Electroluminescence Display Dummy Organic Light Emission Layers
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Solution Overview
Problem
The existing methods for fabricating electro luminescence display devices often result in printing errors and poor picture quality due to variations in the depth of gaps between pattern lines, leading to bad patterns in sub-pixel areas, especially at the edge parts of the display area.
Innovation Solution
The solution involves forming a resin plate with display concavo-convex patterns for the display area and dummy concavo-convex patterns for the non-display area, ensuring uniform depth gaps between pattern lines, and using a fabricating apparatus with a supply roller and print roller to spread and print organic material uniformly across the substrate, including dummy organic light emission layers to maintain consistent printing quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional printing methods are used to form organic light emission layers, then the fabrication process is simple, but printing errors occur and picture quality deteriorates due to non-uniform gap depths between pattern lines
Solution Approach 1:
The resin plate is segmented into multiple functional regions: a display area with first and second pattern lines for active pixels, and a non-display area with dummy pattern lines for compensation. This segmentation allows different regions to serve different purposes - the display area for image formation and the non-display area for maintaining uniform printing conditions across the entire substrate, thereby resolving the contradiction between printing precision and structural complexity.
Solution Approach 2:
Dummy pattern lines are pre-formed in the non-display area of the resin plate before the actual printing process. These dummy patterns perform preliminary compensation for edge effects and ensure that when organic material is printed, the gap depths remain uniform across the entire substrate including edge regions, thus improving manufacturing precision without significantly increasing operational complexity.
2Manufacturing precision
If dummy organic light emission layers are added to non-display areas, then printing uniformity is improved, but the device structure becomes more complex
Solution Approach 1:
Dummy organic light emission layers are formed only in the non-display area of the substrate, not across the entire device. This localized approach allows the dummy layers to compensate for printing non-uniformity at the edges without affecting the display area or significantly increasing overall device complexity. The local quality principle enables precision improvement where needed while minimizing added complexity.
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
This approach ensures uniform brightness and picture quality across the entire display area by preventing printing errors and maintaining consistent gap depths, thereby improving the overall performance of the electro luminescence display device.
Implementation Method 1
a supply roller and a print roller to spread and print the organic material uniformly
Implementation Method 2
spread and print organic material uniformly across the substrate
Implementation Method 3
print the organic material spread on the resin plate to the substrate by rotating the roller
Data Source
AI summary
An electro luminescence display device having a display area and a non-display area includes a plurality of display organic light emission layers formed in the display area and a dummy organic light emission layer formed in the non-display area.