Composite Bending Support Layer for Flexible Display Panels
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Solution Overview
Problem
Current flexible and bendable display panels are overly thick due to the combination of a stainless steel support layer and a copper foil heat dissipation layer, which hinders thinning and affects bending and recovery characteristics.
Innovation Solution
A composite bending support layer comprising a first metal layer with higher hardness, primarily stainless steel, and a second metal layer with lower hardness, such as copper foil, where the second metal layer fills damascene areas in the non-bending regions, allowing for integration and reduced thickness, while maintaining improved bending and recovery abilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a stainless steel support layer and copper foil heat dissipation layer are stacked to improve bending characteristics and heat dissipation, then bending and recovery characteristics are enhanced and heat dissipation is improved, but the overall thickness of the display panel increases significantly
Solution Approach 1:
The patent merges the stainless steel support layer and copper foil heat dissipation layer into a single integrated composite layer. The copper foil is embedded within the stainless steel layer, creating a unified structure that simultaneously provides bending support and heat dissipation functions without the need for separate stacked layers, thereby reducing overall panel thickness.
Solution Approach 2:
The copper foil heat dissipation layer is nested within the stainless steel support layer. This nesting arrangement allows the copper foil to be embedded in the interior of the stainless steel layer, enabling the heat dissipation function to be incorporated within the structural support layer rather than adding it as a separate external layer.
2Strength
If the stainless steel support layer is made thicker to improve bending and recovery characteristics, then the panel's flexibility and shape recovery are enhanced, but the panel thickness increases and thinning becomes difficult
Solution Approach 1:
The patent creates a composite material structure by integrating copper foil within the stainless steel layer. This composite approach allows the stainless steel to provide the necessary mechanical strength for bending and recovery, while the embedded copper foil contributes to heat dissipation and structural reinforcement, achieving enhanced mechanical properties without proportionally increasing thickness.
3Temperature
If a separate copper foil heat dissipation layer is added below the stainless steel layer to improve heat dissipation and electromagnetic shielding, then thermal management and EMI shielding are enhanced, but the panel thickness increases
Solution Approach 1:
The patent merges the heat dissipation function into the structural support layer by embedding copper foil within the stainless steel layer. This integration allows the same layer to serve dual purposes: providing mechanical support for bending recovery and facilitating heat dissipation, thereby eliminating the need for a separate external heat dissipation layer.
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 the overall thickness of the display panel, enhances bending and recovery performance, and maintains effective heat dissipation through the use of copper foil in non-bending areas, thereby improving the panel's structural integrity and longevity.
Implementation Method 1
the first metal layer, at least located in the bending area of the display panel, includes a damascene area located in the non-bending area; the second metal layer, located in the non-bending area of the display panel, fills the damascene area
Data Source
AI summary
The present application proposes a display panel and a display device. The display panel includes a panel body and a composite bending support layer, and the composite bending support layer includes a first metal layer and a second metal layer; wherein, the first metal layer, at least located in the bending area of the display panel, includes a damascene area located in the non-bending area; the second metal layer, located in the non-bending area of the display panel, fills the damascene area; the material hardness of the first metal layer is greater than the material hardness of the second metal layer.