Incredible! Quantum-dot TVs can be even more powerful?
[PConline News] After this year's CES crazy show, I believe that the word "quantum dot" should be known in the brush screen. Samsung, LG, Hisense, Changhong, TCL... Basically, the new TV products that were exhibited at the CES 2015 show basically adopted quantum dot technology. Under the boost of many “big namesâ€, quantum dot technology has been instantiated in various ways, and even some media articles have said that quantum dot technology is a new television display technology that can spike OLEDs.
OK, now the problem has come. For ordinary consumers, for those who only have TV shopping needs, can you open the search engine and use simple-to-understand words to explain how quantum dot technology can use ordinary LCD TVs? What is the gamut increase? In the end, quantum dot technology is not a new technology. Is it worthwhile to spend a lot of money on purchasing related products? ... Let's take a look at the "quantum dots" on this tall, together with questions.
What is QD TV?
For articles on quantum dot display technology click on the image below
For the very esoteric technical convenience things are no longer explained. Interested friends can click on the map to see the articles written by our colleagues. Because this article is a conceptual popular article, the main part of the current quantum dot TV, that is, it can be part of the "quantum dot," is actually a "film."
As we all know, after the manufacturers no longer use the RGB-LED backlight module for cost reasons, the backlights of the LCD TVs we now see are basically solid-color W-LED backlights. The light LED accounts for most of the time. . Light is emitted, filtered through a filter, and filtered out in RGB 3 colors. This is a very general principle of LCD imaging. However, this kind of solid light has a bad place, that is, color cast. The colors that come out eventually have various kinds of deviations and deficiencies. With the words we often hear, there is chromatic aberration and color gamut. Narrower. Before QDs, manufacturers have been trying to improve this kind of chromatic aberration and color gamut by adopting more sophisticated backlight control. What we are using here is the local control we often see on high-end TVs. Light technology, but because there is no fundamental improvement to the imaging components, the effectiveness is still relatively limited.
This is because the light is not pure and causes the last color difference
Then the quantum dot technology appeared just like this. The purpose was to change the color of this impure color. From the production situation, the manufacturer used a chemical film full of quantum dots to replace the original image module and backlight. Color filter between the plates. In order to produce better light that meets the requirements.
Therefore, the author said in front of it that for now, the so-called "quantum dot" is actually a chemical film that is toned. The "film" used by Quantum-dot TVs launched by different manufacturers will also be different. This is the reason that even if they are Quantum-dot TVs, the products still have color differences. For now, the three major manufacturers of quantum dot film on the market: the technology of American QD Vision has been adopted by companies such as Samsung and TCL. The technology of American 3M and Nanosys has been adopted by Amazon.com. The Dow Chemical technology, which uses cadmium-free technology as its selling point, is the technical partner of LG Quantum TV.
Why are manufacturers interested in quantum dots in so many technologies?
As a manufacturer, of course, the primary purpose is to pursue the maximization of profits. How can I maximize it? Reducing costs and expanding sales is a very good method. So why are manufacturers using quantum dot technology in so many new technologies? The advantages of quantum dots mainly include the following aspects:
First, the low cost, TV manufacturers do not need to make substantial adjustments to the current LCD TV, quantum dot technology can be applied to new products;
Second, hardware costs are low. Compared to OLED TVs in another era, the cost of LCD TVs based on quantum dot TVs is less than 1/2 that of OLED TVs of the same size;
Third, maintenance costs are low, and the life of quantum dot TV screens is longer. Thanks to excellent power consumption control, the overall power consumption of the device is better controlled, which makes the screen life of quantum dot TVs more than 20,000 hours longer than OLED TVs. .
TCL QD TV Instrument Test Gamut Range
With regard to the advantages of the above three aspects, quantum dot technology is applied to its own new products. It not only satisfies the need to increase product color gamut to attract consumers, but also can prevent production costs from growing too much, and it also reduces future predictable warranty. During the period of maintenance costs, so many things, you say manufacturers have any reason not to get together?
Does it mean that for consumers who have buying needs, is it necessary to buy at least 20% of the price of a quantum dot TV than an ordinary wide-gamut LCD TV?
From the author's point of view, this topic requires the consumer to do some classification. For the most demanding consumers with the most demanding budgets, don't say anything, oled, quantum dot, etc. Buy it yourself, but the only thing that needs to be reminded is that for large-sized TVs, the unit size OLED Still more expensive than Quantum TV.
New technology, new products, prices must also be high
For the average consumer who pursues cost-effectiveness, it is recommended that you don’t waste your money. New technologies and new products must be lowered after the large-scale listing.
ONE MORE...
After the launch of QD TV, it has been featured in wide color gamut, low power consumption, etc. However, in fact, TVs adopting quantum dot technology are not the best because currently, QDTV is only in the form of light. The quantum dot chemical film is used for the color conversion, and the source of the light source still has a physical flaw such as uneven color. In fact, Quantum TV products that can fight with OLED will inevitably continue to improve. What form will it be? We can get some answers from the latest news.
Chinese scientists design new quantum dot light emitting diodes
In this study by the Zhejiang University Task Force, scientists designed a new type of high-performance quantum dot light-emitting diode (QLED), and will use the lifetime under bright conditions to advance to a practical level of 100,000 hours, which means this The new device is expected to become a strong contender for next-generation display and lighting technologies. “We have already seen the first quantum dot application with disruptive significance, which is the 'QD LED' with excellent performance,†said Peng Xiaogang, head of the research team and professor at the Zhejiang University High-tech Materials Chemistry Center.
In the end, the final form of quantum dot TVs should be quantum dot lighting, which means that quantum dots emitting diodes with extremely high purity are used as backlights at the source. If Quantum Dot LEDs can really be applied to televisions in the future, then Quantum TVs will really move toward perfection: the same self-illumination as OLEDs, but purer than the light emitted by OLEDs.
Summary: As a relatively new technology, QD TV is very obvious for the improvement of TV color gamut. Compared with ordinary LCD TVs, the cost difference is not large, but there are topics, there is a gimmick, so in In the next few years, I believe that TVs using quantum dot technology will slowly replace traditional LCD TVs, and will develop from the mere adoption of Quantum Dot films to the adoption of Quantum Dot LEDs. When the OLED VS QLED battle really started...
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