Display Power Line Layout for Reduced White Angle Dependency
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Solution Overview
Problem
Display devices experience surface non-uniformity and white angle dependency due to wiring lines overlapping display elements, causing step differences that affect viewing angle consistency.
Innovation Solution
The display device incorporates a power line design with first and second conductive lines that intersect at oblique angles relative to data and scan lines, reducing overlap and minimizing surface non-uniformity by arranging conductive lines in regions between adjacent light emitting elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wiring lines are disposed behind the display element, then electrical connection is achieved, but step difference is formed under the display element causing surface non-uniformity
Solution Approach 1:
The patent changes the spatial arrangement of wiring lines from horizontal/vertical planes to diagonal dimensions. The first and second wiring lines extend in first and second directions respectively, intersecting each other in a diagonal arrangement that allows them to pass underneath display elements without creating step differences on the display surface, thus resolving the contradiction between electrical connection and surface uniformity.
2Reliability
If wiring lines overlap display elements, then electrical connection is established, but white angle dependency is generated affecting image quality
Solution Approach 1:
The patent employs asymmetric positioning of wiring lines relative to display elements. The first and second wiring lines are positioned diagonally such that they do not symmetrically overlap with display elements from any viewing angle. This asymmetric arrangement minimizes the visual impact of wiring lines on display quality, particularly reducing white angle dependency while maintaining necessary electrical connections.
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.