Touchscreen interference suppression method and apparatus, and terminal device
First Claim
Patent Images
1. A method, comprising:
- detecting whether a wideband interference signal exists in a received signal on a receive electrode of a touchscreen, wherein the touchscreen is in an untouched state while detecting whether the wideband interference signal exists in the received signal;
in response to detecting that the wideband interference signal exists in the received signal on the receive electrode, reducing a detection bandwidth of a band-pass filter from a first detection bandwidth to a second detection bandwidth, wherein the second detection bandwidth is determined according to a current operating frequency of the touchscreen and a frequency range of the detected wideband interference signal, and wherein the detection bandwidth of the band-pass filter is a bandwidth that the band-pass filter will allow to pass, and the band-pass filter is configured to filter out other signals having frequencies that are outside of the detection bandwidth of the band-pass filter; and
determining whether a touch action exists in another received signal, wherein the another received signal has been filtered by the band-pass filter using the second detection bandwidth.
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Abstract
This application provides a touchscreen interference suppression method and apparatus, and a terminal device. In the method, when a touchscreen is in an untouched state, whether a wideband interference signal exists in the touchscreen is detected; and when the wideband interference signal exists, a detection bandwidth of a filter unit is reduced.
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Citations
21 Claims
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1. A method, comprising:
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detecting whether a wideband interference signal exists in a received signal on a receive electrode of a touchscreen, wherein the touchscreen is in an untouched state while detecting whether the wideband interference signal exists in the received signal; in response to detecting that the wideband interference signal exists in the received signal on the receive electrode, reducing a detection bandwidth of a band-pass filter from a first detection bandwidth to a second detection bandwidth, wherein the second detection bandwidth is determined according to a current operating frequency of the touchscreen and a frequency range of the detected wideband interference signal, and wherein the detection bandwidth of the band-pass filter is a bandwidth that the band-pass filter will allow to pass, and the band-pass filter is configured to filter out other signals having frequencies that are outside of the detection bandwidth of the band-pass filter; and determining whether a touch action exists in another received signal, wherein the another received signal has been filtered by the band-pass filter using the second detection bandwidth. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A terminal device, comprising:
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a touchscreen; a pulse generation circuit; an amplifier; an analog-to-digital converter; and a processor; wherein an output end of the pulse generation circuit is connected to a drive electrode of the touchscreen, an input end of the amplifier is connected to a receive electrode of the touchscreen, an input end of the analog-to-digital converter is connected to an output end of the amplifier, and an output end of the analog-to-digital converter is connected to the processor; wherein the pulse generation circuit is configured to generate a pulse signal required for the touchscreen to operate, and send out the pulse signal by using the drive electrode of the touchscreen; wherein the receive electrode of the touchscreen is configured to receive a received signal, the received signal comprising the pulse signal; wherein the amplifier is configured to amplify the received signal; wherein the analog-to-digital converter is configured to perform analog-to-digital conversion on the received signal; and wherein the processor is configured to; detect whether a wideband interference signal exists in the received signal on the receive electrode, wherein the touchscreen is in an untouched state while detecting whether the wideband interference signal exists in the received signal; in response to detecting that the wideband interference signal exists in the received signal on the receive electrode, reduce a detection bandwidth of a band-pass filter from a first detection bandwidth to a second detection bandwidth, wherein the second detection bandwidth is determined according to a current operating frequency of the touchscreen and a frequency range of the detected wideband interference signal, and wherein the detection bandwidth of the band-pass filter is a bandwidth that the band-pass filter will allow to pass, and the band-pass filter is configured to filter out other signals having frequencies that are outside of the detection bandwidth of the band-pass filter; and determine whether a touch action exists in another received signal, wherein the another received signal has been filtered by the band-pass filter using the second detection bandwidth. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A non-transitory computer-readable storage medium storing a program to be executed by a processor, the program including instructions for:
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detecting whether a wideband interference signal exists in a received signal on a receive electrode of a touchscreen, wherein the touchscreen is in an untouched state while detecting whether the wideband interference signal exists in a received signal; in response to detecting that the wideband interference signal exists in the received signal on the receive electrode, reducing a detection bandwidth of a band-pass filter from a first detection bandwidth to a second detection bandwidth, wherein the second detection bandwidth is determined according to a current operating frequency of the touchscreen and a frequency range of the detected wideband interference signal, wherein the detection bandwidth of the band-pass filter is a bandwidth that the band-pass filter will allow to pass, and the band-pass filter is configured to filter out other signals having frequencies that are outside of the detection bandwidth of the band-pass filter; and determining whether a touch action exists in another received signal, wherein the another received signal has been filtered by the band-pass filter using the second detection bandwidth. - View Dependent Claims (21)
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Specification