Liquid Crystal Display Panel Auxiliary Spacer Electrode
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Solution Overview
Problem
Liquid crystal display panels, such as IPS and FFS, suffer from the trace mura phenomenon where liquid crystal molecules fail to quickly recover to their original state after being pressed, leading to display quality issues due to the enlargement of disclination lines and chaos states.
Innovation Solution
A liquid crystal display panel design featuring an auxiliary spacer with a top electrode that connects the pixel and common electrodes when pressed, eliminating the voltage difference and allowing liquid crystal molecules to quickly return to their lying state by eliminating the vertical electric field.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the liquid crystal display panel uses IPS or FFS structure to achieve wide viewing angles and high color fidelity, then the light flux control performance is improved, but the trace mura phenomenon occurs when the panel is pressed
Solution Approach 1:
A third electrode is introduced as an intermediary element between the pixel electrode and common electrode. This third electrode, positioned closer to the liquid crystal layer, acts as a mediator to generate an electric field that actively drives liquid crystal molecules back to their original state after pressing, thereby resolving the trace mura phenomenon while preserving the wide viewing angle and color fidelity benefits of IPS/FFS structures
2Adaptability or versatility
If the liquid crystal molecules are rotated in a plane parallel to the substrate to control light flux, then the viewing angle and color fidelity are improved, but the disclination lines are enlarged when the panel is pressed
Solution Approach 1:
The third electrode is pre-configured in position and potential to provide preliminary anti-action against the harmful effect of pressing. When pressing occurs, the third electrode immediately generates an opposing electric field that counteracts the disclination line enlargement and forces liquid crystal molecules to return to their original orientation, thereby preventing the trace mura phenomenon while maintaining wide viewing angle adaptability
3Ease of operation
If the distance between the first and second baseplates is reduced when pressed, then the contact between electrodes is improved, but the liquid crystal molecules fail to recover quickly to the original state
Solution Approach 1:
The electrode system is segmented into three distinct electrodes: pixel electrode, common electrode, and third electrode. The third electrode is positioned closer to the liquid crystal layer and can be independently controlled. This segmentation allows the third electrode to generate a focused, high-strength electric field that acts directly on the liquid crystal molecules, enabling rapid recovery to the original state even when the baseplate distance is reduced during pressing
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
The solution effectively alleviates the trace mura phenomenon by ensuring liquid crystal molecules can quickly recover to their original state, improving display performance and quality by eliminating the vertical electric field component.
Implementation Method 1
the top electrode touches the extending electrode of the common electrode and the extending electrode of the pixel electrode and enables the common electrode and the pixel electrode to be connected with each other when the panel is pressed
Implementation Method 2
the light flux is controlled by the rotation of the liquid crystal molecules in a plane parallel to the substrate
Data Source
AI summary
A liquid crystal display panel is disclosed. The liquid crystal display panel comprises a first baseplate; a second baseplate, arranged at a position opposite to the first baseplate and being provided with a pixel electrode and a common electrode thereon; and an auxiliary spacer, arranged between the first baseplate and the second baseplate and fixed on the first baseplate, wherein the auxiliary spacer is provided with a top electrode, and the second baseplate is provided with an extending electrode of the common electrode and an extending electrode of the pixel electrode at a position corresponding to the top electrode, so that the top electrode touches the extending electrode of the common electrode and the extending electrode of the pixel electrode and enables the common electrode and the pixel electrode to be connected with each other when the panel is pressed.