Stacked Micro-LED Sub-Emitting Elements for Partition-Free Displays
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Solution Overview
Problem
The challenge in fabricating high-resolution ultra-small light emitting diode display panels for head-mounted displays is the difficulty in creating a wavelength conversion layer without a high aspect ratio partition wall, which is hard to manufacture.
Innovation Solution
Incorporating three ultra-small light emitting diode elements emitting red, green, and blue light, eliminating the need for a wavelength conversion layer and partition wall by using a configuration where each light emitting element includes a first sub light emitting element, a second sub light emitting element, and a third sub light emitting element with connection electrodes and adhesive layers, allowing for the display of various colors without a wavelength conversion layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a wavelength conversion layer is used to display various colors in ultra-small light emitting diode display panels, then color display capability is improved, but manufacturing complexity increases due to the requirement of high aspect ratio partition walls
Solution Approach 1:
The patent removes the wavelength conversion layer and partition wall structures from the display panel configuration. Instead of converting light wavelengths, the invention directly uses multiple ultra-small light emitting diode elements that emit different colors (red, green, blue) to achieve color display, thereby eliminating the manufacturing complexity associated with creating high aspect ratio partition walls
Solution Approach 2:
The patent divides the display into multiple independent ultra-small light emitting diode elements, each capable of emitting a specific color. This segmentation approach allows each element to be independently controlled and eliminates the need for a unified wavelength conversion layer, simplifying the overall structure while maintaining color display capability
2Adaptability or versatility
If a wavelength conversion layer with partition wall is implemented, then color display is achieved, but fabrication difficulty increases due to high aspect ratio requirements
Solution Approach 1:
The invention extracts and removes the wavelength conversion layer and partition wall components from the system. By using directly emitting ultra-small light emitting diode elements in red, green, and blue colors, the patent achieves color display without requiring the complex fabrication processes needed to create high aspect ratio partition walls
Solution Approach 2:
Instead of using a single light source with wavelength conversion to achieve multiple colors, the patent inverts the approach by using multiple independent light sources that naturally emit different colors. This inversion eliminates the need for wavelength conversion infrastructure and simplifies fabrication
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 enables the display of various colors without the need for a wavelength conversion layer or partition wall, simplifying the manufacturing process and improving the efficiency of the display panel.
Implementation Method 1
Each of the first sub light emitting element, the second sub light emitting element, and the third sub light emitting element may include a first semiconductor layer, an active layer, and a second semiconductor layer sequentially stacked
Data Source
AI summary
A display includes a pixel electrode disposed on a substrate, a light emitting element disposed on the pixel electrode, a connection electrode disposed on a side surface of the light emitting element, and a common electrode disposed on the light emitting element. The light emitting element includes a first sub light emitting element, a second sub light emitting element disposed on the first sub light emitting element, and a third sub light emitting element disposed on the second sub light emitting element. The connection electrode is disposed on at least one side surface of the first sub light emitting element, the second sub light emitting element, and the third sub light emitting element.