Touch detection method, system and touch control terminal of touch sensor

A technology of touch sensor and touch detection, applied in the input/output process of instruments, data processing, calculation, etc., can solve the problems of reducing the drive, increasing the equipment's impact on the ground area, and the signal-to-noise ratio of the coupling capacitor, and achieving The effect of improving accuracy

Active Publication Date: 2013-03-13
SHENZHEN GOODIX TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The metal shell has the limitation that it must be in contact with the finger, and increasing the device’s ground area has product limitations, and reducing the coupling capacitance of the drive, sensor, and finger will affect the signal-to-noise ratio
Therefore, none of the existing methods can fundamentally solve this problem

Method used

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  • Touch detection method, system and touch control terminal of touch sensor
  • Touch detection method, system and touch control terminal of touch sensor
  • Touch detection method, system and touch control terminal of touch sensor

Examples

Experimental program
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Embodiment 1

[0045] see Figure 6 As shown, it is a flowchart of a touch detection method of a touch sensor according to Embodiment 1 of the present invention. In this embodiment, the detection feature in the self-capacitance mode is used to solve the problem of dismantling points in the floating state in the mutual-capacitance mode, thereby improving user experience. This method comprises the following steps:

[0046] Step S101: Alternately set the touch sensor to a mutual capacitance mode and a self capacitance mode.

[0047] like Figure 7 As shown, the driving and sensing of the mutual capacitance mode and the self capacitance mode are divided into multiple groups to scan and detect the rows and columns of the touch sensor capacitance matrix, and the two are collected alternately between groups. Since it takes a certain amount of time to decode after each group of sampling is completed in the mutual capacitance mode, this interval is used for sampling in the self-capacitance mode. ...

Embodiment 2

[0070] see Figure 11 As shown, it is a structural block diagram of a touch detection system of a touch sensor according to Embodiment 2 of the present invention. In this embodiment, the detection feature in the self-capacitance mode is used to solve the problem of dismantling points in the floating state in the mutual-capacitance mode, thereby improving user experience.

[0071] The touch detection system of the touch sensor provided in this embodiment includes a mutual capacitance sampling unit 1, a mutual capacitance decoding unit 2, a self capacitance sampling unit 3, a self capacitance decoding unit 4, a control unit 5, a mutual capacitance detection and determination unit 6 and a self capacitance package Network analysis unit 7. The mutual capacitance sampling unit 1 is respectively connected with the mutual capacitance decoding unit 2 and the control unit 3 for mutual capacitance signal sampling; the mutual capacitance decoding unit 2 is respectively connected with the...

Embodiment 3

[0074] see Figure 12 As shown, it is a flowchart of a touch detection method of a touch sensor according to Embodiment 3 of the present invention. This embodiment utilizes the detection characteristics in the self-capacitance mode to solve the problem of incorrectly updating the benchmark when the floating point is eliminated in the mutual-capacitance mode. This method comprises the following steps:

[0075] Step S301: Alternately set the touch sensor in a mutual capacitance mode and a self capacitance mode.

[0076] like Figure 7 As shown, the driving and sensing of the mutual capacitance mode and the self capacitance mode are divided into multiple groups to scan and detect the rows and columns of the touch sensor capacitance matrix, and the two are collected alternately between groups. Since it takes a certain amount of time to decode after each group of sampling is completed in the mutual capacitance mode, this interval is used for sampling in the self-capacitance mode...

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Abstract

The invention provides a touch detection method of a touch sensor, which relates to the technical field of touch control. The method comprises the following steps that the touch sensor is set to a mutual capacitance mode and a self-capacitance mode alternately; rows and columns of a capacitance matrix of the touch sensor are scanned and detected; when a touch condition is preliminarily judged as multi-finger touch according to a scanning and detection result in a mutual capacitance mode, data obtained by sampling in the self-capacitance mode is further subjected to envelopment analysis; whether the touch condition in the mutual capacitance mode is single-finger touch or the multi-finger touch is judged; if the touch condition is the single-finger touch, a touch coordinate is output; and if the touch condition is the multi-finger touch, a plurality of touch coordinates are output. The invention also provides a touch detection system and a touch control terminal of the touch sensor. With the adoption of the touch detection method, the touch detection system and the touch control terminal, the accuracy of a touch detection result of the touch sensor, particularly the accuracy of the detection result when the single-finger touch and the multi-finger touch are required to be distinguished during the course that the touch control terminal is subjected to large area touch in a suspension state, is improved.

Description

technical field [0001] The invention relates to the field of touch technology, in particular to a touch detection method of a touch sensor, a touch detection system of a touch sensor and a touch terminal. Background technique [0002] Capacitive touch sensor touch detection technology currently mainly includes mutual capacitance detection and self-capacitance detection. Since the mutual capacitance detection method has the characteristics of multi-touch, it has become the mainstream capacitive touch detection technology, but at the same time, the mutual capacitance detection also has some defects, such as the levitation effect. Suspension means that the touch terminal is placed on the surface of a highly insulating object; non-suspension means that the human body touches the touch terminal or there is a large area of ​​system ground on the touch terminal. The levitation effect refers to the phenomenon that when a larger finger, such as a thumb, is touched, the touch area is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/044
CPCG06F3/044G06F3/041662G06F3/0446
Inventor 戴磊钟镇宇叶金春王浩雷陈小祥
Owner SHENZHEN GOODIX TECH CO LTD
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