Cover Window Dual-Layer Print Gloss Contrast
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Solution Overview
Problem
Existing display device cover windows face challenges in improving visibility of marks while maintaining low manufacturing costs, particularly in achieving high contrast between glossy and matte areas for effective light blocking and image transmission.
Innovation Solution
A cover window design featuring a base member with a first print layer having a high gloss (≥70 GU) and a second print layer with a low gloss (≤10 GU) and a matting agent content, where the second print layer exposes the first print layer in non-transmissive areas, allowing for clear visibility of marks and reduced manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single print layer is used in the non-transmissive area, then manufacturing cost is reduced, but mark visibility and contrast are insufficient
Solution Approach 1:
The print layer is segmented into two distinct layers: a first print layer with high gloss (≥70 GU) and a second print layer with low gloss (≤10 GU). This segmentation allows each layer to perform its specific function - the first layer provides mark visibility through high reflectivity, while the second layer ensures light blocking through matte finish, thereby resolving the contradiction between manufacturing simplicity and mark visibility.
Solution Approach 2:
Different regions of the print structure are assigned different gloss characteristics. The first print layer uses materials with high gloss (0-3% matting agent) for mark visibility, while the second print layer uses materials with low gloss (≥10% matting agent) for light blocking. This local differentiation of properties enables both mark visibility and effective light blocking to coexist.
2Illumination intensity
If high gloss material is used throughout, then mark visibility is improved, but light blocking performance deteriorates
Solution Approach 1:
The print structure is divided into two layers with opposite gloss characteristics. The first print layer (high gloss) is positioned to provide mark visibility, while the second print layer (low gloss) is positioned to provide light blocking. This segmentation allows each layer to optimize for its specific function without compromising the other.
Solution Approach 2:
Different gloss properties are applied locally to different layers. The first print layer uses high gloss material (0-3% matting agent) specifically where mark visibility is needed, while the second print layer uses low gloss material (≥10% matting agent) specifically where light blocking is required, eliminating the need to compromise overall performance.
3Object-affected harmful factors
If low gloss material is used throughout, then light blocking is improved, but mark visibility deteriorates
Solution Approach 1:
The dual-layer print structure segments the conflicting requirements into separate layers. The second print layer (low gloss) handles light blocking while the first print layer (high gloss) handles mark visibility, allowing both functions to be optimized simultaneously rather than forcing a compromise with a single material.
Solution Approach 2:
Different gloss characteristics are assigned to different layers based on their specific functions. The first print layer uses high gloss material (0-3% matting agent) for regions requiring mark visibility, while the second print layer uses low gloss material (≥10% matting agent) for regions requiring light blocking, achieving optimal performance for both requirements.
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 design enhances mark visibility by creating a significant gloss difference between the print layers, improving contrast and reducing manufacturing costs through optimized matting agent usage and layer structure.
Implementation Method 1
a gloss of the first print layer may be greater than a gloss of the second print layer
Implementation Method 2
The second print layer may include a material containing a matting agent
Data Source
AI summary
A display device includes a display panel including a display area including a plurality of pixels and a peripheral area disposed adjacent to the display area, and a cover window including a transmissive area corresponding to the display area and a non-transmissive area corresponding to the peripheral area. The cover window includes a base member, a first print layer formed on a first surface of the base member, and a second print layer formed on the first print layer. The second print layer includes an opening exposing the first print layer, the opening is disposed in the non-transmissive area, the first print layer and the second print layer have a same color, and a gloss of the first print layer is greater than a gloss of the second print layer.