Optical Path Control Member Additive Migration
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Solution Overview
Problem
The existing light blocking films used in display devices suffer from deteriorating optical characteristics and adhesion issues due to the movement of additives in photocurable resins, leading to haze and reduced transmittance over time, which affects the reliability and performance of the optical path control member.
Innovation Solution
An optical path control member is designed with a photocurable resin composition that includes an oligomer, monomer, photopolymerization initiator, and an antistatic agent in specific weight percentages (2.0 wt % to 3.0 wt %) to improve adhesion and reduce additive movement, thereby maintaining optical clarity and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additives are included in photocurable resin to improve releasability or electrical characteristics, then releasability and electrical characteristics are improved, but optical characteristics deteriorate over time due to additive movement on the resin surface
Solution Approach 1:
The patent extracts the harmful additives from the photocurable resin by providing a separate coating layer on the partition wall portion. This coating layer contains the necessary additives for releasability and electrical characteristics, while the photocurable resin remains additive-free, thus preventing optical characteristic deterioration while maintaining the required functional properties.
Solution Approach 2:
The patent introduces a coating layer as an intermediary between the photocurable resin and the external environment. This coating layer serves as a mediator that provides the necessary additives (for releasability and electrical characteristics) without allowing them to contaminate the optical path, thus resolving the contradiction between functional requirements and optical performance.
2Reliability
If additives are included in photocurable resin to improve releasability or electrical characteristics, then releasability and electrical characteristics are improved, but adhesion between resin and adhesive layer deteriorates due to additive movement
Solution Approach 1:
The patent extracts the harmful additives from the photocurable resin by providing a separate coating layer on the partition wall portion. This coating layer contains the necessary additives for releasability and electrical characteristics, while the photocurable resin remains additive-free, thus preventing optical characteristic deterioration while maintaining the required functional properties.
Solution Approach 2:
The patent introduces a coating layer as an intermediary between the photocurable resin and the external environment. This coating layer serves as a mediator that provides the necessary additives (for releasability and electrical characteristics) without allowing them to contaminate the optical path, thus resolving the contradiction between functional requirements and optical performance.
3Ease of manufacture
If partition wall portion is formed using photocurable resin with additives, then light blocking function is achieved, but film removal and delamination occur over time due to additive movement
Solution Approach 1:
The patent extracts the harmful additives from the photocurable resin by providing a separate coating layer on the partition wall portion. This coating layer contains the necessary additives for releasability and electrical characteristics, while the photocurable resin remains additive-free, thus preventing optical characteristic deterioration while maintaining the required functional properties.
Solution Approach 2:
The patent introduces a coating layer as an intermediary between the photocurable resin and the external environment. This coating layer serves as a mediator that provides the necessary additives (for releasability and electrical characteristics) without allowing them to contaminate the optical path, thus resolving the contradiction between functional requirements and optical performance.
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 enhances the adhesive properties and optical characteristics of the optical path control member, preventing film removal and delamination, and maintaining high lateral transmittance and haze levels, thus improving the overall performance and longevity of the display device.
Implementation Method 1
the photocurable resin includes an oligomer, a monomer, a photopolymerization initiator, and an additive
Implementation Method 2
the additive may include an antistatic agent in an amount of 2.0 wt % to 3.0 wt %
Data Source
AI summary
An optical path control member according to an embodiment comprises: a first substrate; a first electrode disposed on the first substrate; a light conversion part disposed on the first electrode; a second substrate disposed on the first substrate; a second electrode disposed under the second substrate; and an adhesive layer disposed between the light conversion part and the second electrode, wherein the light conversion part comprises alternately disposed partition wall portions and accommodation portions, light transmittance of the accommodation portions changes according to voltage application, the upper surfaces of the partition wall portions are in contact with the adhesive layer, the light conversion part is formed of a photocurable resin, the photocurable resin comprises an oligomer, a monomer, a photopolymerization initiator, and an additive, and the additive comprises an antistatic agent in an amount of 1.5 wt % to 3.0 wt %.