Laser-Recrystallized Cell Seal Layout for Narrow-Bezel Displays
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices face challenges in reducing the area occupied by cell seals and achieving improved bonding strength between substrates, which affects the display quality and bezel size.
Innovation Solution
The use of a bonding filament with a central and peripheral portion, formed by melting and recrystallizing parts of the substrates using a femtosecond laser, to connect the substrates and reduce the cell seal area, while a frit seal is used to encapsulate the display area, enhancing bonding strength and reducing the non-display area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a simple electrode structure without protrusions is used, then manufacturing is easier, but liquid crystal alignment near the electrode edge cannot be improved, leading to display defects
Solution Approach 1:
The patent applies preliminary action by forming protrusions on the electrode surface before liquid crystal alignment. These protrusions are pre-formed structures that guide and improve liquid crystal alignment in the edge regions, ensuring proper alignment is achieved before the liquid crystal is introduced into the display device.
Solution Approach 2:
The patent applies local quality by creating protrusions only in specific edge regions of the electrode rather than uniformly across the entire surface. This localized modification targets the specific areas where liquid crystal alignment problems occur, improving alignment quality where needed without unnecessarily complicating the entire electrode structure.
2Manufacturing precision
If protrusions are added to improve liquid crystal alignment, then display quality improves, but manufacturing complexity and process difficulty increase
Solution Approach 1:
The patent merges the protrusion formation process with the existing electrode fabrication process. The protrusions are formed as an integrated part of the electrode manufacturing sequence, combining multiple functions (electrode creation and alignment feature formation) into a unified manufacturing flow, thereby reducing overall process complexity.
Solution Approach 2:
The patent creates a multi-functional electrode structure where the protrusions serve dual purposes: they act as standard electrode components for electrical function and simultaneously serve as alignment guides for liquid crystals. This universal structure eliminates the need for separate alignment features, simplifying the overall manufacturing process.
3Manufacturing precision
If conventional manufacturing processes are used, then production is simpler, but sub-pixel arrangement accuracy and overall display quality cannot be improved
Solution Approach 1:
The patent applies preliminary action by establishing precise sub-pixel arrangements and protrusion patterns during the electrode fabrication stage, before liquid crystal assembly. This pre-positioning ensures accurate sub-pixel alignment is achieved in advance, eliminating the need for complex post-assembly adjustments and maintaining manufacturing efficiency.
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 results in a display device with a narrow bezel and improved bonding strength between substrates, effectively reducing the cell seal area and maintaining excellent bonding performance.
Implementation Method 1
a positive electrode and a negative electrode which are respectively connected to a common potential line and a signal line
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Provided are a display device and a method of manufacturing a display device. The display device includes a first substrate in which a display area and a non-display area disposed outside the display area are defined; a second substrate which faces the first substrate and comprises an area recessed in a thickness direction and a contact area disposed outside the recessed area; and a cell seal which bonds the first substrate and the second substrate together, wherein the cell seal comprises a bonding filament which is disposed between the contact area and the non-display area to connect the contact area and the first substrate and a frit seal which is disposed between the recessed area and the non-display area.