Reflective Layer for LCD Sealant Curing
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Solution Overview
Problem
In liquid crystal display devices, the narrowing picture frame and overlapping sealant with outer peripheral wiring cause light-blocking issues, leading to non-cured sealant areas, potential contamination of the liquid crystal layer, and decreased adhesive strength, which affects reliability and display quality.
Innovation Solution
A reflective layer is introduced between the outer peripheral wiring and the sealant, utilizing a metallic material with high reflectance to guide curing light and ensure complete sealant curing without increasing wiring width or requiring slits in the wiring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the sealant is disposed to overlap the outer peripheral wiring to achieve a narrower picture frame, then the picture frame width is reduced, but light is blocked by the wiring and the sealant cannot be cured properly
Solution Approach 1:
A reflective layer is introduced as an intermediary between the outer peripheral wiring and the sealant. This reflective layer redirects light that would otherwise be blocked by the wiring, directing it toward the sealant to enable proper curing. The reflective layer acts as a mediator that resolves the conflict between the wiring's light-blocking property and the sealant's light-curing requirement.
Solution Approach 2:
The patent changes the optical parameters of the system by introducing a layer with high reflectance properties. This parameter change (from transparent/absorptive to reflective) allows light to be redirected around the wiring obstacle, enabling the sealant to receive sufficient light for curing while maintaining the narrow picture frame design.
2Reliability
If a slit is provided in the wiring line to enable light to reach the sealant, then the sealant can be cured, but the wiring stability and potential distribution are compromised
Solution Approach 1:
The reflective layer serves as an intermediary that eliminates the need to compromise the wiring structure. Instead of creating slits in the wiring, the reflective layer redirects light around the wiring, preserving the wiring's integrity and stability while still enabling sealant curing.
Solution Approach 2:
The reflective layer can be configured as multiple segments or regions, allowing light to be redirected from different angles and positions. This segmentation enables comprehensive light distribution to the sealant areas that would otherwise be shadowed by the wiring, without requiring any physical modification to the wiring itself.
3Stability of the object's composition
If the outer peripheral wiring is formed with light-shielding material to maintain electrical stability, then electrical stability is maintained, but light cannot reach the sealant for curing
Solution Approach 1:
The reflective layer is positioned between the light source and the sealant, acting as a mediator that redirects light paths. This allows the wiring to maintain its light-shielding material composition for electrical stability, while the reflective layer compensates by redirecting light around the wiring to reach the sealant.
Solution Approach 2:
The patent converts the harmful light-blocking effect of the wiring into a beneficial configuration. By positioning the reflective layer strategically, the wiring's light-shielding property is no longer a obstacle but part of a controlled optical path design, where light is redirected around the wiring rather than being completely blocked.
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 effectively cures the sealant, prevents contamination, maintains adhesive strength, and enhances reliability by ensuring the sealant does not come into contact with the liquid crystal layer, while maintaining wiring stability and avoiding the need for additional width or structural modifications.
Implementation Method 1
A reflective layer is introduced between the outer peripheral wiring and the sealant, utilizing a metallic material with high reflectance to guide curing light
Implementation Method 2
The sealant is formed of a photosensitive resin material such as an ultraviolet-curing resin
Data Source
AI summary
According to one embodiment, a liquid crystal display device includes a first substrate including an outer peripheral wiring which is formed along an outer periphery of an active area that displays an image, and which has a first reflective surface, a second substrate including a reflective layer which is formed by a plurality of segments that are mutually spaced apart, and which has a second reflective surface opposed to the first reflective surface, a sealant formed of a photosensitive resin material, which surrounds the active area, is formed along the outer peripheral wiring, and attaches the first substrate and the second substrate, and a liquid crystal layer held in a cell gap in an inside surrounded by the sealant.