Jagged Shielding Electrode for LCD Light Leakage
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Solution Overview
Problem
Liquid crystal displays (LCDs) face light leakage issues due to the electric field between pixel electrodes and scanning lines, which also reduce the aperture ratio, leading to energy consumption problems.
Innovation Solution
A pixel electrode structure with a shielding electrode having a jag structure that overlaps the scanning line and is electrically connected to the pixel electrode, preventing the abnormal orientation of liquid crystals and reducing light leakage while maintaining or increasing the aperture ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If common techniques are used to improve light leakage, then light leakage is reduced, but aperture ratio is reduced
Solution Approach 1:
The shielding electrode is divided into multiple segments with jagged edges rather than a continuous structure. This segmentation allows the shielding function to be distributed across multiple smaller elements, reducing the overall area occupied while maintaining effective electric field shielding against scanning lines.
Solution Approach 2:
The shielding electrode employs asymmetric jagged edge designs with varying tooth patterns and orientations. This asymmetry allows optimized positioning and shaping of the shielding structure to cover only the necessary areas for light leakage prevention, minimizing the impact on aperture ratio while maintaining shielding effectiveness.
2Object-affected harmful factors
If shielding electrode is added to prevent light leakage, then light leakage is reduced, but device complexity increases
Solution Approach 1:
The shielding electrode is integrated with the pixel electrode structure, combining the shielding function with the existing pixel electrode layer. This merging approach eliminates the need for separate shielding structures, reducing overall device complexity while maintaining light leakage prevention capabilities.
Solution Approach 2:
The pixel electrode serves multiple functions: it acts as both the functional pixel electrode for display and as a shielding electrode against scanning line electric fields. This multi-functionality reduces the need for additional dedicated shielding components, simplifying the overall device structure.
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 prevents light leakage and enhances the aperture ratio, improving display quality by reducing dark lines and increasing luminance and energy efficiency.
Implementation Method 1
a shielding electrode overlapping one side of the scanning line and electrically connected to the pixel electrode with a first connecting part
Data Source
AI summary
The present invention relates to a pixel electrode structure, comprising: at least one scanning line disposed on a substrate; at least one data line disposed on the substrate and intersecting the scanning line to define a pixel area; a pixel electrode disposed in the pixel area; an active element comprising a gate electrode, a source electrode and a drain electrode, wherein the gate electrode is electrically connected to the scanning line, the source electrode is electrically connected to the data line, and the drain electrode is electrically connected to the pixel electrode; and a shielding electrode overlapping one side of the scanning line and electrically connected to the pixel electrode with a first connecting part, wherein the shielding electrode has a jag structure, and the first connecting part is disposed at a junction between jags of the jag structure protruding in different orientations.