Display Pixel Bank Layout for Wider Color Viewing Angles
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Solution Overview
Problem
Display devices experience color distortion when viewed from various angles, necessitating improved luminance deviation characteristics to maintain image quality across different viewing angles.
Innovation Solution
A display device design featuring a substrate with a transistor, planarization layers, and a bank with multiple openings of varying sizes, where the metal pattern is symmetrically disposed under these openings to enhance color viewing angle characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional display device structures are used, then manufacturing is simpler, but color coordinates are distorted when viewed from various angles
Solution Approach 1:
The patent applies asymmetry by intentionally designing the bank opening structure with different opening sizes (first opening, second opening, third opening) rather than uniform openings. This asymmetric configuration of openings with varying dimensions allows for optimized light extraction and color uniformity across different viewing angles, resolving the color distortion issue while maintaining a manageable structural complexity through systematic design patterns.
2Reliability
If the bank includes openings of different sizes, then color viewing angle characteristics are improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent implements local quality by assigning different opening sizes to different regions of the bank structure. The first opening, second opening, and third opening have specifically different dimensions tailored to their respective locations and functional requirements. This localized optimization of opening characteristics enables improved color viewing angle performance while the systematic variation pattern helps manage manufacturing precision requirements through repeatable design rules.
3Reliability
If the metal pattern is symmetrically disposed, then color vision angle characteristics are improved, but device complexity increases
Solution Approach 1:
The patent applies asymmetry in the metal pattern arrangement by positioning the metal pattern symmetrically relative to the different sized openings rather than creating a fully symmetric overall structure. This approach balances the asymmetric opening configuration with a symmetric metal pattern placement, improving color vision angle characteristics while avoiding the complexity of completely symmetric designs by leveraging the inherent asymmetry of the opening structure.
Data Source
AI summary
A display device includes a substrate, a transistor disposed on the substrate and including a first source-drain electrode material pattern, an active layer, and a gate electrode positioned to overlap the active layer, a first planarization layer disposed on the first source-drain electrode material pattern of the transistor, a metal pattern disposed on the first planarization layer and electrically connected to the transistor, a second planarization layer covering the metal pattern and a bank disposed on the second planarization layer and including a plurality of openings of different sizes, wherein the metal pattern is spaced apart at the same interval in regions under the plurality of openings of different sizes. According to embodiments of the present specification, it is possible to provide a display device with improved color vision angle characteristics.