Optical Patterns for UV Curing in Display Devices
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Solution Overview
Problem
Existing display devices face challenges in improving the curing property of adhesives beneath light blocking layers, which affects the adhesion between the window and display panels, particularly due to insufficient ultraviolet light penetration.
Innovation Solution
Incorporating optical patterns on the substrate's edge region, which can scatter and redirect ultraviolet light to enhance its penetration through the light blocking layer and into the adhesive area, thereby improving the curing and adhesion properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a light-blocking layer is provided in the window part to block visible light, then light leakage is prevented, but ultraviolet light penetration into the adhesive part is reduced
Solution Approach 1:
The window part is divided into a visible light blocking layer and an ultraviolet light transmission layer, allowing each layer to perform its specific function independently. The visible light blocking layer prevents light leakage while the ultraviolet light transmission layer allows UV light to pass through to the adhesive part for curing.
Solution Approach 2:
Different regions of the window part are assigned different optical properties. The edge region near the adhesive part is designed to transmit ultraviolet light while the display area blocks visible light, creating local quality differences that resolve the contradiction between light blocking and UV penetration.
2Strength
If the adhesive part is positioned below the light-blocking layer, then adhesion between window and display panel is achieved, but curing of the adhesive is insufficient due to blocked ultraviolet light
Solution Approach 1:
An ultraviolet light transmission layer is introduced as an intermediary between the light-blocking layer and the adhesive part. This intermediary layer allows ultraviolet light to pass through to the adhesive for curing while maintaining the light-blocking function above it, enabling both adhesion and proper curing.
Solution Approach 2:
The solution adds a new dimensional layer (the ultraviolet transmission layer) between existing components rather than modifying the existing light-blocking layer. This dimensional addition allows UV light to penetrate vertically through the structure to reach the adhesive without compromising the horizontal light-blocking function.
3Manufacturing precision
If ultraviolet light is blocked to prevent curing in non-adhesive areas, then unwanted curing is prevented, but adhesive curing in required areas is also inhibited
Solution Approach 1:
The window part structure creates different optical properties in different locations. The edge region near the adhesive part allows UV light transmission for curing, while other areas maintain light blocking, achieving spatially selective optical properties that enable precise curing control.
Solution Approach 2:
The window part is segmented into functional zones: a visible light blocking region for preventing light leakage and an ultraviolet light transmission region for enabling adhesive curing. This segmentation allows independent optimization of each zone's optical properties without interfering with the other.
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 increased ultraviolet light incidence into the adhesive area leads to better curing and enhanced adhesion between the window and display panels, improving the overall performance and reliability of the display device.
Implementation Method 1
Incorporating optical patterns on the substrate's edge region, which can scatter and redirect ultraviolet light to enhance its penetration through the light blocking layer and into the adhesive area
Implementation Method 2
The increased ultraviolet light incidence into the adhesive area leads to better curing and enhanced adhesion between the window and display panels
Data Source
AI summary
A display device include a display panel with first and second substrates facing each other, a window part provided on the display panel and including a light-blocking region provided at an edge region thereof, an adhesive part provided between the display panel and the window part, and a plurality of optical patterns provided on an edge region of a bottom surface of the first substrate.