Asymmetric L-Shaped Pixel Structure for OLED Resolution
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Solution Overview
Problem
Existing pixel structures in organic light emitting displays face challenges in achieving efficient fabrication with high resolution and avoiding color mixture during the manufacturing process.
Innovation Solution
The proposed pixel structure features 'L' shaped pixels with staggered and symmetrically aligned sub-pixels, where the lengths and widths of the sub-pixels are optimized to improve resolution, and specialized masks with specific slit widths and distances are used to fabricate the organic light emitting layers, ensuring accurate placement and avoiding color mixture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional pixel structures are used, then fabrication process is simpler, but resolution is lower and color mixture occurs
Solution Approach 1:
The pixel structure is divided into three distinct sub-pixels (red, green, blue) with different shapes and sizes, each responsible for a specific color component. This segmentation allows for precise control of light emission from each sub-pixel, improving resolution and preventing color mixture by ensuring that each color is emitted from its designated region only.
Solution Approach 2:
The patent employs asymmetric sub-pixel designs where the red, green, and blue sub-pixels have different shapes and dimensions rather than identical symmetric structures. This asymmetry optimizes the light emission characteristics of each color and prevents overlap between adjacent sub-pixels, thereby achieving higher resolution and avoiding color mixture.
2Illumination intensity
If sub-pixel areas are increased to improve light emission, then brightness is improved, but color mixture between adjacent sub-pixels occurs
Solution Approach 1:
Each sub-pixel is designed with specific local characteristics including different shapes, sizes, and positions optimized for its color function. The red, green, and blue sub-pixels have distinct geometries that maximize their light emission efficiency while maintaining appropriate spacing and boundaries to prevent color mixture, achieving high brightness without compromising color purity.
3Manufacturing precision
If mask slit width is decreased to improve placement precision, then manufacturing precision is improved, but fabrication difficulty increases
Solution Approach 1:
The mask design incorporates pre-calculated and pre-positioned slits with specific widths and spacing that are optimized before fabrication begins. The slit dimensions and positions are predetermined based on the asymmetric sub-pixel geometry, allowing the fabrication process to proceed with standard techniques while achieving high placement precision through careful preliminary mask design rather than requiring complex real-time adjustments.
Data Source
AI summary
A pixel structure in an organic light emitting display panel includes a plurality of pixels. Each pixel includes a first sub-pixel, a second sub-pixel, and a third sub-pixel. Lengths of the first sub-pixel, the second sub-pixel, and the third sub-pixel are arranged along a first direction. Widths of the first sub-pixel, the second sub-pixel, and the third sub-pixel is arranged along a second direction. A length of the first sub-pixel is greater than a length of the second sub-pixel along the first direction and a length of the third sub-pixel along the first direction. The first sub-pixel, the second sub-pixel, and the third sub-pixel are orderly arranged along the second direction.