Flexible OLED Display Substrate Removal for Slim Profile and Anti-Reflection
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Solution Overview
Problem
Conventional organic light emitting display devices with attached touch panels face challenges in achieving a slim profile and flexibility due to the thickness of hard materials like glass used in substrates, which hinder manufacturing efficiency and visibility issues from reflected external light.
Innovation Solution
The solution involves removing the plastic or glass support substrate after forming the touch electrode array and using a thin separation layer, barrier layer, and circular polarizing plate to reduce the device's thickness and prevent light reflection, thereby enhancing flexibility and visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If hard materials like glass are used for substrates to ensure structural strength, then the device achieves sufficient mechanical strength, but the device thickness increases and flexibility is reduced
Solution Approach 1:
The patent replaces traditional hard glass substrates with flexible plastic substrates (first and second plastic base substrates) that have optical compensating properties. These thin film substrates provide the necessary mechanical support while enabling device flexibility and reducing overall thickness, directly resolving the contradiction between structural strength and device thinness.
Solution Approach 2:
The patent changes the material parameters of the substrates from hard glass to flexible plastic with specific optical properties. The plastic substrates are designed with specific birefringence characteristics that compensate for optical defects, allowing the device to achieve both thinness and structural adequacy through parameter optimization rather than relying on thick hard materials.
2Ease of manufacture
If traditional plastic substrates are used for the touch panel, then ease of fabrication is improved, but reflected external light causes visibility issues
Solution Approach 1:
The patent applies local quality by endowing the plastic substrates with specific optical compensating properties. The first and second plastic base substrates are designed with specific birefringence characteristics that locally compensate for the harmful light reflection effects, allowing the material to simultaneously maintain ease of fabrication while eliminating visibility issues through localized optical property optimization.
Solution Approach 2:
The patent converts the harmful effect of light reflection from plastic substrates into a beneficial effect by carefully controlling their optical properties. The plastic substrates' natural birefringence, which could cause display defects, is instead utilized to compensate for and eliminate reflected external light, transforming a potential harm into a solution that improves visibility while maintaining manufacturing ease.
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
This approach results in a thinner, more flexible organic light emitting display device with improved visibility by minimizing the impact of reflected external light, achieved through the strategic use of thin layers and the removal of unnecessary substrate materials.
Implementation Method 1
a circular polarizing plate... to reduce or prevent visibility of reflected external light
Data Source
AI summary
An organic light emitting display device realizes slimness, having flexibility, and effectively reducing or preventing visibility of reflected external light, which includes an organic light emitting panel, a first adhesive layer on the organic light emitting panel, a touch electrode array being in contact with the first adhesive layer, a separation layer on the touch electrode array, and a cover film on the separation layer.