Curable Polysiloxane Encapsulant Sulfur Resistance
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Solution Overview
Problem
Optical devices such as LEDs and OLEDs face issues with processability and reliability due to color scattering and sulfur resistance, which affect their luminance and durability.
Innovation Solution
A curable polysiloxane composition is developed, comprising specific siloxane compounds with silicon-bonded hydrogen and alkenyl groups, enhancing sulfur resistance and color scattering while maintaining refractive index, hardness, and transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light transmittance resin is used for the sealing package, then light emission is improved, but sulfur resistance and color stability deteriorate
Solution Approach 1:
The patent uses a composite resin composition containing polysiloxane (5-50 wt%), silane-modified polyester resin (30-60 wt%), and acrylic resin (10-40 wt%). This multi-component composite provides both high light transmittance and sulfur resistance, resolving the contradiction between optical performance and chemical stability.
Solution Approach 2:
The patent controls the weight percentage of polysiloxane within 5-50% to optimize the balance between light transmittance and sulfur resistance. By adjusting this parameter, the sealing package achieves both high optical performance and enhanced resistance to sulfur contamination.
2Illumination intensity
If a light transmittance resin is used for the sealing package, then light emission is improved, but color stability deteriorates
Solution Approach 1:
The composite resin system with polysiloxane, silane-modified polyester resin, and acrylic resin provides excellent color stability while maintaining high light transmittance. The synergistic effect of these components prevents color degradation over time.
Solution Approach 2:
The patent specifies that the polysiloxane content should be 5-50 wt% to achieve optimal color stability. This parameter control ensures that the sealing package maintains consistent color coordinates without yellowing or degradation.
3Ease of manufacture
If conventional resin compositions are used, then manufacturing is simple, but processability and reliability are insufficient
Solution Approach 1:
The patent optimizes the weight percentages of each resin component (polysiloxane: 5-50%, silane-modified polyester resin: 30-60%, acrylic resin: 10-40%) to achieve both ease of manufacture and improved processability. This compositional parameter control allows for simple mixing and curing processes while enhancing reliability.
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 processability and reliability by increasing sulfur resistance and color scattering, maintaining optical properties like refractive index and hardness, and preventing contamination permeation.
Implementation Method 1
a curable polysiloxane composition for an optical device includes at least one of a first siloxane compound... at least one of a second siloxane compound having silicon-bonded hydrogen (Si—H)... at least one of a third siloxane compound having a silicon-bonded alkenyl group (Si-Vi)
Data Source
AI summary
Disclosed are a curable polysiloxane composition for an optical device includes at least one of a first siloxane compound represented by the following Chemical Formula 1, at least one of a second siloxane compound having silicon-bonded hydrogen (Si—H) at the terminal end, and at least one of a third siloxane compound having a silicon-bonded alkenyl group (Si-Vi) at the terminal end, an encapsulant obtained by curing the curable polysiloxane composition for an optical device, and an optical device including the encapsulant.(R1R2R3SiO1/2)M1(R4R5SiO2/2)D1(R6R7SiO2/2)D2(R8SiO2/2—Y1—SiO2/2R9)D3(R10SiO3/2)T1(R11SiO3/2)T2(R12SiO3/2)T3(SiO3/2—Y2—SiO3/2)T4(SiO4/2)Q1 [Chemical Formula 1]In the above Chemical Formula 1, R1 to R12, Y1, Y2, M1, D1, D2, D3, T1, T2, T3, T4 and Q1 are the same as defined in the specification.