Erasable liquid crystal handwriting device and erasing method

Abstract

The invention discloses an erasable liquid crystal handwriting device and an erasing method. The handwriting board comprises a handwriting screen, a signal receiver, a memory, an image decoder, a controller and an erasure driving circuit, the handwriting screen comprises a liquid crystal handwriting module and an OID coding layer arranged on the liquid crystal handwriting module, the liquid crystal handwriting module comprises a plurality of conductive areas, each conductive area corresponds to at least one OID code on the OID coding layer, and the OID coding layer is connected with the controller. The memory is used for storing the corresponding relation between the OID codes and the conductive areas, the erasure driving circuit is connected with each conductive area, the controller is connected with the erasure driving circuit and the image decoder, and the image decoder is connected with the memory and the signal receiver; the handwriting pen comprises a sensor and a signal transmitter, the sensor is connected with the signal transmitter, and the signal transmitter is in signal connection with the signal receiver. The sensor collects OID code information according to the action of the handwriting pen, the handwriting board erases patterns and characters in the conductive area corresponding to the OID code information, and the local erasing function is achieved.

Description

technical field [0001] The invention relates to the technical field of liquid crystal handwriting boards, in particular to an erasable liquid crystal handwriting device and an erasing method. Background technique [0002] The electronic liquid crystal handwriting panel utilizes the characteristics of the bistable liquid crystal, and in the case of no external electric field, it shows bright state or dark state respectively. It can display information without backlight and polarizer, so it is more energy-saving. The electronic LCD handwriting board can be written with the built-in stylus or hard objects, and the user experience and drawing effect are excellent. When the user needs to erase the content on the handwriting board, a voltage is applied to the handwriting board, and the liquid crystal molecules in the handwriting board are deflected under the action of the electric field and return to an orderly state, thereby eliminating the handwriting on the handwriting board. ...

AI Technical Summary

Problems solved by technology

[0003] In view of the deficiencies in the prior art, the purpose of the present invention is to provide an erasable liquid crystal handwriting device and erasing method, which can solve the technical problem that the existing liquid crystal handwriting board cannot be partially erased

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