What Is MicroLED?

- Dec 25, 2020-

01 What is microLED?


The microLED actually shrinks the LED screen panels we see every day to below 100 microns, and the single size does not even reach 1% of the original LED; then these micro LEDs are transferred to the drive circuit and glass substrate to achieve MicroLED screens of various sizes.


02 Comparison between LCD, OLED, and microLED


The advantages and advantages of microLED are based on the characteristics of its principle-micron-level pixel pitch, each pixel can be individually controlled and driven, so that its resolution, brightness, contrast, power consumption and other performance parameters are quite excellent. Comparing nothing inferior.


Compared with OLED, the biggest advantage of microLED is the service life. The microLED is made of inorganic materials, and its life and stability are much stronger than the organic molecules of the OLED screen, and it is not prone to burn-in and aging. For Samsung mobile phones that have been complained about burn-in problems in the past, such stable characteristics I believe it is a dream.


Of course, the failure of the microLED with such superior performance to be popularized means that its limitations are also very obvious, and the technical process is currently the most urgent problem to be solved. To officially commercialize microLEDs, mature miniaturization process technology and mass transfer technology are indispensable-the former solves how to shrink millimeter-level LED chips to only 1% of the original size, and the latter solves how to reduce such high density , Arrayed, thin-film LED crystals are transferred to the drive panel.


03 Future market of microLED

MicroLED represents an emerging flat panel display technology, which uses microscopic LED arrays as display pixels. Compared with traditional LCD displays, microLED displays can provide excellent contrast, faster response time and lower energy consumption.


Following Samsung, Sony, Konka and other companies, Leyard and LG have also launched microLED TV products. With the continuous influx of mainstream manufacturers and the continuous reduction of costs, Micro LED is expected to be more mature in the commercial screen market.


The Micro LED commercial display that represents Lehman Optoelectronics has been widely used in various scenarios including high-end conferences, big data centers, intelligent command centers, monitoring centers, exhibitions, radio and television studios, etc., and market sales continue to rise.


Several major technology companies are taking measures to improve MicroLED technology and manufacturing.


Taiwanese company AU Optronics recently launched a prototype of a 9.4-inch flexible display. The device uses a plastic substrate and low-temperature polysilicon as the driving circuit. The pixel design is implemented using blue Micro LED and red-green conversion color film.


Plessey Semiconductors (Plessey Semiconductors) announced that it will help Facebook to prototype and develop new technologies for potential applications in the augmented reality/virtual reality field.


Samsung Electronics launched a TV prototype of an RGB microLED display using chip-on-board (COB) technology in 2018, and the company plans to launch the product in 2020. Samsung Display has also begun to develop quantum dot nanorod LED (QNED) technology, applying nanorod LEDs to oxide TFT glass substrates.


In addition, many consumer brands are expected to launch their own MicroLED displays or devices in the near future.


Once the technology for manufacturing microLED chips-including massive transfer-becomes more mature, the microLED market will usher in more rapid growth. The increasing use of microLED display technology will push display manufacturers forward from the current LCD and OLED display technologies.


Driven by the increasing demand for innovative self-luminous displays, data media predicts that by 2027, global shipments of microLED displays will surge from a negligible level in 2020 to more than 16 million.