Array Substrate Common Electrode Segmentation for Crosstalk Reduction
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Solution Overview
Problem
The 4-mask process technology in thin film transistor liquid crystal display panels leads to horizontal crosstalk due to differences in polarity between capacitor electrode plates caused by the semiconductor layer between the first and second metal layers.
Innovation Solution
The array substrate design includes a substrate with a first common electrode, a semiconductor layer, and a second electrode layer with a drain and source electrode, where the second common electrode is connected to the first common electrode through an opening in the insulating layer, forming a storage capacitor to prevent polarity differences and alleviate horizontal crosstalk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If 4-mask process technology is used to simplify manufacturing and reduce costs, then manufacturing complexity and cost are reduced, but horizontal crosstalk occurs due to polarity differences between capacitor electrode plates
Solution Approach 1:
The capacitor electrode structure is segmented into multiple layers: a first capacitor electrode plate in the first metal layer, a second capacitor electrode plate in the second metal layer, and a third capacitor electrode plate in the transparent conductive layer. This segmentation allows each electrode plate to be independently configured to ensure uniform polarity and eliminate horizontal crosstalk while maintaining the simplified 4-mask manufacturing process.
2Device complexity
If a semiconductor layer is present between the first and second metal layers, then the thin film transistor structure is formed, but polarity differences between capacitor electrode plates cause horizontal crosstalk
Solution Approach 1:
The first capacitor electrode plate, second capacitor electrode plate, and third capacitor electrode plate are all connected to the same potential through the common electrode connection. This equipotential configuration ensures that all capacitor electrode plates maintain uniform polarity despite the presence of the semiconductor layer, thereby eliminating horizontal crosstalk while preserving the thin film transistor structure.
Data Source
AI summary
The present application discloses a display panel, an array substrate, and a manufacturing method thereof. In the display panel of the present application, capacitance of a array substrate is formed between a first common electrode and a pixel electrode, and a second electrode layer is provided with a second common electrode in a same layer as a drain electrode and a source electrode, and the first common electrode is connected to the second common electrode, which can prevent a difference between positive and negative polarities of the first common electrode and the pixel electrode, thereby solving the problem of horizontal crosstalk.