Gradient Composite Film for OLED UV Blocking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional OLED encapsulation portions are ineffective in blocking ultraviolet radiation, which can significantly shorten the lifespan of the organic light emitting layer.
Innovation Solution
A composite film layer is developed with alternating inorganic and organic sub-film layers of varying thicknesses and refractive indices, which are stacked to create a gradient structure that utilizes the half wave loss phenomenon to reflect ultraviolet radiation, thereby enhancing the panel's resistance to UV radiation, water, and oxygen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional encapsulation portions are used, then water and oxygen blocking is achieved, but ultraviolet radiation blocking is insufficient
Solution Approach 1:
The patent applies composite materials by creating a multi-layer film structure combining organic and inorganic sub-film layers with different refractive indices. This composite structure enables simultaneous blocking of water, oxygen, and ultraviolet radiation, resolving the contradiction between conventional encapsulation effectiveness and UV radiation blocking capability.
Solution Approach 2:
The patent implements local quality by varying the refractive indices and thicknesses of different sub-film layers within the encapsulation structure. Specific layers are designed with particular optical properties to target UV radiation at different wavelengths, while maintaining overall encapsulation effectiveness against water and oxygen penetration.
2Duration of action of moving object
If the organic light emitting layer is exposed to ultraviolet radiation, then display functionality is maintained, but lifespan is significantly shortened
Solution Approach 1:
The patent applies preliminary anti-action by incorporating UV-blocking functional layers into the encapsulation structure before UV radiation can reach the organic light emitting layer. This preventive approach protects the OLED from UV damage throughout its operational lifespan, extending durability without affecting display functionality.
3Object-affected harmful factors
If a single-layer encapsulation structure is used, then manufacturing is simple, but blocking performance against multiple harmful factors is insufficient
Solution Approach 1:
The patent applies segmentation by dividing the encapsulation structure into multiple functional sub-layers, each designed to address specific harmful factors (water, oxygen, UV radiation). This segmented approach enables comprehensive protection against multiple threats while maintaining a systematic and manufacturable structure through defined layering sequences.
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 composite film layer effectively blocks ultraviolet radiation, improving the durability and quality of OLED display panels by protecting the organic light emitting layer from environmental damage.
Implementation Method 1
utilizes the half wave loss phenomenon to reflect ultraviolet radiation
Implementation Method 2
a refractive index of the first sub-film layers is different from a refractive index of the second sub-film layers, the first sub-film layers and the second sub-film layers are alternately stacked
Data Source
AI summary
A composite film layer, a method for manufacturing the same, and a method for manufacturing an organic light emitting diode (OLED) display panel are provided. The composite film layer includes first sub-film layers and second sub-film layers having different refractive indices, wherein the first sub-film layers and the second sub-film layers are alternately stacked, and thicknesses of the first sub-film layer and thicknesses of the second sub-film layer gradually increase or decrease in a direction perpendicular to the composite film layer.