Does quantum dot technology enhance the dominance of LCD in the marketplace?
May 16, 2017 Sri Peruvemb
http://www.eet-china.com/news/article/201705160853
May 16, 2017 Sri Peruvemb
Quote:
Over the years, consumers are only familiar with an electronic display: that is, after the invention of the TV, has been used in the TV cathode ray tube (CRT). Although these displays were relatively heavy and clumsy, they were used since the 1990s and then transitioned to light and thin new displays such as liquid crystal displays (LCDs). In addition to the plasma has a short favor, the consumer is still more acceptable LCD TV, and the current LCD technology also accounted for 90% of the market.
Sri-PeruvembProf. Sri Peruvemb, Director and Director, International Display Association
That means that nothing is perfect - including LCD technology and organic light-emitting diodes (OLEDs) that replace LCDs over the past decade. Each technology has its advantages and disadvantages, the application of television and other display applications will have a certain impact. And then is the quantum dot - if you have not heard of it, I think you can hear soon.
The main drawback of LCD is in the color gamut, or is the image of the various colors of the display method. In the LCD display, light passes through many layers of material - transparent conductive coated glass, processing color filters, diffusers, polarizers, etc. - and is significantly reduced after passing through these layers. The light source can not handle the necessary color gamut, and it is even worse after passing through these layers. The industry has been researching this issue, and has been looking for ways to solve this problem, including changing the light from the fluorescent lamp to the LED (backlight). But also efforts to configure these LED backlight, in order to improve the quality of light emission.
Compared to LCD, OLED can provide higher color quality and saturation, but the production of large OLED substrate will increase the complexity of technology and technology, making it difficult to achieve high returns, but also cause expensive prices. Therefore, OLED is widely used in small products, and very few enterprises in the production of OLED TV.
So how to solve this problem? The answer is the quantum dot (QD). With these semiconductor nanocrystalline particles to enhance the LCD backlight, you can increase the visible spectrum of 30%. How is this done? LCD backlight light through the quantum dot conduction, resulting in more vivid colors, enhance the color gamut performance. The combination of LCD and quantum dots provides a rich color, quality and contrast similar to OLED, but the price is only a small part of it. Market researchers expect the global quantum dot market to grow by $ 1 billion a year from the beginning of the year.
There are several ways to make a quantum dot LCD, such as attaching a spot to a built-in material film, or placing a narrow tube containing a quantum dot in front of the LED backlight. Recently these two technologies have been used on a large scale for the production of QD-LCD. QD Vision (Lexington, Massachusetts) is the first to use quantum tube technology, and Nanosys (California Milpitas) is focused on quantum dot technology - both with some businesses on television and monitors Market cooperation. Industry giant Samsung, has abandoned the OLED TV, and the full use of QD - is the pursuit of the third method: directly in the backlight using quantum dots.
One drawback of QD technology is the use of heavy metals (such as cadmium) to create quantum dots. The use of these heavy metals around the world is also increasingly limited. Many companies, such as Quantum Materials Corp. and Nanoco, are looking for other quantum dots without heavy metals. Each TV requires only a few nanocrystal quantum dots - about one gram of material is enough - so the price will not be too expensive. In addition, quantum dots are also suitable for many other applications such as solar cells, solid state lighting, biotechnology and safety.
So, will the quantum dots replace the OLED? Do not think OLED will be completely out - because it still has advantages, including the ability to bend and use flexible, very suitable for small size products, such as wearable equipment and mobile phones. As mobile devices are increasingly used in the design of surface screens, and this design can be easily achieved through the glass LCD, so the technology in this area still has a strong position.
Quantum points, however, provide LCD with the opportunity to continue to use the market, such as signs, displays and televisions. Although the vivid color is very popular, but the final cost is the trump card of the consumer market, so the quantum point can make LCD manufacturers continue to occupy the high-end TV market, rather than let it flow to OLED. Future quantum dots can be combined with OLEDs to make products better! I expect the next few months, the quantum point will be part of your vocabulary, will appear in the global TV manufacturers brand.
It is due to the strong momentum of quantum development, it will also be May 21 - 26 "2017 show week" a hot topic of the General Assembly. There will be lectures and discussions on quantum dot and OLED technology, from businesses around the world and university experts to share their work in these areas and so on. If you want to know more, please come to Los Angeles this month to show the show week. We look forward to meeting you!
http://www.eet-china.com/news/article/201705160853
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