A micro-LED display consists of many tiny light-emitting diodes, a few microns in size. According to the development status of 2019, micro-LED displays are mainly used in small mobile devices. Large displays
are still very costly to manufacture and are expected to hit the market in the later 20s. In the placement process, hundreds of thousands of micro-LEDs are positioned to form a micro-LED display. Since the production process is still very costly, micro-LEDs are currently still mainly used in microdisplays. For example, in smart wearables, smart watches, mobile phones, data glasses, VR glasses, Virtual Retinal Display (VRD), etc. The image resolution of fabricated micro-LED display can be HD quality or even the quality in UHD format
.resolution of 3,840 pixels horizontally and 2,160 pixels vertically, the pixels add up to 8.3 million, which must be positioned individually. Since each pixel consists of three micro-LEDs for red, green and blue, we are talking about a total of around 25 million micro-LEDs. The pixels are assembled in groups of several thousand in modules. The micro-LED modules consist of III-V compound semiconductors which, divided up as individual chips, are mounted and contacted on a backplane with a precision of one micrometer. The assembled micro-LED modules form the display for a large screen TV, video wall
, or movie wall. Micro-LED displays are much thinner than LED displays or OLED displays. Other advantages include high contrast and low black level, good color reproduction, short nanoscale response times, extensive color gamut, long life, and no burn-in effect. In addition, the viewing angle, high lighting efficiency and unique resolution should be mentioned. Micro LED displays achieve resolutions of 2,000 pixels/inch and can thus display videos, animations, virtual reality representations and, above all, High Dynamic Range (HDR).