Touch Coordinate Correction for Display Panel Edge Accuracy
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Solution Overview
Problem
Existing display devices face challenges in maintaining touch performance in the peripheral area of the display panel due to long-term operation and environmental changes, leading to reduced touch sensitivity and accuracy.
Innovation Solution
A method for detecting touch coordinates that corrects touch sensitivity and coordinates by normalizing raw data variation using preset normalization tables based on raw data variation amounts, and calculating an offset value to extend distances between reference lines and touch coordinates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If the display device operates for a long time, then the raw data of touch nodes in the peripheral area increases, but touch sensitivity decreases and touch accuracy is reduced
Solution Approach 1:
The patent applies preliminary action by measuring the raw data variation amount of touch nodes in the peripheral area in advance, before touch accuracy degradation becomes significant. Based on this pre-measured variation, the system proactively adjusts the touch sensitivity threshold and corrects touch coordinates, preventing accuracy loss rather than reacting to it after occurrence
Solution Approach 2:
The patent changes parameters by dynamically adjusting the touch sensitivity threshold based on the measured raw data variation amount. When variation exceeds a threshold, the system modifies the sensitivity parameter and applies coordinate correction, transforming the fixed touch detection parameters into adaptive ones that compensate for aging effects
2Object-affected harmful factors
If the raw data variation amount increases due to environmental changes, then touch sensitivity deteriorates, but the display device structure remains fixed
Solution Approach 1:
The patent implements feedback by continuously monitoring the raw data variation amount of peripheral touch nodes and using this information to adjust the touch sensitivity threshold. The system measures variation, compares it against thresholds, and dynamically modifies detection parameters, creating a closed-loop control system that adapts to environmental changes
Solution Approach 2:
The display device performs self-service by autonomously measuring its own touch node raw data variation and automatically adjusting its touch sensitivity parameters without external intervention. The system uses its built-in touch nodes to monitor itself and self-correct performance degradation
Data Source
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AI summary
According to an embodiment of the present specification, a touch coordinate detection method includes generating touch coordinates based on raw data, and correcting the touch coordinates, wherein correcting the touch coordinates includes extending a first distance between a reference line and the touch coordinates to a second distance, and correcting the touch coordinates using the second distance, wherein the second distance is calculated as a value corresponding to the first distance based on an offset value calculated according to the variation value of the raw data. Accordingly, the touch performance in the peripheral area of the display panel is adaptively and significantly improved.