OLED Pixel Structure Asymmetric Sub-pixel Layout for Color Shift
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Solution Overview
Problem
In OLED display panels, the differing lifespans of sub-pixels due to varying light-emitting materials lead to color shift issues and inefficient aperture area utilization, as the standard RGB layout results in lower utilization ratios and uneven luminance decay.
Innovation Solution
A pixel structure where the first and second sub-pixels are on the same side of the third sub-pixel, with areas increasing sequentially, and the third sub-pixel includes a body portion and an extension portion to balance luminance life-spans and enhance aperture area utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the area of sub-pixels with slower luminous brightness decay is reduced, then the gap in light-emitting life-spans between sub-pixels of different colors is reduced, but the utilization ratio of the pixel's aperture area is lowered
Solution Approach 1:
The patent applies asymmetric area allocation to sub-pixels, where the third sub-pixel (blue) has a larger area than the first and second sub-pixels (red and green). This asymmetric design compensates for the different luminance decay rates of various color sub-pixels, extending the overall display lifespan by balancing the contribution of each sub-pixel type.
Solution Approach 2:
The patent implements different area qualities for different sub-pixel types based on their specific luminance decay characteristics. Each sub-pixel type receives an area allocation optimized for its particular performance characteristics, allowing the system to achieve overall optimality rather than uniform treatment.
2Stability of the object's composition
If the standard RGB layout is used, then uniform color distribution is achieved, but color shift issues occur at later usage stages due to different light-emitting material lifespans
Solution Approach 1:
The patent performs preliminary area adjustment of sub-pixels before the display enters prolonged usage. By pre-configuring the third sub-pixel with a larger area, the system proactively compensates for the faster decay of blue sub-pixels, preventing color shift issues from developing during extended operation.
Solution Approach 2:
The patent changes the area parameter of the third sub-pixel relative to the first and second sub-pixels. This parameter modification balances the luminance decay characteristics of different sub-pixel types, ensuring consistent color performance over the display's operational lifecycle.
Data Source
AI summary
A pixel structure and a display panel are provided. The pixel structure includes a plurality of pixel units. Each pixel unit includes a first sub-pixel, a second sub-pixel and a third sub-pixel. The first sub-pixel and the second sub-pixel are located on the same side of the third sub-pixel along the first direction. Each of the first sub-pixel and the second sub-pixel is arranged opposite to the third sub-pixel, and the first sub-pixel is arranged opposite to the second sub-pixel along the second direction. The areas of the first sub-pixel, the second sub-pixel and the third sub-pixel increase sequentially. The third sub-pixel includes a body portion and an extension portion. The body portion extends in the second direction, the extension portion is connected to the body portion and extends in the first direction towards the first sub-pixel and is arranged opposite to the first sub-pixel.