Conjoined Side Button Touch Recognition for Pressing and Sliding
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Solution Overview
Problem
Existing piezoelectric ceramic devices in conjoined buttons, such as volume increasing and decreasing buttons, can only recognize a single press vibration function inaccurately and fail to timely recognize up and down sliding touches, limiting their application and promotion.
Innovation Solution
A touch recognition method using at least two transducers and a sensor between them, collecting main and auxiliary touch signals, performing threshold recognition, and determining touch events like sliding and pressing based on these signals, incorporating pressure and piezoelectric sensing modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single piezoelectric ceramic device is used in a conjoined button, then the device structure is simple, but the touch recognition accuracy is poor and cannot distinguish between pressing and sliding actions
Solution Approach 1:
The conjoined button is divided into multiple independent button structures (e.g., volume up and volume down buttons), with each button equipped with its own transducer. This segmentation allows independent signal collection from each button, enabling the system to distinguish between pressing actions on different buttons and sliding actions across buttons, thereby improving touch recognition accuracy without significantly increasing overall device complexity
Solution Approach 2:
A sensor is introduced as an intermediary component between the piezoelectric ceramic transducers and the control unit. This sensor collects additional touch information (such as pressure distribution and contact area) and transmits it to the control unit for comprehensive signal processing. The intermediary sensor enables the system to differentiate between pressing and sliding actions by analyzing the characteristics of touch signals, resolving the contradiction between simple device structure and accurate touch recognition
2Device complexity
If only a single transducer is used, then the device complexity is low, but the ability to recognize sliding actions is insufficient
Solution Approach 1:
Multiple transducers are distributed across different button structures in the conjoined button. Each transducer independently detects pressure changes in its local region. By segmenting the detection function across multiple transducers, the system can identify sliding actions through the pattern of activated transducers and recognize pressing actions through the magnitude of signal changes, thereby enhancing touch action recognition capability
Solution Approach 2:
The system transitions from single-point detection to multi-point spatial detection by deploying transducers at different positions across the conjoined button. This dimensional expansion from one detection point to multiple detection points enables the system to analyze the spatial distribution of touch signals, which is crucial for distinguishing between pressing (localized high pressure) and sliding (distributed pressure) actions
3Ease of manufacture
If adjacent button structures are not properly differentiated, then the manufacturing process is simple, but interference between adjacent buttons occurs during touch recognition
Solution Approach 1:
The conjoined button is segmented into multiple independently addressable button structures, with each button having its own transducer and associated signal processing path. This segmentation allows the control unit to selectively process signals from specific buttons based on touch detection, preventing interference between adjacent buttons. The segmented architecture maintains relatively simple manufacturing while improving signal accuracy by isolating signal paths
Solution Approach 2:
A sensor is positioned between adjacent button structures to detect touch events and determine which button was pressed. This intermediary sensor acts as a mediator that provides spatial information about the touch location, enabling the control unit to correctly identify the intended button and filter out interfering signals from adjacent buttons. The sensor-mediated approach maintains manufacturing simplicity while significantly improving touch signal accuracy
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances touch recognition accuracy for conjoined side buttons by reducing interference from adjacent structures and improving recognition of pressing and sliding actions through collaborative signal processing.
Implementation Method 1
Piezoelectric ceramics are a kind of electronic ceramic materials with piezoelectric properties. Currently, a piezoelectric ceramic device is applied to components such as buttons of electronic products
Implementation Method 2
The at least one sensor is a pressure sensor or a proximity sensor. The main touch signal is a pressure sensing signal collected by the at least one sensor
Data Source
AI summary
Disclosed are a touch recognition method and system for a conjoined side button, and a related device. The conjoined side button includes at least two transducers corresponding to a button structure and at least one sensor arranged between the transducers. The touch recognition method includes: obtaining a main touch signal of the conjoined side button through a sensor; obtaining auxiliary touch signals of the conjoined side button through different transducers; performing threshold recognition on the main touch signal and the auxiliary touch signals obtained by the different transducers, to obtain touch recognition results; and determining preset touch events according to the touch recognition results, and generating corresponding touch data. The touch recognition method disclosed can reduce interference of different adjacent button structures in a solid-state conjoined button to touch recognition, and improve recognition accuracy of touch modes such as pressing and sliding of a solid-state conjoined button structure.