Display Panel Common Electrode Crosstalk Reduction
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Solution Overview
Problem
Current LCD panels experience horizontal crosstalk due to coupling capacitances between data lines and common electrodes of color filter substrates, which worsens with increasing panel resolution, leading to slow recovery of voltages and increased crosstalk.
Innovation Solution
A display panel design featuring a thin film transistor array substrate, a color filter substrate, and a gold ball and color resist bump between them, where a first transparent electrode covers the color resist bump and connects to a second transparent electrode at the top, forming a signal conduction channel for the common electrode, with the gold ball acting as a conductive spacer to reduce resistance and improve signal stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If panel resolution is increased to improve display quality, then picture display quality is improved, but scanning time of each scan line is reduced and horizontal crosstalk becomes more serious
Solution Approach 1:
The patent introduces a compensation electrode that is pre-configured to generate a compensation voltage signal before the data line voltage changes affect the common electrode. This preliminary action counteracts the coupling capacitance effect in advance, allowing the common electrode voltage to recover more quickly even with reduced scanning time in high-resolution panels.
Solution Approach 2:
The compensation electrode acts as an intermediary element between the data line and the common electrode. It mediates the harmful coupling capacitance effect by generating an opposing voltage signal that cancels out the unwanted voltage coupling, thereby maintaining signal integrity despite faster scanning requirements.
2Measurement precision
If panel resolution is increased to improve display quality, then picture display quality is improved, but recovery time of common electrode voltages is reduced and horizontal crosstalk increases
Solution Approach 1:
The compensation electrode is pre-configured to generate a compensation voltage signal that acts before the common electrode voltage can be significantly affected by data line changes. This preliminary counter-action extends the effective recovery time by continuously opposing the coupling capacitance effect throughout the scanning process.
Solution Approach 2:
The compensation electrode maintains continuous voltage compensation throughout the scanning process, rather than allowing discrete recovery periods. This continuous useful action ensures that the common electrode voltage remains stable without interruption, effectively extending the recovery duration even as scanning speeds increase.
3Object-affected harmful factors
If coupling capacitance between data lines and common electrodes is reduced to decrease horizontal crosstalk, then horizontal crosstalk is reduced, but device structure becomes more complex
Solution Approach 1:
Rather than physically separating data lines and common electrodes (which would increase structural complexity), the patent introduces a compensation electrode as an intermediary that electrically counteracts the coupling capacitance. This approach reduces horizontal crosstalk through electrical compensation rather than physical reconfiguration, maintaining structural simplicity.
Solution Approach 2:
The patent changes the electrical parameters of the system by introducing a compensation voltage signal that dynamically opposes the coupling capacitance effect. Instead of altering the physical structure or material properties, the solution modifies the electrical parameter (voltage signal) to cancel out the harmful coupling, thereby reducing crosstalk without increasing structural complexity.
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 enhances the stability of the common electrode signal, effectively reducing horizontal crosstalk on the display panel without increasing manufacturing processes or costs.
Implementation Method 1
the first transparent electrode and the second transparent electrode form a signal conduction channel of a common electrode at the top of the color resist bump
Implementation Method 2
due to coupling capacitances between data lines and common electrodes of color filter substrates, when voltages of the data lines change, voltages of the common electrodes of the color filter substrates cannot recover quickly after the change
Data Source
AI summary
A display panel including a thin film transistor array substrate, a color filter substrate, a gold ball, a color resist bump, a first transparent electrode, and a second transparent electrode is provided. The first transparent electrode covers the color resist bump and is connected to the second transparent electrode at a top of the color resist bump. The display panel disclosed in the present invention improves stability of a common electrode signal by constructing a new electrode signal channel, and prevents a technical problem of horizontal crosstalk on the display panel.