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A method and device for optimizing signal-to-noise ratio parameters

A signal-to-noise ratio and parameter technology, applied in the field of optimizing the signal-to-noise ratio parameter, can solve the problems of low touch action accuracy and low signal-to-noise ratio parameter value, and achieve the effect of improving the accuracy and improving the signal-to-noise ratio parameter.

Active Publication Date: 2017-11-14
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the inventors of the present application found in the testing process that the value of the signal-to-noise ratio parameter calculated by using the standard deviation algorithm, the root mean square algorithm or the peak-to-peak algorithm is relatively low, so that the accuracy of the touch screen recognition touch action is relatively low. Low

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  • A method and device for optimizing signal-to-noise ratio parameters
  • A method and device for optimizing signal-to-noise ratio parameters
  • A method and device for optimizing signal-to-noise ratio parameters

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Embodiment 1

[0035] see figure 1 , the method for optimizing the signal-to-noise ratio parameter provided by the embodiment of the present invention includes:

[0036] Step 101, acquiring the capacitance signal when the touch screen is not touched and the capacitance signal when the touch screen is touched; wherein, the capacitance signal when the touch screen is not touched mainly includes noise signals, and the capacitance signal when the touch screen is touched mainly includes noise signals and Touch the corresponding operating signal.

[0037] Step 102: Filter the capacitive signal when the touch screen is not touched to obtain a first filtered capacitive signal; wherein, the capacitive signal when the touch screen is not touched can be input into the filter for filtering, and the filtered touch screen is not The capacitance signal when touched is used as the first filtered capacitance signal.

[0038] Step 103: Filter the capacitive signal when the touch screen is touched to obtain ...

Embodiment 2

[0044] Preferably, in order to further remove the tip noise in the capacitive signal when the touch screen is not touched and the tip noise in the capacitive signal when the touch screen is touched, a bandpass filter is used for filtering in the embodiment of the present invention. In the embodiment On the basis of one, step 102 can be refined into step 1021, and step 103 can be refined into step 1031; therefore, please refer to figure 2 ,include:

[0045] Step 1021, use a band-pass filter to filter the capacitance signal when the touch screen is not touched, and obtain the first filtered capacitance signal; wherein, the band-pass signal can be set according to the desired touch screen performance set in advance. The bandpass frequency range of the filter can filter out the sharp noise, reduce the influence of the noise on the SNR parameter to a certain extent, and then increase the value of the SNR parameter.

[0046] Step 1031 , using a band-pass filter to filter the capac...

Embodiment 3

[0048] On the basis of Embodiment 1, how to calculate and obtain the average value of the first filter capacitor signal and the average value of the second filter capacitor signal will be described in detail below, please refer to Figure 4 , step 104 can be refined into step 1041-step 1043, including:

[0049] Step 1041, within a single cycle, respectively sample the first filter capacitor signal and the second filter capacitor signal to obtain a plurality of sampling points of the first filter capacitor signal and a plurality of sampling points of the second filter capacitor signal Multiple sampling points.

[0050] Step 1042, calculate the average value of multiple sampling points of the first filter capacitor signal in a single cycle, and use the average value of multiple sample points of the first filter capacitor signal as the average value of the first filter capacitor signal; Note that if image 3 shown, because the maximum value of the first filter capacitor signal ...

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Abstract

The present disclosure discloses a method and a device of optimizing a SNR parameter. The method of optimizing the SNR parameter comprises: obtaining a capacitance signal of a touch screen without being touched and a capacitance signal of the touch screen being touched, respectively; filtering the capacitance signal of the touch screen without being touched to obtain a first filtered capacitance signal; filtering the capacitance signal of the touch screen being touched to obtain a second filtered capacitance signal; calculating an average value of the first filtered capacitance signal in a single period and an average value of the second filtered capacitance signal in the single period; compensating the average value of the first filtered capacitance signal or the average value of the second filtered capacitance signal; and determining the SNR parameter, according to a ratio of the compensated average value of the second filtered capacitance signal to the average value of the first filtered capacitance signal, or according to a ratio of the average value of the second filtered capacitance signal to the compensated average value of the first filtered capacitance signal. The method and the device of optimizing the SNR parameter are used for optimizing the SNR parameter applied to a touch screen, solving a problem of low accuracy of identifying a touch action by the touch screen.

Description

technical field [0001] The invention relates to the technical field of touch screens, in particular to a method and device for optimizing signal-to-noise ratio parameters. Background technique [0002] At present, with the development of touch screen technology, more and more electronic devices are equipped with touch screens. When the user's fingers touch the touch screen, the touch screen will receive noise signals in addition to the operation signals of the user's fingers; the signal-to-noise ratio parameter Indicates the ratio of the operating signal to the noise signal in the touch screen. Therefore, when evaluating the performance of the touch screen, the signal-to-noise ratio parameter is one of the important indicators. The higher the value of the signal-to-noise ratio parameter, the touch screen using the signal-to-noise ratio parameter recognizes touch. The higher the precision of the movement. In the prior art, the drive integrated circuit (Integrated circuit, he...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/044
CPCG06F3/04182G06F3/044
Inventor 刘丽娜张光均
Owner BOE TECH GRP CO LTD
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