OLED Pixel Arrangement Structure for Higher PPI and Lower Current Density
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Solution Overview
Problem
Existing OLED display panels face challenges in improving display effect and pixel density due to manufacturing limitations, leading to difficulties in reducing pixel size and gap, which affects resolution and aperture ratio.
Innovation Solution
A novel pixel arrangement structure is introduced, featuring a specific arrangement of sub-pixels with varying shapes, sizes, and orientations to optimize pixel density and reduce current density, allowing for higher PPI and increased aperture ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional pixel arrangement is used, then manufacturing is simpler, but pixel density and resolution are limited
Solution Approach 1:
The patent divides each pixel into multiple sub-pixels (first sub-pixel, second sub-pixel, third sub-pixel, fourth sub-pixel, fifth sub-pixel) with different colors and positions. This segmentation allows higher pixel density by packing more emitting elements into the same space while maintaining manufacturability through systematic arrangement patterns.
Solution Approach 2:
The patent introduces a fifth sub-pixel in addition to the conventional four sub-pixels, adding a dimensional element to the pixel structure. The fifth sub-pixel is positioned at a specific location with a specific color, creating a five-sub-pixel arrangement that increases density without proportionally increasing manufacturing complexity.
2Manufacturing precision
If pixel size is reduced to increase PPI, then resolution improves, but current density increases and service life decreases
Solution Approach 1:
The patent assigns different colors to different sub-pixels (first sub-pixel: red, second sub-pixel: green, third sub-pixel: blue, fourth sub-pixel: green, fifth sub-pixel: blue). This local differentiation allows for optimized current distribution and reduced current density in individual sub-pixels, thereby extending service life while maintaining high resolution through the multi-color arrangement.
3Illumination intensity
If pixel gap is reduced to increase aperture ratio, then display effect improves, but manufacturing difficulty increases
Solution Approach 1:
The patent merges multiple sub-pixels (first, second, third, fourth, and fifth sub-pixels) into a single pixel unit structure. This merging allows the aperture ratio to be increased by reducing the overall pixel gap while maintaining manufacturability through the integrated design of multiple sub-pixels sharing common structures and positioning.
Data Source
AI summary
A pixel arrangement structure, a display panel, a display apparatus and a mask group are provided. The pixel arrangement structure includes basic pixel units in first and/or second directions. Each basic pixel unit includes five sub-pixels, first to third sub-pixels are of different colors, and third to fifth sub-pixels are of a same color; the first sub-pixel includes opposite first and second sides in the first direction, and opposite third and fourth sides in the second direction; and the second sub-pixel is on and separated from the third side of the first sub-pixel, the third sub-pixel is on and separated from the first side of the first sub-pixel, fourth and fifth sub-pixels are both on the fourth side of the first sub-pixel and are separated from the fourth side of the first sub-pixel, and are separated from each other in the first direction.