A TV picture tube (CRT) that had a flatter viewing surface than the traditional rounder tube. Up to 30% more glass was used to make the screen flatter. Also known as a "flat screen," "flat face ...

Can I Use Windex on a TV Screen? While it may be tempting to use Windex, don’t use it on flat screen televisions ... like the old tube kind, can be cleaned with Windex or similar products.