Organic EL Device Substrate Segmentation for Aperture Ratio
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Solution Overview
Problem
Existing organic electro luminescence devices face limitations in aperture ratio and light efficiency due to the complex process of forming array elements and electro luminescent diodes on the same substrate, which results in reduced yield and restricted application to high-definition products.
Innovation Solution
The solution involves forming array elements and electro luminescent diodes on separate substrates, with a conductive spacer electrically connecting them, allowing for independent optimization of each component and enhancing aperture ratio and light efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If array elements and electro luminescent diodes are formed on the same substrate, then the device structure is integrated, but the aperture ratio and light efficiency are reduced
Solution Approach 1:
The device is divided into two separate substrates: the first substrate contains the array elements, and the second substrate contains the electro luminescent diodes. This segmentation allows each component to be optimized independently, increasing the aperture ratio and light efficiency while maintaining structural integration through the conductive spacer connection.
2Volume of moving object
If array elements and electro luminescent diodes are formed on the same substrate, then the device is compact, but the manufacturing yield is reduced
Solution Approach 1:
By segmenting the device into two separate substrates, each substrate can be manufactured and tested independently, improving the overall manufacturing yield. The first substrate with array elements and the second substrate with electro luminescent diodes can be produced separately with higher yields, and then connected through conductive spacers.
3Ease of manufacture
If array elements and electro luminescent diodes are formed on the same substrate, then the fabrication process is simplified, but the light efficiency is reduced
Solution Approach 1:
The fabrication process is segmented into two independent processes: forming array elements on the first substrate and forming electro luminescent diodes on the second substrate. This allows each process to be optimized for its specific function, improving light efficiency while maintaining overall fabrication simplicity through modular assembly using conductive spacers.
4Device complexity
If array elements and electro luminescent diodes are formed on the same substrate, then the device is structurally simple, but the aperture ratio is restricted
Solution Approach 1:
The device structure transitions from a planar single-substrate configuration to a three-dimensional multi-substrate configuration. By stacking the first substrate (array elements) and second substrate (electro luminescent diodes) with conductive spacers providing vertical electrical connection, the aperture ratio is increased while maintaining structural simplicity through the regular spacer arrangement.
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 increases product yield, aperture ratio, and light efficiency, making it suitable for high-definition products and large-sized screens while maintaining stability and reliability.
Implementation Method 1
an organic electro luminescent layer and a second electrode formed on the first electrode of the first region
Data Source
AI summary
An organic electro luminescence device and a fabrication method thereof are provided. An array element is formed on a first substrate and an electro luminescent diode is formed on a second substrate. The array element and the electro luminescent diode are electrically connected together by a spacer. A separator divides a sub pixel into a first region and a second region. In the electro luminescent diode, an anode electrode is formed over the first and second regions. An organic electro luminescent layer and a cathode electrode are formed on the anode electrode of one of the first and second regions.