Liquid Crystal Display Panel with Auxiliary Electrode for Ion Management
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Solution Overview
Problem
Impurity ions in liquid crystal display panels generate a bias electric field, affecting image display quality and causing afterimages due to accumulation on substrates during manufacturing.
Innovation Solution
A liquid crystal display panel design with sub-pixel regions, including main and auxiliary pixel regions, where the second pixel electrode drives impurity ions to gather on a shielding layer, preventing bias electric fields and improving display quality by using specific voltage waveforms and shielding layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If impurity ions are present in the liquid crystal layer during manufacturing, then the liquid crystal display panel can be produced, but impurity ions accumulate on substrates generating bias electric fields that degrade image display quality
Solution Approach 1:
The pixel electrode is divided into a first pixel electrode and a second pixel electrode. The first pixel electrode is used for normal image display, while the second pixel electrode is specifically configured to drive impurity ions to gather on the first substrate. This segmentation allows the display function and ion collection function to be separated, resolving the contradiction between manufacturing ease and display quality.
Solution Approach 2:
The second pixel electrode acts as an intermediary component that mediates between the impurity ions in the liquid crystal layer and the first substrate. By applying specific voltage waveforms to the second pixel electrode, impurity ions are guided to gather on the first substrate through this intermediary structure, preventing bias electric field formation without affecting the main display function.
2Reliability
If a second pixel electrode is added to drive impurity ions, then image display quality is improved, but device complexity increases
Solution Approach 1:
The second pixel electrode is designed with multi-functionality: it can be driven by specific voltage waveforms to collect impurity ions, and it can also be driven by normal image display voltage waveforms to participate in image display. This universality allows the same component to serve both ion collection and display functions, reducing the need for additional dedicated structures and mitigating the increase in device complexity.
Solution Approach 2:
The patent utilizes parameter changes in the voltage waveform applied to the second pixel electrode to control its function. By adjusting voltage parameters (amplitude, duration, timing), the second pixel electrode can switch between ion collection mode and normal display mode, enabling a single structure to perform multiple functions without increasing physical complexity.
3Ease of manufacture
If impurity ions accumulate on substrates, then manufacturing is simplified, but bias electric fields cause afterimages and poor display effects
Solution Approach 1:
The patent converts the harmful effect of impurity ions into a beneficial outcome. Instead of attempting to completely eliminate impurity ions during manufacturing, the second pixel electrode is designed to actively drive and gather these ions on the first substrate. By controlling ion accumulation through voltage waveforms, the harmful bias electric field is prevented from forming in the display region, transforming the manufacturing simplicity advantage into a controlled ion management system that maintains display quality.
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 prevents impurity ion accumulation on main pixel regions, enhancing image display quality and preventing light leakage, resulting in improved display effects without bias electric field interference.
Implementation Method 1
the second pixel electrode is configured for driving a plurality of impurity ions in the liquid crystal layer to gather at a position on the first substrate and/or the second substrate corresponding to the auxiliary pixel region
Data Source
AI summary
A liquid crystal display panel and a driving method thereof are provided. In the liquid crystal display panel provided by embodiments of the present application, a first pixel electrode is configured for an image display in a main pixel region, and a second pixel electrode is configured for driving impurity ions in the liquid crystal layer to gather on a position of the first substrate and/or the second substrate corresponding to an auxiliary pixel region. The liquid crystal display panel is not affected by a bias electric field generated by an accumulation of the impurity ions which affects the image display, and has a display effect that is relatively better.