Pen color recognition device for electronic blackboard

Abstract

The invention provides a pen color recognition device for an electronic blackboard, which comprises an inductor, induction targets and a processing unit, wherein the inductor is used for inducing the induction targets, converting induction results to corresponding electric signals and transmitting the electric signals to the processing unit; the induction targets are arranged on set positions of a writing pen, and are used for recognizing pen color of the whiting pen in different number and distribution positions; and the processing unit is used for processing the electric signals transmittedby the inductor and generating corresponding pen color recognition results according to the changing condition of the electric signals. The device has the advantages of simple structure and high recognition rate.

Description

technical field [0001] The invention relates to the field of color recognition, in particular to a pen color recognition device applied to an electronic blackboard. Background technique [0002] At present, the color recognition methods of digital electronic blackboards on the market for the built-in writing pen mainly include infrared fixed pen color recognition and color sensor recognition. The way to realize the infrared fixed pen color recognition is to put the pen in the pen slot of the fixed color, and then identify the color of the pen by identifying which color pen slot the pen is placed in, so that the same pen is placed in a different color. Different colors will appear in the pen tray. However, the recognition rate of this method is easily affected by the infrared light component of ambient light, resulting in false recognition. For the color sensor pen color recognition, the realization device requires high machining precision, and at the same time, the placeme...

AI Technical Summary

Problems solved by technology

However, the recognition rate of this method is easily affected by the infrared light component of ambient light, resulting in false recognition

However, for color sensor pen color recognition, the device requires high machining precision, and at the same time, the pen placement position in the pen slot is relatively strict, so it is difficult to realize and the misjudgment rate is relatively high.

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