OLED Pixel Arrangement for High Aperture Ratio and Definition
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Solution Overview
Problem
Conventional organic light emitting display devices face limitations in aperture ratio and definition, particularly in high-resolution displays due to sub-pixel arrangements that reduce image quality and increase black matrix interference.
Innovation Solution
A pixel arrangement where red, blue, and green sub-pixels are alternately arranged in a specific pattern, with green sub-pixels being more numerous and positioned to enhance column and row configurations, increasing the number of red and blue sub-pixels while maintaining a balanced distance, thereby improving aperture ratio and display definition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional sub-pixel arrangements are used, then manufacturing is simpler, but aperture ratio and definition are reduced
Solution Approach 1:
The pixel arrangement is segmented into distinct columns: first columns containing alternating red and blue sub-pixels, and second columns containing green sub-pixels. This segmentation allows optimization of each column type independently, achieving higher aperture ratio through specialized arrangements while maintaining overall manufacturability through standardized column modules.
Solution Approach 2:
Different local arrangements are applied to different column types: first columns use alternating red-blue patterns optimized for their geometry, while second columns use green sub-pixel arrangements optimized for green emission characteristics. This local quality approach allows each region to be optimized for its specific function while contributing to overall high definition and aperture ratio.
2Manufacturing precision
If more red and blue sub-pixels are added, then image quality improves, but black matrix interference increases
Solution Approach 1:
The harmful black matrix elements are extracted and minimized by optimizing the pixel arrangement to reduce their number and impact. The specialized column arrangements allow for reduced black matrix area while maintaining the increased number of red and blue sub-pixels needed for high image quality.
Solution Approach 2:
The arrangement converts the potential harm of increased black matrix interference into benefit by strategically positioning green sub-pixel columns between red-blue alternating columns. This arrangement uses the green columns as spacing elements that reduce black matrix interference between red and blue sub-pixels while maintaining high sub-pixel density for improved image quality.
3Manufacturing precision
If sub-pixels are densely packed, then definition improves, but aperture ratio decreases
Solution Approach 1:
The solution moves from considering only horizontal packing to utilizing vertical arrangement in the column dimension. By creating distinct first columns (red-blue alternating) and second columns (green), the arrangement achieves high definition through vertical stacking while maintaining aperture ratio through optimized horizontal spacing and the use of alternating patterns that reduce black matrix requirements.
Data Source
AI summary
A pixel arrangement of an organic light emitting display device includes first sub-pixels and second sub-pixels alternately arranged in a first direction to define a plurality of first columns along the first direction, and third sub-pixels arranged along the first direction to define a plurality of second columns along the first direction among the first columns, two second columns of the third sub-pixels being arranged among three first columns of the alternating first and second sub-pixels.