Smart Ring Input Integration for Compact Application Switching
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Solution Overview
Problem
Conventional smart ring devices face challenges with voice recognition impracticality in noisy environments, hardware complexity from physical buttons, limited capacitive touch resolution, and rigid-flex PCB constraints that limit component placement and device size.
Innovation Solution
A smart ring system utilizing rotational motion gestures, optical and capacitive touch inputs, haptic feedback, and color indications, combined with a flexible printed circuit board and over-molding process to enable seamless application switching without traditional touch screens or buttons, and address false positive triggers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If voice recognition technology is used for changing device modality, then hands-free operation is enabled, but it becomes impractical in noisy environments or contexts where privacy is required
Solution Approach 1:
The smart ring integrates multiple input methods (voice commands, physical buttons, capacitive touch, optical touch) into a single device, allowing users to switch between different interaction modes depending on the environment and situation, thereby achieving universal adaptability across various use cases
2Adaptability or versatility
If physical buttons are incorporated for changing applications, then application switching capability is enabled, but hardware complexity increases and design manufacturability is limited
Solution Approach 1:
The patent combines physical buttons with capacitive touch and optical touch systems into an integrated input mechanism. The physical buttons serve multiple functions (application switching, device control) while the optical touch system overlays additional capabilities without requiring separate hardware for each function, thereby reducing overall hardware complexity
Solution Approach 2:
The physical buttons are programmed to perform multiple functions including application switching, device control, and gesture recognition. This multi-functionality eliminates the need for dedicated hardware for each specific task, reducing hardware complexity while maintaining versatility
3Adaptability or versatility
If physical buttons are used for changing applications, then application switching is enabled, but the buttons require dedicated hardware that limits design flexibility
Solution Approach 1:
The patent merges physical buttons with flexible PCB technology, allowing the buttons to be integrated directly into the ring structure during manufacturing. This combination eliminates the need for separate button assemblies and enables streamlined production processes while maintaining application switching functionality
4Ease of operation
If capacitive touch systems are used on smart ring devices, then touch input capability is enabled, but the limited surface area prevents sufficient resolution for two-dimensional trackpad-like features
Solution Approach 1:
The patent transitions from two-dimensional capacitive touch to three-dimensional optical touch detection. By using optical sensors that can detect touch pressure, location, and gesture direction in three dimensions, the system achieves high-resolution input capabilities on a small ring surface, enabling trackpad-like functionality without requiring large surface area
5Measurement precision
If optical touch systems are used to enable two-dimensional trackpad features, then touch resolution is improved, but false positive touches are triggered by materials like fabric and cloth
Solution Approach 1:
The patent implements feedback mechanisms that analyze multiple parameters (touch pressure, gesture speed, gesture pattern, material properties) to distinguish between intentional user input and false positives from fabric or clothing. The system uses haptic feedback and visual indicators to confirm registered gestures, allowing users to verify and reject false touches
6Strength
If traditional rigid-flex PCBs are used in ring devices, then structural integrity is maintained, but the minimum flex section length of five millimeters significantly limits component placement options
Solution Approach 1:
The patent replaces traditional rigid-flex PCBs with ultra-thin flexible PCB technology that can be bent to the required curvature without minimum length constraints. This flexible film technology maintains structural integrity through advanced material composition and bonding techniques while enabling integrated circuits to be placed on curved sections and significantly reducing device thickness
7Quantity of substance
If integrated circuits are placed on curved sections of rigid-flex PCB, then component density is increased, but the structural integrity is compromised by over molding pressure
Solution Approach 1:
The patent uses ultra-thin flexible PCB technology with specialized protective coatings that allow integrated circuits to be placed on curved sections without compromising structural integrity. The flexible film structure distributes over-molding pressure evenly, preventing damage to solder joints and components while maintaining the required curvature for ring device integration
Data Source
AI summary
A smart ring system for changing applications and methods for making and using the same. The smart ring system comprises a wearable smart ring equipped with input mechanisms for user interaction, wireless communication devices for interfacing with a variety of electronic devices and/or a power management system for efficient energy use. The smart ring system advantageously can allow users to seamlessly switch between and control applications on connected devices, such as smartphones, cameras, televisions, smart home devices, mixed-reality devices, via a combination of rotational motion gestures, optical and capacitive based touch inputs, haptic feedback and color indications on the smart ring system. The smart ring system advantageously can be manufactured with one or more flexible printed circuit boards that can be encased via an over molding process, which allows for thinner and more compact device profile for improved wearability.