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Signal processing method and device

A signal processing and signal technology, applied in the signal field, can solve problems such as inaccurate signal correction

Active Publication Date: 2020-08-25
CHIPONE TECH BEIJINGCO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Embodiments of the present invention provide a signal processing method and device to at least solve the technical problem of inaccurate correction of signals interfered by noise by touch devices in the prior art

Method used

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Embodiment Construction

[0022] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0023] It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate ...

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Abstract

The invention discloses a signal processing method and device. The method comprises: a signal at a specific frequency is sent as a first modulation signal; a second modulation signal that is obtained by processing of the first modulation signal by a coupling capacitor of a touch device is received; an amplitude and a phase of the demodulated second modulation signal are obtained, and a reference signal at a specific frequency is generated based on the amplitude and phase; the second modulation signal is corrected by using the reference signal; and then the corrected signal is demodulated. Therefore, a technical problem that a signal under noise interference can not be corrected by the touch device in the prior art can be solved.

Description

technical field [0001] The present invention relates to the field of signals, in particular to a signal processing method and device. Background technique [0002] In the control device of the touch device, the amplitude modulation method is mainly used to detect the capacitance change caused by the touch. By sending a signal of a specific frequency at the sending end of the device, the sent signal passes through the coupling capacitance of the touch device and then is sent to the receiving end of the device. Received and demodulated by the same frequency signal. The amplitude of the demodulated signal represents the capacitance value of the coupling capacitance of the passing touch device. When the finger touches this place, the size of the coupling capacitance at this place will be changed, so the touch state of the finger at this place can be detected by monitoring the change of the demodulated signal amplitude. [0003] However, when the control device of the touch dev...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/38
CPCH04L27/3854
Inventor 朱博
Owner CHIPONE TECH BEIJINGCO LTD
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