Touch Panel Threshold Adjustment for Accurate Touch Type Detection
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Solution Overview
Problem
Conventional touch sensor devices struggle to accurately identify the type of touch operation due to a fixed threshold for distinguishing between different touch objects, such as a touch pen, fingertip, or palm.
Innovation Solution
A touch sensor device and touch panel device that allows users to adjust the threshold for identifying the type of touch operation, incorporating a touch operation detector, identifier, and an adjustment controller, with a display controller providing instruction contents for user interaction to update the threshold based on detected touch sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a fixed threshold is used for identifying touch operation types, then the device structure is simple, but the identification accuracy is insufficient due to variations in touch object thickness and user individual differences
Solution Approach 1:
The patent implements a dynamic threshold adjustment mechanism where the threshold is no longer fixed but adapts based on detected touch size. The adjustment controller modifies the threshold according to the actual touch characteristics, allowing the system to accommodate variations in touch object thickness and user individual differences, thereby resolving the contradiction between simple structure and accurate identification.
Solution Approach 2:
The patent changes the threshold parameter from a fixed value to a dynamically adjustable value based on touch size detection. By modifying this critical parameter according to actual measurement data, the system achieves higher identification accuracy without requiring fundamentally more complex hardware, thus resolving the contradiction between measurement precision and device complexity.
2Measurement precision
If a fixed threshold is used for identifying touch operation types, then the device is easy to operate, but the identification accuracy is insufficient
Solution Approach 1:
The system performs self-adjustment of the threshold parameter based on automatically detected touch size characteristics. The adjustment controller autonomously modifies the threshold without requiring manual user calibration, allowing the device to adapt to different touch objects and users while maintaining ease of operation. This resolves the contradiction by making the system intelligent and self-configuring.
3Measurement precision
If the threshold is adjusted according to touch size, then the identification accuracy is improved, but the processing complexity increases
Solution Approach 1:
The system performs preliminary detection of touch size characteristics before final identification of touch operation types. By pre-processing the touch data to extract size information and adjust the threshold in advance, the system simplifies the subsequent identification process and reduces overall processing complexity while maintaining high accuracy.
Solution Approach 2:
The patent separates the touch detection process into distinct stages: touch size detection, threshold adjustment based on detected size, and final touch type identification. This segmentation allows each component to be optimized independently, reducing processing complexity while achieving high identification accuracy through the coordinated workflow.
Data Source
AI summary
A touch sensor device includes: a touch sensor; a touch operation detector that detects a touch size by a touch operation of a user for the touch sensor; a touch operation identifier that identifies a type of the touch operation based on the touch size and at least one threshold; and an adjustment controller that adjusts the threshold in accordance with an operation by the user in an adjustment mode.