Multi-Layer Display Wiring for Uniform Luminance
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Solution Overview
Problem
Existing display devices face issues with non-uniform luminance due to voltage drop (IR Drop) in the central part of the display area, leading to variations in display quality across different areas.
Innovation Solution
The display device is designed with multi-layer transmission lines that allow separate voltages to be applied to different areas within the display panel, mitigating voltage drop and ensuring uniformity by distributing resistance across the display area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single-layer transmission line structure is used, then the device complexity is low, but voltage drop occurs in the central part leading to non-uniform luminance
Solution Approach 1:
The transmission line structure is divided into multiple segments (first transmission lines and second transmission lines) arranged in different layers. The first transmission lines are disposed in a first plane while the second transmission lines are disposed in a second plane, creating a segmented multi-layer configuration that distributes current paths and reduces voltage drop in any single region.
Solution Approach 2:
The patent transitions from a single-plane (2D) transmission line structure to a multi-plane (3D) structure by disposing transmission lines in different layers. The first transmission lines are in a first plane and the second transmission lines are in a second plane, adding a vertical dimension to the current distribution pathway, which effectively reduces voltage drop and improves luminance uniformity.
2Reliability
If multiple transmission lines are used to reduce voltage drop, then luminance uniformity improves, but the device complexity increases
Solution Approach 1:
The patent combines multiple transmission lines (first and second transmission lines) into a unified multi-layer structure that works together to distribute voltage. The connection layer integrates these transmission lines with the light-emitting elements, merging the voltage distribution function across multiple layers into a cohesive system that improves luminance uniformity without proportionally increasing complexity.
Solution Approach 2:
The multi-layer transmission line structure serves multiple functions simultaneously: it distributes voltage to light-emitting elements, reduces voltage drop through alternative current paths, and provides structural organization for different voltage zones. The first and second transmission lines can serve different functional zones (first area and second area) while maintaining overall system integration.
3Manufacturing precision
If separate voltages are applied to different areas, then display quality improves, but the manufacturing process becomes more complex
Solution Approach 1:
The patent implements local quality by applying different voltages to different spatial zones through the multi-layer transmission line structure. The first transmission lines apply a first voltage to light-emitting elements in a first area, while the second transmission lines apply a second voltage to light-emitting elements in a second area. This localized voltage control optimizes display quality for different regions without requiring completely separate manufacturing processes.
Data Source
AI summary
The display device includes a substrate including a first area and a second area not overlapping the first area; a plurality of light-emitting elements disposed on the substrate and which emit light; first transmission lines, which apply a first voltage to light-emitting elements overlapping with the first area among the plurality of light-emitting elements; second transmission lines insulated from the first transmission lines and which apply a second voltage to light-emitting elements overlapping with the second area among the plurality of light-emitting elements; and a connection layer connecting each of the first and second transmission lines with each of the plurality of light-emitting elements.