Double-Sided OLED With Shared Electrode for Independent Pixel Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In double-sided organic light-emitting diode (OLED) displays, existing technologies cannot independently control the light emission from both sides of the OLED, leading to increased display area and reduced resolution due to shared electrode integration, which limits independent control of top and bottom emitting OLEDs.
Innovation Solution
A double-sided organic light-emitting diode structure is developed with a shared electrode connected to the output end of a thin film transistor, allowing independent control of two OLEDs by using a transparent conducting layer and a transparent insulating layer to isolate the electrodes, enabling independent voltage control between the electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a top emitting OLED and a bottom emitting OLED are arranged side by side corresponding to one pixel, then double-sided light emission is achieved, but the display area occupied by one pixel is increased
Solution Approach 1:
The patent merges a top emitting OLED and a bottom emitting OLED into a single integrated double-sided OLED structure. The first organic light-emitting diode and second organic light-emitting diode are stacked vertically and share a common electrode (the first electrode), allowing both devices to occupy the same pixel area while emitting light from opposite sides.
2Device complexity
If the TFT and one electrode of the OLED pixel are integrated together to use the TFT to drive two OLEDs, then device complexity is reduced, but independent control of the two OLEDs cannot be implemented
Solution Approach 1:
The patent segments the electrode control structure by introducing a second electrode that is electrically isolated from the first electrode. This segmentation allows the first organic light-emitting diode and second organic light-emitting diode to be controlled independently through their respective electrodes, while still sharing the common first electrode, thus achieving both simplified structure and independent control.
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 solution allows for independent control of light emission from both sides of the OLED, enhancing display resolution by integrating two OLEDs while maintaining independent control, thus improving the display's pixel resolution.
Implementation Method 1
double-sided organic light-emitting diode
Data Source
AI summary
A double-sided organic light-emitting diode and manufacturing method thereof, and a display device using double-sided organic light-emitting diode pixel configuration are described. The double-sided organic light-emitting diode includes a first electrode, a first organic semiconductor layer disposed on the first electrode, a shared electrode disposed on the first organic semiconductor layer and electrically connected to the output terminal of a thin film transistor; a second organic semiconductor layer disposed on the shared electrode, and a second electrode disposed on the second organic semiconductor. The first electrode, the shared electrode and the second electrode are electrically insulated from each other, and two organic light-emitting diodes in the double-sided organic light emitting diode can be independently controlled.