structures, unusual cabinets, and large quantities generally require additional time. | Production delays can affect construction schedules, event openings, advertising revenue, and installation labor availability. | Production schedule, capacity statement, material-readiness plan, delivery milestones, packaging list, and escalation procedure. | Use a written milestone schedule covering engineering approval, sample approval, production, inspection, shipment, and site delivery. |
| 08 | Serviceability Maintenance Design and Spare Parts | Front-service or rear-service access should match the installation environment. Critical spare parts commonly include LED modules, receiving cards, power supplies, cables, and masks. | Easy access and compatible spare parts reduce downtime, maintenance labor, inventory risk, and the need to remove surrounding structures. | Maintenance-access drawings, spare-parts list, replacement procedure, service tools, receiving-card configuration files, and training plan. | Perform a practical module and power-supply replacement test using the proposed cabinet and installation method. |
| 09 | Warranty Support Warranty, Training, and Response | Commercial LED display warranties are commonly offered for approximately two to five years, subject to exclusions and operating conditions. Response times should be defined separately. | A written service commitment clarifies responsibility for defects, remote support, replacement parts, technician visits, and software assistance. | Warranty certificate, exclusions, response-time policy, support contacts, training materials, RMA process, and local-service arrangements. | Ask for a project-specific support workflow that states who pays for parts, labor, freight, customs, and on-site service. |
| 10 | Installation Integration Structure, Control System, and Software | The complete solution should define cabinet dimensions, weight, wind-load assumptions, power distribution, data routing, controller compatibility, content inputs, and monitoring functions. | A screen is a system rather than only a collection of LED modules. Integration errors can cause delays, unsafe loading, signal problems, or uneven performance. | Shop drawings, structural calculations, power-load schedule, signal-flow diagram, control-system list, software license terms, and commissioning plan. | Conduct a design review with the installer, structural engineer, electrician, content operator, and supplier before production begins. |