Signal processing method, device, storage medium and processor

A signal processing and position information technology, applied in the control field, can solve the problem of low demodulation accuracy of the active pen, and achieve the effect of increasing the demodulation order, increasing the sampling length, and solving the low demodulation accuracy

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

[0005] The main purpose of the present invention is to provide a signal processing method, device, storage medium and processor, to at least solve the problem of low demodulation accuracy of the active pen

Method used

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  • Signal processing method, device, storage medium and processor
  • Signal processing method, device, storage medium and processor
  • Signal processing method, device, storage medium and processor

Examples

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Embodiment 1

[0033] An embodiment of the present invention provides a signal processing method.

[0034] figure 1 is a flowchart of a signal processing method according to an embodiment of the present invention. like figure 1 As shown, the method includes the following steps:

[0035] Step S102, in the first scan mode, scan multiple buffers corresponding to the first scan mode to obtain the first sampling data of the active pen.

[0036] In the technical solution provided in the above step S102 of the present application, in the first scanning mode, multiple buffers corresponding to the first scanning mode are scanned to obtain the first sampling data of the active pen, wherein the multiple buffers are used to store The first sampling data, the first sampling data includes the pressure information of the active pen, and the sampling length of the first sampling data is greater than the target sampling length.

[0037] In this embodiment, the first scan mode can be an analog-to-digital ...

Embodiment 2

[0079] The signal processing method of the embodiment of the present invention will be illustrated below with reference to preferred embodiments.

[0080] The overall process of active pen pressure analysis, the core of which is the cyclic buffer scanning algorithm and pressure demodulation algorithm, the whole process consists of two parts: the first part is to perform coordinate detection, through self-capacitance scanning to detect the position information of the hand and the active pen, mutual Capacitance scanning is used to detect the coordinates of the hand, and self-contained scanning detects the coordinates of the pen; the second part is pressure detection, which can obtain sine wave data through three scans in ADC Test mode (the circular Buffer scanning algorithm is used here), and the pressure solution is used The tuning algorithm analyzes the pressure information based on the sine wave data.

[0081] figure 2 is a flowchart of another signal processing method acco...

Embodiment 3

[0136] The embodiment of the present invention also provides a signal processing device. It should be noted that the signal processing apparatus in this embodiment may be used to execute the signal processing method in the embodiment of the present invention.

[0137] Figure 7 is a schematic diagram of a signal processing device according to an embodiment of the present invention. like Figure 7 As shown, the device includes: a scanning unit 10 and a demodulation unit 20 .

[0138] The scanning unit 10 is configured to scan a plurality of buffers corresponding to the first scanning mode in the first scanning mode to obtain first sampling data of the active pen, wherein the plurality of buffers are used to store the first sampling data. A sampling data includes the pressure information of the active pen, and the sampling length of the first sampling data is greater than the target sampling length.

[0139] The demodulation unit 20 is configured to perform pressure demodula...

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PUM

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Abstract

The invention discloses a signal processing method, a signal processing device, a storage medium and a processor. The method comprises the following steps of: in a first scanning mode, scanning a plurality of buffer zones corresponding to the first scanning mode, thereby obtaining first sample data of an active pen, wherein the plurality of buffer zones are used for storing the first sample data,the first sample data comprise pressure information of the active pen, and a sampling length of the first sample data is greater than a target sampling length; and performing pressure demodulation forthe first sampling data according to peak data of the first sample data, and thereby obtaining a pressure frequency of the active pen. Through the signal processing method, the signal processing device, the storage medium and the processor, an effect of improving demodulation precision of the active pen is realized.

Description

technical field [0001] The present invention relates to the field of control, in particular, to a signal processing method, device, storage medium and processor. Background technique [0002] At present, the touch IC is usually used for self-capacitance detection mode, and the coordinate calculation and pressure analysis of the active pen are realized through software algorithms. However, due to the limited space of Random Access Memory (RAM) and the limited sampling rate, it is impossible to collect enough analog-to-digital converter (Analog-to-Digital Converter) , referred to as ADC) data, therefore, the existing pressure detection algorithm has the problems of few demodulation orders and low precision. [0003] In addition, because there is no suitable software demodulation algorithm and filtering algorithm, the existing pressure detection algorithm has the problem of large demodulation error, which leads to the problem of low demodulation accuracy of the active pen. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M1/12
CPCH03M1/1245
Inventor 冯鹏斐
Owner CHIPONE TECH BEIJINGCO LTD
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