OLED Pixel Structure Alternating Sub-Pixel Arrangement
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Solution Overview
Problem
Current OLED display manufacturing processes, particularly those using FMM for top-emitting AMOLED panels, face limitations in achieving high resolution and aperture ratios due to restrictions in opening size and deposition precision, which affect display brightness and lifespan.
Innovation Solution
A novel pixel structure comprising first, second, and third sub-pixels arranged in alternating configurations along axes, with third sub-pixels forming groups connected by direct lines to enhance display resolution and aperture ratios, and a method for displaying this structure that simplifies back panel wiring and manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If FMM is used in deposition process for forming organic light-emitting layer, then manufacturing process is established, but opening size restriction limits display resolution and aperture ratio
Solution Approach 1:
The pixel structure is divided into multiple sub-pixels (first, second, and third sub-pixels) with different configurations. Each sub-pixel type contributes differently to the overall display, allowing the system to achieve high resolution without requiring uniformly small openings across all pixels. The third sub-pixels are further grouped into groups that share common electrodes, segmenting the control structure.
Solution Approach 2:
The patent introduces a multi-dimensional sub-pixel arrangement where sub-pixels are organized along multiple axes (first axis and second axis) rather than a simple grid. This dimensional reorganization allows for higher effective resolution by utilizing spatial relationships in multiple directions, overcoming the limitation of minimum opening size in conventional two-dimensional arrangements.
2Manufacturing precision
If distance between sub-pixels for same color is restricted by deposition precision, then deposition process is controllable, but distance between sub-pixels for different colors becomes uneven
Solution Approach 1:
Different sub-pixel types (first, second, third sub-pixels) are assigned different roles and positions within the pixel structure. The third sub-pixels are grouped and positioned specifically to address color uniformity issues, while first and second sub-pixels handle other display functions. This local differentiation allows each sub-pixel type to be optimized for its specific function rather than requiring uniform spacing for all sub-pixels.
Solution Approach 2:
The patent employs dynamic control through independently addressable electrodes for different sub-pixel groups. By dynamically adjusting the activation and combination of different sub-pixel types based on display requirements, the system can compensate for fixed manufacturing variations in sub-pixel distances, maintaining visual uniformity through adaptive rendering.
3Illumination intensity
If aperture ratio is increased to improve display brightness, then display brightness improves, but manufacturing complexity increases due to wiring requirements
Solution Approach 1:
Multiple third sub-pixels are grouped together and share common addressable electrodes. This merging of control functions reduces the total number of independent wiring connections required on the back panel. By combining several sub-pixels under a single electrode control, the patent reduces wiring complexity while maintaining the ability to control these sub-pixels collectively for enhanced display brightness.
Solution Approach 2:
The shared addressable electrodes serve multiple third sub-pixels simultaneously, making these electrodes multi-functional. A single electrode performs the control function for multiple sub-pixels rather than requiring separate dedicated electrodes for each sub-pixel. This universal control approach simplifies the back panel wiring structure while maintaining control over the increased aperture area.
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 pixel structure achieves higher display resolution, improved aperture ratios, and extended product lifespan while reducing manufacturing complexity and power consumption by optimizing sub-pixel arrangements and sharing within the display apparatus.
Implementation Method 1
a first light-emitting layer including a first host material and a first dopant material, the first light-emitting layer emitting a first light, a second light-emitting layer including a second host material and a second dopant material, the second light-emitting layer emitting a second light
Data Source
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AI summary
A pixel structure, comprising first sub-pixels (10), second sub-pixels (20), and third sub-pixels (30), wherein: two adjacent third sub-pixels (30) facing each other form a third sub-pixel group (31), the second sub-pixels (20) are arranged along a direction of a first axis to form second-sub-pixel rows., and the second sub-pixels (20) are arranged along a direction of a second axis to form second-sub-pixel columns, the first sub-pixels (10) and the third sub-pixel groups (31) are arranged in an alternating configuration along the direction of the column axis, the second-sub-pixel columns and columns formed by the first sub-pixels (10) and the third sub-pixel groups(31) are arranged in an alternating configuration; geometric center of each second sub-pixel (20) is positioned on a perpendicular bisector of a line connecting centers of any two of adjacent third sub-pixel groups (31) and first sub-pixels (10).