Strain Gauge Speaker Interface With Dynamic LED Button Icons

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Solution Overview

Problem

Existing electronic devices with speakers lack intuitive and dynamic user input methods that can seamlessly adjust device operations based on user input, such as force measurements.

Innovation Solution

The integration of an array of strain gauges and light-emitting diodes in electronic devices, where the light-emitting diodes display dynamically adjustable button icons overlapping the strain gauges, allowing force measurements to adjust speaker output and other device operations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If traditional buttons or switches are used for user input, then device operations can be controlled, but the user interface lacks intuitiveness and dynamic adjustability

Engineering Contradiction:

Improveuser interface intuitivenessVSAvoiddynamic control adjustment

Core Design Contradiction:

Ease of operationVSAdaptability or versatility

Solution Approach 1:

The patent implements a flexible membrane with strain gauges that dynamically detects force applied at different locations and intensities. The light-emitting diodes dynamically display button icons that can change based on detected force, creating an adaptive interface that responds to user input in real-time rather than using static buttons

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent replaces traditional mechanical buttons and switches with a force-sensitive flexible membrane coupled to strain gauges. This substitution allows for more nuanced force measurement and dynamic response, enabling the interface to adapt to different user inputs beyond simple on/off states

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Adaptability or versatility

If strain gauges are integrated to detect force input, then dynamic control is enabled, but device complexity increases

Engineering Contradiction:

Improveforce-based controlVSAvoidsensor integration

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent combines multiple functions into a single integrated assembly: the flexible membrane serves as both the user interface surface and the structural element for force detection, while strain gauges are embedded within or coupled to the membrane to directly measure applied force. This merging reduces the need for separate components and simplifies the overall system architecture

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The flexible membrane with embedded strain gauges serves multiple functions: it acts as the visible surface for users, the structural element for force detection, and the interface for controlling multiple device operations. The light-emitting diodes also serve multiple purposes by displaying button icons and providing visual feedback, reducing the need for separate indicator components

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Ease of operation

If light-emitting diodes display button icons overlapping strain gauges, then visual feedback and control are enhanced, but manufacturing precision requirements increase

Engineering Contradiction:

Improvevisual feedbackVSAvoidcomponent alignment

Core Design Contradiction:

Ease of operationVSManufacturing precision

Solution Approach 1:

The patent divides the interface into discrete functional zones where strain gauges are positioned at specific locations corresponding to where force should be applied. Light-emitting diodes are segmented and positioned to display button icons that align with these zones. This segmentation allows for modular assembly and reduces the need for high-precision alignment of all components simultaneously

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The flexible membrane acts as an intermediary layer between the strain gauges and the external environment. It provides a uniform surface for force application and can be designed with visual indicators or patterns that guide users to the correct pressing locations, reducing the need for precise alignment of underlying components

Inventive Principle:

Principle #24Intermediary (Mediator)

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

This solution enables intuitive device operation by allowing users to control device parameters like speaker volume through force input, enhancing user interaction and device responsiveness.

Implementation Method 1

The strain gauges may measure applied force to the button icons

Methodology Applied

Scientific EffectStrain gauge measurement: Piezoresistive Effect

Implementation Method 2

the light-emitting diodes may be configured to display dynamically adjustable button icons

Methodology Applied

Scientific EffectLight-emitting diode emission: Light Emitting Diode

Data Source

PatentUS12236066B2Electronic devices with strain gauges and light sources

Publication Date: 2025.02.25 APPLE INC

AI summary

An electronic device such as a voice-controlled speaker may have an array of strain gauges and light-emitting diodes. The light-emitting diodes may be configured to display dynamically adjustable button icons overlapping the strain gauges. Force measurements from the strain gauges may be used to adjust speaker output and other device operations.