AMOLED Double-Side Display with Alternating Emission
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Solution Overview
Problem
Current AMOLED double-sided display designs either result in mirrored images or require complex, costly structures with multiple panels and ICs, failing to meet consumer expectations for thinness and cost-effectiveness.
Innovation Solution
An AMOLED double-sided display design featuring a substrate with alternating top-emitting and bottom-emitting OLED units, where the anode of top-emitting units is thicker and reflective, and the cathode of bottom-emitting units is thicker and light-transmissive, allowing for single IC control and eliminating mirrored images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the anode and cathode are made thin and transparent to enable simultaneous front and back display, then the display capability is improved, but the image displayed on the back side becomes a mirrored image of the front side
Solution Approach 1:
The OLED array layer is segmented into two distinct types of OLED units: top-emitting OLED units and bottom-emitting OLED units. These units are arranged in an alternating pattern within the same layer, allowing each segment to emit light in a specific direction (upward or downward) without interfering with the other, thereby enabling proper orientation on both sides of the display panel.
Solution Approach 2:
Different regions of the OLED array layer are assigned different emission characteristics. Top-emitting OLED units have their light emission directed upward toward the front side, while bottom-emitting OLED units have their light emission directed downward toward the back side. This local differentiation in emission quality ensures that each side of the display presents correctly oriented images to observers.
2Ease of operation
If two separate AMOLED panels with two integrated circuits are used to avoid directional distortion, then the image orientation is improved, but the device structure becomes complex and production cost increases
Solution Approach 1:
The invention merges the functionality of two separate AMOLED panels into a single integrated OLED array layer. By combining top-emitting and bottom-emitting OLED units in one layer, the design achieves double-sided display with correct image orientation on both sides while eliminating the need for two separate panels and two integrated circuits, thus reducing structural complexity and production cost.
Solution Approach 2:
The single OLED array layer performs multiple functions simultaneously: it displays images on both the front and back sides of the panel with correct orientation, replaces what would traditionally require two separate panels and two ICs, and maintains a unified thin structure. This multi-functionality resolves the contradiction between image quality and device complexity.
3Ease of operation
If two separate AMOLED panels are attached back-to-back to prevent mirrored images, then the image orientation is improved, but the display panel thickness increases
Solution Approach 1:
The invention embeds both top-emitting and bottom-emitting OLED units within a single nested OLED array layer structure. This nested arrangement allows the dual-sided display functionality to be contained within one thin layer rather than requiring two separate panels stacked together, thereby maintaining thinness while achieving correct image orientation on both sides.
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 design achieves double-sided displaying without mirrored images, using only a single display panel and control IC, while reducing production costs and ensuring a thin, high-quality display.
Implementation Method 1
the first anode being reflective and the second cathode being light-transmissive; the cathode of the top-emitting OLED unit and the cathode of the bottom-emitting OLED unit being the first cathode and the second cathode respectively, the second cathode being thicker than the first cathode, the first cathode being light-transmissive and the second cathode being reflective
Data Source
AI summary
An AMOLED doubled-sided display includes an OLED array layer that includes a plurality of top-emitting OLED units and a plurality of bottom-emitting OLED units arranged alternate with each other to form an array. Each of the top-emitting OLD units and the bottom-emitting OLED units has different thickness for respective anodes and cathodes, to realize the top-emitting characteristics of the top-emitting OLED units and the bottom-emitting characteristics of the bottom-emitting OLED units. As such, by designing an algorithm for a single IC to control image displaying, only a display panel and a control IC are sufficient to achieve double-sided displaying, and ensure an observer standing in front of the display panel will not see mirrored image or directional distorted image, as well as achieve low-cost and quality display result.