Touchscreen Interference Suppression Method and Apparatus, and Terminal Device
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0 Petitions
Accused Products
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.
8 Citations
29 Claims
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1-17. -17. (canceled)
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18. 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; and in response to the wideband interference signal existing 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. - View Dependent Claims (19, 20, 21, 22)
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23. 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; and in response to the wideband interference signal existing 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. - View Dependent Claims (24, 25, 26, 27, 28)
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29. A computer-readable storage medium, wherein the computer-readable storage medium stores program code that can be executed by a processor, and the program code enables the processor to perform the following operations:
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detect 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; and in response to the wideband interference signal existing 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.
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Specification