Display Panel Laminate UV Curing via Hollow Support Layers
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Solution Overview
Problem
Conventional display panel manufacturing methods result in uneven attachment of liquid crystal display panels to glass cover plates due to incomplete curing of the sealant layer by ultraviolet light, leading to issues like wrinkles and uneven surfaces.
Innovation Solution
A display panel laminate structure is introduced, featuring a liquid crystal panel, a first support layer with a hollow portion, a cover plate, a second support layer with another hollow portion, and a sealant layer. The refractive index of the media in the hollow portions is less than that of the sealant layer, allowing for total reflection of UV light and deeper penetration, ensuring complete curing of the sealant layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sealant layer is used to bond the liquid crystal display panel and glass cover plate, then attachment is achieved, but UV light cannot completely cure the sealant layer due to limited penetration depth, resulting in uneven attachment and wrinkles
Solution Approach 1:
The support layers are divided into multiple regions: light-transmitting regions (allowing UV penetration) and light-shielding regions (containing ink patterns). This segmentation allows different portions of the sealant layer to be cured through different mechanisms, ensuring complete and uniform curing throughout.
Solution Approach 2:
Different regions of the support layers have different optical properties - some regions transmit UV light while others shield it. This local differentiation in quality enables precise control over where and how the sealant layer is cured, achieving both complete penetration and uniform attachment.
2Strength
If the glass cover plate is made thick or heavy, then structural strength is improved, but a wider sealant layer is required, resulting in larger uncured areas and uneven attachment
Solution Approach 1:
The support layers are segmented into light-transmitting and light-shielding regions, allowing UV light to penetrate through specific pathways to cure the sealant layer completely, even when the cover plate is thick and requires a wider sealant layer for adequate bonding.
Solution Approach 2:
The solution moves from relying solely on vertical UV penetration to utilizing lateral UV transmission through the support layers. By making the support layers transparent to UV light in certain regions, curing occurs through lateral pathways, enabling complete cure of thick sealant layers that would otherwise remain uncured.
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
This approach ensures even and flat attachment of the liquid crystal panel to the cover plate, improving production yields by ensuring the entire sealant layer is cured, thus preventing wrinkles and uneven surfaces.
Implementation Method 1
The refractive index of the first medium and a refractive index of the second medium are both less than a refractive index of the sealant layer
Implementation Method 2
A refractive index of the first medium and a refractive index of the second medium are both less than a refractive index of the sealant layer
Implementation Method 3
ultraviolet light cannot penetrate the ink region to cure the entire sealant layer
Data Source
AI summary
The present invention provides a display panel laminate structure and its manufacturing method. The display panel laminate structure includes a liquid crystal panel, a first support layer, a cover plate, a second support layer, and a sealant layer. The first support layer includes a first hollow portion, and a first medium is positioned in the first hollow portion. The second support layer includes a second hollow portion, and a second medium is positioned in the second hollow portion. A refractive index of the first medium and a refractive index of the second medium are both smaller than a refractive index of the sealant layer.