Auxiliary Wire Reduces Voltage Drop in Display Power Lines
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Solution Overview
Problem
Light emitting diode displays face issues with non-uniform power voltage distribution due to wire resistance and voltage drop, leading to decreased luminance uniformity and increased power consumption.
Innovation Solution
Incorporating an auxiliary wire that overlaps and is electrically connected to both the power voltage line and data line, reducing wire resistance and voltage drop by connecting to the power voltage line through a contact hole in the insulating layer, and potentially overlapping with a pixel electrode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If power voltage lines are used to transfer power voltage across the display area, then power supply is achieved, but wire resistance and voltage drop cause non-uniform power distribution and decreased luminance uniformity
Solution Approach 1:
The power voltage line is segmented into multiple sections by introducing auxiliary wires at different positions. Each segment is independently connected to the power voltage line through contact holes, creating multiple parallel current paths that reduce the overall resistance and voltage drop across the display area.
Solution Approach 2:
Auxiliary wires are introduced as intermediary conductive elements between the main power voltage line and the transistor power terminals. These auxiliary wires act as mediators to distribute power voltage more evenly across different regions of the display area, reducing the impact of wire resistance.
2Use of energy by stationary object
If power voltage lines with high resistance are used, then device complexity is reduced, but power consumption increases due to voltage drop
Solution Approach 1:
The power distribution network is segmented into multiple sections with auxiliary wires positioned at different locations. This segmentation creates parallel current paths that reduce overall resistance and power consumption without requiring a complete redesign of the power voltage line structure.
Solution Approach 2:
The auxiliary wires serve multiple functions: they act as additional power voltage transfer paths, provide alternative current routes to reduce resistance, and help maintain voltage uniformity across the display area. This multi-functionality reduces power consumption without proportionally increasing device complexity.
3Illumination intensity
If auxiliary wires are added to reduce wire resistance, then luminance uniformity improves, but device complexity increases
Solution Approach 1:
Auxiliary wires are strategically positioned at specific locations where voltage drop is most problematic, rather than uniformly distributing them throughout the entire display area. This localized approach improves luminance uniformity in critical regions while minimizing the increase in overall device complexity.
Solution Approach 2:
The auxiliary wires are disposed at different positions and potentially different layers, adding a spatial dimension to the power distribution network. This dimensional arrangement allows for improved power distribution without significantly increasing the planar complexity of the wire 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 improves display quality by reducing power consumption and signal delay, while maintaining luminance uniformity across the display area.
Implementation Method 1
the auxiliary wire is electrically connected to the power voltage line
Data Source
AI summary
A display device includes a substrate including a display area and a non-display area around the display area; a transistor on the substrate; an insulating layer on the transistor; a power voltage line on the insulating layer and transferring a power voltage; a data line on the insulating layer and transferring a data voltage; and an auxiliary wire between the substrate and the power voltage line in the display area. The auxiliary wire includes a portion overlapping the power voltage line and a portion overlapping the data line in a plan view and is electrically connected to the power voltage line.