Display Panel Driver Shielding for Transistor Threshold Stability
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Solution Overview
Problem
Display panels face issues with transistor stability due to ion infiltration and environmental factors, leading to afterimages and threshold drift, which affect display performance.
Innovation Solution
Incorporating shielding structures connected to potential signal terminals that overlap channel regions of transistors, providing electronic shielding to prevent ion infiltration and stabilize transistor operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If shielding structures are added to protect transistors from ion infiltration, then transistor stability is improved, but device complexity increases
Solution Approach 1:
The shielding sub-structure is integrated within the existing transistor structure, nested between the source/drain electrodes and the channel region. This nesting approach allows the shielding function to be incorporated without adding external components, thus improving transistor stability while minimizing increases in device complexity
Solution Approach 2:
The shielding sub-structure serves multiple functions: it shields the channel region from ion infiltration, acts as an additional gate control structure, and can be formed using the same manufacturing processes as existing transistor components. This multi-functionality addresses the technical contradiction by providing protection while maintaining manufacturing efficiency
2Reliability
If shielding structures overlap channel regions to prevent ion infiltration, then transistor stability is improved, but manufacturing complexity increases
Solution Approach 1:
The shielding sub-structure is formed by adjusting the gate electrode parameters (such as width, position, and electrical potential) rather than introducing entirely new materials or complex processing steps. This parameter-based approach enables the shielding function to be achieved through modifications to existing manufacturing processes, thus improving transistor stability while maintaining ease of manufacture
Solution Approach 2:
The shielding sub-structure is formed using the same manufacturing processes that create the existing transistor components, allowing the shielding function to be generated as a byproduct of normal fabrication. This self-service approach minimizes additional manufacturing complexity while achieving the desired ion infiltration protection
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 effectively reduces the impact of ions and environmental factors on transistors, enhancing their stability and the overall display effect by preventing afterimages and maintaining consistent performance.
Implementation Method 1
The shielding sub-structure is connected to a potential signal terminal
Data Source
AI summary
A display panel includes a substrate and driver circuits disposed on one side of the substrate. A driver circuit includes at least two transistors. Gates of two transistors are connected to different control signal terminals. The display panel further includes shielding structures disposed on one side of the substrate facing the driver circuit. The shielding structures include shielding sub-structures each of which at least partially overlaps a channel region of one of the two preceding transistors. Different shielding sub-structures are connected to different potential signal terminals.