Device for receiving photoelectricity white plate signal
A signal receiving device and whiteboard technology, applied in the direction of electrical digital data processing, instruments, data processing input/output process, etc., can solve problems such as pen operation and position calculation errors, signal reception interference, and affecting the normal use of products, etc.
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[0011] The photoelectric whiteboard signal receiving device of this embodiment is as figure 1 As shown, the calibration camera (1) is an ordinary small-volume camera that can receive visible light images, and its lateral receiving angle is about 35 degrees. The light pen tracking camera (2) is also an ordinary camera, and its lateral receiving angle is also about 35 degrees. 35 degrees, a filter (5) is arranged outside the lens of the light pen tracking camera (2), which is a filter that absorbs infrared light through visible light, and the interface circuit (4) is used to connect the computer and the processing circuit (3), the calibration camera (1) and the light pen tracking camera (2) are all connected to the processing circuit (3), their positions are close to each other, pointing to the same direction so that the receiving range is the same as possible, the processing circuit (3) and The interface circuit (4) is connected. In the coordinate calibration stage, the comput...
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