Display Panel Pixel Opening Layout to Reduce Inkjet Bridging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Inkjet printing technologies face challenges in achieving high accuracy and controlling ink droplet volume, leading to bridging issues in the formation of organic functional layers for AMOLED display panels, particularly as pixel sizes decrease.
Innovation Solution
The display panel design includes a substrate with anodes arranged in rows within elongated pixel openings that extend across the display area, allowing for increased ink droplet volume and reduced bridging risk, along with a pixel definition layer and light-emitting layers that cover the anodes, and a cathode layer positioned away from the substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the number of pixel openings is increased to improve subpixel resolution, then the display resolution is improved, but the number of ink droplets that can be sprayed in each opening decreases, increasing the risk of bridging
Solution Approach 1:
The invention segments multiple anodes within a single pixel opening, allowing multiple ink droplets to be sprayed in one opening while maintaining resolution through the segmented anode structure. This resolves the contradiction by enabling both high resolution and reduced bridging risk through internal segmentation rather than increasing the number of openings.
Solution Approach 2:
The invention merges multiple anodes into a single pixel opening, combining what would traditionally be separate pixel structures. This allows multiple ink droplets to be deposited in one opening without increasing bridging risk, while the merged structure maintains resolution through the arranged anodes within the unified opening.
2Manufacturing precision
If inkjet printing accuracy is improved by optimizing droplet size and position, then printing precision is improved, but the complexity of the printing process increases
Solution Approach 1:
The invention uses partial action by spraying multiple droplets in a single opening rather than requiring perfect single-droplet placement. This approach reduces the need for extreme printing accuracy while maintaining quality through the distributed droplet pattern within each opening.
3Reliability
If the number of ink droplets per opening is increased to maintain resolution with fewer openings, then bridging risk is reduced, but the complexity of controlling droplet placement increases
Solution Approach 1:
The segmented anode structure within each opening provides a natural framework for multiple droplets, simplifying control by aligning droplet placement with the pre-defined anode segments rather than requiring complex coordinate-based placement for each droplet.
Data Source
AI summary
A display panel is provided. The display panel includes a substrate, and a plurality of anodes, a pixel definition layer, a light-emitting layer, and a cathode layer that are laminated on the substrate. By collecting the anodes spaced apart from each other in a first direction in a same first pixel opening, number of the first pixel openings in the display area can be reduced, and number of ink droplets that can be sprayed within a single first pixel opening can be increased, so that a risk of bridging between adjacent ones of pixel openings can be lowered.