Liquid Crystal Display Panel Trunk Electrode Voltage Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In high-resolution liquid crystal display panels, such as 8K products, the reduced pixel size leads to poor liquid crystal diffusion due to external forces, causing liquid crystal molecules to become disordered and fail to return to their original state, affecting display quality.
Innovation Solution
A liquid crystal display panel design featuring a first substrate and a second substrate with a liquid crystal layer, where a first metal line on the first substrate covers part of the trunk electrode, maintaining a small voltage difference with the common electrode to prevent liquid crystal molecule deflection, thereby ensuring proper recovery and reducing light leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the pixel size is reduced to increase display resolution, then the display resolution is improved, but the liquid crystal diffusion performance deteriorates due to insufficient recovery force
Solution Approach 1:
The patent applies different voltage strategies to different regions of the pixel electrode. The first trunk electrode region receives a limited voltage difference (≤1V) to maintain liquid crystal orientation and enable recovery, while other regions operate with normal voltage differences for full display functionality. This local differentiation resolves the contradiction by protecting the critical trunk electrode area from excessive voltage-induced disorder while maintaining overall display resolution.
Solution Approach 2:
The patent creates an equipotential condition between the first metal line and the common electrode by limiting their voltage difference to ≤1V. This equipotential approach prevents significant liquid crystal deflection in the trunk electrode region, ensuring that liquid crystal molecules maintain their original orientation and can properly diffuse when pressed, thus resolving the contradiction between high resolution and reliable liquid crystal diffusion.
2Area of moving object
If the area ratio of the trunk electrode is increased in high-resolution displays, then the aperture ratio is improved, but the liquid crystal diffusion problem worsens due to higher stress concentration
Solution Approach 1:
The patent applies a specialized voltage control scheme specifically to the trunk electrode region where the high area ratio creates stress concentration. By limiting the voltage difference across the first trunk electrode to ≤1V, the patent locally protects this high-stress region from excessive liquid crystal deflection, while allowing other regions to function normally. This resolves the contradiction by enabling the trunk electrode to maintain both its large area for high aperture ratio and its structural integrity for proper liquid crystal diffusion.
3Illumination intensity
If a large voltage difference is applied to the pixel electrode for full display coverage, then the display brightness is improved, but the liquid crystal molecule orientation deteriorates leading to poor recovery
Solution Approach 1:
The patent implements a local voltage control strategy where the first trunk electrode region receives a limited voltage difference (≤1V) to maintain liquid crystal orientation stability, while other pixel electrode regions receive full voltage differences for optimal display brightness. This spatially differentiated approach resolves the contradiction by protecting the critical orientation stability in the trunk electrode region while maintaining overall display brightness through normal operation of other regions.
Solution Approach 2:
The patent creates an equipotential condition in the first trunk electrode region by limiting the voltage difference between the first metal line and common electrode to ≤1V. This equipotential approach prevents significant liquid crystal deflection and maintains molecular orientation stability, resolving the contradiction between display brightness and liquid crystal orientation stability in this critical region.
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 design enhances the recovery force of liquid crystal molecules, preventing poor diffusion when pressed and improving display quality by maintaining the liquid crystals in an opaque state, thus maintaining aperture ratio and transmittance.
Implementation Method 1
A voltage difference between the common electrode and the first metal line causes a liquid crystal molecule corresponding to the first metal line to be in an opaque state
Data Source
AI summary
A liquid crystal display panel and a display device are provided. A first metal line is disposed on a first substrate of the liquid crystal display panel. An orthographic projection of the first metal line on a pixel electrode covers a first trunk electrode. A voltage difference V1 between the first metal line and a common electrode is small, so that a liquid crystal molecule corresponding to the first metal line does not deflect. In this way, a problem of an insufficient liquid crystal recovery force when the liquid crystal display panel is pressed is resolved, eliminating poor liquid crystal diffusion as a result of pressing and resulting in improving display quality.