Branched Source Layout in Array Substrates to Avoid Display Line Defects
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Solution Overview
Problem
Conventional liquid crystal display panels are prone to short circuits between the drain and data lines due to metal residues or foreign objects, resulting in bright spots or defective vertical lines on the display.
Innovation Solution
The array substrate design includes a thin film transistor with a source having two branch portions that define a range for the drain and connection hole, reducing the occupied area by the drain and preventing short circuits, thereby enhancing display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the drain and data lines are disposed close to each other in conventional structure, then the area occupied by the drain is reduced, but the drain is easily connected to the data lines causing short circuits
Solution Approach 1:
The source is divided into two branch portions that extend in opposite directions, creating a segmented structure that defines a range for the drain. This segmentation allows the drain to be positioned within the defined range, reducing its occupied area while maintaining sufficient distance from the data line to prevent short circuits.
Solution Approach 2:
The two branch portions of the source act as an intermediary structure that defines a spatial range between the drain and the data line. This intermediary structure creates a protective boundary that prevents direct contact between the drain and data line, eliminating the short circuit risk while allowing compact drain positioning.
2Object-affected harmful factors
If the drain area is reduced to minimize bright spots, then the display quality is improved, but the drain may become too small to function properly
Solution Approach 1:
The drain is nested within the range defined by the two branch portions of the source. This nesting arrangement allows the drain to be compact (reducing bright spots) while still maintaining its functional integrity, as it is contained within the protective spatial boundary created by the branch portions.
Solution Approach 2:
The branch portions serve as an intermediary structure that protects the drain's functionality while allowing it to be small in area. By positioning the drain within the defined range, the branch portions ensure the drain remains functional without requiring excessive area, thus preventing both bright spots and functionality loss.
3Reliability
If the source is designed with two branch portions, then the drain can be positioned more precisely to prevent short circuits, but the device complexity increases
Solution Approach 1:
The source is segmented into two branch portions that extend in opposite directions from the gate. This segmentation provides a simple yet effective way to define a spatial range for the drain, enabling precise positioning for short circuit prevention without requiring complex multi-component structures.
Solution Approach 2:
The two branch portions of the source serve multiple functions: they act as electrical conduits for current flow and simultaneously define the spatial range for drain positioning. This multi-functionality reduces the need for additional structural elements, maintaining device simplicity while achieving reliable short circuit prevention.
Data Source
AI summary
An array substrate and a display panel are provided. By arranging a drain and a connection hole in a range defined by two branch portions of a source, an area occupied by the drain is reduced, and the defective problems of bright spots or vertical lines displayed on the display panel due to a short circuit of the drain and data lines can be avoided.