Ferroelectric Thin-film Spatial Light Modulator Drive Circuit

With the development and maturity of ferroelectric thin film technique recently, ferroelectric thin film can be applied optical electronics and integrated optics. Ferroelectric thin film spatial light modulator has some virtues, such as high integrated level, quick response speed, resistance to light injury, high resolution factor and so on. So it is applied widely in optical phase array and holography image and other fields. The development of ferroelectric thin film spatial light modulator can not be separated from the design of the self-contained complete driving circuit of it at the meantime. In this paper, electro-optic properties of ferroelectric thin films used for ferroelectric thin film spatial light modulator, as well as the device structure were specified. The display principle was investigated, compared it with that of liquid crystal spatial light modulator. The driving circuit of ferroelectric thin film spatial light modulator has been designed by field programmable technology.The main results of this thesis are as follows:According to electro-optic properties of ferroelectric thin film and the device structure, the driving circuit for ferroelectric thin film spatial light modulator was designed, including video display interface module, analog to digital converter module, data storage and control module, digital to analog converter module, electrical level converter module, the circuit module of supplying grey level voltage. The circuit and PCB of four layers have been designed by Protel99SE. The debug and assemblage of the driving system have been finished.The hardware design and software design of the dissertation for ferroelectric thin film spatial light modulator driver were investigated. The design was described with Verilog HDL, simulated and synthesized, downloaded to FPGA by the development tool named Quartus II of Altera Corporation. Some functions of the circuit have been realized in FPGA at the meantime, such as clock generator, digital gamma correction, I2C bus, memory, control signal generator and so on. The digital technology instead of traditional analog technology has been used to realize the functions of some integrated chips in FPGA, such as clock generator, gamma correction, phase lock loop, memory and so on.The driving circuit has been debugged and verified by the liquid crystal spatial light modulator. Good display effect has been obtained. So the purpose of the design has been reached.The driving circuit, which exhibits excellent transplantable performance, can be extensively applied in different scales, different kinds of flat panel displays (FPD) just by slight modification.