OLED Display Substrate Grid Layout for Uniform Signal Distribution
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Solution Overview
Problem
Existing display technologies face challenges in achieving uniform distribution of initialization, reference voltage, and power signals in organic light-emitting diode (OLED) display devices, which affect display uniformity.
Innovation Solution
A display substrate design featuring grid-like structures for initialization, reference voltage, and power signal transmission structures, including conductive layers with crisscrossed signal lines and grid lines, ensures uniform signal distribution across the display region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional linear signal transmission structures are used, then the device complexity is reduced, but the uniformity of signal distribution deteriorates
Solution Approach 1:
The signal transmission structures are segmented into multiple conductive layers (first conductive layer and second conductive layer) with different grid line orientations. The first grid lines extend in the first direction while the second grid lines extend in the second direction, creating a multi-layered segmented structure that improves signal distribution uniformity across the display region.
Solution Approach 2:
The invention transitions from a single-layer linear signal transmission structure to a multi-layer grid structure by adding another dimension (layer depth). The first and second conductive layers are stacked vertically, with grid lines extending in different directions, transforming the signal distribution from one-dimensional to three-dimensional space, thereby achieving more uniform coverage.
2Manufacturing precision
If signal transmission structures are added to improve uniformity, then the display quality is improved, but the manufacturing process complexity increases
Solution Approach 1:
The invention merges the signal transmission functions into the existing multi-layer conductive structure of the OLED device. The first and second conductive layers are integrated with other device components, combining signal transmission with structural support and electrical connection functions, thereby reducing the need for separate manufacturing processes.
Solution Approach 2:
The conductive layers serve multiple functions: they provide signal transmission pathways, establish electrical connections between different device components, and contribute to the overall structural integrity. This multi-functionality reduces the number of dedicated manufacturing steps required for signal transmission structures.
Data Source
AI summary
A display substrate is provided, including: a base substrate; a plurality of sub-pixels on the base substrate, the sub-pixel including a light-emitting element and a driving circuit; a first initialization signal transmission structure electrically connected to the driving circuit; a second initialization signal transmission structure electrically connected to the driving circuit; a reference voltage signal transmission structure electrically connected to the driving circuit; a second power signal transmission structure electrically connected to a second electrode of the light-emitting element. An orthographic projection of at least one of the first initialization signal transmission structure, the second initialization signal transmission structure, the reference voltage signal transmission structure or the second power signal transmission structure on the base substrate is in a shape of a grid.