Blue Sub-Pixel Capacitor Extension for OLED Aperture Ratio
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In organic light-emitting display devices, the blue sub-pixel typically has the lowest light-emitting efficiency, requiring a larger capacitor, which occupies a significant portion of the sub-pixel area, leading to reduced light-emitting regions and aperture ratios, and unnecessary space in red and green sub-pixels.
Innovation Solution
The capacitor of the blue sub-pixel extends into the red and green sub-pixels, allowing for a larger light-emitting area and reducing the size of storage capacitors in these sub-pixels, thereby enhancing the aperture ratio and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the blue sub-pixel uses a larger capacitor to compensate for low light-emitting efficiency, then the light-emitting efficiency is improved, but the aperture ratio is reduced due to the capacitor occupying significant sub-pixel area
Solution Approach 1:
The capacitor of the blue sub-pixel is merged with the red and green sub-pixels by extending into their respective regions. This allows the blue sub-pixel's capacitor to occupy space in adjacent sub-pixels, thereby increasing the blue sub-pixel's light-emitting area within its own boundaries while maintaining the required capacitor size for compensation.
Solution Approach 2:
The capacitor structure transitions from being confined to a two-dimensional plane within the blue sub-pixel to extending into the third spatial dimension by overlapping into adjacent red and green sub-pixel regions. This dimensional extension resolves the area conflict by utilizing space that would otherwise be wasted.
2Reliability
If the capacitor of the blue sub-pixel is enlarged to compensate for low efficiency, then the light-emitting efficiency is improved, but unnecessary space is created in the red and green sub-pixels
Solution Approach 1:
The red and green sub-pixel regions serve dual functions: they maintain their primary light-emitting functions while simultaneously providing space for the blue sub-pixel's capacitor. This multi-functionality eliminates wasted space by making the adjacent sub-pixel regions contribute to the blue sub-pixel's capacitor structure.
3Reliability
If the capacitor occupies more area within the blue sub-pixel, then the light-emitting efficiency is improved, but the light-emitting area of the blue sub-pixel is reduced
Solution Approach 1:
The blue sub-pixel's capacitor is merged with the spatial regions of the red and green sub-pixels. This merging allows the capacitor to achieve its required size for efficiency compensation without encroaching on the blue sub-pixel's light-emitting area, as the capacitor extends into adjacent sub-pixel spaces instead.
Data Source
AI summary
An organic light-emitting display device includes a plurality of sub-pixels each comprising a light-emitting portion, a thin film transistor (TFT), and a capacitor, each of the sub-pixels emitting a different color, wherein the capacitor of at least one of the plurality of sub-pixels extends into at least one adjacent one of the sub-pixels.