Wooden Capacitive Touch Interface for Wireless Speaker Control

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Solution Overview

Problem

Existing capacitive touchscreens are limited to glass surfaces and lack integration with wireless audio devices, limiting user interaction and functionality.

Innovation Solution

A wireless-enabled loudspeaker with a wooden or dielectric capacitive touch interface that allows users to control audio playback and network connectivity through capacitive touch controls etched into the wooden surface, utilizing a capacitive sense electrode system and wireless transceiver for audio streaming.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If glass or non-wood materials are used for capacitive touchscreen, then the touchscreen functionality is achieved, but the aesthetic and environmental appeal deteriorates

Engineering Contradiction:

Improveaesthetic and environmental appealVSAvoidcapacitive touch functionality

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent applies composite materials by combining wood (aesthetic, environmentally friendly material) with conductive elements (transparent conductive coating or conductive ink) to create a capacitive touchscreen surface. This composite structure allows the wooden surface to provide aesthetic appeal while the conductive layer enables capacitive touch functionality, resolving the contradiction between appearance and functionality.

Inventive Principle:

Principle #40Composite materials

2Ease of operation

If a capacitive touch interface is added to the loudspeaker, then user control capability is improved, but device complexity increases

Engineering Contradiction:

Improveuser control capabilityVSAvoiddevice complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent merges the capacitive touch interface with the existing loudspeaker structure by integrating the touch-sensitive surface as part of the speaker's exterior or control panel. The capacitive sense electrodes are incorporated into the existing device architecture, allowing user control functionality to be added without creating a separate, complex control system.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The capacitive touch interface serves multiple functions within the loudspeaker system, including volume control, track selection, play/pause commands, and potentially wireless connectivity control. This multi-functionality approach allows a single interface element to provide comprehensive user control, reducing the need for multiple separate controls and thereby limiting the increase in device complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Ease of manufacture

If wood or dielectric material is used for the exterior surface, then aesthetic appeal is improved, but capacitive touch sensitivity deteriorates

Engineering Contradiction:

Improveaesthetic appealVSAvoidcapacitive touch sensitivity

Core Design Contradiction:

Ease of manufactureVSMeasurement precision

Solution Approach 1:

The patent applies local quality by modifying specific regions of the wooden or dielectric surface to enhance capacitive coupling. This may involve applying conductive coatings only in areas where touch sensitivity is needed, or creating localized conductive patterns that improve signal detection while preserving the overall aesthetic appearance of the wooden surface.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent uses composite materials by combining the wooden or dielectric exterior surface with a conductive layer (transparent conductive coating or conductive ink pattern) that enhances capacitive touch sensitivity. The conductive layer is integrated into the composite structure, allowing the aesthetic wood surface to coexist with improved electrical properties for touch detection.

Inventive Principle:

Principle #40Composite materials

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

Enables intuitive control of audio playback and network interactions directly on a wooden surface, enhancing user experience and functionality without the need for physical buttons or cables.

Implementation Method 1

a distortion of the screen's electrostatic field results, measurable as a change in capacitance, because the human body is also an electrical conductor

Methodology Applied

Scientific EffectCapacitance: Capacitance

Implementation Method 2

the wooden exterior surface acts a dielectric for the capacitive touch user interface

Methodology Applied

Scientific EffectDielectric: Dielectric

Data Source

PatentUS12621593B2Wooden or other dielectric capacitive touch interface and loudspeaker having same

Publication Date: 2026.05.05 KOSS CORP

AI summary

Wireless-enabled loudspeaker includes a capacitive touch user interface. The loudspeaker may comprise at least one electroacoustic transducer, a processor in communication with the at least one electroacoustic transducer, and an exterior surface comprising a capacitive touch user interface that allows a user to control operation of the loudspeaker. The exterior surface acts a dielectric for the capacitive touch user interface. The loudspeaker may comprise a wireless transceiver circuit for receiving and transmitting wireless communication signals via a wireless network. The wireless transceiver circuit may receive wirelessly audio content from streaming audio content servers that are connected to the Internet. The capacitive touch user interface comprises a plurality of capacitive sense electrodes.