Photosensitive Resin Composition for Reflective Displays
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Solution Overview
Problem
Current white photosensitive resin compositions for electronic paper displays suffer from poor heat-yellowing resistance, surface roughness, developability, and brightness, limiting their effectiveness in reflective display applications.
Innovation Solution
A photosensitive resin composition comprising a polysiloxane polymer, a compound with ethylenically unsaturated groups, a photoinitiator, a solvent, a pigment, and a crosslinking agent, where the pigment includes materials like titanium dioxide or white hollow polymer microspheres, enhancing heat resistance and optical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a white photosensitive resin composition is used as the shading part in reflective display, then light utilization efficiency is improved, but heat-yellowing resistance, surface roughness resistance, developability and brightness deteriorate
Solution Approach 1:
The patent uses a composite resin system combining polysiloxane polymer (A) with acrylic resin to create a white photosensitive resin composition that simultaneously achieves good heat-yellowing resistance, surface roughness resistance, developability and brightness. The composite material approach allows synergistic effects where polysiloxane provides thermal stability while acrylic resin contributes to photo-curing properties and surface quality.
Solution Approach 2:
The patent optimizes specific parameters including the molecular weight, viscosity and functional group content of the polysiloxane polymer (A), as well as the ratio of polysiloxane to acrylic resin, to achieve the desired balance of properties. By carefully controlling these parameters, the composition achieves both improved light utilization efficiency and maintained reliability.
2Loss of energy
If a white photosensitive resin composition is used as the shading part in reflective display, then light utilization efficiency is improved, but surface roughness resistance deteriorates
Solution Approach 1:
The combination of polysiloxane polymer (A) with acrylic resin creates a composite system where the acrylic component provides excellent surface finish properties while the polysiloxane ensures thermal stability. This composite approach resolves the contradiction between light utilization efficiency and surface roughness resistance.
Solution Approach 2:
The patent controls the viscosity and molecular weight parameters of the polysiloxane polymer to ensure proper flow and surface leveling during the coating and curing process, thereby achieving good surface roughness resistance while maintaining high light utilization efficiency.
3Loss of energy
If a white photosensitive resin composition is used as the shading part in reflective display, then light utilization efficiency is improved, but developability deteriorates
Solution Approach 1:
The acrylic resin component in the composite system provides excellent developability through its chemical structure that allows easy removal of unexposed resin, while the polysiloxane ensures thermal stability. This composite formulation resolves the contradiction between light utilization efficiency and developability.
Solution Approach 2:
The patent optimizes the functional group content and molecular weight parameters to ensure that the photosensitive resin composition maintains appropriate solubility and reactivity for easy development while achieving high light utilization efficiency in reflective display applications.
4Loss of energy
If a white photosensitive resin composition is used as the shading part in reflective display, then light utilization efficiency is improved, but brightness deteriorates
Solution Approach 1:
The composite resin system combines polysiloxane (A) with acrylic resin to achieve a balance where the white pigment effectively reflects light for high light utilization efficiency while the resin matrix maintains appropriate optical transparency to preserve brightness. The synergistic interaction between components resolves this contradiction.
Solution Approach 2:
The patent controls the refractive index and optical transparency parameters of the resin composition to ensure that the white shading part achieves high light utilization efficiency without compromising the overall brightness of the reflective display device.
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 composition improves heat-yellowing resistance, surface roughness, and developability while maintaining high brightness, thereby enhancing the performance of reflective display elements, particularly in electronic paper displays.
Implementation Method 1
a photoinitiator (C)
Implementation Method 2
the pigment (E) comprises at least one selected from the group consisting of titanium dioxide, calcium carbonate, calcium sulfate, zinc oxide, barium sulfate, barium carbonate, silicon dioxide, aluminum powder, kaolin, clay, talc, montmorillonite, aluminum hydroxide, magnesium carbonate, and white hollow polymer microspheres
Data Source
AI summary
The invention relates to a photosensitive resin composition; especially relates to a photosensitive resin composition that has good heat-yellowing resistance, surface roughness resistance, developability and brightness. The invention also provides a white matrix, a color filter and a reflective display element.