A: This question has written a lot of introduction, You can search on the FELIX GLASS website and you will find related videos, introductions, and pictures. “Dead Fronteffect”(All-in-one-black), that is to say, the display is clearly visible when back-lit, and when non-backlit, the entire display including glass is completely black without a color difference. Dead front glass is widely used in smart homes, smart wearables, financials, medicals, and industrial control, etc.