Nokia uses ClearBlack AMOLEDs for their smartphones. We believe this AMOLEDs will be produced from LG-Display.
Now Nokia explaine ClearBlack Display works:
To help explain how the display works, let’s talk about touch screens themselves. The touch screen on your phone is actually a layered pancake of different elements. The facet that makes ClearBlack Display so effective is where one of the layers, called the polarizer, is placed. The polarizer is a circular layer that is effective at removing undesired reflections. Stamping out reflections means higher visual contrast, resulting in vibrant colors and blacker blacks.
In ClearBlack Display phones, the polarizer is placed between the window and the touch sensor.
The goal of this layers is to stack the optical performance with an air-gap solution. By putting the polarizer between the touch and display, engineers can block reflection from the captive sensor grid. To envision this, tilt a traditional touch screen phone in direct sunlight…see the grid of tiny dots? That’s the capacitive sensor grid.
Finally, when placing the polarizer in this position, light is diffused and reflection is minimized, resulting in a clearer display where all icons and colors contrast against one another. To see an example of the difference between a ClearBlack Display device, see the image below. On the left, a Nokia C6-01 with the polarizer is in place and on the right, a prototype C6-01 without ClearBlack Display shows glare and reflection.