A design method for control unit of the TFT touching screen based on FPGA is described in this paper.Using a NiosⅡ processer built by FPGA
the corresponding point on the TFT and touching screens can be corrected automatically according to the programs in processer and the driver circuit between TFT screen and the ADS7843 chip.It is indicated that the control unit of the TFT touching screen based on SOPC technique has the advantages of quick response and exact touching
which can be compatible with all kinds of TFT touching screen