Display Backplane Conductive Pattern Segmentation for Afterimage Control
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Solution Overview
Problem
Existing display devices, particularly organic light emitting display devices, face issues with defects such as stains and afterimages, which affect their performance and efficiency.
Innovation Solution
The display device incorporates a design with a first and second lower conductive pattern on a substrate, where each pattern is electrically isolated and applies different voltages, improving the efficiency and reducing defects like stains and afterimages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional single lower conductive layer is used, then the device structure is simple, but defects such as stains and afterimages occur due to insufficient voltage control
Solution Approach 1:
The lower conductive layer is divided into multiple electrically isolated conductive patterns (first lower conductive pattern and second lower conductive pattern), each capable of receiving different voltages independently. This segmentation allows for improved voltage control over different regions of the display device, reducing defects such as stains and afterimages while maintaining a relatively simple overall structure.
2Productivity
If different voltages are applied to different lower conductive patterns, then step efficiency is improved, but the electrical isolation and voltage control complexity increases
Solution Approach 1:
The lower conductive layer is segmented into multiple electrically isolated patterns that can be controlled independently, enabling improved step efficiency through differential voltage application without requiring a completely new control architecture.
Solution Approach 2:
Different voltage levels are applied to different lower conductive patterns based on their specific functional requirements and position in the display device, optimizing performance locally while maintaining overall system efficiency.
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 design enhances the operational efficiency of the display device by minimizing defects, thereby improving the overall performance and image quality.
Implementation Method 1
prone to defects such as stains and afterimages due to polarization phenomena
Data Source
AI summary
A display device is provided. The display device includes substrate, a lower conductive layer disposed on the substrate, and including a first lower conductive pattern and a second lower conductive pattern electrically isolated from each other, a first semiconductor layer including a first channel region, and a first source disposed on one side of the first channel region and a first drain region disposed on the other side of the first channel region. The first lower conductive pattern overlaps the first channel region and the first source region, and the second lower conductive pattern overlaps the first channel region and the first drain region in a plan view, and different voltages are applied to the first lower conductive pattern and the second lower conductive pattern.