Display Device Mesh Power Lines Reduce Contact Resistance
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Solution Overview
Problem
Display devices, particularly OLEDs, face issues with luminance uniformity due to increased contact resistance, leading to non-uniform illumination and manufacturing complexities.
Innovation Solution
The implementation of a display device design where second power supply lines made of the same material as gate electrodes intersect first power supply lines in a mesh form within the active area, reducing contact resistance and enhancing luminance uniformity, while also simplifying the manufacturing process by reducing the need for additional masks and processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If power supply lines are arranged in conventional configurations, then manufacturing process is simpler, but contact resistance increases and luminance uniformity deteriorates
Solution Approach 1:
The power supply lines are divided into first power supply lines extending in a first direction and second power supply lines extending in a second direction, forming a mesh-like segmented structure that reduces contact resistance and improves luminance uniformity
Solution Approach 2:
The patent introduces a second dimension of power supply lines intersecting the first power supply lines, creating a two-dimensional mesh structure that provides additional current paths and reduces contact resistance without significantly increasing manufacturing complexity
2Reliability
If additional power supply lines are added to reduce contact resistance, then luminance uniformity improves, but manufacturing complexity increases
Solution Approach 1:
The first and second power supply lines are merged into a unified mesh structure that works together to reduce contact resistance, with the lines intersecting to form multiple connection paths that enhance electrical reliability
Solution Approach 2:
The mesh structure of power supply lines serves multiple functions: providing current paths, reducing contact resistance, and improving luminance uniformity, making the structure highly efficient without requiring additional specialized components
Data Source
AI summary
The present disclosure relates to a display device. The display device according to an exemplary embodiment of the present disclosure includes a substrate including an active area including a plurality of sub-pixels and a non-active area surrounding the active area; a plurality of transistors disposed in the plurality of sub-pixels, respectively; a plurality of first power supply lines connected to the plurality of sub-pixels; and a plurality of second power supply lines disposed to intersect the plurality of first power supply lines and made of the same material as gate electrodes of the plurality of transistors. Therefore, it is possible to improve the luminance of the display device and suppress the occurrence of mura.