Quantum Dots

If you observed light emitted by quantum-dot with a spectrometer, you would observe a steep sharp and narrow emission peak, this is because pure red and pure green light, which travels with the blue light through the polarizers, liquid crystals, and color filters due to that colored light, quantum dots have an advantage over traditional LCD TVs when it comes to vivid hues, textures, color gamut and color reproduction. In a normal LCD, white light produced by the LEDs has a wider spectrum. It's a sort of dirty as it is primitive and consumes more energy, with a lot of light falling in a color range unusable by the sets color filters. A filter is a very lossy thing, says Nanosys President and CEO Jason Hartlove. Nanosys makes film-based quantum-dot systems for several products. When you purify the color using a color filter, then you will get practically no transmission through the filter. The purer the color you start with, the more relaxed the filter function can be. That translates directly to efficiency. So with a quantum-dot set, there is very little wasted light. You can get brighter, more-saturated, and more-accurate colors. The sets were displayed at CES 2015 that certainly looked punchier than your average LCD.

Quantum dots are tiny, and their size determines their color. There are two sizes of dots in these TVs. The big ones glow red, and they have a diameter of about 50 atoms. The smaller ones, which glow green, have a diameter of about 30 atoms. There are billions of them in a quantum-dot TV.