LG Display has started mass production of a new and thinner display, which is widely speculated to be for use in Apple's next iPhone.

"We just began mass production and we don't expect any disruption in supplies," Han Sang-beom, chief executive of LG Display, a panel supplier for Apple products, told reporters late on Wednesday, according to Reuters.

Apple is planning a major product launch on September 12, in which the company is expected to announce the sale of its new iPhone.

The next iPhone will most probably have a larger and thinner screen after Samsung unveiled its latest Galaxy smartphone with a 4.8-inch touch-screen.

Sharp also said earlier this month it would start shipping screens destined for a new iPhone in August.