Panel Circuit Structure for Display Driving Element
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Solution Overview
Problem
Conventional flat display panel circuit structures face challenges in reducing the thickness and size of the driving element while avoiding short circuits between test pads and transmission pads, which affects the precision and cost-effectiveness of LCD and OLED display production.
Innovation Solution
The panel circuit structure features multiple transmission strings with pads disposed on a substrate, where test pads are placed outside the driving element's projection area, and transmission pads are adjacent to each other without intervening elements, reducing the risk of short circuits and minimizing the size and height of the driving element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If test pads are placed inside the driving element area, then the driving element can be made smaller, but the risk of short circuit between test pads and transmission pads increases
Solution Approach 1:
The patent positions test pads in the vertical dimension outside the projection area of the driving element, rather than trying to fit them horizontally within the driving element area. This spatial reconfiguration in another dimension allows both small driving element size and low short circuit risk to be achieved simultaneously.
Solution Approach 2:
The patent separates the functional areas by placing transmission pads and test pads in distinct spatial locations - transmission pads adjacent to the driving element and test pads outside its projection area. This segmentation eliminates the short circuit risk while maintaining compact overall structure.
2Reliability
If transmission pads are separated by intervening elements, then short circuit risk is reduced, but the driving element size and height increase
Solution Approach 1:
The patent extracts the test pads from the area between transmission pads and relocates them outside the driving element's projection area. This removes the need for intervening elements between transmission pads, maintaining compact size while ensuring reliability through spatial separation.
3Reliability
If test pads are placed outside the driving element projection area, then short circuit risk is reduced, but the overall panel area increases
Solution Approach 1:
The patent utilizes the peripheral area of the substrate that would otherwise be unused or underutilized to place test pads. This multi-functional use of space achieves short circuit avoidance without significantly increasing the effective panel area, as the test pads are positioned in areas not required for active display functionality.
Data Source
AI summary
A panel circuit structure for transmitting electrical signals to an active area is provided. The panel circuit structure includes a first transmission pad, a first test pad, a second transmission pad, a second test pad, and a third transmission pad, which are connected to a driving element. The first transmission pad, the first test pad, the second transmission pad, and the second test pad transmit electrical signals to the active area via the first transmission lines and second transmission lines. The first transmission pads and the second transmission pads are disposed at a first end of the driving element while the third transmission pad is disposed at a second end of the driving element. The first and second test pads are disposed outside the coverage area of the driving element.