IGZO, an indium gallium zinc oxide semiconductor, is used in TFTs (Thin Film Transistor) that control a supporting (but non-conducting) substrate such as glass. Oxide semiconductors are about 10 times faster in electron mobility than a-Si (amorphous silicon). Therefore, mobile devices equipped with IGZO displays come with batteries with a longer lifespan.
IGZO contributes to the dramatic leap in the energy efficiency of digital devices, resulting in substantially longer battery life for mobile users. When displaying still images, it achieves power savings of a staggering eighty to ninety percent* by pausing the driving signals to maintain the same image.
The report claims that we could see IGZO displays as soon as 2014 in the next iPad and MacBooks.
Read More via Patently Apple