Transparent Organic Light-Emitting Device Area Efficiency
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Solution Overview
Problem
Light-emitting devices using organic electroluminescence (EL) face a decrease in area efficiency due to the need for optical transparency, which is not effectively addressed by existing designs that compromise on light-emitting unit formation in transparent regions.
Innovation Solution
A light-emitting device configuration featuring a substrate with alternating light-emitting and non-light-emitting regions, where the non-light-emitting regions transmit visible light and do not contain light-emitting units, allowing for improved optical transparency while maintaining efficient light emission through the use of transparent electrodes and organic layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a region transmitting light from the outside is provided in the light-emitting device to achieve optical transparency, then optical transparency is improved, but area efficiency decreases
Solution Approach 1:
The light-emitting device is segmented into multiple light-emitting units arranged in a matrix pattern, with transparent regions positioned between them. This segmentation allows the device to simultaneously provide optical transparency through the transparent regions and maintain light-emitting functionality through the distributed light-emitting units, resolving the contradiction between transparency and area efficiency
Solution Approach 2:
Different regions of the light-emitting device are assigned different functions: light-emitting units are concentrated in specific areas to provide illumination, while transparent regions are positioned in other areas to allow light transmission. This local differentiation of quality allows the device to achieve both optical transparency and acceptable area efficiency by optimizing the spatial distribution of functional regions
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 configuration enhances area efficiency by allowing for wider non-light-emitting regions and optimized light-emitting unit dimensions, maintaining optical transparency and luminance while preventing a decrease in light-emitting area efficiency.
Implementation Method 1
light-emitting devices using organic electroluminescence (EL)
Implementation Method 2
a substrate transmitting visible light; the non-light-emitting region transmits visible light
Data Source
AI summary
A substrate (100) transmits visible light. Plural light-emitting regions (142) are located on the substrate (100) and are aligned in a first direction. A non-light-emitting region (144) is provided in each area between the plural light-emitting regions (142) and transmits visible light. Moreover, the light-emitting region (142) includes plural light-emitting units (140). The light-emitting units (140) are aligned in the first direction. In addition, each light-emitting unit (140) includes a first electrode (110), an organic layer (120), and a second electrode (130). The organic layer (120) is formed between the first electrode (110) and the second electrode (130).