The paper proposed a design scheme of TFT-LCD display system with high gray levels which takes FPGA as core controller.The system uses mixed gray modulation method of amplitude-FRC-space,which segments 10 bit R,G,B signal into high 8 bit data and low 2 bit data,and the low 2 bit data processed by space process are assigned to four adjacent 8 bit data equally,then the 8 bit data are segmented into high 6 bit data and low 2 bit data,and the high 6 bit data are used for amplitude modulation,the low 2 bit data ...