In recent years, many manufacturers have exhibited Micro LED displays. Before the display technology is mass-produced, Mini LED will be the first to be listed as a backlight application for LCD displays. However, the trend of miniaturization of this wave of LEDs is not only a revolution in display technology, but also brings more possibilities for the application of smart headlights.
In recent years, the miniaturization of Light Emitting Diodes (LEDs) has revolutionized the display products. The direct-lit miniature LED backlight module provides LCD TV's more detailed Local Dimming technology for improved image contrast and high dynamic range (HDR).
Samsung introduced the 146-inch 4K×2K The WALL LED display screen after Sony introduced the 8K×2K 10m wide LED display screen CLEDIS (Crystal LED Integrated Structure). Even this year, the Onyx brand was first launched in Zurich, Switzerland, and the Cinema LED Screen, which is 10 meters wide and 5 meters high and has a resolution of 4K x 2K, was introduced in an attempt to gradually replace the projection D-Cinema.
In terms of small and medium size, AUO has introduced an 8-inch 1280×480 Micro LED display, while Jasper Display has introduced a 0.7-inch silicon-based backplane for Micro LED monochrome up to 1920×1080. The ultra-high resolution can be applied in the fields of AR/VR, HUD, HMD and smart headlights, subverting the impression of LED as a traditional lighting source.
Micro LED/Mini LED application is very different
In the turbulent trend, these new types of miniature light-emitting diodes have been popular in the name of Micro LED, but the size of the LED will cause a very different application, and the technical challenges are quite different. In particular, the technology of transferring a large amount of micro LEDs to a substrate is a challenge.
Therefore, it may be possible to further classify the miniature LEDs from the dimensions for a deeper discussion. At present, the common method in the industry is: if the LED size is more than 100, it is classified as a Mini LED, and if the LED size is less than 100, it is classified as a Micro LED.
The reason for using 100 as the boundary is somewhat related to the traditional LED process. The traditional LED process uses sapphire as the substrate, and its miniaturization can only be 5mil × 6mil,. When the size is further reduced, the yield of the sapphire substrate will be deteriorated.
Therefore, Micro LEDs are mostly developed on non-sapphire substrates. For example, AUO develops 8-inch full-color display screens with LTPS backplanes, and Lianguang develops 0.55-inch and 0.7-inch Micro LEDs with silicon-based backplanes. Kit.
Micro LED and Mini LED are very different in application. Mini LED is mostly used in large-size direct-lit backlight modules or direct-view displays, while Micro LEDs are mostly used in small-sized display applications, each with various technical complexity and challenges.
