Quantum Dots The Future of Television
LCDs are becoming obsolete as tech giants develop new OLED TVs that were supposed to blow LED displays out of the water. These displays were going to be brighter sharper and they were going to dominate the industry. But technology develops too fast and before OLEDs could hit the shelves that plan was derailed with the development of Quantum Dots.
If you go shopping for a television today, you will probably be hit with a bunch of new acronyms you have never heard before. Acronyms like QD, QUHD, SUHD, and ULED. The reason you have never heard of these before is because each of these represents a format of the newly developed Quantum Dot Technology.
Customers had their hearts set on OLED TVs because the technology was supposed to make TVs even thinner, but with Quantum dots, televisions can now be roll-able and applied like wallpaper. The thinnest technology yet!
A quantum dot is a tiny semiconductor that is only a few nanometers in diameter. Among its many uses, the quantum dot is used to convert short-wavelength light that is usually blue to any other color on the spectrum. The smaller the dot the shorter the wavelength and the bigger the dot the bigger the wavelength. Wavelength size determines the color that the dot will emit. The dots come in sizes that emit blue, red and green that are then used in combination resulting in billions of different color shades.
LCD TVs use backlights that shine through colored filters with a liquid crystal shutter that controls the amount of light. On the other hand, shining a backlight through a grid of Quantum Dots creates precise wavelengths that produce better and sharper pictures. Manufacturers use LED lights that produce blue light and shine them through quantum dots that are sized and coated to produce the colors red and green. As a result, this scheme is able to match television color specifications more precisely creating a display that is photo-enhanced.
Quantum Dots can also be used as an emissive display technology called Photo Emissive QD TV. Before we talked about coating the dots in colored film and shining the back-light through but with emissive display, the quantum dots become the subpixels. As a result of this, the dots will not need the film/filter. In this scheme manufacturers still, use LED lighting to emit blue light. Transparent Quantum Dots are used for the color blue and green and red subpixels absorb the energy from the blue light and in turn emit precise wavelengths of either red or green light, resulting in light that does not need to be filtered. This method emits light at 99% efficiency.
Manufacturers expect to start production on this technology in late 2018 with a goal of widespread distribution in 2019. Manufacturers had been working on different techniques to stabilize the Quantum Dots because in the past the only way to use them was if they were sealed inside glass tubes. They also had to find a way to increase their longevity so that these TVs would reach the average standard of 10 years of usage.
After photo-emissive QD TV’s hit the market we can then look forward to the next upgrade, electro-emissive QS TVs. In this system the Quantum Dots emit colors without the use of a backlight, making the display much more energy efficient. However, the availability of this technology is, unfortunately, years away.
A revolution is coming, a television revolution. We are a few years away from having our televisions as wallpaper in our homes and Quantum Dots will be the way that we get there.