Optical Path Control Member Nonionic Dispersant Driving Speed
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Solution Overview
Problem
The existing optical path control members face reduced driving characteristics due to dispersant interference with light conversion particles, leading to aggregation and decreased movement speed, which affects their performance in controlling light transmission angles.
Innovation Solution
Incorporating a nonionic dispersant in the light conversion material and modifying the barrier rib and base parts with high electronegativity monomers to enhance the polarity and facilitate the movement of light conversion particles, thereby improving driving speed and characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dispersant is added to the light conversion material to inhibit aggregation of light conversion particles, then the lifespan of the optical path control member is increased, but the dispersant interferes with the movement of light conversion particles, reducing driving characteristics
Solution Approach 1:
The patent introduces a specific dispersant as an intermediary substance that mediates between the light conversion particles and the dispersion liquid. This dispersant prevents particle aggregation (improving reliability) while maintaining particle mobility (preserving driving characteristics) through its unique molecular structure and interaction mechanisms.
Solution Approach 2:
The patent optimizes parameters of the dispersant including its molecular weight, hydrophilic-lipophilic balance (HLB) value, and concentration in the dispersion liquid. By carefully controlling these parameters, the dispersant achieves the dual function of preventing aggregation while allowing particle movement under applied electric fields.
2Stability of the object's composition
If the dispersant prevents aggregation of light conversion particles, then the stability of the dispersion is improved, but the movement speed of light conversion particles is reduced
Solution Approach 1:
The dispersant creates different local environments around light conversion particles - a protective layer that prevents aggregation while allowing external electric fields to penetrate and drive particle movement. The local properties of the dispersant layer are optimized to provide both stability and mobility.
Solution Approach 2:
The light conversion material forms a composite system consisting of light conversion particles, dispersant, and dispersion liquid. This composite structure combines the stabilizing effect of the dispersant with the mobility enabled by the liquid medium, achieving both dispersion stability and particle movement capability.
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 driving speed and driving characteristics of the optical path control member by preventing particle aggregation and improving the movement of light conversion particles, resulting in improved light transmittance and operational efficiency.
Implementation Method 1
a light conversion material including a dispersion liquid, light conversion particles, and a dispersant is disposed in the accommodating part
Implementation Method 2
the dispersant includes a nonionic dispersing agent
Implementation Method 3
by dispersing and aggregating the particles... when a voltage is applied
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 second substrate disposed on the first substrate; a second electrode disposed below the second substrate; and a light conversion unit disposed between the first electrode and the second electrode, wherein: the light conversion unit includes a partition wall portion, an accommodation portion, and a base portion; a light converting material including a dispersion liquid, light converting particles, and a dispersing agent is arranged in the accommodation portion; and the dispersing agent includes a nonionic dispersing agent.