Handwriting input device

Abstract

The invention discloses a handwriting input device, which is wirelessly connected with a computer. The handwriting input device comprises a handwriting pad and a handwriting pen which are wirelessly connected, and the handwriting pen comprises a parallel resonance circuit for power supply, a radiofrequency transmitter connected with the handwriting pad and a radiofrequency receiver connected with the computer, wherein the handwriting pad receives handwriting data information of users; the radiofrequency transmitter sends the handwriting data information to the corresponding radiofrequency receiver; and the radiofrequency receiver sends the handwriting data information to the computer. The invention discloses the handwriting input device which is applicable to remote handwriting input and is wireless and passive; and the device has the advantages of simple structure, short activation time, less power consumption, less resource occupation and relatively lower cost, can also ensure the longer wireless transmission distance, and has good multi-point network connection capability.

Description

technical field [0001] The invention relates to the technical field of handwriting recognition, in particular to a handwriting input device. Background technique [0002] A handwriting input device is a computer input device, such as a handwriting tablet, a digital tablet, etc., generally uses a special pen to write characters or draw graphics in a specific area. The handwriting input device records the trajectory of the pen through various methods, and then recognizes it as text or graphics. It can be used for circuit design, CAD design, graphic design, free drawing, text and data input, etc. After years of development, handwriting input technology has become more and more mature. At present, the mainstream handwriting input device products on the market include: wired tablet (there is a connection line between the tablet and the stylus), wireless tablet (the connection between the tablet and the stylus) No cable) and wireless passive tablet (no cable between the tablet a...

AI Technical Summary

Problems solved by technology

[0005] Second, due to the complex structure of the Bluetooth protocol stack, it consumes a lot of system resources (occupying system resources is about 250Kb), and the Bluetooth device consumes a lot of power, and the development cost is relatively high;

[0006] Third, the transmission distance of Bluetooth is relatively short (only about 10 meters), and it is necessary to increase the transmission power to realize long-distance handwriting input. However, wireless handwriting tablets are generally powered by batteries, and a relatively large battery is required to achieve long distances. energy, and range is still limited by battery power;

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