It is generally accepted that current TVs are much better in terms of image quality, than those just a few years ago. Although the resolution remained largely unchanged, they began to offer lower response times, more natural colors and accurate rendering of black color.
Although many call flat TVs and thin ones as “plasma”, the truth is that most of us have at home LED back-lighted Tvs .
Plasma TVs, by far the best when it comes to image quality, disappeared almost completely, the industry being lately attracted by cheaper manufacturing technologies and more efficient in terms of energy consumption.
Trying to produce large OLED displays, proved to be very expensive, and today there are very few such models on the market, all at prices inaccessible to all users. These late couple of years, companies have started presenting diverse new technologies at CES that they will integrate on new generations of TVs, and terms like 4K and UHD, (Ultra HD) have already entered the vocabulary of any technology enthusiast.
Last year, however, they introduced a new term, which will probably will make more waves than 4k or UHD: quantum dot. It is a new TV panels lighting technology, which promises natural colors and better energy efficiency, which manages to be cheap to produce and implement.
What is quantum dot technology?
It is about Nano particles that have the ability to glow when illuminated. So, the Nano can be modeled in a pellicle which, placed behind an LCD panel, may act as a backlighting. Thus, the pixels on the display light up, and we can see images displayed normally. Basically, quantum-dot technology replaces LED backlighting, present on the market TVs. Depending on the quantum dot particle size, they may light in different colors. Since these can be constructed from previous established sizes, researchers have developed a pellicle made from Nano particles to illuminate in red and green.
Using a blue LED light, the entire screen is lit in white, unlike LED backlighting which was offering a yellowish tint. Thus, by using white light, the images displayed on the LCD are more natural, whereas the combination of yellow whites of the past, affected the color intensity and accuracy. The most important is that the three primary colors, red, green and blue are now displayed correctly and all their derivatives benefit from this. The best advantage of quantum-dot technology is that it can be integrated into displays of all kinds, not just in the new UHD TVs. We are talking about a technology so cheap that even the less expensive models will be able to integrate quantum-dot lighting.
Certainly, however, 4K and UHD displays will benefit more from natural colors. Since the display resolution is higher, there are more pixels which create the transition from one color to another, and it gives access to a greater range of colors. Even the black color rendering should be improved by quantum-dot technology, but we still do not completely get rid of problems.
Quantum Dot vs Oled ?
No matter how much it will help color rendering, the new technology is not yet as powerful as OLED technology. Then there will still be the effect of backlight leakage when the monitor displays a completely black image, since unlike OLED, individual pixels can’t be shut down. We are talking now about the limitations of LCD technology, and quantum dot can only help it perform better, not change the way it works.
The best part is that quantum dot TVs will be available during 2015, and the other manufacturers will launch the quantum dot models presented at CES 2015.