Integrated Key-Touch Interface Using Overlapping Electrodes
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Solution Overview
Problem
Existing technologies lack a multi-functional interface for integrating key and touch input devices, and there is a need for a more efficient and user-friendly interface that integrates key and touch input capabilities in electronic devices.
Innovation Solution
An electronic device with a multi-function human interface that integrates a key input sensor and a touch input sensor, utilizing an electrode layer with overlapping electrodes to generate both key and touch input signals, and a method to switch between operation modes based on touch input location.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate key input device and touch input device are provided, then input functionality is comprehensive, but device volume increases
Solution Approach 1:
The patent combines key input sensor and touch input sensor into a single integrated input device. The key input sensor includes first and second electrodes that can detect both key presses (when both electrodes are contacted) and touch gestures (when only one electrode is contacted), eliminating the need for separate input devices and reducing overall device volume.
Solution Approach 2:
The key input sensor is designed to perform multiple functions: it can detect key input when both first and second electrodes are contacted, and detect touch input when only one electrode is contacted. This multi-functional design allows a single component to replace what would traditionally require separate dedicated devices.
2Adaptability or versatility
If separate key input device and touch input device are provided, then input functionality is comprehensive, but device complexity increases
Solution Approach 1:
The patent merges key input sensor and touch input sensor into one integrated sensor system. The sensor uses a shared electrode structure where the same first and second electrodes serve both key detection and touch detection purposes, simplifying the overall device architecture compared to having separate dedicated sensors.
Solution Approach 2:
The integrated sensor achieves multi-functionality through intelligent signal processing: it distinguishes between key input (both electrodes contacted) and touch input (one electrode contacted) based on the contact pattern, allowing a single sensor structure to handle multiple input types without requiring separate specialized components.
3Volume of moving object
If integrated electrode layer is used, then device volume is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The patent applies different functional characteristics to different regions of the electrode layer. The first and second electrodes are positioned and configured with specific properties (such as the second electrode being disposed at a lower position than the first electrode) to enable distinct detection of key input versus touch input, allowing precise local differentiation of input types through controlled electrode geometry and positioning.
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
The integration of key and touch input sensors enhances user convenience and reduces device volume, allowing for seamless switching between input methods.
Implementation Method 1
a first elastic unit placed corresponding to the first key cap, the first elastic unit including a first conductive material
Implementation Method 2
the second electrode is placed to be at least partially overlapped by the first conductive material of the first elastic unit
Data Source
AI summary
Proposed is an electronic device having a multi-function human interface, the electronic device including a plurality of key caps, wherein the plurality of key caps include a first key cap, a plurality of elastic units, wherein the plurality of elastic units include a first elastic unit, a plurality of conductive materials, wherein the plurality of conductive materials include a first conductive material, and an electrode layer configured to generate key input signals and touch input signals.