Double-Sided OLED Display with Alternating Emission
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Solution Overview
Problem
Current double-sided display devices are bulky, costly, and do not meet consumer demands for lightweight and compactness, as they require combining two single-sided displays in a back-to-back manner to achieve double-sided displaying.
Innovation Solution
A double-sided OLED display device is designed with alternating rows or columns of top-emission and bottom-emission OLEDs, integrated with a TFT backplate and polarizer, allowing for normal image observation from both sides without the need for a back-to-back combination of displays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two independent single-sided display devices are combined in a back-to-back manner to achieve double-sided displaying, then double-sided displaying function is achieved, but the device becomes bulky and occupies more space
Solution Approach 1:
The patent merges two single-sided display devices into one integrated double-sided OLED display device by sharing common structural components (substrate, electrodes, encapsulation layers) between the front-emitting and back-emitting display regions. This integration eliminates the need for separate devices while achieving double-sided displaying functionality, thereby reducing overall device volume and weight.
Solution Approach 2:
The patent utilizes the z-dimension (thickness direction) to create dual-display functionality by configuring OLEDs to emit light in opposite directions (front and back) from the same planar structure. This dimensional approach allows double-sided displaying without increasing the device's footprint area, effectively solving the space occupation problem.
2Adaptability or versatility
If two independent single-sided display devices are combined in a back-to-back manner, then double-sided displaying is achieved, but manufacturing cost increases
Solution Approach 1:
The patent combines the manufacturing processes of two separate displays into a single integrated fabrication process. By forming both front-emitting and back-emitting OLED structures on one substrate simultaneously, the patent reduces material consumption, simplifies assembly operations, and lowers overall manufacturing costs compared to producing and assembling two independent display devices.
Solution Approach 2:
The patent creates a universal display structure that performs multiple functions (front display and back display) through a single device architecture. This multi-functionality is achieved by designing the OLED structure with both top-emission and bottom-emission capabilities, allowing one device to replace two separate devices and thereby reducing total manufacturing expenditure.
3Adaptability or versatility
If two independent single-sided display devices are combined, then double-sided displaying is achieved, but the device structure becomes complex and aesthetics are compromised
Solution Approach 1:
The patent merges the structural elements of two separate displays into a unified, streamlined architecture. By integrating the substrate, functional layers, and encapsulation structures into a single coherent design, the patent eliminates the need for complex assembly of multiple independent devices, thereby simplifying the overall structure while maintaining double-sided displaying functionality.
4Adaptability or versatility
If two independent single-sided display devices are combined, then double-sided displaying is achieved, but installation and maintenance costs increase
Solution Approach 1:
The patent combines installation and maintenance operations for two separate displays into a single unified process. By integrating both display functions into one device, the patent reduces the number of installation steps, minimizes alignment requirements, and simplifies troubleshooting and repair procedures, thereby lowering operational costs and improving ease of maintenance.
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 reduces space occupation, lowers manufacturing costs, and enhances aesthetics by enabling double-sided displaying with a single device, expanding application range and improving visual experience.
Implementation Method 1
each of the sub-pixels comprising an OLED; wherein the pixels located in one row of the array or the pixels located in one column of the array collectively form a displaying section, and for two adjacent ones of the displaying sections, the OLEDs of the pixels of one of the displaying sections are top-emission OLEDs, and the OLEDs of the pixels of the other one of the displaying sections are bottom-emission OLEDs
Implementation Method 2
the top-emission OLED comprises a first anode, a first OLED emissive layer arranged on the first anode, and a transparent cathode set on and covering the first OLED emissive layer; and the bottom-emission OLED comprises a second anode, a second OLED emissive layer arranged on the second anode, and a non-transparent cathode set on and covering the second OLED emissive layer
Data Source
AI summary
The present invention provides a double-sided OLED display device, in which two adjacent ones of displaying sections (A) are arranged such that OLEDs of all the pixels (P) located in one of the displaying sections (A) are top-emission OLEDs (D), while the OLEDs of all the pixels (P) located in another one of the displaying sections (A) are bottom-emission OLEDs (D′). A user is allowed to observe normal displaying of images in two opposite directions associated with the front and rear sides of one OLED display device and there is no need to combine two display devices in a back-to-back manner to provide double-sided displaying so that the application range of the OLED display device can be widened, the amount of space occupied by the double-sided display device can be reduced, and aesthetics of the double-sided display devices can be greatly improved.