Array Substrate Discharge Structure for LCD Image Retention
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Solution Overview
Problem
Liquid crystal display panels experience image retention due to residual charge accumulation on pixel electrodes, which cannot be quickly dissipated, affecting display quality.
Innovation Solution
An array substrate with an electrically actuated component that deforms to contact pixel and common/ground electrodes, shorting them and releasing residual charge when the power is turned off, utilizing a conductive layer with a high thermal expansion material to facilitate this deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If charge accumulates on pixel electrode during normal operation, then the pixel electrode maintains its charge for display function, but image retention occurs after shutdown affecting display quality
Solution Approach 1:
The patent introduces a discharge electrode and discharge layer that are pre-positioned and connected to the common electrode, ready to immediately discharge residual charge from the pixel electrode when shutdown occurs. This preliminary arrangement of discharge components eliminates the need for complex active control systems while reliably preventing image retention.
2Object-generated harmful factors
If a conductive layer is added to short pixel electrode and common electrode for charge release, then image retention is reduced, but device complexity increases
Solution Approach 1:
The patent employs a thin film discharge layer made of conductive material that can flexibly contact the pixel electrode and common electrode during deformation of the electrically actuated component. This thin film approach achieves the shorting function without requiring bulky or complex mechanical structures, thereby reducing overall device complexity while maintaining effective charge discharge capability.
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
Quickly releases residual charge on pixel electrodes, reducing image retention and enhancing display quality by ensuring a short circuit between electrodes when the electrically actuated component changes from an energized to a de-energized state.
Implementation Method 1
a coefficient of thermal expansion of the second material layer is greater than a coefficient of thermal expansion of the first material layer
Data Source
AI summary
Provided are an array substrate and a display panel. The array substrate includes: a base and first leads and second leads disposed in a non-display area on the base, the first leads are electrically connected to pixel electrodes, the second leads are electrically connected to a common electrode or to a ground electrode, the array substrate further includes an electrically actuated component, a bottom surface of which is conductive. After the electrically actuated component changes from an energized state to a de-energized state, the bottom surface is deformed and contacts at least part of the first leads and at least part of the second leads. The pixel electrodes and the common electrode or the ground electrode are shorted as the bottom surface of the electrically actuated component contacts the first leads and the second leads, to release residual charge on the pixel electrode.