Transparent OLED Display With Segmented Emissive Regions
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Solution Overview
Problem
Conventional OLED displays face challenges in achieving high transparency while emitting light primarily through a single surface, as they often require complex and costly constructions that compromise on overall transparency and thickness.
Innovation Solution
The development of OLED devices with emissive and locally-transparent regions, allowing for an overall transparency of at least 5%, where emissive regions are configured to emit light through one surface and transparent regions enable light transmission, while maintaining a flexible and cost-effective fabrication on plastic substrates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional OLED displays use complex constructions to emit light through one surface, then light emission directionality is improved, but device transparency deteriorates
Solution Approach 1:
The OLED display is segmented into multiple pixel types: first pixels configured to emit light primarily through the first surface, and second pixels configured to transmit light through both surfaces. This segmentation allows different regions to serve different functions, achieving overall device transparency while maintaining directed light emission in display regions.
Solution Approach 2:
Different regions of the OLED display are assigned different optical properties: display regions have structures optimized for unidirectional light emission, while transparent regions maintain high transparency. This local differentiation allows the device to achieve both directed light emission where needed and transparency where required.
2Ease of operation
If conventional OLED displays use complex constructions to emit light through one surface, then light emission directionality is improved, but device complexity increases
Solution Approach 1:
The display is divided into functional segments (first pixels and second pixels) with different optical configurations. This segmentation enables directed light emission in display areas while maintaining simplicity and transparency in non-display areas, avoiding the need for complex constructions across the entire device.
Solution Approach 2:
The OLED structure incorporates multiple functional pixel types within a single device architecture. The first pixels provide directed light emission for display functions, while the second pixels provide light transmission for transparency functions, allowing the device to perform multiple optical functions without requiring separate complex systems.
3Ease of operation
If conventional OLED displays use complex constructions to emit light through one surface, then light emission directionality is improved, but manufacturing cost increases
Solution Approach 1:
The display apparatus is manufactured with segmented pixel regions that have different optical configurations. This segmentation allows standard manufacturing processes to be used for both first and second pixels, reducing the need for complex, costly manufacturing steps while achieving the desired light emission directionality in display regions.
Solution Approach 2:
The invention changes key structural parameters of the OLED pixels to achieve different optical functions. By adjusting parameters such as electrode configuration, organic layer structure, and pixel geometry, the device achieves directed light emission in some regions and high transparency in others, without requiring fundamentally different manufacturing processes.
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 achieves a balance between transparency and light emission, allowing for flexible, cost-effective, and efficient OLED displays that can be used in various applications, including full-color displays and general illumination, with the ability to emit light primarily through one surface.
Implementation Method 1
OLEDs make use of thin organic films that emit light when voltage is applied across the device
Implementation Method 2
One application for phosphorescent emissive molecules is a full color display
Data Source
AI summary
A transparent emissive device is provided. The device may include one or more OLEDs having an anode, a cathode, and an organic emissive layer disposed between the anode and the cathode. In some configurations, the OLEDs may be non-transparent. The device may also include one or more locally transparent regions, which, in combination with the non-transparent OLEDs, provides an overall device transparency of 5% or more.