Liquid Crystal Display Panel Electrostatic Shielding via Conductive Layer
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Solution Overview
Problem
Liquid crystal display panels face interruptions in liquid crystal rotation due to electrostatic interference, which affects the display quality.
Innovation Solution
Incorporating an electrical conducting layer with gold particles or ITO film, electrically coupled to the common electrode wiring, provides an electrostatic shielding effect by creating a planar electric field that maintains the orientation of liquid crystals, thereby enhancing display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an electrical conducting layer is added to provide electrostatic shielding, then liquid crystal rotation stability is improved, but device complexity increases
Solution Approach 1:
The electrical conducting layer is nested within the existing panel structure, positioned between the color filter substrate and the liquid crystal layer. This nested configuration allows the shielding function to be integrated without adding external components, thus improving liquid crystal rotation stability while minimizing increases in device complexity.
Solution Approach 2:
The electrical conducting layer acts as an intermediary element that mediates between the color filter substrate and the liquid crystal layer. It provides electrostatic shielding by creating a conductive barrier that prevents interference from affecting the liquid crystal molecules, thereby stabilizing rotation without requiring fundamental changes to the panel architecture.
2Reliability
If gold particles or ITO film are used for electrical conducting layer, then electrostatic shielding effect is improved, but manufacturing cost increases
Solution Approach 1:
The patent allows for parameter changes in the electrical conducting layer by offering alternative materials (gold particles or ITO film) with different properties. Gold particles provide superior electrostatic shielding but at higher cost, while ITO film offers a more cost-effective solution with adequate shielding performance. This parameter flexibility enables optimization between shielding effectiveness and manufacturing cost based on specific application requirements.
Solution Approach 2:
The use of gold particles suspended in a resin material creates a composite electrical conducting layer that combines the high conductivity of gold with the processability and cost benefits of resin-based materials. This composite approach achieves effective electrostatic shielding while potentially reducing costs compared to using pure metal films, as the resin matrix provides structural support and ease of application.
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 electrostatic shielding effect ensures uninterrupted liquid crystal rotation, improving the overall quality and reliability of the liquid crystal display panel.
Implementation Method 1
an electrical conducting layer with gold particles or ITO film, electrically coupled to the common electrode wiring, provides an electrostatic shielding effect by creating a planar electric field that maintains the orientation of liquid crystals
Data Source
AI summary
A liquid crystal display panel includes a first substrate, a second substrate parallel to the first substrate, a liquid crystal layer located between the first substrate and the second substrate and parallel to the first substrate and the second substrate, a common electrode layer and a pixel electrode located between the first substrate and the second substrate, and an electrical conducting layer located on a side of the second substrate opposite from the first substrate. The electrical conducting layer is electrically coupled to a common electrode wiring located on an outer peripheral portion of the first substrate. The pixel electrode and the common electrode layer are configured to cooperatively induce an electric field to drive liquid crystals of the liquid crystal layer to rotate.