OLED Array Substrate Electrical Connection via Magnetic Field Alignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
OLED display devices experience a voltage drop, leading to decreased luminous efficiency due to inadequate electrical connection between the conductive layer and the second electrode.
Innovation Solution
An array substrate with a conductive layer, dielectric layer, first electrode, luminescent layer, and second electrode, featuring an electrical connection portion with a composite material of magnetic particles and conductive polymer, which provides improved conductivity and electrical connection between the conductive layer and the second electrode, and is formed using a magnetic field to increase magnetic particle crowding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a conventional conductive layer and electrode structure is used in OLED devices, then the device structure is simple and easy to manufacture, but voltage drop occurs and luminous efficiency decreases
Solution Approach 1:
The electrical connection portion is nested within the pixel spacing region, utilizing the existing structural space between pixels. The connection portion integrates the conductive layer, dielectric layer, and electrode components in a nested configuration, where the conductive layer is embedded in the dielectric layer which itself is positioned in the pixel spacing region. This nesting approach improves electrical connection without requiring additional external structures.
Solution Approach 2:
The electrical connection portion extends vertically through multiple layers (conductive layer, dielectric layer, electrode) to establish electrical connection between different horizontal planes. This vertical dimensionality allows the connection to bridge the gap between the conductive layer at the bottom and the electrode at the top, resolving the voltage drop issue by creating a three-dimensional electrical pathway rather than relying solely on two-dimensional planar connections.
2Use of energy by moving object
If the electrical connection between conductive layer and second electrode is insufficient, then the device structure remains simple, but voltage drop occurs and power consumption increases
Solution Approach 1:
The electrical connection portion employs a composite structure consisting of a conductive layer, a dielectric layer, and an electrode. The conductive layer provides electrical conductivity, the dielectric layer provides insulation and structural support, and the electrode provides additional conductive pathways. This composite material approach ensures reliable electrical connection and stable power consumption by combining the advantages of different materials.
Solution Approach 2:
The electrical connection portion is formed during the manufacturing process before the OLED device is assembled and operated. The conductive layer, dielectric layer, and electrode are sequentially deposited and patterned in advance, ensuring that the electrical connection is established before the device begins operation. This preliminary formation of the electrical connection structure prevents voltage drop from occurring during device use.
3Loss of energy
If an electrical connection portion with composite material is introduced to improve conductivity, then luminous efficiency improves, but manufacturing process complexity increases
Solution Approach 1:
The electrical connection portion is segmented into distinct functional layers: the conductive layer for electrical conduction, the dielectric layer for insulation, and the electrode for additional connectivity. Each layer can be manufactured using separate deposition and patterning steps, allowing for optimized processing of each component independently. This segmentation enables the complex composite structure to be built through a series of simpler, standardized manufacturing steps.
Solution Approach 2:
The electrical connection portion serves multiple functions simultaneously: it provides electrical conduction pathways, structural support, and insulation. The same layered structure that improves luminous efficiency by reducing voltage drop also provides mechanical stability and electrical isolation. This multi-functionality reduces the need for separate components, thereby simplifying the overall manufacturing process despite the enhanced functionality.
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
Enhances luminous efficiency by improving electrical connections, reducing power consumption, and addressing voltage drop issues in OLED devices.
Implementation Method 1
the electrical connection portion has a composite material including magnetic particles and a conductive polymer
Implementation Method 2
forming an electrical connection portion in the opening of the dielectric layer
Data Source
AI summary
The present disclosure relates to an array substrate, a method of fabricating the same, and a display panel. The array substrate includes a conductive layer formed on the base substrate, a dielectric layer formed on the conductive layer, wherein the dielectric layer has an opening exposing the conductive layer, wherein a vertical projection of the opening on the base substrate is in at least a portion of the pixel spacing region, a first electrode formed on the dielectric layer, a luminescent layer having a first portion on the first electrode and a second portion on the conductive layer in the opening, a second electrode formed on the luminescent layer, and an electrical connection portion in the second portion of the luminescent layer for providing an electrical connection from the conductive layer to the second electrode, and wherein the electrical connection portion is more conductive than the luminescent layer.