OLED Display Panel Electrode Layout for Uniform Large-Area Luminance
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Solution Overview
Problem
Display panels with organic light emitting elements face issues of non-uniform luminance as the area of the electronic device increases, affecting their reliability.
Innovation Solution
A display panel design featuring a circuit layer with a first electrode and an auxiliary electrode, a charge generation layer with a curved surface, and a second organic layer with a protrusion surrounding an opening region, connected to the auxiliary electrode, along with a specific manufacturing method using a laser to form the opening and protrusion, ensuring uniform luminance and improved reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the area of the electronic device is increased, then the display panel can cover a larger display area, but the luminance becomes non-uniform
Solution Approach 1:
The patent divides the display panel into multiple pixel units, each with independent light emitting elements and auxiliary electrodes. This segmentation allows each pixel to be controlled independently, ensuring uniform luminance across the entire large-area display panel by preventing cumulative effects that would otherwise cause non-uniformity.
Solution Approach 2:
The patent introduces auxiliary electrodes and charge generation layers at specific locations within each pixel structure to locally adjust electrical charge distribution. This local quality modification ensures that each region of the display panel maintains optimal electrical characteristics, preventing luminance non-uniformity even as the overall display area increases.
2Reliability
If auxiliary electrodes and charge generation layers are added to improve luminance uniformity, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent combines the charge generation layer with the auxiliary electrode structure, creating an integrated component that performs multiple functions (charge generation, electrical connection, and structural support) simultaneously. This merging reduces the number of separate components and simplifies the manufacturing process while maintaining luminance uniformity.
Solution Approach 2:
The auxiliary electrode structure is designed to serve multiple functions: it provides electrical connection between layers, generates and distributes charge to improve luminance uniformity, and maintains structural integrity of the display panel. This multi-functionality reduces the need for additional specialized components, thereby limiting complexity increase.
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
The design achieves uniform luminance and enhances the reliability of the display panel by optimizing the electrical connection and structural features, addressing non-uniformity issues.
Implementation Method 1
a second opening region being defined in the first organic layer; and a third opening region being defined in the second organic layer
Data Source
AI summary
A display panel includes a circuit layer on a base substrate, a first electrode and an auxiliary electrode disposed on the circuit layer, and spaced apart from each other, a charge generation layer on the first electrode and the auxiliary electrode, a first opening region being defined in the charge generation layer, a second electrode on the charge generation layer, a first organic layer disposed between the first electrode and the charge generation layer, a second opening region being defined in the first organic layer, and a second organic layer disposed between the charge generation layer and the second electrode, a third opening region being defined in the second organic layer. The second electrode is electrically connected to the auxiliary electrode through the first to third opening regions, and the second organic layer includes a protrusion adjacent to the third opening region.