Organic Transparent Electrodes for Bend-Resistant Display Panels
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Solution Overview
Problem
Conventional flexible display panels using indium tin oxide (ITO) transparent electrodes are prone to breaking and separation from alignment layers during bending, affecting stability and durability.
Innovation Solution
Replace ITO electrodes with organic transparent conductive materials, specifically polyimide and nano conductive particles, such as nano metal or metal oxide particles, to enhance bending resistance and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an inorganic ITO film layer is used for transparent electrodes, then electrical conductivity and transparency are achieved, but the electrode is easily broken during bending and crimping, and easily falls off or separates from the alignment layer
Solution Approach 1:
The patent uses a composite transparent electrode structure comprising an ITO film layer and an organic transparent conductive layer. The ITO layer provides base conductivity and transparency, while the organic layer containing conductive polymers and binders enhances flexibility and bending resistance. This composite structure resolves the contradiction by combining the advantages of inorganic materials (conductivity, transparency) with organic materials (flexibility, bendability).
Solution Approach 2:
The patent modifies the physical and chemical parameters of the transparent electrode by controlling the thickness of the ITO layer (50-200 nm) and the organic layer (50-200 nm), and by adjusting the composition ratios of conductive polymers and binders. These parameter changes optimize both the electrical properties and mechanical flexibility, enabling the electrode to maintain stability during bending while achieving required conductivity and transparency.
2Reliability
If an inorganic ITO film layer is used for transparent electrodes, then electrical conductivity is achieved, but the electrode separates from the alignment layer during bending
Solution Approach 1:
The organic transparent conductive layer acts as an intermediate layer between the ITO film and the alignment layer, improving interfacial adhesion. The organic materials in this layer have better compatibility with both the inorganic ITO and the organic alignment layer, preventing separation during bending and crimping operations.
Solution Approach 2:
The organic transparent conductive layer serves as an intermediary between the inorganic ITO film layer and the organic alignment layer. This intermediate layer facilitates better bonding and stress distribution, preventing the ITO film from separating from the alignment layer during flexible deformation.
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
Improves flexibility and prevents electrode breakage and film layer separation, enhancing the overall stability and bending resistance of the display panel.
Implementation Method 1
a material of the first transparent electrode is an organic transparent conductive material; the organic transparent conductive material includes polyimide and a nano conductive particle
Data Source
AI summary
A display panel and a display device are provided. The display panel includes an array substrate and a plurality of first transparent electrodes disposed on the array substrate, and a material of the first transparent electrode is an organic transparent conductive material. The display panel and the display device in the present disclosure can overcome problems that an indium tin oxide transparent electrode in a conventional flexible display device is easily broken and is easily separated from an alignment layer, thereby effectively improving the bending resistance and the stability of a flexible display panel.