Shared Pixel Arrangement for OLED Resolution and FMM Wrinkling
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Solution Overview
Problem
Conventional OLED display devices face challenges in achieving high resolution and production quality due to low resolution and the complexity of high-density fine metal mask (FMM) technology, which increases the risk of wrinkling during FMM opening.
Innovation Solution
A pixel arrangement structure where adjacent sub-pixels share partial sub-pixels, forming a shared pixel with at most two sub-pixels from the same repeating unit, arranged in a horizontal, vertical, or oblique direction, improving sensory resolution while maintaining the same sub-pixel arrangement density, and using shared sub-pixel structures to reduce the requirement for high-density FMM.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high-density fine metal mask (FMM) technology is used to achieve high resolution, then resolution is improved, but the risk of wrinkling during FMM opening increases
Solution Approach 1:
The pixel array is segmented into repeating units with shared sub-pixels. Each repeating unit contains sub-pixels that are shared with adjacent units, creating a modular structure that reduces the overall density requirement while maintaining visual resolution through perceptual aliasing.
Solution Approach 2:
The patent introduces a temporal dimension to the pixel structure by implementing shared sub-pixels that serve multiple spatial positions. The same physical sub-pixel is activated at different times for different logical pixel positions, effectively adding a time dimension to resolve the spatial density conflict.
2Ease of manufacture
If conventional RGB stripe or pentile arrangement is used, then manufacturing is simplified, but resolution and production quality are limited
Solution Approach 1:
Sub-pixels are designed to serve multiple functions by being shared across adjacent repeating units. A single physical sub-pixel can function as part of multiple logical pixels at different times, maximizing the utility of each manufactured element and achieving high resolution without proportionally increasing manufacturing complexity.
Solution Approach 2:
The patent changes the activation parameters of sub-pixels dynamically. By controlling which sub-pixels are active at different time intervals and combining them through persistence of vision, the system achieves higher effective resolution without changing the physical sub-pixel density or manufacturing process.
3Measurement precision
If sub-pixel density is increased to improve resolution, then sensory resolution is improved, but device complexity and production cost increase
Solution Approach 1:
The pixel structure is made dynamic through time-multiplexed activation of shared sub-pixels. Instead of static pixel assignments, the system dynamically reconfigures which sub-pixels are active for which logical pixels, allowing the same physical structure to achieve multiple resolution states through temporal variation.
Data Source
AI summary
A pixel arrangement structure and a display device are provided. The pixel arrangement structure includes a plurality of repeating units. The repeating units include a first sub-pixel, a second sub-pixel, a third sub-pixel, and a fourth sub-pixel. Center points of the first sub-pixel, the second sub-pixel, the third sub-pixel, and the fourth sub-pixel in a same repeating unit form a quadrilateral. Four adjacent sub-pixels in adjacent repeating units constitute a shared pixel, and the shared pixel includes at most two sub-pixels belonging to the same repeating unit.