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Method of Alternate Scanning Using Self Capacitance and Mutual Capacitance Sensing to Remove Touch Noise

A capacitive touch and mutual capacitance technology, applied in electrical digital data processing, input/output process of data processing, instruments, etc., can solve problems such as multi-system resources, power consumption, and reduction of touch point detection frequency, etc. Achieve the effect of less system resources, less usage and design

Active Publication Date: 2016-03-09
ORISE TECH CO LTD
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Problems solved by technology

However, because the source of the noise is unknown, this method cannot completely avoid the frequencies that may encounter noise. At the same time, since three driving signals with different frequencies are used, it inevitably consumes more system resources and reduces the detection of touch points. Frequency (ReportRate), and power consumption issues

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  • Method of Alternate Scanning Using Self Capacitance and Mutual Capacitance Sensing to Remove Touch Noise
  • Method of Alternate Scanning Using Self Capacitance and Mutual Capacitance Sensing to Remove Touch Noise
  • Method of Alternate Scanning Using Self Capacitance and Mutual Capacitance Sensing to Remove Touch Noise

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Embodiment Construction

[0044] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0045] The present invention is a method for removing touch noise by alternately scanning self-capacitance and mutual-capacitance induction, which is used in a capacitive multi-touch system, Figure 10 is a block diagram of the capacitive multi-touch system 100, Figure 11 It is a flow chart of a method for removing touch noise by alternately scanning self-capacitance and mutual-capacitance sensing according to the present invention. like Figure 10 As shown, the capacitive multi-touch system 100 includes a capacitive touch panel 110 , a first driving and sensing device 120 , a second driving and sensing device 130 and a control device 140 .

[0046] The capacitive touch panel 110 has m first conductor lines 112 distributed in the first direction...

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Abstract

The invention provides a method for removing touch noise through self-capacitance and mutual-capacitance induction alternate scanning. The method comprises the following steps that a control device initializes a first driving sensing device and a second driving sensing device and sets the first driving sensing device and the second driving sensing device to be in a first work mode so as to perform self-induction capacitance driving sensing on a touch panel for at least one time and then find a first possible touch range, the control device sets the first driving sensing device and the second driving sensing device to be in a second work mode so as to perform mutual-induction capacitance driving sensing on the touch panel for at least one time and then find a second possible touch range, and the control device judges whether the first possible touch range and the second possible touch range have an intersection, if so, a possible touch range intersection is generated and then coordinates of a touch point are calculated.

Description

technical field [0001] The invention relates to the technical field of touch panels, in particular to a method for removing touch noise by alternately scanning self-capacitance and mutual-capacitance induction. Background technique [0002] The technical principle of the touch panel is that when a finger or other medium touches the screen, according to different sensing methods, it detects voltage, current, sound waves or infrared rays, etc., and then measures the coordinate position of the touch point. For example, the resistive touch panel utilizes the potential difference between the upper and lower electrodes to calculate the position of the pressure point to detect the location of the touch point. The capacitive touch panel uses the capacitance change generated by the electrostatic bonding between the arranged transparent electrodes and the human body, and detects its coordinates from the generated current or voltage. [0003] When calculating the coordinates of the ex...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/044
Inventor 黄鑫茂游翔钲龚至宏黄世新
Owner ORISE TECH CO LTD
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