A Design of Multifunctional Led Written Screen Based on Wireless Transmission

This paper presents a design of a LED dot matrix written display system using Single Chip Micyoco (SCM). It completes the data acquisition function through the light pen with excellent photographic performance phototransistor, then it can achieve the following functions, such as click light, draw light, reverse display, entire screen erasure, stroke erasure, multi characters written and so on. The display includes two parts, handwriting screen and color dot matrix screen display, which are connected by wireless. By light pen writing in the writing area, it can display in color dot matrix display area, it also has the function of key operation and has a USB interface. Therefore, it can transfer text and picture messages to dot matrix display area. This paper presents the hardware design and its schematics, gives the general flowchart of software. This design is a low-cost wireless display design scheme, it has the advantages of simple design, easy to use, etc.