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Capacitive touch screen calibration method and capacitive touch device

A capacitive touch screen and touch device technology, which is applied in electrical digital data processing, input/output process of data processing, instruments, etc., can solve problems such as difficulty in accurately defining the ratio of positive and negative values, unstable calibration methods, and miscalibration.

Active Publication Date: 2014-03-26
HUAWEI DEVICE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this calibration method, the ratio of positive and negative values ​​is difficult to define accurately, and the capacitance value of the touch screen may be affected by the presence of conductors or charging equipment around the touch screen, so the calibration method is unstable and may cause miscalibration

Method used

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  • Capacitive touch screen calibration method and capacitive touch device
  • Capacitive touch screen calibration method and capacitive touch device

Examples

Experimental program
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Effect test

Embodiment 1

[0063] An embodiment of the present invention provides a calibration method for a capacitive touch screen, specifically as figure 1 As shown, the method includes:

[0064] 101. When the capacitive touch screen is powered on, the capacitive touch device obtains a temporary reference capacitance value of a touch detection point of the capacitive touch screen.

[0065] Wherein, the temporary reference capacitance value is the sampling capacitance value of the touch detection point acquired by the capacitive touch device every time the capacitive touch screen is powered on. For example, when a mobile phone with a capacitive touch screen is just turned on, the mobile phone will use the sampling capacitance value of the touch detection point at this moment as the temporary reference capacitance value of the touch detection point of the capacitive touch screen.

[0066] 102. The capacitive touch device obtains a first difference between a backup reference capacitance value of the to...

Embodiment 2

[0076] An embodiment of the present invention provides a calibration method for a capacitive touch screen, specifically as figure 2 As shown, the method includes:

[0077] 201. When the capacitive touch screen is powered on, the capacitive touch device obtains a temporary reference capacitance value of a touch detection point of the capacitive touch screen.

[0078] Wherein, the temporary reference capacitance value is the sampling capacitance value of the touch detection point acquired by the capacitive touch device every time the capacitive touch screen is powered on. For example, when a mobile phone with a capacitive touch screen is just turned on, the mobile phone will use the sampling capacitance value of the touch detection point at this moment as the temporary reference capacitance value of the touch detection point of the capacitive touch screen.

[0079] 202. The capacitive touch device obtains a first difference between a backup reference capacitance value of the t...

Embodiment 3

[0115] The embodiment of the present invention also provides a capacitive touch device 30, the capacitive touch screen device 30 includes a capacitive touch screen 31, specifically as image 3 As shown, the touch device 30 further includes a processor 32 .

[0116] The processor 32 is configured to obtain the temporary reference capacitance value of the touch detection point of the capacitive touch screen 31 when the capacitive touch screen 31 is powered on, and the backup reference capacitance value of the touch detection point and the A first difference of differences between temporary reference capacitance values ​​of touch detection points.

[0117] Wherein, the temporary reference capacitance value of the touch detection point is the sampling capacitance value of the touch detection point acquired by the capacitive touch device 30 each time the capacitive touch screen 31 is powered on. For example, when a mobile phone with a capacitive touch screen is just turned on, the...

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Abstract

The embodiment of the invention provides a capacitive touch screen calibration method and a capacitive touch device. Through the method, the standard capacitance value of a capacitive touch screen can be accurately calibrated, and the operation failure on the capacitive touch screen can be prevented. The method includes the first step of obtaining a temporary standard capacitance value of a touch detection point of the capacitive touch screen when the capacitive touch screen is powered on, the second step of obtaining a first difference value of the difference between a backup standard capacitance value of the touch detection point and the temporary standard capacitance value of the touch detection point, and the third step of determining the standard capacitance value of the touch detection point according to the first difference value and a preset first threshold value. The capacitive touch screen calibration method and the capacitive touch device are applicable to the field of touch screen detection.

Description

technical field [0001] The invention relates to the technical field of touch screen detection, in particular to a calibration method for a capacitive touch screen and a capacitive touch device. Background technique [0002] With the development of science and technology, touch screens have gradually replaced mechanical button panels as a new means of human-computer interaction in the field of electronic equipment. Among various types of touch screens, capacitive touch screens are applied to more and more electronic devices due to their better light transmittance, clarity and reliability. [0003] The capacitive touch screen judges whether there is a touch operation based on the capacitance change on the touch screen. Therefore, when the capacitive touch screen is powered on, it must first obtain the reference capacitance value when there is no interference on the capacitive touch screen, and use this reference capacitance value as a reference to detect the capacitance chang...

Claims

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Application Information

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IPC IPC(8): G06F3/044
CPCG06F3/04186G06F3/044
Inventor 刘海龙周锦
Owner HUAWEI DEVICE CO LTD
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