Display Panel Data Switching Line Layer Placement
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Solution Overview
Problem
Display panels face a high risk of short circuits due to charge accumulation during manufacturing processes, particularly in the data switching line, which affects the display quality and performance.
Innovation Solution
The data switching line is positioned in the same layer as the source-drain layer of switching transistors rather than the gate of thin-film transistors, reducing charge accumulation and the risk of short circuits, and is configured to control the switching transistors, thereby improving the display panel's reliability and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the data switching line is disposed in the same layer as the gate of thin-film transistor, then the control function is achieved, but the risk of short circuit increases due to charge accumulation during manufacturing processes
Solution Approach 1:
The patent relocates the data switching line from the gate layer to the source-drain layer, changing its vertical position in the device structure. This dimensional relocation separates the data switching line from the gate electrode, eliminating the charge accumulation problem that occurred when both were in the same layer, while maintaining the control function through alternative routing.
Solution Approach 2:
The data switching line is extracted from the gate layer and placed in the source-drain layer. This extraction removes the harmful interaction between the data switching line and gate electrode, preventing charge accumulation during photolithographic and dry etching processes, while the control function is preserved through the new layer configuration.
2Reliability
If the data switching line is disposed in the same layer as the source-drain layer, then the charge accumulation and short circuit risk are reduced, but the control precision may be affected
Solution Approach 1:
The patent introduces an intermediary connection structure that links the data switching line in the source-drain layer to the gate electrode. This intermediary mechanism allows the data switching line to control the switching transistor indirectly, maintaining control precision while avoiding direct contact with the gate electrode that caused charge accumulation issues.
Data Source
AI summary
A display panel and a display device. The display panel includes a test circuit located in a non-display region. The test circuit includes a plurality of switching transistors and at least one data switching line extending in a first direction. In each switching transistor, a first end of the switching transistor is electrically connected to a data line in the display panel, and a second end of the switching transistor is configured to receive a test data signal. The data switching line is disposed in the same layer as a source-drain layer of the switching transistor. The data switching line is configured to control the switching transistor to be turned on or off.