LCD Pixel Electrode Pattern for Light Leakage Prevention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Liquid crystal display (LCD) panels employing dual field switching (DFS) modes face issues with light leakage and texture generation due to step height formation and decreased storage capacitor capacity, which affect light transmittance and aperture ratio.
Innovation Solution
The design includes a pixel electrode pattern with inclined linear pixel electrodes, a central electrode, and a storage pattern with specific electrode configurations to prevent light leakage and texture formation, featuring a texture prevention portion connected to the TFT and a storage line formed of the same material as the gate line, ensuring no step height is created and fringe electric fields are consistently generated.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If dual field switching (DFS) mode is employed to improve side visibility and light transmittance, then light transmittance is improved, but step height is formed causing light leakage
Solution Approach 1:
The patent applies local quality by creating different electrode configurations in different regions of the pixel electrode. The pixel electrode includes a first electrode connection portion, a second electrode connection portion, and a central portion with a different potential, forming localized electric field regions that control light transmission while preventing leakage at specific locations.
Solution Approach 2:
The pixel electrode is segmented into multiple functional portions: first electrode connection portion connected to data line, second electrode connection portion connected to gate line, and central portion with different potential. This segmentation allows independent control of different regions to achieve both high transmittance and prevent light leakage.
2Illumination intensity
If dual field switching (DFS) mode is employed to improve side visibility and light transmittance, then light transmittance is improved, but storage capacitor capacity is decreased
Solution Approach 1:
The patent merges the pixel electrode and storage electrode functions into a single integrated structure. The pixel electrode pattern serves dual purposes: controlling liquid crystal for light transmission and forming storage capacitor with the common electrode, thereby maintaining storage capacity while achieving improved light transmittance.
Solution Approach 2:
The pixel electrode structure is designed to perform multiple functions simultaneously: it acts as both the pixel electrode for light control and the storage electrode for data retention. This multi-functionality eliminates the need for separate electrodes, maintaining storage capacitor capacity while improving optical performance.
3Ease of operation
If pixel electrode and drain electrode are connected to control liquid crystal, then liquid crystal operation is achieved, but undesirable texture is generated
Solution Approach 1:
The patent applies local quality by creating a central portion in the pixel electrode with a different potential from the electrode connection portions. This localized potential difference generates a specific electric field distribution that controls liquid crystal orientation uniformly, preventing texture generation while maintaining operational control.
Solution Approach 2:
The patent creates equipotential regions in the electrode connection portions while maintaining a different potential in the central portion. This equipotential design ensures uniform electric field distribution in the central region, preventing liquid crystal alignment issues and texture formation.
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
This configuration effectively prevents light leakage and texture generation, enhancing light transmittance and maintaining the capacity of the storage capacitor, thereby improving the overall performance of the LCD panel.
Implementation Method 1
a liquid crystal is aligned horizontally or vertically to an electric field generated between electric patterns of upper and lower substrates
Implementation Method 2
In the DFS mode, a liquid crystal is aligned horizontally or vertically to an electric field generated between electric patterns of upper and lower substrates
Implementation Method 3
as a result, an optical axis of a liquid crystal layer is rotated relative to the substrate
Implementation Method 4
a black brightness is increased by the light leakage thereby causing the capacity of a storage capacitor to be decreased
Data Source
AI summary
A liquid crystal display (LCD) panel includes: a first base substrate; a plurality of gate lines and a plurality of data lines disposed on the first base substrate and crossing each other; a pixel electrode pattern disposed on the first base substrate; a storage pattern disposed on the first base substrate, the storage pattern being positioned between consecutive gate lines and substantially in parallel with the gate lines; a second base substrate; a common electrode disposed on the second base substrate and alternately positioned with the pixel electrode; and a liquid crystal layer disposed between the first and second base substrates.