OLED Lighting Apparatus Moisture Barrier Segmentation
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Solution Overview
Problem
Organic light emitting diodes (OLEDs) are prone to moisture penetration, which degrades their reliability, and existing manufacturing methods are complex due to the need for multiple barrier layers in the emission area, increasing the thickness and complexity of the lighting apparatus.
Innovation Solution
A lighting apparatus is divided into a first area for an auxiliary line and a second area for barrier layers, with a simplified manufacturing method that includes forming inorganic and organic barrier layers only in the second area, eliminating the need for a separate mask process and reducing the thickness of the apparatus by integrating these layers without an insulating layer on the anode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple barrier layers are formed in the emission area to suppress moisture penetration, then reliability is improved, but device complexity and thickness increase
Solution Approach 1:
The device is divided into a first area for auxiliary lines and a second area for barrier layers. This segmentation allows barrier layers to be placed only where needed (second area) rather than uniformly across the entire emission area, reducing overall device complexity while maintaining moisture protection where critical.
Solution Approach 2:
Barrier layers are concentrated in the second area where moisture penetration is most critical, rather than being uniformly distributed. This local quality approach optimizes moisture protection effectiveness while minimizing the total amount of barrier material and reducing device thickness in non-critical areas.
2Reliability
If multiple barrier layers are deposited to protect against moisture, then reliability is improved, but manufacturing complexity increases
Solution Approach 1:
A photosensitive film pattern is formed in advance in the first area before depositing barrier layers. This preliminary action serves as a mask that automatically guides the deposition process, allowing barrier layers to be precisely placed in the second area without requiring complex real-time manufacturing control or multiple separate masking steps.
Solution Approach 2:
The photosensitive film pattern acts as a self-guiding mask during barrier layer deposition. The deposition process automatically conforms to the pre-formed pattern, eliminating the need for additional manual masking operations and simplifying the overall manufacturing process while ensuring precise barrier layer placement.
3Ease of manufacture
If barrier layers are formed only in the second area without mask process, then manufacturing is simplified, but manufacturing precision may be compromised
Solution Approach 1:
The photosensitive film pattern is prepared in advance with precise dimensions and positioning. This preliminary precision work ensures that when barrier layers are deposited over it, the resulting barrier layer placement accuracy is maintained without requiring complex real-time adjustment mechanisms during the deposition process.
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 solution effectively suppresses moisture penetration, improves the reliability of the OLEDs, reduces the thickness of the lighting apparatus, and simplifies the manufacturing process by eliminating the need for additional barrier layers in the emission area, enhancing flexibility and uniform luminance.
Implementation Method 1
an organic layer disposed on the first electrode and a second electrode disposed on the organic layer
Data Source
AI summary
A lighting apparatus using an organic light emitting diode that has a first area and a second area, the lighting apparatus comprises a substrate; an auxiliary line disposed in the first area on the substrate; a plurality of barrier layers disposed in the second area on the substrate; a first electrode disposed on the auxiliary line and the plurality of barrier layers; an organic layer disposed on the first electrode; and a second electrode disposed on the organic layer.