In order to resist the influence of Korean panel makers on OLED technology and market, Taiwan LED manufacturers are actively developing Micro LED technology. However, the manufacturing process of Micro LED still needs to be broken. Therefore, Taichang will use Mini LED as a transitional solution to face OLED. For example, Innolux will launch a new “AM miniLED” aimed at the automotive panel market and it is expected to be available this year. Amount of output goods.
OLED is the mainstream display technology. However, OLED panel patents are mostly controlled by Korean factories such as Samsung and LG. Taiwan LED factory is relatively backward in OLED technology and market layout. To this end, the Taiwan Plant is aiming at Micro LED with certain technological advantages, hoping to expand the market advantage and dominance of the panel.
However, Micro LED still has many challenges in the process to be overcome, especially in the aspect of Mass Transfer. The Micro LED’s wafer transfer yield needs to reach 99.9% or more to reach the output standard. Therefore, how to improve wafer transfer yield is the biggest challenge for the current development of Micro LED. It is reported that the current number of transfers has reached 2,500, and it is hoped that a goal of transferring 10,000 can be achieved in 2018.
Due to the aforementioned difficulties, despite the fact that Taiwan plants have successively invested in the development of Micro LED, no related products have been produced in volume. In the case where the Micro LED’s transfer quantity, yield, and grain size have not reached the commercial level, the Taiwanese LED factory decided to promote the so-called “Micro-LEDs” (that is, Mini LED).
For example, Innolux released a panel for vehicles using the “AM miniLED” technology, which is expected to capture the market for automotive applications. Ding Jinglong, executive vice president of Innolux Technology Development Center, said that the AM miniLED can achieve the same level of contrast of OLEDs in vehicle applications, and it can also be antagonized with OLED in sharpness of the picture, and there is no possibility that OLEDs cannot be used in automotive applications. High temperature and other reliability, longevity, branding and other issues have many competitive advantages.
Ding Jinglong pointed out that AM miniLED means using active matrix circuits (AcTIve Matrix, AM) formed by TFTs to drive miniLEDs, so that they can really play their performance advantages and at the same time have reasonable costs.
Ding Jinglong explained that if we want to compete with OLED on the sharpness of the picture, we must do top-level HDR. That is, Local Dimming Zones must have hundreds of local Dimming Zones, and thousands of zones are sufficient. That is, the basic concept of a Mini LED is to add “each LED as a zone.” The idea. However, if we look at the traditional LED backlight driver circuit architecture, this concept will increase the cost and design difficulty due to the excessive use of components. In view of this, Innolux uses an active matrix TFT circuit to drive the AM miniLED architecture to solve the above problems.
As mentioned above, Micro LED still has many challenges to overcome. Innolux stated that before the launch of Micro LED products, the company will become the mid-term strategic product with “AM miniLED”, and the automotive market will be the commercial application of AM miniLED. The important goal is to further develop AM miniLED backlights for flexible substrates in the future to match profiled/curved LCDs to meet the design and appearance requirements of automotive customers.