Hexagonal Sub-Pixel Arrangement for OLED Aperture Ratio
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Solution Overview
Problem
The existing 'Pentile Matrix Color Pixel Arrangement' for organic light emitting displays faces challenges in achieving an optimal aperture ratio, which affects the efficiency and lifespan of the OLED display, as well as image sticking issues.
Innovation Solution
A pixel arrangement structure using hexagonal sub-pixels, where four first sub-pixels (e.g., green) share a symmetrical axis, and two second sub-pixels (e.g., red) and two third sub-pixels (e.g., blue) are alternately arranged, minimizing dead space and optimizing the aperture ratio by forming a zig-zag pattern with different symmetry axes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the Pentile Matrix Color Pixel Arrangement is applied with square-shaped sub-pixels, then resolution is improved, but aperture ratio cannot be optimized
Solution Approach 1:
The patent applies this principle by changing sub-pixels from square-shaped to hexagonal-shaped. The hexagonal geometry allows for closer packing and reduced dead space between sub-pixels, thereby increasing the aperture ratio while maintaining the resolution benefits of the Pentile Matrix arrangement.
Solution Approach 2:
The patent changes the geometric parameter of sub-pixels from square to hexagonal shape. This parameter change enables optimal packing density and aperture ratio while preserving the color arrangement pattern needed for high resolution display.
2Ease of manufacture
If conventional pixel arrangement is used, then manufacturing is simpler, but dead space increases reducing efficiency
Solution Approach 1:
By adopting hexagonal sub-pixels instead of square sub-pixels, the patent achieves more efficient space utilization with minimal dead space. The hexagonal shape naturally packs together to form a continuous pattern, reducing wasted areas between sub-pixels and improving overall display efficiency.
3Device complexity
If standard pixel arrangement is used, then structure is simpler, but image sticking occurs
Solution Approach 1:
The hexagonal sub-pixel arrangement creates a more uniform and optimized light emission pattern that reduces image sticking. The geometric configuration improves light distribution and reduces residual images by enhancing the aperture ratio and reducing dead space.
Data Source
AI summary
A pixel arrangement structure for an organic light emitting display including a plurality of sub-pixel groups repeatedly arranged, wherein each of the sub-pixel groups includes: four first sub-pixels for emitting light of a first color and each having a hexagonal structure, two second sub-pixels for emitting light of a second color and each including two hexagonal structures sharing one side, and two third sub-pixels for emitting light of a third color and each including two hexagonal structures sharing one side. Two of the four first sub-pixels are arranged in a same column and share a symmetrical axis, and the two second sub-pixels and the two third sub-pixels are alternately arranged on either side of the symmetrical axis.