OLED Display Surface Stress Enhancing Members Impact Resistance
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Solution Overview
Problem
Conventional OLED displays lack sufficient mechanical strength to absorb external impacts, leading to potential damage when subjected to twisting and bending loads, as they do not have a shock absorption member to mitigate these forces.
Innovation Solution
Incorporating surface stress enhancing members with hard coating layers and pressure-sensitive adhesive layers on both the front and rear surfaces of the panel assembly, along with shock absorption tapes and bezels, to enhance impact resistance and mechanical strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional OLED display structure with only bezel protection is used, then device simplicity is maintained, but mechanical strength against external impact is insufficient
Solution Approach 1:
The patent applies composite materials by combining multiple protective layers with different properties: the hard coating layer provides rigidity and scratch resistance, while the shock absorption layer (sponge or urethane) provides elasticity and impact absorption. This composite structure resolves the contradiction by achieving high mechanical strength through material composition rather than structural complexity
Solution Approach 2:
The protective structure is segmented into distinct functional layers: a hard coating layer for surface protection and a separate shock absorption layer for impact mitigation. This segmentation allows each layer to specialize in its function, achieving comprehensive protection without requiring a single complex structure
2Reliability
If shock absorption member is added to absorb external impact, then impact resistance is improved, but device complexity increases
Solution Approach 1:
The patent merges the protective function into the existing bezel structure by integrating the shock absorption layer within the bezel assembly. This combining approach adds impact resistance while minimizing structural complexity, as the protective layers are incorporated into the existing framework rather than adding separate components
Solution Approach 2:
The shock absorption layer is positioned beforehand between the panel assembly and external environment to cushion against potential impacts. This preventive measure absorbs external forces before they reach the fragile OLED panel, improving reliability without requiring complex active protection systems
3Strength
If hard coating layer with pressure sensitive adhesive layer is applied, then surface stress resistance is enhanced, but manufacturing complexity increases
Solution Approach 1:
The patent utilizes parameter changes by selecting materials with specific properties: the pressure sensitive adhesive layer is chosen for its ability to bond effectively under pressing conditions, and the hard coating layer is selected for its high surface stress resistance. These material parameter selections enable enhanced protection while maintaining manufacturing feasibility through standard adhesive bonding processes
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 significantly increases the impact resistance of the OLED display, preventing damage from external impacts and enhancing the mechanical strength, as demonstrated by improved drop impact resistance test results.
Implementation Method 1
The shock absorption layer may include a sponge or urethane
Implementation Method 2
Each of the first and second surface stress enhancing members may include a hard coating layer and a pressure sensitive adhesive layer arranged on a surface of the hard coating layer
Data Source
AI summary
An organic light emitting diode display includes a panel assembly for displaying an image and a first surface stress enhancing member arranged on a rear surface of the panel assembly. In one embodiment, the organic light emitting diode display includes a second surface stress enhancing member arranged on a front surface of the panel assembly. In anther embodiment, the organic light emitting diode display includes a lower bezel arranged on a rear surface of the first surface stress enhancing member and a shock absorption tape arranged between the first surface stress enhancing member and the lower bezel. The structure of the organic light emitting diode display efficiently prevents damages caused by an external impact.