Stretchable Touch Panel Compensation for Ghost Touch
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Solution Overview
Problem
Stretchable touch display devices experience ghost touch due to changes in the shape of the touch panel, causing ghost touch, which deteriorates touch performance.
Innovation Solution
Incorporating a strain sensor to detect changes in the shape of the display panel and a controller to compensate for touch raw data based on strain sensor feedback, ensuring accurate touch detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a stretchable touch display device is used to improve portability and utility, then the device can change into various shapes and be built into wearable devices, but the shape change of the touch panel causes ghost touch and deteriorates touch performance
Solution Approach 1:
The patent implements a feedback mechanism where the controller continuously monitors shape change information from the strain sensor and uses this feedback to adjust and compensate touch raw data. This closed-loop system allows the touch display to maintain accurate touch detection despite shape changes, resolving the contradiction between shape adaptability and touch performance reliability
Solution Approach 2:
The patent changes the parameter of touch data by applying compensation values based on detected shape changes. When the strain sensor detects shape changes, the controller calculates compensation values and adjusts the touch raw data accordingly, allowing the system to maintain accurate touch detection across different shapes
2Reliability
If strain sensor and compensation mechanism are added to eliminate ghost touch, then touch performance is improved, but device complexity increases
Solution Approach 1:
The controller performs multiple functions: it processes normal touch detection, monitors shape changes from the strain sensor, calculates compensation values, and adjusts touch data. By making the controller multi-functional, the patent avoids adding separate dedicated circuits for each function, thereby minimizing the increase in device complexity while still achieving improved touch performance
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Eliminates ghost touch by compensating for touch data changes, thereby improving touch performance and accuracy.
Implementation Method 1
a strain sensor configured to detects a change in a shape of the display panel
Data Source
AI summary
Discussed is a stretchable touch display device that improves touch performance by eliminating a ghost touch caused by change in a shape of a touch panel. The stretchable touch display device includes a display panel, a touch sensor configured to detect a touch on the display panel, a strain sensor configured to detects a change in a shape of the display panel, and a controller configured to determine whether there is the change in the shape of the display panel, based on a detection signal from the strain sensor, and upon determination that there is the change in the shape in the display panel, compensate for a change in touch raw data of the touch sensor, based on the change in the shape of the display panel.