LCD Panel Light Shielding Electrodes Suppress Line Residue
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Solution Overview
Problem
Current LCD panels suffer from line residue issues due to lateral ion movement at the junctions of black and white checkerboards, leading to decreased display quality over time.
Innovation Solution
A display panel design featuring a first substrate with pixel electrodes and light shielding electrodes, connected to a binding terminal providing a preset voltage, and a common electrode on the second substrate with strategically placed openings to create a vertical electric field that hinders the lateral movement of ions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the pixel size is reduced to achieve high resolution, then the resolution is improved, but the electric field density increases causing line residue
Solution Approach 1:
The patent introduces light shielding electrodes as intermediary elements positioned between adjacent pixel electrodes. These light shielding electrodes act as mediators that generate local electric fields to counteract the harmful lateral ion movement caused by high electric field density, thereby eliminating line residue while preserving high resolution
Solution Approach 2:
The patent applies local quality by positioning light shielding electrodes specifically at the boundaries between pixel electrodes where line residue occurs. The light shielding electrodes are configured with specific dimensions and spacing to locally counteract the electric field density issues without affecting the overall display performance
2Measurement precision
If the pixel size is reduced to achieve high resolution, then the resolution is improved, but the image sticking performance deteriorates
Solution Approach 1:
The light shielding electrodes serve as intermediary elements that generate local electric fields to prevent ion migration. This mediator approach addresses both line residue and image sticking issues simultaneously by stabilizing the electric field distribution in the high-density pixel regions
Solution Approach 2:
The patent applies preliminary anti-action by pre-positioning light shielding electrodes to counteract the electric field density problems before they cause image sticking or line residue. The light shielding electrodes are configured in advance to generate opposing electric fields that prevent harmful ion movement
3Object-affected harmful factors
If light shielding electrodes are added to prevent line residue, then the line residue is reduced, but the device complexity increases
Solution Approach 1:
The patent merges the light shielding electrode function with the existing pixel electrode structure. The light shielding electrodes are integrated into the same layer as the pixel electrodes and share the same manufacturing process, thereby reducing the actual increase in device complexity while achieving line residue elimination
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 vertical electric field effectively reduces line residue and enhances display quality by preventing ion migration, thereby improving the reliability of LCD panels.
Implementation Method 1
the binding terminal is configured to provide a preset voltage to the plurality of light shielding electrodes to form electric field between the common electrode and the corresponding light-shielding electrode
Data Source
AI summary
The present application discloses a display panel and a display device. The display panel includes a plurality of pixel electrodes and a common electrode arranged correspondingly, and a plurality of light shielding electrodes, by opening holes on the common electrode corresponding to the light-shielding electrode or adjust a preset voltage on the light-shielding electrode, a vertical electric field is formed between the common electrode and the corresponding light-shielding electrode, which hinders a lateral movement of impurity ions and relieves a problem of line residue of currently LCD panels.