Stretchable Touch Panel Correction for Uniform Touch Coordinates
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Solution Overview
Problem
Existing display devices with stretchable or flexible substrates face challenges in maintaining accurate touch performance when stretched or deformed, leading to non-uniform touch data that affects the reliability and precision of touch inputs.
Innovation Solution
A display device with a stretchable touch panel and display panel, equipped with an actuator that deforms the panels and a touch driver that corrects touch data values by adjusting the number of electric charge removing capacitors connected to touch electrodes based on the panel's deformation state, ensuring uniformity and accuracy of touch coordinates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the touch panel is stretched to enable flexible display, then the adaptability and shape changeability are improved, but the touch data uniformity and measurement precision deteriorate
Solution Approach 1:
The patent applies local quality by differentiating between stretched and non-stretched areas of the touch panel. The touch driver identifies the stretchable area and applies different correction strategies to different regions, ensuring that touch data from stretched areas is corrected differently from non-stretched areas, thereby maintaining overall touch data uniformity across the flexible display
Solution Approach 2:
The patent changes the parameter of touch data values by applying correction values specific to stretched areas. The touch driver modifies the touch data coordinates and sensitivity parameters based on the deformation state, transforming the non-uniform touch data into uniform corrected values that maintain measurement precision despite panel stretching
2Shape
If the touch panel is deformed by actuator, then the stereoscopic display ability is improved, but the touch performance and reliability deteriorate
Solution Approach 1:
The patent applies preliminary action by pre-identifying the stretchable area of the touch panel and pre-calculating correction values before touch input occurs. The touch driver is configured to recognize deformation states in advance and apply appropriate correction algorithms, ensuring reliable touch performance even when the panel is deformed into stereoscopic configurations
Solution Approach 2:
The patent implements feedback by continuously monitoring touch data uniformity across the panel and applying dynamic correction values. The touch driver adjusts correction parameters based on the actual deformation state and touch data characteristics, creating a closed-loop system that maintains touch performance reliability under various stereoscopic display conditions
Data Source
AI summary
According to an aspect of the present disclosure, a display device includes: a stretchable touch panel having a plurality of touch electrodes; a stretchable display panel configured to display an image; and a touch driver configured to operate the stretchable touch panel, in which the touch driver recognizes a stretchable area of the stretchable touch panel and corrects a touch data value of the stretchable area of the stretchable touch panel, thereby improving touch performance of the stretchable touch panel.