Thin Film Transistor Array Substrate with Common Electrode Strip Holes
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Solution Overview
Problem
In traditional liquid crystal display (LCD) pixel designs, the large overlapping areas between sensing wires, gate lines, data lines, and the common electrode result in increased resistance-capacitance (RC) loading, leading to suboptimal display performance.
Innovation Solution
A thin film transistor array substrate with a common electrode layer featuring first and second strip holes that correspond to the gate lines and data lines, respectively, reducing the overlapping area and capacitance between the common electrode and sensing wires, gate lines, and data lines, thereby decreasing RC loading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the common electrode layer has large overlapping area with sensing wires, gate lines and data lines, then the capacitance between these components is increased, but the RC loading of the pixel becomes larger which deteriorates display performance
Solution Approach 1:
The common electrode layer is segmented by introducing first strip holes and second strip holes that divide it into multiple regions. These holes are strategically positioned to reduce overlapping areas with sensing wires, gate lines, and data lines, thereby reducing parasitic capacitance while maintaining the electrode's functional integrity
Solution Approach 2:
Specific portions of the common electrode layer are extracted by creating first strip holes and second strip holes. The first strip holes remove electrode material overlapping with sensing wires, while second strip holes remove material overlapping with gate lines and data lines, directly eliminating the source of parasitic capacitance
2Quantity of substance
If the overlapping area between common electrode and sensing wires is reduced, then the capacitance is decreased, but the structure becomes more complex with additional strip holes
Solution Approach 1:
The complexity is managed by segmenting the electrode modification into two distinct patterns: first strip holes for sensing wire regions and second strip holes for gate line and data line regions. This systematic segmentation makes the complex structure more manageable and manufacturable
Solution Approach 2:
The strip hole structure serves multiple functions simultaneously: it reduces parasitic capacitance, maintains electrode continuity in non-critical areas, and provides a manufacturable pattern that can be integrated into existing LCD fabrication processes
Data Source
AI summary
The present invention provides a thin film transistor array substrate and a liquid crystal display panel. The thin film transistor array substrate comprises: a substrate, and the substrate comprises a first surface and a second surface oppositely located; a thin film transistor array, located on the first surface; a common electrode layer, and the common electrode layer is isolated from the thin film transistor array, and the common electrode layer comprises a plurality of first strip holes; a sensing electrode layer, and the sensing electrode layer is isolated from the common electrode layer, and the sensing electrode layer comprises a plurality of sensing units and a plurality of sensing wires, and the sensing units are distributed in row and column, and the sensing wires are electrically coupled to the sensing units of each row or each column respectively, and the sensing wires are located corresponding to the first strip holes.