X-ray Detector TFT Substrate ESD Protection via High-Resistance Induction Lines
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Solution Overview
Problem
Digital X-ray detector devices are susceptible to defects caused by static electricity, which can lead to signal interference and noise in the readout circuit signal, especially in the absence of electrostatic discharge (ESD) prevention circuits in the readout circuit pad area.
Innovation Solution
A thin film transistor array substrate for digital X-ray detectors incorporates an electrostatic induction line with higher resistance than the readout circuit pad connection line, which is connected to the readout circuit pad to dissipate static electricity without the need for additional ESD prevention circuits, minimizing defects and signal noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an ESD prevention circuit is added to the readout circuit pad area, then static electricity protection is improved, but signal interference and noise occur in the readout signal
Solution Approach 1:
The patent divides the readout circuit pad area into multiple separate pad regions (first readout circuit pad area, second readout circuit pad area, etc.) with different potentials. This segmentation allows independent ESD protection for each pad without causing signal interference between them, as each pad can be protected separately with its own reference potential.
Solution Approach 2:
The patent introduces a reference potential line as an intermediary element that provides a stable reference potential to the readout circuit pads. This reference potential acts as a mediator that enables ESD protection while maintaining signal integrity, as it provides a common reference point that prevents signal interference and noise.
2Loss of information
If no ESD prevention circuit is included in the readout circuit pad area, then signal interference is minimized, but defects occur due to static electricity
Solution Approach 1:
The patent applies different potentials to different regions of the readout circuit pad area, creating local quality variations. Each pad region has its specific potential relative to the reference potential, allowing ESD protection to be implemented locally at each pad without affecting the overall signal integrity across the entire readout circuit.
Solution Approach 2:
The patent creates equipotential regions by connecting multiple readout circuit pads to a common reference potential line. This equipotential configuration ensures that all pads operate at the same reference potential, preventing signal interference while allowing individual ESD protection for each pad through their respective potential differences.
3Device complexity
If the readout circuit pad area is designed without considering static electricity, then device complexity is reduced, but defects occur due to static electricity inflow
Solution Approach 1:
The reference potential line serves multiple functions simultaneously: it provides a common reference potential for all readout circuit pads, enables ESD protection for each pad, and maintains signal integrity across the readout circuit. This multi-functionality allows ESD protection to be implemented without significantly increasing device complexity, as a single reference line serves multiple purposes.
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
This solution effectively minimizes defects and signal noise caused by static electricity, ensuring stable readout circuit signal detection without the requirement for additional ESD prevention circuits, thereby enhancing the reliability of digital X-ray detector devices.
Implementation Method 1
at least one electrostatic induction line which is connected to the readout circuit pad connection line and has a greater resistance than a resistance of the readout circuit pad connection line
Data Source
AI summary
A thin film transistor array substrate for a digital X-ray detector device includes a base substrate where a driving area and a non-driving area are defined; at least one readout circuit pad disposed in the non-driving area and electrically connected to the drive area; at least one readout circuit pad connection line electrically connecting the driving area to the at least one readout circuit pad; and at least one electrostatic induction line electrically connected to the at least one readout circuit pad connection line, wherein the at least one electrostatic induction line has a greater resistance than a resistance of the at least one readout circuit pad connection line.