Apple for its 20th anniversary iPhone will adopt a Samsung-made OLED technology called COE (Color Filter on Encapsulation) to make the display brighter and thinner than previous panels, reports ETNews.

In a traditional OLED panel, a polarizing film sits above the display to cut reflections and improve contrast. The drawback is that this film also absorbs some of the OLED’s own light, reducing brightness and efficiency. With COE, Apple would remove the polarizer entirely and instead apply the color…