OLED Display Segmented Electrodes for Sub-Image
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Solution Overview
Problem
Existing organic light emitting diode (OLED) display devices face challenges in simultaneously displaying a main image and a sub-image without reducing the resolution or requiring additional processes, leading to issues like reduced brightness and efficiency.
Innovation Solution
The OLED display device incorporates a substrate with a thin film transistor, insulating layers, first and second lower electrodes, organic layers with emission layers, and an upper electrode, along with separate sub-pixel and auxiliary pixel regions, allowing for simultaneous display of main and sub-images without additional processes or resolution reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a separate pixel region for displaying the sub-image is formed, then the sub-image can be displayed simultaneously, but the emission area of the main image pixel region is reduced, resulting in reduced brightness and efficiency
Solution Approach 1:
The pixel region is segmented into a main pixel region for displaying the main image and a sub-pixel region for displaying the sub-image. The lower electrode is correspondingly divided into a main lower electrode and a sub lower electrode, allowing independent control and emission area allocation for both images without compromising the brightness of the main image.
2Adaptability or versatility
If a separate pixel region for displaying the sub-image is formed, then the sub-image can be displayed simultaneously, but additional processes are required, increasing device complexity
Solution Approach 1:
The main pixel region and sub-pixel region share common structural components including the substrate, thin film transistor, insulating layer, organic layers, and upper electrode. Only the lower electrode is segmented into main and sub portions, significantly reducing the number of additional processes required compared to completely separate pixel structures.
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 enables the OLED display device to simultaneously display main and sub-images without reducing resolution, maintaining brightness and efficiency by using separate sub-pixel and auxiliary pixel regions with distinct electrodes and organic layers.
Implementation Method 1
An OLED is a display device operates by coupling electrons and holes, which are injected through a cathode and an anode, to form excitons. The excitons return to a non-excited state, by generating light having a specific wavelength.
Data Source
AI summary
An organic light emitting diode display device to display a main image and a sub-image, such as background, illumination, or the like, without additional processes or a reduction in the resolution of the image, and a method of fabricating the same, the organic light emitting diode display device including: a substrate; a thin film transistor disposed on the substrate, including a semiconductor layer, a source electrode, a drain electrode, a gate insulating layer, and a gate electrode; an insulating layer disposed on the thin film transistor; a first lower electrode disposed on the insulating layer, electrically connected to the source electrode and the drain electrode of the thin film transistor; an auxiliary lower electrode disposed on the insulating layer, spaced apart from the first lower electrode; a first organic layer disposed on the first lower electrode, including at least one emission layer; a second organic layer disposed on the auxiliary lower electrode, including at least one emission layer; and an upper electrode disposed on the first organic layer and the second organic layer.