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Electromagnetic touch receiving device and electromagnetic touch receiving method

An electromagnetic touch and receiving device technology, applied in electrical components, electrical digital data processing, instruments, etc., can solve the problems of anti-interference and poor receiving performance, and achieve the effect of improving detection performance, anti-interference and receiving performance

Active Publication Date: 2014-07-02
TELINK SEMICON SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most existing solutions use analog circuits to detect the strength and frequency of received signals when receiving touch signals, and the anti-interference and receiving performance are relatively poor.

Method used

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  • Electromagnetic touch receiving device and electromagnetic touch receiving method
  • Electromagnetic touch receiving device and electromagnetic touch receiving method
  • Electromagnetic touch receiving device and electromagnetic touch receiving method

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Embodiment Construction

[0042] In order to make the object, technical solution and advantages of the present invention clearer, various embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. However, those of ordinary skill in the art can understand that, in each implementation manner of the present invention, many technical details are provided for readers to better understand the present application. However, even without these technical details and various changes and modifications based on the following implementation modes, the technical solution claimed in each claim of the present application can be realized.

[0043] The first embodiment of the present invention relates to an electromagnetic touch receiving device. Aiming at the poor performance of receiving touch signals of existing analog circuits, the present invention proposes a receiving architecture based on digital baseband signal processing, which is suitable for large-sca...

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Abstract

The invention relates to the field of electromagnetic touch and discloses an electromagnetic touch receiving device and an electromagnetic touch receiving method. An annular antenna is coupled to receive an electromagnetic signal sent by an electromagnetic pen so as to obtain an analog receiving signal; the analog receiving signal is filtered to be converted into a digital signal, and frequency and energy of the digital signal are estimated to enable the electromagnetic touch receiving device to adopt an advanced digital signal processing method for precisely calculating energy and frequency information relevant to a touch signal, and anti-interference and receiving performances of the electromagnetic touch receiving device are improved.

Description

technical field [0001] The invention relates to the field of electromagnetic touch, in particular to an electromagnetic touch receiving device and method. Background technique [0002] Touch technology is used as an input control in many products. With the popularization of smartphones and tablet computers, the application of touch technology is more extensive. These devices usually do not have external input devices such as keyboards and mice because of their portability and size limitations. Touch input is a natural A convenient input method has a powerful appeal. There are also various classifications of touch input technologies, among which touch pen input is an important application. Using the stylus, users can directly perform handwriting input on the device, and can also simulate mouse operations, etc. Stylus input devices are usually based on electromagnetic radiation technology, such as figure 1 As shown, in devices such as smartphones, tablet computers, and tab...

Claims

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Application Information

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IPC IPC(8): G06F3/046H04L25/02H04L27/00
Inventor 金海鹏杨中奇盛文军
Owner TELINK SEMICON SHANGHAI
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