OLED Panel Conduction Layer Segmentation for Brightness Uniformity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current display panels face issues of non-uniform brightness due to high resistance in power signal conduction lines and low opening rates caused by anode through holes, which obstruct display areas.
Innovation Solution
Incorporating a conduction layer with first and second conduction portions, where the first conduction portion is connected to power signal conduction lines and the second conduction portion is connected to pixel electrodes, reducing total resistance and allowing for flexible through hole placement that does not obstruct display areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If power signal conduction lines with small cross-sectional area are used, then the number of conduction lines can be reduced, but the resistance increases causing non-uniform brightness
Solution Approach 1:
The conduction layer is segmented into multiple independent conduction portions (first conduction portions and second conduction portions) that are insulated from each other. Each conduction portion independently conducts power signals to different pixel units, distributing the current load and reducing resistance effects while maintaining a compact structure.
Solution Approach 2:
The conduction layer acts as an intermediary between the power signal conduction lines and the pixel electrodes. It includes first conduction portions connected to power signal conduction lines and second conduction portions connected to pixel electrodes, with insulation layers between them, enabling flexible routing and reduced resistance.
2Reliability
If anode through holes are defined in the display panel, then electrical connection is achieved, but the display area is blocked reducing opening rate
Solution Approach 1:
The connection structure transitions from a planar through-hole approach to a multi-layer vertical structure. The pixel electrode extends through an electrode through hole in the insulation layer to connect with the second conduction portion, allowing the connection to be made in the vertical dimension rather than blocking the horizontal display area.
Solution Approach 2:
The electrode through hole is positioned in a specific location where it does not overlap with the light-emitting area of the pixel. The pixel electrode extends through this through hole to connect with the second conduction portion, achieving electrical connection while preserving the display quality and opening rate in the visible area.
3Adaptability or versatility
If power signal conduction lines extend to all pixel units, then all pixels receive power, but resistance causes current attenuation
Solution Approach 1:
The power distribution network is segmented into multiple parallel conduction paths through the conduction layer. The first conduction portions connect to power signal conduction lines and the second conduction portions connect to pixel electrodes, creating multiple independent current paths that reduce overall resistance and minimize voltage attenuation across the display panel.
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 configuration results in more uniform display brightness and increased opening rates by minimizing power signal attenuation and avoiding blockage of display areas.
Implementation Method 1
the organic light emitting diode (OLED) display terminal... each of the plurality of pixel units including a drain electrode, a pixel electrode and a light-emitting layer... the pixel electrode extends through the electrode through hole to be electrically connected with the second conduction portion
Data Source
AI summary
Provided are an organic light-emitting display panel and a display terminal. The organic light-emitting display panel comprises: a substrate; pixel units located on the substrate, each pixel unit comprising a drain electrode, a pixel electrode and a light-emitting layer; power signal conduction lines located on the substrate, a conduction layer and a first insulation layer being located between the conduction layer and the pixel electrode; the conduction layer comprising a first conduction portion and second conduction portions insulated from the first conduction portion, wherein the second conduction portions are insulated from each other, the first conduction portion is electrically connected with the power signal conduction lines; and the second conduction portions are electrically connected with the drain electrodes in one-to-one correspondence; and an electrode through hole is defined in the first insulation layer, the pixel electrode extends through the electrode through hole to electrically connect with the second conduction portion.