digital whiteboard healthcare. Optical whiteboard The optical whiteboard application is the latest optical image sensing technology, inherits the advantages of the infrared electronic whiteboard, and at the same time corrects the shortcomings, is not interfered by the strong light in front of the screen, has high touch precision, and the writing is smooth, which can be completely consistent with the usual writing habits. There will be no delay. As of 2013, it is widely used in schools, training, and conferences.. 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.