Convex Bridge Wiring for Display Color Banding Reduction
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Solution Overview
Problem
Display devices experience a significant degree of color banding due to external light reflection, particularly in mobile applications where external light sources are prevalent, leading to reduced visibility and user experience.
Innovation Solution
The design incorporates specific wiring configurations and pixel electrode arrangements, including bridge wirings with convex shapes and strategic via holes, to minimize the occurrence of color banding by ensuring that pixel electrodes are inclined relative to the substrate, thereby reducing light reflection angles and preventing overlapping orthogonal projections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If pixel electrodes are arranged in a conventional planar configuration, then manufacturing is simple, but external light reflection causes color banding that reduces display quality
Solution Approach 1:
The pixel electrodes are configured with a convex shape in the vertical direction, creating a curved surface that reflects external light at multiple angles rather than a single angle. This curvature prevents concentrated color banding by dispersing the reflected light across different directions, thereby reducing the visibility of color bands while maintaining manufacturing feasibility through standard deposition processes.
2Reliability
If bridge wirings are added to connect pixel electrodes, then electrical connectivity is improved, but structural complexity increases
Solution Approach 1:
The bridge wirings are integrated into the same layer structure as the pixel electrodes, combining the electrical connection function with the existing electrode architecture. This merging approach allows the bridge wirings to follow the convex profile of the pixel electrodes, creating a unified structure that provides reliable electrical connectivity without significantly increasing overall device complexity.
Solution Approach 2:
The bridge wirings are positioned at a different vertical level (on a layer different from the first insulating layer) relative to the pixel electrodes, utilizing the vertical dimension to route connections. This dimensional separation allows the bridge wirings to connect pixel electrodes without interfering with the planar layout, reducing lateral complexity while maintaining electrical reliability.
3Object-affected harmful factors
If via holes are strategically positioned, then light reflection is reduced, but manufacturing precision requirements increase
Solution Approach 1:
Via holes are strategically positioned at specific locations where they effectively interrupt or redirect light paths that would otherwise cause color banding. The via holes are placed at critical zones such as the boundaries of pixel electrodes or at positions where light reflection is most problematic, providing localized light management solutions that reduce overall reflection without requiring precise positioning across the entire display structure.
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 configuration effectively reduces the visibility of color bands caused by external light reflection, enhancing the display device's performance and user experience in various lighting conditions.
Implementation Method 1
external light is reflected by the display device and a color band may be viewed
Data Source
AI summary
A display device includes a 1-1st wiring including a 1-1st end at an end portion thereof in a first direction, a 1-2nd wiring extending in a second direction opposite to the first direction and including a 1-2nd end that is apart from the 1-1st end, a second wiring that is apart from the 1-1st wiring and the 1-2nd wiring, a first bridge wiring in contact with the 1-1st wiring and the 1-2nd wiring and electrically connecting the 1-1st wiring to the 1-2nd wiring, and a third wiring extending in the first direction and disposed such that the second wiring is between the 1-1st wiring and the third wiring. The first bridge wiring has a convex shape in a direction opposite to a direction from the 1-1st wiring and the 1-2nd wiring to the second wiring.