The Trend And Development Of Quantum Dot Panel Technology

  The development prospects of liquid crystal panel technology are limited. In order to prevent AMOLED panel technology from continuously advancing, more and more companies choose to introduce quantum dot technology solutions in high-end products, and use quantum dot technology to increase the characteristic performance of liquid crystal panels, even in Apple A number of patents have been obtained in the field of quantum dot technology, making the future development of quantum dot panel technology highly anticipated by the market.

  Looking at the technical architecture of the LCD screen, the backlight design has always been the key design of the LCD. The excellent backlight and the spectrum effect of the backlight generally influence the image quality level of an LCD screen! At present, most common cost-effective LCD screens use high-brightness blue LEDs and add phosphors with packaging materials to obtain a backlight effect close to white light. In fact, this method is cost-effective, but it is also due to the lack of real red light. /Green hybrid light source limits the color rendering ability of the panel. As for the novel Quantum Dot panel technology, the biggest benefit at present is to use blue backlight as the basis for precise conversion to achieve red/green backlight requirements, thereby expanding LCD The color rendering ability of the panel.

Improve nanotechnology through material technology to make optical materials more prominent

  Observed by quantum dot panel technology, generally speaking, materials whose length, width, and height are limited to less than 100 nm can reach quantum dots or nano particles, and most industries are keen on developing nano materials. The key is that, because One-dimensional conditions below 100nm can be called quantum wells (or nano-films), two-dimensional conditions below 100nm can be called nanowires, because the unit size of the material is extremely small, so the surface area of the material is relatively higher than that of the original material. The design ratio is much larger, because the area is relatively large, the characteristic action speed or performance is more obvious, and the characteristics of the material itself can be greatly optimized.

  Basically, if the material is made into a quantum dot size, because electrons are easily affected and change the energy level, the light energy intensity incidental to the combination of electrons’ sound and holes has been experimentally confirmed to be proportional to the size of the quantum dot. Its performance characteristics, that is to say, to control the light energy intensity of quantum dots, as long as the material of a specific quantum dot size is produced, the wavelength of light emitted by the corresponding physical effect can be controlled. In short, when the diameter of the quantum dot is larger, the wavelength of the light excited by the material is close to reddish; and when the diameter of the quantum dot is smaller, the wavelength of the light excited by the material is smaller, and the material can obtain bluish light. We can say that, The material design of quantum dots with different diameters can be controlled through the material, and in an ideal state, a continuous spectrum effect close to natural light can even be produced on the material.

  Quantum dot technology has many advantages, but mass production still has technology and cost bottlenecks to be broken

  Although quantum dot technology should be able to produce backlight modules with natural light effects if it can be mastered, it is actually quite difficult to manufacture semiconductor materials that achieve quantum dots. At present, most of them use cadmium selenide (CdSe), zinc oxide (ZnO) and blue light. LEDs irradiate quantum dot materials to produce red/green light effects, and related process optimization and cost optimization still require more investment in development resources.

  As for LCD panel design solutions that integrate quantum dot material technology, there are currently a variety of technical solutions. The common one is to use quantum dot technology to replace the yellow phosphor in the blue LED optical packaging material, and use the On-Chip process to convert the quantum dot material Packaged with the blue LED, the other is to arrange the material in the optical tube, connect the optical tube with the backlight source, and the light source obtained after the backlight and the quantum dot material are used for the design of the panel backlight. The third type is the backlight The optical material diffusion film is made by quantum dot technology.

  The existing companies that develop quantum dot technology solutions include Nanoco, Nanosys, QD Vision, etc. Among them, Nanosys has cooperated with the international material manufacturer 3M to develop the On-Surface solution backlight diffusion film optical material concept product. This is QDEF (Quantum Dot Enhancement Film) technical solution, the actual product material is susceptible to environmental influences, which shortens the life of the QDEF material. Therefore, in the 3M technical solution, our own optical material is used to cover and protect the QDEF quantum dot material, thereby extending the QDEF module’s lifespan. Service life, and the quantum dot panel technology evaluated by Apple is also reported to be based on the QDEF solution. In addition, the large flat-screen TV manufacturer Sony tends to insert quantum dot optical materials between the backlight and the panel, and integrates and optimizes the quality of the backlight in an On-Edge method. Related displays that have introduced quantum dot technology solutions also use Triluminos series models to attack the market.

  Quantum dot material technology tends to be practical, becoming the key to differentiation of LCD panel products

  Quantum dot LCD screen technology, in addition to the key technology for related panel manufacturers to fight against Korean AMOLED technology, in the LCD panel or TV audio-visual equipment market, LCD displays are already highly mature and standardized components, and it is difficult for related manufacturers to find product differences. In the current situation where panel technology tends to be homogenized, the optimization of the backlight solution highlights the key point of product differentiation. At present, many companies have introduced quantum dot wide color gamut display panel technology in consumer electronic products. For example, the small screen panels used in the HDX e-book products of Kindle Fire launched in 2013 and the Sony Triluminos series LCD TVs are both Qianqi introduced LCD liquid crystal panel products with quantum dot wide color gamut technology.

  Even though the current quantum dot technology can be introduced into existing consumer product liquid crystal panel applications by replacing the diffusion film or changing the backlight design, in fact, the wide color gamut technology of quantum dots must be adopted by new products in large numbers. Quite a few technical bottlenecks need to be overcome.

  First of all, the early quantum dot wide color gamut technology still has the problem of cadmium in key components, because cadmium will cause product waste or environmental pollution problems derived from recycling. In the face of rising global environmental awareness, it will also cause the introduction of quantum dot screen technology to suffer Doubt, in addition, the cost of obtaining key materials for the current quantum dot wide color gamut technology is still high, and the patents for related technologies are in the hands of only a few companies. The competitiveness of terminal prices is reduced.