OLED Pixel Structure Dislocated Sub-Pixel Arrangement
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Solution Overview
Problem
High-resolution OLED displays face challenges with metal masks that are prone to deformation under magnetic fields, leading to color mixing and increased production costs due to the need for fine, fragile masks with narrow openings.
Innovation Solution
A pixel structure with sub-pixels arranged in a dislocated pattern across rows, allowing for wider openings in the metal mask, enhancing mechanical stability and reducing the risk of deformation, while maintaining high resolution and improving production efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If fine metal mask with narrow openings is used to achieve high resolution, then pixel density is improved, but mechanical stability deteriorates and deformation risk increases
Solution Approach 1:
The patent transitions from traditional aligned pixel arrangements to a staggered/dislocated arrangement where odd and even rows are offset by half a pixel width. This dimensional repositioning allows metal mask openings to be wider while maintaining high pixel density, as the staggered pattern distributes material more efficiently and reduces the need for narrow spacing between adjacent openings.
Solution Approach 2:
The patent introduces asymmetry in the pixel arrangement by displacing odd rows relative to even rows. This asymmetric staggered pattern creates a more robust metal mask structure with wider openings, eliminating the symmetry constraint of traditional aligned arrangements that forces narrow opening widths and compromises mechanical stability.
2Ease of manufacture
If traditional aligned pixel arrangement is used, then manufacturing simplicity is maintained, but metal mask openings must be narrow reducing resolution
Solution Approach 1:
The patent resolves this contradiction by introducing a staggered arrangement where odd and even rows are offset. This dimensional change allows the metal mask to have wider openings for easier manufacturing while achieving higher resolution through the optimized spatial distribution of pixel openings across staggered rows.
3Strength
If metal mask openings are made wider to improve mechanical stability, then deformation resistance is improved, but pixel density decreases
Solution Approach 1:
The staggered row arrangement enables wider openings that improve mechanical stability while maintaining high pixel density. The offset pattern optimizes the spatial distribution of openings, allowing each opening to be wider without increasing the overall pixel pitch, thus achieving both deformation resistance and high resolution simultaneously.
Solution Approach 2:
The patent makes the metal mask less fragile and more durable through the staggered arrangement, reducing the need for frequent replacements due to deformation. This extends the operational life of the metal mask while maintaining manufacturing efficiency.
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
The dislocated sub-pixel arrangement strengthens the metal mask, enabling the production of smaller pixel units with improved resolution and reduced production costs by widening the openings, thus addressing the limitations of traditional slit and slot modes.
Implementation Method 1
The OLED display technique has the property of self-illumination... the organic material can glow when an electric current passes through it
Implementation Method 2
The light-emitting layer of the OLED screen is composed by organic light-emitting components formed on corresponding pixel locations on an array substrate by using evaporation film technology to organic materials
Data Source
AI summary
A pixel structure for OLED display is disclosed. The pixel structure includes multi-row pixel unit groups, each pixel unit group includes a plurality of pixel units arranged repeatedly is sequence, and each pixel unit includes a first sub pixel, a second sub pixel and a third sub pixel, wherein the same sub pixels of the pixel units in adjacent two rows are arranged in dislocation in a horizontal direction. The pixel structure can widen the distance between the corresponding openings of the sub pixels when making the corresponding metal mask to enhance the strength of the metal mask that a pixel unit of a smaller size can be produced under the consideration of process condition, so as to improve the resolution of the OLED display.