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Noise sensing circuit and touch device

A technology of noise sensing and touch device, which is applied in electrical digital data processing, instruments, computing, etc., can solve the problem of inability to reduce the impact of charger noise, inability to clearly distinguish display noise from charger noise, and inability to effectively detect Charger noise spectrum and other issues

Active Publication Date: 2022-02-15
SHENZHEN GOODIX TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing technology has developed a noise detection technology that can detect the noise spectrum. However, the energy of the noise of the display screen is usually greater than the noise of the charger, and the existing technology cannot clearly distinguish the noise of the display screen from the noise of the charger, so that the existing noise detection technology Inability to efficiently detect the spectrum of charger noise and reduce the impact of charger noise on overall performance

Method used

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  • Noise sensing circuit and touch device
  • Noise sensing circuit and touch device
  • Noise sensing circuit and touch device

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Embodiment Construction

[0027] In order to make the objects, technical solutions and advantages of the present application, the present application will be described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended to explain the present application and is not intended to limit the present application.

[0028] Please refer to figure 1 and figure 2 , figure 1 A schematic diagram of a noise sensing circuit 10 for the embodiment of the present application, figure 2 A schematic diagram of a touch device 20 for the embodiment of the present application. The touch device 20 includes a plurality of receiving electrodes rx_1 to rx_n, a display screen 22, and a noise sensing circuit 10, and the receiving electrodes rx_1 to rx_n are set to the display screen 22 or integrated into the display screen for the external object. Touch the output touch induction signal, the noise sensing circuit 10 is coupled to ...

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Abstract

A noise sensing circuit (10), wherein the noise sensing circuit (10) includes a first filter (12) coupled to a plurality of receiving electrodes (RX_1, RX_2...RX_N) for receiving corresponding A plurality of received signals (x 1 ’…x N ’), and for the multiple received signals (x 1 ’…x N ') perform a high-pass filtering operation or a band-pass filtering operation to generate a filtering result; a downsampling unit (14), coupled to the first filter (12), is used to perform a downsampling on the filtering result Sampling operation to generate a downsampling result; and a noise detection unit (16), coupled to the downsampling unit (14), used to determine a first threshold of the touch device (20) according to the downsampling result - Operating frequency.

Description

Technical field [0001] The present application relates to a noise sensing circuitry and a touch device, and more particularly to a noise sensing circuit and a touch device that enables the noise generated by the display. Background technique [0002] With the increasing progress of technology, the operational interfaces of various electronic products have gradually been humanized in recent years. For example, through the touch panel, the user can operate directly on the screen directly, enter message / text / pattern, save the use of keyboard or buttons such as input devices. In fact, the touch screen is typically consisting of a sensing panel and a display provided behind the induction panel. The electronic device determines the intention of the touch according to the position that the user touches on the induction panel, and the screen presented in the display, and performs the corresponding operation result. [0003] In detail, the touch screen is mainly affected by the noise ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/044
CPCG06F3/044G06F3/0418G06F3/0412
Inventor 梁颖思文亚南
Owner SHENZHEN GOODIX TECH CO LTD