Tablets today, a laptop, smartphone and TFT LCD backlight mainly with gallium nitride (GaN) LEDs. GaN LEDs are incredibly energy efficient, but they have one major flaw: they produce a very light blue. With clever use of filters of phosphorus can be added more yellow to make the light look like "daylight", but the end result is a reduced range of colors and very muddy, which is only about a third of the range NTSC broadcast standard. There are other technologies that produce larger ranges, but at the expense of brightness - which is a no-no, as long as daylight readable displays compressed go.And then there Nanosys with his film Quantum Dot (Enhanced QDEF).
