Touch Sensitive Panel Auto-Calibration via External Simulation
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Solution Overview
Problem
Existing touch-sensitive electronic devices require manual calibration using embedded touch event generators, which is cumbersome and necessitates additional components on the display panel.
Innovation Solution
An electronic device with a touch-sensitive panel that includes a touch simulation facility, allowing for automatic calibration by simulating touch events without the need for embedded generators, using movable parts or flexible elements that mechanically or electrically replicate a touch on the panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual calibration using embedded touch event generators is used, then calibration can be performed, but the device complexity increases and manufacturing becomes more cumbersome
Solution Approach 1:
The patent extracts the touch event generator from the display panel structure and relocates it to an external calibration tool. This allows calibration functionality to be removed from the permanent device structure, reducing device complexity while maintaining calibration capability through temporary external application.
Solution Approach 2:
The patent introduces an intermediary calibration tool that temporarily provides touch event generators during calibration. This mediator enables the calibration process without requiring permanent embedded generators in the display panel, thus achieving calibration while reducing overall device complexity.
2Extent of automation
If embedded touch event generators are used for calibration, then automatic calibration is possible, but manufacturing complexity increases
Solution Approach 1:
By extracting the touch event generator from the display panel and placing it in an external calibration tool, the patent enables automatic calibration functionality to be added temporarily during manufacturing or calibration processes, then removed. This avoids permanently increasing manufacturing complexity while maintaining automation capability.
Solution Approach 2:
The patent performs the calibration action preliminarily using an external tool before the device is finalized. The calibration is conducted in advance using temporary generators, allowing automatic calibration to be achieved without requiring permanent structural modifications that would complicate manufacturing.
3Measurement precision
If touch event generators are cemented or embedded in the display panel, then calibration can be performed, but additional components are required on the panel
Solution Approach 1:
The patent extracts the touch event generator component from the display panel assembly and relocates it to an external calibration tool. This extraction eliminates the need for additional components to be permanently integrated into the display panel, reducing the total number of components while maintaining touch location sensing calibration capability.
Solution Approach 2:
The patent uses a copy or replica of the touch event generator functionality in an external calibration tool, rather than requiring the actual generator to be embedded in the panel. This copying approach enables calibration without adding permanent components to the display panel structure.
Data Source
AI summary
An electronic device having a touch sensitive panel has an opened and a closed state, and comprises a sensor circuit, a touch simulation facility and a comparator. The sensor circuit is for generating a touch signal indicative for a position where a touch of the touch sensitive panel is detected. The touch simulation facility is for evoking a touch signal at a position of the touch sensitive panel, and comprises a touch simulation element which in the closed state of the electronic device is arranged opposite the touch sensitive panel. The comparator is for comparing the touch signal with a reference value corresponding to the touch simulation element and for generating a correction signal for adjusting a setting of the sensor circuit for compensation of a difference detected between the position where the touch signal is evoked and the position indicated by the touch signal.