OLED Pixel Arrangement with Asymmetric Blue Green Red Sizes
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Solution Overview
Problem
The lifespan of organic light emitting diode (OLED) displays is reduced due to differences in the lifespan of organic layers emitting different colors, leading to a decrease in the overall aperture ratio when pixels with shorter lifespans are made larger to compensate, resulting in increased gaps between pixels and reduced display efficiency.
Innovation Solution
A pixel arrangement structure where the first pixel, emitting blue light, has a larger area than the second and third pixels, emitting green and red light respectively, with different planar shapes and sizes to minimize the gap between them, thereby maintaining the aperture ratio while considering the lifespan of each organic layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If pixels with shorter lifespan are made larger to compensate for lifespan differences, then the overall lifespan of the OLED display is improved, but the aperture ratio decreases due to increased gaps between pixels
Solution Approach 1:
The patent applies local quality by assigning different sizes to different pixel types based on their specific lifespan characteristics. Blue pixels, which have shorter lifespan, are made larger than red or green pixels, allowing each pixel type to have optimized dimensions matched to its operational requirements rather than using a uniform size for all pixels.
Solution Approach 2:
The patent implements asymmetry by creating an asymmetric pixel arrangement where blue pixels have different dimensions compared to red and green pixels. This asymmetric design allows the display to account for lifespan differences among color channels while maintaining overall display efficiency and minimizing gaps through non-uniform pixel sizing.
2Duration of action of stationary object
If pixels are made larger to compensate for shorter lifespan, then the lifespan is improved, but the gaps between pixels increase reducing display efficiency
Solution Approach 1:
The patent applies local quality by assigning different sizes to different pixel types based on their specific lifespan characteristics. Blue pixels, which have shorter lifespan, are made larger than red or green pixels, allowing each pixel type to have optimized dimensions matched to its operational requirements rather than using a uniform size for all pixels.
Solution Approach 2:
The patent addresses the gap issue by optimizing pixel arrangement in multiple spatial dimensions. By carefully designing the relative positions and orientations of differently sized pixels, the patent minimizes gaps between pixels of different types while maintaining the larger size needed for lifespan compensation, thus preserving display efficiency.
Data Source
AI summary
A pixel arrangement structure for an organic light emitting diode display includes a first pixel, a second pixel and a third pixel. The first pixel has a larger area than the second pixel and the third pixel, and the first pixel, the second pixel and the third pixel have different planar shapes relative to each other.