3400 PPI Active-Matrix Monolithic Blue and Green Micro-LED Display

With rapid developments in display technology and high-speed communication, augmented reality (AR) and virtual reality (VR) are emerging as nextgeneration display platforms for human-machine interactions. Recently, many significant strides have been made for the micro-light-emitting diodes (Micro-LEDs) display. However, to satisfy the requirements of AR/VR application, the size and resolution density of display have become extremely important. In this article, a 0.39-in 1024 x 768 blue and green active-matrix Micro-LED display with 3400 PPI featuring a pixel size of 5.5 mu m and a pixel pitch of 7.5 mu m was designed and fabricated. The blue and green Micro-LED displays exhibit excellent electrical and optical characteristics, including the low forward voltage of 3.3 and 3.2 V, and the brightness reach 7.2 x 105 and 1.7 x 106 cd/m(2) (nits) at 1 mA, respectively. These microdisplays demonstrated 8-bit grayscale images and videos vividly through the control of PWM frame generated by the FPGA board. We expect that the presented method could pave the way toward high-performance Micro-LED displays for AR and smart glasses.

Automated summary

With the development of display technology and high-speed communication, augmented reality (AR) and virtual reality (VR) have become emerging display platforms for human-machine interactions. This article presents the design and fabrication of a 0.39-inch 1024 x 768 blue and green active-matrix Micro-LED display with a pixel size of 5.5 μm and a pixel pitch of 7.5 μm. The blue and green Micro-LED displays demonstrate excellent electrical and optical characteristics, including low forward voltage and high brightness. The control of PWM frame generated by the FPGA board allows vivid display of 8-bit grayscale images and videos. This method is expected to pave the way for high-performance Micro-LED displays for AR and smart glasses.