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
View PDF4 Cites 64 Cited by
  • 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 scree

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Capacitive touch screen calibration method and capacitive touch device
  • Capacitive touch screen calibration method and capacitive touch device
  • Capacitive touch screen calibration method and capacitive touch device

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0062] Example one

[0063] The embodiment of the present invention provides a method for calibrating 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 the backup reference capacitance ...

Example Embodiment

[0075] Embodiment two

[0076] The embodiment of the present invention provides a method for calibrating 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 the backup reference capacita...

Example Embodiment

[0114] Embodiment three

[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 also 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 The first difference between the temporary reference capacitance values ​​of the touch detection point.

[0117] 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 every time the capacitive touch screen 31 is powered on. For example, when a mobile phone with a capacitive touch screen is just turned on, t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G06F3/044
CPCG06F3/04186G06F3/044
Inventor 刘海龙周锦
Owner HUAWEI DEVICE CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap