UV-C Blocking Window Structure for Adhesive-Safe Displays
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Solution Overview
Problem
Existing window technologies in display devices do not effectively block Ultraviolet-C (UV-C) light, which can cause issues such as bubbles and decreased adhesion in the adhesive layer, leading to compromised display quality.
Innovation Solution
A window structure incorporating a sapphire substrate with a light control layer that includes a light absorption layer and a refractive layer, designed to absorb and refract UV-C light, thereby blocking it from reaching the adhesive layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional window structure is used, then the window provides basic protection and light transmission, but UV-C light passes through and causes bubbles and adhesion problems in the adhesive layer
Solution Approach 1:
The window is divided into multiple functional layers: a substrate layer, a light control layer (with light absorption and refraction sub-layers), and a coating layer. This segmentation allows each layer to perform its specific function - the light control layer specifically targets UV-C light while other layers provide structural support and additional protection.
Solution Approach 2:
The light control layer acts as an intermediary between the incoming UV-C light and the adhesive layer. It absorbs and refracts UV-C light before it can reach the adhesive layer, preventing the harmful effects without blocking visible light needed for display quality.
2Reliability
If the light control layer absorbs UV-C light, then adhesion problems are prevented, but the structural integrity and durability of the window may be compromised
Solution Approach 1:
The light control layer uses composite materials including benzotriazole, triazine, or benzimidazole compounds combined with metal oxides like ZnO and TiO2. These composite materials provide both UV-C absorption capabilities and maintain structural strength, while the coating layer adds further protection and durability.
3Reliability
If multiple layers are added to block UV-C light, then display quality is improved, but the device complexity increases
Solution Approach 1:
The light control layer performs multiple functions simultaneously: it absorbs UV-C light, refracts remaining UV-C light, and maintains optical transparency for visible light. The coating layer provides both protection against UV-C and enhancement of display quality, reducing the need for separate dedicated layers.
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 proposed window structure effectively blocks UV-C light, preventing issues like bubbles and adhesion problems in the adhesive layer, which enhances the display quality of the display device.
Implementation Method 1
at least one light absorption layer disposed on the substrate and, which absorbs the light having the wavelength of about 280 nm or less
Implementation Method 2
at least one refractive layer disposed on the substrate
Data Source
AI summary
Embodiments provide a window and a display device including the window. The window includes a substrate; at least one light control layer disposed on the substrate and, which controls light having a wavelength of about 280 nm or less; and a coating layer disposed on the at least one light control layer.