Lateral Frame Sensor Array for Side-Edge Force Input Detection
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Solution Overview
Problem
Current touch sensors are limited in their ability to detect and characterize side inputs on mobile devices, such as smartphones and tablets, as they lack efficient systems for continuous pressure sensing along device perimeters, leading to inadequate input detection and functionality.
Innovation Solution
A system comprising a sensor module with a linear array of drive and sense electrodes integrated into the device's frame, which outputs sense signals representing local deflections, and a controller that interprets these signals to detect force magnitudes and locations of side inputs, dynamically linking them to virtual buttons and triggering context-dependent commands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional touch sensors are used, then device structure is simple, but side input detection capability is insufficient
Solution Approach 1:
The sensor module is segmented into a linear array of discrete sensor elements positioned along the device side edge. Each sensor element independently detects local deflections, enabling continuous pressure sensing across the side surface while maintaining manageable structural complexity through modular segmentation.
Solution Approach 2:
The patent transitions from traditional 2D touch sensing on the display surface to 3D side-edge pressure sensing by positioning sensor elements along the vertical edge of the device. This dimensional shift enables detection of side inputs (volume buttons, power button, etc.) that were previously undetectable by conventional touch sensors.
2Adaptability or versatility
If discrete button inputs are used, then input locations are fixed, but input functionality is limited
Solution Approach 1:
The system dynamically assigns input functions to different regions along the side edge based on detected deflection patterns. The controller interprets sense signals to determine both location and force magnitude of side inputs, enabling context-dependent command triggering that adapts to user intent rather than relying on fixed button assignments.
Solution Approach 2:
The linear array of sensor elements serves multiple functions: detecting volume button presses, power button presses, and potential new gesture inputs along the side edge. The same sensor module structure supports various input types (touch, press, slide) and can be configured for different applications, providing universal side input detection capability.
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 continuous pressure sensing and input detection along device sides, allowing for dynamic reassignment of input types and functions based on device orientation, screen content, and user interactions, enhancing user experience and device functionality.
Implementation Method 1
a linear array of sensors arranged on the substrate and configured to output sense signals representing local deflections of the lateral frame structure
Data Source
AI summary
One variation of a system includes: a frame; a sensor module; and a controller. The frame includes: a base structure that locates a display defining a front face of a device; and a lateral frame structure extending along and adjacent an edge of the display and supported on a side of the base structure. The base structure and the lateral frame structure cooperate to define a channel arranged behind the display and extending longitudinally between the lateral frame structure and the side of the base structure. The sensor module is arranged in the channel and includes: a substrate; and a linear array of sensors arranged on the substrate and outputting sense signals representing local deflections of the lateral frame structure. The controller detects locations and force magnitudes of side inputs on the device, proximal the edge of the display, based on sense signals output by the linear array of sensors.