Touch Position Locating via Signal Sorting and Grouping
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Solution Overview
Problem
Existing methods for locating touch positions on touch display screens are time-consuming and inefficient, requiring repetitive group selection and significant memory usage.
Innovation Solution
A method that sorts touch signals in a decreasing sequence and performs group selection based on signal values to efficiently determine the physical center coordinates of touch areas, using a bubble sorting algorithm and a nine-square grid threshold for grouping, thereby reducing repetition and memory usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional group selection methods are used to locate touch positions, then accurate touch position recognition is achieved, but the process becomes time-consuming and requires multiple returns to starting points
Solution Approach 1:
The patent applies preliminary action by sorting all touch signals in decreasing order of their signal values before performing group selection. This preprocessing step ensures that signals are already organized by strength, allowing the group selection algorithm to proceed sequentially without needing to return to starting points multiple times. The strongest signals are processed first, establishing a clear processing order that eliminates repetitive operations.
2Area of stationary object
If traditional group selection methods are used, then complete touch area coverage is achieved, but significant memory space is consumed for storage
Solution Approach 1:
The patent extracts and processes only the necessary information for group selection by sorting signals based on their values and positions. Instead of storing and processing all raw touch signal data simultaneously, the method extracts key parameters (signal values and coordinates) in a sorted sequence, allowing group selection to proceed with minimal stored data. This extraction approach reduces memory requirements while maintaining complete touch area coverage.
3Measurement precision
If repetitive group selection is performed to ensure accurate touch location, then positioning accuracy is improved, but processing efficiency decreases
Solution Approach 1:
By pre-sorting all touch signals in decreasing order of their signal values, the patent eliminates the need for repetitive group selection iterations. The sorted sequence provides a deterministic processing order where each signal is evaluated once in context of already-processed stronger signals, ensuring positioning accuracy without requiring multiple passes through the data.
Solution Approach 2:
The patent implements continuous useful action by processing signals in a single sequential pass through the sorted array. Once signals are sorted, the group selection algorithm continuously progresses through the list from strongest to weakest signal, making a decision about group membership for each signal without interruption or repetition. This continuous processing maintains accuracy while maximizing processing efficiency.
Data Source
AI summary
A method for locating a touched position on a touch panel acquires a sensing signal from a sensing area on the touch panel when the touch panel is touched. A determination is made as to whether the sensing signal of the sensing area on the touch panel is a touch signal and if so, sorting all the touch signals to obtain a decreasing sequence of strength of touch signals. Selection of groups of all the touch signals in the decreasing sequence is carried out according to a direction of decrease of strength, to divide all the touch areas into at least one group. Calculating a physical center of each of the at least one group, wherein the touch position of each of the groups is taken as the physical center and point of origin of the coordinates.