Touch Detection Circuitry Error Event Recording
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Solution Overview
Problem
Existing touch sensing systems for in-vehicle applications face challenges in accurately detecting and recording error events, such as electrostatic discharge (ESD) or noise interference, which can lead to difficulty in tracing the root causes of touch detection failures.
Innovation Solution
A touch sensing apparatus equipped with a touch detection circuitry that detects touch operations, records error events, and writes these events into an external storage medium via a data transmission interface, including specific detection for ESD, temperature anomalies, and other potential errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If error events are recorded and written to external storage medium, then the ability to trace root causes of touch detection failures is improved, but the device complexity increases due to additional circuitry and storage requirements
Solution Approach 1:
The patent extracts the error event recording and storage functionality into a separate, dedicated module within the touch detection circuitry. This modular approach isolates the complexity of error handling from the main touch detection function, allowing the system to trace root causes of failures while maintaining manageable device complexity through functional separation.
2Measurement precision
If multiple error event types are detected and recorded, then the measurement precision of error detection is improved, but the device complexity increases due to multiple detection circuits
Solution Approach 1:
The patent implements a universal error detection mechanism within the touch detection circuitry that can identify and record multiple types of error events (ESD, noise interference, system refreshing events, panel broken, touch sensor open/shorted, temperature anomaly, system power anomaly) through a unified architecture. This multi-functional approach enables precise error detection across different failure modes without requiring separate dedicated circuits for each error type, thus maintaining device complexity at acceptable levels.
3Loss of information
If error events are written to external storage medium via data transmission interface, then the loss of information is reduced, but the productivity decreases due to waiting for interface idle status
Solution Approach 1:
The patent employs a preliminary action strategy by checking the status of the data transmission interface before attempting to write error events to external storage. The system proactively determines whether the interface is busy or idle, and only initiates writing operations when the interface is available. This prevents data loss from failed write attempts while avoiding unnecessary waiting periods, as the system is ready to write immediately when the interface becomes available.
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
The solution enables efficient recording and analysis of error events, facilitating the identification of root causes of touch detection failures, thereby improving the reliability and troubleshooting of touch sensing systems in in-vehicle applications.
Implementation Method 1
the error event detected by the touch detection circuitry includes an electrostatic discharge (ESD) event
Implementation Method 2
the touch detection circuitry includes a temperature sensor that is configured to detect a temperature of the touch detection circuitry
Data Source
AI summary
A touch sensing apparatus includes a panel with touch detection function and a touch detection circuitry. The touch detection circuitry is coupled to the panel, and is configured to detect a touch operation on the panel, record an error event of the touch sensing apparatus, and write the error event into an external storage medium via a data transmission interface thereof.