07/03/2020
Our new model projector has full seal optical light engine,(CRE patented technology) to avoid dust problem. and also solve the cooling problem (built in 3 fans ). There will no disty even after you use 5 years.
Mostly of LCD/LED projector will have black spot on the screen after using some time, because some dust enter the lens. it is troublesome and high cost to clean the Dirty of inner lens.