Optical Path Control Member Resin for Uniform Barrier Formation
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Solution Overview
Problem
Existing light blocking films for display devices suffer from non-uniform mold release defects, leading to variations in the shape and height of barrier rib parts and accommodating parts, which increase resistance and reduce driving characteristics.
Innovation Solution
An optical path control member with a resin composition comprising an oligomer, monomer, and photoinitiator, where the monomer has a molecular weight of 600 g/mol or less and viscosity of 400 cPs or less, improving crosslinking density and reducing the thickness of the base part, ensuring uniformity of the barrier rib and accommodating parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the height of the base part is increased, then the light blocking performance is improved, but the resistance between the accommodating part and the electrode increases, reducing driving characteristics
Solution Approach 1:
The patent changes the chemical composition parameters of the resin material, specifically using monomers with molecular weight of 600 g/mol or less and controlling viscosity at 400 cPs or less. This enables the resin to achieve adequate light blocking performance with a reduced base part thickness, thereby maintaining low electrical resistance and good driving characteristics while still providing sufficient optical shielding.
Solution Approach 2:
The patent applies different material properties to different regions: the resin composition is specifically engineered with low molecular weight monomers and controlled viscosity to achieve optimal filling characteristics in the base part region, while the accommodating part uses light conversion material with specific particle properties. This localized optimization allows the base part to be thinner without compromising light blocking performance.
2Ease of manufacture
If the resin composition has high viscosity, then the mold release characteristics are improved, but the filling characteristics and uniformity of the base part are reduced
Solution Approach 1:
The patent precisely controls the viscosity parameter of the resin composition to be 400 cPs or less by selecting specific low molecular weight monomers. This viscosity range provides optimal balance between mold release characteristics and filling characteristics, enabling uniform base part formation while still allowing adequate release from the mold during the imprinting process.
Solution Approach 2:
The resin composition is formulated as a composite system containing oligomers, low molecular weight monomers (600 g/mol or less), photoinitiators, and additives. This composite material structure achieves both adequate mold release properties and excellent filling characteristics, resolving the contradiction between ease of manufacture and manufacturing precision.
3Strength
If the molecular weight of the monomer is high, then the resin composition has better mechanical strength, but the crosslinking density is reduced, worsening filling characteristics
Solution Approach 1:
The patent changes the molecular weight parameter of the monomer to be 600 g/mol or less, which increases the crosslinking density of the cured resin. This high crosslinking density improves filling characteristics and reduces base part thickness. The mechanical strength is maintained through the optimized composite formulation including oligomers and crosslinking agents, compensating for the lower monomer molecular weight.
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 improved resin composition facilitates charge movement, enhances driving speed, and ensures uniform shape and filling characteristics, thereby improving the overall driving characteristics of the optical path control member.
Implementation Method 1
the light conversion unit is formed by imprinting a photocurable resin, and thus, a base part, a barrier rib part, and an accommodating part may be formed in the light conversion unit
Data Source
AI summary
An optical path control member, according to one embodiment, comprises: a first substrate; a first electrode disposed on the first substrate; a second substrate disposed on the first substrate; a second electrode disposed under the second substrate; and a light conversion unit disposed between the first electrode and the second electrode, wherein the light conversion unit comprises a resin composition, the resin composition comprising an oligomer, a monomer, a photoinitiator and an additive, wherein the molecular weight of the monomer is at most 600 g/mol.