Liquid crystal handwriting board local erasing method applying virtual keyboard
A virtual keyboard and liquid crystal handwriting technology, applied in the field of handwriting pads, can solve the problems that the technology of partially eliminating handwriting pads is not mature enough, cannot be brought to the market in a large area, and the production cost is high, and achieves easy replacement and repair, simple structure, and production cost. low effect
Pending Publication Date: 2022-07-15
YIWU BAIBIAN ELECTRONICS TECH CO LTD
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Problems solved by technology
[0005] In order to solve the above problems, the present invention proposes a partial erasing method of a liquid crystal handwriting board using a virtual keyboard, which solves the problem that the e
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[0045] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0046] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relationship between various components under a certain posture (as shown in the accompanying drawings). The relative positional relationship, the movement situation, etc., if the specific posture changes, the directional indication also changes accordingly.
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The invention discloses a liquid crystal handwriting board local erasing method applying a virtual keyboard, which comprises the following steps of: providing a handwriting board provided with the virtual keyboard, arranging a liquid crystal display screen on the handwriting board, splicing a plurality of character cells to form an inner screen of the liquid crystal display screen, and if local erasing is needed, starting the virtual keyboard, the laser projection module projects laser to the liquid crystal display screen to form a plurality of laser projection cells, the laser projection cells correspond to the sub-cells in position, a user clicks the laser projection cells corresponding to the positions needing local erasing, the virtual keyboard analyzes and transmits signals to the second single-chip microcomputer in the handwriting board, and the second single-chip microcomputer is connected with the liquid crystal display screen. According to the invention, a voltage erasing mode is continued, the production cost is low, the maintenance is convenient, the device can be suitable for the local erasing of a large-area liquid crystal display screen, only a virtual keyboard needs to be started and a position needing to be erased is clicked, force does not need to be applied, the operation is convenient, and the response is rapid.
Description
technical field [0001] The invention relates to the technical field of handwriting pads with a liquid crystal screen, in particular to a method for partially erasing a liquid crystal handwriting pad using a virtual keyboard. Background technique [0002] At present, in the fields of education and business applications, the application of LCD tablet is more and more extensive, and the performance demand of LCD tablet drives the continuous development of LCD tablet technology and the upgrading of products. [0003] In the field of LCD tablet, the erasing method of LCD tablet is mainly to erase all after power-on. This method has a great impact on user experience, and it is also the biggest obstacle for LCD tablet to expand the market, especially to enter the education market. The external fields that affect the arrangement and structure of liquid crystals mainly include sound, light, electricity, heat, and magnetism. The current mainstream local erasing methods use three exter...
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Login to View More IPC IPC(8): G02F1/1333G02F1/13G06F3/041G06F3/04886
CPCG02F1/1333G02F1/13338G02F1/1313G06F3/0414G06F3/04886
Inventor 何君其
Owner YIWU BAIBIAN ELECTRONICS TECH CO LTD