OLED Display Substrate Layout for High-Resolution, High-Frequency Driving
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Solution Overview
Problem
Existing OLED display substrates face challenges in achieving high resolution while maintaining high-frequency driving, as they typically have low resolution due to the design of dual data lines connecting pixels in a single column.
Innovation Solution
The display substrate incorporates a design with power lines connected through functional layers, including a semiconductor layer, conductive layers, and insulating layers, with power supply parts arranged at angles greater than 90 degrees and less than 180 degrees relative to data lines, and includes a connection structure for storage capacitors and transistors to enhance connectivity and reduce overlapping areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If dual data lines are used to connect pixels in a single column for high-frequency driving, then driving frequency is improved, but resolution deteriorates
Solution Approach 1:
The patent transitions from a planar layout to a three-dimensional stacked architecture. Power lines are routed through multiple conductive layers (first, second, third conductive layers) separated by insulating layers, allowing power delivery in the vertical dimension while data lines remain in the horizontal plane. This dimensional separation enables independent optimization of power distribution and data signaling without mutual interference, resolving the contradiction between high-frequency driving capability and display resolution.
Solution Approach 2:
The power line system is segmented into multiple independent conductive layers rather than using a single planar power line. Each conductive layer contains specific power lines that can be independently routed and optimized. This segmentation allows power lines to be distributed across different vertical levels, reducing overlap with data lines and enabling higher resolution displays while maintaining robust power delivery for high-frequency operation.
2Adaptability or versatility
If power lines are routed through multiple functional layers, then connectivity is improved, but device complexity increases
Solution Approach 1:
The insulating layers serve multiple functions simultaneously: they provide electrical isolation between different conductive layers, provide mechanical support for the stacked structure, and serve as a substrate for routing power lines through vertical vias. This multi-functionality reduces the need for additional dedicated structural elements, thereby managing complexity while enabling enhanced connectivity across layers.
Solution Approach 2:
The patent employs a nested layered structure where conductive layers are embedded within insulating layers, which themselves are embedded within the overall display substrate structure. Each layer is self-contained and can be manufactured independently, then stacked to form the complete device. This nested architecture enables complex three-dimensional routing while maintaining manufacturing simplicity through modular assembly.
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 design improves the resolution of OLED displays by optimizing the connection and layout of power lines and transistors, enabling higher resolution without compromising high-frequency driving capabilities.
Implementation Method 1
a first inclined surface and a second inclined surface that are inclined with respect to each other, are provided on a protrusion that protrudes toward the other electrode from the electrode
Implementation Method 2
the alignment film controls, in the planar direction, an alignment direction of the liquid crystal
Data Source
Figure 1~2
Figure 3
Figure 4A~4B
AI summary
Disclosed are a display substrate and a manufacturing method thereof, and a display apparatus. The display substrate includes, in a plane parallel to the display substrate, a plurality of gate lines, a plurality of data lines, a plurality of power lines and a plurality of sub-pixels arranged on a base substrate. At least one sub-pixel includes a light-emitting device and a driving circuit configured to drive the light-emitting device to emit light. The driving circuit includes a plurality of transistors and a storage capacitor. The display substrate includes, in a plane perpendicular to the display substrate, a base substrate and a plurality of functional layers. The plurality of functional layers includes a semiconductor layer, a first conductive layer, a second conductive layer, a third conductive layer and a fourth conductive layer which are sequentially arranged. A first insulating layer, a second insulating layer, a third insulating layer and a fourth insulating layer are respectively arranged between the plurality of functional layers; and in an extension direction of the gate lines. The power lines are connected with each other through at least one functional layer.