Display Panel Alignment Layer Charge Dissipation via Common Electrode
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Solution Overview
Problem
Display panels experience image sticking due to electrostatic charge remaining on the alignment layer, which is not effectively conducted away by the pixel electrode since the thin-film transistor is in a turn-on state for a short time.
Innovation Solution
Incorporating at least one through hole in the insulation layer allows the alignment layer to contact the common electrode, ensuring that electrostatic charge is conducted away even when the thin-film transistor is in a turn-on state, thereby reducing image sticking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pixel electrode is used to conduct away charge from the alignment layer, then charge conduction is achieved, but the thin-film transistor being in turn-on state for an extremely short time prevents effective charge conduction, resulting in image sticking
Solution Approach 1:
The patent introduces a first through hole as an intermediary pathway that allows the alignment layer to directly contact the common electrode, bypassing the pixel electrode's limited conduction capability. This mediator enables continuous charge dissipation from the alignment layer to the common electrode, resolving the image sticking problem caused by insufficient charge conduction through the pixel electrode alone.
Solution Approach 2:
The patent segments the charge conduction pathway by creating a separate conduction channel through the first through hole, independent from the pixel electrode's conduction path. This segmentation allows the common electrode to directly receive and dissipate charge from the alignment layer, complementing the pixel electrode's function and ensuring continuous charge removal even when the thin-film transistor is in turn-on state for a short duration.
2Object-generated harmful factors
If the alignment layer contacts only with the pixel electrode and insulation layer, then the structure is simple, but charge cannot be effectively conducted away, causing image sticking
Solution Approach 1:
The first through hole serves as a structural intermediary that enables the alignment layer to contact the common electrode without adding complex intermediate layers or structures. This simple through-hole design provides an additional charge conduction pathway while maintaining structural simplicity, allowing the alignment layer to dissipate charge effectively without increasing device complexity.
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 effectively reduces electrostatic charge on the alignment layer, improving display quality by maintaining the common electrode in a conductive state and enhancing the display panel's performance.
Implementation Method 1
the common electrode is always in a conductive state, so that the electrostatic charge remaining on the alignment layer can be conducted away by the common electrode
Data Source
AI summary
A display panel and a display device, the display panel includes an array substrate; wherein the array substrate includes a common electrode, a first insulation layer, a plurality of pixel electrodes and an alignment layer; the common electrode, first insulation layer, plurality of pixel electrodes and alignment layer are successively arranged; at least one first through hole is defined in the first insulation layer, and the alignment layer contacts with the common electrode via the at least one first through hole. By arranging in such a manner, although a thin-film transistor stays in a turn-on state for an extremely short time, however, since the common electrode is always in a conductive state, so that the electrostatic charge remaining on the alignment layer can be conducted away by the common electrode, thereby reducing the electrostatic charge remaining on the alignment layer, and thus improving display quality of display panel.