Optical Path Control Structure With Permittivity-Graded Light Conversion
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Solution Overview
Problem
Existing optical path control members suffer from reduced driving characteristics and reliability due to the introduction of resin materials that can deform during manufacturing, affecting the permittivity and electrical properties.
Innovation Solution
An optical path control member with a first substrate, first and second electrodes, and a light conversion part featuring regions with different permittivities, where the base part has a higher permittivity and the partition wall part has a lower permittivity, facilitating voltage transmission and reducing interference with electric field formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a resin material is used to form the receiving part, then the light conversion material can be contained, but the resin material deforms during manufacturing and introduces additives that change light conversion material characteristics and reduce driving characteristics
Solution Approach 1:
The patent extracts the resin material from the receiving part structure and replaces it with a light blocking film. This eliminates the source of deformation and additive contamination while maintaining the containment function for the light conversion material. The light blocking film provides a stable barrier without introducing harmful additives.
Solution Approach 2:
The patent introduces a light blocking film as an intermediary layer between the electrode and the light conversion material. This intermediary structure provides the necessary containment and electrical isolation without the detrimental properties of the resin material, acting as a mediator that protects the light conversion material from contamination.
2Device complexity
If the receiving part is formed by patterning an intaglio portion on a resin material, then the structure can be formed, but the resin material deforms by heat during manufacturing reducing reliability
Solution Approach 1:
The patent removes the resin material entirely from the structure and replaces it with a light blocking film. This eliminates the heat deformation issue inherent in resin materials while maintaining the structural integrity needed for the receiving part function.
Solution Approach 2:
The patent changes the material parameter from resin (which deforms under heat) to light blocking film (which maintains dimensional stability). This parameter change resolves the contradiction between structure formation and heat-induced deformation during manufacturing.
3Ease of manufacture
If the light conversion material comes into contact with the resin material, then the receiving part can be formed, but additives from the resin material are introduced into the light conversion material changing its characteristics
Solution Approach 1:
The patent extracts the resin material from the interface with the light conversion material and replaces it with a light blocking film. This creates a clean boundary that prevents additive migration while maintaining manufacturing feasibility.
Solution Approach 2:
The light blocking film serves as an intermediary barrier between the electrode structure and the light conversion material. This mediator prevents direct contact and additive contamination while allowing the necessary electrical and optical functions to proceed.
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 design improves driving characteristics by enabling efficient voltage movement and minimizing electric field interference, thereby enhancing the reliability and process efficiency of the optical path control member.
Implementation Method 1
The particles can move by applying voltage. Accordingly, the receiving part can be switched into a light transmitting portion or a light blocking portion.
Implementation Method 2
The light conversion material includes particles and a dispersion liquid in which the particles are dispersed. The particles can move by applying voltage.
Data Source
AI summary
An optical path control member according to an embodiment includes 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 part disposed between the first electrode and the second electrode, wherein the light conversion part includes a first region on the first electrode and a second region on the first region, and a permittivity of the first region is greater than a permittivity of the second region.