Optical Touch Panel Correction via Dynamic Block Segmentation
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Solution Overview
Problem
Optical touch panels face inaccuracies due to positional deviations of optical lenses, leading to mismatches between touch positions and system positions.
Innovation Solution
A correction method that detects user input within predefined correction blocks, calculates distortion errors, and adjusts these blocks until errors are within thresholds, allowing for accurate conversion of touch positions to system positions using correction parameters and weighting values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If optical lenses are used to capture touch images, then the touch panel achieves low cost and good accuracy, but positional deviation of the optical lenses causes mismatch between touch position and system position
Solution Approach 1:
The display screen is divided into multiple correction blocks, and each correction block is further divided into multiple divided correction blocks. This segmentation allows the system to handle positional deviations locally in each block rather than globally, improving the accuracy of touch position to system position conversion by addressing deviations in smaller, more manageable regions.
Solution Approach 2:
The system calculates distortion error quantities for each correction block and adjusts the division strategy based on error thresholds. When distortion error exceeds a preset threshold, the correction block is divided into smaller divided correction blocks. This dynamic parameter adjustment optimizes the balance between correction accuracy and processing efficiency.
2Measurement precision
If the correction block is divided into multiple divided correction blocks, then the distortion error quantity is reduced, but the complexity of the correction process increases
Solution Approach 1:
The system dynamically determines whether to divide correction blocks based on calculated distortion error quantities and preset thresholds. Correction blocks with low distortion errors are not divided, while those exceeding thresholds are divided into smaller blocks. This dynamic approach optimizes correction precision where needed while avoiding unnecessary complexity in regions with acceptable error levels.
Solution Approach 2:
The system calculates distortion error quantities for each correction block and uses this feedback to determine further division strategies. This feedback mechanism ensures that division occurs only when necessary to reduce errors below acceptable thresholds, preventing unnecessary increases in system complexity.
Data Source
AI summary
A touch apparatus and a correction method thereof are provided. Whether to divide a correction block is determined by calculating distortion error quantity of the correction block, so as to make the distortion error quantity of each divided correction block is less than or equal to a preset threshold. A correction parameter set of each correction block is obtained. Accordingly, in an operation procedure, correction for a touch behavior of a user is executed based on the correction parameter set.