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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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Most existing solutions use analog circuits to detect the strength and frequency of received signals

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

Examples

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[0042] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, a person of ordinary skill in the art can understand that in each embodiment of the present invention, many technical details are proposed in order to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions required by the claims of this application can be realized.

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

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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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