Touch Coordinate Compensation for Parallax Errors
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Solution Overview
Problem
Existing electronic devices with touch screens face input errors due to individual parallax, varying finger sizes and shapes, and different gripping orientations, leading to deviations in touch coordinates and incorrect object determinations.
Innovation Solution
An electronic device with a touch calibration function that records and compensates for user-specific touch offset data, including touch offset direction and distance, to accurately determine intended touch targets by adjusting touch coordinates based on user-specific calibration data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If standard touch coordinate detection is used, then device operation is simple, but touch input accuracy deteriorates due to individual parallax and finger variations
Solution Approach 1:
The system performs preliminary calibration by detecting the user's actual touch coordinates and comparing them with standard coordinates before normal operation. This preliminary detection and storage of offset values enables accurate touch input without requiring complex real-time adjustments during actual use.
Solution Approach 2:
The patent introduces an intermediary calibration mechanism that mediates between the standard touch coordinate system and the user's actual touch behavior. By detecting offset values and using them as intermediaries to adjust coordinate mapping, the system resolves the contradiction between standard simplicity and individual accuracy.
2Reliability
If touch coordinate compensation is implemented, then touch input accuracy is improved, but processing complexity increases
Solution Approach 1:
The system performs self-calibration by automatically detecting the user's touch coordinate offsets and storing them for future use. This self-service approach eliminates the need for manual calibration procedures and reduces the complexity of coordinate processing during normal operation, as the compensation values are pre-determined and automatically applied.
Solution Approach 2:
The patent implements a feedback mechanism where the detected touch coordinates are compared with standard coordinates, and the offset values are stored and fed back into the coordinate processing system. This feedback loop enables continuous improvement of touch input reliability while maintaining processing efficiency through cached compensation values.
3Measurement precision
If individual calibration data is collected and stored, then user-specific accuracy is enhanced, but data management complexity increases
Solution Approach 1:
The system applies local quality by storing and applying calibration data specific to each user's touch characteristics. Instead of using a universal calibration approach, the patent maintains separate offset values for different users and even different fingers, enabling precise local adaptation to individual touch patterns while managing data complexity through organized storage structures.
Data Source
AI summary
A touch input control method comprising steps is provided: displaying an interface comprising at least one object; gathering signals as to actual touches for calibration purposes. In use, calculating coordinates of the touch; determining whether the coordinates of the actual touch match the predetermined touch coordinates of the object; creating an adjustment signal if the coordinates of the touch is not the same as the predetermined touch coordinates of any object; determining which finger used for touch input, and retrieving a touch offset direction and a touch offset distance of the determined finger of the user from a calibration database; and applying compensation to the coordinates of the touch, so as to determine the touched object. An electronic device using the touch input control method is also provided.