Display Device Window Panel Protective Layer UV Curing
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Solution Overview
Problem
Display devices face discoloration issues due to uncured resin permeating into light blocking layers, caused by insufficient UV exposure during the photo-curing process, leading to damage and discoloration of the light blocking layers.
Innovation Solution
A display device design featuring a window panel with a protective organic-inorganic composite layer and a light blocking layer, where the protective layer reduces UV exposure to the light blocking layer, and an adhesive layer that is UV-curable with a dual-curing mechanism to prevent uncured resin permeation, using a silicon-based polymer with a UV initiator and a transparent film for enhanced protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UV light is used to cure the adhesive layer, then the adhesive layer is cured and bonds the display panel and window panel, but uncured resin permeates into the light blocking layer causing discoloration
Solution Approach 1:
A protective layer is introduced as an intermediary between the adhesive layer and the light blocking layer. This protective layer blocks uncured resin from permeating into the light blocking layer while allowing UV light to pass through for curing the adhesive layer, thus preventing discoloration without compromising bonding
Solution Approach 2:
The window panel structure is segmented into multiple functional layers: the window substrate, the protective layer (with UV blocking function), and the light blocking layer. This segmentation allows each layer to perform its specific function independently, with the protective layer specifically designed to filter harmful UV wavelengths that cause discoloration
2Object-affected harmful factors
If the protective layer blocks UV light to prevent discoloration, then light blocking layer discoloration is reduced, but UV light exposure for curing the adhesive layer is reduced
Solution Approach 1:
The protective layer is designed with selective UV blocking properties - it blocks specific UV wavelengths that cause discoloration of the light blocking layer while allowing other UV wavelengths necessary for adhesive curing to pass through. This local quality differentiation resolves the contradiction between protection and curing effectiveness
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 effectively prevents discoloration of the light blocking layer by reducing UV damage and ensuring complete curing of the adhesive layer, maintaining the light blocking function without discoloration.
Implementation Method 1
the resin may undergo photo-curing by ultraviolet ("UV") light and/or the like
Implementation Method 2
the protective layer reduces UV exposure to the light blocking layer
Data Source
AI summary
A display device includes: a display panel configured to display an image; a window panel covering the display panel, and including a display area configured to transmit the image and a non-display area surrounding the display area; and an adhesive layer between the display panel and the window panel, wherein the window panel includes: a window substrate facing the display panel; a protective layer on a portion of a surface of the window substrate in the non-display area; and a light blocking layer on the protective layer, wherein the protective layer is an organic-inorganic composite layer.