In this paper,a design of multi adaptable AM LCD which is used in high capacity display graph is discussed.As a application,this design is used in the insruument of ultrasonic A/B scanner for ophthalmology.Under the condition of different input signal,Vsys,Hsys and dot clock signals are obtained,which are important to display effect.Some parts of this design can be used in multimedia display technics,such as TFT LCD TV,or the monitor of computer.Also,in this paper,we try to give a general design method,which is about high capacity TFT LCD application.