Local erasing method based on touch track recognition, writing board, blackboard and drawing board

Abstract

The invention provides a local erasing method based on touch track recognition, a writing board, a blackboard and a drawing board. The method comprises the steps that a touch recognition mode is usedfor recognizing a touch object, when the width of the touch object is within a preset width range, the motion trail of the touch object is recognized, whether the touch object does reciprocating motion within a preset range or not is judged, and when the number of times of reciprocating motion is larger than the preset number of times, the position covered by the reciprocating motion is locally erased. The motion trail of the touch object is recognized through induction, local erasing in a smaller range can be achieved, and confusion misjudgment of writing and erasing is avoided.

Description

technical field [0001] The present disclosure relates to the technical field of partial erasing of writing boards, in particular to a method for partial erasing based on touch track recognition, a writing board, a blackboard and a drawing board. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art. [0003] Although the light energy blackboard has realized one-key clearing and partial erasing functions of the board eraser, for example, the patent number CN208367361U is a kind of writing film, writing board, blackboard and drawing board that can realize partial erasing, which can realize partial area erasure of the written content. While other areas are not affected by erasing, it overcomes the shortcomings of traditional technology that can only achieve full erasing; Patent No. CN110147171A liquid crystal writing film partial erasing voltage generation...

AI Technical Summary

Problems solved by technology

[0004] But, the inventor of the present disclosure finds: (1) common blackboard eraser is easy to influence the handwriting on the side when wanting to erase the handwriting of a smaller range (for example 2cm-4cm diameter) than blackboard eraser in the course of actual use, i.e. Erase the handwriting that should not be erased; (2) If the diameter of the eraser is too small, the efficiency is low when erasing a large range of handwriting, and it is easy to be confused with the recognition of the writing pen, resulting in the synchronous transmission function of handwriting and erasing affected

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