Display Panel Transparent Conductive Pattern Bending Reduction
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Solution Overview
Problem
Liquid crystal display panels face bending issues due to contraction of polarizing layers, which can lead to mechanical stress and reliability concerns, especially as they are developed to be thinner and lighter.
Innovation Solution
Incorporating a first transparent conductive pattern with extending portions and openings on one substrate and a polarizing member with a drawn polarizing layer, along with a second transparent conductive pattern and polarizing member on the opposing substrate, to reduce bending stress and facilitate static electricity discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a polarizing layer is formed through drawing to polarize light, then the liquid crystal display panel can polarize light effectively, but the polarizing layer contracts and causes bending of the display panel
Solution Approach 1:
The patent divides the transparent conductive layer into multiple isolated conductive patterns instead of a continuous layer. These segmented patterns are distributed across the substrate and do not form a complete closed loop, which prevents the formation of large-scale stress accumulation zones while maintaining electrical conductivity and static discharge functionality.
Solution Approach 2:
The patent introduces openings in the transparent conductive layer at specific locations where the polarizing layer is drawn. This creates local variations in the structure - areas with openings that allow stress relief and areas without openings that maintain conductivity. The local modification of the conductive layer structure addresses the bending issue without compromising overall functionality.
2Length of moving object
If the liquid crystal display panel is made thinner to reduce thickness, then the display device becomes more compact and lightweight, but bending of the display panel is more deteriorated
Solution Approach 1:
By segmenting the transparent conductive layer into isolated patterns with openings, the patent reduces the continuous stress transmission path that would otherwise cause bending in thin panels. The segmented structure allows the thin panel to maintain its shape better while still providing the necessary electrical functions.
Solution Approach 2:
The openings in the transparent conductive layer act as intermediary stress-relief zones between the polarizing layer and the substrate. These openings allow the contracted polarizing layer to exert less force on the thin substrate, preventing bending while maintaining the panel's thin profile.
3Reliability
If a continuous transparent conductive layer is used to discharge static electricity, then static electricity can be effectively discharged, but the conductive layer may form closed loops that exacerbate bending issues
Solution Approach 1:
The patent segments the transparent conductive layer into multiple isolated patterns that are distributed across the substrate. These segmented patterns provide multiple discharge paths for static electricity without forming a single continuous closed loop, thereby maintaining electrical functionality while reducing bending stress.
Solution Approach 2:
Instead of using a continuous conductive layer that forms closed loops (which causes bending), the patent inverts the approach by using isolated conductive patterns with openings. This inverted structure achieves the same static discharge function while eliminating the bending problem associated with continuous loops.
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 reduces bending of the display panel and improves reliability by discharging static electricity, thereby enhancing the stability and performance of the liquid crystal display device.
Implementation Method 1
a polarizing plate to polarize a light provided from the backlight assembly and a light exits from the liquid crystal display panel
Implementation Method 2
the liquid crystal display panel may be bent due to contraction of the polarizing layer
Implementation Method 3
improving reliability by discharging static electricity
Data Source
AI summary
A display panel includes a first substrate, a second substrate facing the first substrate, a liquid crystal layer interposed between the first substrate and the second substrate, a first transparent conductive pattern disposed on a surface of the first substrate and including a plurality of openings, and a first polarizing member combined with the first transparent conductive pattern. The display panel may reduce bending due to contraction of the first polarizing member including a drawn polarizing layer. Furthermore, static electricity generated in the second substrate may be discharged thereby improving reliability of a display device including the display panel.