OLED Display Partition Structure for Light Leakage Prevention
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Solution Overview
Problem
Current OLED display devices face challenges in enhancing display quality, particularly in preventing light leakage and color mixture between subpixels, which affects the overall image clarity and color accuracy.
Innovation Solution
The implementation of a display device configuration that includes a lower electrode, a rib with pixel apertures, a conductive partition, an organic layer, an upper electrode, a first inorganic sealing layer, and color filters positioned between the sealing layer and a resin layer, along with a light-shielding layer to prevent light leakage and color mixture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional OLED display structure is used, then the device complexity is low, but light leakage and color mixture between subpixels occur, degrading display quality
Solution Approach 1:
The display device is divided into multiple subpixels (red, green, blue) with each subpixel containing its own lower electrode, organic layer, and upper electrode. The partition structure further segments the display area into distinct subpixel regions, preventing light leakage between different color subpixels and improving overall display quality.
Solution Approach 2:
A light-shielding layer is introduced as an intermediary component between adjacent subpixels to block light from leaking into neighboring subpixels. Additionally, a color filter is positioned between the first sealing layer and the resin layer to serve as an intermediary that prevents color mixture while allowing the unified thin film process to achieve the same emission colors.
2Manufacturing precision
If separate processes are used for each subpixel, then color accuracy can be optimized, but the manufacturing process becomes more complex and time-consuming
Solution Approach 1:
The patent employs a unified thin film process to form the organic layer across all subpixels simultaneously, merging multiple separate deposition processes into a single operation. This approach maintains color accuracy for red, green, and blue subpixels while significantly improving manufacturing efficiency and reducing production time.
Solution Approach 2:
The color filter layer serves multiple functions: it acts as a light-shielding barrier, a color-filtering element, and a structural component in the encapsulation stack. This multi-functionality reduces the need for additional separate processes while maintaining color accuracy and improving manufacturing 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 configuration improves display quality by effectively preventing light leakage and color mixture, ensuring better image clarity and color accuracy across subpixels, while also allowing for the same emission colors to be achieved through a unified thin film process.
Implementation Method 1
an organic layer which covers the lower electrode through the pixel aperture and emits light based on application of voltage
Data Source
AI summary
According to an embodiment, a display device includes a lower electrode, a rib including a pixel aperture, a partition including a conductive lower portion on the rib and an upper portion protruding from a side surface of the lower portion, an organic layer covering the lower electrode, an upper electrode which is in contact with the side surface of the lower portion, a first sealing layer which is formed of an inorganic material and covers a display element, a first resin layer located above the first sealing layer, and a color filter located between the first sealing layer and the first resin layer.