Display Panel Black Matrix for Narrow Bezel Signal Routing
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Solution Overview
Problem
Conventional display apparatuses face challenges in achieving a narrow bezel design due to the need for separate areas for gate and data drivers, which also affect the transmission characteristics of gate signals and increase manufacturing costs.
Innovation Solution
The display apparatus incorporates a display panel with a black matrix in the non-pixel areas, featuring first and second black matrices that do not overlap with connection lines, allowing for a stepped shape configuration of gate and data lines, thereby reducing the bezel width and improving signal transmission while simplifying the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If separate areas for gate driver and data driver are provided, then the drivers can be properly disposed, but the bezel width increases
Solution Approach 1:
The gate driver and data driver are merged into a single non-pixel area, eliminating the need for separate disposal spaces. The drivers share common routing infrastructure and are positioned adjacently within the same bezel region, reducing the overall width required for driver accommodation.
Solution Approach 2:
The non-pixel area is designed to serve multiple functions simultaneously: housing both the gate driver and data driver, providing routing paths for multiple signal types, and maintaining structural integrity. This multi-functional design reduces the total area required compared to dedicated separate zones.
2Ease of manufacture
If conventional black matrix formation is used, then the manufacturing process is simple, but the gate signal transmission characteristic deteriorates
Solution Approach 1:
The black matrix is selectively positioned only in regions where it does not interfere with gate signal transmission paths. By applying the black matrix locally rather than uniformly across all non-pixel areas, the manufacturing process remains simple while the gate signal transmission characteristic is preserved in critical regions.
3Manufacturing precision
If additional mask process is added for connection line patterning, then the connection lines can be precisely formed, but the manufacturing cost increases
Solution Approach 1:
The connection line patterning is merged with the black matrix formation process. The same mask and deposition steps used to create the black matrix are also used to define the connection lines, eliminating the need for a separate mask process and reducing manufacturing costs while maintaining precision.
Solution Approach 2:
The black matrix formation process is designed to serve dual purposes: creating the optical shielding structure and simultaneously defining the connection line patterns. This multi-functional approach consolidates manufacturing steps and reduces overall process complexity and cost.
Data Source
AI summary
A display apparatus includes a display panel on which first and second gate lines extending in a third direction between a first direction and a second direction crossing the first direction, data lines extending in the second direction, connection lines extending in a fourth direction crossing the third direction to be connected to the second gate lines, and pixels including pixel areas are disposed and a black matrix disposed in a non-pixel area surrounding each of the pixel areas. The black matrix includes a first black matrix not overlapped with the connection lines and second black matrices overlapped with the connection lines.