Full-Color Pixelated-Addressable Light Emitting Diode on Transparent Substrate (LEDoTS) Micro-Displays by CoB

In this paper, we report the design and fabrication of full-color pixelated-addressable light emitting diode on transparent substrate (LEDoTS) micro-displays. The LEDoTS micro-displays were realized by integrating monochromatic LEDs on a transparent quartz substrate using chip on board (CoB) technique. The full-color pixel has a pitch of 1 mm (P1) and includes red, green, and blue monochromatic LED chips. The pixelated-addressable driving circuit was designed on a custom PCB to provide constant current and individual addressing of each LED pixel with a certain frequency of row and column scanning. With a peripheral FPGA board, the LEDoTS micro-displays were programmed to display representative images and animations.