Liquid Crystal Device Third Electrode Electric Field Interference
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Solution Overview
Problem
In high-resolution IPS liquid crystal display devices, the reduced distance between adjacent pixels leads to interference of electric fields, causing display quality degradation and incorrect image rendering due to the influence of signal and scanning lines on the electric field between pixel electrodes and common electrodes.
Innovation Solution
A liquid crystal device with a first and second substrate, a light shielding layer, and electrodes configured to minimize electric field interference between adjacent pixels, including a third electrode that suppresses the influence of electric fields and maintains symmetrical viewing angles, ensuring correct liquid crystal alignment and display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the pixel pitch is made small to increase resolution, then the display resolution is improved, but the electric field interference between adjacent pixels increases
Solution Approach 1:
A shielding electrode is introduced as an intermediary element positioned between adjacent pixels. This shielding electrode acts as a mediator that blocks or reduces the electric field interference from adjacent pixels, allowing high resolution to be maintained without suffering from increased electric field coupling. The shielding electrode is connected to a fixed potential (ground or common electrode potential) to effectively cancel out the interfering electric fields.
Solution Approach 2:
The display structure is segmented by introducing shielding electrodes that divide the continuous electrode structure into isolated pixel regions. This segmentation prevents the electric field from one pixel from extending into adjacent pixels, effectively compartmentalizing the electric field distribution and reducing interference while maintaining fine pixel pitch for high resolution.
2Quantity of substance
If the distance between adjacent pixels is decreased to increase pixel density, then the pixel density is improved, but the electric field disturbance from adjacent pixels increases
Solution Approach 1:
The shielding electrode serves as a protective intermediary positioned between high-density pixels. Even when pixels are densely packed, the shielding electrode maintains an electric field barrier that prevents disturbance from propagating to adjacent pixels, enabling high pixel density without compromising display quality through electric field interference.
Solution Approach 2:
The shielding electrode is connected to a fixed potential (ground or common electrode potential), creating an equipotential region between adjacent pixels. This equipotential barrier ensures that voltage variations in one pixel do not create electric field disturbances in adjacent pixels, allowing high pixel density to be achieved while maintaining stable electric field conditions in each pixel region.
3Adaptability or versatility
If signal lines and scanning lines are present to supply voltage and control signals, then the device functionality is improved, but the electric field between pixel electrodes and common electrodes is influenced
Solution Approach 1:
The shielding electrode acts as an intermediary barrier between the signal/scanning lines and the pixel electrodes. By positioning the shielding electrode between these conductive elements and the active pixel regions, it blocks the electric field influence from the signal and scanning lines, allowing full device functionality to be maintained without electric field interference affecting display quality.
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 suppresses electric field interference between adjacent pixels, maintaining high display quality and preventing visual discomfort by ensuring symmetrical viewing angles and correct liquid crystal alignment, even at high pixel densities.
Implementation Method 1
a liquid crystal layer that is interposed between the first and second substrates and is driven by an electric field generated between the first and second electrodes
Implementation Method 2
controlling the alignment direction of liquid crystal
Implementation Method 3
a third electrode that has an electrode portion formed along the first direction in a region, which is positioned between the pixels adjacent to each other in the second direction, of the surface of the second substrate facing the first substrate
Data Source
AI summary
An LCD having pixels arrayed along a first direction and a second direction crossing the first direction includes: opposite first and second substrates having facing first and second surfaces, respectively; a first light shielding layer formed along the second direction between the pixels adjacent in the first direction on the first surface; a first electrode formed within each pixel on the second surface and having a first electrode portion; a second electrode positioned between the pixels adjacent in the first direction on the second surface to at least partially overlap the first light shielding layer in plan view and having a second electrode portion extending along the first electrode portion; a third electrode having a third electrode portion formed along the first direction between the pixels adjacent in the second direction on the second surface.