Touch Detection Circuit Super-Resolution Signal Processing
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Solution Overview
Problem
Conventional touch detecting apparatuses face reduced accuracy in detecting the shape of objects due to blurred data from combining weak output signals from multiple sensors, leading to decreased detection precision.
Innovation Solution
A touch detecting apparatus comprising three or more detectors aligned in a direction, a generating circuit for integrating outputs to generate low-resolution data, a calculating circuit for deriving composite values, and a determining circuit for redetermining initial values based on differences, with detector combinations and shifts optimized to enhance detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If outputs from multiple detectors are combined to increase signal intensity, then detection capability is improved, but the shape information becomes blurred and detection accuracy is reduced
Solution Approach 1:
The patent segments the detection process into multiple patterns, where each pattern integrates outputs from a specific combination of detectors. By dividing the detectors into different groups (patterns) with overlapping arrangements, the system can process each segment separately and then combine the results to reconstruct high-resolution shape information while maintaining signal intensity benefits from multiple detectors.
Solution Approach 2:
The patent introduces a pattern dimension by creating multiple integration patterns with different detector combinations and shift amounts. This transforms the problem from a single integration approach to a multi-pattern approach, where the additional dimension of pattern selection enables the system to achieve both signal intensity and shape accuracy simultaneously through super-resolution processing.
2Power
If multiple detectors are integrated to form groups for signal enhancement, then signal intensity increases, but resolution is reduced
Solution Approach 1:
The patent employs dynamic pattern selection and shifting, where the detector groupings and their relative positions are varied across multiple patterns. This dynamic approach allows the system to capture signal intensity benefits from integration while the varying patterns prevent resolution loss by providing multiple perspectives that can be reconstructed into high-resolution information.
Solution Approach 2:
The patent creates a composite data structure by integrating outputs from multiple detectors in different patterns and combinations. This composite approach combines the strength of signal integration with the benefit of multiple detector perspectives, producing a composite result that maintains both signal intensity and resolution through super-resolution processing.
3Area of stationary object
If detector groups are shifted by large amounts between patterns, then coverage area increases, but detection accuracy decreases due to insufficient overlap
Solution Approach 1:
The patent optimizes the shift amount parameter by setting it to be smaller than the width of the group area in the alignment direction. This parameter adjustment ensures sufficient overlap between adjacent detector groups in different patterns, maintaining detection accuracy while still achieving adequate coverage area through the combination of multiple patterns.
Data Source
AI summary
According to an aspect, a touch detecting apparatus includes: three or more detectors; a generating circuit that performs generation for generating a plurality of pieces of output data corresponding to a plurality of patterns and having resolution lower than resolution corresponding to the number of the detectors based on outputs from the detectors; a calculating circuit that performs calculation for calculating, for each of the detectors, a composite value to be used to derive a detection result of each of the detectors based on the pieces of output data corresponding to the patterns.