| 摘要 |
The present invention relates to a coordinate recognition device for an electronic blackboard. The present invention is to evenly spread beams to the corners of an electronic blackboard by comprising a light emitting part having light sources and a light diffuser and by diffusing the beams spread from the light sources. By doing this, reflecting beams reflected from reflective materials will be sufficient so that they can accurately recognize the coordinate of a touch part. Also, the light diffuser comprises a round bar. By arranging both ends of the round bar to face the front and back sides, the beams can be evenly and sufficiently spread, thereby accurately recognizing the coordinate of the touch part. |
