Many agree there are seven different colour LED light therapies to choose from, including red, blue, yellow, green, purple, cyan and white. That said, some say ‘white’ isn’t a colour (it’s a ...

But to create a white LED, red, blue and green light need to be combined. While the first two colors have been relatively easy to manufacture, researchers have struggled to produce a green LED.

Not only is white light a mixture of multiple wavelengths but, as previously discussed, it can be cooler or warmer depending on the balance among its red, green, and blue component wavelengths.

The three Japanese scientists who invented the first efficient blue LEDs in the mid 1990s have received the 2014 Nobel Prize for Physics. The invention of efficient blue LEDs was a foundational ...

Here we present ultra-thin, wearable colloidal quantum dot light-emitting diode arrays utilizing the intaglio transfer printing technique, which allows the alignment of red–green–blue pixels ...