Pixel Electrode Design for Liquid Crystal Alignment
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Solution Overview
Problem
Liquid crystal display panels prone to trace mura due to disordered electric fields at electrode junctions, leading to disordered liquid crystal arrangements and display defects.
Innovation Solution
A pixel electrode design with strip-shaped first electrodes, a second electrode connecting one end, and a third electrode connecting the other end, where the electric field direction at the third electrode's location intersects with both the first and second directions, ensuring a regular electric field at the junction and maintaining liquid crystal alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional electrode junction design is used, then device complexity is reduced, but electric field regularity deteriorates causing trace mura
Solution Approach 1:
The pixel electrode is segmented into multiple strip-shaped first electrodes arranged in parallel, with separate second and third electrodes connecting different ends. This segmentation allows independent optimization of electric field distribution at different junctions, ensuring regular electric fields at connection points while maintaining overall device functionality.
Solution Approach 2:
Different regions of the pixel electrode are designed with different connection configurations. The second electrode connects to first ends of all strip electrodes, while the third electrode connects to second ends of at least some strip electrodes. This local differentiation ensures that electric fields at all junctions maintain regular directions, preventing trace mura in specific display regions.
2Manufacturing precision
If electrode configuration ensures regular electric field, then liquid crystal alignment is maintained, but manufacturing complexity increases
Solution Approach 1:
The second electrode is designed to connect to first ends of multiple strip electrodes, creating an equipotential region that ensures uniform electric field direction at this junction. Similarly, the third electrode connects to second ends, establishing another equipotential region. This equipotential design simplifies the achievement of regular electric fields during manufacturing.
Solution Approach 2:
The second electrode serves as a common connection for first ends of all strip electrodes, while the third electrode provides common connection for second ends. This multi-functional design ensures regular electric fields at multiple junctions simultaneously, achieving consistent liquid crystal alignment across the entire pixel electrode without requiring separate treatments for each connection point.
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
Prevents trace mura by ensuring regular liquid crystal arrangement after external forces are applied, enhancing display panel performance and light efficiency.
Implementation Method 1
a direction of an electric field of an area in which the third electrode is disposed intersects with both the first direction and the second direction
Implementation Method 2
the common electrode and the pixel electrode are configured to drive a liquid crystal in the liquid crystal layer to rotate
Data Source
AI summary
A pixel electrode, including: a plurality of strip-shaped first electrodes, where the plurality of the first electrodes are arranged along a first direction, each of the first electrodes extends along a second direction, and the second direction intersects with the first direction; a second electrode, where the second electrode is connected to first ends of the plurality of first electrodes, and the first ends of the plurality of first electrodes are connected through the second electrode; and a third electrode, where the third electrode is connected to a second end of at least one of the first electrodes, and a direction of an electric field of an area in which the third electrode is disposed intersects with both the first direction and the second direction.