As a hot product in the LED display industry, Micro LED is considered as the leader in next-generation display technology. Many domestic and foreign manufacturers are concerned about micro-LED, the market prospects are good.
According to the latest report from LEDinside, the revenue of the micro-LED market is expected to reach $2.891 billion.
Despite promising prospects, micro-LEDs still face a huge technical bottleneck. Some key technologies and equipment have not yet achieved a breakthrough. In this case, LED company has begun to develop Mini LED, which is a relatively mature transition technology.
Image: Micro LED Adafruit Industries via Flickr CC2.0
What is the difference between Mini LED and Micro LED? Since the concepts of micro-LEDs and mini-LEDs are widely discussed, what are they? What is the difference between the two? For clarity, LEDinside offers readers the following details.
In theory, Mini LED and Micro LED represent two different things. Micro LED is a new generation of display technology, with a matrix of miniaturized LEDs. In short, the LED backlight is thinner, more compact, and the LED unit is less than 100 microns. Like OLEDs, each pixel is individually addressed and emits light (self-illumination).
Mini-LEDs, also known as "sub-millimeter light-emitting diodes," are the first LEDs of about 100 micron size proposed by Epistar. The mini LED is a transition technology between the conventional LED and the micro LED, and is an improved version of the conventional LED backlight.
Micro LEDs have a simpler structure and better performance, but the biggest problem is mass transfer. The current challenge is how to miniaturize the LED, which requires wafer level technology. For example, a 4K micro LED screen requires more than 24.88 million LED chips.
In the manufacturing process, micro-LEDs have a higher yield than micro-LEDs. When coupled with a flexible substrate, the Mini LED is also suitable for notch designs and highly curved backlights. The local dimming function also helps the mini LED product to have better color rendering performance. For LCD panels, Mini LED technology can achieve more types of HDRs, while Mini LED products can be as thin as OLEDs while also saving power.
Due to different chip sizes, Micro LED and Mini LED are used in different fields.
General-purpose LED chips are mainly used for lighting and backlight modules in displays; while Mini-LEDs are used for energy-saving, thinner, backlight applications for HDR and notched design displays, such as displays for smart phones, televisions, car displays, and gaming laptops. As for the micro LED, its application is completely different from the former two. As a new display technology, Micro LED can be applied to wearable mobile phones, smart phones, car displays, augmented reality/virtual reality products, walls and television displays.
Miniature LEDs inherit the advantages of inorganic LEDs, such as high efficiency, high brightness, high reliability, and short response time. On the other hand, micro-LEDs have self-luminous (no backlight) characteristics, making them smaller, lighter, thinner, and more energy-efficient.
For mass production, Mini LED technology is easier to achieve mass production than Micro LED. Most of the existing equipment can be used for mass production of Mini LEDs. In addition, Mini LED is more economical due to its potential in the LCD display backlight market.
It is estimated that the cost of a liquid crystal panel using a mini-LED backlight is only 70-80% of that of an OLED TV panel, and the performance is almost the same. At the same time, 65-inch LCD panels with Mini LED backlight use 18,000 to 20,000 LEDs, which will consume a lot of LED chip makers' production capacity.
In general, the revolutionary next-generation display technology, Micro LED, will make significant improvements in image quality, but the current technology is not yet mature. The Mini LED is an improved version of the LED backlight, but it can still significantly improve the image quality of LCD displays. Moreover, it is easier to control the cost of mini-LEDs, and mini-LEDs are more likely to become the mainstream of the market.
Mini LED market will be promising in the next two or three years, micro LED will become the future superstar
According to LEDinside, many LED companies have been investing in Mini LED technology, such as Epistar, Lextar, San'an Optoelectronics, HC SemiTek and other upstream fabs, Everlight, Advanced Optoelectronic Technology, Harvatek and other packaging companies, such as Macroblock, Raydium, Jasper Display. Other IC designers, panel makers such as AU Optronics and Innolux, and digital display manufacturers such as Leyard.
These companies also cover mini-LEDs. AUO and Taiwan's two major panel makers, Innolux, will launch mini-LED backlight products this year. In addition, some companies in mainland China also announced that they will enter into mass production of Mini LED products.
For example,Refond said that it is working with world-renowned telecom companies to develop smart phone Mini LED backlight module and flexible bending Mini LED package, and has entered the small batch production; Shenzhen MTC Optoelectronics Co., Ltd. (BMTC) is currently developing micro LED technology, including crystal Round, packaging and mass transfer technology. At the same time, through the cooperation with well-known Chinese smart phone manufacturers, we are focusing on the development of mini-LEDs and have entered the mass production phase. It can be seen that in the next two to three years, the mini LED market will have the opportunity to expand.
Mini LED is a transitional product, so it is still difficult to predict its development cycle. This mainly depends on whether the industry can break through the technical bottlenecks of micro LED. Until the large-scale transmission technology matures, the products and applications of micro-LEDs still have a long way to go. However, breakthroughs in micro LED technology are coming soon, and major manufacturers and start-ups are investing in this area.
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