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Capacitive touch sensor and method for operating capacitive touch sensors

一种电容触摸、电容器的技术，应用在仪器、电子开关、电气元件等方向，能够解决电容触摸传感器无法区分手指触摸和其他非触摸刺激等问题

Active Publication Date: 2019-07-30
SEMICON COMPONENTS IND LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem solved by the present invention is that conventional capacitive touch sensors cannot distinguish between finger touch and other non-touch stimuli (such as water)

Method used

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  • Capacitive touch sensor and method for operating capacitive touch sensors
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  • Capacitive touch sensor and method for operating capacitive touch sensors

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Embodiment Construction

[0030] The inventive technique may be described in terms of functional block components and circuit diagrams. Such functional blocks and circuit diagrams may be realized by any number of components configured to perform the specified functions and achieve various results. For example, the present technology may employ various types of analog-to-digital converters, capacitors, amplifiers, power sources, etc., which may perform a wide variety of functions. Methods and apparatus for capacitive touch sensors according to various aspects of the present technology can operate in conjunction with any electronic system, such as automotive systems, security systems, entry systems, and the like.

[0031] refer to figure 1 , in various embodiments of the present technology, capacitive touch sensor 100 may detect an object, such as a human fingertip, by measuring changes in the capacitance and / or digital output of capacitive touch sensor 100 . For example, capacitive touch sensor 100 ma...

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Abstract

The present invention relates to a capacitive touch sensor and a method for operating the capacitive touch sensor. The technical problem solved by the present invention is that conventional capacitivetouch sensors cannot distinguish between finger touches and other non-touch stimuli (such as water). The capacitive touch sensor may comprise a plurality of drive electrodes and a reception electrode, wherein two capacitors are formed. Under various conditions, the capacitive touch sensor may be configured to trigger a touch event in the presence of a human finger and trigger a non-touch event inthe presence of water. The technical effect achieved by the present invention is to provide the capacitive touch sensor capable of distinguishing between finger touch and water.

Description

technical field [0001] The present invention relates to capacitive touch sensors and methods for operating capacitive touch sensors. Background technique [0002] Mutual capacitance touch sensors operate by detecting and / or measuring the capacitance of a capacitive sensing element and detecting and / or measuring a change in capacitance indicative of the touch or presence of a conductive object. When a conductive object (eg, finger, water) approaches and / or makes contact with a capacitive sensing element, a change in capacitance and the conductive object are detected. A circuit may be utilized to measure the change in capacitance of the capacitive touch sensing element, and the circuit may convert the measured capacitance of the capacitive sensing element to a voltage and / or a digital value to represent a touch event and alternatively a non-touch event (no touch ). [0003] However, in many conventional systems, the presence of water on a capacitive touch sensor may trigger ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/044
CPCG06F3/044G06F3/0418H03K17/962H03K2217/960775H03K2217/960745G06F3/03547G06F2203/04112G06F3/016
Inventor 德永哲也太田垣贵康后藤贤介
Owner SEMICON COMPONENTS IND LLC