OLED Cover Layer Corner-Cube Pattern Anti-Reflection
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Solution Overview
Problem
OLED displays suffer from reduced visibility in bright environments due to external light reflection from metal wires, which affects black color expression and contrast.
Innovation Solution
A cover layer with a corner-cube pattern is integrated over the OLED, reflecting external light in a parallel manner to minimize reflection and enhance visibility, while also protecting the OLED structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conventional flat cover layer is used, then the manufacturing process is simple, but external light reflection from metal wires deteriorates visibility
Solution Approach 1:
The cover layer surface is transformed from a flat two-dimensional plane to a three-dimensional structure with corner-cube patterns. These patterns create multiple reflection surfaces oriented at different angles, causing incident light to reflect in multiple directions rather than uniformly, thereby reducing the intensity of reflected light reaching the viewer's eye.
Solution Approach 2:
The cover layer surface is divided into multiple corner-cube pattern elements, each acting as an independent light scattering unit. This segmentation breaks up the uniform reflection that would occur on a flat surface, distributing reflected light across different angles and reducing overall visibility of reflections.
2Object-affected harmful factors
If additional light suppression elements are added to reduce reflection, then visibility improves, but device complexity and thickness increase
Solution Approach 1:
The cover layer is designed to perform multiple functions simultaneously: it provides the necessary protective coverage for the OLED structure, maintains optical transparency for display visibility, and incorporates anti-reflection functionality through its corner-cube pattern surface structure. This eliminates the need for separate light suppression elements.
Solution Approach 2:
The anti-reflection function is merged into the cover layer itself rather than being implemented as a separate component. The corner-cube pattern is integrated directly into the cover layer structure, combining protection, transparency, and light suppression functions in a single element.
3Object-affected harmful factors
If additional light suppression elements are added to reduce reflection, then visibility improves, but the thickness of the display increases
Solution Approach 1:
The cover layer serves multiple purposes including protection, transparency, and anti-reflection, eliminating the need for additional thickness-consuming components dedicated solely to light suppression.
Solution Approach 2:
The corner-cube pattern is implemented as a surface structure on the thin cover layer rather than a bulky three-dimensional component. This allows the anti-reflection function to be achieved within the existing thickness constraints of the cover layer itself.
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 corner-cube pattern effectively suppresses external light reflection, improving visibility and maintaining the slim thickness of the OLED display without the need for additional light suppression elements.
Implementation Method 1
The corner-cube pattern effectively suppresses external light reflection
Data Source
AI summary
The present invention relates to an OLED display, and an OLED display according to an exemplary embodiment of the present invention includes a substrate member, an OLED including a first electrode formed on the substrate member, an organic emission layer formed on the first electrode, and a second electrode formed on the organic emission layer, and a cover layer formed on the second electrode and covering the OLED. The cover layer includes a cover main body and a corner-cube pattern formed on an opposite side of a side that faces the second electrode among both sides of the cover main body.