Liquid Crystal Display Panel Conductive Edge Structure for Image Sticking
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Solution Overview
Problem
Image sticking in liquid crystal display panels, caused by residual charges, particularly in the peripheral regions, leads to display quality issues due to the retention of images and the generation of parasitic electric fields.
Innovation Solution
A liquid crystal display panel with a conductive structure surrounding the liquid crystal layer and a driving circuit that applies alternating voltages to the edges, allowing residual charges to be conducted out, thereby reducing image sticking by neutralizing both positive and negative charges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If no conductive structure is provided, then the device structure remains simple, but residual charges accumulate inside the panel causing image sticking
Solution Approach 1:
The patent extracts the harmful residual charges from the liquid crystal layer by providing a conductive structure that creates an electric field to guide charges to the edges where they can be safely conducted out, thereby eliminating image sticking while maintaining relatively simple device structure
Solution Approach 2:
The conductive structure acts as an intermediary element between the liquid crystal layer and the external environment, providing a controlled path for residual charges to escape without requiring complex internal modifications to the liquid crystal layer itself
2Reliability
If alternating voltage is applied to eliminate residual charges, then image sticking is reduced, but power consumption increases
Solution Approach 1:
The patent applies periodic alternating voltage to the conductive structure, which periodically shifts the electric field direction to ensure both positive and negative residual charges are guided to the edges and conducted out, effectively eliminating image sticking through rhythmic charge removal cycles
Solution Approach 2:
The patent changes the voltage parameter by applying alternating voltage with specific polarity changes, which dynamically adjusts the electric field direction to accommodate different charge types and maximize charge removal efficiency while controlling power consumption
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 eliminates image sticking by removing residual charges, improving display quality and reducing the adverse effects of parasitic electric fields on liquid crystal molecule deflection.
Implementation Method 1
voltage is applied to the edges of the panel by the driving circuit and the conductive structure, so that residual charges which otherwise gather inside the panel move toward the edges of the panel and are conducted out
Implementation Method 2
as the applied voltage periodically alternates between a positive polarity and a negative polarity, it is possible that both of positive and negative charges move toward the edges of the panel and are conducted out
Data Source
AI summary
According to embodiments of the invention, there are disclosed a liquid crystal display panel and a liquid crystal display device. The liquid crystal display panel comprises: a liquid crystal layer; a conductive structure, surrounding the liquid crystal layer; and a driving circuit, connected to the conductive structure. The driving circuit comprises: a power supply circuit and a switch circuit. The power supply is connected to the conductive structure and provides the conductive structure with a DC voltage. One terminal of the switch circuit is connected to the conductive structure and the other terminal thereof is grounded.