Display Device Buffer System with Density Gradient
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Solution Overview
Problem
Conventional display devices face challenges in effectively buffering impact and stress, leading to potential damage and defects, particularly due to bending deformation and compression/tensile deformations caused by external forces.
Innovation Solution
A display device is designed with a buffer system comprising a bending deformation buffer layer and a compression/tensile deformation buffer layer, each with specific densities and thicknesses, made of materials like polystyrene or polyolefin, to absorb and distribute impact, and a support film and adhesive layer for enhanced protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single buffer member is used to protect the display panel, then the structure is simple, but the buffering effectiveness against different types of deformation is insufficient
Solution Approach 1:
The buffer member is divided into multiple layers with different densities. The first buffer member has a first density and the second buffer member has a second density that is less than the first density. Each layer is optimized to buffer specific types of deformation: the higher density layer buffers bending deformation while the lower density layer buffers compression and tensile deformation, achieving comprehensive protection without requiring completely separate buffer structures.
Solution Approach 2:
The buffer system uses composite material structure with multiple layers of different densities. The first buffer member uses a higher density material (0.7-0.9 g/cm³) and the second buffer member uses a lower density material (0.3-0.5 g/cm³). This composite approach allows each material to be optimized for its specific buffering function while working together to provide comprehensive impact protection.
2Reliability
If uniform density buffer member is used, then the manufacturing is simple, but the buffering performance for different deformation types is not optimized
Solution Approach 1:
Different regions of the buffer system have different densities optimized for their specific functions. The first buffer member with higher density (0.7-0.9 g/cm³) is positioned to handle bending deformation, while the second buffer member with lower density (0.3-0.5 g/cm³) is positioned to handle compression and tensile deformation. This local optimization of material properties enhances overall buffering performance while maintaining a relatively simple layered manufacturing approach.
3Reliability
If thicker buffer member is used to improve impact buffering, then the protection is enhanced, but the overall device thickness and weight increase
Solution Approach 1:
The buffer system uses parameter optimization by controlling the thickness and density of each layer. The first buffer member has a thickness of 60-150 μm with density 0.7-0.9 g/cm³, and the second buffer member has a thickness of 60-150 μm with density 0.3-0.5 g/cm³. This parameter optimization allows effective impact buffering while minimizing the total thickness and weight of the buffer system compared to using a single thicker uniform buffer.
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 buffer system effectively reduces the risk of defects by absorbing and scattering external impacts, maintaining the display panel's integrity and display quality against various types of forces.
Implementation Method 1
the first member and the second member may be buffer members that buffer impact applied to the display panel
Data Source
AI summary
A display device including a display panel that displays an image at a first surface thereof; a first member on a second surface of the display panel, the first member having a first density; and a second member between the display panel and the first member, the second member having a second density that is less than the first density.