OLED Pixel Arrangement for Compact Sub-Pixel Layout
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Solution Overview
Problem
Existing OLED display technologies face challenges in achieving a compact and efficient sub-pixel arrangement that maximizes area and reduces drive current while maintaining display effectiveness.
Innovation Solution
A pixel arrangement is designed with alternating groups of sub-pixels, where each sub-pixel has specific minimum distances and orientations, allowing for a more compact and uniform distribution, facilitated by the use of multiple masks for precise evaporation of electroluminescent materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If traditional sub-pixel arrangements are used, then manufacturing is simpler, but area per sub-pixel is reduced and drive current increases
Solution Approach 1:
The pixel arrangement is segmented into multiple types (first, second, third, and fourth groups) with different sub-pixel configurations. Each group type contains specific arrangements of red, green, and blue sub-pixels, allowing the display to achieve higher area utilization through diversified segmentation while maintaining manageable manufacturing complexity through systematic categorization.
Solution Approach 2:
The patent transitions from traditional linear or grid-based sub-pixel arrangements to a multi-dimensional arrangement system where sub-pixels are organized in alternating groups along first and second directions. This dimensional reorganization enables more efficient space utilization and increases the effective area per sub-pixel while distributing the complexity across multiple organizational dimensions.
2Use of energy by moving object
If sub-pixel area is increased, then drive current is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The pixel arrangement employs asymmetric configurations within different group types, where first groups, second groups, third groups, and fourth groups have distinct sub-pixel arrangements. This asymmetry allows optimization of area utilization and drive current reduction while the systematic variation across group types provides manufacturing tolerance flexibility, reducing the burden on precision requirements compared to uniform high-precision arrangements.
Solution Approach 2:
Different regions of the display are assigned different group types with locally optimized sub-pixel arrangements. This local quality approach allows each region to be optimized for its specific requirements, achieving overall drive current reduction through cumulative area increases while distributing manufacturing precision requirements across multiple local configurations rather than demanding uniform high precision throughout.
3Area of stationary object
If alternating group arrangements are implemented, then area utilization improves, but device complexity increases
Solution Approach 1:
The alternating group arrangement is segmented into four distinct group types that repeat in a systematic pattern. This segmentation allows the complex alternating structure to be broken down into manageable units, improving area utilization through the alternating configuration while reducing the perceived complexity through the regular repetition of defined group types.
Solution Approach 2:
The pixel arrangement follows a periodic pattern where first, second, third, and fourth groups alternate in a repeating sequence along the first and second directions. This periodic action creates a predictable, rhythmic structure that improves area utilization through systematic alternation while reducing complexity through the regularity and predictability of the repeating pattern.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This arrangement enables a higher area per sub-pixel, reducing drive current and increasing the lifetime of the display device while achieving a desired display effect.
Implementation Method 1
The sub-pixels are generally formed by evaporating organic light-emitting materials on an array substrate using a fine metal mask (FMM)
Data Source
AI summary
A pixel arrangement including first groups of sub-pixels arranged in a first direction, each of the first groups including first sub-pixels and third sub-pixels arranged alternately and second groups of sub-pixels arranged in the first direction, each of the second groups including third sub-pixels and second sub-pixels arranged alternately. The first groups and the second groups are alternately arranged in a second direction intersecting the first direction. The first groups and the second groups are arranged to form third groups of sub-pixels arranged in the second direction and fourth groups of sub-pixels arranged in the second direction. The third groups and the fourth groups are alternately arranged in the first direction. Each of the third groups includes first sub-pixels and third sub-pixels arranged alternately. Each of the fourth groups includes third sub-pixels and second sub-pixels arranged alternately.