The sixth generation iPhone, dubbed iPhone 5, will not feature the current LCD display, as Apple is reportedly working with Samsung to move to OLED. Samsung is increasing production of its OLED displays.

According to a source who spoke to The Korea Times, it's likely Apple could be using OLED displays for future iPhones.

"Thanks to the increased volume, chances have been raised to ship Samsung's OLEDs for Apple iPads and even iPhones," The Korea Times reported. Currently, Apple uses LCD displays in their iDevices.

Despite this, Apple is questioning Samsung's output rate and volume of OLED displays. As Samsung's biggest customer, a high output rate is critical for future devices, with Apple buying $7.8 billion worth of components last year. The company will spend more this year.

"This year, it will buy around $11 billion of Samsung parts despite the deepening legal battle between the two companies," The Korea Times add.

Samsung will bring in revenue of around 30 trillion won (approx. $26.4 billion) from its LCD and OLED businesses, making it the biggest display business in the world.

However, Samsung is switching its focus to OLED displays with LCD growth stalling.

"The global flat-screen industry is seeing a paradigm shift with makers spending on the rising and profitable OLED screens. Japan has an edge in patents and key technology, however, Samsung is ready to gain an initial lead by boosting its business volume," a senior hedge fund manager from a U.S.-based investment bank said to The Korea Times.

The Samsung Galaxy S2 and the Samsung Galaxy Nexus both have OLED screens.

Meanwhile, LG Display spokesman Gary Stone said the company will also be investing more in OLED displays this year, but didn't comment on Samsung and production of OLED screens.

According to previous rumors surrounding the next iPhone, the iPhone 5 will come with a curved edge-to-edge display. The device is rumoured to increase the screen size, at least to four inches.

The iPhone 5 rumors also suggest the device will come with the A6 processor, not the A5X in the new iPad. The news comes after Boy Genius Report revealed photos showing code which pointed towards an A6 processor, despite the new iPad launching with the A5X.

Ars Technica also reported that some devices are running iOS 6 already, ahead of a likely release alongside the iPhone 5 and a potential unveiling at the Worldwide Developers Conference in June.

(reported by Jonathan Charles, edited by Surojit Chatterjee)