AMOLED Pixel Arrangement Structure for High Density Displays
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Solution Overview
Problem
Current AMOLED display technologies face challenges in achieving high pixel density due to limitations in Fine Metal Mask (FMM) technology, making it difficult to produce displays with pixel densities greater than 300 ppi.
Innovation Solution
A pixel arrangement structure where first and second pixels are alternately arranged in rows and columns, with sub-pixels forming triangular and inverted triangular distributions, allowing for reduced sub-pixel density while maintaining high resolution, enabling the production of displays with pixel densities of 500 ppi or higher.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional FMM technology is used to increase pixel density, then display resolution is improved, but manufacturing complexity and cost increase significantly
Solution Approach 1:
The patent employs asymmetric pixel arrangements including triangular distributions and inverted triangular distributions of sub-pixels. This asymmetric layout allows for reduced sub-pixel density while maintaining high display resolution, thereby simplifying the FMM manufacturing process and reducing costs without sacrificing pixel density performance
Solution Approach 2:
The patent introduces staggered and shifted arrangements of repeating units across multiple dimensions (row direction and column direction). By utilizing misaligned repeating units in different dimensions, the design achieves high pixel density through spatial optimization rather than simply increasing sub-pixel count, thus reducing manufacturing complexity
2Manufacturing precision
If sub-pixel density is increased to achieve high pixel density, then display resolution is improved, but manufacturing cost increases
Solution Approach 1:
The asymmetric triangular and inverted triangular sub-pixel distributions enable high pixel density to be achieved with fewer sub-pixels per pixel. This reduces the complexity of the FMM mask design and fabrication, directly lowering manufacturing costs while maintaining the required pixel density
Solution Approach 2:
The patent divides the display into repeating units with specific asymmetric patterns. This segmentation allows for standardized, cost-effective manufacturing processes while achieving high overall pixel density through the strategic arrangement of these modular units
3Ease of manufacture
If conventional stripe RGB sub-pixel arrangement is used, then manufacturing is simplified, but pixel density greater than 300 ppi cannot be achieved
Solution Approach 1:
The patent replaces the conventional symmetric stripe RGB arrangement with asymmetric triangular and inverted triangular distributions. This asymmetric configuration enables pixel density greater than 300 ppi while maintaining manufacturing feasibility through standardized repeating unit patterns
Solution Approach 2:
The patent transitions from simple linear stripe arrangements to two-dimensional staggered and shifted patterns. By utilizing misaligned repeating units arranged in both row and column directions, the design achieves high pixel density that exceeds the 300 ppi limitation of conventional stripe arrangements
Data Source
AI summary
A pixel arrangement structure are provided, which includes a plurality of repeating units. Each of the plurality of repeating units includes two first sub-pixels, one second sub-pixel, and one third sub-pixel. Each of the first sub-pixel, the second sub-pixel and the third sub-pixel includes a pixel defining layer, the pixel defining layer includes a pixel defining layer opening to define an effective light emitting region of each sub-pixel; a plurality of first sub-pixels are arranged along the second direction to form a plurality of first sub-pixel groups, orthographic projections of pixel defining layer openings of the first sub-pixels in adjacent ones of the plurality of first sub-pixel groups on a straight line parallel to the second direction do not overlap each other.