Pixel Structure Trench Insulation for Display Impact Resistance
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Solution Overview
Problem
Flat panel displays are vulnerable to mechanical impacts during transportation and operation, leading to potential damage and reduced endurance.
Innovation Solution
A pixel structure with an electric insulation layer featuring a trench and via configuration, where the pixel electrode's first electrode portion is recessed within the trench and the second electrode portion is in the via, allowing the electric insulation layer to absorb external mechanical impacts, thereby reducing damage to the electrode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the pixel electrode is directly exposed on the surface, then electrical connection is simplified, but the electrode becomes vulnerable to mechanical impacts
Solution Approach 1:
The first electrode portion is nested within the trench structure of the electric insulation layer, creating a protective cavity that shields the electrode from external mechanical impacts while maintaining electrical connectivity through the via structure
Solution Approach 2:
The electric insulation layer with trench structure is designed beforehand to absorb and distribute mechanical impact forces before they reach the pixel electrode, cushioning the electrode against damage during transportation and operation
2Reliability
If the electrode is protected by insulation layer, then mechanical endurance is improved, but electrical connection complexity increases
Solution Approach 1:
The electric insulation layer is segmented into distinct functional regions: a trench structure for mechanical protection and a via structure for electrical connection, allowing each segment to perform its specific function efficiently without unnecessary complexity
Solution Approach 2:
The insulation layer exhibits different local properties: the trench region provides mechanical protection with greater depth, while the via region provides electrical conductivity with direct connection to the active device, optimizing both protection and connectivity locally
3Strength
If the first electrode portion thickness equals trench depth, then electrode strength is maximized, but impact absorption capability is reduced
Solution Approach 1:
The thickness of the first electrode portion is deliberately changed to be less than the trench depth, creating an optimized parameter relationship that balances electrode strength with impact absorption capability of the surrounding insulation layer
Data Source
AI summary
A display apparatus includes at least one pixel structure, which includes an active device, an electric insulation layer and a pixel electrode. The electric insulation layer is disposed on the active device. The electric insulation layer has a trench and a via. The via is located on a bottom surface of the trench. A portion of the electric insulation layer surrounding the trench is monolithically connected to another portion of the electric insulation layer surrounding the via. A pixel electrode has a first electrode portion and a second electrode portion connected to each other. The first electrode portion is located in the trench. A thickness of the first electrode portion is less than a depth of the trench. The second electrode portion is located in the via and is electrically connected to the active device through the via.