Anti-UV Sealing Layer for OLED Display Reliability
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Solution Overview
Problem
Existing OLED displays on silicon face challenges in achieving high pixel densities and reliable colorization due to difficulties in vapor-deposition processes and poor bonding between the color filter layer and encapsulating layer, especially with low-temperature curing processes that affect the reliability of the OLED display.
Innovation Solution
An electroluminescent display panel is designed with a silicon backplate, a light emitting device, a first sealing layer comprising anti-ultraviolet light material to prevent damage from ultraviolet light, an adhesive layer for improved bonding, and a color filter layer, where the anti-ultraviolet light material can convert or filter out ultraviolet light to protect the luminescent material, and a second sealing layer with inorganic encapsulating material for additional protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If ultraviolet light is used for curing the adhesive layer, then the adhesive bonding is improved, but the luminescent material is damaged by ultraviolet light irradiation
Solution Approach 1:
The patent introduces an anti-ultraviolet light material layer positioned between the ultraviolet light source and the luminescent material. This intermediary layer absorbs or blocks the harmful ultraviolet light while allowing the curing process to proceed, thus protecting the luminescent material from damage during adhesive curing.
Solution Approach 2:
The anti-ultraviolet light material converts the harmful ultraviolet light into beneficial effects by either absorbing it to prevent damage or converting it to visible light that can pass through without harming the luminescent material, thereby transforming a harmful factor into a protective mechanism.
2Illumination intensity
If white OLEDs and color filter layer are used to achieve colorization, then the display color performance is improved, but the manufacturing complexity increases
Solution Approach 1:
The patent combines the color filter layer with the anti-ultraviolet light material layer into a single integrated structure. This merging reduces the number of separate manufacturing steps and simplifies the overall device structure while maintaining both the colorization function and the ultraviolet protection capability.
Solution Approach 2:
The anti-ultraviolet light material layer is designed to serve multiple functions: it protects the luminescent material from ultraviolet damage, enables adhesive curing, and works in conjunction with the color filter layer to achieve colorization. This multi-functionality reduces the need for additional separate components.
3Temperature
If low-temperature curing process is used for adhesive layer, then the manufacturing temperature is reduced, but the bonding reliability deteriorates
Solution Approach 1:
The patent selects adhesive materials and curing conditions with specific parameter characteristics that enable effective bonding at lower temperatures. By optimizing the adhesive formulation and curing parameters, the process achieves reliable bonding without requiring high temperatures that would complicate the manufacturing process.
Solution Approach 2:
The use of composite adhesive materials with enhanced properties allows the adhesive layer to achieve strong bonding at lower curing temperatures. The composite formulation provides both the necessary adhesion strength and the temperature resistance required for reliable bonding in a low-temperature 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 enhances the reliability of the OLED display by preventing damage from ultraviolet light during curing and improving adhesion between layers, thereby maintaining the integrity and performance of the display panel.
Implementation Method 1
the anti-ultraviolet light material comprises an ultraviolet light converting material for converting the ultraviolet light into visible light
Implementation Method 2
the anti-ultraviolet light material comprises an ultraviolet light filtering material for causing the ultraviolet light to be cut off and allowing visible light to pass through
Data Source
AI summary
An electroluminescent display panel, a method for manufacturing the same and a display apparatus are disclosed. The electroluminescent display panel includes: a silicon backplate; a light emitting device on the silicon backplate; a first sealing layer on a side of the light emitting device away from the silicon backplate; an adhesive layer on a side of the first sealing layer away from the light emitting device; and a color filter layer on a side of the adhesive layer away from the first sealing layer. The light emitting device includes a luminescent material, and the first sealing layer includes an anti-ultraviolet light material for preventing ultraviolet light from irradiating onto the luminescent material.