Optical Member Capping Part for Wavelength Conversion Layer
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Solution Overview
Problem
Existing backlight units in LCDs face challenges in maintaining durability and reliability due to exposure to oxygen and moisture, which can degrade the wavelength conversion layer and affect light emission efficiency.
Innovation Solution
An optical member with a capping part made of organic and inorganic substances is used to cover the lateral sides of the wavelength conversion layer, preventing oxygen and moisture penetration and enhancing durability and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wavelength conversion layer is exposed to oxygen and moisture, then the manufacturing process is simple, but the durability and reliability deteriorate
Solution Approach 1:
The patent applies flexible thin film encapsulation layers (organic and inorganic) to protect the wavelength conversion layer. These thin films provide effective barrier protection against oxygen and moisture penetration while maintaining the overall simplicity and flexibility of the backlight unit structure, thus improving durability without significantly increasing structural complexity.
Solution Approach 2:
The patent uses composite encapsulation structures combining organic and inorganic materials. The organic layer provides flexibility and stress relief, while the inorganic layer provides superior barrier properties against oxygen and moisture. This composite approach achieves enhanced protection and reliability while maintaining manufacturing feasibility.
2Reliability
If a capping part is added to cover lateral sides, then protection against oxygen and moisture improves, but device complexity increases
Solution Approach 1:
The patent merges the capping part function with the existing encapsulation layers. The organic and inorganic layers are applied to cover both the top surface and lateral sides of the wavelength conversion layer, combining the protective function with the existing structural elements rather than adding separate complex components.
Solution Approach 2:
The encapsulation layers serve multiple functions simultaneously: they act as barriers against oxygen and moisture, provide mechanical protection, and maintain structural integrity. This multi-functionality reduces the need for additional separate protective components, thereby limiting the increase in device 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 capping part effectively protects the wavelength conversion layer from external chemical impacts, improving the optical member's durability and reliability, leading to enhanced light conversion efficiency and image quality in LCDs.
Implementation Method 1
The capping part can prevent oxygen and/or moisture from penetrating into the lateral sides of the wavelength conversion layer
Implementation Method 2
a quantum dot bar having a plurality of quantum dots, which can convert blue light into red light or green light, is positioned in front of a blue LED that emits the blue light. Thus, as the blue light is irradiated onto the quantum dot bar, the blue light, the red light and the green light are mixed and the mixed light is incident into the light guide plate, thereby generating white light
Data Source
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AI summary
Disclosed are an optical member, a display device including the same and a method of manufacturing the same. The optical member includes a wavelength conversion layer; and a capping part covering lateral sides of the wavelength conversion layer. The capping part includes an organic substance and an inorganic substance to improve the sealing function of the wavelength conversion layer.