Liquid Crystal Display Panel Shielding Wire
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Solution Overview
Problem
Conventional MVA liquid crystal display panels experience dark lines at spacing regions due to liquid crystals being tilted at large angles under differential electric fields between pixel and sub-pixel electrodes, affecting transmittance.
Innovation Solution
The introduction of a first electromagnetic shielding wire with a voltage equal to the common electrode, positioned between the main and secondary pixel electrodes, increases the distance between them and equalizes the electric field, preventing liquid crystal tilting and dark line formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the main pixel electrode and sub-pixel electrode are arranged at intervals in the light-transmission area, then the pixel unit can be divided into main area and sub-area for signal transmission, but the liquid crystal at the spacing region will be tilted at large angle under differential electric field, resulting in dark lines and reduced transmittance
Solution Approach 1:
An electromagnetic shielding wire is introduced as an intermediary component between the main pixel electrode and sub-pixel electrode. This shielding wire, connected to the common electrode, mediates the electric field distribution in the spacing region, preventing the liquid crystal from tilting at large angles and eliminating dark lines while maintaining the segmented pixel electrode arrangement
Solution Approach 2:
The electromagnetic shielding wire is connected to the common electrode to establish equipotential conditions in the spacing region. By making the shielding wire and common electrode equipotential, the differential electric field that causes liquid crystal tilting is eliminated, ensuring uniform electric field distribution and preventing dark line 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 solution eliminates differential pressure at the spacing region, preventing liquid crystal tilting and dark line formation, thereby enhancing the display panel's transmittance and aperture ratio.
Implementation Method 1
the electric field between the pixel electrode and the common electrode drives the liquid crystal to rotate
Implementation Method 2
disposing a first electromagnetic shielding wire at the spacing region between the first pixel electrode and the second pixel electrode
Data Source
AI summary
A liquid crystal display panel includes an array substrate and a color filter substrate. Each of the pixel units includes a thin film transistor layer and a pixel electrode disposed on the thin film transistor layer. The pixel electrode includes a first pixel electrode and a second pixel electrode, and a spacing region disposed between the first pixel electrode and the second pixel electrode.