Organic EL Device Continuous Organic Layer Slit Insulator
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Solution Overview
Problem
Existing organic electroluminescence (EL) display technologies face challenges in producing full-color displays without the need for a backlight, achieving high response speed, wide viewing angles, and high contrast, while also being prone to moisture-related deterioration due to the use of partitions that can spread moisture and cause defects.
Innovation Solution
The design incorporates a structure with a continuous organic layer and slits in the second interlayer insulator, eliminating the need for partitions between organic EL elements, which allows for broader light emission areas, increased aperture ratio, and reduced moisture spread, thereby enhancing durability and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If partitions are used between organic EL elements, then moisture spread is prevented, but light emission area is reduced and aperture ratio decreases
Solution Approach 1:
The invention extracts and removes the partition structure from the organic EL display device. By eliminating the partitions that separated adjacent organic EL elements, the light emission area is maximized and aperture ratio is increased, while moisture prevention is maintained through alternative means (sealing structures and encapsulation layers)
Solution Approach 2:
The invention merges adjacent organic EL elements by removing the partitions between them. This allows the emitting layers of different colored pixels to extend continuously across the display area, creating a unified structure that increases the overall light emission area while maintaining color differentiation through selective emission from different organic compounds
2Stability of the object's composition
If partitions are used between organic EL elements, then structural support is provided, but manufacturing complexity increases and production difficulty rises
Solution Approach 1:
The partition structure is extracted and removed from the device architecture. This simplifies the manufacturing process by eliminating the need to fabricate and assemble partition components, reducing production steps and lowering manufacturing complexity while maintaining structural integrity through the substrate and encapsulation layers
Solution Approach 2:
The emitting layer structure serves multiple functions: it provides the light-emitting function, acts as a barrier between adjacent elements, and eliminates the need for separate partition structures. This multi-functionality simplifies the overall device architecture and manufacturing process
3Ease of manufacture
If emitting layers with different emission spectra are formed in patterns using fine masks, then full-color display is achieved, but production time increases and productivity decreases
Solution Approach 1:
The invention merges the formation of different colored emitting layers into a single continuous vacuum evaporation process. By removing the need for separate masking steps for each color, the production process is streamlined into one continuous operation, significantly increasing productivity while maintaining full-color display capability through the use of different organic compounds with specific emission spectra
Solution Approach 2:
The vacuum evaporation process is made continuous by eliminating interrupting masking steps. The emitting layers for red, green, and blue pixels are deposited in a continuous sequence without breaking the vacuum or repositioning masks, maintaining continuous useful action and maximizing production efficiency
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 simplifies the production process, increases the light emission area, reduces moisture-induced deterioration, and maintains high performance by eliminating the need for partitions and minimizing moisture spread, resulting in improved organic EL display characteristics.
Implementation Method 1
an organic EL element is a light-emitting element
Data Source
AI summary
According to one embodiment, an organic EL device includes an insulating substrate, first and second interlayer insulators, pixel electrodes, an organic layer, and a counter electrode. The first interlayer insulator is positioned above the insulating substrate. The second interlayer insulator is positioned on the first interlayer insulator and provided with slits. The pixel electrodes are arranged on the second interlayer insulator. Two or more of the pixels are adjacent to each other with one of regions corresponding to the slits interposed therebetween. The organic layer is positioned on the pixel electrodes and includes an emitting layer. The counter electrode is positioned above the organic layer.