whiteboard software. Positioning the target A (writing pen or eraser), because the positioning target A is mounted with a collar made of laser self-reflecting material, so after scanning to the positioning target A , the scanning laser returns the original path, and the two laser transceivers receive corresponding Reflected laser, the signal processing circuit in the figure is responsible for extracting the positioning information and color information of the positioning target from the laser reflection information, and transmitting the coordinates and color information of the positioning target to the PC , and the PC software will locate the target on the whiteboard writing board. The motion track on it is displayed on the software interface. Chapter IV Analysis of Demand for Electronic Whiteboard Market. The IQAio GR519 is an upgraded lightweight version based on the original IQAio GR511. The original dual-cavity structure was changed to a bottom-edge structure, so that the minimalist design accommodates modern classrooms and conference rooms. With one IQProjector V2 and one IQView E3821, you can achieve flexible and intelligent classroom.