Oblique Display Power Lines for Reduced Element Overlap
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Solution Overview
Problem
Display devices with overlapping wiring lines cause surface non-uniformity and white angle dependency due to step differences under display elements, affecting image quality and color consistency across view angles.
Innovation Solution
The design includes a substrate with a pixel region and peripheral region, where power lines are configured with first and second conductive lines intersecting each other, with some second conductive lines extending obliquely to reduce overlap with light emitting elements, thereby minimizing step differences and surface irregularities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If wiring lines are arranged parallel to data lines or scan lines, then manufacturing is simplified, but surface non-uniformity and white angle dependency occur due to step differences under display elements
Solution Approach 1:
The patent applies asymmetry by arranging at least one power line in an oblique direction relative to the data lines and scan lines, rather than parallel to them. This asymmetric arrangement reduces the overlap area between power lines and light emitting elements, thereby minimizing step differences and improving surface uniformity while maintaining manufacturing feasibility
Solution Approach 2:
The patent introduces a new dimensional approach by changing the orientation of power lines from the conventional parallel arrangement (same dimension as data/scan lines) to an oblique arrangement. This dimensional change in line orientation reduces overlap with light emitting elements and eliminates the harmful step differences that cause surface non-uniformity
2Device complexity
If power lines extend in straight lines parallel to data lines, then device complexity is reduced, but white angle dependency and color difference occur across view angles
Solution Approach 1:
The patent applies asymmetry by configuring at least one power line to extend in an oblique direction rather than parallel to data lines. This asymmetric configuration reduces the overlap area between power lines and light emitting elements, minimizing step differences that cause white angle dependency and improving color consistency across different viewing angles
Solution Approach 2:
The patent applies local quality by specifically adjusting the orientation of power lines in regions where they overlap with light emitting elements. By making the power line arrangement oblique in these critical areas while maintaining parallel arrangement elsewhere, the patent locally optimizes surface uniformity and color consistency without requiring complete redesign of the entire wiring structure
Data Source
AI summary
A display device includes a substrate including a pixel region and a peripheral region. A plurality of pixels is disposed in the pixel region of the substrate. Each of the plurality of pixels includes a light emitting element. Data lines and scan lines are connected to each of the plurality of pixels. A power line is configured to supply power to the plurality of pixels. The power line includes a plurality of first conductive lines and a plurality of second conductive lines intersecting the plurality of first conductive lines. The plurality of second conductive lines is arranged in a region between adjacent light emitting elements of the plurality of pixels. At least some of the plurality of second conductive lines extend in a direction oblique to a direction of extension of the data lines or the scan lines.