Narrow Bezel Display Device Sealant Bridge Shielding
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Solution Overview
Problem
The challenge is to reduce the bezel width of display devices while maintaining strong adhesiveness between substrates and preventing electro-chemical corrosion of metal wiring lines, as existing technologies face issues with adhesiveness and damage to circuit areas under the sealant, leading to bonding problems and corrosion.
Innovation Solution
The solution involves a display device design with a sealant that extends onto signal transmission lines and a GIP driver, using bridge patterns and shield patterns to enhance adhesiveness and minimize contact areas, thereby reducing bezel width and preventing corrosion without additional design or process modifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the seal area is reduced to achieve narrower bezel width, then the esthetic sense and user demand are satisfied, but the adhesiveness between upper substrate and lower substrate is lowered
Solution Approach 1:
The patent introduces a sealant as an intermediary bonding material that extends into the non-display area to bond the upper substrate and lower substrate. This sealant acts as a mediator that provides strong adhesion between the substrates while allowing the display area to be maximized and bezel width to be minimized. The sealant's bonding function compensates for the reduced seal area, maintaining reliability while achieving the desired narrow bezel design.
2Reliability
If the sealant extends onto circuit portions in the non-display area, then the bonding strength is improved, but the circuit units are easily damaged by external force and electro-chemical corrosion occurs
Solution Approach 1:
The patent segments the seal area into distinct regions: a first seal area that overlaps with the non-display area and circuit units, and a second seal area that does not overlap with circuit units. This segmentation allows the sealant to provide bonding strength in the non-display area while avoiding direct contact with vulnerable circuit portions, thereby preventing damage and corrosion. The divided seal areas enable selective bonding without compromising circuit integrity.
3Area of stationary object
If the seal area overlaps with ITO circuit regions, then bonding coverage is increased, but adhesiveness is poor and cracks are easily formed
Solution Approach 1:
The patent applies different seal area configurations to different locations: the first seal area overlaps with the non-display area to provide bonding, while the second seal area is positioned to avoid ITO circuit regions. This local differentiation ensures that the sealant bonds substrates where needed while avoiding areas with poor adhesiveness (ITO regions). By making the seal area properties location-dependent, the patent achieves both coverage and strength without forming cracks in vulnerable circuit areas.
Data Source
AI summary
A display device according to an embodiment includes a lower substrate in which a display area and a non-display area are divided and an upper substrate which corresponds to the lower substrate and includes a black matrix BM. Further, the display device can include a bezel which is located on the non-display area and includes a GIP driver, a plurality of signal transmission lines, a connection line connecting the GIP driver and the plurality of signal transmission lines, and a seal area equipped with a sealant, in a direction being apart from one side of the display area, a plurality of bridge patterns which is located on the non-display area and electrically connects the GIP driver and the connection line, and the connection line and the plurality of signal transmission lines, respectively, and a plurality of shield patterns enclosing the plurality of bridge patterns. Also, the display device can include a plurality of shield patterns which minimize an area in which the sealant and the plurality of bridge patterns are in directly contact with each other.