Interactive Cord Capacitive Touchpoints Prevent False Positives
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Solution Overview
Problem
Conventional in-line controls for cords, such as those used in headphones or household appliances, face issues with durability, corrosion from sweat and skin contact, and limited expressiveness due to hardware-based designs, leading to increased bulk and cost.
Innovation Solution
An interactive cord with a fabric cover containing conductive threads for capacitive touchpoints, allowing for touch input detection and function control without separate RF shielding, reducing manufacturing complexity and cost, and enabling authentication through touch patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hardware buttons are used for in-line controls, then control functionality is provided, but durability decreases and corrosion from sweat and skin contact occurs
Solution Approach 1:
The patent replaces mechanical hardware buttons with capacitive touch sensing integrated into the fabric cover. The conductive threads woven into the fabric create touch-sensitive areas that detect user input through capacitance changes, eliminating mechanical moving parts that can break or corrode from sweat and skin contact.
Solution Approach 2:
The patent uses composite materials by integrating conductive threads into the fabric cover structure. This creates a multi-functional material system where the fabric provides both mechanical protection and capacitive sensing capabilities, improving durability while maintaining control functionality.
2Adaptability or versatility
If more control functions are added to hardware buttons, then expressiveness increases, but bulk and cost increase
Solution Approach 1:
The patent implements multi-functionality by using the same capacitive touch fabric interface for various control operations. Different touch patterns, locations, and sequences on the fabric cover can trigger different functions (play/pause, volume control, track skipping, etc.), providing high interface expressiveness without adding physical controls.
Solution Approach 2:
The patent replaces mechanical control expansion with software-based function differentiation. The capacitive touch fabric can detect various touch inputs (tap, hold, swipe, pinch) and map these to different control functions through software, increasing expressiveness without adding hardware complexity.
3Object-affected harmful factors
If separate RF shielding is added to the cord, then electromagnetic interference protection improves, but manufacturing complexity and cost increase
Solution Approach 1:
The patent merges the RF shielding function with the fabric cover structure. The conductive threads that provide capacitive sensing also serve as the RF shielding layer, eliminating the need for separate shielding materials and reducing manufacturing complexity while maintaining electromagnetic interference protection.
Solution Approach 2:
The fabric cover with conductive threads performs multiple functions simultaneously: mechanical protection of the cable, capacitive touch sensing for control input, and RF shielding for electromagnetic interference protection. This multi-functionality reduces overall device complexity and manufacturing steps.
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 interactive cord enhances durability, reduces bulk and cost, and provides secure authentication by distinguishing intentional from accidental touch inputs, minimizing false positives and offering a more expressive interface.
Implementation Method 1
The fabric cover includes one or more conductive threads woven into the fabric cover to form one or more capacitive touchpoints which are configured to enable reception of touch input that causes a change in capacitance to the one or more conductive threads
Implementation Method 2
the fabric cover acts as an RF shield for the cable, thereby reducing the need to manufacture the cord with a separate RF shield
Data Source
AI summary
This document describes techniques and devices for preventing false positives with an interactive cord. An interactive cord includes a cable, and fabric cover that covers the cable. The fabric cover includes one or more conductive threads woven into the fabric cover to form one or more capacitive touchpoints which are configured to enable reception of touch input that causes a change in capacitance to the one or more conductive threads. A controller, implemented at the interactive cord or a computing device coupled to the interactive cord, can detect the change in capacitance and trigger one or more functions associated with the one or more capacitive touchpoints. In one or more implementations, the interactive cord is designed to prevent “false positives” which may occur from accidental contact with the touchpoints, such as when the interactive cord makes contact with the user's body or a conductive surface.