Transparent OLED Reflective Electrode Luminance Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing transparent OLED devices face issues with inconsistent luminance and inability to individually adjust the luminance of their light-emitting surfaces due to the use of transparent conductive layers for both anode and cathode.
Innovation Solution
A transparent OLED device design featuring a reflective electrode between the organic functional layer and one of the transparent electrodes, with an insulating layer to prevent short circuits, allowing for adjustable luminance and double-sided light emission by controlling the electrodes' power supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If both anode and cathode are prepared by transparent conductive layer, then transparent display is achieved, but luminance of two light-emitting surfaces becomes inconsistent and cannot be individually adjusted
Solution Approach 1:
The patent segments the electrode structure by introducing a reflective electrode on one side of the organic functional layer, dividing the single transparent electrode system into two independent electrode systems (transparent electrode + reflective electrode combination). This segmentation enables independent control of light emission from each surface, resolving the luminance adjustment issue while maintaining transparency.
Solution Approach 2:
The patent applies different electrode configurations to different sides of the device: one side uses a transparent conductive layer for transparency, while the other side combines a reflective electrode with a transparent electrode for enhanced light emission control. This local differentiation allows each surface to have optimized properties for its specific function.
2Manufacturing precision
If reflective electrode area is reduced to 10%-50% of organic functional layer area, then luminance consistency is improved, but device complexity increases
Solution Approach 1:
The patent optimizes the reflective electrode area parameter to 10%-50% of the organic functional layer area. This parameter optimization achieves luminance consistency between the two light-emitting surfaces by balancing the light reflection and transmission, resolving the luminance inconsistency issue while keeping the structure manageable.
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
Enables consistent or differential luminance adjustment on both sides of the OLED device, enhancing display capabilities and flexibility in transparent illumination and display applications.
Implementation Method 1
a reflective electrode being disposed on one side of the organic functional layer
Implementation Method 2
both the anode and the cathode of the OLED device are prepared by using a transparent conductive layer
Implementation Method 3
OLED devices are active light-emitting devices
Data Source
Figure 1~2
Figure 3
AI summary
The present invention discloses a transparent OLED device, which comprises a plurality of pixels, each pixel comprising an organic functional layer, a first transparent electrode and a second transparent electrode being disposed on both sides of the organic functional layer, a reflective electrode being disposed on one side of the organic functional layer, the area of the reflective electrode being less than that of the organic functional layer. With regard to the transparent OLED device, by providing a reflective electrode, a combination of a light-emitting device over a microdomain is combined with a transparent light-emitting device, such that the luminance on both sides of a transparent OLED device can be respectively adjusted to be the same or different as required. The present invention can be applied to the field of transparent illumination or display.