Apple is reportedly planning to release a larger 12.9-inch iPad Pro, but not as soon as expected with delays expected to result in a September release.

According to sources of Bloomberg, described as familiar with Apple's plans, the company is making the larger iPad but has a reason for the delay.

Apple uses screen manufacturers to create its displays. This new, larger display, appears to have caused some issues that have resulted in delays from the likes of Sharp, LG and Japan Display.

Apple has seen a steady decline in iPad sales over the last year, part of this coinciding with the release of its larger iPhones. Creating a larger iPad may offer something the current 9.7-inch iPad and 7.9-inch iPad mini do not.

Bloomberg appears to suggest that Apple will be aiming the sales of its larger iPads at businesses too. These can, and do already, use iPads in the field as tools. Projections of these sales are expected to jump from 19 million in 2013 way up to 101 million in 2018. Looks like some bulk sales a business buyer could provide there then.

Previous rumours have suggested the iPad Pro could feature the OS X operating system, rather than iOS. This would deliver a more flexible platform for businesses so may still appear.

READ: Apple iPad Pro could feature Mac OS X operating system