The recent hot World Cup events have caused the hearts of fans in front of TV to fluctuate. For many fans who can't watch the game, it is essential to choose a clear, colorful TV screen. With its leading edge in color quality, QLED Quantum Dot TV is gradually becoming known to consumers, and its market share is steadily rising.
QLED Quantum Dot TV can stand on the high-end market with its unique magic weapon - Quantum Dot. Quantum dots are solution semiconductor nanocrystals ranging in size from 2 nanometers to 8 nanometers. The photoelectric properties of quantum dots are unique. They are stimulated by electricity or light and emit very pure high-quality monochromatic light of various colors according to the diameter of the quantum dots. The application of quantum dots to display technology enables the use of quantum dots to emit high-quality red/green monochromatic light with concentrated spectrum and very pure color for better imaging color. Peng Xiaogang, a professor at Zhejiang University and a senior expert in quantum dots, once said that quantum dots are probably the best luminescent materials ever discovered by humans.
According to reports, the global quantum dot (QD) market is expected to grow from $2.57 billion in 2018 to $8.77 billion in 2023, with a compound annual growth rate (CAGR) of 26.97 between 2018 and 2023. %. The main factors driving market growth include the growth in demand for quantum dot technology for high-quality display devices and the growing demand for many applications due to its miniaturization characteristics. It can be seen that the momentum of quantum dot display technology will become stronger in the future.
Modern quantum dot technology dates back to the mid-1970s, and it was developed to solve the global energy crisis. Through photoelectrochemical research, a bonding surface between a semiconductor and a liquid is developed to utilize the excellent ratio of body to surface area of ​​the nanocrystalline particles to generate energy. The initial research began with scientists from two laboratories in the early 1980s: Dr. Louis Brus of Bell Labs and Alexander Efros and Victor of the former Soviet Yoffe Institute. I. Dr. Klimov. Dr. Brus and colleagues found that different sizes of CdSe particles produce different colors. This work is helpful for understanding the quantum confinement effect, which explains the relationship between quantum dot size and color, and also paves the way for the application of quantum dots.
Since 1997, with the continuous improvement of quantum dot preparation technology, quantum dots are more and more likely to be applied to biological research. In 1998, two research groups, Alivisatos and Nie, published a paper on quantum dots as a bioprobe in Science. For the first time, quantum dots were used as bioluminescent markers and applied to living cell systems. They solved how to dissolve quantum dots. The aqueous solution, and how the quantum dots are coupled to the biomacromolecules through the reactive groups on the surface, has ignited a research boom in quantum dots.
Breaking the horizon and innovating the future
Quantum dot display technology is mainly divided into two stages of photoluminescence and electroluminescence. At present, TCL, Hisense, South Korea and Samsung have realized the landing of photoluminescence products. Based on the first stage of photoluminescence, its performance has been superior to existing TVs, achieving breakthroughs in terms of color, power consumption and overall effect.
Professor Xu Zheng of Beijing Jiaotong University said that one of the biggest features of quantum dots is that the full width at half maximum of the luminosity curve makes it easy to achieve a relatively high color gamut, while other materials have a wide half-height width and color gamut is difficult to perform. The extent to which quantum dots are reached. In addition, quantum dots are highly efficient, all of which make it easier to implement than other materials when it is used as an electronic light-emitting device. Therefore, QLED quantum dot TV color gamut coverage can reach 157% (BT709), compared with ordinary LCD TVs increased by 58.3%, compared with OLED increased by 37.9%, achieving 1.07 billion color performance. In addition, since the quantum dots are inorganic crystals, the stability is also very high, which is difficult to match with other materials, and there is no need to worry about the service life. Therefore, QLED quantum dot TV has the three advantages of "high color gamut, pure chroma, and long color".
At present, there is always a dispute between QLED and OLED in the industry. However, from the display materials of its application, the answer is naturally derived.
OLED application is organic material, easy to oxidize, resulting in short life, easy to burn screen residual image and other problems that cannot be coordinated at present; the insufficiency of OLED in color gamut is also determined by the intrinsic luminescence peak width of organic luminescent material. At present, OLED TVs on the market are mass-produced by the method of preparing white OLEDs, instead of active illumination of the three primary colors, there are problems such as reduced color, increased energy consumption, and high prices.
With the continuous advancement of quantum dot display technology, the quantum dot electroluminescence that enters the second stage in the future will undergo tremendous changes in the entire industry. Quantum dot electroluminescence will be able to self-illuminate like an OLED, without the need for a backlight, and to achieve flexible display, ultra-thin shape, but there is no defect in the future of OLED. In the future, through quantum dot electroluminescence, the display can be made like a newspaper, so that clothes, curtains and other media become televisions, and the development space is unimaginable.
China clings to the next generation of display technology
TCL is the first company in China to launch QLED quantum dot TV, so it has an absolute voice in this advanced display technology. Since the launch of the first H9700 with quantum dot technology in 2014, it has been deeply cultivated here. At present, it has formed a huge quantum dot TV camp including X1, X2, X3, X5, X6 private theater, Q960C and so on. In addition, TCL QLED Quantum Dot TV has also won major domestic and international awards: IFA Quantum Dot Technology Gold Award, France's most authoritative third-party independent testing agency AVCESAR six-star top rating (the highest level is six stars), CES annual global display technology innovation award Wait.
The X5 primary color quantum dot TV introduced by TCL in March 2018 is one of them. X5 adopts inorganic quantum dot material, which has the characteristics of “high color gamut, pure chroma and long colorâ€. It can achieve “10 years without burning screen, ten years without fading, billions of colorsâ€, with Dolby ® Vision (Dolby Vision®) HDR, Harman Kardon audio and support for Dolby® immersive audio technology delivers a cinematic audiovisual experience for consumers.
At present, TCL not only expands the quantum dot product camp, but also deepens the quantum dot technology innovation. It is reported that TCL is developing the QLED electroluminescent luminescent material on the one hand, and on the other hand, it is involved in the research and development of the key plan of the Ministry of Science and Technology.
The core technology of the display field has always been in the hands of foreign investors. If Chinese enterprises can achieve the leading position in the field of quantum dot technology, it is believed that China will gain a stronger voice in the global display field. Under the joint efforts of the state, enterprises and R&D institutions, China's quantum dot display technology is expected to take the lead in achieving new breakthroughs globally.
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