Apple Inc. has big plans to outfit its next iPhone with vibrant, energy-sipping organic LED displays, seeking to entice consumers with new technology that's already been embraced by other high-end smartphone makers.

The trouble is that the four main suppliers for such components won't have enough production capacity to make screens for all new iPhones next year, with constraints continuing into 2018, people familiar with the matter said, presenting a potential challenge to the Cupertino, California-based company.

OLED screens are more difficult to produce, putting Apple at the mercy of suppliers that are still working to manufacture the displays in mass quantities, the people said. The four largest producers are Samsung Display Co., LG Display Co., Sharp Corp., and Japan Display Inc.