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Piezo sensor element detection

A piezoelectric sensor, component technology, applied in the field of touch user interface, can solve the problem of insufficient reliable touch detection method and so on

Active Publication Date: 2022-05-10
AITO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for keypads with multiple touch switches, there is no sufficiently reliable and fast touch detection method

Method used

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  • Piezo sensor element detection
  • Piezo sensor element detection
  • Piezo sensor element detection

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Embodiment Construction

[0064] The detailed description provided below in conjunction with the accompanying drawings is intended to describe the embodiments, and is not intended to mean that the embodiments can only be constructed in these forms or can only be used in these forms. However, the same or equivalent functions and structures can be realized by different embodiments.

[0065]Therefore, in order to reliably detect and identify the signals generated by the piezoelectric sensor elements, it may be necessary to have a certain degree of multi-row and multi-column matrix detection circuit to reduce wiring complexity and energy consumption. In addition, when touch detection of each piezoelectric sensor element is not required, it may be desirable to be able to keep the detection circuit in a low-power mode during the inactive phase of the user interface, and wake up the user interface when it is required to switch the user interface to the active phase. In this way, the energy accumulated by the piez...

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Abstract

Detection of piezoelectric sensor elements is provided. According to a first aspect, an apparatus comprises: a matrix of piezoelectric sensor elements comprising rows of piezoelectric sensor elements and columns of piezoelectric sensor elements; a measurement circuit configured to detect at least one touch, wherein the measurement circuit is configured in a plurality of rows and a plurality of columns; and a wake-up trigger configured to detect at least one touch and further configured to trigger the matrix into an operational mode when the at least one touch is detected. The device is configured to detect press events of multiple piezoelectric sensor elements, eg, using only a single activity detection and touch recognition circuit. Can reduce complexity and energy consumption.

Description

Technical field [0001] The present application relates generally to touch user interfaces of electronic devices, and more particularly, to piezoelectric sensing of touch user interfaces. technical background [0002] For touch user interface, touch sensing can be divided into two stages: first, detecting whether the interface is touched, and second, identifying whether the touch event is pressing, swiping or any kind of action made by the user. Such a touch user interface can be implemented using piezoelectric sensor elements, each of which corresponds to a discrete touch point of the user interface. In the simplest case, each piezoelectric sensor element can correspond to a touch switch. In many user interfaces, multiple discrete touch switches or touch points are required, for example, up to 100 or more for QWERTY keyboards. [0003] Now, in touch user interface, if the electrical signals of many piezoelectric sensor elements are monitored for touch detection, one configuration...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/041H03K17/96
CPCH03K17/9643H03K2217/0036G06F3/04144G06F3/04166G06F2203/04104
Inventor T·科斯基-贾斯卡里J·里希亚霍
Owner AITO