Array Substrate Grid Wiring for High-PPI OLED Uniformity
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Solution Overview
Problem
The increasing demand for high pixel density in display panels poses challenges in wiring design, requiring closer line arrangements while minimizing interference between lines, particularly in Organic Light Emitting Diode (OLED) displays.
Innovation Solution
An array substrate design featuring a grid-like structure formed by intersecting initialization signal lines and connection lines, connected through via holes, which are arranged in multiple conductive layers to enhance signal transmission paths and reduce wiring pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If various lines are closely arranged to increase pixel density, then the pixel density (PPI) is improved, but the interference between various lines increases
Solution Approach 1:
The patent transitions from planar wiring to three-dimensional stacked conductive layers. Initialization signal lines are arranged in a first conductive layer extending in the row direction, while connection lines are arranged in a second conductive layer extending in the column direction. This vertical stacking allows lines to cross without interfering with each other, enabling closer line arrangements for higher pixel density while maintaining signal integrity.
Solution Approach 2:
The wiring structure is segmented into multiple independent conductive layers. The initialization signal lines and connection lines are separated into different layers (first conductive layer and second conductive layer), with each layer serving a specific function. This segmentation allows independent optimization of each line type without mutual interference, resolving the contradiction between close arrangement and signal interference.
2Reliability
If multiple conductive layers are used to reduce wiring pressure, then the signal transmission is improved, but the device complexity increases
Solution Approach 1:
The stacked conductive layer structure serves multiple functions simultaneously: it provides separate transmission paths for initialization signals and connection signals, enables grid-like intersection patterns for comprehensive coverage, and reduces mutual interference between different signal types. This multi-functionality justifies the increased structural complexity by delivering significant performance improvements in signal transmission reliability.
Data Source
AI summary
The present disclosure relates to an array substrate and a display device. The array substrate includes a plurality of pixel units arranged in an array, each of the pixel units including a plurality of sub-pixels. The array substrate includes: a plurality of power lines which are arranged in a conductive layer on a base substrate, are arranged at intervals along a first direction and extend along a second direction, and are used for providing power signals to the sub-pixels; and a plurality of power leads which are arranged in another conductive layer, are arranged at intervals along the second direction and extend along the first direction. Projections of at least one of the power lines and at least one of the power leads on the base substrate intersect, and the projections of the power lines and the power leads on the base substrate form a grid-like structure.