Large Screen Industrial Grade Hi-Def LCDs Overview... Vartech's rugged line of industrial grade large screen LCDs is ideal for your digital signage or presentation needs. These units have bright active matrix TFT screens, wide viewing angles, 16:9 aspect ratio, high contrast ratios, fast response times and brightness levels ranging from 450 nits to 620 nits. VarTech's 37", 42", 47", '52", and 57" LCD have a native 1080p, 1920 x 1080 true high definition resolution and our other large LCDs have a WXGA, 1366 x 768 resolution also considered to be a high definition resolution.