OLED Partition with Light-Shielding and Translucent Ends
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Solution Overview
Problem
The manufacturing process of OLED display devices faces challenges in maintaining reliability due to issues related to the formation and integration of organic layers and electrodes, particularly in the creation of partitions between sub-pixels, which affect the light emission and structural integrity of the display.
Innovation Solution
A display device configuration featuring a partition with a light-shielding end portion and a translucent end portion between sub-pixels, along with a manufacturing method that includes forming lower and upper electrodes, organic layers, and sealing layers, and using etching processes to define the display elements, enhances the reliability by optimizing the light exposure and development of resist layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a partition structure is formed between sub-pixels to improve light emission control, then light emission control is improved, but manufacturing complexity increases
Solution Approach 1:
The partition is divided into two distinct portions: a first portion with a light-shielding layer that reflects light, and a second portion without a light-shielding layer that allows light transmission. This segmentation enables different light control functions in different regions of the partition, improving overall light emission control while maintaining a relatively simple manufacturing process by using standard layer formation techniques.
2Manufacturing precision
If etching processes are used to define display elements and remove residual resist, then manufacturing precision is improved, but process complexity increases
Solution Approach 1:
The method performs preliminary actions by first forming the organic layer and upper electrode across the entire substrate including partition areas, then using targeted etching processes to remove only the excess material in specific regions. The light-shielding layer is formed beforehand to protect certain areas during etching. This preliminary structuring allows subsequent etching steps to precisely define display elements while minimizing the need for complex multi-step patterning processes.
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 configuration and manufacturing method improve the reliability of OLED display devices by ensuring proper light emission and structural integrity, preventing residual resist issues and ensuring effective contact between electrodes, leading to well-formed display elements.
Implementation Method 1
The first end portion has a light-shielding property
Implementation Method 2
The second end portion has translucency
Implementation Method 3
a first organic layer emitting light in accordance with a voltage between the first lower electrode and the first upper electrode
Data Source
AI summary
According to one embodiment, a display device comprises a first display element including a first lower electrode, a first upper electrode, and a first organic layer, a second display element including a second lower electrode, a second upper electrode, and a second organic layer, and a partition between the first and second display elements. The partition comprises a lower portion including first and second side surfaces, and an upper portion including a first end portion protruding from the first side surface and a second end portion protruding from the second side surface. The first end portion has a light-shielding property, and the second end portion has translucency.