Apple will reportedly introduce an all-new industrial design in 2017, when the company is rumored to launch an OLED iPhone. There’s already evidence that the company is making huge orders to prepare for those displays.

Bloomberg said Monday that one firm named Applied Materials “reported an almost fourfold leap in orders for equipment to make displays” that will be used in the new iPhones. Applied Materials doesn’t make the panels, instead, those are likely to come from either LG or Samsung. Apple has reportedly already ordered 100 million such panels.

There are plenty of benefits to switching to OLED panels; as Bloomberg notes, they’re thinner, which would help Apple create an even skinnier iPhone. They can also help extend battery life since they can be more power efficient, consuming less battery while the display is on.

Apple’s iPhone 7, iPhone 7 Plus and iPhone 7 Pro, all expected this September, probably won’t use the new OLED panels. Instead, we’ll need to wait until September 2017 to see what those iPhones offer.