It appears LG has been able to resolve issues that plagued panels it supplied for Apple’s iPad 2 tablet, after the company resumed normal shipment levels in August following problems with its backlight units that resulted in Apple sourcing orders to its rivals.

Digitimes reports that shipments of Apple’s 9.7-inch iPad 2 panels went back to four million units in August, after dropping to 2.5 million units in July, with shipments expected to remain at a similar level in September.

In August, Apple reportedly suspended new orders for iPad 2 panels with LG Display and moved to rivals Samsung and Chimei Innolux after the display manufacturer’s shipments to Apple experienced quality issues. As a result, Samsung shipped nearly two million iPad 2 panel units in July, with CMI producing 450,000-500,000 units.

Both companies are expected to retain orders from Apple, with the company expected to reach 12 – 15 million iPad 2 shipments in the third-quarter of  2011. LG has reportedly reduced its utilisation rate following declining shipments of LCD TV and notebook panels.

Apple is currently embroiled in a number of lawsuits with Samsung in which it has accused the Korean electronics giant of copying its products. Whilst it relies on Samsung currently, it has been reported that Apple will shift suppliers as a result of lawsuits filed around the world.