Projection Sealant Structure for Thin Bezel LCD Moisture Control
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Solution Overview
Problem
In thin bezel liquid crystal display devices, moisture contamination and sealant deformation pose challenges due to the close proximity of the sealant and display areas, leading to potential contamination of the liquid crystal molecules and structural instability.
Innovation Solution
The implementation of a projection structure within the sealant area, where projections on the substrates extend in the direction of the sealant, creating gaps that allow for better adhesion and UV curing, while minimizing the contact area with the liquid crystal to prevent contamination and enhance structural stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the seal area and display area are placed close to each other to achieve thin bezel structure, then the display area can be made greater and peripheral area narrowed, but moisture may enter through the interface and contaminate the liquid crystal molecules
Solution Approach 1:
The sealant is divided into multiple segments by forming projections that create separation zones. These projections partition the sealant into first, second, and third sealant regions, preventing continuous moisture pathways and isolating potential contamination sources from the liquid crystal display area.
Solution Approach 2:
Projections formed on the substrates serve as intermediary structures between the sealant and the liquid crystal display area. These projections create physical barriers and intermediate zones that block moisture migration while maintaining the close proximity required for thin bezel design.
2Device complexity
If the sealant is placed close to the display area to achieve thin bezel structure, then the device can be more compact, but the deformed sealant may enter the internal structure of the display area causing structural instability
Solution Approach 1:
The sealant is segmented by projections into distinct regions with different functions. The first sealant region provides structural support away from the display area, the second region fills the gap between projections, and the third region extends toward the display area, creating a stable composition that resists deformation.
Solution Approach 2:
Different regions of the sealant are given different qualities and positions. Projections create localized structures that provide reinforcement where needed, while allowing the sealant to maintain close proximity to the display area without compromising overall structural stability.
3Reliability
If projections are formed in the sealant area to prevent moisture contamination and deformation, then reliability is improved, but the manufacturing process becomes more complex
Solution Approach 1:
The projections are formed by merging the substrate structures with the sealant application process. By forming projections on the substrates before applying the sealant, the structure creation and sealing processes are combined, reducing the need for separate projection fabrication steps.
Solution Approach 2:
Projections are formed on the substrates in advance before the sealant is applied. This preliminary action allows the projections to be integrated into the substrate manufacturing process, and the sealant is then applied to conform to the existing projection structure, simplifying the overall manufacturing sequence.
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 reduces moisture contamination and ensures sufficient sealant curing, maintaining the integrity of the liquid crystal display by increasing adhesion strength and preventing contamination, thus enhancing the structural stability and reliability of the thin bezel design.
Implementation Method 1
a sealant adhering the first substrate and the second substrate
Implementation Method 2
When the sealant is cured, gas is generated
Data Source
AI summary
According to one embodiment, a display device includes a sealant and liquid crystal sealed between a first substrate and a second substrate, and the display device includes a first projection formed either the first substrate or the second substrate and a first counterpart formed on the other substrate, wherein the sealant includes an alignment film, the first projection extends in the direction of extension of the sealant, the first projection and the first counterpart are opposed to each other, a gap is formed between the first projection and the first counterpart to locate the sealant, the first projection has a vertical dimension greater than that of the gap, and the first projection contacts the liquid crystal and overlaps an inner edge of the sealant in a plan view.