Touch Panel Stimulus Position Determination via Detection Regions
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Solution Overview
Problem
Touch panels struggle to accurately detect repetitive or spatially temporal stimuli, particularly when contacted with a finger, leading to incorrect stimulus detection.
Innovation Solution
A display device with a matrix-patterned sensing electrode, a calculator that divides the panel into detection regions, and a position determiner that determines the stimulus position based on the coordinates of sensing electrodes, selecting the second stimulus as the intended position if generated within a predetermined time after the first stimulus, and outputs an error signal for repetitive stimuli.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a touch panel is used to detect user input, then user interaction capability is improved, but repetitive stimuli cause incorrect detection and reduce reliability
Solution Approach 1:
The system performs preliminary action by dividing the display panel into multiple detection regions and establishing coordinate systems before stimuli occur. When repetitive stimuli are detected, the pre-established detection regions enable the system to identify and filter out repetitive patterns, selecting only intentional touch inputs for processing.
Solution Approach 2:
The system implements feedback by continuously monitoring stimulus coordinates and comparing them against previously detected stimulus positions. When a new stimulus falls within a predetermined distance of a previous stimulus position, the system identifies it as repetitive and excludes it from processing, thereby maintaining detection accuracy.
2Measurement precision
If the display panel is divided into multiple detection regions, then stimulus position identification accuracy is improved, but device complexity increases
Solution Approach 1:
The display panel is segmented into multiple detection regions with assigned coordinates, creating a grid-like structure that simplifies stimulus position identification. Each detection region serves as a discrete unit for detecting and locating touches, making the overall system more manageable despite the increased number of regions.
Solution Approach 2:
The system transitions from detecting simple touch presence to detecting two-dimensional coordinates within detection regions. By introducing coordinate information (X, Y positions) for each detected stimulus, the system gains precise spatial awareness without requiring overly complex hardware modifications.
3Reliability
If coordinate calculation uses average coordinates of multiple sensing electrodes, then detection robustness is improved, but calculation complexity increases
Solution Approach 1:
When multiple sensing electrodes detect stimuli simultaneously, the system merges their individual coordinate measurements by calculating the average position. This consolidation approach combines information from multiple sensors to produce a single, more reliable coordinate representation of the touch location.
Solution Approach 2:
The system changes the parameter representation from individual electrode coordinates to averaged coordinate values. By transforming multiple discrete coordinate measurements into a single average position, the system achieves more robust detection while simplifying subsequent processing operations.
Data Source
AI summary
A display device including a display panel, a sensing electrode that is disposed in a matrix pattern and outputs a sensing signal with respect to an external stimulus, a calculator that divides the display panel into a plurality of detection regions based on a coordinate of a first stimuli group outputting a sensing signal with respect to a first stimulus, and a position determiner is presented. The position determiner determines a coordinate of a second stimuli group outputting a sensing signal with respect to a second stimulus and designates the coordinate as a stimulus position if the second stimulus is generated from a selection detection region within predetermined detection time after the first stimulus.