Hybrid OLED and Micro LED Display for Narrow-Bezel Screens
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Solution Overview
Problem
The existing AMOLED displays have a non-display region due to the bezel region, which cannot display content and poses a challenge in reducing this area effectively, especially since the organic light-emitting material is sensitive to oxygen and water vapor, requiring a package layer that prevents water and oxygen ingress but cannot accommodate OLED pixels.
Innovation Solution
Incorporating micro LED components in the bezel region to replace the dam structure, allowing for content display and utilizing a thin film package layer to isolate water vapor and oxygen, while also simplifying the fabrication process by using existing AMOLED fabrication techniques and reducing the quantity of micro LED components needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a bezel region is provided around the AMOLED display to protect organic light-emitting materials from oxygen and water vapor, then the reliability of the display is improved, but the area of the non-display region increases
Solution Approach 1:
The patent changes the material parameter in the bezel region from organic light-emitting material to micro LED material, which has different protection requirements. This parameter change allows the bezel region to be smaller since micro LEDs are less sensitive to oxygen and water vapor, thus reducing the non-display area while maintaining reliability
Solution Approach 2:
The patent applies different light-emitting materials to different regions: organic light-emitting material in the central display region and micro LED material in the bezel region. This local differentiation allows each region to have optimal protection characteristics, reducing the overall bezel size needed for protection
2Area of stationary object
If the micro LED component area is reduced to minimize non-display region, then the area of the display region increases, but the manufacturing precision requirements increase
Solution Approach 1:
The patent segments the display into a central region with organic OLEDs and a surrounding bezel region with micro LEDs. This segmentation allows different manufacturing approaches for each region, with the micro LED region using standardized components that can be precisely placed using established transfer technologies
Solution Approach 2:
The patent introduces a driver circuit backplane as an intermediary structure that receives both organic OLEDs and micro LEDs. This backplane provides a standardized interface and placement platform, reducing the direct precision requirements between different component types and facilitating integrated manufacturing
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 approach effectively narrows down the non-display region of the AMOLED display, enabling content display in previously non-display areas and overcoming the challenge of transferring and placing a large quantity of micro LED components, while maintaining the sealing requirements of OLEDs.
Implementation Method 1
each subpixel of the first pixel layer includes one organic light-emitting diode OLED component
Implementation Method 2
each subpixel of the second pixel layer includes one micro light-emitting diode micro LED component
Data Source
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Figure 1C
AI summary
This application provides a display, an electronic device, and a display fabrication method. The display includes a substrate; a driver circuit backplane, including a plurality of driver circuit units, where the driver circuit backplane is disposed above the substrate; a first pixel layer, including a plurality of pixels, where each pixel of the first pixel layer includes a plurality of subpixels, each subpixel of the first pixel layer includes one organic light-emitting diode OLED component, the first pixel layer is disposed above the driver circuit backplane, and the OLED component of each subpixel of the first pixel layer is connected to at least one driver circuit unit in the driver circuit backplane; and a second pixel layer, including a first electrode layer, a second electrode layer, and a plurality of pixels disposed between the first electrode layer and the second electrode layer, where each pixel of the second pixel layer includes a plurality of subpixels, each subpixel of the second pixel layer includes one micro light-emitting diode micro LED component, the second pixel layer is disposed above the substrate and surrounds the first pixel layer. The display has a narrower bezel.