Organic Light-Emitting Display Primer Patterns for High-Purity Color Emission
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Solution Overview
Problem
Existing organic light-emitting display panels face challenges in achieving high-purity color emission due to limitations in light emission efficiency and the complexity of fabricating resonant structures for different wavelengths within the same pixel.
Innovation Solution
The proposed solution involves an organic light-emitting display panel structure with a base substrate, first and second electrode layers, and an organic light-emitting layer that includes primer patterns with varying areas and liquid-philic properties, allowing for the formation of resonant structures for red, green, and blue light emission using the same amounts of organic materials, and a method of fabricating this panel using a single nozzle to achieve uniform thickness and simplified processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If resonant structures for different wavelengths are fabricated within the same pixel, then light emission efficiency is improved, but device complexity increases
Solution Approach 1:
The patent applies local quality by creating primer patterns with different areas within the same pixel structure. Each primer pattern's area is specifically designed to control the thickness of the organic light-emitting layer in its region, enabling wavelength-specific resonant structures without requiring complex separate fabrication processes for each wavelength.
Solution Approach 2:
The patent utilizes parameter changes by varying the area of primer patterns to control the thickness of the organic light-emitting layer. By changing the primer pattern area parameter, different thicknesses are achieved, which in turn creates resonant structures for different wavelengths (red, green, blue) within the same pixel, improving light emission efficiency while maintaining fabrication simplicity.
2Productivity
If multiple nozzles are used to form different organic light-emitting patterns, then production efficiency is improved, but device complexity increases
Solution Approach 1:
The patent applies universality by designing a single nozzle system that can form all primer patterns of different areas. The single nozzle deposits organic material that is then patterned through a unified process, allowing the same fabrication tool to create all the thickness variations needed for different wavelengths. This multi-functional approach maintains high productivity while avoiding the complexity of multiple specialized nozzles.
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 approach enables the realization of high-purity red, green, and blue light emission by adjusting the thickness of organic light-emitting patterns based on primer pattern areas, improving light purity and simplifying the fabrication process, resulting in an efficient and cost-effective method for producing high-purity color organic light-emitting displays.
Implementation Method 1
the primer patterns have an affinity for liquid that is higher than an affinity for liquid of the pixel-defining layer
Data Source
AI summary
An organic light-emitting display panel and a method of fabricating the same, the panel including a base substrate; a first electrode layer including a plurality of first electrodes arranged on the base substrate; a pixel-defining layer including partition walls that extend from the base substrate and that define a plurality of pixels; an organic light-emitting layer including a plurality of organic light-emitting patterns in the pixels, respectively; and a second electrode layer on the organic light-emitting layer, wherein the organic light-emitting layer includes a plurality of primer patterns, the plurality of primer patterns being respectively formed in the pixels, being separate from one another, and respectively overlapping the first electrodes, at least one of the primer patterns has an area different area from an area of the other primer patterns, and the primer patterns have an affinity for liquid that is higher than an affinity for liquid of the pixel-defining layer.