Organic Film UV Absorbent Encapsulator for Display Durability
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Solution Overview
Problem
Display devices face damage from ultraviolet light, particularly in outdoor use, due to the transmission of UV rays which can harm organic emission layers and insulating films, leading to reduced light emission efficiency and potential color changes.
Innovation Solution
A display apparatus with an encapsulator structure comprising alternately stacked inorganic and organic films, where the organic films include ultraviolet light absorbents such as benzophenone, benzotriazole, and salicylate compounds dispersed in a matrix, effectively blocking UV light by converting it into heat, thereby reducing damage to the display elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the encapsulator uses only inorganic films, then the UV blocking capability is limited, but the manufacturing process is simpler
Solution Approach 1:
The encapsulator combines inorganic films (such as silicon oxide, silicon nitride) with organic films containing UV absorbents (such as benzophenone, benzotriazole compounds) to create a composite structure that leverages the complementary UV blocking properties of both material types, achieving superior overall UV protection
Solution Approach 2:
The encapsulator is divided into multiple alternating layers of inorganic and organic films, where each layer targets specific UV wavelength ranges, with the inorganic films providing broad-spectrum blocking and the organic films enhancing protection in specific bands through their molecular absorption characteristics
2Object-affected harmful factors
If the organic film contains UV absorbents, then UV blocking is enhanced, but the film composition becomes more complex
Solution Approach 1:
UV absorbent compounds are incorporated specifically into the organic film layers at controlled concentrations, allowing these layers to perform specialized UV absorption functions while the inorganic layers handle other protective functions, creating functionally differentiated zones within the encapsulator structure
Solution Approach 2:
The concentration and type of UV absorbent compounds in the organic films are optimized to achieve desired UV blocking characteristics at specific wavelengths, allowing tuning of the encapsulator's spectral transmission properties without fundamentally changing the overall structure
3Object-affected harmful factors
If multiple organic films with different UV absorbents are used, then the UV blocking spectrum is broadened, but the manufacturing process becomes more complex
Solution Approach 1:
Different organic films containing various UV absorbent compounds (such as benzophenone for one wavelength range, benzotriazole for another) are stacked in sequence, with each film layer targeting specific UV bands, allowing comprehensive spectral coverage through modular layering
Solution Approach 2:
The alternating inorganic-organic film structure serves multiple functions simultaneously: inorganic layers provide mechanical strength and broad UV blocking, while organic layers provide enhanced UV absorption at specific wavelengths and flexibility, making the encapsulator structure multi-functional
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 achieves high transmittance for wavelengths of 430 nm or longer while maintaining low transmittance for UV wavelengths, minimizing UV-induced damage and maintaining light emission efficiency, thus enhancing the durability and performance of display devices.
Implementation Method 1
the at least one organic film may include a matrix and an ultraviolet light absorbent dispersed in the matrix... effectively blocking UV light by converting it into heat
Data Source
AI summary
A display apparatus includes a substrate, a display arranged on the substrate and including a plurality of display elements, and an encapsulator arranged on the display and encapsulating the display. The encapsulator may include at least one inorganic film and at least one organic film, and the at least one organic film may include a matrix and an ultraviolet light absorbent dispersed in the matrix.