Pixel Electrode Notches Eliminate Dark Lines in LCD Panels
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Solution Overview
Problem
In multi-domain vertical alignment liquid crystal displays, the existing pixel electrodes cause liquid crystal molecules at pixel boundaries to tilt in a direction opposite to the ideal direction, resulting in dark lines and loss of light transmittance due to conflicting driving forces from side and sub-pixel electrodes.
Innovation Solution
A pixel electrode design featuring a trunk electrode in a cross shape with branch and side electrodes, including notches and protrusions, and slits that align liquid crystal molecules to prevent interference and achieve ideal tilting, comprising a main and sub-pixel electrode structure with a control component for electrical connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional pixel electrode design with eight domains is used, then viewing angle performance is improved, but liquid crystal molecules at pixel boundaries tilt in opposite direction causing dark lines and light transmittance loss
Solution Approach 1:
The side electrodes are segmented by introducing notches that divide each side electrode into multiple sections. This segmentation allows independent control of electric field distribution at different regions, enabling precise management of liquid crystal alignment at pixel boundaries while maintaining overall viewing angle performance.
Solution Approach 2:
The notches are strategically positioned at specific locations where pixel boundary alignment issues occur. By modifying the electric field distribution only at these critical local regions rather than uniformly across the entire electrode, the invention achieves improved alignment control where needed without compromising overall display performance.
2Adaptability or versatility
If side electrodes and sub-pixel electrodes apply simultaneous driving forces at pixel boundaries, then domain coverage is improved, but conflicting forces cause poor alignment control and opposite tilting
Solution Approach 1:
The notches act as intermediary structures that mediate between the side electrodes and sub-pixel electrodes. By introducing these notched features, the invention creates a transition zone that harmonizes the conflicting electric field forces from different electrodes, enabling them to work cooperatively rather than antagonistically at pixel boundaries.
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 design effectively maintains opposite alignment directions of liquid crystal molecules at pixel boundaries, eliminating dark lines and improving light transmittance by preventing interference and ensuring consistent tilting directions.
Implementation Method 1
driving forces from side electrodes of trunk electrodes and sub-pixel electrodes simultaneously exist at the pixel boundaries, making an effect of controlling orientation of the liquid crystal molecules thereof poor
Data Source
AI summary
The present invention provides a pixel electrode and a liquid crystal display panel. A first side electrode and a second side electrode are respectively connected to both ends of a first trunk electrode, and a third side electrode and a fourth side electrode are respectively disposed on sides of the first side electrode and the second side electrode away from a branch electrode. Each of the first side electrode and the second side electrode is provided with a notch at a junction with the first trunk electrode, and the two notches are respectively disposed on the sides of the first side electrode and the second side electrode away from the branch electrode, which can relieve dark lines at pixel boundaries.