I don't quite get it, but I think you are really terrific Uncover the mysterious coat of Micro-LED

Recently, because Apple will use AMOLED screen, so that the concept of a fire OLED. The next generation of OLED is considered to be the next generation of Micro-LED seems to be no longer low-key, winning glory in the Taiwan International Conference on solid state lighting. Compared to OLED, Micro-LED technology for many people is still relatively unfamiliar, but more and more attention. Today Xiaobian on the concept of Micro-LED, advantages and disadvantages, the current status quo and technical bottlenecks to explain, what is not appropriate to welcome you to discuss the message.

What is Micro-LED?

Micro LED technology, namely LED miniaturization and matrix technology. Refers to a chip small size high density integrated LED array, such as LED display each pixel addressable, separate drive light, can be regarded as a miniature version of the outdoor LED display, pixel distance from millimeter to micron size reduction.

Micro LED display, is a manufacturing process for CMOS integrated circuit normal bottom made of LED display driver circuit, and then use the MOCVD machine LED array on an integrated circuit, so as to realize the micro display, the LED display is a smaller version of the.

Prominent advantages

Micro LED advantage is obvious, it inherits the characteristics of inorganic LED with high efficiency, high brightness, high reliability and fast response time, and with self luminous characteristics without backlight, more energy saving, simple mechanism, small volume, thin advantage.

In addition, Micro LED also has a big characteristic is the resolution is high. Because the ultra small, the performance of the resolution is particularly high; it is said that if Apple iPhone6S using micro LED, resolution can be easily more than 1500ppi, higher than the original Retina display 3.75 times higher

Compared with OLED, the color is more accurate and easy to debug, and has the advantages of longer luminescence lifetime, higher brightness, better material stability, long service life, no image mark, etc.. Therefore, after another OLED thin and power-saving advantages of the display technology, which is common with OLED also need to TFT backplane drive, so TFT technology level of IGZO, LTPS, Oxide.

Disadvantages of existence

1, the cost and the disadvantages of a large area of application. Rely on silicon substrate driving circuit, and then before Apple released the patent, there are steps to transfer to the silicon substrate LED from sapphire substrate, which means making a screen at least two sets of substrate and independent process. This will lead to rising costs, especially in the larger area of application, will face a good yield and cost will be a huge challenge. (for the one or two inch silicon substrate, is a big area, with full width and larger in stroke length CMOS sensor product price) of LuxVue from the viewpoint of technology will drive the circuit substrate is converted into quartz or glass to reduce the application cost of large area is feasible, but it also need time. Compared to the mature LTPS+OLED AMOLED program, the cost advantage.

2, luminous efficiency advantage is PHOLED threat or even anti. OLED (Phosphorescent OLED, PHOLED phosphor) to enhance the efficiency of green materials company UDC PHOLED obvious to people, also have the Samsung GalaxyS4 and subsequent models on the panel to start business, power consumption and high PPI panel has a slight advantage or even TFT-LCD. Once the blue light PHOLED material to solve the problem of life and business, inorganic LED will also account for less efficient.

3, brightness and life are QLED threat. QLED research is now very hot, from the data provided by the QD Vision look at both efficiency and life expectancy is very promising, but also engaged in the study of large companies. Of course, QLED is also a strong competitor OLED.

4, it is difficult to make curly and flexible display. OLED and QLED flexible display good prospects, but also has a lot of Prototype display, but for the LuxVue to make it more difficult to curl and flexibility. If you want to create products such as iWatch, the screen does not have a certain curvature is not aesthetic.

Present situation

Speaking of the development status of micro LED, said the current CEO is Samsung OLED Nouvoyance panel P pixel arrangement founder CandiceBrown-Elliott, only a few people know and engaged in this field before Apple's acquisition of LuxVue, and now many people have started to discuss this technique.

The two experts in Micro-LED technology also said that last year, the technical level is also difficult to apply a variety of practical screen panel production, is unlikely in the near term to see this screen technology in iPhone, iPad or iMac products. But for smaller screens, Micro-LED is still a viable option, like Apple Watch and other small screen applications.

In fact, since the LuxVue is Apple's revenue, see VerLASE company announced the acquisition of breakthrough color conversion technology, this technology can make the full color MicroLED array is suitable for near eye display, then there has been no relevant reports. Recently, LEDinside received a message from the recent Taiwan solid state lighting seminar, Leti, University (Texas Tech) and PlayNitride are at the seminar to show their own microLED research and development results.

Leti launched the iLED matrix, its Blu ray EQE9.5%, brightness up to 107Cd/m2, green EQE5.9%, brightness up to 108Cd/m2, the use of quantum dots to achieve full-color display, Pitch only 10um, the future goal to achieve 1um. Leti short-range plan cut from smart lighting, medium range 2-3 into the HUD and HMD market, grab the ride VR/AR hot, long-range goal is to cut into large size display applications within 10 years.

The Taiwan Play Nitride announced the same