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Electromagnetic touch device and coordinate positioning method thereof

An electromagnetic touch and coordinate position technology, which is applied in the input/output process of electrical digital data processing, instruments, and data processing, etc. It can solve the problems of slow coordinate positioning, long scanning time, and delayed positioning.

Active Publication Date: 2014-02-12
BEIJING HANWANG PENGTAI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Assuming that there are M receiving coils and N sending coils, according to the above root-by-root scanning method, it is necessary to scan M*N times, and the scanning time is very long. In this way, when the electromagnetic pen is quickly clicked on the antenna board, it is easy to scan due to the long scanning time. The coordinate positioning is slow, resulting in the loss of touch points and delayed positioning

Method used

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  • Electromagnetic touch device and coordinate positioning method thereof
  • Electromagnetic touch device and coordinate positioning method thereof
  • Electromagnetic touch device and coordinate positioning method thereof

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Embodiment 1

[0029] An embodiment of the present invention provides an electromagnetic touch device, such as figure 1 As shown, the electronic touch device includes an electromagnetic pen 11 and an electromagnetic tablet, and the electromagnetic tablet includes an antenna board 12 and a controller 13 .

[0030] The electromagnetic pen 11 is a handwriting input device with a resonant circuit inside, which can generate electromagnetic induction signals after being excited.

[0031] The electromagnetic handwriting board is a device with an antenna board 12 and a controller 13 inside. The electromagnetic pen can move and input in the display effective area of ​​the electromagnetic handwriting board. The electromagnetic handwriting board detects the input of the electromagnetic pen through the antenna board 12 and the controller 13. track.

[0032] In the prior art, M sets of first coils and N sets of second coils are distributed on the antenna board, where M and N are integers greater than 0,...

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Abstract

An embodiment of the invention provides an electromagnetic touch device and a coordinate positioning method thereof and relates to the field of electromagnetic handwriting input. Coordinate positioning speed of an electromagnetic stylus in the electromagnetic touch device can be increased, and the problems of touch point loss and delayed positioning are solved. The method includes: setting a (M+1)-th group of first coils, distributed outside the edge of a display effective region of an electromagnetic writing pad, on an antenna board, closing the (M+1)-th group of first coils, scanning and detecting second coils, and determining that a second coil corresponding to maximum signal amplitude of sensing signals of the second coils detected is a maximum second coil; closing the maximum second coil, scanning and detecting the first coils, acquiring a coil combination of the maximum second coil and the maximum first coil corresponding to the maximum signal amplitude of sensing signals of the first coils, and calculating according to the coil combination to obtain coordinates of the electromagnetic stylus on the electromagnetic writing pad.

Description

technical field [0001] The invention relates to the field of electromagnetic handwriting input, in particular to an electromagnetic touch device and a coordinate positioning method thereof. Background technique [0002] Due to the advantages of high positioning accuracy and high sensitivity, electromagnetic touch technology is favored by the market and is widely used in e-books, handwriting computers, mobile phones and other devices. [0003] The method of determining the coordinate position of the electromagnetic pen in the electromagnetic touch device is roughly as follows: the transmitting coil on the antenna board in the electromagnetic touch device sends out an excitation signal, and the resonant circuit in the electromagnetic pen generates an electromagnetic induction signal after being excited by the excitation signal. The magnetic induction signal is received by the receiving coil on the antenna board vertically distributed to the transmitting coil, and the controlle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/046G06F3/0354
Inventor 李俊峰孙影李擎
Owner BEIJING HANWANG PENGTAI TECH CO LTD
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