BenQ Materials- PDLC Smart Opical Films application in shower. The PDLC Smart Film displays see-through and matte effects when powered on/off. Not only does this product protect your privacy, the electronically controlled conversion function is also highly cost-effective. With the advantages of heat insulation and UV insulation, coupled with low power consumption, the PDLC Smart Film can be used effectively in the home, office spaces, clinics, building windows.