Design of Driving Circuit for 16 × 16 Dot Matrix Nano-Diamond Coating Field Emission Display

Field emission cathode of Ti-based nano-diamond coating is prepared by electrophoresis. The test of field emission characteristics shows it can achieved stable field emission. Threshold field strength of samples is 5.8V/μm, and field emission current density can achieve 70.2μA/cm² under 20V/μm field strength. the prepared field emission cathode is applied to the FED, and then the logic circuits at the base of AT89S51 control center as well as the high voltage driving circuits based on high voltage driving chip IR2113 and high voltage MOS are designed. According to the characteristics of nano-diamond, scanning and display program is designed and written in assembly language. 16×16 Chinese characters dot matrix are displayed on LED, which verifies the scanning program of the designed software and further verifies the correctness of the designed nano-diamond FED logic control circuit. Finally, the methods of how to connect single chip microcomputer of driving circuit with the back logic control circuit are provided in order to realize large-screen display, which provides a certain basis for commercialization of nano-diamond FED driving circuit.