Dielectric Member on LCD Sub-Pixel Connection for Alignment Stability
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Solution Overview
Problem
Liquid crystal display devices face misalignment issues due to weak alignment control at electrical connections between sub-pixels, leading to poor display quality and reduced transmittance when the panel is pushed, as the alignment of liquid crystal molecules is not stable and often lost.
Innovation Solution
A dielectric member is provided on the connection portion between sub-pixels to electrically separate them, ensuring stable alignment of liquid crystal molecules, which allows for recovery of alignment after a surface push and minimizes misalignment, thereby improving display quality and transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a pixel is divided into multiple sub-pixels with a common electrode at the center, then alignment control is improved for each sub-pixel, but the alignment control at the electrical connection portion becomes weak and unstable
Solution Approach 1:
The patent applies local quality by providing a dielectric member specifically at the connection portion between sub-pixels, where alignment control was previously weak. This localized addition of a dielectric member enhances the alignment control precisely at the problematic connection area without affecting the overall pixel structure. The dielectric member creates localized electric fields that stabilize liquid crystal molecule alignment at the connection portion, resolving the contradiction between achieving good alignment control in sub-pixels and maintaining stability at connection points.
2Reliability
If the alignment of liquid crystal molecules is lost due to surface push, then the display quality deteriorates, but reducing the cell gap can help prevent misalignment
Solution Approach 1:
The patent uses a dielectric member as an intermediary element between the pixel electrode and the liquid crystal layer. This dielectric member mediates the interaction by creating electric fields that actively control and stabilize liquid crystal molecule alignment. When surface push occurs, the dielectric member's electric fields work to restore and maintain alignment, acting as a protective intermediary that prevents misalignment without requiring reduced cell gap. This resolves the contradiction by providing alignment stability through an intermediate mechanism rather than through cell gap reduction.
3Ease of operation
If sub-pixels are electrically connected through a common electrode, then electrical connectivity is achieved, but the alignment control element cannot effectively control alignment at the connection portion
Solution Approach 1:
The patent applies segmentation by dividing the pixel into multiple sub-pixels with separate pixel electrodes, while adding a dielectric member at the connection portion to provide localized alignment control. This segmentation allows each sub-pixel to have its own electrode for independent electrical control, while the dielectric member at the connection portion provides specialized alignment control for that specific area. This resolves the contradiction by segmenting the pixel structure to enable both electrical connectivity through separate electrodes and effective alignment control through the localized dielectric member.
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 stabilizes liquid crystal molecule alignment, preventing misalignment and improving display quality, allowing for increased transmittance without the need for a reduced cell gap, thus enhancing the viewing angle and overall display performance.
Implementation Method 1
liquid crystal molecules can be aligned radially around an alignment control element, e.g., dielectric member, 34 that is provided to a pixel electrode (common electrode) 32
Implementation Method 2
liquid crystal molecules 22 can be aligned radially around an alignment control element, e.g., dielectric member, 34... With the radial alignment of the liquid crystal molecules 22 as such, any perceivable change of intensity from the direction of the azimuth angle is reduced
Data Source
AI summary
A liquid crystal display device is disclosed. The liquid crystal display includes a liquid crystal layer disposed between substrates opposing each other. A pixel of the liquid crystal display is alignment-divided into a plurality of sub-pixels. A dielectric member is provided on a connection portion where the sub-pixels are electrically connected.