Guangzhou International Symposium On Display Technology: MicroLED Display Technology & QLED

- Apr 13, 2018-

At the 2018 International Display Technology Conference (ICDT 2018), the Taiwan regional manufacturer Playnitride displays Micro LED displays, making the presence of visitors stunning, with a total of 3 colors, white, green and full color. The 0.89 'display is applied to watch, the PPI is about 169, and the blue LED chip +Phosphor color scheme is used. In addition, there are 0.8 'monitors, PPI increased to 230, and monochrome schemes with green LED chips. Finally, the full-color 0.89 'display is also displayed, using RGB LED chip combination, about 103 PPI. A future neptunium continue to improve technology, to display LED towards Micro commercial road ahead.——MicroLED Display Technology

Also for the manufacturer of backboard driver and lotus photoelectric (Jasper Display), the Micro LED display with Silicon as the backboard is displayed. The display technology has developed to 0.7 ', and the display size can reach 4K resolution. Although it is monochromatic display, the smallest Pixel Size can reach 3.74 u m, with high display effect.

Leti's Francois Templier mentioned that Micro LED is applied to a display used in AR VR and other wearable displays to meet high resolution and low display area requirements, so LED chip size and LED Pitch will be smaller. The maximum limit of the traditional Flip Chip Bumping is about 15 mu m, and if Micro Tube is made on GaN Array on Wafer, Micro Tube will be inserted directly in contact with the substrate bonding. Short LED bonding pitch. At present, Leti has applied this technology to monochromatic displays, Pixel Pitch is about 10 m, and resolution is 873 x 500 Pixels.——MicroLED Display Technology

Professor Liu Jimei pointed out that Micro LED is becoming smaller and smaller in the future as LED chips are becoming smaller and smaller. In addition to the technology of transfer, the quality of LED's chip manufacturing needs to be stable and mature to improve production capacity and reduce production costs. As far as circuit design is concerned, we will take mature integrated circuit design as the main part to find the most suitable Micro LED driver.——MicroLED Display Technology

At present, the minimum Micro Display developed by Professor Liu Jimei can reach 0.19 ', 1700 PPI, which is a monochromatic display scheme. The application of LED miniaturized quantum dots will not be absent, so Professor Liu's team also uses the technology of quantum dots to achieve full color. At present, the RGB quantum dots are evenly coated on Micro Display by using ink-jet printing. The display is about 3.6mm (L) x 3.6mm (W), and the resolution rate is about 40 x 40 pixels.——MicroLED Display Technology

San an optoelectronic Xu Chenke vice president points out that Micro LED has a higher evaluation than other display methods such as LCD, LCOS, DLP and OLED. In contrast to the wider application of OLED display applications, Micro LED is better in brightness and trust, and can be used with soft substrates to achieve flexural properties, so three an optoelectronic Watch Good Micro LED develops and develops actively.——MicroLED Display Technology

At present, San an optoelectronic can form a RGB full color Micro LED display, in which the external quantum efficiency (EQE) of RGB chips is estimated to be 18%, 30%, 60%, and the future continues to rise. In addition, Xu Chen Department also mentioned that the three an optoelectronic can also provide the chip transfer, Bonding, and other technical services, such as the horizontal or vertical electrode LED chip. The size of the Flip Chip chip of the horizontal electrode is about 30~100 m, and the vertical electrode chip can reach 10~100 m.——MicroLED Display Technology

Professor Yang Xuyong of Shanghai Univer has pointed out that the development of QD application on LED is limited by price and life. QD material price is not cheap, so related applications can be easily transferred to consumers, thereby reducing market competitiveness. In addition, life ranges from about 100~1000 hours, so Professor Yang Xuyong tried to add metal oxide films to QD to increase the stability of QD and increase its life. After testing, life expectancy can reach 16000 hours (@100 NITS), which will help further QD application in LED. (LEDinside Max)——MicroLED Display Technology