Display Encapsulation Light Absorber for UV and Visible Blocking
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Solution Overview
Problem
Organic electroluminescence displays are vulnerable to degradation from ultraviolet rays during manufacturing and from sunlight exposure during outdoor use, necessitating a technique to block UV and visible rays.
Innovation Solution
Incorporating a light absorber with a hexagonal heterocycle containing two or more nitrogen atoms and specific substituents into the encapsulation member of the display apparatus, which efficiently absorbs UV and visible rays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a light absorber is incorporated into the encapsulation member to block UV and visible rays, then the reliability and service life of the light-emitting device is improved, but the device complexity and manufacturing complexity increase
Solution Approach 1:
The encapsulation member is constructed as a composite structure comprising multiple layers including organic films and inorganic films. The light absorber is specifically incorporated into the organic film layer, creating a composite material system that combines the protective functions of the encapsulation member with the light-absorbing properties of the organic compound containing hexagonal heterocycle and condensed ring group.
Solution Approach 2:
The light absorber acts as an intermediary substance within the encapsulation member that selectively absorbs harmful UV and visible rays before they can reach and degrade the light-emitting device. The organic film containing the light absorber serves as a mediating layer between the external environment and the sensitive light-emitting components.
2Reliability
If a light absorber is incorporated into the encapsulation member to block UV and visible rays, then the reliability and service life of the light-emitting device is improved, but the manufacturing precision and production difficulty increase
Solution Approach 1:
The encapsulation member is constructed as a composite structure comprising multiple layers including organic films and inorganic films. The light absorber is specifically incorporated into the organic film layer, creating a composite material system that combines the protective functions of the encapsulation member with the light-absorbing properties of the organic compound containing hexagonal heterocycle and condensed ring group.
Solution Approach 2:
The invention specifies particular structural parameters for the light absorber molecule, including the hexagonal heterocycle core with two or more nitrogen atoms and specific substituent groups (condensed ring group with three or more rings, and substituted phenyl group with hydroxyl group). These parameter specifications ensure consistent light-absorbing performance while facilitating standardized manufacturing processes.
3Object-affected harmful factors
If the light absorber uses a specific molecular structure with hexagonal heterocycle and condensed ring group, then the light absorption efficiency is improved, but the ease of manufacture decreases
Solution Approach 1:
The invention specifies particular structural parameters for the light absorber molecule, including the hexagonal heterocycle core with two or more nitrogen atoms and specific substituent groups (condensed ring group with three or more rings, and substituted phenyl group with hydroxyl group). These parameter specifications ensure consistent light-absorbing performance while facilitating standardized manufacturing processes.
Solution Approach 2:
The light absorber molecule exhibits local quality differentiation through its distinct functional groups: the hexagonal heterocycle core provides the fundamental light-absorbing capability, the condensed ring group enhances absorption efficiency in specific wavelength regions, and the substituted phenyl group with hydroxyl group contributes to both absorption properties and solubility/processability. This localized functional differentiation optimizes overall performance while enabling targeted synthesis approaches.
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 display apparatus achieves improved reliability by effectively blocking external light, thereby preventing degradation of the light-emitting device and enhancing its service life.
Implementation Method 1
a light absorber which efficiently absorbs a portion of visible rays and ultraviolet rays
Data Source
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 ring-forming atoms, and first to third substituents 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.