Touch Display Panel Damage Detection Through Voltage Feedback
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Solution Overview
Problem
Existing touch display panels lack an automated mechanism to detect abnormalities such as sensor or display damage, which is crucial for enhancing driving safety in the automotive industry.
Innovation Solution
A method for detecting damages in touch display panels by selecting devices under test, applying voltages, and analyzing feedback signals for capacitance or voltage information to determine device integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If manual touch or human eye observation is used to detect abnormalities, then the detection mechanism is simple, but the automation level is low and safety coefficient is insufficient
Solution Approach 1:
The detection mechanism utilizes the existing TDDI IC chip resources (pixel circuits, touch sensing circuits, signal lines) to perform self-detection. The IC chip itself serves as both the device being tested and the testing instrument, eliminating the need for external complex detection equipment. The pixel circuits and touch sensing circuits automatically detect abnormalities in signal lines and touch electrodes during normal operation.
Solution Approach 2:
The TDDI IC chip performs multiple functions: it drives display pixels, processes touch sensing signals, and simultaneously conducts self-detection of internal circuits and signal lines. The pixel circuits and touch sensing circuits serve dual purposes of normal operation and abnormality detection, reducing the need for dedicated detection hardware.
2Reliability
If no detection mechanism is integrated in the IC, then the device complexity is low, but the reliability is insufficient for automotive safety
Solution Approach 1:
The TDDI IC chip performs self-detection using its own internal resources. The pixel circuits detect abnormalities in gate lines and source lines, while touch sensing circuits detect abnormalities in touch electrodes. This self-service approach enhances reliability without requiring external detection systems.
Solution Approach 2:
The detection mechanism provides feedback signals when abnormalities are detected. The pixel circuits generate feedback about signal line status, and touch sensing circuits provide feedback about touch electrode condition. This feedback enables the system to automatically report irregularities and enhance driving safety.
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
Enables automated detection of abnormalities in touch display panels, improving safety by identifying open or shorted components and facilitating timely warnings.
Implementation Method 1
the feedback signal comprises voltage information or capacitance information of the DUT
Data Source
AI summary
A method for detecting damages of a touch display panel is provided. The touch display panel includes a plurality of sensing pads and a plurality of signal lines. The method includes: selecting at least one first device of the sensing pads and the signal lines as a device under test (DUT); apply a first voltage to the DUT and receiving a feedback signal from the DUT, wherein the feedback signal comprises voltage information or capacitance information of the DUT; and determining whether the DUT is damaged according to the feedback signal.