OLED Mirror Reflection Member Design
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Solution Overview
Problem
Organic light emitting display apparatuses are prone to damage from external foreign materials like moisture and oxygen, and they lack functionality as a mirror when not emitting light.
Innovation Solution
Incorporating a reflection member made of materials like aluminum, with a thickness of 250 Å or more, on a non-light emitting region of the display apparatus, which can reflect external light and function as a mirror when the organic light emitting device is not generating light, while a sealing member ensures protection from external materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a reflection member is added to enable mirror functionality, then the device can function as both display and mirror, but the device complexity increases
Solution Approach 1:
The reflection member is integrated into the display apparatus structure to enable dual functionality. The same component serves both as a protective layer and as a mirror surface when the display is off, allowing one device to perform multiple functions without requiring separate mirror and display units.
Solution Approach 2:
The reflection member is combined with the sealing structure of the display apparatus. By merging the mirror function with the existing protective sealing layers, the patent avoids adding a completely separate mirror component, thereby reducing overall structural complexity while achieving dual functionality.
2Adaptability or versatility
If the reflection member is placed on the non-light emitting region, then mirror functionality is achieved, but light leakage may occur from the light emitting region
Solution Approach 1:
The reflection member is selectively positioned only on the non-light emitting region of the display apparatus. This localized placement ensures that the mirror function is provided where needed while leaving the light emitting region transparent, thus preventing light leakage while maintaining mirror functionality in the appropriate area.
3Reliability
If the organic light emitting display apparatus is sealed to prevent foreign material penetration, then reliability improves, but the device complexity increases
Solution Approach 1:
The sealing member is designed to serve dual purposes: it provides the necessary sealing to protect the organic light emitting device from moisture and oxygen penetration, while simultaneously serving as the reflection member for mirror functionality. This multi-functional design achieves reliable protection without adding separate sealing components.
Solution Approach 2:
The sealing function and mirror reflection function are merged into a single integrated component. By combining these functions, the patent reduces the number of separate components needed, thereby improving reliability through better sealing while minimizing the increase in device complexity.
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 allows the organic light emitting display apparatus to function both as a display and a mirror, enhancing its protective sealing and optical performance by preventing light leakage and ensuring reflectivity when not in use.
Implementation Method 1
The reflection member may be formed of a material that reflects light proceeding towards the reflection member from outside of the organic light emitting display apparatus
Implementation Method 2
generate light by re-combination of electrons and holes in a light emitting layer when a voltage is applied to an organic film
Data Source
AI summary
An organic light emitting display apparatus includes a substrate and a sealing member that are separated from each other; a pixel electrode on the substrate; a pixel defining layer on the pixel electrode and exposing a portion of the pixel electrode; an intermediate layer including a light emitting layer on the exposed portion of the pixel electrode; a facing electrode on the pixel defining layer and the intermediate layer; and a reflection member on a surface of the sealing member facing the substrate and patterned to have an opening portion that exposes the pixel electrode, wherein the opening portion is formed such that a boundary portion of the opening portion is closer to a center of the intermediate layer than a boundary portion of the portion of the pixel electrode exposed by the pixel defining layer.