Multi-Color LED Pixel Unit for Display Panels
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Solution Overview
Problem
Conventional LED display panels require complex and costly processes to assemble multiple color LEDs, leading to increased power consumption and decreased luminance and color accuracy.
Innovation Solution
A multi-color light emitting pixel unit is developed, featuring a substrate with multiple light emitting transistors, each comprising a bottom conductive layer, an upper conductive layer, and light emitting layers, where electrical connectors isolate and connect the layers to control light emission, allowing for simultaneous fabrication and reduced production complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple monochromatic LEDs are assembled one by one on a substrate to form a multi-color display panel, then the display panel can achieve multi-color emission, but the manufacturing process becomes complicated and production cost increases
Solution Approach 1:
The patent combines multiple monochromatic LED structures (red, green, blue LEDs) into a single integrated multi-color LED pixel unit. The different color light emitting layers are stacked vertically and electrically connected through conductive layers, allowing all colors to be emitted from one unified structure rather than assembling separate LEDs, thereby simplifying the manufacturing process while maintaining multi-color emission capability
Solution Approach 2:
The multi-color LED pixel unit serves multiple functions within a single device structure. It can emit multiple colors (red, green, blue) simultaneously or independently, and the conductive layers can be selectively connected to control different color emissions, providing versatile display functionality while reducing the number of separate components needed
2Adaptability or versatility
If multiple monochromatic LEDs are assembled one by one on a substrate to form a multi-color display panel, then the display panel can achieve multi-color emission, but production cost increases
Solution Approach 1:
The patent combines multiple monochromatic LED structures (red, green, blue LEDs) into a single integrated multi-color LED pixel unit. The different color light emitting layers are stacked vertically and electrically connected through conductive layers, allowing all colors to be emitted from one unified structure rather than assembling separate LEDs, thereby simplifying the manufacturing process while maintaining multi-color emission capability
Solution Approach 2:
The multi-color LED pixel unit serves multiple functions within a single device structure. It can emit multiple colors (red, green, blue) simultaneously or independently, and the conductive layers can be selectively connected to control different color emissions, providing versatile display functionality while reducing the number of separate components needed
3Adaptability or versatility
If multiple monochromatic LEDs are assembled one by one on a substrate to form a multi-color display panel, then the display panel can achieve multi-color emission, but power consumption increases
Solution Approach 1:
The patent combines multiple monochromatic LED structures (red, green, blue LEDs) into a single integrated multi-color LED pixel unit. The different color light emitting layers are stacked vertically and electrically connected through conductive layers, allowing all colors to be emitted from one unified structure rather than assembling separate LEDs, thereby simplifying the manufacturing process while maintaining multi-color emission capability
Solution Approach 2:
The patent implements electrical connection between different color light emitting layers through conductive layers, enabling continuous and efficient current flow through all LED structures. This allows the LEDs to be driven simultaneously or selectively without interruption, improving energy utilization efficiency and reducing overall power consumption compared to separate assembly approaches
4Adaptability or versatility
If multiple monochromatic LEDs are assembled one by one on a substrate to form a multi-color display panel, then the display panel can achieve multi-color emission, but luminance and color accuracy decrease
Solution Approach 1:
The patent applies different semiconductor materials with specific bandgaps to different light emitting layers (red, green, blue) to optimize the emission characteristics of each layer. By carefully selecting materials and controlling the local properties of each layer, the device achieves high luminance and accurate color emission for each color while maintaining overall multi-color functionality
Solution Approach 2:
The patent combines multiple monochromatic LED structures (red, green, blue LEDs) into a single integrated multi-color LED pixel unit. The different color light emitting layers are stacked vertically and electrically connected through conductive layers, allowing all colors to be emitted from one unified structure rather than assembling separate LEDs, thereby simplifying the manufacturing process while maintaining multi-color emission capability
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 simplifies the manufacturing process, reduces production costs, and enhances luminance and color accuracy by allowing for precise control of light emission from each LED, resulting in improved display performance and efficiency.
Implementation Method 1
A light emitting diode (LED), which is a kind of semiconductor diode, can convert electrical energy into optical energy. Under a positive bias, holes flow from a P region into an N region and electrons flow from the N region into the P region, and the combination between the electrons in the N region and the holes in the P region produces spontaneous radiation of excitation light.
Data Source
AI summary
A multi-color light emitting pixel unit includes a substrate, and a light emitting transistor formed on the substrate. The light emitting transistor includes a bottom conductive layer formed on the substrate and a top conductive layer formed over the bottom conductive layer, an upper light emitting layer formed between the top conductive layer and the bottom conductive layer, at least one lower light emitting layer formed between the upper light emitting layer and the bottom conductive layer, and an electrical connector electrically connecting the at least one lower light emitting layer and the bottom conductive layer.