Display Power Mesh Wiring for High-Resolution Pixel Driver Integration
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Solution Overview
Problem
As display devices increase in size or resolution, the resistance of wires causes power or constant voltage to be delayed or distorted, limiting the integration of light emitting pixel drivers and the high resolution of the display device.
Innovation Solution
The implementation of mesh-shaped wiring that extends in intersecting directions, connecting neighboring power auxiliary lines through mesh auxiliary electrodes, reduces the width of the power line and facilitates the integration of light emitting pixel drivers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mesh-shaped wiring is used to transmit power to light emitting pixel drivers, then power transmission efficiency is improved, but the width of power lines increases which limits the integration of light emitting pixel drivers
Solution Approach 1:
The power line is segmented into multiple auxiliary power lines arranged in a mesh pattern. Instead of using a single wide power line, the patent divides it into multiple thinner auxiliary power lines (first auxiliary power line, second auxiliary power line, etc.) that are distributed across the display area. This segmentation reduces the width occupied by power transmission while maintaining efficient power delivery to pixel drivers through the distributed mesh structure.
Solution Approach 2:
The patent transitions from a one-dimensional linear power line to a two-dimensional mesh structure. The auxiliary power lines are arranged in multiple directions (first direction and second direction) forming a mesh pattern, allowing power to reach pixel drivers from multiple pathways. This dimensional change enables more efficient power distribution across the display area without requiring excessive line width in any single direction.
2Manufacturing precision
If display device area or resolution is increased, then display quality is improved, but wire resistance increases causing power delay or distortion
Solution Approach 1:
The power transmission path is segmented into multiple shorter segments through the mesh of auxiliary power lines. Instead of relying on a single long wire that spans the entire display area (which would have high resistance), the mesh structure creates multiple shorter transmission paths. Pixel drivers can receive power from the nearest auxiliary power line, reducing the length of each wire segment and minimizing resistance-related power delay and distortion.
Solution Approach 2:
The auxiliary power lines act as intermediaries between the main power source and the pixel drivers. Rather than directly connecting the power source to distant pixel drivers with long wires, the mesh of auxiliary power lines serves as an intermediate distribution network, breaking down the long transmission path into manageable segments and reducing the overall resistance impact.
Data Source
AI summary
There is provided a display device comprises a substrate comprising a display area in which emission areas; a circuit layer; and an element layer comprising light emitting elements disposed in the emission areas. The circuit layer comprises light emitting pixel drivers electrically connected to the light emitting elements and arranged in a plurality of pixel columns and a plurality of pixel rows; and a first power line transmitting a first power to the light emitting pixel drivers. The first power line comprises power auxiliary lines extending in one direction; and mesh auxiliary electrodes electrically connected to the power auxiliary lines. Among the power auxiliary lines, two power auxiliary lines neighboring each other are electrically connected to each other through mesh auxiliary electrodes disposed between the two power auxiliary lines and parallel to each other in the one direction, among the mesh auxiliary electrodes.