Apple is planning to start using its own custom displays in mobile devices as early as 2024, an effort to reduce its reliance on technology partners like Samsung and LG and bring more components in-house.

The company aims to begin by swapping out the display in the highest-end Apple Watches by the end of next year, according to people with knowledge of the matter. The screens upgrade the current OLED — organic light-emitting diode — standard to a technology called microLED, and Apple plans to eventually bring the displays to other devices, including the iPhone.

The changes are part of a sweeping effort to replace Apple supplies with homegrown parts, an undertaking that will give the company more control over the design and capabilities of its products. The tech giant has dropped Intel chips in its Mac computers in favor of in-house designs and plans to do the same with the key wireless components in its iPhones.