Nanoparticle-Modified Resin Lens Array on Glass Base
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Solution Overview
Problem
Hybrid lens array sheets face challenges in maintaining dimensional accuracy and stability due to the significant difference in thermal expansion coefficients between the resin lens array layer and the glass base, leading to deformation and reduced performance in stereoscopic image display.
Innovation Solution
A lens array sheet with a glass base and a resin lens array layer containing nanoparticles added to the matrix resin, where the nanoparticles reduce the apparent coefficient of linear thermal expansion, allowing for a thinner glass base and improved dimensional stability without compromising performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a resin lens array layer is directly formed on a glass base without an intermediate resin planar layer, then production cost is reduced and manufacturing simplicity is improved, but dimensional accuracy and alignment precision deteriorate due to thermal expansion differences
Solution Approach 1:
The patent changes the physical parameters of the resin material by incorporating nanoparticles (such as silica, alumina, or titania particles with 0.1-10 micrometer diameter) into the resin matrix. This modification alters the coefficient of linear thermal expansion of the resin from its original high value to a reduced value that better matches the glass base, thereby reducing thermal expansion mismatch while maintaining the direct bonding structure without an intermediate planar layer.
Solution Approach 2:
The patent creates a composite resin material by combining organic resin matrix with inorganic nanoparticle fillers. This composite structure provides dual benefits: the resin matrix maintains ease of molding and bonding to glass, while the dispersed inorganic particles reduce the overall thermal expansion coefficient of the resin layer, solving the dimensional stability issue without requiring complex multi-layer structures.
2Adaptability or versatility
If the glass base thickness is reduced to decrease weight and improve optical design flexibility, then adaptability is improved, but structural strength and dimensional stability worsen due to thermal deformation
Solution Approach 1:
By modifying the resin layer's thermal expansion properties through nanoparticle incorporation, the patent reduces the differential thermal expansion between the resin and glass base. This allows thin glass bases to maintain dimensional stability during temperature variations, as the resin layer no longer exerts excessive thermal stress on the weakened thin glass structure.
3Ease of manufacture
If a hybrid resin-glass lens array sheet is used to reduce production cost compared to all-glass construction, then ease of manufacture is improved, but reliability deteriorates due to poor alignment with high-definition panels caused by film expansion and contraction
Solution Approach 1:
The patent modifies the thermal expansion parameter of the resin material by adding inorganic nanoparticles, reducing the coefficient of linear thermal expansion to better match the glass base. This parameter change eliminates the excessive expansion and contraction of the resin layer during temperature cycles, maintaining precise alignment between the lens array and high-definition display panels while preserving the cost advantages of resin molding.
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 controls expansion and contraction of the resin lens array layer, maintaining high performance and reducing the glass base thickness, thereby enhancing optical design flexibility and reliability in stereoscopic image display.
Implementation Method 1
the apparent coefficient of linear thermal expansion of the resin lens array layer is reduced by adding nanoparticles to the matrix resin of the resin lens array layer
Data Source
AI summary
A lens array sheet has a glass base and a resin lens array layer formed on the glass base, wherein the resin lens array layer includes a plurality of resin lenses and preferably includes a composite material having nanoparticles added to a matrix of the resin and the plurality of resin lenses are formed on the glass base substantially independently from each other.