Display Encapsulation With Nitrogen Heterocycle Light Absorber
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Organic electroluminescence displays are vulnerable to degradation from ultraviolet rays and certain visible light, necessitating a solution to enhance the reliability of light-emitting devices by blocking these harmful rays.
Innovation Solution
Incorporating a light absorber with a hexagonal heterocycle containing nitrogen atoms and specific substituents into the encapsulation member, which includes alternating organic and inorganic films to absorb ultraviolet and visible light, thereby protecting the light-emitting device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a light absorber is added to the encapsulation member to block ultraviolet and visible rays, then the reliability of the light-emitting device is improved, but the device complexity increases
Solution Approach 1:
The light absorber is integrated into the encapsulation member by incorporating it into the organic film material. This merging approach combines the protective encapsulation function with the light absorption function in a single component, thereby improving device reliability against UV and visible ray degradation without significantly increasing overall device complexity
Solution Approach 2:
The encapsulation member uses a composite structure consisting of alternating organic and inorganic films, where the organic film contains the light absorber. This composite material approach allows the encapsulation layer to simultaneously provide mechanical protection, barrier properties, and selective light absorption, resolving the contradiction between reliability improvement and complexity increase
2Object-affected harmful factors
If the encapsulation member uses alternating organic and inorganic films to absorb light, then the absorption of harmful rays is improved, but the manufacturing complexity increases
Solution Approach 1:
The encapsulation member is segmented into multiple alternating layers of organic and inorganic films. This segmentation allows each layer to perform specific functions - the organic films containing light absorbers for UV and visible ray absorption, while the inorganic films provide barrier properties. The segmented structure enables targeted protection against harmful rays while maintaining manufacturability through established multi-layer deposition techniques
Solution Approach 2:
The light absorber is specifically incorporated into the organic film layers rather than being uniformly distributed throughout the entire encapsulation structure. This local quality approach places the light-absorbing material only where it is needed for maximum effectiveness, while the inorganic layers maintain their barrier functions, thereby improving harmful ray absorption without proportionally increasing manufacturing 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
The solution effectively absorbs external light, particularly in the ultraviolet region, preventing device deterioration and enhancing the reliability of the display apparatus.
Implementation Method 1
an encapsulation member which is disposed on the light-emitting device and includes a light absorber... efficiently absorbs a portion of visible rays and ultraviolet rays
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
A display apparatus according to an embodiment includes light-emitting devices and an encapsulation member, wherein the encapsulation member includes a light absorber including a hexagonal heterocycle containing two or more nitrogen atoms as a ring-forming atom and first to third substituents which are substituted at the hexagonal heterocycle, the first to third substituents being different from one another, and thus can effectively block external light, thereby exhibiting improved reliability.