Pressure Sensor Input Control for Versatile Sealed Interfaces
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Solution Overview
Problem
Conventional physical input controls on electronic devices are limited in providing multiple types of inputs and are susceptible to wear and tear, especially in water-resistant devices where robust sealing is necessary, limiting their versatility and durability.
Innovation Solution
Incorporating a pressure sensor within a sealed or quasi-sealed volume of the input control to characterize user inputs by measuring pressure changes, which can distinguish different types and degrees of input, and optionally using a microphone for audio detection, combined with haptic feedback components to verify control inputs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional push buttons are used to provide physical input, then the device structure remains simple, but the number of input types is limited and sealing complexity increases
Solution Approach 1:
The patent applies multi-functionality by enabling a single physical input control to perform multiple input types through pressure sensing technology. The pressure sensor detects different pressure levels, contact areas, and contact durations to distinguish between various input gestures (e.g., light press, hard press, long press, circular motion), allowing one button to replace multiple conventional buttons and provide diverse input options without increasing sealing complexity
Solution Approach 2:
The patent replaces traditional mechanical switch mechanisms with a pressure sensor-based detection system. Instead of using multiple mechanical buttons with separate sealing requirements, the invention uses a single pressure-sensitive element that electronically detects different input types through pressure variations, thereby reducing mechanical complexity and sealing requirements while increasing input versatility
2Reliability
If conventional buttons are used in water-resistant devices, then structural simplicity is maintained, but durability and wear resistance are reduced
Solution Approach 1:
The patent replaces wear-prone mechanical switch components with a solid-state pressure sensor that has no moving parts. This electronic sensing mechanism eliminates contact wear, corrosion, and mechanical failure modes associated with conventional buttons, significantly improving durability and reliability in harsh environments including water-resistant applications
Solution Approach 2:
The patent changes the detection parameter from mechanical position or click state to continuous pressure measurement. By monitoring pressure magnitude, pressure rate of change, and pressure duration, the system achieves more reliable input detection that is insensitive to environmental factors like moisture, temperature, and physical wear, thereby improving reliability without requiring complex protective structures
3Adaptability or versatility
If pressure sensors are integrated into input controls, then input versatility is enhanced, but device complexity increases
Solution Approach 1:
The patent achieves input versatility through a unified pressure sensor platform that detects multiple input types (press depth, contact area, duration, motion patterns) using a single sensor element. This approach provides diverse input functionality without requiring multiple specialized sensors or complex mechanical structures, thereby enhancing adaptability while minimizing the increase in device complexity
Solution Approach 2:
The patent combines multiple input detection functions into a single integrated pressure sensing system. Instead of using separate sensors for different input types, the invention merges press detection, gesture recognition, and force measurement into one pressure sensor that captures all input information through continuous pressure monitoring, simplifying the overall system architecture
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 the flexibility and durability of physical input controls by allowing multiple input types and providing tactile feedback, reducing errors and improving user experience, especially in harsh environmental conditions.
Implementation Method 1
the pressure sensor being configured to characterize a pressure change within the interior volume resulting from movement of the input control
Data Source
AI summary
An input control for controlling various features of an electronic device is described. The input control can be positioned along an exterior surface of the electronic device and cover an opening leading into the electronic device. A pressure sensor can then be positioned within the electronic device and adjacent to the covered opening. The pressure sensor is able to measure a pressure of a volume of air positioned between the pressure sensor and the input control. When movement of the input control changes the pressure of the volume of air, the sensor readings from the pressure sensor can be used to register a user input. The input control can take many forms including rocker buttons, slider switches and input regions.