Design of LED Display System Based on SDRAM Memory

At present,in view of the widespread application of the LED display,and present situation of the intense competition in the market,the sub-control system's design proposal based on high speed dynamic memory was proposed,in order to reduce the cost of the sub-control system's hardware and enhance the competitive power.First of all,the sub-control system on the basis of the static RAM was analyzed in detail,and the result of the analysis indicated that,under certain indicators,the number of the pixels was dependent on the single read clock rate of the scanning module in this sub-control system.So the new system based on the high speed dynamic memory was designed,First,the maximum value of the single read effective frequency of the scanning module was parsed.It came to the conclusion that the demand of the reduction of the cost could be supplied by using this new sub-system.Then,two kinds of the design were proposed for this new system.By comparison and calculation,it proved that the dual function can be implemented by using a piece of the dynamic memory in the design,but not by using two pieces of the dynamic memory.And in the end,the design which how to be implemented was analyzed,and all of the functions were completed.Finally,the hardware cost of the new system was not enhanced,but the controllable picture element points of the new design is two times larger than that which took the static RAM as memory.