Liquid Crystal Light Control Device Back-Side Injection Port Design
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Solution Overview
Problem
The existing liquid crystal light control devices face challenges in preventing liquid crystal leakage into terminal holes during the injection process, especially when multiple layers are used, leading to manufacturing errors and increased complexity due to the high difficulty and cost of punching processes for glass substrates.
Innovation Solution
The liquid crystal light control device features injection ports on the back face side opposite to the terminal holes, allowing liquid crystal to be injected between layers, and using interlayer injection ports to ensure accurate filling without leakage, with the injection marks and ports being blocked by a single plug for sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the injection port is formed on the same face side as the terminal hole to reduce the number of punching processes, then the manufacturing complexity is reduced, but liquid crystal is likely to leak out into the terminal hole
Solution Approach 1:
The patent introduces a distance parameter (L) in the planar direction between the injection port and terminal hole as a new dimensional constraint. By specifying that L ≥ 0.5 mm, the invention transforms the problem from a vertical stacking issue (same face side) to a horizontal separation issue (distance control on the same face), thereby preventing liquid crystal leakage while maintaining manufacturing simplicity.
2Adaptability or versatility
If multiple liquid crystal layers are used to achieve two-layered structure, then the light control performance is improved, but the number of terminal holes and injection ports increases leading to more leakage risk
Solution Approach 1:
The patent divides the liquid crystal panel into multiple layers (first liquid crystal layer and second liquid crystal layer) with separate terminal holes and injection ports for each layer. By segmenting the injection process and spatial arrangement, each layer's injection port is positioned at least 0.5 mm away from its corresponding terminal hole, preventing cross-layer leakage while maintaining the performance benefits of multiple layers.
3Productivity
If the injection port is positioned close to the terminal hole to accommodate larger liquid crystal drop, then the injection efficiency is improved, but liquid crystal leakage into terminal hole occurs
Solution Approach 1:
The patent changes the critical parameter from distance (positioning) to area (injection port size). By specifying that the injection port has a circular shape with a diameter of 0.1 mm to 0.3 mm, the invention allows sufficient liquid crystal volume to be injected through a small, controlled opening, maintaining injection efficiency while preventing leakage through the terminal hole due to the small port size and adequate spacing (L ≥ 0.5 mm).
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 configuration prevents liquid crystal leakage, simplifies the manufacturing process, reduces the number of glass substrates requiring punching, and enhances the productivity and light control performance of the device by allowing for a two-layered structure with guest-host type liquid crystals.
Implementation Method 1
a liquid crystal light control device capable of being used as, for example, a Neutral Density (ND) filter or the like
Data Source
AI summary
Liquid crystal is prevented from leaking out into a terminal hole in a liquid crystal injection process, and the productivity of a liquid crystal light control device is improved. A liquid crystal light control device according to the present technology includes a plurality of liquid crystal layers, terminals provided for respective electrodes disposed to face each other across the liquid crystal layers, and terminal holes formed above the terminals, and an injection mark of a liquid crystal for the liquid crystal layer is formed on a back face side which is a face on a side opposite to a face that has been opened by the terminal hole.