Double-Color Micro LED Pixel Structure for High Resolution Output
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Solution Overview
Problem
Miniaturization and portability requirements in LED panels lead to reduced pixel size, decreased light output efficiency, and increased light crosstalk due to complex alignment and fabrication challenges in multi-color light emitting pixel units.
Innovation Solution
A double color micro LED display panel design featuring a substrate with two light emitting diodes of different colors per pixel, utilizing a P-type and N-type semiconductor layer configuration, along with insulation and conductive layers to enhance light directionality and reduce crosstalk, and incorporating reflective and optical isolation components to improve light output and resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the pixel size is decreased to achieve high resolution, then the resolution is improved, but the light output area and light output rate are reduced
Solution Approach 1:
The patent combines two light emitting diodes (first LED and second LED) into a single pixel unit, sharing common electrode structures (anode and cathode) and semiconductor layers. This merging approach increases the light emitting area within the pixel without proportionally increasing the distance to adjacent pixels, thereby improving light output rate while maintaining high resolution
Solution Approach 2:
The patent utilizes vertical stacking of semiconductor layers (first semiconductor layer, second semiconductor layer, third semiconductor layer) to accommodate multiple LEDs within a compact planar footprint. By arranging LED structures in multiple dimensions (vertical layering), the pixel can emit more light in the lateral direction without increasing pixel area, thus improving light output rate while maintaining small pixel size for high resolution
2Measurement precision
If the pixel size is decreased to achieve high resolution, then the resolution is improved, but the light crosstalk between adjacent pixels increases
Solution Approach 1:
The patent extracts and isolates the light emission paths of individual LEDs within the pixel using insulation layers and reflective structures. By separating the light paths from adjacent pixels through these extracted boundary elements, crosstalk is minimized while maintaining compact pixel dimensions for high resolution
Solution Approach 2:
The patent introduces insulation layers and reflective structures as intermediary elements between adjacent pixels. These intermediaries block or redirect stray light from one pixel to another, effectively reducing light crosstalk while allowing pixels to be positioned closely together for high resolution display
3Adaptability or versatility
If multiple light emitting regions are integrated in one pixel to achieve multi-color emission, then the color variety is improved, but the alignment accuracy and manufacturing complexity are reduced
Solution Approach 1:
The patent merges multiple LED structures into a single integrated pixel unit with shared electrode structures and semiconductor layers. By combining the fabrication processes for multiple LEDs into one unified structure, alignment accuracy is maintained while achieving multi-color emission capability within each pixel
Solution Approach 2:
The patent segments the pixel into distinct functional regions (first LED region, second LED region, insulation regions, reflective regions) with clearly defined boundaries. This segmentation allows each region to be fabricated with precise dimensional control, maintaining alignment accuracy while enabling multiple light emitting regions to coexist in one pixel
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
Increases light emitting efficiency, reduces volume, and enhances display resolution by allowing two colors to be emitted within a single pixel, while minimizing light crosstalk through strategic placement of reflective and optical isolation components.
Implementation Method 1
The first semiconductor layer and the third semiconductor layer form a first light emitting diode to emit a first light
Implementation Method 2
The first semiconductor layer is configured on the substrate, the second semiconductor layer is configured on the first semiconductor layer, and the third semiconductor layer is configured between the first semiconductor layer and the second semiconductor layer
Implementation Method 3
the second semiconductor layer and the third semiconductor form a second light emitting diode to emit a second light
Implementation Method 4
The second semiconductor layer is configured on the first semiconductor layer, and the third semiconductor layer is configured between the first semiconductor layer and the second semiconductor layer
Implementation Method 5
a plurality of reflective components respectively disposed on the first conductive pads and configured to reflect the first light and the second light to a certain direction
Implementation Method 6
a plurality of optical isolation components respectively disposed on the first conductive pads and configured to block the first light and the second light emitted from one of the pixels to the other of the pixels
Data Source
AI summary
The present invention discloses a double color micro LED display panel including a plurality of pixels. Each of the pixels includes a substrate, a first semiconductor layer configured on the substrate, a second semiconductor layer configured on the first semiconductor layer, and a third semiconductor layer configured between the first semiconductor layer and the second semiconductor layer. The first semiconductor layer and the second semiconductor layer are P type, and the third semiconductor layer is N type. The first semiconductor layer and the third semiconductor layer form a first light emitting diode to emit a first light, and the second semiconductor layer and the third semiconductor layer form a second light emitting diode to emit a second light.