GOA Circuit Placement in Narrow Bezel Display Substrate
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Solution Overview
Problem
Conventional AMOLED display panels have a large bezel, which cannot meet the needs of users for narrow bezel displays.
Innovation Solution
A display substrate with a bezel region that includes a bonding area and bending areas, where a gate driver on array (GOA) driving circuit is disposed away from the display region, reducing the bezel width.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the GOA driving circuit is disposed adjacent to the display region, then the circuit is easier to connect and manufacture, but the bezel width increases
Solution Approach 1:
The patent moves the GOA driving circuit from a planar arrangement adjacent to the display region into the thickness dimension by folding it onto the back surface of the substrate. This dimensional transition allows the circuit to be positioned away from the front bezel area while maintaining electrical connections, effectively reducing the front bezel width without compromising manufacturing feasibility.
Solution Approach 2:
The patent introduces a bending area with reduced film layer structure that enables the GOA driving circuit to be folded or bent at an angle relative to the substrate. This dynamic structural arrangement allows the circuit to extend from the front surface to the back surface, positioning it away from the front bezel while maintaining connectivity, thus resolving the contradiction between bezel width reduction and manufacturing ease.
2Area of stationary object
If the bezel region is reduced to achieve narrow bezel, then the display area ratio increases, but the space for bonding area and circuit disposal decreases
Solution Approach 1:
By transitioning the GOA driving circuit from a two-dimensional planar layout to a three-dimensional folded structure extending onto the back surface, the patent effectively utilizes the thickness dimension to accommodate the circuit. This allows the front bezel to be minimized while the circuit finds sufficient space on the back surface, resolving the spatial conflict between display area expansion and circuit accommodation.
Solution Approach 2:
The patent employs a flexible film layer structure in the bending area that can be folded or bent to position the GOA driving circuit on the back surface. This flexible thin film approach enables the circuit to adapt to the reduced bezel space by extending into the depth dimension, maintaining both the narrow bezel appearance and adequate circuit disposal space.
3Length of stationary object
If the GOA driving circuit is folded onto the back surface, then the front bezel width is reduced, but the structural complexity and manufacturing difficulty increase
Solution Approach 1:
The patent divides the substrate structure into distinct regions: a normal film layer structure in the display region and a simplified bending area with reduced film layers. This segmentation allows the folding mechanism to be localized to specific areas while the rest of the display structure remains conventional, thereby reducing overall structural complexity compared to a completely redesigned folded structure.
Solution Approach 2:
The patent applies different film layer configurations to different regions: the bending area has a simplified structure with fewer layers specifically where folding is needed, while the display region maintains the complete film layer structure. This local differentiation optimizes the structure for its specific function in each region, reducing unnecessary complexity in the folding areas while preserving display quality.
Data Source
AI summary
This disclosure relates to a display substrate, including a display region and a bezel region located around the display region; the bezel region includes a bonding area located at a side of the display region, and the bezel region further includes a first region and a second region adjacent to the bonding area, and a third region opposite to the bonding area; at least one of the first region, the second region or the third region includes a bending area, and a gate driver on array (GOA) driving circuit is disposed at a side of the bending area away from the display region. This disclosure also relates to a display device.