Liquid Crystal Display Pixel Electrode Oblique Branches
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Solution Overview
Problem
Liquid crystal molecules around the stem portion in liquid crystal displays are irregularly arranged due to fringe fields from stem and branch electrodes, leading to reduced transmittance.
Innovation Solution
A pixel electrode design with oblique branch electrodes and inverse oblique portions that extend in directions different from the branch electrodes, preventing irregular alignment of liquid crystal molecules and improving transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a pixel electrode includes a stem portion and branch electrodes extending in different directions to implement multiple domains, then the viewing angle is widened, but the liquid crystal molecules around the stem portion become irregularly arranged due to fringe fields, causing transmittance to deteriorate
Solution Approach 1:
The patent introduces inverse oblique portions that extend in directions opposite to the branch electrodes, creating an asymmetric electrode structure. This asymmetric design generates counteracting fringe fields that balance and neutralize the harmful fringe field effects from the branch electrodes, preventing irregular liquid crystal molecule arrangement while maintaining multiple domain functionality for wide viewing angle
Solution Approach 2:
The patent converts the harmful fringe fields from the branch electrodes into beneficial effects by adding inverse oblique portions. These inverse portions generate fringe fields that, while also being edge effects, act in opposite directions to cancel out the detrimental fringe field influences, transforming the problematic electromagnetic edge effects into a balancing mechanism that protects liquid crystal alignment
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 enhances the alignment of liquid crystal molecules, increasing the viewing angle and preventing transmittance deterioration by reducing the influence of fringe fields, thereby improving the display's performance.
Implementation Method 1
The liquid crystal display is a display device which rearranges liquid crystal molecules of the liquid crystal layer by applying a voltage to the electrodes
Implementation Method 2
since liquid crystal molecules arranged around the stem portion are influenced by a fringe field of the stem portion and a fringe field of the branch electrode
Data Source
AI summary
A liquid crystal display, including: a first substrate; a gate line and a data line disposed on the first substrate; a pixel electrode disposed on the first substrate and including a stem portion and a plurality of branch electrodes that extends obliquely from the stem portion; a second substrate facing the first substrate; and a common electrode disposed on the second substrate, and the pixel electrode further includes a plurality of oblique portions disposed between the plurality of branch electrodes and the stem portion, and the plurality of oblique portions extends in a direction different from a direction in which the plurality of branch electrodes extends.