LCD Bezel Reduction via Sealant Protrusion
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Solution Overview
Problem
The existing LCD apparatuses face a limitation in reducing bezel width due to the weak adhesive force between the upper and lower substrates, which is exacerbated by the narrow width of the sealant, necessitating a trade-off between bezel width and adhesive strength.
Innovation Solution
The solution involves reducing the width of the sealant by allowing it to directly contact the substrate through specific contact areas, enhancing the adhesive force between the substrates, and using inorganic insulation layers and prevention walls to improve bonding, thereby reducing the bezel width without compromising adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the width of the sealant is reduced to decrease bezel width, then the aesthetic appearance and bezel width are improved, but the adhesive force between the upper substrate and lower substrate is weakened
Solution Approach 1:
The patent introduces a protrusion structure on the sealant that creates localized contact points with the color filter layer. This protrusion concentrates the adhesive force at specific locations rather than distributing it uniformly across the sealant width, allowing the sealant to be narrower while maintaining sufficient bonding strength at the contact points.
Solution Approach 2:
The protrusion structure is pre-formed on the sealant before the bonding process. This preliminary structural preparation ensures that when the sealant is applied, it immediately creates optimal contact geometry with the color filter layer, maximizing adhesive force from the outset and enabling reduced sealant width without compromising bond strength.
2Strength
If the width of the sealant is increased to reinforce adhesive force, then the adhesive force between substrates is improved, but the bezel width increases and aesthetic appearance deteriorates
Solution Approach 1:
Instead of increasing sealant width uniformly, the patent uses a protrusion structure that concentrates adhesive functionality at specific contact points. This allows the sealant to maintain a narrow overall width while having localized regions of enhanced adhesive interaction, resolving the contradiction between narrow bezel and strong bonding.
Solution Approach 2:
The patent changes the geometric parameters of the sealant by introducing a protrusion with specific height and width dimensions. This parameter modification creates a structure that achieves superior adhesive force per unit width, allowing the sealant to be narrower than conventional designs while maintaining or exceeding bonding strength.
3Strength
If the sealant directly contacts the substrate through contact areas, then the adhesive force is enhanced and bezel width is reduced, but the manufacturing precision requirements increase
Solution Approach 1:
The protrusion structure is pre-formed on the sealant with defined dimensions and position. This preliminary structuring creates a robust contact geometry that is tolerant to reasonable variations in alignment during manufacturing, reducing the stringency of precision requirements compared to requiring perfect flat-contact alignment.
Solution Approach 2:
By optimizing the protrusion dimensions (height, width, shape), the patent creates a contact structure that maintains adequate adhesive force even with moderate misalignment. The parameter optimization ensures that the contact area remains effective within practical manufacturing tolerances, balancing precision requirements with bonding performance.
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 approach effectively reduces the bezel width of the LCD apparatus while maintaining or improving the adhesive force between the substrates, allowing for a more aesthetically pleasing and functional display device.
Implementation Method 1
enhancing the adhesive force between the substrates
Implementation Method 2
using inorganic insulation layers and prevention walls to improve bonding
Data Source
Figure 1~2
Figure 3A~3B
Figure 3C
AI summary
Disclosed is a liquid crystal display (LCD) apparatus. The LCD apparatus includes a first substrate (100) and a second substrate (200), each including a display area and a non-display area, a sealant (300) disposed between the non-display area of the first substrate (100) and the non-display area of the second substrate (200), and a first contact area (125) and a light shielding pattern (120) that are disposed in the non-display area of the first substrate (100). The light shielding pattern (120) is disposed on one outermost side of the first substrate (100), the first contact area (125) is disposed between the light shielding pattern (120) and the display area, and the sealant (300) contacts the first substrate (100) in the first contact area (125).