Variable-Width Partition Wall for OLED Pixel Alignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices face issues with deformation of partition walls, leading to reduced luminance and display quality due to misalignment of light emitting elements and defects in common electrodes.
Innovation Solution
A display device design featuring a substrate with light emitting units and a partition wall of variable width, including pillars that protrude into emission areas, and dummy patterns to support misaligned light emitting elements, preventing deformation and maintaining luminance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the width of the partition wall is increased, then the partition wall becomes more stable and less prone to deformation, but the width of the light emitting units decreases, thus reducing luminance
Solution Approach 1:
The partition wall is divided into a plate portion and multiple pillar portions. The plate portion maintains the boundary function between emission areas, while the pillar portions provide localized structural support and protrude into emission areas to prevent deformation without significantly reducing the overall light emitting width.
Solution Approach 2:
The partition wall has variable width with different sections serving different functions. The plate portion has a width corresponding to the non-emission area, while the pillar portions have greater width and protrude into emission areas. This local variation in width provides both stability and maintains luminance.
2Illumination intensity
If the width of the partition wall is decreased, then the luminance is maintained, but the partition wall becomes easier to deform, thus reducing display quality and yield
Solution Approach 1:
The partition wall is segmented into a plate portion for boundary definition and pillar portions for structural reinforcement. This segmentation allows the partition wall to maintain a narrow overall width for high luminance while having localized thickened sections that prevent deformation.
Solution Approach 2:
The partition wall combines a plate portion and pillar portions in a composite structure. The pillar portions act as reinforcing elements within the partition wall structure, providing enhanced mechanical strength and deformation resistance without significantly increasing the overall width.
3Ease of manufacture
If light emitting elements are misaligned and not disposed on the central portion of the pixel electrode, then manufacturing complexity is reduced, but defects such as breaking or local resistance increase may occur in the common electrode
Solution Approach 1:
The pillar portions of the partition wall are positioned to protrude into emission areas and provide support to light emitting elements before misalignment can cause damage. This preemptive support structure prevents breaking and electrical defects even when alignment is not perfect.
Solution Approach 2:
The pillar portions act as intermediary support structures between the partition wall and the light emitting elements. They provide mechanical support and electrical isolation, allowing misaligned light emitting elements to be supported without causing defects in the common electrode.
Data Source
AI summary
A includes a substrate including a display area in which a plurality of emission areas configured to emit light for displaying an image are arranged; a plurality of light emitting units located on the substrate and respectively corresponds to the plurality of emission areas; and a partition wall on the substrate, corresponding to a non-emission area which is a boundary between the plurality of emission areas, and having a variable width in at least one direction. The partition wall includes a plate corresponding to the non-emission area; and a pillar protruding from at least a portion of the plate to each of the plurality of emission areas and having a greater width than the plate.