OLED Display Panel Asymmetric Subpixel Layout for Edge Defects
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Solution Overview
Problem
Existing OLED display technologies face challenges in achieving balanced light-emitting areas for red, green, and blue sub-pixels, leading to issues such as pattern edge sawtooth, color edge phenomenon, and screen color shift.
Innovation Solution
The display panel incorporates a novel Real RGB arrangement with varying effective light-emitting areas for blue, green, and red sub-pixels, where the blue sub-pixel has a larger effective light-emitting area than the red and green sub-pixels, and the first electrodes of different sub-pixels are arranged to minimize overlap with data lines, optimizing the aperture ratio and reducing load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the effective light-emitting areas of red, green, and blue sub-pixels are made equal, then the display achieves balanced color emission, but this causes pattern edge sawtooth and color edge phenomena that degrade display quality
Solution Approach 1:
The patent applies asymmetry by deliberately designing different effective light-emitting areas for red, green, and blue sub-pixels. Specifically, the blue sub-pixel has a larger effective light-emitting area than the red and green sub-pixels, which compensates for the inherent asymmetries in OLED manufacturing and eliminates pattern edge sawtooth and color edge phenomena while maintaining display quality
Solution Approach 2:
The patent applies local quality by optimizing the effective light-emitting area of each sub-pixel according to its specific characteristics and requirements. Each sub-pixel type (red, green, blue) has its effective light-emitting area tailored to its specific needs, with the blue sub-pixel having a larger area to compensate for its higher voltage requirements and shorter lifetime
2Productivity
If the first electrodes of sub-pixels are arranged to minimize overlap with data lines, then the aperture ratio is optimized and load is reduced, but this increases device complexity in terms of arrangement precision
Solution Approach 1:
The patent applies dimensionality change by arranging first electrodes of different sub-pixels at different vertical positions relative to data lines. Specifically, the first electrode of the blue sub-pixel is positioned at a first vertical position that does not overlap with the data line, while the first electrodes of red and green sub-pixels are positioned at a second vertical position that does overlap with the data line, achieving optimized aperture ratio and load distribution through vertical dimension utilization
Solution Approach 2:
The patent applies segmentation by dividing the pixel structure into distinct functional regions with different electrode arrangements. The blue sub-pixel has its first electrode separated from the data line in the vertical direction, while red and green sub-pixels have overlapping arrangements, creating segmented patterns that optimize both aperture ratio and manufacturing feasibility
Data Source
AI summary
A display panel and a display device are provided. The display panel includes: a plurality of first pixel units, a plurality of second pixel units, a plurality of third pixel units and a plurality of first data lines. An effective light-emitting area of the first pixel unit is larger than an effective light-emitting area of the second pixel unit, and larger than an effective light-emitting area of the third pixel unit; an orthographic projection of the first data line on the base substrate is not overlapped with an orthographic projection of any one of the first electrode of the first pixel unit, the first electrode of the second pixel unit, and the first electrode of the third pixel unit on the base substrate.