3D Approach Sensing Electrode Arrays for Touch Input
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Solution Overview
Problem
Conventional touch sensing apparatuses are limited to detecting 2-dimensional positions, restricting user input configurations and failing to accurately sense objects approaching within a 3-dimensional space.
Innovation Solution
A touch sensing apparatus comprising multiple first and second approach sensing electrode arrays arranged on a substrate, capable of detecting capacitance variations in a 3D approach sensing region, generating approach sensing signals, and producing contact information including position and motion data of objects within this region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional touch sensing apparatus uses single electrode array for 2D position detection, then device complexity is low, but measurement precision and adaptability are limited to 2-dimensional space only
Solution Approach 1:
The patent transitions from 2D touch detection to 3D approach detection by adding a second electrode array perpendicular to the first array. This dimensional expansion enables detection of objects approaching in three-dimensional space, not just contact on the surface, thereby resolving the contradiction between measurement precision and device complexity.
Solution Approach 2:
The detection system is segmented into two independent electrode arrays (first array for X-axis detection, second array for Y-axis detection) that work orthogonally. This segmentation allows the system to achieve 3D detection capability while maintaining manageable complexity through modular, perpendicular arrangement of sensing elements.
2Adaptability or versatility
If conventional touch sensing apparatus detects only contact input, then ease of operation is simple, but adaptability of user input configurations is limited
Solution Approach 1:
By detecting approach in the Z-dimension (vertical distance from surface) in addition to X and Y coordinates, the system enables new input configurations such as hovering selection, proximity-based commands, and multi-level interaction, greatly enhancing adaptability without requiring complex additional hardware.
Solution Approach 2:
The dual electrode array system serves multiple functions: it detects both contact and non-contact approach, determines 3D position, and enables various input methods (touch, hover, gesture), making the sensing apparatus universally applicable to diverse user interaction scenarios.
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 accurate detection and generation of contact information for objects approaching without direct contact, enhancing user input capabilities by sensing in a 3D space, thereby expanding interface configurations.
Implementation Method 1
detecting a variation of capacitance generated between the plurality of first approach sensing electrode arrays and the plurality of second approach sensing electrode arrays
Implementation Method 2
detecting a change of an electric field formed between the plurality of first approach sensing electrode arrays and the plurality of second approach sensing electrode arrays
Data Source
AI summary
A touch sensing apparatus includes an approach sensing electrode unit including a plurality of first approach sensing electrode arrays disposed on a substrate and a plurality of second approach sensing arrays disposed adjacent to the first approach sensing electrode arrays, a voltage supply unit to supply a voltage to any of the first approach sensing electrode arrays and the second approach sensing electrode arrays, a signal generation unit to generate an approach sensing signal by detecting a variation of capacitance generated between the first approach sensing electrode arrays and the second approach sensing electrode arrays, the variation of capacitance occurring in a 3-dimensional (3D) approach sensing region, and an information generation unit to generate contact information corresponding to the approach sensing signal generated by the signal generation unit.