Colored Capping Patterns for Display Substrates
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Solution Overview
Problem
As display resolution increases, the challenge is to maintain high display quality in OLED and LCD devices by forming fine patterns on smaller pixel circuits, which existing technologies struggle to achieve due to issues with light reflection and pattern uniformity.
Innovation Solution
A display substrate with a base substrate, a lower stack structure including active patterns, gate electrodes, and wirings with stepped portions, where colored capping patterns made of non-photosensitive polymer materials absorb light in the 300-500 nm range are used to cover the wirings, ensuring uniform height and preventing light degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If display resolution is increased, then display quality is improved, but light reflection and pattern uniformity deteriorate
Solution Approach 1:
The patent applies the 'Blessing in disguise' principle by converting the harmful light reflection into a beneficial effect. Colored capping patterns with specific absorbance characteristics (300-500 nm range) are formed on the wirings to actively absorb and convert the harmful reflected light into useful light absorption, thereby improving display quality while maintaining high resolution.
Solution Approach 2:
The patent implements the 'Color changes' principle by introducing colored capping patterns with specific optical absorbance properties. These patterns are designed to absorb light in the 300-500 nm wavelength range, effectively managing light reflection issues in high-resolution displays through selective color-based light absorption.
2Measurement precision
If display resolution is increased, then display quality is improved, but pattern uniformity deteriorates
Solution Approach 1:
The patent applies the 'Local quality' principle by introducing colored capping patterns with specific absorbance characteristics at localized positions on the wirings. This local modification ensures uniform light absorption properties across different regions of the display, maintaining pattern uniformity while enabling high resolution through targeted optical property adjustments.
Solution Approach 2:
The patent implements the 'Parameter changes' principle by modifying the optical parameters of the wiring structures through the application of colored capping patterns. By controlling the absorbance characteristics (300-500 nm range) and physical parameters (thickness, material composition) of these patterns, the patent achieves both high resolution and uniform pattern appearance across the display.
3Object-affected harmful factors
If wirings with stepped portions are used, then light reflection is reduced, but manufacturing complexity increases
Solution Approach 1:
The patent applies the 'Another dimension (Dimensionality change)' principle by introducing a vertical dimension to the wiring structure through stepped portions. This multi-level structure effectively reduces light reflection by creating varying heights and angles, while the complexity is managed through systematic formation processes that build these structures layer by layer.
Solution Approach 2:
The patent implements the 'Composite materials' principle by combining multiple materials with different optical and electrical properties to form the stepped wiring structure. The wirings are constructed using composite material systems that provide both the structural complexity needed for light reflection reduction and the electrical functionality required for display operation.
4Object-affected harmful factors
If colored capping patterns are formed, then light absorption is improved, but material selection constraints increase
Solution Approach 1:
The patent applies the 'Parameter changes' principle by precisely controlling the optical parameters of the colored capping patterns, specifically targeting light absorption in the 300-500 nm wavelength range. This parameter-based approach allows for systematic material selection and optimization, balancing light absorption performance with manufacturing feasibility through defined absorbance specifications.
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 enhances display quality by absorbing light reflections and maintaining uniform pattern heights, thereby improving the resolution and longevity of the display device.
Implementation Method 1
colored capping patterns made of non-photosensitive polymer materials absorb light in the 300-500 nm range
Data Source
AI summary
Display substrates, methods of manufacturing the same and display devices including the same disclosed. In one aspect, a display substrate includes a base substrate and a stack structure over the base substrate, the stack structure including an active pattern, a gate electrode and a plurality of insulation layers. The display substrate also includes a plurality of wirings over the stack structure and a plurality of colored capping patterns over respective ones of the wirings.