Display certifications explained: CE, FCC, RoHS and CCC
What CE, FCC, RoHS and CCC actually cover, which one customs and tenders ask for, and how to check a certificate is real.
Read →Colour reports should ship with the wall, not on request
One green panel in a 24-panel wall started an argument a single delta E reading would have ended. Why the report now travels in the crate.
Read →A-grade and B-grade LCD panels: what the price difference actually hides
Two suppliers quote the same model number and a 22 percent gap. Before you assume one is cheating, look at what gets sorted out at the factory gate.
Read →What happens in the calibration room before a video wall ships
Three hours in a dark room with a colorimeter decides whether nine panels look like one image. Most buyers never see this step, and it is the step that decides the result.
Read →LED and LCD burn-in testing: what 72 hours at 45 degrees removes
Three days of full-brightness cycling before packing. In a hundred-unit batch it typically rejects two to four panels, and it is never shortened to 24 hours.
Read →LCD video wall crates for a 3,000 km road route: three versions, two failures
Thirty-six 55-inch panels from Shenzhen to Urumqi. The carton passed our drop test twice and still arrived with bent frames, because a truck is not a drop.
Read →Dead pixel policy: what to agree before you accept delivery
Every LED contract says something about dead pixels. Most of them are unenforceable. Here is the wording that actually protects both sides.
Read →Sea or air for an LED wall? Two shipments, one month apart, same destination
The same 28 square metre order went out twice: once by sea, once by air. The freight difference was smaller than the storage and delay difference.
Read →Importing LED screens: the paperwork question that delays more shipments than duty does
Duty rates are published. What actually stops a container at the port is usually a missing document or a wrong HS code. What to prepare before the vessel sails.
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