Display Panel Common Electrode Enlarging Part Crosstalk Reduction
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Solution Overview
Problem
Large-size liquid crystal displays experience undesirable crosstalk phenomena due to instability in the common electrode, particularly when data lines are changed, resulting in poor voltage recovery to a reference voltage source.
Innovation Solution
The display panel incorporates a second common electrode with an enlarging part and support parts, including conductive metal balls, to enhance electrical connection and capacitive coupling, allowing for rapid and even potential distribution across the first common electrode, thereby improving voltage recovery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the common electrode uses traditional wiring structure, then the device complexity is low, but the voltage recovery speed is slow causing crosstalk
Solution Approach 1:
The common electrode is segmented into multiple independent conductive structures (first common electrode on array substrate, second common electrode on color film substrate with enlarging part). This segmentation allows each electrode to be optimized independently for faster voltage recovery while reducing mutual interference that causes crosstalk.
Solution Approach 2:
The patent introduces a new spatial dimension by placing the second common electrode on the color film substrate rather than only on the array substrate. The enlarging part extends in the horizontal direction, creating a three-dimensional electrode configuration that accelerates potential distribution and voltage recovery.
2Manufacturing precision
If the line width of common electrode is reduced, then the manufacturing precision is improved, but the electrical connection stability deteriorates
Solution Approach 1:
The second common electrode features non-uniform line width with an enlarging part having greater width than the wiring parts. This local quality variation provides high manufacturing precision for the narrow wiring parts while the enlarging part ensures stable electrical connection and rapid potential distribution.
Solution Approach 2:
The enlarging part is pre-configured at specific positions where rapid potential distribution is needed. This preliminary structural arrangement ensures that when voltage changes occur, the electric field is already optimized for fast recovery without requiring real-time adjustment.
3Ease of manufacture
If the common electrode structure is simplified, then the ease of manufacture is improved, but the crosstalk phenomenon increases
Solution Approach 1:
The liquid crystal layer serves as an intermediary medium between the first and second common electrodes. The enlarged overlapping area between electrodes through the liquid crystal layer enhances capacitive coupling, enabling fast voltage recovery and reducing crosstalk while maintaining relatively simple manufacturing processes.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration significantly reduces crosstalk by ensuring stable and rapid voltage recovery to the reference voltage source when data lines are changed, enhancing display performance.
Implementation Method 1
the support part comprises conductive metal balls, the conductive metal balls are sandwiched between the first common electrode and the second common electrode... the conductive metal balls are in communication with the first common electrode and the second common electrode
Implementation Method 2
The conductive metal balls are disposed on the enlarging part... allowing for rapid and even potential distribution across the first common electrode, thereby improving voltage recovery
Data Source
AI summary
This application discloses a display panel and a display device, the display panel including: a first substrate; a second substrate; and a second common electrode, disposed on the second substrate, where the second common electrode includes an enlarging part, and the display panel includes a support part disposed corresponding to the enlarging part.