Patent ID: 7499034

Claim:
An electronic whiteboard having flexible membrane electromagnetic induction generating device, including an electronic whiteboard main unit having a writing layer as surface, a bottom support bracket layer as bottom, an input induction section, a recognition controlling circuit, a signal output device inside between the said two layers and a frame around, and also including an input pen, characterized in that: said induction section is composed of a covering layer, an electromagnetic induction generating layer and a bottom support bracket layer, wherein the base layer of the electromagnetic induction generating layer is an insulated flexible membrane which can be a film material, the surfaces of membrane are printed with an electromagnetic induction receiving antenna array which is induction antenna cells distributed along X axis and Y axis, thereby a flexible membrane electromagnetic induction generating layer is constituted, the output of that electromagnetic induction generating layer is connected to the recognition controlling circuit, and the input pen has a radio signal generating device; said signal output device is a cable connecting device which is a cable having USB joint interface or a wireless data communicating device which is a radio frequency transceiver, and said signal output device is connected to a computer and/or a printer and/or a data storing equipment directly; said induction antenna array cells are the cells printed on the two sides of the membrane surface respectively; more than one layer of induction antenna cells along X axis and Y axis are the cells printed on the two sides of the membrane surface and the layers are insulated from each other; and the intervals between the induction antenna cells of each layer are different for more than one layer of induction antenna cells.