Light Path Control Member Sealing via Substrate Melting
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Solution Overview
Problem
The reliability of light path control members is compromised due to external impurities entering through gaps or pores in the sealing layer, and exposure of dispersion liquid during the curing process of traditional light blocking films used in display devices.
Innovation Solution
A light path control member comprising a first and second substrate with electrodes and a light conversion unit, where the sealing part is formed by melting the end regions of the substrates to connect them, eliminating the need for a separate sealing material and enhancing adhesion, thus preventing external impurities and improving sealing characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate sealing material is used to seal the light blocking film, then the sealing coverage can be improved, but the manufacturing complexity and reliability are reduced due to poor adhesion and potential detachment
Solution Approach 1:
The sealing part is merged with the substrate by using the substrate material itself to form the sealing structure through melting and connection, eliminating the need for separate sealing materials and improving adhesion reliability
Solution Approach 2:
The substrate serves multiple functions: it provides structural support and simultaneously forms the sealing part through its melted end regions, reducing the number of components and improving overall reliability
2Reliability
If a resin material sealing layer is applied to seal the light blocking film, then the sealing coverage can be improved, but pores may occur during curing allowing external impurities to enter
Solution Approach 1:
The problematic curing process and associated pore formation are eliminated by replacing the resin material sealing approach with a melting and connection process that forms a pore-free sealing structure
Solution Approach 2:
Instead of using a separate resin material that requires curing, the substrate material itself is melted and connected to form the sealing part, copying the substrate material properties to create an integrated seal
3Reliability
If the sealing layer is applied using resin material, then sealing can be achieved, but external impurities may be introduced through gaps or the dispersion may be exposed
Solution Approach 1:
The sealing function is merged with the substrate structure, eliminating the need for separate sealing material application processes and reducing manufacturing complexity
Solution Approach 2:
The substrate serves its own sealing function by forming the sealing part through melting and connection, eliminating the need for external sealing materials and simplifying the manufacturing process
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
This solution simplifies the manufacturing process, enhances the sealing properties, and improves the reliability of the light path control member by integrating the sealing part with the substrates, preventing external impurities and leakage of the dispersion liquid.
Implementation Method 1
melts the end regions of the lower and upper substrates to form a connection region
Implementation Method 2
connects the connection regions of the lower and upper substrates to each other
Data Source
AI summary
A light 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 part and an accommodation part which are alternately arranged, a sealing part is disposed on the outer surface of the light conversion unit, and the sealing part contains the same material as at least one among the first substrate and the second substrate.