OLED displays are in widespread use
Having fallen greatly in cost, organic light-emitting diodes (OLED) are now available in a wide range of devices. These use less power than traditional LCDs whilst allowing sharper, thinner, brighter displays. They also eliminate the need for back lights. Sunlight that would normally "wash out" a display has no effect – the screens appear the same even in broad daylight, or when tilted at an angle.
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