Display Panel Pad Segmentation for Signal Integrity
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Solution Overview
Problem
Existing display devices face challenges in achieving improved reliability and quality, particularly in the connection and signal transmission between the display panel and the driving chip.
Innovation Solution
The display device incorporates a display panel with a specific arrangement of pads and a driving chip with corresponding bumpers, where only certain pads are connected to a connection wire, allowing for efficient signal transmission to sub-pixel circuits while keeping other pads in a floating state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all pads are connected to connection wires, then signal transmission coverage is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The pad array is segmented into multiple pad columns (first, second, third pad columns) with different connection patterns. Only specific pads in each column are connected to connection wires, while other pads are left floating. This segmentation allows selective signal transmission without requiring all pads to be connected, thereby reducing device complexity while maintaining adequate signal transmission coverage.
Solution Approach 2:
Different pads are assigned different connection states based on their specific positions and functional requirements. Pads that require signal transmission are connected to connection wires, while pads that do not require signals are left floating. This local differentiation optimizes the connection structure by applying connections only where necessary, reducing overall device complexity while ensuring reliable signal transmission to sub-pixel circuits.
2Reliability
If multiple pads are connected to connection wires, then signal transmission capability is improved, but risk of signal interference increases
Solution Approach 1:
Pads that do not require signal transmission are extracted from the connected pad set and left in a floating state. By removing unnecessary connections, the number of active signal paths is reduced, which minimizes potential sources of signal interference while maintaining the necessary signal transmission capability to sub-pixel circuits.
Solution Approach 2:
Instead of connecting all pads and then managing interference, the approach is inverted by defaulting to a floating state and only connecting pads that specifically require signal transmission. This inversion strategy inherently reduces signal interference by minimizing the number of connected pads while ensuring adequate signal delivery to where it is needed.
3Area of stationary object
If pads are arranged in dense arrays, then area utilization is improved, but manufacturing precision requirements increase
Solution Approach 1:
The dense pad array is segmented into multiple columns with distinct connection patterns. By organizing pads into columns and selectively connecting specific pads within each column, the manufacturing process can focus on connecting only necessary pads rather than all pads. This segmentation approach maintains high area utilization while reducing the overall complexity and precision burden of pad connections.
Solution Approach 2:
Instead of connecting all pads in the dense array, only the necessary portion of pads are connected to connection wires. This partial action approach achieves adequate signal transmission capability without requiring precise connection of every pad, thereby reducing manufacturing precision requirements while maintaining efficient area utilization.
Data Source
AI summary
A display device includes a display panel including a plurality of pads, wherein the plurality of pads include a plurality of first pads, a plurality of second pads, and a plurality of third pads, wherein a first pad column, a second pad column, and a third pad column each include a first pad, a second pad, and a third pad, wherein only the first pad of the first pad column, the second pad of the second pad column, and the third pad of the third pad column are connected to a connection wire, wherein, in the first pad column, the second pad and the third pad that are not connected to the connection wire are in a floating state.